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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 10-Q
(Mark One)

☒ |  | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2024
OR

☐ |  | TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from _____________ to ______________
Commission File No. 001-37811
BOK FINANCIAL CORP
(Exact name of registrant as specified in its charter)

Oklahoma |  | 73-1373454
(State or other jurisdiction of Incorporation or Organization) |  | (IRS Employer Identification No.)
Bank of Oklahoma Tower |  |
Boston Avenue at Second Street |  |
Tulsa, | Oklahoma |  | 74192
(Address of Principal Executive Offices) |  | (Zip Code)

(918) 588-6000
(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:
Title of each class |  | Trading Symbol |  | Name of each exchange on which registered
Common Stock, par value $0.00006 per share |  | BOKF |  | Nasdaq Stock Market

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ý No ¨
Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes ý No ¨
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act.
Large accelerated filer ý Accelerated filer ¨
Non-accelerated filer ¨ Smaller reporting company ☐
Emerging growth company ☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨
Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐ No ý
Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date: 64,515,035 shares of common stock ($.00006 par value) as of March 31, 2024.
BOK Financial Corporation
Form 10-Q
Quarter Ended March 31, 2024
Index

Glossary of Defined Terms | 1
Part I. Financial Information
Management's Discussion and Analysis (Item 2) | 2
Market Risk (Item 3) | 39
Controls and Procedures (Item 4) | 43
Consolidated Financial Statements – Unaudited (Item 1) | 44
Quarterly Financial Summary – Unaudited (Item 2) | 89
Quarterly Earnings Trend – Unaudited | 92
Part II. Other Information
Item 1. Legal Proceedings | 93
Item 1A. Risk Factors | 93
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds | 93
Item 5. Other Information | 93
Item 6. Exhibits | 94
Signatures | 95

- 1 -

GLOSSARY OF DEFINED TERMS
The following items may be used throughout this report, including the consolidated financial statements and related notes.

Term |  | Definition
AFS |  | Available For Sale
AOCI |  | Accumulated Other Comprehensive Income
ASU |  | Accounting Standards Update
ATM |  | Automated Teller Machine
Board |  | Board of Directors of BOK Financial Corporation
BOK Financial |  | BOK Financial Corporation
BOKF |  | BOK Financial Corporation
BOKF Insurance |  | BOK Financial Insurance, Inc.
BOKFI |  | BOK Financial Insurance, Inc.
CECL |  | Current Expected Credit Losses
Company |  | BOK Financial Corporation
EFT |  | Electronic Funds Transfer
FASB |  | Financial Accounting Standards Board
FDIC |  | Federal Deposit Insurance Corporation
GAAP |  | Generally Accepted Accounting Principles in the United States of America
GDP |  | Gross Domestic Product
GNMA |  | Government National Mortgage Association
MSR |  | Mortgage Servicing Rights
Nasdaq |  | National Association of Securities Dealers Automated Quotations
NYMEX |  | New York Mercantile Exchange
PPNR |  | Pre-Provision Net Revenue
RMHFS |  | Residential Mortgages Held for Sale
SEC |  | Securities and Exchange Commission
SOFR |  | Secured Overnight Financing Rate
SVaR |  | Stressed Value at Risk
TransFund |  | BOKF's electronic funds transfer network
USDC |  | United States District Court
VA |  | U.S. Department of Veterans Affairs
VaR |  | Value at Risk
WTI |  | West Texas Intermediate

- 1 -

Management's Discussion and Analysis of Financial Condition and Results of Operations
Performance Summary
BOK Financial reported net income of $83.7 million or $1.29 per diluted share for the first quarter of 2024 compared to $82.6 million or $1.26 per diluted share for the fourth quarter of 2023. Excluding the loss from repositioning of the available for sale securities portfolio and the additional FDIC special assessment expense, net income would have been $123.2 million or $1.91 per share for the first quarter of 2024, both of which are non-GAAP measures. PPNR, also a non-GAAP measure, decreased $2.6 million to $114.9 million compared to the fourth quarter of 2023.
Highlights of the first quarter of 2024 compared to the fourth quarter of 2023 included:
•Net interest revenue totaled $293.6 million, a decrease of $3.1 million compared to the prior quarter. Net interest margin was 2.61% for the first quarter of 2024 compared to 2.64% for the prior quarter reflecting continued demand deposit migration and deposit repricing. For the first quarter of 2024, our core net interest margin excluding trading activities, a non-GAAP measure, was 2.97% compared to 3.03% in the prior quarter.
•Fees and commissions revenue totaled $200.6 million, an increase of $3.8 million. Higher mortgage banking and fiduciary and asset management revenue was partially offset by lower brokerage and trading and transaction card revenue.
•Other operating expense totaled $340.4 million, a decrease of $43.7 million. Personnel expense was relatively unchanged, while non-personnel expense decreased $43.3 million resulting from the recognition of the FDIC special assessment in the fourth quarter of 2023.
•Other gains and losses, net decreased $36.2 million to $4.3 million. The prior quarter included a $31.0 million pre-tax gain, before related professional fees, on the sale of insurance brokerage and consulting business, BOKFI.
•Losses on available for sale securities were $45.2 million in the first quarter of 2024 as we repositioned the available for sale securities portfolio by selling approximately $783 million of lower-yielding debt securities. We expect the gain on conversion of our Visa B shares under the recently announced exchange offer by Visa, Inc. (the "Exchange Offer") will offset the realized losses on the repositioning. The Exchange Offer opened on April 8, 2024 and is scheduled to expire at end of day on May 3, 2024.
•Period end outstanding loan balances totaled $24.2 billion at March 31, 2024, growing $268 million over December 31, 2023, largely due to growth in commercial loans, partially offset by a reduction in commercial real estate loans. Average loan balances increased $243 million to $23.9 billion.
•The provision for credit losses of $8.0 million in the first quarter of 2024 reflects continued loan growth and a stable economic forecast. Net charge-offs were $5.5 million or 0.09% of average loans on an annualized basis in the first quarter. The resulting combined allowance for credit losses totaled $329 million or 1.36% of outstanding loans at March 31, 2024. The combined allowance for credit losses was $326 million or 1.36% of outstanding loans at December 31, 2023.
•Nonperforming assets not guaranteed by U.S. government agencies were $113 million, a $25 million decrease compared to December 31, 2023. Potential problem loans increased by $40 million while other loans especially mentioned decreased by $28 million compared to December 31, 2023.
•Period end deposits were $35.4 billion at March 31, 2024, a $1.4 billion increase over December 31, 2023. Average deposits increased $1.3 billion, including a $2.1 billion increase in average interest-bearing deposits, partially offset by a $747 million reduction in demand deposit balances. The loan to deposit ratio was 68% at March 31, 2024, compared to 70% at December 31, 2023.
•Assets under management or administration totaled $105.5 billion at March 31, 2024, increasing $794 million compared to December 31, 2023.
- 2 -

•The Company's tangible common equity ratio, a non-GAAP measure, was 8.21% at March 31, 2024 and 8.29% at December 31, 2023. The tangible common equity ratio is primarily based on total shareholders' equity, which includes unrealized gains and losses on available for sale securities. Adjusted for all securities portfolio losses, including the tax adjusted losses in the investment portfolio, the tangible common equity ratio would be 7.92% at March 31, 2024 and 8.02% at December 31, 2023.
•The common equity Tier 1 capital ratio at March 31, 2024 was 11.99%. Other regulatory capital ratios include the Tier 1 capital ratio at 12.00%, total capital ratio at 13.15%, and leverage ratio at 9.42%. At December 31, 2023, the common equity Tier 1 capital ratio was 12.06%, the Tier 1 capital ratio was 12.07%, total capital ratio was 13.16%, and leverage ratio was 9.45%.
•The Company repurchased 616,630 shares of common stock at an average price of $83.89 per share in the first quarter of 2024 and 700,237 shares at an average price of $70.99 in the fourth quarter of 2023. We view share buybacks opportunistically, but within the context of maintaining our strong capital position.
•The Company paid a regular cash dividend of $35.6 million or $0.55 per common share during the first quarter of 2024. On April 30, 2024, the board of directors approved a quarterly cash dividend of $0.55 per common share payable on or about May 30, 2024 to shareholders of record as of May 15, 2024.
Highlights of the three months ended March 31, 2024 compared to the three months ended March 31, 2023 included:
•Tax-equivalent net interest revenue totaled $295.7 million for the three months ended March 31, 2024 and $354.6 million for the three months ended March 31, 2023. Net interest revenue decreased $51.4 million from changes in interest rates and decreased $7.5 million from changes in earning assets. Net interest margin was 2.61% compared to 3.45%. In response to rising inflation, the Federal Reserve increased the federal funds rate 525 basis points since the beginning of 2022. The resulting impact on market interest rates increased net interest margin at first as our earning assets, led by our significant percentage of variable-rate commercial loans, repriced at a higher rate and faster pace than our interest-bearing liabilities. Throughout 2023 and into the first quarter of 2024, we have experienced margin compression reflecting deposit repricing activity and demand deposit migration into interest-bearing accounts. Loan yields increased 73 basis points while funding costs increased 165 basis points. Average earning assets increased $4.1 billion to $44.8 billion driven largely by higher average loan balances and trading securities balances. Total interest-bearing deposits increased $5.3 billion, offset by a decrease of $3.8 billion in demand deposit balances. Other borrowed funds increased $1.8 billion.
•Fees and commissions revenue totaled $200.6 million for the three months ended March 31, 2024, a $14.6 million increase over the three months ended March 31, 2023. Brokerage and trading revenue increased $6.8 million, primarily due to increased trading activity and favorable market opportunities. Fiduciary and asset management revenue increased $4.6 million led by growth in Cavanal Hill fund fees and trust fees. Mortgage banking revenue increased $4.6 million, primarily due to higher production volume. Other revenue decreased $4.0 million, largely due to lower revenue on bank-owned life insurance and a reduction in fees earned on derivative counterparty margin.
•Total operating expense was $340.4 million for the three months ended March 31, 2024, an increase of $34.6 million compared to the three months ended March 31, 2023. Personnel expense increased $20.5 million. Regular compensation increased $8.8 million, largely related to annual merit increases, salary adjustments, and business expansion in 2023. Cash-based incentive compensation grew $8.2 million due to higher sales activity. Share-based compensation expense decreased $2.0 million reflecting changes in assumptions of certain performance-based equity awards. Deferred compensation expense, which is offset by changes in fair value of deferred compensation investments, grew $2.7 million. Employee benefits expense increased $2.7 million related to higher retirement plan costs and employee healthcare costs. Non-personnel expense increased $14.1 million to $137.7 million, largely due to increased FDIC insurance costs, including the recognition of $6.5 million in additional special assessment expense in the first quarter of 2024. Other expense also increased $4.9 million due to higher operational losses.
•The provision for expected credit losses was $8.0 million for the three months ended March 31, 2024, reflecting growth in loan balances and a stable economic forecast. A $16.0 million provision for expected credit losses was recorded for the three months ended March 31, 2023.
- 3 -

Results of Operations
Net Interest Revenue and Net Interest Margin
Net interest revenue is the interest earned on debt securities, loans and other interest-earning assets less interest paid for interest-bearing deposits and other borrowings. The net interest margin is calculated by dividing tax-equivalent net interest revenue by average interest-earning assets. Net interest spread is the difference between the average rate earned on interest-earning assets and the average rate paid on interest-bearing liabilities. Net interest margin is typically greater than net interest spread due to interest income earned on assets funded by non-interest bearing liabilities such as demand deposits and equity.
Tax-equivalent net interest revenue totaled $295.7 million for the first quarter of 2024, compared to $298.8 million for the prior quarter. Compared to the fourth quarter of 2023, net interest revenue decreased $3.4 million from changes in interest rates and increased $308 thousand from changes in earning assets. Table 1 shows the effect on net interest revenue from changes in average balances and interest rates for various types of earning assets and interest-bearing liabilities.
Average earning assets increased $520 million compared to the fourth quarter of 2023. Average loan balances increased $243 million, largely due to growth in commercial loans, partially offset by a reduction in commercial real estate loans. The average balance of available for sale securities, which consists largely of residential and commercial mortgage-backed securities guaranteed by U.S. government agencies, increased $475 million while the average balance of trading securities decreased $77 million.
Total average deposits increased $1.3 billion over the fourth quarter of 2023, including a $2.1 billion increase in interest-bearing deposits, partially offset by a $747 million decrease in demand deposits. Funds purchased and repurchase agreements declined $1.2 billion while other borrowings decreased $276 million.
Net interest margin was 2.61% compared to 2.64% in the fourth quarter of 2023 driven by continued demand deposit migration and deposit repricing. For the first quarter of 2024, our core net interest margin excluding trading activities, a non-GAAP measure, was 2.97% compared to 3.03% in the prior quarter. The tax-equivalent yield on earning assets was 5.73%, an increase of 9 basis points. Loan yields grew 4 basis points to 7.40%. The available for sale securities portfolio yield increased 21 basis points to 3.48%. The yield on trading securities grew 7 basis points to 5.12% and the yield on interest-bearing cash and cash equivalents decreased 34 basis points to 4.96%.
Funding costs were 4.08%, a 10 basis point increase over the prior quarter. The cost of interest-bearing deposits increased 26 basis points to 3.69%. The cost of funds purchased and repurchase agreements decreased 74 basis points to 4.05% while the cost of other borrowings increased 1 basis point to 5.56%. This beneficial mix shift was enabled by the growth of interest-bearing deposits. The benefit to net interest margin from assets funded by non-interest liabilities was 96 basis points, a decrease of 2 basis points.
Our overall objective is to manage the Company's balance sheet for changes in interest rates as is further described in the Market Risk section of this report. Approximately 81% of our commercial and commercial real estate loan portfolios are either variable rate or fixed rate that will reprice within one year. These loans are funded primarily by deposit accounts that are either non-interest bearing, or that reprice more slowly than the loans. The result is a balance sheet that is asset sensitive, which means that assets generally reprice more quickly than the liabilities. One of the strategies that we use to manage toward a relative rate-neutral position is to purchase fixed-rate residential mortgage-backed securities issued primarily by U.S. government agencies and fund them with market rate-sensitive liabilities. The liability-sensitive nature of this strategy provides an offset to the asset-sensitive characteristics of our loan portfolio. We also may use derivative instruments to manage our interest rate risk.
The effectiveness of these strategies is reflected in the overall change in net interest revenue due to changes in interest rates as shown in Table 1 and in the interest rate sensitivity projections as shown in the Market Risk section of this report.
- 4 -

Table 1 – Volume/Rate Analysis
(In thousands)

|  | Three Months Ended Mar. 31, 2024 / Dec. 31, 2023 |  | Three Months Ended Mar. 31, 2024 / 2023
|  |  |  | Change Due To 1 |  |  |  | Change Due To 1
|  | Change |  | Volume |  | Yield/Rate |  | Change |  | Volume |  | Yield/Rate
Tax-equivalent interest revenue: |  |  |  |  |  |  |  |  |  |  |  |
Interest-bearing cash and cash equivalents |  | $ | (1,091) |  |  | $ | (541) |  |  | $ | (550) |  |  | $ | 499 |  |  | $ | (532) |  |  | $ | 1,031 |
Trading securities |  | (713) |  |  | (1,648) |  |  | 935 |  |  | 34,227 |  |  | 27,916 |  |  | 6,311 |
Investment securities |  | (204) |  |  | (197) |  |  | (7) |  |  | (1,163) |  |  | (1,059) |  |  | (104) |
Available for sale securities |  | 8,037 |  |  | 1,047 |  |  | 6,990 |  |  | 24,481 |  |  | 5,308 |  |  | 19,173 |
Fair value option securities |  | (4) |  |  | (5) |  |  | 1 |  |  | (3,698) |  |  | (3,053) |  |  | (645) |
Restricted equity securities |  | 188 |  |  | (154) |  |  | 342 |  |  | 3,050 |  |  | 2,293 |  |  | 757 |
Residential mortgage loans held for sale |  | (113) |  |  | (61) |  |  | (52) |  |  | (56) |  |  | (128) |  |  | 72 |
Loans |  | 776 |  |  | 1,437 |  |  | (661) |  |  | 70,958 |  |  | 27,290 |  |  | 43,668 |
Total tax-equivalent interest revenue |  | 6,876 |  |  | (122) |  |  | 6,998 |  |  | 128,298 |  |  | 58,035 |  |  | 70,263 |
Interest expense: |  |  |  |  |  |  |  |  |  |  |  |
Transaction deposits |  | 26,306 |  |  | 14,813 |  |  | 11,493 |  |  | 115,845 |  |  | 25,513 |  |  | 90,332 |
Savings deposits |  | 72 |  |  | (8) |  |  | 80 |  |  | 956 |  |  | (96) |  |  | 1,052 |
Time deposits |  | 5,897 |  |  | 2,881 |  |  | 3,016 |  |  | 30,049 |  |  | 14,653 |  |  | 15,396 |
Funds purchased and repurchase agreements |  | (17,251) |  |  | (13,605) |  |  | (3,646) |  |  | (1,786) |  |  | (4,542) |  |  | 2,756 |
Other borrowings |  | (5,002) |  |  | (4,496) |  |  | (506) |  |  | 41,952 |  |  | 30,035 |  |  | 11,917 |
Subordinated debentures |  | (31) |  |  | (15) |  |  | (16) |  |  | 243 |  |  | 9 |  |  | 234 |
Total interest expense |  | 9,991 |  |  | (430) |  |  | 10,421 |  |  | 187,259 |  |  | 65,572 |  |  | 121,687 |
Tax-equivalent net interest revenue |  | (3,115) |  |  | 308 |  |  | (3,423) |  |  | (58,961) |  |  | (7,537) |  |  | (51,424) |
Change in tax-equivalent adjustment |  | (12) |  |  |  |  |  |  | (185) |  |  |  |  |
Net interest revenue |  | $ | (3,103) |  |  |  |  |  |  | $ | (58,776) |  |  |  |  |

1 Changes attributable to both volume and yield/rate are allocated to both volume and yield/rate on an equal basis.

- 5 -

Other Operating Revenue
Other operating revenue was $161.7 million for the first quarter of 2024, a decrease of $43.2 million compared to the fourth quarter of 2023. The first quarter of 2024 included $45.2 million of losses from repositioning the available for sale securities portfolio. The prior quarter included a $31.0 million pre-tax gain on the sale of BOKFI and $1.8 million of insurance brokerage revenue recognized prior to the sale. We also recognized a $27.6 million loss on the sale of available for sale securities in the fourth quarter of 2023.
Table 2 – Other Operating Revenue
(Dollars in thousands)

|  | Three Months Ended |  | Increase (Decrease) |  | % Increase (Decrease) |  | Three Months Ended Mar. 31, 2023 |  | Increase (Decrease) |  | % Increase (Decrease) |  |  |  |  |  |
|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  |  |  |  |  |  |  |  |  |  |
Brokerage and trading revenue |  | $ | 59,179 |  |  | $ | 60,896 |  |  | $ | (1,717) |  |  | (3) | % |  | $ | 52,396 |  |  | $ | 6,783 |  |  | 13 | % |  |  |  |  |  |  |  |
Transaction card revenue |  | 25,493 |  |  | 28,847 |  |  | (3,354) |  |  | (12) | % |  | 25,621 |  |  | (128) |  |  | — | % |  |  |  |  |  |  |  |
Fiduciary and asset management revenue |  | 55,305 |  |  | 51,408 |  |  | 3,897 |  |  | 8 | % |  | 50,657 |  |  | 4,648 |  |  | 9 | % |  |  |  |  |  |  |  |
Deposit service charges and fees |  | 28,685 |  |  | 27,770 |  |  | 915 |  |  | 3 | % |  | 25,968 |  |  | 2,717 |  |  | 10 | % |  |  |  |  |  |  |  |
Mortgage banking revenue |  | 18,967 |  |  | 12,834 |  |  | 6,133 |  |  | 48 | % |  | 14,367 |  |  | 4,600 |  |  | 32 | % |  |  |  |  |  |  |  |
Other revenue |  | 12,935 |  |  | 15,035 |  |  | (2,100) |  |  | (14) | % |  | 16,970 |  |  | (4,035) |  |  | (24) | % |  |  |  |  |  |  |  |
Total fees and commissions revenue |  | 200,564 |  |  | 196,790 |  |  | 3,774 |  |  | 2 | % |  | 185,979 |  |  | 14,585 |  |  | 8 | % |  |  |  |  |  |  |  |
Other gains, net |  | 4,269 |  |  | 40,452 |  |  | (36,183) |  |  | N/A |  | 2,251 |  |  | 2,018 |  |  | N/A |  |  |  |  |  |  |  |
Gain (loss) on derivatives, net |  | (8,633) |  |  | 8,592 |  |  | (17,225) |  |  | N/A |  | (1,344) |  |  | (7,289) |  |  | N/A |  |  |  |  |  |  |  |
Gain (loss) on fair value option securities, net |  | (305) |  |  | 1,031 |  |  | (1,336) |  |  | N/A |  | (2,962) |  |  | 2,657 |  |  | N/A |  |  |  |  |  |  |  |
Change in fair value of mortgage servicing rights |  | 10,977 |  |  | (14,356) |  |  | 25,333 |  |  | N/A |  | (6,059) |  |  | 17,036 |  |  | N/A |  |  |  |  |  |  |  |
Loss on available for sale securities, net |  | (45,171) |  |  | (27,626) |  |  | (17,545) |  |  | N/A |  | — |  |  | (45,171) |  |  | N/A |  |  |  |  |  |  |  |
Total other operating revenue |  | $ | 161,701 |  |  | $ | 204,883 |  |  | $ | (43,182) |  |  | (21) | % |  | $ | 177,865 |  |  | $ | (16,164) |  |  | (9) | % |  |  |  |  |  |  |  |

Certain percentage increases (decreases) in non-fees and commissions revenue are not meaningful for comparison purposes based on the nature of the item.
Fees and commissions revenue
Diversified sources of fees and commissions revenue are a significant part of our business strategy and represented 41% of combined net interest revenue before provision for credit losses and fees and commissions revenue for the first quarter of 2024. We believe that a variety of fee revenue sources provides diversification to changes resulting from market or economic conditions such as interest rates, values in the equity markets, commodity prices and consumer spending, all of which can be volatile. Many of the economic factors, such as decreasing interest rates, that we expect will result in a decline in net interest revenue or fiduciary and asset management revenue may also increase mortgage banking production volumes and related trading. The velocity of changes in market conditions and interest rates may result in timing differences between when offsetting impacts and benefits are realized. Generally, for operating revenues not as directly related to movement in interest rates, we expect growth to come through offering new products and services and by further development of our presence in other markets. However, current and future economic conditions, regulatory constraints, increased competition and saturation in our existing markets could affect the rate of future increases.
Brokerage and Trading Revenue
Brokerage and trading revenue, which includes revenues from trading, customer hedging, retail brokerage, insurance brokerage and investment banking, decreased $1.7 million or 3% compared to the fourth quarter of 2023.
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Trading revenue includes net realized and unrealized gains and losses primarily related to residential mortgage-backed securities guaranteed by U.S. government agencies and related derivative instruments that enable our mortgage banking customers to manage their production risk. Trading revenue also includes net realized and unrealized gains and losses on municipal securities and other financial instruments that we sell to institutional customers, along with changes in the fair value of financial instruments we hold as economic hedges against market risk of our trading securities. Trading revenue was $37.5 million, a $1.9 million increase over the prior quarter, primarily related to increased trading activity largely in U.S. government agency residential mortgage-backed securities.
Customer hedging revenue is based primarily on realized and unrealized changes in the fair value of derivative contracts held for customer risk management programs. As more fully discussed under Customer Risk Management Programs in Note 3 of the Consolidated Financial Statements, we offer commodity, interest rate, foreign exchange and equity derivatives to our customers. Customer hedging revenue totaled $6.3 million, a decrease of $1.3 million, driven by less energy customer activity. Customer hedging revenue includes credit valuation adjustments of the fair value of derivatives to reflect the risk of counterparty default.
Investment banking, which includes fees earned upon completion of underwriting, financial advisory services and loan syndication fees, totaled $10.7 million for the first quarter of 2024 and was relatively consistent with the prior quarter.
Transaction Card Revenue
Transaction card revenue includes revenues from processing transactions on behalf of members of our TransFund electronic fund transfer network, merchant services fees paid by customers for account management and electronic processing of card transactions and interchange fees from our corporate card program. Transaction card revenue totaled $25.5 million for the first quarter of 2024, a $3.4 million decrease, primarily due to seasonally elevated fourth quarter activity and one less day in the quarter.
Fiduciary and Asset Management Revenue
Fiduciary and asset management revenue is earned through managing or holding of assets for customers and executing transactions or providing related services. Fiduciary and asset management revenue is largely based on the fair value of assets. Rates applied to asset values vary based on the nature of the relationship. Fiduciary relationships and managed asset relationships generally have higher fee rates than non-fiduciary and/or managed relationships. Fiduciary and asset management revenue was $55.3 million for the first quarter of 2024, a $3.9 million increase over the fourth quarter of 2023, largely related to movement in the equity markets.
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A distribution of assets under management or administration and related fiduciary and asset management revenue follows:
Table 3 – Assets Under Management or Administration
(Dollars in thousands)

| Three Months Ended
| March 31, 2024 |  | December 31, 2023 |  | March 31, 2023
| Balance 1 |  | Revenue 2 |  | Margin 3 |  | Balance 1 |  | Revenue 2 |  | Margin 3 |  | Balance 1 |  | Revenue 2 |  | Margin 3
Managed fiduciary assets:
Personal | $ | 11,288,591 |  |  | $ | 27,938 |  |  | 0.99 | % |  | $ | 10,951,951 |  |  | $ | 26,238 |  |  | 0.96 | % |  | $ | 10,609,920 |  |  | $ | 24,839 |  |  | 0.94 | %
Institutional | 19,680,708 |  |  | 11,770 |  |  | 0.24 | % |  | 19,310,826 |  |  | 8,138 |  |  | 0.17 | % |  | 18,683,598 |  |  | 9,223 |  |  | 0.20 | %
Total managed fiduciary assets | 30,969,299 |  |  | 39,708 |  |  | 0.51 | % |  | 30,262,777 |  |  | 34,376 |  |  | 0.45 | % |  | 29,293,518 |  |  | 34,062 |  |  | 0.47 | %
Non-managed assets:
Fiduciary | 29,395,993 |  |  | 12,951 |  |  | 0.18 | % |  | 29,535,915 |  |  | 14,386 |  |  | 0.19 | % |  | 28,164,407 |  |  | 13,785 |  |  | 0.20 | %
Non-fiduciary | 19,384,953 |  |  | 2,646 |  |  | 0.05 | % |  | 19,670,248 |  |  | 2,646 |  |  | 0.05 | % |  | 19,830,593 |  |  | 2,810 |  |  | 0.06 | %
Safekeeping and brokerage assets under administration | 25,780,658 |  |  | — |  |  | — | % |  | 25,268,059 |  |  | — |  |  | — | % |  | 25,021,601 |  |  | — |  |  | — | %
Total non-managed assets | 74,561,604 |  |  | 15,597 |  |  | 0.08 | % |  | 74,474,222 |  |  | 17,032 |  |  | 0.09 | % |  | 73,016,601 |  |  | 16,595 |  |  | 0.09 | %
Total assets under management or administration | $ | 105,530,903 |  |  | $ | 55,305 |  |  | 0.21 | % |  | $ | 104,736,999 |  |  | $ | 51,408 |  |  | 0.20 | % |  | $ | 102,310,119 |  |  | $ | 50,657 |  |  | 0.20 | %

1 Assets under management or administration balance excludes certain assets under custody held by a sub-custodian where minimal revenue is recognized. $20 billion, $19 billion, and $18 billion of such assets are excluded from assets under management or administration at March 31, 2024, December 31, 2023, and March 31, 2023, respectively.
2 Fiduciary and asset management revenue includes asset-based and other fees associated with the assets.
3 Annualized revenue divided by period end balance.

A summary of changes in assets under management or administration for the three months ended March 31, 2024 and 2023 follows:
Table 4 – Changes in Assets Under Management or Administration
(In thousands)

|  | Three Months Ended March 31, |  |
|  | 2024 |  | 2023 |  |  |  |
Beginning balance |  | $ | 104,736,999 |  |  | $ | 99,735,040 |  |  |  |  |
Net outflows |  | (1,963,707) |  |  | (516,918) |  |  |  |  |
Net change in fair value |  | 2,757,611 |  |  | 3,091,997 |  |  |  |  |
Ending balance |  | $ | 105,530,903 |  |  | $ | 102,310,119 |  |  |  |  |

Assets under management as of March 31, 2024 consist of 42% fixed income, 34% equities, 15% cash, and 9% alternative investments.
Deposit Service Charges
Deposit service charges and fees increased $915 thousand or 3% over the fourth quarter of 2023, primarily due to growth in commercial service charges of $1.2 million, partially offset by a decrease in check card fees due to seasonality.
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Mortgage Banking Revenue
Mortgage banking revenue increased $6.1 million to $19.0 million. Mortgage production volume increased $48 million to $172 million. Production revenue as a percentage of production volume, which includes unrealized gains and losses on our mortgage commitment pipeline and related hedges, increased 408 basis points to 2.05%. Margins have also increased as the repooling of COVID-19 forbearance loans we previously repurchased continues to migrate to a lower level than experienced in recent quarters.
Table 5 – Mortgage Banking Revenue
(Dollars in thousands)

|  | Three Months Ended |  | Increase (Decrease) |  | % Increase (Decrease) |  | Three Months Ended Mar. 31, 2023 |  | Increase (Decrease) |  | % Increase (Decrease) |  |  |  |  |  |
|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  |  |  |  |  |  |  |  |  |  |
Mortgage production revenue |  | $ | 3,525 |  |  | $ | (2,535) |  |  | $ | 6,060 |  |  | 239 | % |  | $ | (633) |  |  | $ | 4,158 |  |  | (657) | % |  |  |  |  |  |  |  |
Mortgage loans funded for sale |  | $ | 139,176 |  |  | $ | 139,255 |  |  |  |  |  |  | $ | 138,624 |  |  |  |  |  |  |  |  |  |  |  |  |
Add: Current period end outstanding commitments |  | 67,951 |  |  | 34,783 |  |  |  |  |  |  | 71,693 |  |  |  |  |  |  |  |  |  |  |  |  |
Less: Prior period end outstanding commitments |  | 34,783 |  |  | 49,284 |  |  |  |  |  |  | 45,492 |  |  |  |  |  |  |  |  |  |  |  |  |
Total mortgage production volume |  | $ | 172,344 |  |  | $ | 124,754 |  |  | $ | 47,590 |  |  | 38 | % |  | $ | 164,825 |  |  | $ | 7,519 |  |  | 5 | % |  |  |  |  |  |  |  |
Mortgage loan refinances to mortgage loans funded for sale |  | 10 | % |  | 10 | % |  | — | bps |  |  |  | 9 | % |  | 100 | bps |  |  |  |  |  |  |  |  |  |
Realized margin on funded mortgage loans |  | 1.46 | % |  | (0.98) | % |  | 244 | bps |  |  |  | (1.25) | % |  | 271 | bps |  |  |  |  |  |  |  |  |  |
Production revenue as a percentage of production volume |  | 2.05 | % |  | (2.03) | % |  | 408 | bps |  |  |  | (0.38) | % |  | 243 | bps |  |  |  |  |  |  |  |  |  |
Primary mortgage interest rates: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Average |  | 6.73 | % |  | 7.21 | % |  | (48) | bps |  |  |  | 6.33 | % |  | 40 | bps |  |  |  |  |  |  |  |  |  |
Period end |  | 6.79 | % |  | 6.42 | % |  | 37 | bps |  |  |  | 6.24 | % |  | 55 | bps |  |  |  |  |  |  |  |  |  |
Mortgage servicing revenue |  | $ | 15,442 |  |  | $ | 15,369 |  |  | $ | 73 |  |  | — | % |  | $ | 15,000 |  |  | $ | 442 |  |  | 3 | % |  |  |  |  |  |  |  |
Average outstanding principal balance of mortgage loans serviced for others |  | 21,088,898 |  |  | 20,471,030 |  |  | 617,868 |  |  | 3 | % |  | 21,121,319 |  |  | (32,421) |  |  | — | % |  |  |  |  |  |  |  |
Average mortgage servicing revenue rates |  | 0.29 | % |  | 0.30 | % |  | (1) | bp |  |  |  | 0.29 | % |  | — | bp |  |  |  |  |  |  |  |  |  |

Primary rates disclosed in Table 5 above represent rates generally available to borrowers on 30 year conforming mortgage loans.
Other revenue decreased $2.1 million or 14% compared to the fourth quarter of 2023, largely due to a reduction in fees earned on derivative counterparty margin.
Net gains on other assets, securities and derivatives
Other gains, net, were $4.3 million for the first quarter of 2024 compared to $40.5 million in the fourth quarter of 2023. The prior quarter included a $31.0 million pre-tax gain, before related professional fees, on the sale of BOKFI.
Losses on available for sale securities were $45.2 million in the first quarter of 2024 as we repositioned the available for sale securities portfolio by selling approximately $783 million of lower-yielding debt securities. We expect the gain on conversion of our Visa B shares under the Exchange Offer will offset the realized losses on the repositioning. The Exchange Offer opened on April 8, 2024 and is scheduled to expire at end of day on May 3, 2024. Losses on available for sale securities were $27.6 million in the fourth quarter of 2023 related to repositioning of the securities portfolio, offsetting the gain from the sale of BOKFI.
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As discussed in the Market Risk section following, the fair value of our MSRs changes in response to changes in primary mortgage loan rates and other assumptions. We attempt to mitigate the earnings volatility caused by changes in the fair value of MSRs by designating certain financial instruments as an economic hedge. Changes in the fair value of these instruments are generally expected to partially offset changes in the fair value of MSRs.
Table 6 – Gain (Loss) on Mortgage Servicing Rights
(In thousands)

|  | Three Months Ended
|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  |  |  |  |  | Mar. 31, 2023
Gain (loss) on mortgage hedge derivative contracts, net |  | $ | (9,357) |  |  | $ | 8,275 |  |  |  |  |  |  | $ | (1,711) |
Gain (loss) on fair value option securities, net |  | (305) |  |  | 1,031 |  |  |  |  |  |  | (2,962) |
Gain (loss) on economic hedge of mortgage servicing rights, net |  | (9,662) |  |  | 9,306 |  |  |  |  |  |  | (4,673) |
Gain (loss) on change in fair value of mortgage servicing rights |  | 10,977 |  |  | (14,356) |  |  |  |  |  |  | (6,059) |
Gain (loss) on changes in fair value of mortgage servicing rights, net of economic hedges included in other operating revenue |  | 1,315 |  |  | (5,050) |  |  |  |  |  |  | (10,732) |
Net interest revenue (expense) on fair value option securities 1 |  | (155) |  |  | (101) |  |  |  |  |  |  | 187 |
Total economic cost of changes in the fair value of mortgage servicing rights, net of economic hedges |  | $ | 1,160 |  |  | $ | (5,151) |  |  |  |  |  |  | $ | (10,545) |

1 Actual interest earned on fair value option securities less internal transfer-priced cost of funds.
Other Operating Expense
Other operating expense for the first quarter of 2024 totaled $340.4 million, a decrease of $43.7 million compared to the fourth quarter of 2023. Excluding the impact of the FDIC special assessment, other operating expense decreased $6.4 million. In the fourth quarter of 2023 we recognized $43.8 million of expense related to the FDIC special assessment. During the first quarter of 2024, we received notification from the FDIC that the previous assessed losses attributable to the protection of Silicon Valley Bank and Signature Bank uninsured depositors had increased, so an additional $6.5 million of estimated expense related to the special assessment was recognized.
Our efficiency ratio 1 was 67.13% for the first quarter of 2024, compared to 71.62% in the prior quarter.
1 See Explanation and Reconciliation of Non-GAAP Measures in "Non-GAAP Measures" section following.
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Table 7 – Other Operating Expense
(Dollars in thousands)

|  | Three Months Ended |  | Increase (Decrease) |  | % Increase (Decrease) |  | Three Months Ended Mar. 31, 2023 |  | Increase (Decrease) |  | % Increase (Decrease) |  |  |  |  |  |
|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  |  |  |  |  |  |  |  |  |  |
Regular compensation |  | $ | 113,913 |  |  | $ | 114,435 |  |  | $ | (522) |  |  | — | % |  | $ | 105,118 |  |  | $ | 8,795 |  |  | 8 | % |  |  |  |  |  |  |  |
Incentive compensation: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash-based |  | 49,956 |  |  | 55,163 |  |  | (5,207) |  |  | (9) | % |  | 41,735 |  |  | 8,221 |  |  | 20 | % |  |  |  |  |  |  |  |
Share-based |  | 3,305 |  |  | 2,046 |  |  | 1,259 |  |  | 62 | % |  | 5,257 |  |  | (1,952) |  |  | 37 | % |  |  |  |  |  |  |  |
Deferred compensation |  | 4,450 |  |  | 5,363 |  |  | (913) |  |  | N/A |  | 1,710 |  |  | 2,740 |  |  | N/A |  |  |  |  |  |  |  |
Total incentive compensation |  | 57,711 |  |  | 62,572 |  |  | (4,861) |  |  | (8) | % |  | 48,702 |  |  | 9,009 |  |  | 19 | % |  |  |  |  |  |  |  |
Employee benefits |  | 31,029 |  |  | 26,015 |  |  | 5,014 |  |  | 19 | % |  | 28,325 |  |  | 2,704 |  |  | 10 | % |  |  |  |  |  |  |  |
Total personnel expense |  | 202,653 |  |  | 203,022 |  |  | (369) |  |  | — | % |  | 182,145 |  |  | 20,508 |  |  | 11 | % |  |  |  |  |  |  |  |
Business promotion |  | 7,978 |  |  | 8,629 |  |  | (651) |  |  | (8) | % |  | 8,569 |  |  | (591) |  |  | (7) | % |  |  |  |  |  |  |  |
Charitable contributions to BOKF Foundation |  | — |  |  | 1,542 |  |  | (1,542) |  |  | N/A |  | — |  |  | — |  |  | N/A |  |  |  |  |  |  |  |
Professional fees and services |  | 12,010 |  |  | 16,288 |  |  | (4,278) |  |  | (26) | % |  | 13,048 |  |  | (1,038) |  |  | (8) | % |  |  |  |  |  |  |  |
Net occupancy and equipment |  | 30,293 |  |  | 30,355 |  |  | (62) |  |  | — | % |  | 28,459 |  |  | 1,834 |  |  | 6 | % |  |  |  |  |  |  |  |
FDIC and other insurance |  | 8,740 |  |  | 8,495 |  |  | 245 |  |  | 3 | % |  | 7,315 |  |  | 1,425 |  |  | 19 | % |  |  |  |  |  |  |  |
FDIC special assessment |  | 6,454 |  |  | 43,773 |  |  | (37,319) |  |  | (85) | % |  | — |  |  | 6,454 |  |  | N/A |  |  |  |  |  |  |  |
Data processing and communications |  | 45,564 |  |  | 45,584 |  |  | (20) |  |  | — | % |  | 44,802 |  |  | 762 |  |  | 2 | % |  |  |  |  |  |  |  |
Printing, postage and supplies |  | 3,997 |  |  | 3,844 |  |  | 153 |  |  | 4 | % |  | 3,893 |  |  | 104 |  |  | 3 | % |  |  |  |  |  |  |  |
Amortization of intangible assets |  | 3,003 |  |  | 3,543 |  |  | (540) |  |  | (15) | % |  | 3,391 |  |  | (388) |  |  | (11) | % |  |  |  |  |  |  |  |
Mortgage banking costs |  | 6,355 |  |  | 8,085 |  |  | (1,730) |  |  | (21) | % |  | 5,782 |  |  | 573 |  |  | 10 | % |  |  |  |  |  |  |  |
Other expense |  | 13,337 |  |  | 10,923 |  |  | 2,414 |  |  | 22 | % |  | 8,408 |  |  | 4,929 |  |  | 59 | % |  |  |  |  |  |  |  |
Total other operating expense |  | $ | 340,384 |  |  | $ | 384,083 |  |  | $ | (43,699) |  |  | (11) | % |  | $ | 305,812 |  |  | $ | 34,572 |  |  | 11 | % |  |  |  |  |  |  |  |
Average number of employees (full-time equivalent) |  | 4,936 |  |  | 4,938 |  |  | (2) |  |  | — | % |  | 4,796 |  |  | 140 |  |  | 3 | % |  |  |  |  |  |  |  |

Certain percentage increases (decreases) are not meaningful for comparison purposes.
Personnel expense
Personnel expense was largely unchanged compared to the fourth quarter of 2023. Cash-based incentive compensation decreased $5.2 million, driven by seasonally elevated incentive compensation in the fourth quarter. Share-based compensation was up $1.3 million reflecting changes in assumptions of certain performance-based equity awards. Regular compensation and deferred compensation, which is offset by changes in the fair value of deferred compensation investments, both remained relatively unchanged compared to the prior quarter. Employee benefits expense increased $5.0 million, primarily due to seasonally higher payroll taxes.
Non-personnel operating expense
Excluding the FDIC special assessment, non-personnel expense was $131.3 million, a decrease of $6.0 million. Professional fees and services expense decreased $4.3 million. The previous quarter included $2.2 million in expenses related to the sale of BOKFI. Mortgage banking costs decreased $1.7 million, primarily due to accruals related to default servicing and loss mitigation costs on loans serviced for others. We also made a $1.5 million contribution to the BOKF Foundation in the fourth quarter, which did not reoccur in the first quarter. Other expense increased $2.4 million, primarily due to increased operational losses.
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Income Taxes
The effective tax rate was 21.70% for the first quarter of 2024, 25.97% for the fourth quarter of 2023 and 22.03% for the first quarter of 2023. The fourth quarter of 2023 included an acceleration of $3.1 million of tax expense as a result of exiting three low income housing tax credit investments. When compared to the first quarter of 2023, the effective tax rate also decreased due to lower forecasted and actual pre-tax income.
Lines of Business
We operate three principal lines of business: Commercial Banking, Consumer Banking and Wealth Management. Commercial Banking includes lending, treasury and cash management services and customer risk management products for small businesses, middle market and larger commercial customers. Commercial Banking also includes the TransFund EFT network. Consumer Banking includes retail lending and deposit services, lending and deposit services to small business customers served through our consumer branch network and all mortgage banking activities. Wealth Management provides fiduciary services, private banking services, insurance and investment advisory services in all markets. Wealth Management also underwrites state and municipal securities and engages in brokerage and trading activities.
In addition to our lines of business, we have a Funds Management unit. The primary purpose of this unit is to manage our overall liquidity needs and interest rate risk. Each line of business borrows funds from and provides funds to the Funds Management unit as needed to support their operations. Operating results for Funds Management and other include the effect of interest rate risk positions and risk management activities, securities gains and losses including impairment charges, the provision for credit losses in excess of net loans charged off, tax planning strategies and certain executive compensation costs that are not attributed to the lines of business. The Funds Management unit also initially recognizes accruals for loss contingencies when losses become probable. Actual losses are recognized by the lines of business if the accruals are settled.
We allocate resources and evaluate the performance of our lines of business using the net direct contribution, which includes the allocation of funds and capital costs. Credit costs are attributed to the lines of business based on net loans charged off or recovered. The difference between credit costs attributed to the lines of business and the consolidated provision for credit losses is attributed to Funds Management. In addition, we measure the performance of our business lines after allocations of certain indirect expenses and taxes based on statutory rates.
Net interest income in our lines of business reflects our internal funds transfer pricing methodology. The funds transfer pricing methodology is the process by which the Company allocates interest income and expense to the lines of business and transfers the primary interest rate risk and liquidity risk to the Funds Management unit. The funds transfer pricing methodology considers the interest rate and liquidity risk characteristics of assets and liabilities. Periodically, the methodology and assumptions utilized in transfer pricing are adjusted to reflect economic conditions and other factors, which may impact the allocation of net interest income to the lines of business.
Economic capital is assigned to the business units by a capital allocation model that reflects management's assessment of risk. This model assigns capital based upon credit, operating, interest rate and other market risk inherent in our business lines and recognizes the diversification benefits among the units. The level of assigned economic capital is a combination of the risk taken by each business line based on its actual exposures and calibrated to its own loss history where possible. Average invested capital includes economic capital and amounts we have invested in the lines of business.
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As shown in Table 8, net income attributable to our lines of business decreased $46.2 million or 9% compared to the fourth quarter of 2023. Net interest revenue decreased $36.5 million largely as a result of deposit repricing activity. Operating revenue decreased $37.4 million as the prior quarter included a pre-tax gain of $31.0 million, before related professional fees, on the sale of BOKFI. Operating expense decreased $10.2 million compared to the fourth quarter of 2023 with a $7.9 million decrease in personnel expense and a $2.2 million decrease in non-personnel expense.
Table 8 – Net Income by Line of Business
(Dollars in thousands)

|  | Three Months Ended |  | Increase (Decrease) |  | % Increase (Decrease) |  | Three Months Ended Mar. 31, 2023 |  | Increase (Decrease) |  | % Increase (Decrease) |  |  |  |  |  |
|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  |  |  |  |  |  |  |  |  |  |
Commercial Banking |  | $ | 153,250 |  |  | $ | 171,084 |  |  | $ | (17,834) |  |  | (10) | % |  | $ | 190,231 |  |  | $ | (36,981) |  |  | (19) | % |  |  |  |  |  |  |  |
Consumer Banking |  | 53,804 |  |  | 53,695 |  |  | 109 |  |  | — | % |  | 50,683 |  |  | 3,121 |  |  | 6 | % |  |  |  |  |  |  |  |
Wealth Management |  | 34,165 |  |  | 62,690 |  |  | (28,525) |  |  | (46) | % |  | 52,447 |  |  | (18,282) |  |  | (35) | % |  |  |  |  |  |  |  |
Subtotal |  | 241,219 |  |  | 287,469 |  |  | (46,250) |  |  | (16) | % |  | 293,361 |  |  | (52,142) |  |  | (18) | % |  |  |  |  |  |  |  |
Funds Management and other |  | (157,516) |  |  | (204,894) |  |  | 47,378 |  |  | N/A |  | (130,993) |  |  | (26,523) |  |  | N/A |  |  |  |  |  |  |  |
Total |  | $ | 83,703 |  |  | $ | 82,575 |  |  | $ | 1,128 |  |  | 1 | % |  | $ | 162,368 |  |  | $ | (78,665) |  |  | (48) | % |  |  |  |  |  |  |  |

Certain percentage increases (decreases) in non-fees and commissions revenue are not meaningful for comparison purposes based on the nature of the item.
- 13 -

Commercial Banking
Commercial Banking contributed $153.3 million to consolidated net income in the first quarter of 2024, a decrease of $17.8 million or 10% compared to the fourth quarter of 2023.
Table 9 – Commercial Banking
(Dollars in thousands)

|  | Three Months Ended |  | Increase (Decrease) |  | % Increase (Decrease) |  | Three Months Ended Mar. 31, 2023 |  | Increase (Decrease) |  | % Increase (Decrease) |  |  |  |  |  |
|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  |  |  |  |  |  |  |  |  |  |
Net interest revenue from external sources |  | $ | 282,447 |  |  | $ | 292,499 |  |  | $ | (10,052) |  |  | (3) | % |  | $ | 287,988 |  |  | $ | (5,541) |  |  | (2) | % |  |  |  |  |  |  |  |
Net interest expense from internal sources |  | (37,326) |  |  | (24,620) |  |  | (12,706) |  |  | (52) | % |  | (3,932) |  |  | (33,394) |  |  | (849) | % |  |  |  |  |  |  |  |
Total net interest revenue |  | 245,121 |  |  | 267,879 |  |  | (22,758) |  |  | (8) | % |  | 284,056 |  |  | (38,935) |  |  | (14) | % |  |  |  |  |  |  |  |
Net loans charged off |  | 4,160 |  |  | 2,987 |  |  | 1,173 |  |  | 39 | % |  | 76 |  |  | 4,084 |  |  | 5,374 | % |  |  |  |  |  |  |  |
Net interest revenue after net loans charged off |  | 240,961 |  |  | 264,892 |  |  | (23,931) |  |  | (9) | % |  | 283,980 |  |  | (43,019) |  |  | (15) | % |  |  |  |  |  |  |  |
Fees and commissions revenue |  | 50,630 |  |  | 60,937 |  |  | (10,307) |  |  | (17) | % |  | 55,835 |  |  | (5,205) |  |  | (9) | % |  |  |  |  |  |  |  |
Other gains (losses), net |  | (624) |  |  | 462 |  |  | (1,086) |  |  | (235) | % |  | 1,010 |  |  | (1,634) |  |  | (162) | % |  |  |  |  |  |  |  |
Other operating revenue |  | 50,006 |  |  | 61,399 |  |  | (11,393) |  |  | (19) | % |  | 56,845 |  |  | (6,839) |  |  | (12) | % |  |  |  |  |  |  |  |
Personnel expense |  | 45,319 |  |  | 53,066 |  |  | (7,747) |  |  | (15) | % |  | 42,747 |  |  | 2,572 |  |  | 6 | % |  |  |  |  |  |  |  |
Non-personnel expense |  | 24,776 |  |  | 28,833 |  |  | (4,057) |  |  | (14) | % |  | 30,387 |  |  | (5,611) |  |  | (18) | % |  |  |  |  |  |  |  |
Other operating expense |  | 70,095 |  |  | 81,899 |  |  | (11,804) |  |  | (14) | % |  | 73,134 |  |  | (3,039) |  |  | (4) | % |  |  |  |  |  |  |  |
Net direct contribution |  | 220,872 |  |  | 244,392 |  |  | (23,520) |  |  | (10) | % |  | 267,691 |  |  | (46,819) |  |  | (17) | % |  |  |  |  |  |  |  |
Gain (loss) on financial instruments, net |  | 167 |  |  | 216 |  |  | (49) |  |  | N/A |  | (58) |  |  | 225 |  |  | N/A |  |  |  |  |  |  |  |
Gain (loss) on repossessed assets, net |  | — |  |  | (601) |  |  | 601 |  |  | N/A |  | 859 |  |  | (859) |  |  | N/A |  |  |  |  |  |  |  |
Corporate expense allocations |  | 18,397 |  |  | 18,040 |  |  | 357 |  |  | 2 | % |  | 17,718 |  |  | 679 |  |  | 4 | % |  |  |  |  |  |  |  |
Income before taxes |  | 202,642 |  |  | 225,967 |  |  | (23,325) |  |  | (10) | % |  | 250,774 |  |  | (48,132) |  |  | (19) | % |  |  |  |  |  |  |  |
Federal and state income tax |  | 49,392 |  |  | 54,883 |  |  | (5,491) |  |  | (10) | % |  | 60,543 |  |  | (11,151) |  |  | (18) | % |  |  |  |  |  |  |  |
Net income |  | $ | 153,250 |  |  | $ | 171,084 |  |  | $ | (17,834) |  |  | (10) | % |  | $ | 190,231 |  |  | $ | (36,981) |  |  | (19) | % |  |  |  |  |  |  |  |
Average assets |  | $ | 29,806,817 |  |  | $ | 29,346,459 |  |  | $ | 460,358 |  |  | 2 | % |  | $ | 28,162,934 |  |  | $ | 1,643,883 |  |  | 6 | % |  |  |  |  |  |  |  |
Average loans |  | 20,067,170 |  |  | 19,928,602 |  |  | 138,568 |  |  | 1 | % |  | 18,750,426 |  |  | 1,316,744 |  |  | 7 | % |  |  |  |  |  |  |  |
Average deposits |  | 15,730,241 |  |  | 15,493,326 |  |  | 236,915 |  |  | 2 | % |  | 15,861,285 |  |  | (131,044) |  |  | (1) | % |  |  |  |  |  |  |  |
Average invested capital |  | 2,176,950 |  |  | 2,187,780 |  |  | (10,830) |  |  | — | % |  | 2,133,459 |  |  | 43,491 |  |  | 2 | % |  |  |  |  |  |  |  |

Certain percentage increases (decreases) in non-fees and commissions revenue are not meaningful for comparison purposes based on the nature of the item.
Net interest revenue decreased $22.8 million or 8% compared to the fourth quarter of 2023, primarily due to a shift in deposit balances from demand to interest-bearing accounts along with decreased spreads from a change in market conditions. Net loans charged-off were $4.2 million in the first quarter of 2024 compared to $3.0 million in the fourth quarter of 2023.
Fees and commissions revenue decreased $10.3 million or 17%. Customer hedging revenue decreased $2.8 million due to a reduction in customer energy hedging, and transaction card revenue decreased $3.4 million following elevated fourth quarter transaction activity. Other revenue decreased $3.7 million, largely due to a reduction in fees earned on derivative counterparty margin. Operating expense decreased $11.8 million or 14% compared to the fourth quarter of 2023. Personnel expense decreased $7.7 million or 15%, largely driven by lower incentive compensation costs. Non-personnel expense decreased $4.1 million or 14% due to a decline in other expense and professional fees.
- 14 -

Average outstanding balance of loans attributed to Commercial Banking increased $139 million or 1% over the fourth quarter of 2023 to $20.1 billion. See the Loans section of Management's Discussion and Analysis of Financial Condition following for additional discussion of changes in commercial and commercial real estate loans, which are primarily attributed to the Commercial Banking segment.
Average deposits attributed to Commercial Banking increased $237 million or 2% over the fourth quarter of 2023 to $15.7 billion. See Management's Discussion and Analysis of Financial Condition and Results of Operations – Liquidity and Capital for further discussion of changes.
Consumer Banking
Consumer Banking provides retail banking services through four primary distribution channels: traditional branches, the 24-hour ExpressBank call center, internet banking and mobile banking. Consumer Banking also conducts mortgage banking activities through offices located outside of our Consumer Banking markets.
Consumer Banking contributed $53.8 million to consolidated net income for the first quarter of 2024, consistent with the prior quarter.
- 15 -

Table 10 – Consumer Banking
(Dollars in thousands)

|  | Three Months Ended |  | Increase (Decrease) |  | % Increase (Decrease) |  | Three Months Ended Mar. 31, 2023 |  | Increase (Decrease) |  | % Increase (Decrease) |  |  |  |  |  |
|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  |  |  |  |  |  |  |  |  |  |
Net interest revenue from external sources |  | $ | 7,350 |  |  | $ | 9,625 |  |  | $ | (2,275) |  |  | (24) | % |  | $ | 21,146 |  |  | $ | (13,796) |  |  | (65) | % |  |  |  |  |  |  |  |
Net interest revenue from internal sources |  | 94,799 |  |  | 104,771 |  |  | (9,972) |  |  | (10) | % |  | 88,235 |  |  | 6,564 |  |  | 7 | % |  |  |  |  |  |  |  |
Total net interest revenue |  | 102,149 |  |  | 114,396 |  |  | (12,247) |  |  | (11) | % |  | 109,381 |  |  | (7,232) |  |  | (7) | % |  |  |  |  |  |  |  |
Net loans charged off |  | 1,808 |  |  | 1,443 |  |  | 365 |  |  | 25 | % |  | 1,184 |  |  | 624 |  |  | 53 | % |  |  |  |  |  |  |  |
Net interest revenue after net loans charged off |  | 100,341 |  |  | 112,953 |  |  | (12,612) |  |  | (11) | % |  | 108,197 |  |  | (7,856) |  |  | (7) | % |  |  |  |  |  |  |  |
Fees and commissions revenue |  | 36,207 |  |  | 30,075 |  |  | 6,132 |  |  | 20 | % |  | 30,581 |  |  | 5,626 |  |  | 18 | % |  |  |  |  |  |  |  |
Other gains, net |  | — |  |  | — |  |  | — |  |  | N/A |  | 29 |  |  | (29) |  |  | (100) | % |  |  |  |  |  |  |  |
Other operating revenue |  | 36,207 |  |  | 30,075 |  |  | 6,132 |  |  | 20 | % |  | 30,610 |  |  | 5,597 |  |  | 18 | % |  |  |  |  |  |  |  |
Personnel expense |  | 25,236 |  |  | 23,051 |  |  | 2,185 |  |  | 9 | % |  | 21,362 |  |  | 3,874 |  |  | 18 | % |  |  |  |  |  |  |  |
Non-personnel expense |  | 28,211 |  |  | 32,028 |  |  | (3,817) |  |  | (12) | % |  | 28,836 |  |  | (625) |  |  | (2) | % |  |  |  |  |  |  |  |
Total other operating expense |  | 53,447 |  |  | 55,079 |  |  | (1,632) |  |  | (3) | % |  | 50,198 |  |  | 3,249 |  |  | 6 | % |  |  |  |  |  |  |  |
Net direct contribution |  | 83,101 |  |  | 87,949 |  |  | (4,848) |  |  | (6) | % |  | 88,609 |  |  | (5,508) |  |  | (6) | % |  |  |  |  |  |  |  |
Gain (loss) on financial instruments, net |  | (9,663) |  |  | 9,307 |  |  | (18,970) |  |  | N/A |  | (4,673) |  |  | (4,990) |  |  | N/A |  |  |  |  |  |  |  |
Change in fair value of mortgage servicing rights |  | 10,977 |  |  | (14,356) |  |  | 25,333 |  |  | N/A |  | (6,059) |  |  | 17,036 |  |  | N/A |  |  |  |  |  |  |  |
Gain on repossessed assets, net |  | 107 |  |  | 11 |  |  | 96 |  |  | 873 | % |  | 14 |  |  | 93 |  |  | 664 | % |  |  |  |  |  |  |  |
Corporate expense allocations |  | 14,172 |  |  | 12,705 |  |  | 1,467 |  |  | 12 | % |  | 11,622 |  |  | 2,550 |  |  | 22 | % |  |  |  |  |  |  |  |
Income before taxes |  | 70,350 |  |  | 70,206 |  |  | 144 |  |  | — | % |  | 66,269 |  |  | 4,081 |  |  | 6 | % |  |  |  |  |  |  |  |
Federal and state income tax |  | 16,546 |  |  | 16,511 |  |  | 35 |  |  | — | % |  | 15,586 |  |  | 960 |  |  | 6 | % |  |  |  |  |  |  |  |
Net income |  | $ | 53,804 |  |  | $ | 53,695 |  |  | $ | 109 |  |  | — | % |  | $ | 50,683 |  |  | $ | 3,121 |  |  | 6 | % |  |  |  |  |  |  |  |
Average assets |  | $ | 9,391,981 |  |  | $ | 9,342,840 |  |  | $ | 49,141 |  |  | 1 | % |  | $ | 9,934,511 |  |  | $ | (542,530) |  |  | (5) | % |  |  |  |  |  |  |  |
Average loans |  | 1,913,586 |  |  | 1,877,303 |  |  | 36,283 |  |  | 2 | % |  | 1,747,237 |  |  | 166,349 |  |  | 10 | % |  |  |  |  |  |  |  |
Average deposits |  | 7,901,167 |  |  | 7,890,032 |  |  | 11,135 |  |  | — | % |  | 8,248,541 |  |  | (347,374) |  |  | (4) | % |  |  |  |  |  |  |  |
Average invested capital |  | 295,202 |  |  | 291,705 |  |  | 3,497 |  |  | 1 | % |  | 261,485 |  |  | 33,717 |  |  | 13 | % |  |  |  |  |  |  |  |

Certain percentage increases (decreases) in non-fees and commissions revenue are not meaningful for comparison purposes based on the nature of the item.
Net interest revenue from Consumer Banking activities decreased by $12.2 million or 11%, largely due to increased customer demand for time deposits and a reduction in deposit spreads from a change in market conditions.
Operating revenue increased $6.1 million or 20% driven by growth in mortgage banking revenue. Mortgage production volume increased $48 million to $172 million. Operating expense decreased $1.6 million or 3%, which was largely offset by an increase in corporate expense allocations.
The net benefit of the changes in the fair value of mortgage servicing rights and related economic hedges was $1.2 million compared to a net cost of $5.2 million for the fourth quarter of 2023.
Average loans increased $36 million or 2% to $1.9 billion over the previous quarter. Average deposits attributed to the Consumer Banking segment were mostly unchanged from the previous quarter. See Management's Discussion and Analysis of Financial Condition and Results of Operations – Liquidity and Capital for further discussion of the changes.
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Wealth Management
Wealth Management contributed $34.2 million to consolidated net income in the first quarter of 2024, a decrease of $28.5 million or 46% compared to the fourth quarter of 2023. The prior quarter included a pre-tax gain of $31.0 million, before related professional fees, on the sale of BOKFI.
Table 11 – Wealth Management
(Dollars in thousands)

|  | Three Months Ended |  | Increase (Decrease) |  | % Increase (Decrease) |  | Three Months Ended Mar. 31, 2023 |  | Increase (Decrease) |  | % Increase (Decrease) |  |  |  |  |  |
|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  |  |  |  |  |  |  |  |  |  |
Net interest revenue from external sources |  | $ | 6,999 |  |  | $ | 6,221 |  |  | $ | 778 |  |  | 13 | % |  | $ | 20,940 |  |  | $ | (13,941) |  |  | (67) | % |  |  |  |  |  |  |  |
Net interest revenue from internal sources |  | 33,110 |  |  | 35,422 |  |  | (2,312) |  |  | (7) | % |  | 33,166 |  |  | (56) |  |  | — | % |  |  |  |  |  |  |  |
Total net interest revenue |  | 40,109 |  |  | 41,643 |  |  | (1,534) |  |  | (4) | % |  | 54,106 |  |  | (13,997) |  |  | (26) | % |  |  |  |  |  |  |  |
Net loans charged off (recovered) |  | (15) |  |  | 10 |  |  | (25) |  |  | (250) | % |  | (24) |  |  | 9 |  |  | 38 | % |  |  |  |  |  |  |  |
Net interest revenue after net loans charged off (recovered) |  | 40,124 |  |  | 41,633 |  |  | (1,509) |  |  | (4) | % |  | 54,130 |  |  | (14,006) |  |  | (26) | % |  |  |  |  |  |  |  |
Fees and commissions revenue |  | 118,704 |  |  | 119,872 |  |  | (1,168) |  |  | (1) | % |  | 108,911 |  |  | 9,793 |  |  | 9 | % |  |  |  |  |  |  |  |
Other gains, net |  | — |  |  | 31,007 |  |  | (31,007) |  |  | (100) | % |  | — |  |  | — |  |  | N/A |  |  |  |  |  |  |  |
Other operating revenue |  | 118,704 |  |  | 150,879 |  |  | (32,175) |  |  | (21) | % |  | 108,911 |  |  | 9,793 |  |  | 9 | % |  |  |  |  |  |  |  |
Personnel expense |  | 63,777 |  |  | 66,151 |  |  | (2,374) |  |  | (4) | % |  | 59,524 |  |  | 4,253 |  |  | 7 | % |  |  |  |  |  |  |  |
Non-personnel expense |  | 35,758 |  |  | 30,124 |  |  | 5,634 |  |  | 19 | % |  | 22,515 |  |  | 13,243 |  |  | 59 | % |  |  |  |  |  |  |  |
Other operating expense |  | 99,535 |  |  | 96,275 |  |  | 3,260 |  |  | 3 | % |  | 82,039 |  |  | 17,496 |  |  | 21 | % |  |  |  |  |  |  |  |
Net direct contribution |  | 59,293 |  |  | 96,237 |  |  | (36,944) |  |  | (38) | % |  | 81,002 |  |  | (21,709) |  |  | (27) | % |  |  |  |  |  |  |  |
Corporate expense allocations |  | 14,558 |  |  | 14,198 |  |  | 360 |  |  | 3 | % |  | 12,360 |  |  | 2,198 |  |  | 18 | % |  |  |  |  |  |  |  |
Income before taxes |  | 44,735 |  |  | 82,039 |  |  | (37,304) |  |  | (45) | % |  | 68,642 |  |  | (23,907) |  |  | (35) | % |  |  |  |  |  |  |  |
Federal and state income tax |  | 10,570 |  |  | 19,349 |  |  | (8,779) |  |  | (45) | % |  | 16,195 |  |  | (5,625) |  |  | (35) | % |  |  |  |  |  |  |  |
Net income |  | $ | 34,165 |  |  | $ | 62,690 |  |  | $ | (28,525) |  |  | (46) | % |  | $ | 52,447 |  |  | $ | (18,282) |  |  | (35) | % |  |  |  |  |  |  |  |
Average assets |  | $ | 15,759,328 |  |  | $ | 14,879,450 |  |  | $ | 879,878 |  |  | 6 | % |  | $ | 11,663,096 |  |  | $ | 4,096,232 |  |  | 35 | % |  |  |  |  |  |  |  |
Average loans |  | 2,198,803 |  |  | 2,154,416 |  |  | 44,387 |  |  | 2 | % |  | 2,201,622 |  |  | (2,819) |  |  | — | % |  |  |  |  |  |  |  |
Average deposits |  | 9,237,965 |  |  | 8,085,643 |  |  | 1,152,322 |  |  | 14 | % |  | 7,432,413 |  |  | 1,805,552 |  |  | 24 | % |  |  |  |  |  |  |  |
Average invested capital |  | 323,172 |  |  | 333,179 |  |  | (10,007) |  |  | (3) | % |  | 290,369 |  |  | 32,803 |  |  | 11 | % |  |  |  |  |  |  |  |

Certain percentage increases (decreases) in non-fees and commissions revenue are not meaningful for comparison purposes based on the nature of the item.
Combined net interest revenue and fee revenue decreased $2.7 million or 2% compared to the fourth quarter of 2023, largely due to declining spreads on deposits. Total revenue from institutional trading activities increased $1.4 million, primarily in U.S. government residential mortgage-backed securities trading activity. Other revenue decreased $8.2 million due to a reduction in customer hedging margin fees. Operating expense increased $3.3 million or 3% compared to the prior quarter. Personnel expense decreased $2.4 million as the prior quarter included transaction related employee costs on the sale of BOKFI. Non-personnel expense increased $5.6 million, primarily due to an increased level of operational losses, partially offset by a $2.7 million decrease in professional fees. Corporate expense allocations were consistent with the previous quarter.
Average outstanding loans attributed to the Wealth Management segment increased $44 million or 2% to $2.2 billion. Average Wealth Management deposits increased $1.2 billion or 14% to $9.2 billion. See Management's Discussion and Analysis of Financial Condition and Results of Operations – Liquidity and Capital for further discussion of the changes.
- 17 -

Financial Condition
Securities
We maintain a securities portfolio to enhance profitability, manage interest rate risk, provide liquidity and comply with regulatory requirements. Securities are classified as trading, held for investment, or available for sale. See Note 2 to the Consolidated Financial Statements for the composition of the securities portfolio as of March 31, 2024 and December 31, 2023.
We hold an inventory of trading securities in support of sales to a variety of customers, including banks, corporations, insurance companies, money managers and others. Trading securities increased $248 million to $5.4 billion during the first quarter of 2024. As discussed in the Market Risk section of this report, trading activities involve risk of loss from adverse price movement. We mitigate this risk within board-approved limits through the use of derivative contracts, short-sales and other techniques.
At March 31, 2024, the carrying value of investment (held-to-maturity) securities was $2.2 billion, including a $299 thousand allowance for expected credit losses, compared to $2.2 billion at December 31, 2023 with a $336 thousand allowance for expected credit losses. The fair value of investment securities was $2.0 billion at March 31, 2024, a $73 million decrease compared to the prior quarter. Investment securities consist primarily of residential mortgage-backed securities issued by U.S. government agencies, intermediate and long-term, fixed-rate Oklahoma and Texas municipal bonds, and taxable Texas school construction bonds.
Available for sale securities, which may be sold prior to maturity, are carried at fair value. Unrealized gains or losses, net of deferred taxes, are recorded as accumulated other comprehensive income in shareholders' equity. The amortized cost of available for sale securities totaled $13.3 billion at March 31, 2024, a $393 million increase compared to December 31, 2023. At March 31, 2024, the available for sale securities portfolio consisted primarily of U.S. government agency residential mortgage-backed securities and U.S. government agency commercial mortgage-backed securities. Both residential and commercial mortgage-backed securities have credit risk from delinquency or default of the underlying loans. We mitigate this risk by primarily investing in securities issued by U.S. government agencies. Principal and interest payments on the underlying loans are fully guaranteed. Commercial mortgage-backed securities have prepayment penalties similar to commercial loans.
A primary risk of holding residential mortgage-backed securities comes from extension during periods of rising interest rates or contraction in the form of more rapid prepayments during periods of falling interest rates. We evaluate this risk through extensive modeling of risk both before making an investment and throughout the life of the security. Our best estimate of the duration of the combined residential mortgage-backed securities portfolio held in investment and available for sale securities was 3.4 years as of March 31, 2024, consistent with the measure as of December 31, 2023. Management estimates the duration extends to 4.0 years assuming an immediate 200 basis point upward shock. The estimated duration contracts to 2.4 years assuming a 200 basis point decline in the current rate environment. The duration of the total investment portfolio is 3.2 years, extends to 3.6 years in an upward shock of 200 basis points, and contracts to 2.6 years in a down 200 basis point shock scenario. Management also regularly monitors the impact of interest rate risk on the available for sale securities portfolio on our tangible equity ratio under various shock scenarios.
At March 31, 2024, we hold 252,233 non-transferable Class B-1 (formerly Class B) shares of Visa, Inc. in connection with a restructuring and public offering by Visa U.S.A. As a member of Visa U.S.A., we received the Class B shares based on our interest in Visa U.S.A. On January 23, 2024, Visa, Inc. stockholders approved the Exchange Offer which provides holders of Class B-1 shares an option to convert up to 50% of its Class B-1 shares to Visa Class C shares and subsequently to freely transferable Visa Class A common shares subject to certain restrictions and holding period requirements. The Exchange Offer opened on April 8, 2024 and is scheduled to expire at the end of the day on May 3, 2024. The Company tendered its Class B-1 Visa shares under the Exchange Offer and expects to monetize up to 50% of the Class B-1 shares. The per share closing price of a Visa Class A common share was $279.08 at March 31, 2024. In light of uncertainties associated with certain ongoing litigation matters involving Visa and the timing and outcome of the aforementioned proposal, the ultimate impact of this gain contingency is unknown.
- 18 -

Bank-Owned Life Insurance
We have approximately $410 million of bank-owned life insurance at March 31, 2024. This investment is expected to provide a long-term source of earnings to support existing employee benefit programs. Approximately $316 million is held in separate accounts and $95 million represents the cash surrender value of policies held in general accounts and other amounts due from various insurance companies. Our separate account holdings are invested in diversified portfolios of investment-grade fixed income securities and cash equivalents, including U.S. Treasury and agency securities, residential mortgage-backed securities, corporate debt, asset-backed and commercial mortgage-backed securities. The portfolios are managed by unaffiliated professional managers within parameters established in the portfolio's investment guidelines. The cash surrender value of certain life insurance policies is further supported by a stable value wrap, which protects against changes in the fair value of the investments. As of March 31, 2024, the fair value of investments held in separate accounts covered by the stable value wrap was approximately $287 million. Since the underlying fair value of the investments held in separate accounts at March 31, 2024 was below the net book value of the investments, $27 million of cash surrender value was supported by the stable value wrap. The remaining $2 million of fair value held in separate accounts is not supported by the stable value wrap. The stable value wrap is provided by an investment grade financial institution.
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Loans
The aggregate loan portfolio before allowance for loan losses totaled $24.2 billion at March 31, 2024, growing $268 million over December 31, 2023, largely due to growth in commercial loans, partially offset by a reduction in commercial real estate loans.
Table 12 – Loans
(In thousands)

|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  | Sep. 30, 2023 |  | June 30, 2023 |  | Mar. 31, 2023
Commercial: |  |  |  |  |  |  |  |  |  |
Healthcare |  | $ | 4,245,939 |  |  | $ | 4,143,233 |  |  | $ | 4,083,134 |  |  | $ | 3,991,387 |  |  | $ | 3,899,341 |
Services |  | 3,529,421 |  |  | 3,576,223 |  |  | 3,566,361 |  |  | 3,585,169 |  |  | 3,563,702 |
Energy |  | 3,443,719 |  |  | 3,437,101 |  |  | 3,490,602 |  |  | 3,508,752 |  |  | 3,398,057 |
General business |  | 3,913,788 |  |  | 3,647,212 |  |  | 3,579,742 |  |  | 3,449,208 |  |  | 3,356,249 |
Total commercial |  | 15,132,867 |  |  | 14,803,769 |  |  | 14,719,839 |  |  | 14,534,516 |  |  | 14,217,349 |
Commercial real estate: |  |  |  |  |  |  |  |  |  |
Multifamily |  | 1,960,839 |  |  | 1,872,760 |  |  | 1,734,688 |  |  | 1,502,971 |  |  | 1,363,881 |
Industrial |  | 1,343,970 |  |  | 1,475,165 |  |  | 1,432,629 |  |  | 1,349,709 |  |  | 1,309,435 |
Office |  | 901,105 |  |  | 909,442 |  |  | 981,876 |  |  | 1,005,660 |  |  | 1,045,700 |
Retail |  | 543,735 |  |  | 592,632 |  |  | 608,073 |  |  | 617,886 |  |  | 618,264 |
Residential construction and land development |  | 83,906 |  |  | 95,052 |  |  | 100,465 |  |  | 106,370 |  |  | 102,828 |
Other commercial real estate |  | 403,122 |  |  | 392,596 |  |  | 383,569 |  |  | 388,205 |  |  | 375,208 |
Total commercial real estate |  | 5,236,677 |  |  | 5,337,647 |  |  | 5,241,300 |  |  | 4,970,801 |  |  | 4,815,316 |
Loans to individuals: |  |  |  |  |  |  |  |  |  |
Residential mortgage |  | 2,192,584 |  |  | 2,160,640 |  |  | 2,090,992 |  |  | 1,993,690 |  |  | 1,926,027 |
Residential mortgage guaranteed by U.S. government agencies |  | 139,456 |  |  | 149,807 |  |  | 161,092 |  |  | 186,170 |  |  | 224,753 |
Personal |  | 1,470,976 |  |  | 1,453,105 |  |  | 1,510,795 |  |  | 1,552,482 |  |  | 1,566,608 |
Total loans to individuals |  | 3,803,016 |  |  | 3,763,552 |  |  | 3,762,879 |  |  | 3,732,342 |  |  | 3,717,388 |
Total |  | $ | 24,172,560 |  |  | $ | 23,904,968 |  |  | $ | 23,724,018 |  |  | $ | 23,237,659 |  |  | $ | 22,750,053 |

Commercial
Commercial loans represent loans for working capital, facilities acquisition or expansion, purchases of equipment and other needs of commercial customers primarily located within our geographical footprint. These loans are underwritten individually and represent ongoing relationships based on a thorough knowledge of the customer, the customer's industry and market. While commercial loans are generally secured by the customer's assets including real property, inventory, accounts receivable, operating equipment, interests in mineral rights and other property and may also include personal guarantees of the owners and related parties, the primary source of repayment of the loans is the ongoing cash flow from operations of the customer's business. In addition, revolving lines of credit are generally governed by a borrowing base. Inherent lending risks are centrally monitored on a continuous basis from underwriting throughout the life of the loan for compliance with commercial lending policies.
Commercial loans totaled $15.1 billion or 63% of the loan portfolio at March 31, 2024, a $329 million increase over December 31, 2023, primarily due to growth in general business and healthcare loans.
- 20 -

Approximately 70% of loans in this segment are located within our geographic footprint based on collateral location. Loans for which the collateral location is less relevant, such as unsecured loans and reserve-based energy loans, are categorized by the borrower's primary operating location. The largest concentration of loans in this segment outside of our footprint is California, totaling 5% of the segment.
Supporting the energy industry with loans to producers and other energy-related entities has been a hallmark of the Company since its founding and represents a large portion of our commercial loan portfolio. In addition, energy production and related industries have a significant impact on the economy in our primary markets. Loans collateralized by oil and gas properties are subject to a semi-annual engineering review by our internal staff of petroleum engineers. This review is used as the basis for developing the expected cash flows supporting the loan amount. The projected cash flows are discounted according to risk characteristics of the underlying oil and gas properties. Loans are evaluated to demonstrate with reasonable certainty that crude oil, natural gas and natural gas liquids can be recovered from known oil and gas reservoirs under existing economic and operating conditions at current pricing levels and with existing conventional equipment and operating methods and costs. As part of our evaluation of credit quality, we analyze rigorous stress tests over a range of commodity prices and take proactive steps to mitigate risk when appropriate.
Outstanding energy loan balances were largely unchanged compared to the prior quarter at $3.4 billion or 14% of total loans at March 31, 2024. Approximately $2.6 billion of energy loans were to oil and gas producers, a $32 million decrease compared to December 31, 2023. The majority of this portfolio is first lien, senior secured, reserve-based lending, which we believe is the lowest risk form of energy lending. Approximately 70% of committed production loans are secured by properties primarily producing oil, and 30% of the committed production loans are secured by properties primarily producing natural gas.
Loans to midstream oil and gas companies totaled $604 million at March 31, 2024, a $54 million increase compared to December 31, 2023. Loans to borrowers that provide services to the energy industry totaled $178 million at March 31, 2024, largely unchanged compared to the prior quarter. Loans to other energy borrowers, including those engaged in wholesale or retail energy sales, totaled $35 million, a $12 million decrease compared to December 31, 2023.
Unfunded energy loan commitments were $4.3 billion at March 31, 2024, a $147 million decrease compared to December 31, 2023.
The healthcare sector of the loan portfolio totaled $4.2 billion or 18% of total loans. Healthcare loans increased $103 million over December 31, 2023, primarily due to growth in loans to senior housing facilities. Healthcare sector loans consist primarily of loans for the development and operation of senior housing and care facilities including independent living, assisted living and skilled nursing. Generally we loan to borrowers with a portfolio of multiple facilities that serves to help diversify risks specific to a single facility.
The services sector of the loan portfolio totaled $3.5 billion or 15% of total loans, a $47 million decrease compared to the prior quarter. Service sector loans consist of a large number of loans to a variety of businesses including Native American tribal and state and local municipal government entities, Native American tribal casino operations, foundations and not-for-profit organizations, educational services and specialty trade contractors. Approximately $1.5 billion of the services category is made up of loans with individual balances of less than $10 million. Services sector loans are generally secured by the assets of the borrower with repayment coming from the cash flows of ongoing operations of the customer's business.
General business loans totaled $3.9 billion or 16% of total loans, an increase of $267 million compared to the prior quarter. General business loans consist of $2.4 billion of wholesale/retail loans and $1.5 billion of loans from other commercial industries.
We participate in shared national credits when appropriate to obtain or maintain business relationships with local customers. Shared national credits are defined by banking regulators as credits of $100 million or more and with three or more non-affiliated banks as participants. At March 31, 2024, the outstanding principal balance of these loans totaled $5.8 billion, including $2.4 billion of energy loans. Substantially all of these loans are to borrowers with local market relationships. We serve as the agent lender in approximately 21% of our shared national credits, based on dollars committed. We hold shared national credits to the same standard of analysis and perform the same level of review as internally originated credits. Our lending policies generally avoid loans in which we do not have the opportunity to maintain or achieve other business relationships with the customer. In addition to management's quarterly assessment of credit risk, banking regulators annually review a sample of shared national credits for proper risk grading.
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Commercial Real Estate
Commercial real estate represents loans for the construction of buildings or other improvements to real estate and property held by borrowers for investment purposes generally within our geographical footprint. We require collateral values in excess of the loan amounts, demonstrated cash flows in excess of expected debt service requirements, equity investment in the project and a portion of the project already sold, leased or permanent financing already secured. The expected cash flows from all significant new or renewed income producing property commitments are stress tested to reflect the risks in varying interest rates, vacancy rates and rental rates. As with commercial loans, inherent lending risks are centrally monitored on a continuous basis from underwriting throughout the life of the loan for compliance with applicable lending policies.
Outstanding commercial real estate loan balances totaled $5.2 billion or 22% of total loans at March 31, 2024, a decrease of $101 million compared to December 31, 2023. Loans secured by industrial facilities decreased by $131 million to $1.3 billion and loans secured by retail properties decreased by $49 million to $544 million at March 31, 2024. The decline in these portfolios was partially offset by an $88 million increase in loans secured by multifamily properties.
Approximately 66% of loans in this segment are in our geographic footprint based on collateral location. The largest concentration of loans in this segment outside our footprint is Utah, totaling 9% of the segment. All other states represent less than 5% individually.
Unfunded commercial real estate loan commitments were $1.7 billion at March 31, 2024, a decrease of $147 million compared to December 31, 2023. We take a disciplined approach to managing our concentration of commercial real estate loan commitments as a percentage of capital.
Loans to Individuals
Loans to individuals include residential mortgage and personal loans. Residential mortgage loans provide funds for our customers to purchase or refinance their primary residence or to borrow against the equity in their home. These loans are secured by a first or second mortgage on the customer's primary residence. Personal loans consist primarily of loans to Wealth Management clients secured by the cash surrender value of insurance policies and marketable securities. Personal loans also include direct loans secured by and for the purchase of automobiles, recreational and marine equipment as well as unsecured loans. These loans are made in accordance with underwriting policies we believe to be conservative and are fully documented. Loans may be individually underwritten or credit scored based on size and other criteria. Credit scoring is assessed based on significant credit characteristics including credit history, residential and employment stability.
In general, we sell the majority of our conforming fixed-rate mortgage loan originations in the secondary market and retain the majority of our non-conforming and adjustable-rate mortgage loans. Our mortgage loan portfolio does not include payment option adjustable-rate mortgage loans or adjustable-rate mortgage loans with initial rates that are below market. Home equity loans are primarily first-lien and fully amortizing.
Residential mortgage loans guaranteed by U.S. government agencies have limited credit exposure because of the agency guarantee. This amount includes residential mortgage loans previously sold into GNMA mortgage pools that the Company may repurchase when certain defined delinquency criteria are met. Because of this repurchase right, the Company is deemed to have regained effective control over these loans and must include them on the Consolidated Balance Sheet.
Loans to individuals totaled $3.8 billion or 16% of the loan portfolio, an increase of $39 million compared to December 31, 2023. Approximately 91% of the loans in this segment are secured by collateral located within our geographical footprint. Loans for which the collateral location is less relevant, such as unsecured loans, are categorized by the borrower's primary location.
The Company secondarily evaluates loan portfolio performance based on the primary geographical market managing the loan. Loans attributed to a geographical market may not represent the location of the borrower or the collateral. All permanent mortgage loans serviced by our mortgage banking unit and held for investment by the Company are centrally managed by the Oklahoma market.
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Table 13 – Loans Managed by Primary Geographical Market
(In thousands)

|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  | Sep. 30, 2023 |  | June 30, 2023 |  | Mar. 31, 2023
Texas: |  |  |  |  |  |  |  |  |  |
Commercial |  | $ | 7,515,070 |  |  | $ | 7,384,107 |  |  | $ | 7,249,963 |  |  | $ | 7,223,820 |  |  | $ | 7,103,166 |
Commercial real estate |  | 1,935,728 |  |  | 1,987,037 |  |  | 1,873,477 |  |  | 1,748,796 |  |  | 1,675,831 |
Loans to individuals |  | 964,464 |  |  | 914,134 |  |  | 961,299 |  |  | 974,911 |  |  | 992,343 |
Total Texas |  | 10,415,262 |  |  | 10,285,278 |  |  | 10,084,739 |  |  | 9,947,527 |  |  | 9,771,340 |
Oklahoma: |  |  |  |  |  |  |  |  |  |
Commercial |  | 3,478,146 |  |  | 3,275,907 |  |  | 3,384,627 |  |  | 3,251,547 |  |  | 3,178,934 |
Commercial real estate |  | 605,419 |  |  | 606,515 |  |  | 601,087 |  |  | 573,559 |  |  | 574,708 |
Loans to individuals |  | 2,176,268 |  |  | 2,147,782 |  |  | 2,100,974 |  |  | 2,079,311 |  |  | 2,049,472 |
Total Oklahoma |  | 6,259,833 |  |  | 6,030,204 |  |  | 6,086,688 |  |  | 5,904,417 |  |  | 5,803,114 |
Colorado: |  |  |  |  |  |  |  |  |  |
Commercial |  | 2,244,416 |  |  | 2,273,179 |  |  | 2,219,460 |  |  | 2,179,473 |  |  | 2,148,066 |
Commercial real estate |  | 766,100 |  |  | 769,329 |  |  | 710,552 |  |  | 683,973 |  |  | 646,537 |
Loans to individuals |  | 221,291 |  |  | 228,257 |  |  | 227,569 |  |  | 223,200 |  |  | 231,368 |
Total Colorado |  | 3,231,807 |  |  | 3,270,765 |  |  | 3,157,581 |  |  | 3,086,646 |  |  | 3,025,971 |
Arizona: |  |  |  |  |  |  |  |  |  |
Commercial |  | 1,149,394 |  |  | 1,143,682 |  |  | 1,173,491 |  |  | 1,177,778 |  |  | 1,115,973 |
Commercial real estate |  | 1,007,972 |  |  | 1,003,331 |  |  | 1,014,151 |  |  | 926,750 |  |  | 881,465 |
Loans to individuals |  | 218,664 |  |  | 248,873 |  |  | 260,282 |  |  | 242,102 |  |  | 240,556 |
Total Arizona |  | 2,376,030 |  |  | 2,395,886 |  |  | 2,447,924 |  |  | 2,346,630 |  |  | 2,237,994 |
Kansas/Missouri: |  |  |  |  |  |  |  |  |  |
Commercial |  | 320,609 |  |  | 331,179 |  |  | 307,725 |  |  | 309,148 |  |  | 318,782 |
Commercial real estate |  | 497,036 |  |  | 511,947 |  |  | 547,708 |  |  | 516,299 |  |  | 489,951 |
Loans to individuals |  | 141,767 |  |  | 144,958 |  |  | 132,137 |  |  | 138,960 |  |  | 129,580 |
Total Kansas/Missouri |  | 959,412 |  |  | 988,084 |  |  | 987,570 |  |  | 964,407 |  |  | 938,313 |
New Mexico: |  |  |  |  |  |  |  |  |  |
Commercial |  | 317,651 |  |  | 291,736 |  |  | 297,714 |  |  | 287,443 |  |  | 280,945 |
Commercial real estate |  | 352,559 |  |  | 389,106 |  |  | 405,989 |  |  | 425,472 |  |  | 449,715 |
Loans to individuals |  | 67,814 |  |  | 67,485 |  |  | 69,418 |  |  | 64,803 |  |  | 65,770 |
Total New Mexico |  | 738,024 |  |  | 748,327 |  |  | 773,121 |  |  | 777,718 |  |  | 796,430 |
Arkansas: |  |  |  |  |  |  |  |  |  |
Commercial |  | 107,581 |  |  | 103,979 |  |  | 86,859 |  |  | 105,307 |  |  | 71,483 |
Commercial real estate |  | 71,863 |  |  | 70,382 |  |  | 88,336 |  |  | 95,952 |  |  | 97,109 |
Loans to individuals |  | 12,748 |  |  | 12,063 |  |  | 11,200 |  |  | 9,055 |  |  | 8,299 |
Total Arkansas |  | 192,192 |  |  | 186,424 |  |  | 186,395 |  |  | 210,314 |  |  | 176,891 |
Total BOK Financial loans |  | $ | 24,172,560 |  |  | $ | 23,904,968 |  |  | $ | 23,724,018 |  |  | $ | 23,237,659 |  |  | $ | 22,750,053 |

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Off-Balance Sheet Commitments
We enter into certain off-balance sheet arrangements in the normal course of business as shown in Table 14. Loan commitments may be unconditional obligations to provide financing or conditional obligations that depend on the borrower's financial condition, collateral value or other factors. Standby letters of credit are unconditional commitments to guarantee the performance of our customer to a third party. Since some of these commitments are expected to expire before being drawn upon, the total commitment amounts do not necessarily represent future cash requirements.
We have off-balance sheet commitments related to certain residential mortgage loans sold into mortgage-backed securities as part of our mortgage banking activities. We retain off-balance sheet credit risk related to losses in excess of amounts guaranteed by the VA.
We also have off-balance sheet credit risk related to certain residential mortgage loans primarily originated under community development loan programs that were sold to a U.S. government agency with full recourse prior to 2007. We are obligated to repurchase these loans for the life of these loans in the event of foreclosure for the unpaid principal and interest at the time of foreclosure. The majority of our conforming fixed-rate loan originations are sold in the secondary market, and we only retain repurchase obligations under standard underwriting representations and warranties.
Table 14 – Off-Balance Sheet Credit Commitments
(In thousands)

|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  | Sep. 30, 2023 |  | June 30, 2023 |  | Mar. 31, 2023
Loan commitments |  | $ | 14,433,786 |  |  | $ | 14,793,025 |  |  | $ | 14,404,610 |  |  | $ | 14,979,253 |  |  | $ | 15,119,984 |
Standby letters of credit |  | 733,903 |  |  | 710,543 |  |  | 759,563 |  |  | 721,908 |  |  | 790,316 |
Unpaid principal balance of residential mortgage loans sold with recourse |  | 37,891 |  |  | 39,333 |  |  | 40,369 |  |  | 42,041 |  |  | 43,510 |
Unpaid principal balance of residential mortgage loans transferred into mortgage-backed securities guaranteed by U.S. Dept. of Veterans Affairs |  | 950,115 |  |  | 959,256 |  |  | 970,469 |  |  | 988,212 |  |  | 996,139 |

Customer Hedging Programs
We offer programs that permit our customers to hedge various risks, including fluctuations in energy, cattle and other agricultural product prices, interest rates and foreign exchange rates. Each of these programs work essentially the same way. Derivative contracts are executed between the customers and the Company. Offsetting contracts are executed between the Company and selected counterparties to minimize market risk due to changes in commodity prices, interest rates or foreign exchange rates. The counterparty contracts are identical to the customer contracts except for a fixed pricing spread or a fee paid to us as compensation for administrative costs, credit risk and profit.
The customer hedging programs create credit risk for potential amounts due to the Company from our customers and from the counterparties. Customer credit risk is monitored through existing credit policies and procedures. The effects of changes in commodity prices, interest rates or foreign exchange rates are evaluated across a range of possible scenarios to determine the maximum exposure we are willing to have individually to any customer. Customers may also be required to provide cash margin or other collateral in conjunction with our credit agreements to further limit our credit risk.
Counterparty credit risk is evaluated through existing policies and procedures. This evaluation considers the total relationship between BOK Financial and each of the counterparties. Individual limits are established by management, approved by Credit Administration and reviewed by the Asset/Liability Committee. Margin collateral is required if the exposure between the Company and any counterparty exceeds established limits. Based on declines in the counterparties' credit ratings, these limits may be reduced and additional margin collateral may be required.
A deterioration of the credit standing of one or more of the customers or counterparties to these contracts may result in BOK Financial recognizing a loss as the fair value of the affected contracts may no longer move in tandem with the offsetting contracts. This occurs if the credit standing of the customer or counterparty deteriorates such that either the fair value of underlying collateral no longer supports the contract or the customer or the counterparty's ability to provide margin collateral becomes impaired. Credit losses on customer derivatives reduce brokerage and trading revenue in the Consolidated Statements of Earnings.
- 24 -

Derivative contracts are carried at fair value. At March 31, 2024, the net fair value of derivative contracts, before consideration of cash margin, reported as assets under these programs totaled $463 million compared to $593 million at December 31, 2023. At March 31, 2024, the net fair value of our derivative contracts included $293 million for energy contracts, $114 million for interest rate swaps and $56 million for foreign exchange contracts. The aggregate net fair value of derivative contracts, before consideration of cash margin, held under these programs reported as liabilities totaled $460 million at March 31, 2024 and $587 million at December 31, 2023.
At March 31, 2024, total derivative assets were reduced by $230 million of cash collateral received from counterparties and total derivative liabilities were reduced by $29 million of cash collateral paid to counterparties related to instruments executed with the same counterparty under a master netting agreement. Derivative contracts executed with customers may be secured by non-cash collateral in conjunction with a credit agreement with that customer, such as proven producing oil and gas properties. Access to this collateral in an event of default is reasonably assured.
A table showing the notional and fair value of derivative assets and liabilities on both a gross and net basis is presented in Note 3 to the Consolidated Financial Statements.
The fair value of derivative contracts reported as assets under these programs, net of cash margin held by the Company, by category of debtor at March 31, 2024 follows in Table 15.
Table 15 – Fair Value of Derivative Contracts
(In thousands)

Customers |  | $ | 143,971 |
Banks and other financial institutions |  | 34,791 |
Exchanges and clearing organizations |  | 54,953 |
Fair value of customer risk management program asset derivative contracts, net |  | $ | 233,715 |

At March 31, 2024, our largest derivative exposure was to an exchange for $61 million of net derivative positions, net of cash margin.
Our customer hedging program also introduces liquidity and capital risk. We are required to provide cash margin to certain counterparties when the net negative fair value of the contracts exceeds established limits which may incur additional funding costs. Also, changes in commodity prices affect risk-weighted assets and total assets which in turn impacts regulatory capital ratios. These risks are modeled as part of the management of these programs. Based on current prices, a decrease in market prices to an equivalent of $65.64 per barrel of oil would decrease the fair value of derivative assets by $104 million, with lending customers comprising the bulk of the assets. An increase in prices to an equivalent of $100.70 per barrel of oil would increase the fair value of derivative assets by $635 million as asset values rise faster than margin paid. Liquidity requirements of this program may also be affected by our credit rating. At March 31, 2024, a decrease in our credit rating to below investment grade would increase our obligation to post cash margin on existing contracts by approximately $10 million.
The fair value of our to-be-announced residential mortgage-backed securities and interest rate swap derivative contracts is affected by changes in interest rates. Based on our assessment as of March 31, 2024, changes in interest rates would not materially impact regulatory capital or liquidity needed to support this portion of our customer derivative program.
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Summary of Credit Loss Experience
Table 16 – Summary of Credit Loss Experience
(Dollars in thousands)

| Three Months Ended
| Mar. 31, 2024 |  | Dec. 31, 2023 |  | Sep. 30, 2023 |  | June 30, 2023 |  | Mar. 31, 2023
Allowance for loan losses: |  |  |  |  |  |  |  |  |
Beginning balance | $ | 277,123 |  |  | $ | 272,114 |  |  | 262,714 |  |  | 249,460 |  |  | 235,704 |
Loans charged off | (7,060) |  |  | (5,007) |  |  | (10,593) |  |  | (8,049) |  |  | (3,667) |
Recoveries of loans previously charged off | 1,600 |  |  | 911 |  |  | 4,062 |  |  | 1,346 |  |  | 2,898 |
Net loans charged off | (5,460) |  |  | (4,096) |  |  | (6,531) |  |  | (6,703) |  |  | (769) |
Provision for credit losses | 9,960 |  |  | 9,105 |  |  | 15,931 |  |  | 19,957 |  |  | 14,525 |
Ending balance | $ | 281,623 |  |  | $ | 277,123 |  |  | $ | 272,114 |  |  | $ | 262,714 |  |  | $ | 249,460 |
Accrual for off-balance sheet credit risk from unfunded loan commitments: |  |  |  |  |  |  |  |  |
Beginning balance | $ | 48,977 |  |  | $ | 52,604 |  |  | 59,940 |  |  | 62,943 |  |  | 60,919 |
Provision for credit losses | (1,658) |  |  | (3,627) |  |  | (7,336) |  |  | (3,003) |  |  | 2,024 |
Ending balance | $ | 47,319 |  |  | $ | 48,977 |  |  | $ | 52,604 |  |  | $ | 59,940 |  |  | $ | 62,943 |
Accrual for off-balance sheet credit risk associated with mortgage banking activities: |  |  |  |  |  |  |  |  |
Beginning balance | $ | 3,492 |  |  | $ | 2,962 |  |  | 4,443 |  |  | 4,381 |  |  | 4,904 |
Loans charged off | (3) |  |  | — |  |  | (7) |  |  | (16) |  |  | (35) |
Provision for credit losses | (265) |  |  | 530 |  |  | (1,474) |  |  | 78 |  |  | (488) |
Ending balance | $ | 3,224 |  |  | $ | 3,492 |  |  | $ | 2,962 |  |  | $ | 4,443 |  |  | $ | 4,381 |
Allowance for credit losses related to held-to-maturity (investment) securities: |  |  |  |  |  |  |  |  |
Beginning balance | $ | 336 |  |  | $ | 344 |  |  | $ | 465 |  |  | $ | 497 |  |  | $ | 558 |
Provision for credit losses | (37) |  |  | (8) |  |  | (121) |  |  | (32) |  |  | (61) |
Ending balance | $ | 299 |  |  | $ | 336 |  |  | $ | 344 |  |  | $ | 465 |  |  | $ | 497 |
Total provision for credit losses | $ | 8,000 |  |  | $ | 6,000 |  |  | $ | 7,000 |  |  | $ | 17,000 |  |  | $ | 16,000 |
Average loans by portfolio segment : |  |  |  |  |  |  |  |  |
Commercial | $ | 14,992,639 |  |  | $ | 14,680,001 |  |  | $ | 14,527,676 |  |  | $ | 14,316,474 |  |  | $ | 14,046,237 |
Commercial real estate | 5,188,152 |  |  | 5,293,021 |  |  | 5,172,876 |  |  | 4,896,230 |  |  | 4,757,362 |
Loans to individuals | 3,767,776 |  |  | 3,732,086 |  |  | 3,713,756 |  |  | 3,676,350 |  |  | 3,672,648 |
Net charge-offs (annualized) to average loans | 0.09 | % |  | 0.07 | % |  | 0.11 | % |  | 0.12 | % |  | 0.01 | %
Net charge-offs (annualized) to average loans by portfolio segment: |  |  |  |  |  |  |  |  |
Commercial | 0.09 | % |  | 0.08 | % |  | 0.18 | % |  | 0.06 | % |  | (0.06) | %
Commercial real estate | 0.10 | % |  | — | % |  | (0.07) | % |  | 0.32 | % |  | 0.17 | %
Loans to individuals | 0.10 | % |  | 0.11 | % |  | 0.10 | % |  | 0.08 | % |  | 0.07 | %
Recoveries to gross charge-offs | 22.66 | % |  | 18.19 | % |  | 38.35 | % |  | 16.72 | % |  | 79.03 | %
Provision for loan losses (annualized) to average loans | 0.17 | % |  | 0.15 | % |  | 0.27 | % |  | 0.35 | % |  | 0.26 | %
Allowance for loan losses to loans outstanding at period end | 1.17 | % |  | 1.16 | % |  | 1.15 | % |  | 1.13 | % |  | 1.10 | %
Accrual for unfunded loan commitments to loan commitments | 0.33 | % |  | 0.33 | % |  | 0.37 | % |  | 0.40 | % |  | 0.42 | %
Combined allowance for loan losses and accrual for off-balance sheet credit risk from unfunded loan commitments to loans outstanding at period end | 1.36 | % |  | 1.36 | % |  | 1.37 | % |  | 1.39 | % |  | 1.37 | %

- 26 -

Allowance for Loan Losses and Accrual for Off-Balance Sheet Credit Risk from Unfunded Loan Commitments
Expected credit losses on assets carried at amortized cost are recognized over their expected lives based on models that measure the probability of default and loss given default over a 12-month reasonable and supportable forecast period. Models incorporate base case, downside and upside macroeconomic variables such as real GDP growth, civilian unemployment rate, commercial real estate vacancy rates and WTI oil prices on a probability weighted basis. See Note 4 to the Consolidated Financial Statements for additional discussion of methodology of allowance for loan losses.
Non-pass grade loans, including loans especially mentioned, accruing substandard and nonaccruing loans, decreased $14 million compared to December 31, 2023. Non-pass grade general business loans decreased $23 million, partially offset by a $12 million increase in non-pass grade commercial real estate loans. A summary of outstanding loan balances by risk grade is included in Note 4 to the Consolidated Financial Statements.
The provision for credit losses of $8.0 million in the first quarter of 2024 reflects continued loan growth and a stable economic forecast. The allowance for loan losses totaled $282 million or 1.17% of outstanding loans at March 31, 2024. Excluding residential mortgage loans guaranteed by U.S. government agencies, the allowance for loan losses was 255% of nonaccruing loans. The combined allowance for loan losses and accrual for off-balance sheet credit risk from unfunded loan commitments was $329 million or 1.36% of outstanding loans and 298% of nonaccruing loans at March 31, 2024.
The probability weighting of all scenarios in our reasonable and supportable forecast remained unchanged compared to the prior quarter. The sensitivity to management's economic scenario weighting may be quantified by comparing the results of weighting each economic scenario at 100%. For example, compared to a 100% base case scenario, a 100% downside case would result in an additional $210 million in quantitative reserve, while a 100% upside case would result in $6.9 million less quantitative reserve at March 31, 2024. Such sensitivity calculations do not necessarily reflect the nature and extent of future changes in the related allowance.
The Company recorded a $6.0 million provision for credit losses in the fourth quarter of 2023. The allowance for loan losses was $277 million or 1.16% of outstanding loans at December 31, 2023. Excluding residential mortgage loans guaranteed by U.S. government agencies, the allowance for loan losses was 204% of nonaccruing loans. The combined allowance for loan losses and accrual for off-balance sheet credit risk from unfunded loan commitments was $326 million or 1.36% of outstanding loans and 240% of nonaccruing loans.
- 27 -

A summary of macroeconomic variables considered in developing our estimate of expected credit losses at March 31, 2024 follows:

| Base | Downside | Upside
Scenario probability weighting | 50% | 35% | 15%
Economic outlook | Geopolitical conflicts remain isolated. Beginning in the third quarter of 2024, there is one rate cut per quarter, bringing the federal funds target range of 4.50% to 4.75% by the end of the first quarter of 2025. Core inflation continues to improve from the previous peaks and reaches 2.5% by the first quarter of 2025. Job openings revert to more normalized levels and overall hiring levels decline, causing the national unemployment rate to modestly increase over the next four quarters. Inflation pressures ease and help stabilize real household income. A restrictive credit environment slows economic activity and results in below-trend GDP growth. | Geopolitical conflicts remain isolated. The Federal Reserve is forced to adopt an accommodative monetary policy compared to the base case scenario and cut the federal funds rate significantly to encourage economic activity and job creation. In total, there are ten rate cuts over the next four quarters bringing the target range to 2.75% to 3.00% by the first quarter of 2025. Tight monetary conditions result in declines in consumer spending while a restrictive credit environment decreases private sector investment. This pushes the United States into a recession, with a contraction in economic activity and a sharp increase in the unemployment rate. | Geopolitical conflicts remain isolated. There are four federal funds rate cuts in 2024 and one rate cut in the first quarter of 2025, bringing the target range to 4.00% to 4.25%. Core inflation continues to improve from the previous peaks and reaches 2.2% by the first quarter of 2025. Labor force participants continue to re-enter the job market to help fill the elevated level of job openings. The increase in employment helps maintain household income above its pre-pandemic trend. This supports consumer spending and produces GDP growth consistent with pre-pandemic levels.
Macro-economic factors | –GDP is forecasted to grow by 1.6% over the next 12 months. –Civilian unemployment rate of 3.9% in the second quarter of 2024 increases to 4.2% by the first quarter of 2025. –WTI oil prices are projected to generally follow the NYMEX forward curve that existed at the end of March 2024 and are expected to average $75.40 per barrel over the next 12 months. | –GDP is forecasted to contract 1.8% over the next twelve months. –Civilian unemployment rate of 4.6% in the second quarter of 2024 increases to 6.2% in the first quarter of 2025. –WTI oil prices are projected to average $53.30 over the next 12 months, with a peak of $61.94 in the second quarter of 2024 and falling 22% over the following three quarters. | –GDP is forecasted to grow by 2.1% over the next 12 months. –Civilian unemployment rate of 3.8% in the second quarter of 2024 increases to 4.0% by the first quarter of 2025. –WTI oil prices are projected to average $74.75 per barrel over the next 12 months.

- 28 -

Net Loans Charged Off
Net loans charged off totaled $5.5 million or 0.09% of average loans in the first quarter. Net charge-offs were primarily composed of a $3.2 million general business loan and a $1.3 million office loan. Net charge-offs of loans to individuals include deposit account overdraft losses.
Accrual for Off-Balance Sheet Credit Risk Associated with Mortgage Banking Activities
The accrual for off-balance sheet credit risk associated with mortgage banking activities includes consideration of credit risk related to certain residential mortgage loans sold into mortgage-backed securities in excess of amounts guaranteed by the VA and mortgage loans originated under community development loan programs that were sold to a U.S. government agency with full recourse.
We use publicly available long-term national data to estimate total loss given default for our off-balance sheet credit risk related to losses in excess of amounts guaranteed by the VA. This result is combined with probability of default output from our mortgage servicing rights model to estimate total expected loss. Then, we estimate the VA's guarantee percentage to determine our portion of the credit risk. Qualitative adjustment may be used, if necessary.
Allowance for Credit Losses Related to Held-to-Maturity (Investment) Securities
The expected credit losses principles apply to all financial assets measured at cost, including our held-to-maturity (investment) debt securities portfolio. Our investment portfolio includes municipal and other tax-exempt securities and other debt securities. Expected credit losses for these assets are based on the probability of default and loss given default assumptions that align with similarly graded loans. Qualitative adjustment may be used, if necessary.
- 29 -

Nonperforming Assets
As more fully described in Note 4 to the Consolidated Financial Statements, loans are generally classified as nonaccruing when it becomes probable that we will not collect the full contractual principal and interest. Real estate and other repossessed assets are assets acquired in partial or total forgiveness of loans. The assets are carried at the lower of cost as determined by fair value at the date of foreclosure or current fair value, less estimated selling costs. A summary of nonperforming assets follows in Table 17:
Table 17 – Nonperforming Assets
(Dollars in thousands)

|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  | Sep. 30, 2023 |  | June 30, 2023 |  | Mar. 31, 2023
Nonaccruing loans: |  |  |  |  |  |  |  |  |  |
Commercial: |  |  |  |  |  |  |  |  |  |
Healthcare |  | $ | 49,307 |  |  | $ | 81,529 |  |  | $ | 41,836 |  |  | $ | 36,753 |  |  | $ | 37,247 |
Energy |  | 14,991 |  |  | 17,843 |  |  | 19,559 |  |  | 20,037 |  |  | 127 |
Services |  | 3,319 |  |  | 3,616 |  |  | 2,820 |  |  | 4,541 |  |  | 8,097 |
General business |  | 7,003 |  |  | 7,143 |  |  | 6,483 |  |  | 11,946 |  |  | 8,961 |
Total commercial |  | 74,620 |  |  | 110,131 |  |  | 70,698 |  |  | 73,277 |  |  | 54,432 |
Commercial real estate |  | 22,087 |  |  | 7,320 |  |  | 7,418 |  |  | 17,395 |  |  | 21,668 |
Loans to individuals: |  |  |  |  |  |  |  |  |  |
Residential mortgage |  | 13,449 |  |  | 18,056 |  |  | 30,954 |  |  | 29,973 |  |  | 29,693 |
Residential mortgage guaranteed by U.S. government agencies |  | 9,217 |  |  | 9,709 |  |  | 10,436 |  |  | 11,473 |  |  | 14,302 |
Personal |  | 142 |  |  | 253 |  |  | 79 |  |  | 133 |  |  | 200 |
Total loans to individuals |  | 22,808 |  |  | 28,018 |  |  | 41,469 |  |  | 41,579 |  |  | 44,195 |
Total nonaccruing loans |  | 119,515 |  |  | 145,469 |  |  | 119,585 |  |  | 132,251 |  |  | 120,295 |
Real estate and other repossessed assets |  | 2,860 |  |  | 2,875 |  |  | 3,753 |  |  | 4,227 |  |  | 12,651 |
Total nonperforming assets |  | $ | 122,375 |  |  | $ | 148,344 |  |  | $ | 123,338 |  |  | $ | 136,478 |  |  | $ | 132,946 |
Total nonperforming assets excluding those guaranteed by U.S. government agencies |  | $ | 113,158 |  |  | $ | 138,635 |  |  | $ | 112,902 |  |  | $ | 125,005 |  |  | $ | 118,644 |
Allowance for loan losses to nonaccruing loans 1 |  | 255.33 | % |  | 204.13 | % |  | 249.31 | % |  | 217.52 | % |  | 235.36 | %
Combined allowance for loan losses and accrual for off-balance sheet credit risk from unfunded loan commitments to nonaccruing loans 1 |  | 298.23 | % |  | 240.20 | % |  | 297.50 | % |  | 267.15 | % |  | 294.74 | %
Nonperforming assets to outstanding loans and repossessed assets |  | 0.51 | % |  | 0.62 | % |  | 0.52 | % |  | 0.59 | % |  | 0.58 | %
Nonperforming assets to outstanding loans and repossessed assets 1 |  | 0.47 | % |  | 0.58 | % |  | 0.48 | % |  | 0.54 | % |  | 0.53 | %
Nonaccruing loans to outstanding loans |  | 0.49 | % |  | 0.61 | % |  | 0.50 | % |  | 0.57 | % |  | 0.53 | %
Nonaccruing commercial loans to outstanding commercial loans |  | 0.49 | % |  | 0.74 | % |  | 0.48 | % |  | 0.50 | % |  | 0.38 | %
Nonaccruing commercial real estate loans to outstanding commercial real estate loans |  | 0.42 | % |  | 0.14 | % |  | 0.14 | % |  | 0.35 | % |  | 0.45 | %
Nonaccruing loans to individuals to outstanding loans to individuals 1 |  | 0.37 | % |  | 0.51 | % |  | 0.86 | % |  | 0.85 | % |  | 0.86 | %

1 Excludes residential mortgages guaranteed by U.S. government agencies.
Nonaccruing loans decreased $26 million compared to December 31, 2023. New nonaccruing loans identified in the first quarter totaled $24 million, offset by $34 million of loans that returned to accruing status, $8.6 million in payments received and $7.1 million of charge-offs. Nonaccruing healthcare loans decreased $32 million, partially offset by a $15 million increase in nonaccruing commercial real estate loans driven primarily by a single office loan. The Company generally retains nonperforming assets to maximize potential recovery, which may cause future nonperforming assets to decrease more slowly.
A rollforward of nonperforming assets for the three months ended March 31, 2024 follows in Table 18.
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Table 18 – Rollforward of Nonperforming Assets
(In thousands)

|  | Three Months Ended
|  | March 31, 2024
|  | Nonaccruing Loans |  |  |  | Real Estate and Other Repossessed Assets |  | Total Nonperforming Assets
|  | Commercial |  | Commercial Real Estate |  | Loan to Individuals |  | Total |  |  |
Balance, December 31, 2023 |  | $ | 110,131 |  |  | $ | 7,320 |  |  | $ | 28,018 |  |  | $ | 145,469 |  |  |  |  | $ | 2,875 |  |  | $ | 148,344 |
Additions |  | 4,942 |  |  | 16,042 |  |  | 3,251 |  |  | 24,235 |  |  |  |  | — |  |  | 24,235 |
Payments |  | (6,116) |  |  | (25) |  |  | (2,433) |  |  | (8,574) |  |  |  |  | — |  |  | (8,574) |
Charge-offs |  | (4,240) |  |  | (1,250) |  |  | (1,570) |  |  | (7,060) |  |  |  |  | — |  |  | (7,060) |
Net gains (losses) and write-downs |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  | 109 |  |  | 109 |
Foreclosure of nonperforming loans |  | — |  |  | — |  |  | (77) |  |  | (77) |  |  |  |  | 77 |  |  | — |
Foreclosure of loans guaranteed by U.S. government agencies |  | — |  |  | — |  |  | (558) |  |  | (558) |  |  |  |  | — |  |  | (558) |
Proceeds from sales |  | — |  |  | — |  |  | — |  |  | — |  |  |  |  | (201) |  |  | (201) |
Net transfers to nonaccruing loans |  | — |  |  | — |  |  | (5) |  |  | (5) |  |  |  |  | — |  |  | (5) |
Return to accrual status |  | (30,097) |  |  | — |  |  | (3,818) |  |  | (33,915) |  |  |  |  | — |  |  | (33,915) |
Balance, March 31, 2024 |  | $ | 74,620 |  |  | $ | 22,087 |  |  | $ | 22,808 |  |  | $ | 119,515 |  |  |  |  | $ | 2,860 |  |  | $ | 122,375 |

We foreclose on loans guaranteed by U.S. government agencies in accordance with agency guidelines. Generally, these loans are not eligible for modification programs or have failed to comply with modified loan terms. Principal is guaranteed by agencies of the U.S. government, subject to limitations, and credit risk is limited. At foreclosure, these amounts are transferred to claims receivable accounts. These properties will be conveyed to the agencies once applicable criteria have been met.
Real Estate and Other Repossessed Assets
Real estate and other repossessed assets totaled $2.9 million at March 31, 2024, largely unchanged compared to December 31, 2023. Real estate and other repossessed assets were composed primarily of $2.1 million of land for commercial real estate development.
Liquidity and Capital
Our funding sources, which primarily include deposits and borrowings from the Federal Home Loan Banks and other banks, provide adequate liquidity to meet our operating needs. Based on the average balances for the first quarter of 2024, approximately 70% of our funding was provided by deposit accounts, 16% from borrowed funds, 10% from equity and less than 1% from long-term subordinated debt.
Subsidiary Bank
Deposits and borrowed funds are the primary sources of liquidity for BOKF, NA, the wholly owned subsidiary bank of BOK Financial. We compete for retail and commercial deposits by offering a broad range of products and services and focusing on customer convenience. Retail deposit growth is supported through personal and small business checking, online bill paying services, mobile banking services, an extensive network of branch locations and ATMs and our ExpressBank call center. Commercial deposit growth is supported by offering treasury management and lockbox services. We also acquire brokered deposits when the cost of funds is advantageous to other funding sources.
Average deposits for the first quarter of 2024 totaled $35.0 billion, a $1.3 billion increase compared to the fourth quarter of 2023. Demand deposits decreased $747 million while interest-bearing transaction account balances increased $1.8 billion. Time deposit balances increased $285 million.
- 31 -

Table 19 – Average Deposits by Line of Business
(In thousands)

| Three Months Ended
| Mar. 31, 2024 |  | Dec. 31, 2023 |  | Sep. 30, 2023 |  | June 30, 2023 |  | Mar. 31, 2023
Commercial Banking | $ | 15,730,241 |  |  | $ | 15,493,326 |  |  | $ | 15,115,313 |  |  | $ | 14,822,093 |  |  | $ | 15,861,285 |
Consumer Banking | 7,901,167 |  |  | 7,890,032 |  |  | 7,936,186 |  |  | 7,986,674 |  |  | 8,248,541 |
Wealth Management | 9,237,965 |  |  | 8,085,643 |  |  | 7,886,962 |  |  | 7,544,143 |  |  | 7,432,413 |
Subtotal | 32,869,373 |  |  | 31,469,001 |  |  | 30,938,461 |  |  | 30,352,910 |  |  | 31,542,239 |
Funds Management and other | 2,156,518 |  |  | 2,207,212 |  |  | 2,349,436 |  |  | 2,016,802 |  |  | 1,940,232 |
Total | $ | 35,025,891 |  |  | $ | 33,676,213 |  |  | $ | 33,287,897 |  |  | $ | 32,369,712 |  |  | $ | 33,482,471 |

Average Commercial Banking deposit balances increased $237 million compared to the fourth quarter of 2023. Interest-bearing transaction account balances increased $784 million while demand deposit balances decreased $549 million. Our Commercial deposit portfolio is highly diversified across industries and customers. The highest concentration by industry within our commercial deposit portfolio is our energy customers representing 8% of our total deposits.
Average Consumer Banking deposit balances increased $11 million over the prior quarter. A $256 million increase in time deposit balances was partially offset by a $175 million decrease in interest-bearing transaction deposit balances and a $65 million decrease in demand deposit balances.
Average Wealth Management deposits increased $1.2 billion compared to the fourth quarter of 2023. Interest-bearing transaction account balances increased $1.2 billion. Time deposit balances increased $33 million while demand deposit balances decreased $94 million.
Average brokered deposits were 4% of total deposits during the first quarter of 2024. Average interest-bearing transaction accounts for the first quarter included $479 million of brokered deposits, a $167 million increase over the fourth quarter of 2023. Average time deposits for the first quarter of 2024 included $620 million of brokered deposits, a $9.5 million decrease compared to the fourth quarter of 2023. Period end brokered interest-bearing transaction accounts increased $489 million to $819 million at March 31, 2024 and brokered time deposits decreased $80 million to $492 million at March 31, 2024. During the first quarter, reciprocal deposit balances exceeded the $5 billion general cap as defined by the FDIC. Reciprocal deposit balances in excess of the $5 billion general cap are included as brokered deposits for regulatory reporting purposes. The portion of brokered deposits excluding the reciprocal component was 2% of total deposits.
- 32 -

The distribution of our period end deposit account balances among principal markets follows in Table 20.
Table 20 – Period End Deposits by Principal Market Area
(In thousands)

|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  | Sep. 30, 2023 |  | June 30, 2023 |  | Mar. 31, 2023
Oklahoma: |  |  |  |  |  |  |  |  |  |
Demand |  | $ | 3,365,529 |  |  | $ | 3,586,091 |  |  | $ | 4,019,019 |  |  | $ | 4,273,136 |  |  | $ | 4,369,944 |
Interest-bearing: |  |  |  |  |  |  |  |  |  |
Transaction |  | 12,362,193 |  |  | 10,929,704 |  |  | 9,970,955 |  |  | 9,979,534 |  |  | 9,468,100 |
Savings |  | 509,775 |  |  | 500,313 |  |  | 508,619 |  |  | 531,536 |  |  | 564,829 |
Time |  | 2,136,583 |  |  | 1,984,336 |  |  | 2,019,749 |  |  | 1,945,916 |  |  | 942,787 |
Total interest-bearing |  | 15,008,551 |  |  | 13,414,353 |  |  | 12,499,323 |  |  | 12,456,986 |  |  | 10,975,716 |
Total Oklahoma |  | 18,374,080 |  |  | 17,000,444 |  |  | 16,518,342 |  |  | 16,730,122 |  |  | 15,345,660 |
Texas: |  |  |  |  |  |  |  |  |  |
Demand |  | 2,201,561 |  |  | 2,306,334 |  |  | 2,599,998 |  |  | 2,876,568 |  |  | 3,154,789 |
Interest-bearing: |  |  |  |  |  |  |  |  |  |
Transaction |  | 5,125,834 |  |  | 5,035,856 |  |  | 5,046,288 |  |  | 4,532,093 |  |  | 4,366,932 |
Savings |  | 157,108 |  |  | 155,652 |  |  | 154,863 |  |  | 162,704 |  |  | 175,012 |
Time |  | 605,526 |  |  | 492,753 |  |  | 436,218 |  |  | 377,424 |  |  | 321,774 |
Total interest-bearing |  | 5,888,468 |  |  | 5,684,261 |  |  | 5,637,369 |  |  | 5,072,221 |  |  | 4,863,718 |
Total Texas |  | 8,090,029 |  |  | 7,990,595 |  |  | 8,237,367 |  |  | 7,948,789 |  |  | 8,018,507 |
Colorado: |  |  |  |  |  |  |  |  |  |
Demand |  | 1,316,971 |  |  | 1,633,672 |  |  | 1,598,622 |  |  | 1,726,130 |  |  | 1,869,194 |
Interest-bearing: |  |  |  |  |  |  |  |  |  |
Transaction |  | 1,951,232 |  |  | 1,921,605 |  |  | 1,888,026 |  |  | 1,825,295 |  |  | 2,126,435 |
Savings |  | 63,675 |  |  | 67,646 |  |  | 63,129 |  |  | 66,968 |  |  | 72,548 |
Time |  | 237,656 |  |  | 201,393 |  |  | 185,030 |  |  | 148,840 |  |  | 128,583 |
Total interest-bearing |  | 2,252,563 |  |  | 2,190,644 |  |  | 2,136,185 |  |  | 2,041,103 |  |  | 2,327,566 |
Total Colorado |  | 3,569,534 |  |  | 3,824,316 |  |  | 3,734,807 |  |  | 3,767,233 |  |  | 4,196,760 |
New Mexico: |  |  |  |  |  |  |  |  |  |
Demand |  | 683,643 |  |  | 794,467 |  |  | 853,571 |  |  | 912,218 |  |  | 997,364 |
Interest-bearing: |  |  |  |  |  |  |  |  |  |
Transaction |  | 1,085,946 |  |  | 886,089 |  |  | 1,049,903 |  |  | 712,541 |  |  | 674,328 |
Savings |  | 95,944 |  |  | 95,453 |  |  | 97,753 |  |  | 102,729 |  |  | 111,771 |
Time |  | 298,556 |  |  | 258,195 |  |  | 217,535 |  |  | 179,548 |  |  | 137,875 |
Total interest-bearing |  | 1,480,446 |  |  | 1,239,737 |  |  | 1,365,191 |  |  | 994,818 |  |  | 923,974 |
Total New Mexico |  | 2,164,089 |  |  | 2,034,204 |  |  | 2,218,762 |  |  | 1,907,036 |  |  | 1,921,338 |
Arizona: |  |  |  |  |  |  |  |  |  |
Demand |  | 502,143 |  |  | 524,167 |  |  | 522,142 |  |  | 592,144 |  |  | 780,051 |
Interest-bearing: |  |  |  |  |  |  |  |  |  |
Transaction |  | 1,181,539 |  |  | 1,174,715 |  |  | 903,535 |  |  | 800,970 |  |  | 687,527 |
Savings |  | 12,024 |  |  | 11,636 |  |  | 12,340 |  |  | 14,489 |  |  | 16,993 |
Time |  | 46,962 |  |  | 41,884 |  |  | 36,689 |  |  | 31,248 |  |  | 27,755 |
Total interest-bearing |  | 1,240,525 |  |  | 1,228,235 |  |  | 952,564 |  |  | 846,707 |  |  | 732,275 |
Total Arizona |  | 1,742,668 |  |  | 1,752,402 |  |  | 1,474,706 |  |  | 1,438,851 |  |  | 1,512,326 |

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|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  | Sep. 30, 2023 |  | June 30, 2023 |  | Mar. 31, 2023
Kansas/Missouri: |  |  |  |  |  |  |  |  |  |
Demand |  | 316,041 |  |  | 326,496 |  |  | 351,236 |  |  | 363,534 |  |  | 393,321 |
Interest-bearing: |  |  |  |  |  |  |  |  |  |
Transaction |  | 985,706 |  |  | 966,166 |  |  | 981,091 |  |  | 1,014,247 |  |  | 1,040,009 |
Savings |  | 13,095 |  |  | 13,821 |  |  | 14,331 |  |  | 16,316 |  |  | 18,292 |
Time |  | 30,411 |  |  | 23,955 |  |  | 22,437 |  |  | 16,176 |  |  | 13,061 |
Total interest-bearing |  | 1,029,212 |  |  | 1,003,942 |  |  | 1,017,859 |  |  | 1,046,739 |  |  | 1,071,362 |
Total Kansas/Missouri |  | 1,345,253 |  |  | 1,330,438 |  |  | 1,369,095 |  |  | 1,410,273 |  |  | 1,464,683 |
Arkansas: |  |  |  |  |  |  |  |  |  |
Demand |  | 28,168 |  |  | 25,266 |  |  | 29,635 |  |  | 38,818 |  |  | 42,312 |
Interest-bearing: |  |  |  |  |  |  |  |  |  |
Transaction |  | 55,735 |  |  | 49,966 |  |  | 57,381 |  |  | 43,301 |  |  | 71,158 |
Savings |  | 2,776 |  |  | 2,564 |  |  | 2,898 |  |  | 3,195 |  |  | 3,228 |
Time |  | 11,215 |  |  | 9,506 |  |  | 9,559 |  |  | 7,225 |  |  | 4,775 |
Total interest-bearing |  | 69,726 |  |  | 62,036 |  |  | 69,838 |  |  | 53,721 |  |  | 79,161 |
Total Arkansas |  | 97,894 |  |  | 87,302 |  |  | 99,473 |  |  | 92,539 |  |  | 121,473 |
Total BOK Financial deposits |  | $ | 35,383,547 |  |  | $ | 34,019,701 |  |  | $ | 33,652,552 |  |  | $ | 33,294,843 |  |  | $ | 32,580,747 |

Estimated uninsured deposits totaled $18.2 billion or 51% of our total deposits at March 31, 2024. In addition to insured deposits, we also hold $4.5 billion of collateralized deposits. Municipalities, Native American tribal governments and certain trust-related deposits are all required to be collateralized. Excluding the impact of collateralized deposits and deposits related to consolidated subsidiaries, our uninsured and uncollateralized deposit level is $13.2 billion or 37% of total deposits at March 31, 2024.
In addition to deposits, liquidity is provided primarily by federal funds purchased, securities repurchase agreements and Federal Home Loan Banks borrowings. Federal funds purchased consist primarily of unsecured, overnight funds acquired from other financial institutions. Funds are primarily purchased from bankers' banks and Federal Home Loan Banks from across the country. The largest single source of wholesale federal funds purchased totaled $250 million at March 31, 2024. Securities repurchase agreements generally mature within 90 days and are secured by certain available for sale and trading securities. Federal Home Loan Banks borrowings are generally short-term and are secured by a blanket pledge of eligible collateral (generally unencumbered U.S. Treasury and agency mortgage-backed securities, 1-4 family residential mortgage loans, multifamily and other qualifying commercial real estate loans). Amounts borrowed from the Federal Home Loan Bank of Topeka averaged $6.8 billion during the quarter, compared to $7.1 billion in the fourth quarter of 2023.
At March 31, 2024, management estimates a total potential secured borrowing capacity of approximately $23.7 billion. This includes current available secured capacity of $20.0 billion from the use of programs available to U.S. banks from the Federal Home Loan Banks and Federal Reserve Banks and an estimated $3.7 billion of other sources that could be converted into additional secured capacity.
A summary of other borrowings for BOK Financial on a consolidated basis follows in Table 21.
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Table 21 – Borrowed Funds
(Dollars in thousands)

|  |  |  | Three Months Ended March 31, 2024 |  |  |  | Three Months Ended Dec. 31, 2023
|  | Mar. 31, 2024 |  | Average Balance During the Quarter |  | Rate |  | Maximum Outstanding At Any Month End During the Quarter |  | Dec. 31, 2023 |  | Average Balance During the Quarter |  | Rate |  | Maximum Outstanding At Any Month End During the Quarter
Funds purchased |  | $ | 899,447 |  |  | $ | 582,505 |  |  | 4.76 | % |  | $ | 899,447 |  |  | $ | 515,747 |  |  | $ | 438,028 |  |  | 4.71 | % |  | $ | 515,747 |
Repurchase agreements |  | 362,070 |  |  | 675,539 |  |  | 3.43 | % |  | 362,070 |  |  | 607,001 |  |  | 2,038,945 |  |  | 4.81 | % |  | 1,041,432 |
Other borrowings: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Federal Home Loan Banks advances |  | 6,700,000 |  |  | 6,819,232 |  |  | 5.56 | % |  | 6,700,000 |  |  | 7,675,000 |  |  | 7,094,294 |  |  | 5.54 | % |  | 7,825,000 |
GNMA repurchase liability |  | 10,414 |  |  | 10,953 |  |  | 4.00 | % |  | 10,805 |  |  | 11,660 |  |  | 11,075 |  |  | 4.16 | % |  | 11,726 |
Other |  | 14,238 |  |  | 14,448 |  |  | 5.26 | % |  | 14,800 |  |  | 14,892 |  |  | 15,594 |  |  | 6.31 | % |  | 15,896 |
Total other borrowings |  | 6,724,652 |  |  | 6,844,633 |  |  | 5.56 | % |  |  |  | 7,701,552 |  |  | 7,120,963 |  |  | 5.55 | % |  |
Subordinated debentures 1 |  | 131,154 |  |  | 131,154 |  |  | 7.09 | % |  | 131,154 |  |  | 131,150 |  |  | 131,151 |  |  | 7.09 | % |  | 131,151 |
Total other borrowed funds and subordinated debentures |  | $ | 8,117,323 |  |  | $ | 8,233,831 |  |  | 5.35 | % |  |  |  | $ | 8,955,450 |  |  | $ | 9,729,087 |  |  | 5.37 | % |  |

1 Parent Company only.
BOKF, NA also has a liability related to the repurchase of certain delinquent residential mortgage loans previously sold into GNMA mortgage pools. Interest is payable monthly at rates contractually due to investors if delinquent loans are not repurchased from the GNMA mortgage pools.
Parent Company
At March 31, 2024, cash and interest-bearing cash and cash equivalents held by the parent company totaled $183 million. The primary sources of liquidity for BOK Financial are cash on hand and dividends from BOKF, NA. Dividends from the bank are limited by various banking regulations to net profits, as defined, for the year plus retained profits for the two preceding years. Dividends are further restricted by minimum capital requirements. At March 31, 2024, based upon the most restrictive limitations as well as management's internal capital policy, BOKF, NA could declare up to $354 million of dividends. Dividend constraints may be alleviated through increases in retained earnings, capital issuances or changes in risk weighted assets. Future losses or increases in required regulatory capital at the bank could affect its ability to pay dividends to the parent company.
Our equity capital at March 31, 2024 was $5.1 billion, a $14 million decrease compared to December 31, 2023. Net income less cash dividends paid increased equity $48 million during the first quarter of 2024. Changes in interest rates resulted in an $11 million decrease in accumulated other comprehensive income compared to December 31, 2023. We also repurchased $52 million of common stock, excluding a 1% excise tax on corporate stock repurchases, during the first quarter of 2024. Capital is managed to maximize long-term value to the shareholders. Factors considered in managing capital include projections of future earnings including expected benefits from lower federal income tax rates, asset growth and acquisition strategies, and regulatory and debt covenant requirements. Capital management may include subordinated debt or perpetual preferred stock issuance, share repurchase and stock and cash dividends.
On November 1, 2022, the board of directors authorized the Company to purchase up to five million common shares, subject to market conditions, securities law and other regulatory compliance limitations. As of March 31, 2024, the Company had repurchased 3,044,844 shares under this authorization. The Company repurchased 616,630 shares of common stock at an average price of $83.89 per share in the first quarter of 2024. We view share buybacks opportunistically, but within the context of maintaining our strong capital position.
- 35 -

BOK Financial and BOKF, NA are subject to various capital requirements administered by federal agencies. Failure to meet minimum capital requirements can result in certain mandatory and possibly additional discretionary actions by regulators that could have a material impact on operations. These capital requirements include quantitative measures of assets, liabilities and off-balance sheet items. The capital standards are also subject to qualitative judgments by the regulators.
A summary of minimum capital requirements, including a capital conservation buffer follows in Table 22. A bank which falls below these levels, including the capital conservation buffer, would be subject to regulatory restrictions on capital distributions (including, but not limited to, dividends and share repurchases) and executive bonus payments.
In March 2020, in response to the impact on the financial markets by the COVID-19 pandemic, the banking agencies issued an interim final rule permitting banking organizations that implement the CECL model the option to delay for two years an estimate of the CECL methodology's effect on regulatory capital, followed by a three-year transition period. The estimate includes the implementation date adjustment as of January 1, 2020 plus an estimate of the impact of the change for a two year period following implementation of CECL. We elected to delay the regulatory capital impact of the transition in accordance with the interim final rule. Deferral of the impact of CECL added 3 basis points to the Company's Common equity Tier 1 capital at March 31, 2024.
Capital and other performance ratios for BOK Financial on a consolidated basis are presented in Table 22.
Table 22 – Capital and Performance Ratios

|  | Minimum Capital Requirement |  | Capital Conservation Buffer |  | Minimum Capital Requirement Including Capital Conservation Buffer |  | Mar. 31, 2024 |  | Dec. 31, 2023 |  | Mar. 31, 2023
Capital: |  |  |  |  |  |  |  |  |  |  |  |
Common equity Tier 1 |  | 4.50 | % |  | 2.50 | % |  | 7.00 | % |  | 11.99 | % |  | 12.06 | % |  | 12.19 | %
Tier 1 capital |  | 6.00 | % |  | 2.50 | % |  | 8.50 | % |  | 12.00 | % |  | 12.07 | % |  | 12.20 | %
Total capital |  | 8.00 | % |  | 2.50 | % |  | 10.50 | % |  | 13.15 | % |  | 13.16 | % |  | 13.21 | %
Tier 1 Leverage |  | 4.00 | % |  | N/A |  | 4.00 | % |  | 9.42 | % |  | 9.45 | % |  | 9.94 | %
Average total equity to average assets |  |  |  |  |  |  |  | 10.30 | % |  | 9.93 | % |  | 10.53 | %
Tangible common equity ratio 1 |  |  |  |  |  |  |  | 8.21 | % |  | 8.29 | % |  | 8.46 | %
Adjusted common tangible equity ratio 1 |  |  |  |  |  |  |  | 7.92 | % |  | 8.02 | % |  | 8.22 | %
Performance Ratios: |  |  |  |  |  |  |  |  |  |  |  |
Return on average equity |  |  |  |  |  |  |  | 6.53 | % |  | 6.64 | % |  | 13.61 | %
Return on average tangible common equity 1 |  |  |  |  |  |  |  | 8.31 | % |  | 8.56 | % |  | 17.71 | %

1 See Explanation and Reconciliation of Non-GAAP Measures following.
Off-Balance Sheet Arrangements
See Note 4 to the Consolidated Financial Statements for a discussion of the Company's significant off-balance sheet commitments.
- 36 -

Explanation and Reconciliation of Non-GAAP Measures
Table 23 provides a reconciliation of the non-GAAP measures with financial measures defined by GAAP.
Table 23 – Non-GAAP Measures
(Dollars in thousands)

|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  | Sep. 30, 2023 |  | June 30, 2023 |  | Mar. 31, 2023
Reconciliation of tangible common equity ratio and adjusted tangible common equity ratio:
Total shareholders' equity |  | $ | 5,128,751 |  |  | $ | 5,142,442 |  |  | $ | 4,814,019 |  |  | $ | 4,863,854 |  |  | $ | 4,874,786 |
Less: Goodwill and intangible assets, net |  | 1,101,643 |  |  | 1,104,728 |  |  | 1,110,553 |  |  | 1,113,995 |  |  | 1,117,438 |
Tangible common equity |  | 4,027,108 |  |  | 4,037,714 |  |  | 3,703,466 |  |  | 3,749,859 |  |  | 3,757,348 |
Add: Unrealized loss on investment securities, net |  | (185,978) |  |  | (171,903) |  |  | (246,395) |  |  | (189,152) |  |  | (140,947) |
Add: Tax effect on unrealized loss on investment securities, net |  | 43,740 |  |  | 40,430 |  |  | 57,949 |  |  | 44,486 |  |  | 33,149 |
Adjusted tangible common equity |  | $ | 3,884,870 |  |  | $ | 3,906,241 |  |  | $ | 3,515,020 |  |  | $ | 3,605,193 |  |  | $ | 3,649,550 |
Total assets |  | $ | 50,160,380 |  |  | $ | 49,824,830 |  |  | $ | 48,931,397 |  |  | $ | 49,237,920 |  |  | $ | 45,524,122 |
Less: Goodwill and intangible assets, net |  | 1,101,643 |  |  | 1,104,728 |  |  | 1,110,553 |  |  | 1,113,995 |  |  | 1,117,438 |
Tangible assets |  | $ | 49,058,737 |  |  | $ | 48,720,102 |  |  | $ | 47,820,844 |  |  | $ | 48,123,925 |  |  | $ | 44,406,684 |
Tangible common equity ratio |  | 8.21 | % |  | 8.29 | % |  | 7.74 | % |  | 7.79 | % |  | 8.46 | %
Adjusted tangible common equity ratio |  | 7.92 | % |  | 8.02 | % |  | 7.35 | % |  | 7.49 | % |  | 8.22 | %
Reconciliation of return on average tangible common equity:
Total average shareholders' equity |  | $ | 5,152,061 |  |  | $ | 4,933,917 |  |  | $ | 4,902,119 |  |  | $ | 4,941,352 |  |  | $ | 4,837,567 |
Less: Average goodwill and intangible assets, net |  | 1,103,090 |  |  | 1,107,949 |  |  | 1,112,217 |  |  | 1,115,652 |  |  | 1,119,123 |
Average tangible common equity |  | $ | 4,048,971 |  |  | $ | 3,825,968 |  |  | $ | 3,789,902 |  |  | $ | 3,825,700 |  |  | $ | 3,718,444 |
Net Income |  | $ | 83,703 |  |  | $ | 82,575 |  |  | $ | 134,495 |  |  | $ | 151,308 |  |  | $ | 162,368 |
Return on average tangible common equity |  | 8.31 | % |  | 8.56 | % |  | 14.08 | % |  | 15.86 | % |  | 17.71 | %
Reconciliation of pre-provision net revenue: |  |  |  |  |  |  |  |  |  |
Net income before taxes |  | $ | 106,889 |  |  | $ | 111,475 |  |  | $ | 167,735 |  |  | $ | 195,637 |  |  | $ | 208,401 |
Add: Provision for expected credit losses |  | 8,000 |  |  | 6,000 |  |  | 7,000 |  |  | 17,000 |  |  | 16,000 |
Less: Net income (loss) attributable to non-controlling interests |  | (9) |  |  | (53) |  |  | (16) |  |  | 328 |  |  | 128 |
Pre-provision net revenue |  | $ | 114,898 |  |  | $ | 117,528 |  |  | $ | 174,751 |  |  | $ | 212,309 |  |  | $ | 224,273 |
Reconciliation of adjusted net income and earnings per share:
Net income |  | $ | 83,703 |  |  | $ | 82,575 |  |  | $ | 134,495 |  |  | $ | 151,308 |  |  | $ | 162,368 |
Add: FDIC special assessment, net of tax |  | 4,936 |  |  | 33,478 |  |  | — |  |  | — |  |  | — |
Less: Loss on repositioning of available for sale securities, net of tax |  | (34,547) |  |  | (21,129) |  |  | — |  |  | (2,302) |  |  | — |
Less: Gain on sale of BOKF Insurance, net of tax |  | — |  |  | 23,715 |  |  | — |  |  | — |  |  | — |
Adjusted net income |  | 123,186 |  |  | 113,467 |  |  | 134,495 |  |  | 153,610 |  |  | 162,368 |
Earnings per share |  | $ | 1.29 |  |  | $ | 1.26 |  |  | $ | 2.04 |  |  | $ | 2.27 |  |  | $ | 2.43 |
Add: FDIC special assessment, net of tax |  | 0.08 |  |  | 0.52 |  |  | — |  |  | — |  |  | — |
Less: Loss on repositioning of available for sale securities, net of tax |  | (0.54) |  |  | (0.33) |  |  | — |  |  | (0.03) |  |  | — |
Less: Gain on sale of BOKF Insurance, net of tax |  | — |  |  | 0.37 |  |  | — |  |  | — |  |  | — |
Adjusted earnings per share |  | $ | 1.91 |  |  | $ | 1.74 |  |  | $ | 2.04 |  |  | $ | 2.30 |  |  | $ | 2.43 |

- 37 -

|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  | Sep. 30, 2023 |  | June 30, 2023 |  | Mar. 31, 2023
Calculation of efficiency ratio and efficiency ratio excluding adjustments:
Total other operating expense |  | $ | 340,384 |  |  | $ | 384,083 |  |  | $ | 324,313 |  |  | $ | 318,673 |  |  | $ | 305,812 |
Less: Amortization of intangible assets |  | 3,003 |  |  | 3,543 |  |  | 3,474 |  |  | 3,474 |  |  | 3,391 |
Numerator for efficiency ratio |  | $ | 337,381 |  |  | $ | 380,540 |  |  | $ | 320,839 |  |  | $ | 315,199 |  |  | $ | 302,421 |
Less: FDIC special assessment |  | 6,454 |  |  | 43,773 |  |  | — |  |  | — |  |  | — |
Less: Expenses related to sale of BOKF Insurance |  | — |  |  | 3,436 |  |  | — |  |  | — |  |  | — |
Adjusted numerator for efficiency ratio |  | $ | 330,927 |  |  | $ | 333,331 |  |  | $ | 320,839 |  |  | $ | 315,199 |  |  | $ | 302,421 |
Net interest revenue |  | $ | 293,572 |  |  | $ | 296,675 |  |  | $ | 300,896 |  |  | $ | 322,261 |  |  | $ | 352,348 |
Tax-equivalent adjustment |  | 2,100 |  |  | 2,112 |  |  | 2,214 |  |  | 2,200 |  |  | 2,285 |
Tax-equivalent net interest revenue |  | 295,672 |  |  | 298,787 |  |  | 303,110 |  |  | 324,461 |  |  | 354,633 |
Total other operating revenue |  | 161,701 |  |  | 204,883 |  |  | 198,152 |  |  | 209,049 |  |  | 177,865 |
Less: Loss on available for sale securities, net |  | (45,171) |  |  | (27,626) |  |  | — |  |  | (3,010) |  |  | — |
Denominator for efficiency ratio |  | $ | 502,544 |  |  | $ | 531,296 |  |  | $ | 501,262 |  |  | $ | 536,520 |  |  | $ | 532,498 |
Less: Gain on sale of BOKF Insurance |  | — |  |  | 31,007 |  |  | — |  |  | — |  |  | — |
Adjusted denominator for efficiency ratio |  | $ | 502,544 |  |  | $ | 500,289 |  |  | $ | 501,262 |  |  | $ | 536,520 |  |  | $ | 532,498 |
Efficiency ratio |  | 67.13 | % |  | 71.62 | % |  | 64.01 | % |  | 58.75 | % |  | 56.79 | %
Efficiency ratio excluding adjustments |  | 65.85 | % |  | 66.63 | % |  | 64.01 | % |  | 58.75 | % |  | 56.79 | %
Information on net interest revenue and net interest margin excluding trading activities:
Net interest revenue |  | $ | 293,572 |  |  | $ | 296,675 |  |  | $ | 300,896 |  |  | $ | 322,261 |  |  | $ | 352,348 |
Less: Trading activities net interest revenue |  | (498) |  |  | (3,305) |  |  | (7,343) |  |  | (3,461) |  |  | 70 |
Net interest revenue excluding trading activities |  | $ | 294,070 |  |  | $ | 299,980 |  |  | $ | 308,239 |  |  | $ | 325,722 |  |  | $ | 352,278 |
Tax-equivalent adjustment |  | 2,100 |  |  | 2,112 |  |  | 2,214 |  |  | 2,200 |  |  | 2,285 |
Tax-equivalent net interest revenue excluding trading activities |  | $ | 296,170 |  |  | $ | 302,092 |  |  | $ | 310,453 |  |  | $ | 327,922 |  |  | $ | 354,563 |
Average interest-earning assets |  | $ | 44,846,886 |  |  | $ | 44,327,237 |  |  | $ | 44,012,300 |  |  | $ | 42,731,533 |  |  | $ | 40,781,257 |
Less: Average trading activities interest-earning assets |  | 5,371,209 |  |  | 5,448,403 |  |  | 5,444,587 |  |  | 4,274,803 |  |  | 3,031,969 |
Average interest-earning assets excluding trading activities |  | $ | 39,475,677 |  |  | $ | 38,878,834 |  |  | $ | 38,567,713 |  |  | $ | 38,456,730 |  |  | $ | 37,749,288 |
Net interest margin on average interest-earning assets |  | 2.61 | % |  | 2.64 | % |  | 2.69 | % |  | 3.00 | % |  | 3.45 | %
Net interest margin on average trading activities interest-earning assets |  | (0.07) | % |  | (0.20) | % |  | (0.49) | % |  | (0.34) | % |  | — | %
Net interest margin on average interest-earning assets excluding trading activities |  | 2.97 | % |  | 3.03 | % |  | 3.14 | % |  | 3.36 | % |  | 3.72 | %

Explanation of Non-GAAP Measures
The tangible common equity ratio and return on average tangible common equity are primarily based on total shareholders' equity, which includes unrealized gains and losses on available for sale securities, less intangible assets and equity that do not benefit common shareholders. The adjusted tangible common equity ratio also includes unrealized gains and losses on the investment portfolio. These measures are valuable indicators of a financial institution's capital strength since they eliminate intangible assets from shareholders' equity and retain the effect of unrealized losses on securities and other components of accumulated other comprehensive income in shareholders' equity.
Pre-provision net revenue is a measure of revenue less expenses and is calculated before provision for credit losses and income tax expense. This financial measure is frequently used by investors and analysts and enables them to assess a company's ability to generate earnings to cover credit losses through a credit cycle. It also provides an additional basis for comparing the results of operations between periods by isolating the impact of the provision for credit losses, which can vary significantly between periods.
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We believe adjusting net income and earnings per share for notable non-core items enhances comparability of results with prior periods, demonstrates the impact of significant items and provides a useful measure for determining the Company's expenses that are core to our business operations and are expected to recur over time.
The efficiency ratio measures the Company's ability to use its assets and manage its liabilities effectively in the current period. Prior to the second quarter of 2023, the efficiency ratio did not exclude amortization of intangible assets and only included tax-equivalent net interest revenue and fees and commissions as part of total revenue. All prior periods were adjusted to conform with the current methodology.
Net interest revenue and net interest margin excluding trading activities remove the effect of trading activities on these metrics allowing management and investors to assess the performance of the Company's core lending and deposit activities without the associated volatility from trading activities.
Market Risk
Market risk is a broad term for the risk of economic loss due to adverse changes in the fair value of a financial instrument. These changes may be the result of various factors, including interest rates, foreign exchange rates, commodity prices or equity prices. Financial instruments that are subject to market risk can be classified either as held for trading or held for purposes other than trading. Market risk excludes changes in fair value due to the credit of the individual issuers of financial instruments.
BOK Financial is subject to market risk primarily through the effect of changes in interest rates on both its assets held for purposes other than trading and trading assets. The effects of other changes, such as foreign exchange rates, commodity prices or equity prices do not pose significant market risk to BOK Financial. BOK Financial has no material investments in assets that are affected by changes in foreign exchange rates or equity prices. Energy and agricultural product derivative contracts, which are affected by changes in commodity prices, are matched against offsetting contracts as previously discussed.
The Asset/Liability Committee is responsible for managing market risk in accordance with policy limits established by the Board of Directors. The Committee monitors projected variation in net interest revenue, net income and economic value of equity due to specified changes in interest rates. These limits also set maximum levels for short-term borrowings, short-term assets, public funds and brokered deposits and establish minimum levels for unpledged assets, among other things. Further, the Board has approved market risk limits for fixed income trading, mortgage pipeline and mortgage servicing assets inclusive of economic hedge benefits. Exposure is measured daily and compliance is reviewed monthly. Deviations from the Board approved limits, which periodically occur throughout the reporting period, may require management to develop and execute plans to reduce exposure. These plans are subject to escalation to and approval by the Board.
The simulations used to manage market risk are based on numerous assumptions regarding the effects of changes in interest rates on the timing and extent of repricing characteristics, future cash flows and customer behavior. These assumptions are inherently uncertain and, as a result, models cannot precisely estimate or precisely predict the impact of higher or lower interest rates. Actual results will differ from simulated results due to timing, magnitude and frequency of interest rate changes, market conditions and management strategies, among other factors.
Interest Rate Risk – Other than Trading
As previously noted in the Net Interest Revenue section of this report, management has implemented strategies to manage the Company's balance sheet exposure to changes in interest rates over a twelve-month period within established policy limits. The effectiveness of these strategies in managing the overall interest rate risk is evaluated through the use of an asset/liability model. BOK Financial performs a sensitivity analysis to identify more dynamic interest rate risk exposures, including embedded option positions, on net interest revenue. A simulation model is used to estimate the effect of changes in interest rates on our performance across multiple interest rate scenarios. Our current internal policy limit for net interest revenue variation due to a 200 basis point parallel change in market interest rates over twelve months is a maximum decline of 6.5%. Management also reviews alternative rate changes and time periods.
- 39 -

The Company's primary interest rate exposures include the Federal Funds rate, which affects short-term borrowings, and the prime lending rate, SOFR, which is the basis for much of the variable rate loan pricing. Additionally, residential mortgage rates directly affect the prepayment speeds for residential mortgage-backed securities and mortgage servicing rights. Derivative financial instruments and other financial instruments used for purposes other than trading are included in this simulation. In addition, the impact on the level and composition of demand deposit accounts and other core deposit balances resulting from a significant increase in short-term market interest rates and the overall interest rate environment is likely to be material. The simulation incorporates assumptions regarding the effects of such changes based on a combination of historical analysis and expected behavior. The impact of planned growth and new business activities is factored into the simulation model.
The interest rate sensitivity in Table 24 indicates management's estimation of the impact of rate changes on net interest revenue. Should deposit costs be 10% more sensitive to changes in rates, the variation in net interest revenue over the next twelve months would be 0.42% for the 100 basis point decrease scenario. Alternatively, should deposit funding costs be 10% less sensitive to changes in rates, the variation in net interest revenue over the next twelve months would be (0.80)%, or ($10.4 million) for the 100 basis point decrease scenario. Additionally, in a flattening yield curve scenario where long-term rates increase by 100 basis points and short-term rates increase by 200 basis points, net interest revenue would decrease approximately 4.78%, or $62 million.
Table 24 – Interest Rate Sensitivity
(Dollars in thousands)

|  | Mar. 31, 2024 |  | Dec. 31, 2023
|  | 200 bp Increase |  | 100 bp Increase |  | 100 bp Decrease |  | 200 bp Decrease |  | 200 bp Increase |  | 100 bp Increase |  | 100 bp Decrease |  | 200 bp Decrease
Anticipated impact over the next twelve months on net interest revenue |  | $ | (29,900) |  |  | $ | (4,600) |  |  | $ | (2,500) |  |  | $ | 900 |  |  | $ | (36,100) |  |  | $ | (8,900) |  |  | $ | (7,900) |  |  | $ | (2,900) |
|  | (2.31) | % |  | (0.35) | % |  | (0.20) | % |  | 0.07 | % |  | (3.03) | % |  | (0.75) | % |  | (0.66) | % |  | (0.24) | %
Anticipated impact over months twelve through twenty-four |  | $ | (3,400) |  |  | $ | 20,800 |  |  | $ | (38,600) |  |  | $ | (62,500) |  |  | $ | (9,600) |  |  | $ | 15,300 |  |  | $ | (53,700) |  |  | $ | (84,900) |
|  | (0.24) | % |  | 1.46 | % |  | (2.70) | % |  | (4.37) | % |  | (0.74) | % |  | 1.18 | % |  | (4.16) | % |  | (6.57) | %

BOK Financial is also subjected to market risk through changes in the fair value of mortgage servicing rights. Changes in the fair value of mortgage servicing rights are highly dependent on changes in primary mortgage rates offered to borrowers, intermediate-term interest rates that affect the value of custodial funds, and assumptions about servicing revenues, servicing costs and discount rates. As primary mortgage rates increase, prepayment speeds slow and the value of our mortgage servicing rights increases. As primary mortgage rates fall, prepayment speeds increase and the value of our mortgage servicing rights decreases.
We maintain a portfolio of financial instruments which may include debt securities issued by the U.S. government or its agencies and interest rate derivative contracts, held as an economic hedge of the changes in the fair value of our mortgage servicing rights. Composition of this portfolio will change based on our assessment of market risk. Changes in the fair value of residential mortgage-backed securities are highly dependent on changes in secondary mortgage rates required by investors, and interest rate derivative contracts are highly dependent on changes in other market interest rates. While primary and secondary mortgage rates generally move in the same direction, the spread between them may widen and narrow due to market conditions and government intervention. Changes in the forward-looking spread between the primary and secondary rates can cause significant earnings volatility.
Management performs a stress test to measure market risk due to changes in interest rates inherent in its MSR portfolio and hedges. The stress test shocks applicable interest rates up and down 50 basis points and calculates an estimated change in fair value, net of economic hedging activity, that may result. The Board has approved a $20 million market risk limit for mortgage servicing rights, net of economic hedges.
- 40 -

Table 25 – MSR Asset and Hedge Sensitivity Analysis
(In thousands)

|  | Mar. 31, 2024 |  | Dec. 31, 2023
|  | Up 50 bp |  | Down 50 bp |  | Up 50 bp |  | Down 50 bp
MSR Asset |  | $ | 8,840 |  |  | $ | (10,181) |  |  | $ | 7,974 |  |  | $ | (9,877) |
MSR Hedge |  | (9,131) |  |  | 9,295 |  |  | (8,444) |  |  | 8,606 |
Net Exposure |  | (291) |  |  | (886) |  |  | (470) |  |  | (1,271) |

Trading Activities
The Company bears market risk by originating RMHFS. RMHFS are generally outstanding for 60 to 90 days, which represents the typical period from commitment to originate a loan to sale of the closed loan to an investor. Primary mortgage interest rate changes during this period affect the value of RMHFS commitments and loans. We use forward sale contracts to mitigate market risk on all closed mortgage loans held for sale and on an estimate of mortgage loan commitments that are expected to result in closed loans.
A variety of methods are used to monitor market risk of mortgage origination activities. These methods include daily marking of all positions to market value, independent verification of inventory pricing, and revenue sensitivity limits.
Management performs a stress test to measure market risk due to changes in interest rates inherent in the mortgage production pipeline. The stress test shocks applicable interest rates up and down 50 basis points and calculates an estimated change in fair value, net of economic hedging activity that may result. The Board has approved a $7 million market risk limit for the mortgage production pipeline, net of forward sale contracts.
Table 26 – Mortgage Pipeline Sensitivity Analysis
(In thousands)

|  | Three Months Ended |  |
|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  | Mar. 31, 2023 |  |  |  |
|  | Up 50 bp |  | Down 50 bp |  | Up 50 bp |  | Down 50 bp |  | Up 50 bp |  | Down 50 bp |  |  |  |  |  |  |  |
Average 1 |  | $ | (36) |  |  | $ | (19) |  |  | $ | (17) |  |  | $ | (21) |  |  | $ | (79) |  |  | $ | (16) |  |  |  |  |  |  |  |  |
Low 2 |  | 93 |  |  | 126 |  |  | 22 |  |  | 46 |  |  | (1) |  |  | 61 |  |  |  |  |  |  |  |  |
High 3 |  | (240) |  |  | (151) |  |  | (91) |  |  | (58) |  |  | (186) |  |  | (84) |  |  |  |  |  |  |  |  |
Period End |  | (154) |  |  | 52 |  |  | 14 |  |  | (41) |  |  | (74) |  |  | (19) |  |  |  |  |  |  |  |  |

1 Average represents the simple average of each daily value observed during the reporting period.
2 Low represents least risk of loss in fair value measured as the smallest negative value or the largest positive value observed daily during the reporting period.
3 High represents the greatest risk of loss in fair value measured as the largest negative value or the smallest positive value observed daily during the reporting period.
BOK Financial enters into trading activities both as an intermediary for customers and for its own account. As an intermediary, we take positions in securities, generally residential mortgage-backed securities, government agency securities and municipal bonds. These securities are purchased for resale to customers, which include individuals, corporations, foundations and financial institutions. On a limited basis, we may also take trading positions in U.S. Treasury securities, residential mortgage-backed securities, and municipal bonds to enhance returns on securities portfolios. Both of these activities involve interest rate risk, liquidity risk and price risk.
A variety of methods are used to monitor and manage the market risk of trading activities. These methods include daily marking of all positions to market value, independent verification of inventory pricing, and position limits for each trading activity. Risk management tools include VaR, stress testing and sensitivity analysis. Economic hedges in either the futures or cash markets may be used to reduce the risk associated with some trading programs. Basis risk can result when trading asset values and the instruments used to hedge them move at different rates.
VaR measures the potential loss of a given position or portfolio of positions at a specified confidence level and time horizon. BOK Financial utilizes a historical VaR methodology to measure and aggregate risks across its covered trading positions. For Market Risk Rule purposes, the Company calculates VaR using a historical simulation approach and measures the potential trading losses using a 10-day holding period and a 99% confidence level.
- 41 -

Due to inherent limitations of the VaR methodology, including its reliance on past market behavior, which might not be indicative of future market performance, VaR is only one of several tools used to measure and manage market risk. Other tools used to actively manage market risk include stress testing (SVaR) and sensitivity analysis.
SVaR is calculated using the same internal models as used for the VaR-based measure. SVaR is calculated over a ten-day holding period at a one-tail, 99% confidence level and employs a historical simulation approach based on a continuous twelve-month historical window selected to reflect a period of significant financial stress for the Company's trading portfolio.
The trading portfolio's VaR and SVaR profiles are influenced by a variety of factors, including the size and composition of the portfolio, market volatility, and the correlation between different positions. A portfolio of trading positions is typically less risky than the sum of the risk from each of the individual sub-portfolios because, under normal market conditions, risk within each category partially offsets the exposure to other risk categories. Table 27 below summarizes certain VaR and SVaR based measures for the three months ended March 31, 2024, December 31, 2023, and March 31, 2023.
Table 27 – VaR and SVaR Measures
(In thousands)

|  | Three Months Ended |
|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  | Mar. 31, 2023 |  |  |
|  | 10 day 99% VaR |  | 10 day 99% SVaR |  | 10 day 99% VaR |  | 10 day 99% SVaR |  | 10 day 99% VaR |  | 10 day 99% SVaR |  |  |  |  |  |  |
Average 1 |  | $ | 5,053 |  |  | $ | 6,388 |  |  | $ | 4,757 |  |  | $ | 8,154 |  |  | $ | 4,059 |  |  | $ | 7,461 |  |  |  |  |  |  |  |
Low |  | 2,634 |  |  | 4,190 |  |  | 2,338 |  |  | 4,067 |  |  | 1,944 |  |  | 3,156 |  |  |  |  |  |  |  |
High |  | 8,149 |  |  | 8,268 |  |  | 7,776 |  |  | 13,045 |  |  | 8,487 |  |  | 15,571 |  |  |  |  |  |  |  |
Period End |  | 4,677 |  |  | 4,931 |  |  | 2,977 |  |  | 4,925 |  |  | 4,036 |  |  | 8,907 |  |  |  |  |  |  |  |

1 Average represents the simple average of each daily value observed during the reporting period.
The Company monitors the accuracy of internal VaR models and modeling processes by back-testing model performance. The Company updates historical data used by the VaR model on a regular basis, and model validators independent of business lines perform regular validations to access model input, processing, and reporting components. These models are required to be independently validated and approved prior to implementation.
Limit Structure
Beyond VaR and SVaR described above, Management also performs a sensitivity analysis to measure market risk from changes in interest rates on its trading portfolio. Applicable interest rates are shocked up and down 50 basis points, calculating an estimated change in fair value, net of economic hedging activity that may result. The Board has approved an $11 million market risk limit for the trading portfolio, net of economic hedges.
Table 28 – Trading Sensitivity Analysis
(In thousands)

|  | Three Months Ended |  |
|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  | Mar. 31, 2023 |  |  |  |
|  | Up 50 bp |  | Down 50 bp |  | Up 50 bp |  | Down 50 bp |  | Up 50 bp |  | Down 50 bp |  |  |  |  |  |  |  |
Average 1 |  | $ | (3,745) |  |  | $ | 5,197 |  |  | $ | (1,068) |  |  | $ | 2,095 |  |  | $ | 701 |  |  | $ | (497) |  |  |  |  |  |  |  |  |
Low 2 |  | 1,684 |  |  | 8,685 |  |  | 3,604 |  |  | 6,216 |  |  | 4,513 |  |  | 1,983 |  |  |  |  |  |  |  |  |
High 3 |  | (6,898) |  |  | (59) |  |  | (5,897) |  |  | (2,457) |  |  | (1,837) |  |  | (4,538) |  |  |  |  |  |  |  |  |
Period End |  | (5,454) |  |  | 7,069 |  |  | (527) |  |  | 1,920 |  |  | 2,247 |  |  | (2,053) |  |  |  |  |  |  |  |  |

1 Average represents the simple average of each daily value observed during the reporting period.
2 Low represents least risk of loss in fair value measured as the smallest negative value or the largest positive value observed daily during the reporting period.
3 High represents the greatest risk of loss in fair value measured as the largest negative value or the smallest positive value observed daily during the reporting period.
Model Risk Management
BOK Financial has an internal independent Model Risk Management staff that validates models to verify they are conceptually sound, computationally accurate, are performing as expected, and are in line with their intended use. Model Risk Management staff also enforces the Company's model risk governance program that defines roles and responsibilities, including the authority to levy findings requiring remediation and to restrict model usage.
- 42 -

Model Validation
Model validation staff maintain independence from both the developers and users of the models. Models are validated through an evaluation process that assesses the data, theory, implementation, outcomes, and governance of each scenario. Each model receives a model risk score, which determines the frequency and scope of validation activities. Validations comprise an assessment of model performance as well as a model's potential limitations given its particular assumptions or weaknesses. Based on the results of the review, the team determines whether the use case for the model is appropriate. The ultimate validation results may require remediation actions from the business line. Model validation results are communicated with one of the following three outcomes: "Approved for use," "Approved with findings," or "Unapproved."
Controls and Procedures
As required by Rule 13a-15(b), BOK Financial's management, including the Chief Executive Officer and Chief Financial Officer, conducted an evaluation as of the end of the period covered by their reports, of the effectiveness of the Company's disclosure controls and procedures as defined in Exchange Act Rule 13a-15(e). Based on that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that the disclosure controls and procedures were effective as of the end of the period covered by this report. As required by Rule 13a-15(d), BOK Financial's management, including the Chief Executive Officer and Chief Financial Officer, also conducted an evaluation of the Company's internal controls over financial reporting to determine whether any changes occurred during the quarter covered by this report that have materially affected, or are reasonably likely to materially affect, the Company's internal controls over financial reporting. Based on that evaluation, there has been no such change during the quarter covered by this report.
Forward-Looking Statements
This report contains forward-looking statements that are based on management's beliefs, assumptions, current expectations, estimates and projections about BOK Financial Corporation, the financial services industry, and the economy generally and the related responses of the government, consumers, and others, on our business, financial condition and results of operations. Words such as "anticipates," "believes," "estimates," "expects," "forecasts," "plans," "outlook," "projects," "will," "intends," variations of such words and similar expressions are intended to identify such forward-looking statements. Management judgments relating to and discussion of the provision and allowance for credit losses, allowance for uncertain tax positions, accruals for loss contingencies and valuation of mortgage servicing rights involve judgments as to expected events and are inherently forward-looking statements. Assessments that acquisitions and growth endeavors will be profitable are necessary statements of belief as to the outcome of future events based in part on information provided by others which BOK Financial has not independently verified. These various forward-looking statements are not guarantees of future performance and involve certain risks, uncertainties, and assumptions which are difficult to predict with regard to timing, extent, likelihood and degree of occurrence. Therefore, actual results and outcomes may materially differ from what is expected, implied or forecasted in such forward-looking statements. Internal and external factors that might cause such a difference include, but are not limited to changes in government, consumer or business responses to changes in commodity prices, interest rates and interest rate relationships, inflation, demand for products and services, the degree of competition by traditional and nontraditional competitors, changes in banking regulations, tax laws, prices, levies and assessments, the impact of technological advances, and trends in customer behavior as well as their ability to repay loans. BOK Financial and its affiliates undertake no obligation to update, amend or clarify forward-looking statements, whether as a result of new information, future events, or otherwise.
Annualized, pro forma, projected and estimated numbers are used for illustrative purpose only, are not forecasts and may not reflect actual results.
In this report we may sometimes use non-GAAP financial measures. Please note that although non-GAAP financial measures provide useful insight to analysts, investors and regulators, they should not be considered in isolation or relied upon as a substitute for analysis using GAAP measures. If applicable, we provide GAAP reconciliations for non-GAAP financial measures.
- 43 -

Consolidated Statements of Earnings (Unaudited) |  |  |  |  |  |  |  |
(In thousands, except share and per share data) |  | Three Months Ended |  |
|  | March 31, |  |
Interest revenue |  | 2024 |  | 2023 |  |  |  |
Loans |  | $ | 438,677 |  |  | $ | 367,870 |  |  |  |  |
Residential mortgage loans held for sale |  | 923 |  |  | 979 |  |  |  |  |
Trading securities |  | 68,237 |  |  | 34,009 |  |  |  |  |
Investment securities |  | 7,829 |  |  | 8,928 |  |  |  |  |
Available for sale securities |  | 113,488 |  |  | 88,736 |  |  |  |  |
Fair value option securities |  | 195 |  |  | 3,893 |  |  |  |  |
Restricted equity securities |  | 8,858 |  |  | 5,808 |  |  |  |  |
Interest-bearing cash and cash equivalents |  | 7,005 |  |  | 6,506 |  |  |  |  |
Total interest revenue |  | 645,212 |  |  | 516,729 |  |  |  |  |
Interest expense |  |  |  |  |  |  |  |
Deposits |  | 242,124 |  |  | 95,274 |  |  |  |  |
Borrowed funds |  | 107,204 |  |  | 67,038 |  |  |  |  |
Subordinated debentures |  | 2,312 |  |  | 2,069 |  |  |  |  |
Total interest expense |  | 351,640 |  |  | 164,381 |  |  |  |  |
Net interest revenue |  | 293,572 |  |  | 352,348 |  |  |  |  |
Provision for credit losses |  | 8,000 |  |  | 16,000 |  |  |  |  |
Net interest revenue after provision for credit losses |  | 285,572 |  |  | 336,348 |  |  |  |  |
Other operating revenue |  |  |  |  |  |  |  |
Brokerage and trading revenue |  | 59,179 |  |  | 52,396 |  |  |  |  |
Transaction card revenue |  | 25,493 |  |  | 25,621 |  |  |  |  |
Fiduciary and asset management revenue |  | 55,305 |  |  | 50,657 |  |  |  |  |
Deposit service charges and fees |  | 28,685 |  |  | 25,968 |  |  |  |  |
Mortgage banking revenue |  | 18,967 |  |  | 14,367 |  |  |  |  |
Other revenue |  | 12,935 |  |  | 16,970 |  |  |  |  |
Total fees and commissions |  | 200,564 |  |  | 185,979 |  |  |  |  |
Other gains, net |  | 4,269 |  |  | 2,251 |  |  |  |  |
Loss on derivatives, net |  | (8,633) |  |  | (1,344) |  |  |  |  |
Loss on fair value option securities, net |  | (305) |  |  | (2,962) |  |  |  |  |
Change in fair value of mortgage servicing rights |  | 10,977 |  |  | (6,059) |  |  |  |  |
Loss on available for sale securities, net |  | (45,171) |  |  | — |  |  |  |  |
Total other operating revenue |  | 161,701 |  |  | 177,865 |  |  |  |  |
Other operating expense |  |  |  |  |  |  |  |
Personnel |  | 202,653 |  |  | 182,145 |  |  |  |  |
Business promotion |  | 7,978 |  |  | 8,569 |  |  |  |  |
Professional fees and services |  | 12,010 |  |  | 13,048 |  |  |  |  |
Net occupancy and equipment |  | 30,293 |  |  | 28,459 |  |  |  |  |
FDIC and other insurance |  | 8,740 |  |  | 7,315 |  |  |  |  |
FDIC special assessment |  | 6,454 |  |  | — |  |  |  |  |
Data processing and communications |  | 45,564 |  |  | 44,802 |  |  |  |  |
Printing, postage and supplies |  | 3,997 |  |  | 3,893 |  |  |  |  |
Amortization of intangible assets |  | 3,003 |  |  | 3,391 |  |  |  |  |
Mortgage banking costs |  | 6,355 |  |  | 5,782 |  |  |  |  |
Other expense |  | 13,337 |  |  | 8,408 |  |  |  |  |
Total other operating expense |  | 340,384 |  |  | 305,812 |  |  |  |  |
Net income before taxes |  | 106,889 |  |  | 208,401 |  |  |  |  |
Federal and state income taxes |  | 23,195 |  |  | 45,905 |  |  |  |  |
Net income |  | 83,694 |  |  | 162,496 |  |  |  |  |
Net income (loss) attributable to non-controlling interests |  | (9) |  |  | 128 |  |  |  |  |
Net income attributable to BOK Financial Corporation shareholders |  | $ | 83,703 |  |  | $ | 162,368 |  |  |  |  |
Earnings per share: |  |  |  |  |  |  |  |
Basic |  | $ | 1.29 |  |  | $ | 2.43 |  |  |  |  |
Diluted |  | $ | 1.29 |  |  | $ | 2.43 |  |  |  |  |
Average shares used in computation: |  |  |  |  |  |  |  |
Basic |  | 64,290,105 |  |  | 66,331,775 |  |  |  |  |
Diluted |  | 64,290,105 |  |  | 66,331,775 |  |  |  |  |
Dividends declared per share |  | $ | 0.55 |  |  | $ | 0.54 |  |  |  |  |

See accompanying notes to consolidated financial statements.
- 44 -

Consolidated Statements of Comprehensive Income (Unaudited) |  |  |  |
(In thousands) |  |  |  |  |  |  |  |
|  | Three Months Ended |  |
|  | March 31, |  |
|  | 2024 |  | 2023 |  |  |  |
Net income |  | $ | 83,694 |  |  | $ | 162,496 |  |  |  |  |
Other comprehensive income (loss) before income taxes: |  |  |  |  |  |  |  |
Net change in unrealized gain (loss) |  | (71,806) |  |  | 124,045 |  |  |  |  |
Reclassification adjustments included in earnings: |  |  |  |  |  |  |  |
Interest revenue, Investment securities |  | 12,183 |  |  | 16,051 |  |  |  |  |
Loss on available for sale securities, net |  | 45,171 |  |  | — |  |  |  |  |
Other comprehensive income (loss) before income taxes |  | (14,452) |  |  | 140,096 |  |  |  |  |
Federal and state income taxes |  | (3,424) |  |  | 31,695 |  |  |  |  |
Other comprehensive income (loss), net of income taxes |  | (11,028) |  |  | 108,401 |  |  |  |  |
Comprehensive income |  | 72,666 |  |  | 270,897 |  |  |  |  |
Comprehensive income (loss) attributable to non-controlling interests |  | (9) |  |  | 128 |  |  |  |  |
Comprehensive income attributable to BOK Financial Corporation shareholders |  | $ | 72,675 |  |  | $ | 270,769 |  |  |  |  |

See accompanying notes to consolidated financial statements.
- 45 -

Consolidated Balance Sheets
(In thousands, except share data)

|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  |
|  | (Unaudited) |  | (Footnote 1) |  |
Assets |  |  |  |  |  |
Cash and due from banks |  | $ | 801,677 |  |  | $ | 947,613 |  |  |
Interest-bearing cash and cash equivalents |  | 354,070 |  |  | 400,652 |  |  |
Trading securities |  | 5,441,038 |  |  | 5,193,505 |  |  |
Investment securities, net of allowance (fair value: March 31, 2024 – $2,000,065; December 31, 2023 – $2,072,586) |  | 2,185,744 |  |  | 2,244,153 |  |  |
Available for sale securities |  | 12,653,088 |  |  | 12,286,681 |  |  |
Fair value option securities |  | 19,805 |  |  | 20,671 |  |  |
Restricted equity securities |  | 382,549 |  |  | 423,099 |  |  |
Residential mortgage loans held for sale |  | 75,449 |  |  | 56,935 |  |  |
Loans |  | 24,172,560 |  |  | 23,904,968 |  |  |
Allowance for loan losses |  | (281,623) |  |  | (277,123) |  |  |
Loans, net of allowance |  | 23,890,937 |  |  | 23,627,845 |  |  |
Premises and equipment, net |  | 628,050 |  |  | 622,223 |  |  |
Receivables |  | 308,736 |  |  | 317,922 |  |  |
Goodwill |  | 1,044,749 |  |  | 1,044,749 |  |  |
Intangible assets, net |  | 56,894 |  |  | 59,979 |  |  |
Mortgage servicing rights |  | 319,330 |  |  | 293,884 |  |  |
Real estate and other repossessed assets, net of allowance (March 31, 2024 – $5,355; December 31, 2023 – $5,355) |  | 2,860 |  |  | 2,875 |  |  |
Derivative contracts, net |  | 263,493 |  |  | 410,304 |  |  |
Cash surrender value of bank-owned life insurance |  | 410,368 |  |  | 409,548 |  |  |
Receivable on unsettled securities sales |  | 67,854 |  |  | 391,910 |  |  |
Other assets |  | 1,253,689 |  |  | 1,070,282 |  |  |
Total assets |  | $ | 50,160,380 |  |  | $ | 49,824,830 |  |  |
Liabilities and Equity |  |  |  |  |  |
Liabilities: |  |  |  |  |  |
Non-interest bearing demand deposits |  | $ | 8,414,056 |  |  | $ | 9,196,493 |  |  |
Interest-bearing deposits: |  |  |  |  |  |
Transaction |  | 22,748,185 |  |  | 20,964,101 |  |  |
Savings |  | 854,397 |  |  | 847,085 |  |  |
Time |  | 3,366,909 |  |  | 3,012,022 |  |  |
Total deposits |  | 35,383,547 |  |  | 34,019,701 |  |  |
Funds purchased and repurchase agreements |  | 1,261,517 |  |  | 1,122,748 |  |  |
Other borrowings |  | 6,724,652 |  |  | 7,701,552 |  |  |
Subordinated debentures |  | 131,154 |  |  | 131,150 |  |  |
Accrued interest, taxes and expense |  | 318,622 |  |  | 338,996 |  |  |
Derivative contracts, net |  | 438,605 |  |  | 587,473 |  |  |
Due on unsettled securities purchases |  | 264,230 |  |  | 254,057 |  |  |
Other liabilities |  | 506,418 |  |  | 523,734 |  |  |
Total liabilities |  | 45,028,745 |  |  | 44,679,411 |  |  |
Shareholders' equity: |  |  |  |  |  |
Common stock (0.00006 par value; 2,500,000,000 shares authorized; shares issued and outstanding: March 31, 2024 – 76,793,000; December 31, 2023 – 76,593,292) |  | 5 |  |  | 5 |  |  |
Capital surplus |  | 1,411,293 |  |  | 1,406,745 |  |  |
Retained earnings |  | 5,259,646 |  |  | 5,211,512 |  |  |
Treasury stock (shares at cost: March 31, 2024 – 12,277,965; December 31, 2023 – 11,626,115) |  | (932,065) |  |  | (876,720) |  |  |
Accumulated other comprehensive income (loss) |  | (610,128) |  |  | (599,100) |  |  |
Total shareholders' equity |  | 5,128,751 |  |  | 5,142,442 |  |  |
Non-controlling interests |  | 2,884 |  |  | 2,977 |  |  |
Total equity |  | 5,131,635 |  |  | 5,145,419 |  |  |
Total liabilities and equity |  | $ | 50,160,380 |  |  | $ | 49,824,830 |  |  |

See accompanying notes to consolidated financial statements.
- 46 -

Consolidated Statements of Changes in Equity (Unaudited)
(In thousands)

|  | Common Stock |  | Capital Surplus |  | Retained Earnings |  | Treasury Stock |  | Accumulated Other Comprehensive Income (Loss) |  | Total Shareholders' Equity |  | Non- Controlling Interests |  | Total Equity
|  | Shares |  | Amount |  |  |  | Shares |  | Amount |  |  |
Balance, December 31, 2023 |  | 76,593 |  |  | $ | 5 |  |  | $ | 1,406,745 |  |  | $ | 5,211,512 |  |  | 11,626 |  |  | $ | (876,720) |  |  | $ | (599,100) |  |  | $ | 5,142,442 |  |  | $ | 2,977 |  |  | $ | 5,145,419 |
Net income (loss) |  | — |  |  | — |  |  | — |  |  | 83,703 |  |  | — |  |  | — |  |  | — |  |  | 83,703 |  |  | (9) |  |  | 83,694 |
Other comprehensive loss |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (11,028) |  |  | (11,028) |  |  | — |  |  | (11,028) |
Repurchase of common stock |  | — |  |  | — |  |  | — |  |  | — |  |  | 617 |  |  | (52,153) |  |  | — |  |  | (52,153) |  |  | — |  |  | (52,153) |
Share-based compensation plans: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested shares awarded, net |  | 200 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Vesting of non-vested shares |  | — |  |  | — |  |  | — |  |  | — |  |  | 35 |  |  | (3,192) |  |  | — |  |  | (3,192) |  |  | — |  |  | (3,192) |
Share-based compensation |  | — |  |  | — |  |  | 4,548 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 4,548 |  |  | — |  |  | 4,548 |
Cash dividends on common stock |  | — |  |  | — |  |  | — |  |  | (35,569) |  |  | — |  |  | — |  |  | — |  |  | (35,569) |  |  | — |  |  | (35,569) |
Capital calls and distributions, net |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (84) |  |  | (84) |
Balance, March 31, 2024 |  | 76,793 |  |  | $ | 5 |  |  | $ | 1,411,293 |  |  | $ | 5,259,646 |  |  | 12,278 |  |  | $ | (932,065) |  |  | $ | (610,128) |  |  | $ | 5,128,751 |  |  | $ | 2,884 |  |  | $ | 5,131,635 |
Balance, December 31, 2022 |  | 76,423 |  |  | $ | 5 |  |  | $ | 1,390,395 |  |  | $ | 4,824,164 |  |  | 9,465 |  |  | $ | (694,960) |  |  | $ | (836,955) |  |  | $ | 4,682,649 |  |  | $ | 4,709 |  |  | $ | 4,687,358 |
Net income (loss) |  | — |  |  | — |  |  | — |  |  | 162,368 |  |  | — |  |  | — |  |  | — |  |  | 162,368 |  |  | 128 |  |  | 162,496 |
Other comprehensive income |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 108,401 |  |  | 108,401 |  |  | — |  |  | 108,401 |
Repurchase of common stock |  | — |  |  | — |  |  | — |  |  | — |  |  | 447 |  |  | (44,476) |  |  | — |  |  | (44,476) |  |  | — |  |  | (44,476) |
Share-based compensation plans: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-vested shares awarded, net |  | 133 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Vesting of non-vested shares |  | — |  |  | — |  |  | — |  |  | — |  |  | 43 |  |  | (4,501) |  |  | — |  |  | (4,501) |  |  | — |  |  | (4,501) |
Share-based compensation |  | — |  |  | — |  |  | 6,701 |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 6,701 |  |  | — |  |  | 6,701 |
Cash dividends on common stock |  | — |  |  | — |  |  | — |  |  | (36,356) |  |  | — |  |  | — |  |  | — |  |  | (36,356) |  |  | — |  |  | (36,356) |
Capital calls and distributions, net |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | (1,596) |  |  | (1,596) |
Balance, March 31, 2023 |  | 76,556 |  |  | $ | 5 |  |  | $ | 1,397,096 |  |  | $ | 4,950,176 |  |  | 9,955 |  |  | $ | (743,937) |  |  | $ | (728,554) |  |  | $ | 4,874,786 |  |  | $ | 3,241 |  |  | $ | 4,878,027 |

See accompanying notes to consolidated financial statements.
- 47 -

Consolidated Statements of Cash Flows (Unaudited)
(In thousands)

|  | Three Months Ended
|  | March 31,
|  | 2024 |  | 2023
Cash Flows From Operating Activities: |  |  |  |
Net income |  | $ | 83,694 |  |  | $ | 162,496 |
Adjustments to reconcile net income to net cash provided by (used in) operating activities: |  |  |  |
Provision for credit losses |  | 8,000 |  |  | 16,000 |
Change in fair value of mortgage servicing rights due to market assumption changes |  | (10,977) |  |  | 6,059 |
Change in the fair value of mortgage servicing rights due to principal payments |  | 5,447 |  |  | 5,382 |
Net unrealized (gains) losses from derivative contracts |  | (67,516) |  |  | 61,704 |
Share-based compensation |  | 4,548 |  |  | 6,701 |
Depreciation and amortization |  | 26,392 |  |  | 26,885 |
Net amortization of discounts and premiums |  | (8,923) |  |  | (4,163) |
Net losses (gains) on financial instruments and other losses (gains), net |  | 40,792 |  |  | (2,009) |
Net loss (gain) on mortgage loans held for sale |  | (1,644) |  |  | 1,361 |
Mortgage loans originated for sale |  | (139,176) |  |  | (138,624) |
Proceeds from sale of mortgage loans held for sale |  | 124,187 |  |  | 139,088 |
Capitalized mortgage servicing rights |  | (2,516) |  |  | (2,498) |
Change in trading and fair value option securities |  | (246,669) |  |  | 2,140,101 |
Change in receivables |  | 284,991 |  |  | 11,032 |
Change in other assets |  | 23,196 |  |  | 6,721 |
Change in other liabilities |  | 55,394 |  |  | 28,544 |
Net cash provided by (used in) operating activities |  | 179,220 |  |  | 2,464,780 |
Cash Flows From Investing Activities: |  |  |  |
Proceeds from maturities or redemptions of investment securities |  | 57,642 |  |  | 64,514 |
Proceeds from maturities or redemptions of available for sale securities |  | 417,103 |  |  | 313,935 |
Purchases of available for sale securities |  | (1,582,902) |  |  | (631,168) |
Proceeds from sales of available for sale securities |  | 735,994 |  |  | — |
Change in amount receivable on unsettled available for sale securities transactions |  | 48,195 |  |  | 9,864 |
Loans originated, net of principal collected |  | (271,674) |  |  | (187,088) |
Net proceeds from (payments on) derivative asset contracts |  | (5,533) |  |  | 156,522 |
Net change in restricted equity securities |  | 40,550 |  |  | 11,470 |
Proceeds from disposition of assets |  | 4,624 |  |  | 7,401 |
Purchases of assets |  | (40,911) |  |  | (58,710) |
Net cash provided by (used in) investing activities |  | (596,912) |  |  | (313,260) |
Cash Flows From Financing Activities: |  |  |  |
Net change in demand deposits, transaction deposits and savings accounts |  | 1,008,959 |  |  | (2,014,726) |
Net change in time deposits |  | 354,887 |  |  | 114,768 |
Net change in other borrowed funds |  | (839,632) |  |  | (677,232) |
Net payments on derivative liability contracts |  | (1,613) |  |  | (158,021) |
Net change in derivative margin accounts |  | (116,706) |  |  | 579,188 |
Change in amount due on unsettled available for sale securities transactions |  | (89,807) |  |  | 52,104 |
Issuance of common and treasury stock, net |  | (3,192) |  |  | (4,501) |
Repurchase of common stock |  | (52,153) |  |  | (44,476) |
Dividends paid |  | (35,569) |  |  | (36,356) |
Net cash provided by (used in) financing activities |  | 225,174 |  |  | (2,189,252) |
Net increase (decrease) in cash and cash equivalents |  | (192,518) |  |  | (37,732) |
Cash and cash equivalents at beginning of period |  | 1,348,265 |  |  | 1,401,716 |
Cash and cash equivalents at end of period |  | $ | 1,155,747 |  |  | $ | 1,363,984 |
Supplemental Cash Flow Information: |  |  |  |
Cash paid for interest |  | $ | 348,394 |  |  | $ | 163,960 |
Cash paid for taxes |  | $ | 1,270 |  |  | $ | 733 |
Net loans and bank premises transferred to repossessed real estate and other assets |  | $ | 77 |  |  | $ | 225 |
Residential mortgage loans guaranteed by U.S. government agencies that became eligible for repurchase during the period |  | $ | 1,501 |  |  | $ | 5,556 |
Conveyance of other real estate owned guaranteed by U.S. government agencies |  | $ | 1,371 |  |  | $ | 1,150 |
Right-of-use assets obtained in exchange for operating lease liabilities |  | $ | 10,562 |  |  | $ | 63,521 |

See accompanying notes to consolidated financial statements.
- 48 -

Notes to Consolidated Financial Statements (Unaudited)
(1) Significant Accounting Policies
Basis of Presentation
The accompanying unaudited consolidated financial statements of BOK Financial have been prepared in accordance with accounting principles for interim financial information generally accepted in the United States and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included.
The unaudited consolidated financial statements include accounts of BOK Financial and its subsidiaries, principally BOKF, NA, BOK Financial Securities, Inc., and BOK Financial Private Wealth, Inc. Operating divisions of the Bank include Bank of Albuquerque, Bank of Oklahoma, Bank of Texas, BOK Financial in Arizona, Arkansas, Colorado and Kansas/Missouri, BOK Financial Mortgage and the TransFund electronic funds network.
Certain reclassifications have been made to conform to the current period presentation.
The financial information should be read in conjunction with BOK Financial's 2023 Form 10-K filed with the Securities and Exchange Commission, which contains audited financial statements. Amounts presented as of December 31, 2023 have been derived from the audited financial statements included in BOK Financial's 2023 Form 10-K but do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. Operating results for the three-month period ended March 31, 2024 are not necessarily indicative of the results that may be expected for the year ending December 31, 2024.
Newly Adopted and Pending Accounting Policies
Financial Accounting Standards Board
FASB ASU 2023-01, Leases (Topic 842): Common Control Arrangements
On March 27, 2023, the FASB issued ASU 2023-01 which, in part, amends the accounting for leasehold improvement in common-control arrangements. Under previous guidance, a lessee is generally required to amortize leasehold improvements that it owns over the shorter of the useful life of those improvements or the lease term. However, due to the nature of leasehold improvements made under leases between entities under common control, ASU 2023-01 requires a lessee in a common-control arrangement to amortize such leasehold improvements that it owns over the improvements' useful life to the common control group, regardless of the lease term. ASU 2023-01 is effective for fiscal years beginning after December 15, 2023, including interim periods within those fiscal years. Adoption of ASU 2023-01 did not have a material impact on the Company's financial statements.
FASB ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures
The FASB issued ASU 2023-07 on November 27, 2023 which is intended to improve reportable segment disclosure requirements. Under previous guidance, while entities were required to disclose segment revenue and measure of profit or loss, there has been limited disclosure around the reporting of segment expenses. In addition to enhanced disclosures about significant segment expenses, the amendments enhance interim disclosure requirements, clarify circumstances in which an entity can disclose multiple segment measures of profit or loss, provide new segment disclosure requirements for entities with a single reportable segment, and contain other disclosure requirements. The purpose of the amendments is to enable investors to better understand an entity’s overall performance and assess potential future cash flows. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024. The Company is evaluating the requirements of the expanded segment disclosures but does not expect the additional disclosures to have a material impact on the reported segment information.
- 49 -

FASB ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures
The FASB issued ASU 2023-09 on December 14, 2023 which amends income tax disclosures to provide information to better assess how an entity’s operations and related tax risks and tax planning and operational opportunities affect its tax rate and prospects for future cash flows. The new guidance requires the entity to disclose specific categories in the rate reconciliation and provide additional information for reconciling items that meet a quantitative threshold. ASU 2023-09 is effective for annual periods beginning after December 15, 2024. The Company is currently assessing the impact ASU 2023-09 will have on its income tax disclosures.
FASB ASU 2024-01, Compensation—Stock Compensation (Topic 718): Scope Application of Profits Interest and Similar Awards
The FASB issued ASU 2024-01 on March 21, 2024 which provides illustrative guidance to help entities determine whether profits interest and similar awards should be accounted for as share-based payment arrangements within the scope of Topic 718, Compensation—Stock Compensation. The ASU is effective for annual periods beginning after December 15, 2024, including interim periods within those periods. Adoption of ASU 2024-01 is not expected to have a material impact on the Company's financial statements.
- 50 -

(2) Securities
Trading Securities
The fair value and net unrealized gain (loss) included in trading securities are as follows (in thousands):

|  | March 31, 2024 |  | December 31, 2023
|  | Fair Value |  | Net Unrealized Gain (Loss) |  | Fair Value |  | Net Unrealized Gain (Loss)
U.S. government securities |  | $ | 426,825 |  |  | $ | (194) |  |  | $ | 10,959 |  |  | $ | 28 |
Residential agency mortgage-backed securities |  | 4,898,485 |  |  | 8,571 |  |  | 5,105,137 |  |  | 98,124 |
Municipal securities |  | 67,120 |  |  | (142) |  |  | 37,413 |  |  | 323 |
Other trading securities |  | 48,608 |  |  | 127 |  |  | 39,996 |  |  | 160 |
Total trading securities |  | $ | 5,441,038 |  |  | $ | 8,362 |  |  | $ | 5,193,505 |  |  | $ | 98,635 |

Investment Securities
The amortized cost and fair values of investment securities are as follows (in thousands):

|  | March 31, 2024
|  | Amortized |  | Carrying |  | Fair |  | Gross Unrealized
|  | Cost |  | Value 1 |  | Value |  | Gain |  | Loss
Municipal securities |  | $ | 108,793 |  |  | $ | 108,793 |  |  | $ | 112,338 |  |  | $ | 3,828 |  |  | $ | (283) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |
Residential agency |  | 2,196,121 |  |  | 2,044,972 |  |  | 1,858,027 |  |  | 99 |  |  | (187,044) |
Commercial agency |  | 17,258 |  |  | 15,990 |  |  | 14,987 |  |  | — |  |  | (1,003) |
Other debt securities |  | 16,288 |  |  | 16,288 |  |  | 14,713 |  |  | — |  |  | (1,575) |
Total investment securities |  | 2,338,460 |  |  | 2,186,043 |  |  | 2,000,065 |  |  | 3,927 |  |  | (189,905) |
Allowance for credit losses |  | (299) |  |  | (299) |  |  | — |  |  | — |  |  | — |
Investment securities, net of allowance |  | $ | 2,338,161 |  |  | $ | 2,185,744 |  |  | $ | 2,000,065 |  |  | $ | 3,927 |  |  | $ | (189,905) |

1 Carrying value includes $152 million of net unrealized loss which remains in AOCI in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.

|  | December 31, 2023
|  | Amortized |  | Carrying |  | Fair |  | Gross Unrealized
|  | Cost |  | Value 1 |  | Value |  | Gain |  | Loss
Municipal securities |  | $ | 120,705 |  |  | $ | 120,705 |  |  | $ | 125,525 |  |  | $ | 5,014 |  |  | $ | (194) |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |
Residential agency |  | 2,255,340 |  |  | 2,092,083 |  |  | 1,917,810 |  |  | 125 |  |  | (174,398) |
Commercial agency |  | 17,258 |  |  | 15,914 |  |  | 15,067 |  |  | — |  |  | (847) |
Other debt securities |  | 15,787 |  |  | 15,787 |  |  | 14,184 |  |  | — |  |  | (1,603) |
Total investment securities |  | 2,409,090 |  |  | 2,244,489 |  |  | 2,072,586 |  |  | 5,139 |  |  | (177,042) |
Allowance for credit losses |  | (336) |  |  | (336) |  |  | — |  |  | — |  |  | — |
Investment securities, net of allowance |  | $ | 2,408,754 |  |  | $ | 2,244,153 |  |  | $ | 2,072,586 |  |  | $ | 5,139 |  |  | $ | (177,042) |

1 Carrying value includes $165 million of net unrealized loss which remains in AOCI in the Consolidated Balance Sheets related to certain securities transferred during the second quarter of 2022 from the Available for Sale securities portfolio to the Investment securities portfolio.
- 51 -

The amortized cost and fair values of investment securities at March 31, 2024, by contractual maturity, are as shown in the following table (dollars in thousands):

|  | Less than One Year |  | One to Five Years |  | Six to Ten Years |  | Over Ten Years |  | Total |  | Weighted Average Maturity 1
Fixed maturity debt securities: |  |  |  |  |  |  |  |  |  |  |  |
Carrying value |  | $ | 19,248 |  |  | $ | 95,707 |  |  | $ | 26,103 |  |  | $ | 13 |  |  | $ | 141,071 |  |  | 3.27 |
Fair value |  | 19,468 |  |  | 98,033 |  |  | 24,524 |  |  | 13 |  |  | 142,038 |  |  |
Residential mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |
Carrying value |  |  |  |  |  |  |  |  |  | $ | 2,044,972 |  |  | 2
Fair value |  |  |  |  |  |  |  |  |  | 1,858,027 |  |  |
Total investment securities: |  |  |  |  |  |  |  |  |  |  |  |
Carrying value |  |  |  |  |  |  |  |  |  | $ | 2,186,043 |  |  |
Fair value |  |  |  |  |  |  |  |  |  | 2,000,065 |  |  |

1 Expected maturities may differ from contractual maturities, because borrowers may have the right to call or prepay obligations with or without penalty.
2 The average expected lives of residential mortgage-backed securities were 4.9 years based upon current prepayment assumptions.
Temporarily Impaired Investment Securities
(dollars in thousands):

|  | March 31, 2024
|  | Number of Securities |  | Less Than 12 Months |  | 12 Months or Longer |  | Total
|  |  | Fair Value |  | Unrealized Loss |  | Fair Value |  | Unrealized Loss |  | Fair Value |  | Unrealized Loss
Investment: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipal securities |  | 20 |  |  | $ | 17,310 |  |  | $ | 81 |  |  | $ | 6,587 |  |  | $ | 202 |  |  | $ | 23,897 |  |  | $ | 283 |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential agency |  | 116 |  |  | — |  |  | — |  |  | 1,857,000 |  |  | 187,044 |  |  | 1,857,000 |  |  | 187,044 |
Commercial agency |  | 2 |  |  | — |  |  | — |  |  | 14,987 |  |  | 1,003 |  |  | 14,987 |  |  | 1,003 |
Other debt securities |  | 3 |  |  | — |  |  | — |  |  | 8,700 |  |  | 1,575 |  |  | 8,700 |  |  | 1,575 |
Total investment securities |  | 141 |  |  | $ | 17,310 |  |  | $ | 81 |  |  | $ | 1,887,274 |  |  | $ | 189,824 |  |  | $ | 1,904,584 |  |  | $ | 189,905 |

|  | December 31, 2023
|  | Number of Securities |  | Less Than 12 Months |  | 12 Months or Longer |  | Total
|  |  | Fair Value |  | Unrealized Loss |  | Fair Value |  | Unrealized Loss |  | Fair Value |  | Unrealized Loss
Investment: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Municipal securities |  | 13 |  |  | $ | 1,931 |  |  | $ | 5 |  |  | $ | 6,600 |  |  | $ | 189 |  |  | $ | 8,531 |  |  | $ | 194 |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential agency |  | 116 |  |  | — |  |  | — |  |  | 1,916,732 |  |  | 174,398 |  |  | 1,916,732 |  |  | 174,398 |
Commercial agency |  | 2 |  |  | — |  |  | — |  |  | 15,067 |  |  | 847 |  |  | 15,067 |  |  | 847 |
Other debt securities |  | 3 |  |  | — |  |  | — |  |  | 8,672 |  |  | 1,603 |  |  | 8,672 |  |  | 1,603 |
Total investment securities |  | 134 |  |  | $ | 1,931 |  |  | $ | 5 |  |  | $ | 1,947,071 |  |  | $ | 177,037 |  |  | $ | 1,949,002 |  |  | $ | 177,042 |

- 52 -

Available for Sale Securities
The amortized cost and fair value of available for sale securities are as follows (in thousands):

|  | March 31, 2024 |  |
|  | Amortized |  | Fair |  | Gross Unrealized |  |
|  | Cost |  | Value |  | Gain |  | Loss |  |
U.S. Treasury |  | $ | 1,000 |  |  | $ | 920 |  |  | $ | — |  |  | $ | (80) |  |  |
Municipal securities |  | 329,216 |  |  | 304,826 |  |  | — |  |  | (24,390) |  |  |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |
Residential agency |  | 8,095,352 |  |  | 7,816,688 |  |  | 20,132 |  |  | (298,796) |  |  |
Residential non-agency |  | 885,059 |  |  | 846,805 |  |  | 11,106 |  |  | (49,360) |  |  |
Commercial agency |  | 3,985,220 |  |  | 3,683,376 |  |  | 1,197 |  |  | (303,041) |  |  |
Other debt securities |  | 500 |  |  | 473 |  |  | — |  |  | (27) |  |  |
Total available for sale securities |  | $ | 13,296,347 |  |  | $ | 12,653,088 |  |  | $ | 32,435 |  |  | $ | (675,694) |  |  |

|  | December 31, 2023 |  |
|  | Amortized |  | Fair |  | Gross Unrealized |  |
|  | Cost |  | Value |  | Gain |  | Loss |  |
U.S. Treasury |  | $ | 1,000 |  |  | $ | 925 |  |  | $ | — |  |  | $ | (75) |  |  |
Municipal securities |  | 544,707 |  |  | 502,833 |  |  | 1 |  |  | (41,875) |  |  |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |
Residential agency |  | 7,066,645 |  |  | 6,834,720 |  |  | 36,983 |  |  | (268,908) |  |  |
Residential non-agency |  | 833,535 |  |  | 799,877 |  |  | 12,865 |  |  | (46,523) |  |  |
Commercial agency |  | 4,456,918 |  |  | 4,147,853 |  |  | 2,972 |  |  | (312,037) |  |  |
Other debt securities |  | 500 |  |  | 473 |  |  | — |  |  | (27) |  |  |
Total available for sale securities |  | $ | 12,903,305 |  |  | $ | 12,286,681 |  |  | $ | 52,821 |  |  | $ | (669,445) |  |  |

The amortized cost and fair values of available for sale securities at March 31, 2024, by contractual maturity, are as shown in the following table (dollars in thousands):

| Less than One Year |  | One to Five Years |  | Six to Ten Years |  | Over Ten Years |  | Total |  | Weighted Average Maturity 1
Fixed maturity debt securities: |  |  |  |  |  |  |  |  |  |  |
Amortized cost | $ | 473,589 |  |  | $ | 2,480,160 |  |  | $ | 915,033 |  |  | $ | 447,154 |  |  | $ | 4,315,936 |  |  | 5.19 |
Fair value | 468,688 |  |  | 2,254,408 |  |  | 841,253 |  |  | 425,246 |  |  | 3,989,595 |  |  |
Residential mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |
Amortized cost |  |  |  |  |  |  |  |  | $ | 8,980,411 |  |  | 2
Fair value |  |  |  |  |  |  |  |  | 8,663,493 |  |  |
Total available for sale securities: |  |  |  |  |  |  |  |  |  |  |
Amortized cost |  |  |  |  |  |  |  |  | $ | 13,296,347 |  |  |
Fair value |  |  |  |  |  |  |  |  | 12,653,088 |  |  |

1 Expected maturities may differ from contractual maturities because borrowers may have the right to call or prepay obligations with or without penalty.
2 The average expected lives of residential mortgage-backed securities were 4.2 years based upon current prepayment assumptions.
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Sales of available for sale securities resulted in gains and losses as follows (in thousands):

| Three Months Ended March 31, |  |
| 2024 |  | 2023 |  |  |  |
Proceeds | $ | 735,994 |  |  | $ | — |  |  |  |  |
Gross realized gains | 233 |  |  | — |  |  |  |  |
Gross realized losses | (45,404) |  |  | — |  |  |  |  |
Related federal and state income tax benefit | (10,624) |  |  | — |  |  |  |  |

The fair value of debt securities pledged as collateral for repurchase agreements, public trust funds on deposit and for other purposes, as required by law was $18.9 billion at March 31, 2024 and $13.9 billion at December 31, 2023. The secured parties do not have the right to sell or repledge these securities.
Temporarily Impaired Available for Sale Securities
(Dollars in thousands)

|  | March 31, 2024
|  | Number of Securities |  | Less Than 12 Months |  | 12 Months or Longer |  | Total
|  |  | Fair Value |  | Unrealized Loss |  | Fair Value |  | Unrealized Loss |  | Fair Value |  | Unrealized Loss
Available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury |  | 1 |  |  | $ | — |  |  | $ | — |  |  | $ | 920 |  |  | $ | 80 |  |  | $ | 920 |  |  | $ | 80 |
Municipal securities |  | 135 |  |  | 3,139 |  |  | 30 |  |  | 298,162 |  |  | 24,360 |  |  | 301,301 |  |  | 24,390 |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential agency |  | 711 |  |  | 2,179,355 |  |  | 10,501 |  |  | 3,502,950 |  |  | 288,296 |  |  | 5,682,306 |  |  | 298,797 |
Residential non-agency |  | 38 |  |  | 138,197 |  |  | 530 |  |  | 532,619 |  |  | 48,829 |  |  | 670,815 |  |  | 49,359 |
Commercial agency |  | 245 |  |  | 241,331 |  |  | 2,625 |  |  | 3,148,535 |  |  | 300,416 |  |  | 3,389,866 |  |  | 303,041 |
Other debt securities |  | 1 |  |  | — |  |  | — |  |  | 473 |  |  | 27 |  |  | 473 |  |  | 27 |
Total available for sale securities |  | 1,131 |  |  | $ | 2,562,022 |  |  | $ | 13,686 |  |  | $ | 7,483,659 |  |  | $ | 662,008 |  |  | $ | 10,045,681 |  |  | $ | 675,694 |

|  | December 31, 2023
|  | Number of Securities |  | Less Than 12 Months |  | 12 Months or Longer |  | Total
|  |  | Fair Value |  | Unrealized Loss |  | Fair Value |  | Unrealized Loss |  | Fair Value |  | Unrealized Loss
Available for sale: |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury |  | 1 |  |  | $ | — |  |  | $ | — |  |  | $ | 925 |  |  | $ | 75 |  |  | $ | 925 |  |  | $ | 75 |
Municipal securities |  | 190 |  |  | 6,799 |  |  | 410 |  |  | 494,955 |  |  | 41,465 |  |  | 501,754 |  |  | 41,875 |
Mortgage-backed securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Residential agency |  | 630 |  |  | 690,118 |  |  | 3,689 |  |  | 3,717,975 |  |  | 265,219 |  |  | 4,408,093 |  |  | 268,908 |
Residential non-agency |  | 32 |  |  | 116,077 |  |  | 1,244 |  |  | 451,370 |  |  | 45,279 |  |  | 567,447 |  |  | 46,523 |
Commercial agency |  | 269 |  |  | 392,828 |  |  | 2,626 |  |  | 3,421,757 |  |  | 309,411 |  |  | 3,814,585 |  |  | 312,037 |
Other debt securities |  | 1 |  |  | — |  |  | — |  |  | 473 |  |  | 27 |  |  | 473 |  |  | 27 |
Total available for sale securities |  | 1,123 |  |  | $ | 1,205,822 |  |  | $ | 7,969 |  |  | $ | 8,087,455 |  |  | $ | 661,476 |  |  | $ | 9,293,277 |  |  | $ | 669,445 |

Based on evaluations of impaired securities as of March 31, 2024, the Company does not intend to sell any impaired available for sale debt securities before fair value recovers to the current amortized cost, and it is more-likely-than-not that the Company will not be required to sell impaired securities before fair value recovers, which may be maturity.
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Fair Value Option Securities
Fair value option securities represent securities which the Company has elected to carry at fair value and are separately identified on the Consolidated Balance Sheets. Changes in the fair value are recognized in earnings as they occur. Certain securities are held as an economic hedge of the mortgage servicing rights.
The fair value and net unrealized gain (loss) included in fair value option securities is as follows (in thousands):

|  | March 31, 2024 |  | December 31, 2023
|  | Fair Value |  | Net Unrealized Gain (Loss) |  | Fair Value |  | Net Unrealized Gain (Loss)
Residential agency mortgage-backed securities |  | $ | 19,805 |  |  | $ | (1,711) |  |  | $ | 20,671 |  |  | $ | (1,406) |

(3) Derivatives
Derivative instruments may be used by the Company as part of its internal risk management programs or may be offered to customers. All derivative instruments are carried at fair value, and changes in fair value are reported in earnings as they occur. Credit risk is also considered in determining fair value. Deterioration in the credit rating of customer or other counterparties reduce the fair value of asset contracts. Deterioration of our credit rating could decrease the fair value of our derivative liabilities.
When bilateral netting agreements or similar arrangements exist between the Company and its counterparties that create a single legal claim or obligation to pay or receive the net amount in settlement of the individual derivative contracts, the Company reports derivative assets and liabilities on a net by derivative contract type by counterparty basis.
Derivative contracts may require the Company to provide or receive cash margin as collateral for derivative assets and liabilities. Derivative assets and liabilities are reported net of cash margin when certain conditions are met. In addition, derivative contracts executed with customers under Customer Risk Management Programs may be secured by non-cash collateral in conjunction with a credit agreement with that customer. Access to collateral in the event of default is reasonably assured.
None of these derivative contracts have been designated as hedging instruments for accounting purposes.
Customer Risk Management Programs
BOK Financial offers programs to permit its customers to manage various risks, including fluctuations in energy, cattle and other agricultural products, interest rates and foreign exchange rates with derivative contracts. Customers may also manage interest rate risk through interest rate swaps used by borrowers to modify interest rate terms of their loans. Derivative contracts are executed between the customers and BOK Financial. Offsetting contracts are executed between BOK Financial and other selected counterparties to minimize the risk of changes in commodity prices, interest rates or foreign exchange rates. The counterparty contracts are identical to customer contracts, except for a fixed pricing spread or fee paid to BOK Financial as profit and compensation for administrative costs and credit risk which is recognized over the life of the contracts and included in Other operating revenue – Brokerage and trading revenue in the Consolidated Statements of Earnings.
Trading
BOK Financial may offer derivative instruments such as to-be-announced securities to mortgage banking customers to enable them to manage their market risk or to mitigate the Company's market risk of holding trading securities. Changes in the fair value of derivative instruments for trading purposes or used to mitigate the market risk of holding trading securities are included in Other operating revenue – Brokerage and trading revenue in the Consolidated Statements of Earnings.
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Internal Risk Management Programs
BOK Financial may use derivative contracts in managing its interest rate sensitivity, as part of its economic hedge of the change in the fair value of mortgage servicing rights. Changes in the fair value of derivative instruments used in managing interest rate sensitivity and as part of the economic hedge of changes in the fair value of mortgage servicing rights are included in Other operating revenue – Gain (loss) on derivatives, net in the Consolidated Statements of Earnings.
As discussed in Note 5, certain derivative contracts not designated as hedging instruments related to mortgage loan commitments and forward sales contracts are included in Residential mortgage loans held for sale on the Consolidated Balance Sheets. See Note 5 for additional discussion of notional, fair value and impact on earnings of these contracts.
The following table summarizes the fair values of derivative contracts recorded as "derivative contracts" assets and liabilities in the balance sheet at March 31, 2024 (in thousands):

|  | Assets
|  | Notional 1 |  | Gross Fair Value |  | Netting Adjustments |  | Net Fair Value Before Cash Collateral |  | Cash Collateral |  | Fair Value Net of Cash Collateral
Customer risk management programs: |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts |  | $ | 3,075,103 |  |  | $ | 118,237 |  |  | $ | (3,844) |  |  | $ | 114,393 |  |  | $ | (111,283) |  |  | $ | 3,110 |
Energy contracts |  | 7,266,492 |  |  | 754,565 |  |  | (461,295) |  |  | 293,270 |  |  | (117,521) |  |  | 175,749 |
Foreign exchange contracts |  | 56,590 |  |  | 55,687 |  |  | — |  |  | 55,687 |  |  | (842) |  |  | 54,845 |
Equity option contracts |  | 1,859 |  |  | 61 |  |  | — |  |  | 61 |  |  | (50) |  |  | 11 |
Total customer risk management programs |  | 10,400,044 |  |  | 928,550 |  |  | (465,139) |  |  | 463,411 |  |  | (229,696) |  |  | 233,715 |
Trading |  | 19,616,813 |  |  | 67,692 |  |  | (40,165) |  |  | 27,527 |  |  | (44) |  |  | 27,483 |
Internal risk management programs |  | 455,912 |  |  | 3,608 |  |  | (1,313) |  |  | 2,295 |  |  | — |  |  | 2,295 |
Total derivative contracts |  | $ | 30,472,769 |  |  | $ | 999,850 |  |  | $ | (506,617) |  |  | $ | 493,233 |  |  | $ | (229,740) |  |  | $ | 263,493 |
|  | Liabilities
|  | Notional 1 |  | Gross Fair Value |  | Netting Adjustments |  | Net Fair Value Before Cash Collateral |  | Cash Collateral |  | Fair Value Net of Cash Collateral
Customer risk management programs: |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts |  | $ | 3,065,103 |  |  | $ | 116,796 |  |  | $ | (3,844) |  |  | $ | 112,952 |  |  | $ | — |  |  | $ | 112,952 |
Energy contracts |  | 7,720,466 |  |  | 753,145 |  |  | (461,295) |  |  | 291,850 |  |  | (29,444) |  |  | 262,406 |
Foreign exchange contracts |  | 56,254 |  |  | 55,161 |  |  | — |  |  | 55,161 |  |  | — |  |  | 55,161 |
Equity option contracts |  | 1,859 |  |  | 61 |  |  | — |  |  | 61 |  |  | — |  |  | 61 |
Total customer risk management programs |  | 10,843,682 |  |  | 925,163 |  |  | (465,139) |  |  | 460,024 |  |  | (29,444) |  |  | 430,580 |
Trading |  | 23,751,156 |  |  | 93,502 |  |  | (40,165) |  |  | 53,337 |  |  | (46,563) |  |  | 6,774 |
Internal risk management programs |  | 38,617 |  |  | 2,564 |  |  | (1,313) |  |  | 1,251 |  |  | — |  |  | 1,251 |
Total derivative contracts |  | $ | 34,633,455 |  |  | $ | 1,021,229 |  |  | $ | (506,617) |  |  | $ | 514,612 |  |  | $ | (76,007) |  |  | $ | 438,605 |

1 Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.
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The following table summarizes the fair values of derivative contracts recorded as "derivative contracts" assets and liabilities in the balance sheet at December 31, 2023 (in thousands):

|  | Assets
|  | Notional 1 |  | Gross Fair Value |  | Netting Adjustments |  | Net Fair Value Before Cash Collateral |  | Cash Collateral |  | Fair Value Net of Cash Collateral
Customer risk management programs: |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts |  | $ | 2,754,476 |  |  | $ | 108,450 |  |  | $ | (6,810) |  |  | $ | 101,640 |  |  | $ | (94,608) |  |  | $ | 7,032 |
Energy contracts |  | 7,846,190 |  |  | 836,425 |  |  | (399,148) |  |  | 437,277 |  |  | (169,141) |  |  | 268,136 |
Foreign exchange contracts |  | 54,999 |  |  | 53,863 |  |  | — |  |  | 53,863 |  |  | (872) |  |  | 52,991 |
Equity option contracts |  | 3,316 |  |  | 54 |  |  | — |  |  | 54 |  |  | (44) |  |  | 10 |
Total customer risk management programs |  | 10,658,981 |  |  | 998,792 |  |  | (405,958) |  |  | 592,834 |  |  | (264,665) |  |  | 328,169 |
Trading |  | 16,264,818 |  |  | 118,545 |  |  | (37,111) |  |  | 81,434 |  |  | (6,996) |  |  | 74,438 |
Internal risk management programs |  | 425,014 |  |  | 7,697 |  |  | — |  |  | 7,697 |  |  | — |  |  | 7,697 |
Total derivative contracts |  | $ | 27,348,813 |  |  | $ | 1,125,034 |  |  | $ | (443,069) |  |  | $ | 681,965 |  |  | $ | (271,661) |  |  | $ | 410,304 |
|  | Liabilities
|  | Notional 1 |  | Gross Fair Value |  | Netting Adjustments |  | Net Fair Value Before Cash Collateral |  | Cash Collateral |  | Fair Value Net of Cash Collateral
Customer risk management programs: |  |  |  |  |  |  |  |  |  |  |  |
Interest rate contracts |  | $ | 2,754,476 |  |  | $ | 108,402 |  |  | $ | (6,810) |  |  | $ | 101,592 |  |  | $ | — |  |  | $ | 101,592 |
Energy contracts |  | 8,254,004 |  |  | 831,467 |  |  | (399,148) |  |  | 432,319 |  |  | (6,441) |  |  | 425,878 |
Foreign exchange contracts |  | 54,405 |  |  | 53,065 |  |  | — |  |  | 53,065 |  |  | — |  |  | 53,065 |
Equity option contracts |  | 3,316 |  |  | 54 |  |  | — |  |  | 54 |  |  | — |  |  | 54 |
Total customer risk management programs |  | 11,066,201 |  |  | 992,988 |  |  | (405,958) |  |  | 587,030 |  |  | (6,441) |  |  | 580,589 |
Trading |  | 20,644,156 |  |  | 224,648 |  |  | (37,111) |  |  | 187,537 |  |  | (181,917) |  |  | 5,620 |
Internal risk management programs |  | 2,244 |  |  | 1,264 |  |  | — |  |  | 1,264 |  |  | — |  |  | 1,264 |
Total derivative contracts |  | $ | 31,712,601 |  |  | $ | 1,218,900 |  |  | $ | (443,069) |  |  | $ | 775,831 |  |  | $ | (188,358) |  |  | $ | 587,473 |

1 Notional amounts for commodity contracts are converted into dollar-equivalent amounts based on dollar prices at the inception of the contract.
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The following summarizes the pre-tax net gains (losses) on derivative instruments and where they are recorded in the income statement (in thousands):

|  | Three Months Ended
|  | March 31, 2024 |  | March 31, 2023
|  | Brokerage and Trading Revenue |  | Gain (Loss) on Derivatives, Net |  | Brokerage and Trading Revenue |  | Gain (Loss) on Derivatives, Net
Customer risk management programs: |  |  |  |  |  |  |  |
Interest rate contracts |  | $ | 2,460 |  |  | $ | — |  |  | $ | 1,770 |  |  | $ | — |
Energy contracts |  | 3,815 |  |  | — |  |  | 6,553 |  |  | — |
Foreign exchange contracts |  | 50 |  |  | — |  |  | 31 |  |  | — |
Equity option contracts |  | — |  |  | — |  |  | — |  |  | — |
Total customer risk management programs |  | 6,325 |  |  | — |  |  | 8,354 |  |  | — |
Trading 1 |  | 83,706 |  |  | — |  |  | (63,093) |  |  | — |
Internal risk management programs |  | — |  |  | (8,633) |  |  | — |  |  | (1,344) |
Total derivative contracts |  | $ | 90,031 |  |  | $ | (8,633) |  |  | $ | (54,739) |  |  | $ | (1,344) |

1 Represents changes in fair value of to-be-announced securities and other derivative instruments held to mitigate market risk of trading securities portfolio, which is offset by changes in fair value of trading securities also included in Brokerage and Trading Revenue in the Consolidated Statements of Earnings.

(4) Loans and Allowances for Credit Losses
Loans
Loans are either secured or unsecured based on the type of loan and the financial condition of the borrower. Repayment is generally expected from cash flow or proceeds from the sale of selected assets of the borrower. BOK Financial is exposed to risk of loss on loans due to the borrower's difficulties, which may arise from any number of factors, including problems within the respective industry or local economic conditions. Access to collateral, in the event of borrower default, is reasonably assured through adherence to applicable lending laws and through sound lending standards and credit review procedures. Accounting policies for all loans, excluding residential mortgage loans guaranteed by U.S. government agencies, are as follows.
Interest is accrued at the applicable interest rate on the principal amount outstanding. Loans are placed on nonaccruing status when, in the opinion of management, full collection of principal or interest is uncertain. Internally risk graded loans are individually evaluated for nonaccruing status quarterly. Non-risk graded loans are generally placed on nonaccruing status when more than 90 days past due or within 60 days of being notified of the borrower's bankruptcy filing. Interest previously accrued but not collected is charged against interest income when the loan is placed on nonaccruing status. Accrued but not paid interest receivable is included in Receivables in the Consolidated Balance Sheets. Payments on nonaccruing loans are applied to principal or recognized as interest income, according to management's judgment as to the collectability of principal. Loans may be returned to accruing status when, in the opinion of management, full collection of principal and interest, including principal previously charged off, is probable based on improvements in the borrower's financial condition or a sustained period of performance.
For loans acquired with no evidence of credit deterioration, discounts are accreted on either an individual basis for loans with unique characteristics or on a pool basis for groups of homogeneous loans. Accretion is discontinued when a loan with an individually attributed discount is placed on nonaccruing status.
Modifications of loans to existing borrowers generally consist of interest rate reductions, extension of payment terms, or a combination of these. Modifications may arise either voluntarily through negotiations with the borrower or involuntarily through court order. Payment deferrals up to six months are generally considered to be short-term modifications. Generally, principal and accrued but unpaid interest are not voluntarily forgiven. A change to the allowance for credit losses is generally not recorded upon modification because the effect of most modifications made to borrowers experiencing financial difficulty is already included in the allowance methodology.
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Performing loans may be renewed under the current collateral value, debt service ratio and other underwriting standards. Nonaccruing loans may be renewed and will remain classified as nonaccruing.
Occasionally, loans, other than residential mortgage loans, may be held for sale in order to manage credit concentration. These loans are carried at the lower of cost or fair value with gains or losses recognized in Other gains (losses), net in the Consolidated Statements of Earnings.
All loans are charged off when the loan balance or a portion of the loan balance is no longer supported by the paying capacity of the borrower or when the required cash flow is reduced in a modification. The charge-off amount is determined through a quarterly evaluation of available cash resources and collateral values. Internally risk graded loans are evaluated quarterly, and charge-offs are taken in the quarter in which the loss is identified. Non-risk graded loans that are past due between 60 days and 180 days, based on the loan product type, are charged off. Loans to borrowers whose personal obligation has been discharged through Chapter 7 bankruptcy proceedings are charged off within 60 days of notice of the bankruptcy filing, regardless of payment status.
Loan origination and commitment fees and direct loan acquisition and origination costs are deferred and amortized as an adjustment to yield over the life of the loan or over the commitment period, as applicable. Amortization does not anticipate loan prepayments. Net unamortized fees are recognized in full at time of payoff.
Qualifying residential mortgage loans guaranteed by U.S. government agencies have been sold into GNMA pools. Under certain performance conditions specified in government programs, the Company may have the right, but not the obligation to repurchase loans from GNMA pools. These loans no longer qualify for sale accounting and are recognized in the Consolidated Balance Sheets. We do not expect to receive all principal and interest based on the loan's contractual terms. A portion of the principal balance continues to be guaranteed; however, interest accrues at a curtailed rate as specified in the programs. The carrying value of these loans is reduced based on an estimate of the expected cash flows discounted at the original note rate plus a liquidity spread. Guaranteed loans may be modified in accordance with U.S. government agency guidelines. Interest continues to accrue based on the modified rate. Guaranteed loans may either be resold into GNMA pools after a performance period specified by the programs or foreclosed and conveyed to the guarantors.
Loans are disaggregated into portfolio segments and further disaggregated into classes. The portfolio segment is the level at which the Company develops and documents a systematic method for determining its allowance for credit losses. Classes are a further disaggregation of portfolio segments based on the risk characteristics of the loans and the Company's method for monitoring and assessing credit risk.
Portfolio segments of the loan portfolio are as follows (in thousands):

|  | March 31, 2024 |  | December 31, 2023
|  | Fixed Rate |  | Variable Rate |  | Non-accrual |  | Total |  | Fixed Rate |  | Variable Rate |  | Non-accrual |  | Total
Commercial |  | $ | 3,597,543 |  |  | $ | 11,460,704 |  |  | $ | 74,620 |  |  | $ | 15,132,867 |  |  | $ | 3,558,563 |  |  | $ | 11,135,075 |  |  | $ | 110,131 |  |  | $ | 14,803,769 |
Commercial real estate |  | 784,301 |  |  | 4,430,289 |  |  | 22,087 |  |  | 5,236,677 |  |  | 791,757 |  |  | 4,538,570 |  |  | 7,320 |  |  | 5,337,647 |
Loans to individuals |  | 2,315,236 |  |  | 1,464,972 |  |  | 22,808 |  |  | 3,803,016 |  |  | 2,282,914 |  |  | 1,452,620 |  |  | 28,018 |  |  | 3,763,552 |
Total |  | $ | 6,697,080 |  |  | $ | 17,355,965 |  |  | $ | 119,515 |  |  | $ | 24,172,560 |  |  | $ | 6,633,234 |  |  | $ | 17,126,265 |  |  | $ | 145,469 |  |  | $ | 23,904,968 |

Credit Commitments
Commitments to extend credit are agreements to lend to a customer as long as there is no violation of conditions established in the contract. Commitments generally have fixed expiration dates or other termination clauses and may require payment of a fee. At March 31, 2024, outstanding commitments totaled $14.4 billion. Because some commitments are expected to expire before being drawn upon, the total commitment amounts do not necessarily represent future cash requirements. BOK Financial uses the same credit policies in making commitments as it does loans.
The amount of collateral obtained, if deemed necessary, is based upon management's credit evaluation of the borrower.
- 59 -

Standby letters of credit are conditional commitments issued to guarantee the performance of a customer to a third party. Because the credit risk involved in issuing standby letters of credit is essentially the same as that involved in extending loan commitments, BOK Financial uses the same credit policies in evaluating the creditworthiness of the customer. Additionally, BOK Financial uses the same evaluation process in obtaining collateral on standby letters of credit as it does for loan commitments. The term of these standby letters of credit is defined in each commitment and typically corresponds with the underlying loan commitment. At March 31, 2024, outstanding standby letters of credit totaled $734 million.
Allowances for Credit Losses and Accrual for Off-balance Sheet Credit Risk from Unfunded Loans Commitments
The allowance for loan losses and accrual for off-balance sheet credit risk from unfunded loan commitments represent the portion of the amortized cost basis of loans that we do not expect to collect over the asset's contractual life, considering past events, current conditions, and reasonable and supportable forecasts of future economic conditions. The appropriateness of the allowance for credit losses, including industry and product adjustments, is assessed quarterly by a senior management Allowance Committee. This review is based on an ongoing evaluation of the estimated expected credit losses in the portfolio and on unused commitments to provide financing. A well-documented methodology has been developed and is applied by an independent Credit Administration department to assure consistency across the Company.
The allowance for loan losses consists of specific allowances attributed to certain individual loans, generally nonaccruing loans, with dissimilar risk characteristics that have not yet been charged down to amounts we expect to recover and general allowances for estimated credit losses on pools of loans that share similar risk characteristics.
When full collection of principal or interest is uncertain, the loan's risk characteristics have changed, and we exclude the loan from the general allowance pool, typically designating it as nonaccruing. For these loans, a specific allowance reflects the expected credit loss.
We measure specific allowances for loans excluded from the general allowance pool by an evaluation of estimated future cash flows discounted at the loan's initial effective interest rate or the fair value of collateral for certain collateral dependent loans. For a non-collateral dependent loan, the specific allowance is the amount by which the loan's amortized cost basis exceeds its net realizable value. We measure the specific allowance for collateral dependent loans as the amount by which the loan's amortized cost basis exceeds its fair value. When repayment is expected to be provided substantially through the sale of collateral, we deduct estimated selling costs from the collateral's fair value. Generally, for real property held as collateral for loans, third-party appraisals that conform to Uniform Standards of Professional Appraisal Practice serve as the basis for the fair value of real property held as collateral. These appraised values are on an "as-is" basis and generally are not adjusted by the Company. We obtain updated appraisals at least annually or more frequently if market conditions indicate collateral values may have declined. For energy loans, our internal staff of engineers generally determines collateral value of mineral rights based on projected cash flows from proven oil and gas reserves under existing economic and operating conditions. For real property held as collateral for other loans, third-party appraisals that conform to Uniform Standards of Professional Appraisal Practice generally serve as the basis for the fair value. These appraised values are on an "as-is" basis and generally are not adjusted by the Company. We obtain updated appraisals at least annually or more frequently if market conditions indicate collateral values may have declined. Our special assets staff generally determines the value of other collateral based on projected liquidation cash flows under current market conditions. We evaluate collateral values and available cash resources quarterly. Historical statistics may be used to estimate specific allowances in limited situations, such as when a collateral dependent loan is removed from the general allowance pool near the end of a reporting period until an appraisal of collateral value is received or a full assessment of future cash flows is completed.
General allowances estimate expected credit losses on pools of loans sharing similar risk characteristics that are expected to occur over the loan's estimated remaining life. The loan's estimated remaining life represents the contractual term adjusted for amortization, estimates of prepayments, and borrower-owned extension options. Approximately 90% of the committed dollars in the loan portfolio is risk graded loans with general allowance model inputs that include probability of default, loss given default, and exposure at default. Probability of default is based on the migration of loans from performing to nonperforming using historical life of loan analysis periods. Loss given default is based on the aggregate losses incurred, net of estimated recoveries. Exposure at default represents an estimate of the outstanding amount of credit exposure at the time a default may occur.
Charge-off migration is used to calculate the general allowance for the majority of non-risk graded loans to individuals. The expected credit loss on less than 10% of the committed dollars in the portfolio is calculated using charge-off migration.
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The expected credit loss on approximately 1% of the committed dollars in the portfolio is calculated using a non-modeled approach. Specifically, the calculation applies a long-term net charge-off rate to the loan balances, adjusted for the weighted average remaining maturity of each portfolio.
In estimating the expected credit losses for general allowances on performing risk-graded loans, each portfolio class is assigned relevant economic loss drivers which best explain variations in portfolio net loss rates. The probability of default estimates for each portfolio class are adjusted for current and forecasted economic conditions. The result is applied to the exposure at default and loss given default to calculate the lifetime expected credit loss estimate. Selection of relevant economic loss drivers is re-evaluated periodically and involves statistical analysis as well as management judgment. The unemployment rate factors significantly in the allowance for loan losses calculation, affecting commercial and loans to individuals segments. Other primary factors impacting the commercial portfolio include BBB corporate spreads, real gross domestic product growth rate, and energy commodity prices. The primary commercial real estate variables are vacancy rate and BBB corporate spreads. In addition to the unemployment rate, the forecast for loans to individuals is tied to a home price index. The forecasts may include regional economic factors when localized conditions diverge from national conditions.
An Economic Forecast Committee, consisting of senior management with members largely independent of the allowance process develops a twelve-month forward-looking forecast for the relevant economic loss drivers. Management develops these forecasts based on external data as well as a view of future economic conditions which may include adjustments for regional conditions. The forecast includes three economic scenarios and probability weights for each scenario. The base forecast represents management's view of the most likely outcome, while the downside forecast reflects reasonably possible worsening economic conditions, and the upside forecast projects reasonably possible improving conditions.
At the end of the one-year reasonable and supportable forecast period, we transition from shorter-term expected losses to long-term loss averages for the loan's estimated remaining life. The difference between short-term loss forecasts and long-term loss averages is run-off over the reversion horizon, up to three years, depending on the forecasted economic scenarios.
General allowances also consider the estimated impact of factors that are not captured in the modeled results or historical experience. These factors may increase or decrease modeled results by amounts determined by the Allowance Committee. Factors not captured in modeled results or historical experience may include for example, new lines of business, market conditions that have not been previously encountered, observed changes in credit risk that are not yet reflected in macro-economic factors, or economic conditions that impact loss given default assumptions.
The accrual for off-balance sheet credit risk is maintained at a level that is appropriate to cover estimated losses associated with credit instruments that are not currently recognized as assets such as loan commitments, standby letters of credit or guarantees that are not unconditionally cancelable by the bank. This accrual is included in other liabilities in the Consolidated Balance Sheets. The appropriateness of the accrual is determined in the same manner as the allowance for loan losses, with the added consideration of commitment usage over the remaining life for those loans that the bank can not unconditionally cancel.
A provision for credit losses is charged against or credited to earnings in amounts necessary to maintain an appropriate Allowance for Credit Losses. Recoveries of loans previously charged off are added to the allowance when received.
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The activity in the allowance for loan losses and the allowance for off-balance sheet credit losses related to loan commitments and standby letters of credit is summarized as follows (in thousands):

|  | Three Months Ended
|  | March 31, 2024
|  | Commercial |  | Commercial Real Estate |  |  |  | Loans to Individuals |  |  |  | Total
Allowance for loan losses: |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | 141,232 |  |  | $ | 94,718 |  |  |  |  | $ | 41,173 |  |  |  |  | $ | 277,123 |
Provision for loan losses |  | 8,311 |  |  | 3,995 |  |  |  |  | (2,346) |  |  |  |  | 9,960 |
Loans charged off |  | (4,240) |  |  | (1,250) |  |  |  |  | (1,570) |  |  |  |  | (7,060) |
Recoveries of loans previously charged off |  | 964 |  |  | 16 |  |  |  |  | 620 |  |  |  |  | 1,600 |
Ending balance |  | $ | 146,267 |  |  | $ | 97,479 |  |  |  |  | $ | 37,877 |  |  |  |  | $ | 281,623 |
Allowance for off-balance sheet credit risk from unfunded loan commitments: |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | 19,762 |  |  | $ | 27,439 |  |  |  |  | $ | 1,776 |  |  |  |  | $ | 48,977 |
Provision for off-balance sheet credit risk |  | (1,972) |  |  | 426 |  |  |  |  | (112) |  |  |  |  | (1,658) |
Ending balance |  | $ | 17,790 |  |  | $ | 27,865 |  |  |  |  | $ | 1,664 |  |  |  |  | $ | 47,319 |

|  | Three Months Ended
|  | March 31, 2023
|  | Commercial |  | Commercial Real Estate |  |  |  | Loans to Individuals |  |  |  | Total
Allowance for loan losses: |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | 131,586 |  |  | $ | 57,648 |  |  |  |  | $ | 46,470 |  |  |  |  | $ | 235,704 |
Provision for loan losses |  | 6,330 |  |  | 10,426 |  |  |  |  | (2,231) |  |  |  |  | 14,525 |
Loans charged off |  | (12) |  |  | (2,208) |  |  |  |  | (1,447) |  |  |  |  | (3,667) |
Recoveries of loans previously charged off |  | 1,994 |  |  | 137 |  |  |  |  | 767 |  |  |  |  | 2,898 |
Ending balance |  | $ | 139,898 |  |  | $ | 66,003 |  |  |  |  | $ | 43,559 |  |  |  |  | $ | 249,460 |
Allowance for off-balance sheet credit risk from unfunded loan commitments: |  |  |  |  |  |  |  |  |  |  |  |
Beginning balance |  | $ | 18,246 |  |  | $ | 40,490 |  |  |  |  | $ | 2,183 |  |  |  |  | $ | 60,919 |
Provision for off-balance sheet credit risk |  | 2,362 |  |  | (279) |  |  |  |  | (59) |  |  |  |  | 2,024 |
Ending balance |  | $ | 20,608 |  |  | $ | 40,211 |  |  |  |  | $ | 2,124 |  |  |  |  | $ | 62,943 |

An $8.0 million provision for credit losses was necessary for the first quarter of 2024, reflecting continued loan growth and a stable economic outlook.
The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at March 31, 2024 is as follows (in thousands):

|  | Collectively Measured for General Allowances |  | Individually Measured for Specific Allowances |  | Total
|  | Recorded Investment |  | Related Allowance |  | Recorded Investment |  | Related Allowance |  | Recorded Investment |  | Related Allowance
Commercial |  | $ | 15,058,247 |  |  | $ | 143,307 |  |  | $ | 74,620 |  |  | $ | 2,960 |  |  | $ | 15,132,867 |  |  | $ | 146,267 |
Commercial real estate |  | 5,214,590 |  |  | 97,479 |  |  | 22,087 |  |  | — |  |  | 5,236,677 |  |  | 97,479 |
Loans to individuals |  | 3,780,208 |  |  | 37,877 |  |  | 22,808 |  |  | — |  |  | 3,803,016 |  |  | 37,877 |
Total |  | $ | 24,053,045 |  |  | $ | 278,663 |  |  | $ | 119,515 |  |  | $ | 2,960 |  |  | $ | 24,172,560 |  |  | $ | 281,623 |

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The allowance for loan losses and recorded investment of the related loans by portfolio segment for each measurement method at December 31, 2023 is as follows (in thousands):

|  | Collectively Measured for General Allowances |  | Individually Measured for Specific Allowances |  | Total
|  | Recorded Investment |  | Related Allowance |  | Recorded Investment |  | Related Allowance |  | Recorded Investment |  | Related Allowance
Commercial |  | $ | 14,693,638 |  |  | $ | 138,540 |  |  | $ | 110,131 |  |  | $ | 2,692 |  |  | $ | 14,803,769 |  |  | $ | 141,232 |
Commercial real estate |  | 5,330,327 |  |  | 94,718 |  |  | 7,320 |  |  | — |  |  | 5,337,647 |  |  | 94,718 |
Loans to individuals |  | 3,735,534 |  |  | 41,173 |  |  | 28,018 |  |  | — |  |  | 3,763,552 |  |  | 41,173 |
Total |  | $ | 23,759,499 |  |  | $ | 274,431 |  |  | $ | 145,469 |  |  | $ | 2,692 |  |  | $ | 23,904,968 |  |  | $ | 277,123 |

Credit Quality Indicators
The Company utilizes risk grading as primary credit quality indicators as it influences the probability of default which is a key attribute in the expected credit losses calculation. Substantially all commercial as well as commercial real estate loans and certain loans to individuals are risk graded based on a quarterly evaluation of the borrowers' ability to repay the loans. Certain commercial loans and most loans to individuals are small, homogeneous pools that are not risk-graded. The credit quality of these loans is based on past due days in accordance with regulatory guidelines.
We have included in the credit quality indicator "pass" loans that are in compliance with the original terms of the agreement and currently exhibit no factors that cause management to have doubts about the borrowers' ability to remain in compliance with the original terms of the agreement, which is consistent with the regulatory guideline of "pass". This also includes past due residential mortgages that are guaranteed by agencies of the U.S. government that continue to accrue interest based on criteria of the guarantors' programs.
Other loans especially mentioned ("Special Mention") are currently performing in compliance with the original terms of the agreement but may have a potential weakness that deserves management's close attention, consistent with regulatory guidelines. Non-graded loans 30 to 59 days past due are categorized as Special Mention.
The risk grading process identifies certain loans that have a well-defined weakness (for example, inadequate debt service coverage or liquidity or marginal capitalization; repayment may depend on collateral or other risk mitigation) that may jeopardize liquidation of the debt and represent a greater risk due to deterioration in the financial condition of the borrower. This is consistent with the regulatory guideline for "substandard". Because the borrowers are still performing in accordance with the original terms of the loan agreements, these loans remain on accruing status. Non-graded loans 60 to 89 days past due are categorized as Accruing Substandard.
Nonaccruing loans represent loans for which full collection of principal and interest is uncertain. This includes certain loans considered "substandard" and all loans considered "doubtful" by regulatory guidelines. Non-graded loans 90 or more days past due are categorized as Nonaccrual.
Probability of default is lowest for pass graded loans and increases for each credit quality indicator, Special Mention, and Accruing Substandard.
Vintage represents the year of origination, except for revolving loans which are considered in aggregate. Loans that were once revolving but have converted to term loans without additional underwriting appear in a separate vintage column.
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The following table summarizes the Company’s loan portfolio at March 31, 2024 by the risk grade categories and vintage (in thousands):

| Origination Year |  |  |
| 2024 | 2023 | 2022 | 2021 | 2020 | Prior | Revolving Loans | Revolving Loans Converted to Term Loans | Total
Commercial: |  |  |  |  |  |  |  |  |
Healthcare |  |  |  |  |  |  |  |  |
Pass | $ | 165,523 |  | $ | 638,346 |  | $ | 924,230 |  | $ | 573,778 |  | $ | 382,923 |  | $ | 1,095,684 |  | $ | 288,056 |  | $ | 14 |  | $ | 4,068,554 |
Special Mention | — |  | 15,000 |  | — |  | 1,254 |  | — |  | 20,027 |  | 855 |  | — |  | 37,136 |
Accruing Substandard | — |  | 1,492 |  | 429 |  | 18,397 |  | 58,753 |  | 10,896 |  | 975 |  | — |  | 90,942 |
Nonaccrual | — |  | — |  | — |  | — |  | — |  | 49,307 |  | — |  | — |  | 49,307 |
Total healthcare | 165,523 |  | 654,838 |  | 924,659 |  | 593,429 |  | 441,676 |  | 1,175,914 |  | 289,886 |  | 14 |  | 4,245,939 |
Loans charged off, year-to-date | — |  | — |  | — |  | — |  | — |  | 502 |  | — |  | — |  | 502 |
Services |  |  |  |  |  |  |  |  |
Pass | 183,565 |  | 786,684 |  | 514,841 |  | 380,227 |  | 219,684 |  | 725,856 |  | 677,588 |  | 534 |  | 3,488,979 |
Special Mention | — |  | — |  | 1,042 |  | 1,305 |  | 1,321 |  | 9,243 |  | 31 |  | — |  | 12,942 |
Accruing Substandard | — |  | — |  | 13,380 |  | 155 |  | 341 |  | 7,204 |  | 2,351 |  | 750 |  | 24,181 |
Nonaccrual | — |  | — |  | — |  | 1,487 |  | 349 |  | — |  | 1,483 |  | — |  | 3,319 |
Total services | 183,565 |  | 786,684 |  | 529,263 |  | 383,174 |  | 221,695 |  | 742,303 |  | 681,453 |  | 1,284 |  | 3,529,421 |
Loans charged off, year-to-date | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |
Energy |  |  |  |  |  |  |  |  |
Pass | 58,061 |  | 141,197 |  | 90,222 |  | 13,033 |  | 7,447 |  | 20,635 |  | 3,067,570 |  | — |  | 3,398,165 |
Special Mention | — |  | — |  | — |  | — |  | — |  | — |  | 13,950 |  | — |  | 13,950 |
Accruing Substandard | — |  | — |  | — |  | — |  | — |  | — |  | 16,613 |  | — |  | 16,613 |
Nonaccrual | — |  | — |  | — |  | — |  | — |  | 89 |  | 14,902 |  | — |  | 14,991 |
Total energy | 58,061 |  | 141,197 |  | 90,222 |  | 13,033 |  | 7,447 |  | 20,724 |  | 3,113,035 |  | — |  | 3,443,719 |
Loans charged off, year-to-date | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |
General business |  |  |  |  |  |  |  |  |
Pass | 285,096 |  | 845,326 |  | 383,429 |  | 215,106 |  | 134,121 |  | 378,163 |  | 1,569,156 |  | 1,945 |  | 3,812,342 |
Special Mention | — |  | 6,110 |  | 8,244 |  | 8,594 |  | — |  | 1,602 |  | 10,611 |  | 6 |  | 35,167 |
Accruing Substandard | — |  | 3,375 |  | 37,682 |  | 1,280 |  | 1,235 |  | 6,701 |  | 9,003 |  | — |  | 59,276 |
Nonaccrual | — |  | 994 |  | 101 |  | — |  | — |  | 42 |  | 5,862 |  | 4 |  | 7,003 |
Total general business | 285,096 |  | 855,805 |  | 429,456 |  | 224,980 |  | 135,356 |  | 386,508 |  | 1,594,632 |  | 1,955 |  | 3,913,788 |
Loans charged off, year-to-date | — |  | 27 |  | 1,399 |  | — |  | — |  | 158 |  | 2,154 |  | — |  | 3,738 |
Total commercial | 692,245 |  | 2,438,524 |  | 1,973,600 |  | 1,214,616 |  | 806,174 |  | 2,325,449 |  | 5,679,006 |  | 3,253 |  | 15,132,867 |
Commercial real estate: |  |  |  |  |  |  |  |  |
Pass | 18,763 |  | 418,504 |  | 2,059,848 |  | 1,061,396 |  | 386,041 |  | 1,127,922 |  | 119,823 |  | — |  | 5,192,297 |
Special Mention | — |  | 440 |  | — |  | — |  | — |  | 16,527 |  | — |  | — |  | 16,967 |
Accruing Substandard | — |  | — |  | — |  | — |  | — |  | 5,326 |  | — |  | — |  | 5,326 |
Nonaccrual | — |  | 2,992 |  | — |  | — |  | — |  | 19,095 |  | — |  | — |  | 22,087 |
Total commercial real estate | 18,763 |  | 421,936 |  | 2,059,848 |  | 1,061,396 |  | 386,041 |  | 1,168,870 |  | 119,823 |  | — |  | 5,236,677 |
Loans charged off, year-to-date | — |  | — |  | — |  | — |  | — |  | 1,250 |  | — |  | — |  | 1,250 |

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| Origination Year |  |  |
| 2024 | 2023 | 2022 | 2021 | 2020 | Prior | Revolving Loans | Revolving Loans Converted to Term Loans | Total
Loans to individuals: |  |  |  |  |  |  |  |  |
Residential mortgage |  |  |  |  |  |  |  |  |
Pass | 96,002 |  | 405,724 |  | 319,050 |  | 336,878 |  | 343,246 |  | 284,962 |  | 367,761 |  | 21,386 |  | 2,175,009 |
Special Mention | — |  | 225 |  | 167 |  | 3 |  | — |  | 161 |  | 3,290 |  | — |  | 3,846 |
Accruing Substandard | — |  | — |  | — |  | — |  | — |  | — |  | 279 |  | 1 |  | 280 |
Nonaccrual | — |  | 120 |  | 414 |  | 351 |  | 522 |  | 8,994 |  | 2,441 |  | 607 |  | 13,449 |
Total residential mortgage | 96,002 |  | 406,069 |  | 319,631 |  | 337,232 |  | 343,768 |  | 294,117 |  | 373,771 |  | 21,994 |  | 2,192,584 |
Loans charged off, year-to-date | — |  | — |  | — |  | — |  | — |  | 2 |  | 5 |  | — |  | 7 |
Residential mortgage guaranteed by U.S. government agencies |  |  |  |  |  |  |  |  |
Pass | — |  | 361 |  | 3,012 |  | 2,204 |  | 3,806 |  | 120,856 |  | — |  | — |  | 130,239 |
Nonaccrual | — |  | — |  | — |  | — |  | 280 |  | 8,937 |  | — |  | — |  | 9,217 |
Total residential mortgage guaranteed by U.S. government agencies | — |  | 361 |  | 3,012 |  | 2,204 |  | 4,086 |  | 129,793 |  | — |  | — |  | 139,456 |
Personal: |  |  |  |  |  |  |  |  |
Pass | 91,355 |  | 215,282 |  | 210,876 |  | 145,542 |  | 124,996 |  | 186,791 |  | 493,653 |  | 100 |  | 1,468,595 |
Special Mention | — |  | 28 |  | 13 |  | 51 |  | 13 |  | 3 |  | — |  | — |  | 108 |
Accruing Substandard | — |  | — |  | 24 |  | — |  | 1 |  | 144 |  | 1,962 |  | — |  | 2,131 |
Nonaccrual | — |  | 31 |  | 29 |  | 12 |  | 9 |  | 12 |  | 32 |  | 17 |  | 142 |
Total personal | 91,355 |  | 215,341 |  | 210,942 |  | 145,605 |  | 125,019 |  | 186,950 |  | 495,647 |  | 117 |  | 1,470,976 |
Loans charged off, year-to-date 1 | 1,461 |  | 40 |  | 45 |  | 12 |  | — |  | — |  | — |  | 5 |  | 1,563 |
Total loans to individuals | 187,357 |  | 621,771 |  | 533,585 |  | 485,041 |  | 472,873 |  | 610,860 |  | 869,418 |  | 22,111 |  | 3,803,016 |
Total loans | $ | 898,365 |  | $ | 3,482,231 |  | $ | 4,567,033 |  | $ | 2,761,053 |  | $ | 1,665,088 |  | $ | 4,105,179 |  | $ | 6,668,247 |  | $ | 25,364 |  | $ | 24,172,560 |

1 Includes charge-offs on deposit overdrafts, which are generally charged off at 60 days past due.
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The following table summarizes the Company's loan portfolio at December 31, 2023 by the risk grade categories and vintage (in thousands):

| Origination Year |  |  |
| 2023 | 2022 | 2021 | 2020 | 2019 | Prior | Revolving Loans | Revolving Loans Converted to Term Loans | Total
Commercial: |  |  |  |  |  |  |  |  |
Healthcare |  |  |  |  |  |  |  |  |
Pass | 650,768 |  | 895,602 |  | 590,736 |  | 409,001 |  | 331,897 |  | 809,858 |  | 281,378 |  | 15 |  | 3,969,255 |
Special Mention | — |  | — |  | — |  | 21,791 |  | — |  | 31,235 |  | 5 |  | — |  | 53,031 |
Accruing Substandard | — |  | 2,128 |  | 18,508 |  | 6,911 |  | — |  | 10,896 |  | 975 |  | — |  | 39,418 |
Nonaccrual | — |  | — |  | — |  | 30,290 |  | 23,129 |  | 28,110 |  | — |  | — |  | 81,529 |
Total healthcare | 650,768 |  | 897,730 |  | 609,244 |  | 467,993 |  | 355,026 |  | 880,099 |  | 282,358 |  | 15 |  | 4,143,233 |
Loans charged off, year-to-date | — |  | — |  | — |  | — |  | 2,500 |  | — |  | — |  | — |  | 2,500 |
Services |  |  |  |  |  |  |  |  |
Pass | 900,090 |  | 526,776 |  | 401,872 |  | 228,818 |  | 106,112 |  | 643,477 |  | 730,729 |  | 595 |  | 3,538,469 |
Special Mention | — |  | 1,085 |  | 1,520 |  | 1,341 |  | 534 |  | 4,522 |  | 81 |  | — |  | 9,083 |
Accruing Substandard | — |  | 13,712 |  | 178 |  | 326 |  | 3,972 |  | 3,746 |  | 3,108 |  | 13 |  | 25,055 |
Nonaccrual | — |  | — |  | 1,635 |  | 338 |  | — |  | — |  | 1,643 |  | — |  | 3,616 |
Total services | 900,090 |  | 541,573 |  | 405,205 |  | 230,823 |  | 110,618 |  | 651,745 |  | 735,561 |  | 608 |  | 3,576,223 |
Loans charged off, year-to-date | — |  | — |  | 3,060 |  | — |  | — |  | — |  | 2,642 |  | — |  | 5,702 |
Energy |  |  |  |  |  |  |  |  |
Pass | $ | 190,122 |  | $ | 100,006 |  | $ | 43,769 |  | $ | 7,876 |  | $ | 9,562 |  | $ | 11,583 |  | $ | 3,025,590 |  | $ | — |  | $ | 3,388,508 |
Special Mention | — |  | — |  | — |  | — |  | — |  | — |  | 13,950 |  | — |  | 13,950 |
Accruing Substandard | — |  | — |  | — |  | — |  | — |  | — |  | 16,800 |  | — |  | 16,800 |
Nonaccrual | — |  | — |  | — |  | — |  | — |  | 99 |  | 17,744 |  | — |  | 17,843 |
Total energy | 190,122 |  | 100,006 |  | 43,769 |  | 7,876 |  | 9,562 |  | 11,682 |  | 3,074,084 |  | — |  | 3,437,101 |
Loans charged off, year-to-date | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |  | — |
General business |  |  |  |  |  |  |  |  |
Pass | 942,468 |  | 436,832 |  | 224,735 |  | 138,951 |  | 101,100 |  | 287,744 |  | 1,389,128 |  | 2,164 |  | 3,523,122 |
Special Mention | 10,264 |  | 16,167 |  | 8,420 |  | 1,253 |  | 321 |  | 8,295 |  | 897 |  | — |  | 45,617 |
Accruing Substandard | 4,401 |  | 33,194 |  | 1,716 |  | 27 |  | — |  | — |  | 31,992 |  | — |  | 71,330 |
Nonaccrual | — |  | 1,134 |  | — |  | — |  | — |  | 48 |  | 5,956 |  | 5 |  | 7,143 |
Total general business | 957,133 |  | 487,327 |  | 234,871 |  | 140,231 |  | 101,421 |  | 296,087 |  | 1,427,973 |  | 2,169 |  | 3,647,212 |
Loans charged off, year-to-date | — |  | — |  | 4,598 |  | 2 |  | — |  | 48 |  | 10 |  | 38 |  | 4,696 |
Total commercial | 2,698,113 |  | 2,026,636 |  | 1,293,089 |  | 846,923 |  | 576,627 |  | 1,839,613 |  | 5,519,976 |  | 2,792 |  | 14,803,769 |
Commercial real estate: |  |  |  |  |  |  |  |  |
Pass | 396,891 |  | 1,941,913 |  | 1,194,759 |  | 416,647 |  | 513,555 |  | 705,092 |  | 136,095 |  | — |  | 5,304,952 |
Special Mention | — |  | 476 |  | — |  | — |  | — |  | 19,171 |  | — |  | — |  | 19,647 |
Accruing Substandard | 2,992 |  | — |  | 3 |  | — |  | — |  | 2,733 |  | — |  | — |  | 5,728 |
Nonaccrual | — |  | — |  | — |  | — |  | 7,170 |  | 150 |  | — |  | — |  | 7,320 |
Total commercial real estate | 399,883 |  | 1,942,389 |  | 1,194,762 |  | 416,647 |  | 520,725 |  | 727,146 |  | 136,095 |  | — |  | 5,337,647 |
Loans charged off, year-to-date | — |  | — |  | — |  | — |  | — |  | 8,446 |  | — |  | — |  | 8,446 |

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| Origination Year |  |  |
| 2023 | 2022 | 2021 | 2020 | 2019 | Prior | Revolving Loans | Revolving Loans Converted to Term Loans | Total
Loans to individuals: |  |  |  |  |  |  |  |  |
Residential mortgage |  |  |  |  |  |  |  |  |
Pass | 426,089 |  | 320,733 |  | 342,927 |  | 349,742 |  | 54,801 |  | 243,356 |  | 375,739 |  | 23,895 |  | 2,137,282 |
Special Mention | 157 |  | 140 |  | 131 |  | 1,361 |  | 18 |  | 134 |  | 2,982 |  | 93 |  | 5,016 |
Accruing Substandard | — |  | 150 |  | — |  | — |  | 37 |  | 49 |  | 50 |  | — |  | 286 |
Nonaccrual | 79 |  | 1,419 |  | 237 |  | 544 |  | 344 |  | 12,381 |  | 2,387 |  | 665 |  | 18,056 |
Total residential mortgage | 426,325 |  | 322,442 |  | 343,295 |  | 351,647 |  | 55,200 |  | 255,920 |  | 381,158 |  | 24,653 |  | 2,160,640 |
Loans charged off, year-to-date | — |  | — |  | 51 |  | 4 |  | — |  | 17 |  | — |  | 1 |  | 73 |
Residential mortgage guaranteed by U.S. government agencies |  |  |  |  |  |  |  |  |
Pass | 633 |  | 1,788 |  | 2,220 |  | 4,297 |  | 6,441 |  | 124,719 |  | — |  | — |  | 140,098 |
Nonaccrual | — |  | — |  | — |  | 280 |  | 375 |  | 9,054 |  | — |  | — |  | 9,709 |
Total residential mortgage guaranteed by U.S. government agencies | 633 |  | 1,788 |  | 2,220 |  | 4,577 |  | 6,816 |  | 133,773 |  | — |  | — |  | 149,807 |
Personal: |  |  |  |  |  |  |  |  |
Pass | 218,401 |  | 229,580 |  | 149,291 |  | 136,215 |  | 75,348 |  | 137,629 |  | 503,841 |  | 145 |  | 1,450,450 |
Special Mention | 66 |  | 39 |  | 106 |  | 30 |  | 8 |  | — |  | 1,918 |  | 3 |  | 2,170 |
Accruing Substandard | — |  | 64 |  | 12 |  | 9 |  | 144 |  | — |  | 3 |  | — |  | 232 |
Nonaccrual | 4 |  | 51 |  | 9 |  | 16 |  | 3 |  | 12 |  | 158 |  | — |  | 253 |
Total personal | 218,471 |  | 229,734 |  | 149,418 |  | 136,270 |  | 75,503 |  | 137,641 |  | 505,920 |  | 148 |  | 1,453,105 |
Loans charged off, year-to-date 1 | 5,636 |  | 82 |  | 96 |  | 43 |  | — |  | 10 |  | 6 |  | 26 |  | 5,899 |
Total loans to individuals | 645,429 |  | 553,964 |  | 494,933 |  | 492,494 |  | 137,519 |  | 527,334 |  | 887,078 |  | 24,801 |  | 3,763,552 |
Total loans | $ | 3,743,425 |  | $ | 4,522,989 |  | $ | 2,982,784 |  | $ | 1,756,064 |  | $ | 1,234,871 |  | $ | 3,094,093 |  | $ | 6,543,149 |  | $ | 27,593 |  | $ | 23,904,968 |

1 Includes charge-offs on deposit overdrafts, which are generally charged off at 60 days past due.
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Nonaccruing Loans
A summary of nonaccruing loans at March 31, 2024 follows (in thousands):

| As of March 31, 2024
| Total |  | With No Allowance |  | With Allowance |  | Related Allowance
Commercial: |  |  |  |  |  |  |
Healthcare | $ | 49,307 |  |  | $ | 9,668 |  |  | $ | 39,639 |  |  | $ | 2,100 |
Services | 3,319 |  |  | 1,542 |  |  | 1,777 |  |  | 460 |
Energy | 14,991 |  |  | 14,991 |  |  | — |  |  | — |
General business | 7,003 |  |  | 6,362 |  |  | 641 |  |  | 400 |
Total commercial | 74,620 |  |  | 32,563 |  |  | 42,057 |  |  | 2,960 |
Commercial real estate | 22,087 |  |  | 22,087 |  |  | — |  |  | — |
Loans to individuals: |  |  |  |  |  |  |
Residential mortgage | 13,449 |  |  | 13,449 |  |  | — |  |  | — |
Residential mortgage guaranteed by U.S. government agencies | 9,217 |  |  | 9,217 |  |  | — |  |  | — |
Personal | 142 |  |  | 142 |  |  | — |  |  | — |
Total loans to individuals | 22,808 |  |  | 22,808 |  |  | — |  |  | — |
Total | $ | 119,515 |  |  | $ | 77,458 |  |  | $ | 42,057 |  |  | $ | 2,960 |

A summary of nonaccruing loans at December 31, 2023 follows (in thousands):

| As of December 31, 2023
| Total |  | With No Allowance |  | With Allowance |  | Related Allowance
Commercial: |  |  |  |  |  |  |
Healthcare | $ | 81,529 |  |  | $ | 40,372 |  |  | $ | 41,157 |  |  | $ | 1,478 |
Services | 3,616 |  |  | 1,684 |  |  | 1,932 |  |  | 1,214 |
Energy | 17,843 |  |  | 17,843 |  |  | — |  |  | — |
General business | 7,143 |  |  | 7,143 |  |  | — |  |  | — |
Total commercial | 110,131 |  |  | 67,042 |  |  | 43,089 |  |  | 2,692 |
Commercial real estate | 7,320 |  |  | 7,320 |  |  | — |  |  | — |
Loans to individuals: |  |  |  |  |  |  |
Residential mortgage | 18,056 |  |  | 18,056 |  |  | — |  |  | — |
Residential mortgage guaranteed by U.S. government agencies | 9,709 |  |  | 9,709 |  |  | — |  |  | — |
Personal | 253 |  |  | 253 |  |  | — |  |  | — |
Total loans to individuals | 28,018 |  |  | 28,018 |  |  | — |  |  | — |
Total | $ | 145,469 |  |  | $ | 102,380 |  |  | $ | 43,089 |  |  | $ | 2,692 |

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Loan Modifications to Borrowers Experiencing Financial Difficulty
At March 31, 2024 the Company had $52 million of loan modifications to borrowers experiencing financial difficulty, including $47 million of healthcare loans. Modifications generally consist of interest rate reductions, an other than insignificant payment delay, term extension or a combination. Approximately $51 million of the modifications are term extensions of healthcare, services and general business loans, and $1.8 million are combination modifications to loans to individuals. During the three months ended March 31, 2024, $4.2 million of residential mortgage loans guaranteed by U.S. government agencies that were modified in the previous twelve months defaulted. A payment default is defined as being 30 or more days past due after modification.
At March 31, 2023, the Company had $35 million of loan modifications to borrowers experiencing financial difficulty, including $26 million of healthcare loans and $8.4 million of residential mortgage loans guaranteed by U.S. government agencies, with the entirety of these modifications being combination modifications. During the three months ended March 31, 2023, $511 thousand of residential mortgage loans guaranteed by U.S. government agencies were modified and subsequently defaulted.
Past Due Loans
Past due status for all loan classes is based on the actual number of days since the last payment was due according to the contractual terms of the loans, as modified for short-term payment deferral forbearance.
A summary of loans currently performing and past due as of March 31, 2024 is as follows (in thousands):

|  |  |  | Past Due |  |  |  | Past Due 90 Days or More and Accruing
|  | Current |  | 30 to 59 Days |  | 60 to 89 Days |  | 90 Days or More |  | Total |
Commercial: |  |  |  |  |  |  |  |  |  |  |  |
Healthcare |  | $ | 4,206,313 |  |  | $ | — |  |  | $ | — |  |  | $ | 39,626 |  |  | $ | 4,245,939 |  |  | $ | — |
Services |  | 3,528,567 |  |  | 485 |  |  | 20 |  |  | 349 |  |  | 3,529,421 |  |  | — |
Energy |  | 3,443,719 |  |  | — |  |  | — |  |  | — |  |  | 3,443,719 |  |  | — |
General business |  | 3,905,270 |  |  | 2,054 |  |  | 209 |  |  | 6,255 |  |  | 3,913,788 |  |  | — |
Total commercial |  | 15,083,869 |  |  | 2,539 |  |  | 229 |  |  | 46,230 |  |  | 15,132,867 |  |  | — |
Commercial real estate |  | 5,214,737 |  |  | 11,800 |  |  | — |  |  | 10,140 |  |  | 5,236,677 |  |  | — |
Loans to individuals: |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage |  | 2,183,027 |  |  | 7,139 |  |  | 737 |  |  | 1,681 |  |  | 2,192,584 |  |  | — |
Residential mortgage guaranteed by U.S. government agencies |  | 55,886 |  |  | 22,873 |  |  | 15,080 |  |  | 45,617 |  |  | 139,456 |  |  | 41,364 |
Personal |  | 1,469,874 |  |  | 1,055 |  |  | 24 |  |  | 23 |  |  | 1,470,976 |  |  | — |
Total loans to individuals |  | 3,708,787 |  |  | 31,067 |  |  | 15,841 |  |  | 47,321 |  |  | 3,803,016 |  |  | 41,364 |
Total |  | $ | 24,007,393 |  |  | $ | 45,406 |  |  | $ | 16,070 |  |  | $ | 103,691 |  |  | $ | 24,172,560 |  |  | $ | 41,364 |

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A summary of loans currently performing and past due as of December 31, 2023 is as follows (in thousands):

|  |  |  | Past Due |  |  |  | Past Due 90 Days or More and Accruing
|  | Current |  | 30 to 59 Days |  | 60 to 89 Days |  | 90 Days or More |  | Total |
Commercial: |  |  |  |  |  |  |  |  |  |  |  |
Healthcare |  | $ | 4,071,336 |  |  | $ | 18,019 |  |  | $ | 30,290 |  |  | $ | 23,588 |  |  | $ | 4,143,233 |  |  | $ | — |
Services |  | 3,575,787 |  |  | 2 |  |  | — |  |  | 434 |  |  | 3,576,223 |  |  | — |
Energy |  | 3,437,101 |  |  | — |  |  | — |  |  | — |  |  | 3,437,101 |  |  | — |
General business |  | 3,639,775 |  |  | 412 |  |  | 1,157 |  |  | 5,868 |  |  | 3,647,212 |  |  | — |
Total commercial |  | 14,723,999 |  |  | 18,433 |  |  | 31,447 |  |  | 29,890 |  |  | 14,803,769 |  |  | — |
Commercial real estate |  | 5,327,481 |  |  | 2,992 |  |  | — |  |  | 7,174 |  |  | 5,337,647 |  |  | 3 |
Loans to individuals: |  |  |  |  |  |  |  |  |  |  |  |
Residential mortgage |  | 2,149,927 |  |  | 6,340 |  |  | 1,494 |  |  | 2,879 |  |  | 2,160,640 |  |  | 36 |
Residential mortgage guaranteed by U.S. government agencies |  | 54,122 |  |  | 25,085 |  |  | 17,053 |  |  | 53,547 |  |  | 149,807 |  |  | 48,201 |
Personal |  | 1,450,302 |  |  | 2,561 |  |  | 88 |  |  | 154 |  |  | 1,453,105 |  |  | 131 |
Total loans to individuals |  | 3,654,351 |  |  | 33,986 |  |  | 18,635 |  |  | 56,580 |  |  | 3,763,552 |  |  | 48,368 |
Total |  | $ | 23,705,831 |  |  | $ | 55,411 |  |  | $ | 50,082 |  |  | $ | 93,644 |  |  | $ | 23,904,968 |  |  | $ | 48,371 |

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(5) Mortgage Banking Activities
Residential Mortgage Loan Production
The Company originates, markets and services conventional and government-sponsored residential mortgage loans. Generally, conforming fixed-rate residential mortgage loans are held for sale in the secondary market, and non-conforming and adjustable-rate residential mortgage loans are retained for investment. Residential mortgage loans originated for sale by the Company are carried at fair value based on sales commitments and market quotes. Changes in the fair value of mortgage loans held for sale are included in Other operating revenue – Mortgage banking revenue. Residential mortgage loans held for sale also includes the fair value of residential mortgage loan commitments and forward sales commitments, which are considered derivative contracts that have not been designated as hedging instruments for accounting purposes. The volume of mortgage loans originated for sale and secondary market prices are the primary drivers of originating and marketing revenue.
Residential mortgage loan commitments are generally outstanding for 60 to 90 days, which represents the typical period from commitment to originate a residential mortgage loan to when the closed loan is sold to an investor. Residential mortgage loan commitments are subject to both credit and interest rate risk. Credit risk is managed through underwriting policies and procedures, including collateral requirements, which are generally accepted by the secondary loan markets. Exposure to interest rate fluctuations is partially managed through forward sales of residential mortgage-backed securities and forward sales contracts. These latter contracts set the price for loans that will be delivered in the next 60 to 90 days.
The unpaid principal balance of residential mortgage loans held for sale, notional amounts of derivative contracts related to residential mortgage loan commitments and forward contract sales and their related fair values included in Mortgage loans held for sale on the Consolidated Balance Sheets were (in thousands):

|  | March 31, 2024 |  | December 31, 2023
|  | Unpaid Principal Balance/ Notional |  | Fair Value |  | Unpaid Principal Balance/ Notional |  | Fair Value
Residential mortgage loans held for sale |  | $ | 73,937 |  |  | $ | 73,090 |  |  | $ | 56,922 |  |  | $ | 56,457 |
Residential mortgage loan commitments |  | 67,951 |  |  | 2,473 |  |  | 34,783 |  |  | 1,379 |
Forward sales contracts |  | 108,070 |  |  | (114) |  |  | 75,448 |  |  | (901) |
|  |  |  | $ | 75,449 |  |  |  |  | $ | 56,935 |

No residential mortgage loans held for sale were 90 days or more past due or considered impaired as of March 31, 2024 or December 31, 2023. No credit losses were recognized on residential mortgage loans held for sale for the three month period ended March 31, 2024 and 2023.
Mortgage banking revenue was as follows (in thousands):

|  | Three Months Ended March 31, |  |
|  | 2024 |  | 2023 |  |  |  |
Production revenue: |  |  |  |  |  |  |  |
Net realized gains (losses) on sale of mortgage loans |  | $ | 2,026 |  |  | $ | (1,731) |  |  |  |  |
Net change in unrealized gain (loss) on mortgage loans held for sale |  | (382) |  |  | 370 |  |  |  |  |
Net change in the fair value of mortgage loan commitments |  | 1,094 |  |  | 1,640 |  |  |  |  |
Net change in the fair value of forward sales contracts |  | 787 |  |  | (912) |  |  |  |  |
Total production revenue (loss) |  | 3,525 |  |  | (633) |  |  |  |  |
Servicing revenue |  | 15,442 |  |  | 15,000 |  |  |  |  |
Total mortgage banking revenue |  | $ | 18,967 |  |  | $ | 14,367 |  |  |  |  |

Production revenue includes gain (loss) on residential mortgage loans held for sale and changes in the fair value of derivative contracts not designated as hedging instruments for accounting purposes related to residential mortgage loan commitments and forward sales contracts. Servicing revenue includes servicing fee income and late charges on loans serviced for others.
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Residential Mortgage Servicing
Mortgage servicing rights may be originated or purchased. Both originated and purchased mortgage servicing rights are initially recognized at fair value. The Company has elected to carry all mortgage servicing rights at fair value. Changes in the fair value are recognized in earnings as they occur. The unpaid principal balance of loans serviced for others is the primary driver of servicing revenue.
The following represents a summary of mortgage servicing rights (dollars in thousands):

|  | March 31, 2024 |  | December 31, 2023
Number of residential mortgage loans serviced for others |  | 122,276 |  |  | 115,967 |
Outstanding principal balance of residential mortgage loans serviced for others |  | $ | 21,432,048 |  |  | $ | 20,382,192 |
Weighted average interest rate |  | 3.66 | % |  | 3.64 | %
Remaining term (in months) |  | 278 |  | 280

The following represents activity in capitalized mortgage servicing rights (in thousands):

|  | Three Months Ended March 31, |  |
|  | 2024 |  | 2023 |  |  |  |
Beginning Balance |  | $ | 293,884 |  |  | $ | 277,608 |  |  |  |  |
Additions |  | 2,516 |  |  | 2,500 |  |  |  |  |
Acquisitions |  | 17,400 |  |  | 31,138 |  |  |  |  |
Change in fair value due to principal payments |  | (5,447) |  |  | (5,384) |  |  |  |  |
Change in fair value due to market assumption changes |  | 10,977 |  |  | (6,059) |  |  |  |  |
Ending Balance |  | $ | 319,330 |  |  | $ | 299,803 |  |  |  |  |

Changes in the fair value of mortgage servicing rights due to market assumption changes are included in Other operating revenue in the Consolidated Statements of Earnings. Changes in fair value due to principal payments are included in Mortgage banking costs.
Mortgage servicing rights are not traded in active markets. Fair value is determined by discounting the projected net cash flows. Significant market assumptions used to determine fair value based on significant unobservable inputs were as follows:

|  | March 31, 2024 |  | December 31, 2023
Discount rate – risk-free rate plus a market premium |  | 9.82% |  | 9.72%
Prepayment rate - based upon loan interest rate, original term and loan type |  | 6.83% |  | 7.34%
Loan servicing costs – annually per loan based upon loan type: |  |  |  |
Performing loans |  | $73 - $94 |  | $69 - $94
Delinquent loans |  | $150 - $500 |  | $150 - $500
Loans in foreclosure |  | $875 - $8,000 |  | $875 - $8,000
Escrow earnings rate – indexed to rates paid on deposit accounts with comparable average life |  | 4.27% |  | 3.90%
Primary/secondary mortgage rate spread |  | 115 bps |  | 105 bps
Delinquency rate |  | 2.06% |  | 2.06%

Changes in primary residential mortgage interest rates directly affect the prepayment speeds used in valuing our mortgage servicing rights. A separate third-party model is used to estimate prepayment speeds based on interest rates, housing turnover rates, estimated loan curtailment, anticipated defaults and other relevant factors. The prepayment model is updated periodically for changes in market conditions and adjusted to better correlate with actual performance of BOK Financial's servicing portfolio.
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(6) Commitments and Contingent Liabilities
Litigation Contingencies
As a member of Visa, BOK Financial is obligated for a proportionate share of certain covered litigation losses incurred by Visa under a retrospective responsibility plan. A contingent liability was recognized for the Company’s share of Visa’s covered litigation liabilities. Visa funded an escrow account to cover litigation claims, including covered litigation losses under the retrospective responsibility plan, with proceeds from its initial public offering in 2008 and from available cash.
BOK Financial currently owns 252,233 Visa Class B-1 shares (formerly Class B). On January 23, 2024, Visa, Inc. stockholders approved an option to convert up to 50% of our Class B-1 shares to Visa Class C shares and subsequently to freely transferable Visa Class A common shares (the "Exchange Offer") subject to holding periods and certain other conditions contained in the Exchange Offer. The Exchange Offer opened on April 8, 2024, and is scheduled to expire at the end of the day on May 3, 2024. The Company tendered its Class B-1 Visa shares under the Exchange Offer and expects to monetize up to 50% of the Class B-1 shares. Conversion of Class B-1 shares would not reduce our proportionate share of the covered litigation losses which may dilute our remaining Class B shares if the escrow fund is not adequate to cover final litigation costs.
BOKF, NA is subject to litigation related to its role as Indenture Trustee for multiple municipal bonds to which Christopher Brogdon acted as borrower. The principal amount of the bonds remaining unpaid at this time is $33 million. Mr. Brogdon is obligated to pay the bonds in full by virtue of a Judgment in the USDC of New Jersey which allows the Securities and Exchange Commission to pursue collection to satisfy the Judgment, which the SEC continues to pursue. The remaining cases are (i) Robert Elliot & Marvin Loeb on behalf of a class of persons purchasing bonds in multiple municipal bond issuances v. BOKF, NA, USDC District of New Jersey, Case No. 2:16-cv-05218-KM-JBC (commenced 11/20/2015); and (ii) Burn Rose, LLC et al v. BOKF, NA d/b/a BOK, Tulsa County District Court Case, No. CJ-2016-03325 (commenced 9/22/2016). In the New Jersey Class Action and the Tulsa County Burn Rose action, the claimants allege that BOKF, NA was complicit in the fraud committed by Mr. Brogdon. BOKF, NA has multiple defenses to the claims, including the defense that it is exculpated by the terms of the various bond indentures. No action has been taken in the class action by the plaintiffs to establish the class and the amount of the damages, if any, cannot be reasonably estimated. Approximately $3 million is claimed as damages in the Burn Rose action. Management is advised that a loss on the claims in both the Class Action and the Burn Rose action is not probable.
In the ordinary course of business, BOK Financial and its subsidiaries are subject to legal actions and complaints. Management believes, based upon the opinion of counsel, that the actions and liability or loss, if any, resulting from the final outcomes of the proceedings, will not have a material effect on the Company's financial condition, results of operations or cash flows.
Alternative Investment Commitments
The Company invests in several tax credit entities and other funds as permitted by banking regulations. Consolidation of these investments is based on the variable interest model.
At March 31, 2024, the Company has $405 million in interests in various alternative investments generally consisting of unconsolidated limited partnership interests in entities for which investment return is in the form of low income housing tax credits or other investments in merchant banking activities. These investments are recognized in Other assets on the Consolidated Balance Sheets. This investment balance also includes $99 million of unfunded commitments included in Other liabilities on the Consolidated Balance Sheets.
(7) Shareholders' Equity
On April 30, 2024, the Company declared a quarterly cash dividend of $0.55 per common share payable on or about May 30, 2024 to shareholders of record as of May 15, 2024.
Dividends declared were $0.55 per share during the three months ended March 31, 2024 and $0.54 per share during the three months ended March 31, 2023.
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Accumulated Other Comprehensive Income (Loss)
AOCI includes unrealized gains and losses on AFS securities. AOCI also includes unrealized losses on AFS securities that were transferred from AFS to investment securities in the second quarter of 2022. Such amounts are being amortized over the estimated remaining life of the security as an adjustment to yield, offsetting the related amortization of premium on the transferred securities. Gains and losses in AOCI are net of deferred income taxes.
A rollforward of the components of accumulated other comprehensive income (loss) is included as follows (in thousands):

|  | Unrealized Gain (Loss) on |  |  |  |  |  |
|  | Available for Sale Securities |  | Investment Securities Transferred from AFS |  |  |  |  |  | Total
Balance, Dec. 31, 2022 |  | $ | (664,618) |  |  | $ | (172,337) |  |  |  |  |  |  | (836,955) |
Net change in unrealized gain (loss) |  | 124,045 |  |  | — |  |  |  |  |  |  | 124,045 |
Reclassification adjustments included in earnings: |  |  |  |  |  |  |  |  |  |
Interest revenue, Investment securities |  | — |  |  | 16,051 |  |  |  |  |  |  | 16,051 |
Other comprehensive income, before income taxes |  | 124,045 |  |  | 16,051 |  |  |  |  |  |  | 140,096 |
Federal and state income taxes |  | 28,179 |  |  | 3,516 |  |  |  |  |  |  | 31,695 |
Other comprehensive income, net of income taxes |  | 95,866 |  |  | 12,535 |  |  |  |  |  |  | 108,401 |
Balance, March 31, 2023 |  | $ | (568,752) |  |  | $ | (159,802) |  |  |  |  |  |  | $ | (728,554) |
Balance, Dec. 31, 2023 |  | $ | (473,212) |  |  | $ | (125,888) |  |  |  |  |  |  | $ | (599,100) |
Net change in unrealized gain (loss) |  | (71,806) |  |  | — |  |  |  |  |  |  | (71,806) |
Reclassification adjustments included in earnings: |  |  |  |  |  |  |  |  |  |
Interest revenue, Investment securities |  | — |  |  | 12,183 |  |  |  |  |  |  | 12,183 |
Loss on available for sale securities, net |  | 45,171 |  |  | — |  |  |  |  |  |  | 45,171 |
Other comprehensive income (loss), before income taxes |  | (26,635) |  |  | 12,183 |  |  |  |  |  |  | (14,452) |
Federal and state income taxes |  | (6,289) |  |  | 2,865 |  |  |  |  |  |  | (3,424) |
Other comprehensive income (loss), net of income taxes |  | (20,346) |  |  | 9,318 |  |  |  |  |  |  | (11,028) |
Balance, March 31, 2024 |  | $ | (493,558) |  |  | $ | (116,570) |  |  |  |  |  |  | $ | (610,128) |

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(8) Earnings Per Share

(In thousands, except share and per share amounts) |  | Three Months Ended March 31, |  |
|  | 2024 |  | 2023 |  |  |  |
Numerator: |  |  |  |  |  |  |  |
Net income attributable to BOK Financial Corp. shareholders |  | $ | 83,703 |  |  | $ | 162,368 |  |  |  |  |
Less: Earnings allocated to participating securities |  | 676 |  |  | 1,255 |  |  |  |  |
Numerator for basic earnings per share – income available to common shareholders |  | 83,027 |  |  | 161,113 |  |  |  |  |
Effect of reallocating undistributed earnings of participating securities |  | — |  |  | — |  |  |  |  |
Numerator for diluted earnings per share – income available to common shareholders |  | $ | 83,027 |  |  | $ | 161,113 |  |  |  |  |
Denominator: |  |  |  |  |  |  |  |
Weighted average shares outstanding |  | 64,812,555 |  |  | 66,849,288 |  |  |  |  |
Less: Participating securities included in weighted average shares outstanding |  | 522,450 |  |  | 517,513 |  |  |  |  |
Denominator for basic earnings per common share |  | 64,290,105 |  |  | 66,331,775 |  |  |  |  |
Dilutive effect of employee stock compensation plans |  | — |  |  | — |  |  |  |  |
Denominator for diluted earnings per common share |  | 64,290,105 |  |  | 66,331,775 |  |  |  |  |
Basic earnings per share |  | $ | 1.29 |  |  | $ | 2.43 |  |  |  |  |
Diluted earnings per share |  | $ | 1.29 |  |  | $ | 2.43 |  |  |  |  |

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(9) Reportable Segments
Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended March 31, 2024 is as follows (in thousands):

|  | Commercial |  | Consumer |  | Wealth Management |  | Funds Management and Other |  | BOK Financial Consolidated
Net interest revenue from external sources |  | $ | 282,447 |  |  | $ | 7,350 |  |  | $ | 6,999 |  |  | $ | (3,224) |  |  | $ | 293,572 |
Net interest revenue (expense) from internal sources |  | (37,326) |  |  | 94,799 |  |  | 33,110 |  |  | (90,583) |  |  | — |
Net interest revenue |  | 245,121 |  |  | 102,149 |  |  | 40,109 |  |  | (93,807) |  |  | 293,572 |
Net loans charged off and provision for credit losses |  | 4,160 |  |  | 1,808 |  |  | (15) |  |  | 2,047 |  |  | 8,000 |
Net interest revenue after provision for credit losses |  | 240,961 |  |  | 100,341 |  |  | 40,124 |  |  | (95,854) |  |  | 285,572 |
Other operating revenue |  | 50,006 |  |  | 36,207 |  |  | 118,704 |  |  | (43,216) |  |  | 161,701 |
Other operating expense |  | 70,095 |  |  | 53,447 |  |  | 99,535 |  |  | 117,307 |  |  | 340,384 |
Net direct contribution |  | 220,872 |  |  | 83,101 |  |  | 59,293 |  |  | (256,377) |  |  | 106,889 |
Gain (loss) on financial instruments, net |  | 167 |  |  | (9,663) |  |  | — |  |  | 9,496 |  |  | — |
Change in fair value of mortgage servicing rights |  | — |  |  | 10,977 |  |  | — |  |  | (10,977) |  |  | — |
Gain (loss) on repossessed assets, net |  | — |  |  | 107 |  |  | — |  |  | (107) |  |  | — |
Corporate expense allocations |  | 18,397 |  |  | 14,172 |  |  | 14,558 |  |  | (47,127) |  |  | — |
Net income before taxes |  | 202,642 |  |  | 70,350 |  |  | 44,735 |  |  | (210,838) |  |  | 106,889 |
Federal and state income taxes |  | 49,392 |  |  | 16,546 |  |  | 10,570 |  |  | (53,313) |  |  | 23,195 |
Net income |  | 153,250 |  |  | 53,804 |  |  | 34,165 |  |  | (157,525) |  |  | 83,694 |
Net income attributable to non-controlling interests |  | — |  |  | — |  |  | — |  |  | (9) |  |  | (9) |
Net income attributable to BOK Financial Corp. shareholders |  | $ | 153,250 |  |  | $ | 53,804 |  |  | $ | 34,165 |  |  | $ | (157,516) |  |  | $ | 83,703 |
Average assets |  | $ | 29,806,817 |  |  | $ | 9,391,981 |  |  | $ | 15,759,328 |  |  | $ | (4,930,554) |  |  | $ | 50,027,572 |

Reportable segments reconciliation to the Consolidated Financial Statements for the three months ended March 31, 2023 is as follows (in thousands):

|  | Commercial |  | Consumer |  | Wealth Management |  | Funds Management and Other |  | BOK Financial Consolidated
Net interest revenue from external sources |  | $ | 287,988 |  |  | $ | 21,146 |  |  | $ | 20,940 |  |  | $ | 22,274 |  |  | $ | 352,348 |
Net interest revenue (expense) from internal sources |  | (3,932) |  |  | 88,235 |  |  | 33,166 |  |  | (117,469) |  |  | — |
Net interest revenue |  | 284,056 |  |  | 109,381 |  |  | 54,106 |  |  | (95,195) |  |  | 352,348 |
Net loans charged off and provision for credit losses |  | 76 |  |  | 1,184 |  |  | (24) |  |  | 14,764 |  |  | 16,000 |
Net interest revenue after provision for credit losses |  | 283,980 |  |  | 108,197 |  |  | 54,130 |  |  | (109,959) |  |  | 336,348 |
Other operating revenue |  | 56,845 |  |  | 30,610 |  |  | 108,911 |  |  | (18,501) |  |  | 177,865 |
Other operating expense |  | 73,134 |  |  | 50,198 |  |  | 82,039 |  |  | 100,441 |  |  | 305,812 |
Net direct contribution |  | 267,691 |  |  | 88,609 |  |  | 81,002 |  |  | (228,901) |  |  | 208,401 |
Gain (loss) on financial instruments, net |  | (58) |  |  | (4,673) |  |  | — |  |  | 4,731 |  |  | — |
Change in fair value of mortgage servicing rights |  | — |  |  | (6,059) |  |  | — |  |  | 6,059 |  |  | — |
Gain (loss) on repossessed assets, net |  | 859 |  |  | 14 |  |  | — |  |  | (873) |  |  | — |
Corporate expense allocations |  | 17,718 |  |  | 11,622 |  |  | 12,360 |  |  | (41,700) |  |  | — |
Net income before taxes |  | 250,774 |  |  | 66,269 |  |  | 68,642 |  |  | (177,284) |  |  | 208,401 |
Federal and state income taxes |  | 60,543 |  |  | 15,586 |  |  | 16,195 |  |  | (46,419) |  |  | 45,905 |
Net income |  | 190,231 |  |  | 50,683 |  |  | 52,447 |  |  | (130,865) |  |  | 162,496 |
Net loss attributable to non-controlling interests |  | — |  |  | — |  |  | — |  |  | 128 |  |  | 128 |
Net income attributable to BOK Financial Corp. shareholders |  | $ | 190,231 |  |  | $ | 50,683 |  |  | $ | 52,447 |  |  | $ | (130,993) |  |  | $ | 162,368 |
Average assets |  | $ | 28,162,934 |  |  | $ | 9,934,511 |  |  | $ | 11,663,096 |  |  | $ | (3,778,073) |  |  | $ | 45,982,468 |

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(10) Fees and Commissions Revenue
Fees and commissions revenue is generated through the sales of products, consisting primarily of financial instruments, and the performance of services for customers under contractual obligations. Revenue from providing services for customers is recognized at the time services are provided in an amount that reflects the consideration we expect to be entitled to for those services. Revenue is recognized based on the application of five steps:
•Identify the contract with a customer
•Identify the performance obligations in the contract
•Determine the transaction price
•Allocate the transaction price to the performance obligations in the contract
•Recognize revenue when (or as) the Company satisfies a performance obligation
For contracts with multiple performance obligations, individual performance obligations are accounted for separately if the customer can benefit from the good or service on its own or with other resources readily available to the customer, and the promise to transfer goods and services to the customer is separately identifiable in the contract. The transaction price is allocated to the performance obligations based on relative standalone selling prices.
Revenue is recognized on a gross basis whenever we have primary responsibility and risk in providing the services or products to our customers and have discretion in establishing the price for the services or products. Revenue is recognized on a net basis whenever we act as an agent for products or services of others.
Brokerage and trading revenue includes revenues from trading, customer hedging, retail brokerage and investment banking. Trading revenue includes net realized and unrealized gains primarily related to sales of securities to institutional customers and related derivative contracts. Customer hedging revenue includes realized and unrealized changes in the fair value of derivative contracts held for customer risk management programs including credit valuation adjustments, as necessary. We offer commodity, interest rate, foreign exchange and equity derivatives to our customers. These customer contracts are offset with contracts with selected counterparties and exchanges to minimize changes in market risk from changes in commodity prices, interest rates or foreign exchange rates. Retail brokerage revenue represents fees and commissions earned on sales of fixed income securities, annuities, mutual funds and other financial instruments to retail customers. Investment banking revenue includes fees earned upon completion of underwriting and financial advisory services. Investment banking revenue also includes fees earned in conjunction with loan syndications. Insurance brokerage revenues represents fees and commissions earned on placement of insurance products with carriers for property and casualty and health coverage.
Transaction card revenue includes merchant discount fees and electronic funds transfer network fees, net of interchange fees paid to card issuers and assessments paid to card networks. Merchant discount fees represent fees paid by customers for account management and electronic processing of card transactions. Merchant discount fees are recognized at the time the customer's transactions are processed or other services are performed. The Company also maintains the TransFund electronic funds transfer network for the benefit of its members, which includes BOKF, NA. Electronic funds transfer fees are recognized as electronic transactions processed on behalf of its members.
Fiduciary and asset management revenue includes fees from asset management, custody, recordkeeping, investment advisory and administration services. Revenue is recognized on an accrual basis at the time the services are performed and may be based on either the fair value of the account or the service provided.
Deposit service charges and fees include commercial account service charges, overdraft fees, check card fee revenue and automated service charge and other deposit service fees. Fees are recognized at least quarterly in accordance with published deposit account agreements and disclosure statements for retail accounts or contractual agreements for commercial accounts. Item charges for overdraft or non-sufficient funds items are recognized as items are presented for payment. Account balance charges and activity fees are accrued monthly and collected in arrears. Commercial account activity fees may be offset by an earnings credit based on account balances. Check card fees represent interchange fees paid by a merchant bank for transactions processed from cards issued by the Company. Check card fees are recognized when transactions are processed.
Mortgage banking revenue includes revenues recognized in conjunction with the origination, marketing and servicing of conventional and government-sponsored residential mortgage loans. Mortgage production revenue includes net realized gains (losses) on sales of residential mortgage loans in the secondary market and the net change in unrealized gains (losses) on residential mortgage loans held for sale. Mortgage production revenue also includes changes in the fair value of derivative contracts not designated as hedging instruments related to residential mortgage loan commitments and forward sales contracts. Mortgage servicing revenue includes servicing fee income and late charges on loans serviced for others.
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Fees and commissions revenue by reportable segment and primary service line is as follows for the three months ended March 31, 2024 (in thousands):

| Commercial |  | Consumer |  | Wealth Management |  | Funds Management & Other |  | Consolidated |  | Out of Scope 1 |  | In Scope 2
Trading revenue | $ | — |  |  | $ | — |  |  | $ | 37,457 |  |  | $ | — |  |  | $ | 37,457 |  |  | $ | 37,457 |  |  | $ | — |
Customer hedging revenue | 3,743 |  |  | — |  |  | 2,020 |  |  | 562 |  |  | 6,325 |  |  | 6,325 |  |  | — |
Retail brokerage revenue | — |  |  | — |  |  | 4,693 |  |  | — |  |  | 4,693 |  |  | — |  |  | 4,693 |
Investment banking revenue | 3,819 |  |  | — |  |  | 6,885 |  |  | — |  |  | 10,704 |  |  | 3,094 |  |  | 7,610 |
Brokerage and trading revenue | 7,562 |  |  | — |  |  | 51,055 |  |  | 562 |  |  | 59,179 |  |  | 46,876 |  |  | 12,303 |
TransFund EFT network revenue | 20,466 |  |  | 826 |  |  | (18) |  |  | — |  |  | 21,274 |  |  | — |  |  | 21,274 |
Merchant services revenue | 2,180 |  |  | 9 |  |  | — |  |  | — |  |  | 2,189 |  |  | — |  |  | 2,189 |
Corporate card revenue | 1,738 |  |  | — |  |  | 179 |  |  | 113 |  |  | 2,030 |  |  | — |  |  | 2,030 |
Transaction card revenue | 24,384 |  |  | 835 |  |  | 161 |  |  | 113 |  |  | 25,493 |  |  | — |  |  | 25,493 |
Personal trust revenue | — |  |  | — |  |  | 24,345 |  |  | — |  |  | 24,345 |  |  | — |  |  | 24,345 |
Corporate trust revenue | — |  |  | — |  |  | 9,260 |  |  | — |  |  | 9,260 |  |  | — |  |  | 9,260 |
Institutional trust & retirement plan services revenue | — |  |  | — |  |  | 16,148 |  |  | — |  |  | 16,148 |  |  | — |  |  | 16,148 |
Investment management services and other revenue | — |  |  | — |  |  | 5,552 |  |  | — |  |  | 5,552 |  |  | — |  |  | 5,552 |
Fiduciary and asset management revenue | — |  |  | — |  |  | 55,305 |  |  | — |  |  | 55,305 |  |  | — |  |  | 55,305 |
Commercial account service charge revenue | 14,900 |  |  | 531 |  |  | 546 |  |  | — |  |  | 15,977 |  |  | — |  |  | 15,977 |
Overdraft fee revenue | 36 |  |  | 5,394 |  |  | 30 |  |  | — |  |  | 5,460 |  |  | — |  |  | 5,460 |
Check card revenue | — |  |  | 5,670 |  |  | — |  |  | — |  |  | 5,670 |  |  | — |  |  | 5,670 |
Automated service charge and other deposit fee revenue | 269 |  |  | 1,236 |  |  | 73 |  |  | — |  |  | 1,578 |  |  | — |  |  | 1,578 |
Deposit service charges and fees | 15,205 |  |  | 12,831 |  |  | 649 |  |  | — |  |  | 28,685 |  |  | — |  |  | 28,685 |
Mortgage production revenue | — |  |  | 3,525 |  |  | — |  |  | — |  |  | 3,525 |  |  | 3,525 |  |  | — |
Mortgage servicing revenue | — |  |  | 16,115 |  |  | — |  |  | (673) |  |  | 15,442 |  |  | 15,442 |  |  | — |
Mortgage banking revenue | — |  |  | 19,640 |  |  | — |  |  | (673) |  |  | 18,967 |  |  | 18,967 |  |  | — |
Other revenue | 3,479 |  |  | 2,901 |  |  | 11,534 |  |  | (4,979) |  |  | 12,935 |  |  | 7,912 |  |  | 5,023 |
Total fees and commissions revenue | $ | 50,630 |  |  | $ | 36,207 |  |  | $ | 118,704 |  |  | $ | (4,977) |  |  | $ | 200,564 |  |  | $ | 73,755 |  |  | $ | 126,809 |

1 Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.
2 In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

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Fees and commissions revenue by reportable segment and primary service line is as follows for the three months ended March 31, 2023 (in thousands):

| Commercial |  | Consumer |  | Wealth Management |  | Funds Management & Other |  | Consolidated |  | Out of Scope 1 |  | In Scope 2
Trading revenue | $ | — |  |  | $ | — |  |  | $ | 27,598 |  |  | $ | — |  |  | $ | 27,598 |  |  | $ | 27,598 |  |  | $ | — |
Customer hedging revenue | 6,487 |  |  | — |  |  | 100 |  |  | 1,767 |  |  | 8,354 |  |  | 8,354 |  |  | — |
Retail brokerage revenue | — |  |  | — |  |  | 3,844 |  |  | — |  |  | 3,844 |  |  | — |  |  | 3,844 |
Insurance brokerage revenue | — |  |  | — |  |  | 3,306 |  |  | — |  |  | 3,306 |  |  | — |  |  | 3,306 |
Investment banking revenue | 3,698 |  |  | — |  |  | 5,596 |  |  | — |  |  | 9,294 |  |  | 3,598 |  |  | 5,696 |
Brokerage and trading revenue | 10,185 |  |  | — |  |  | 40,444 |  |  | 1,767 |  |  | 52,396 |  |  | 39,550 |  |  | 12,846 |
TransFund EFT network revenue | 20,499 |  |  | 908 |  |  | (17) |  |  | 2 |  |  | 21,392 |  |  | — |  |  | 21,392 |
Merchant services revenue | 2,150 |  |  | 8 |  |  | — |  |  | — |  |  | 2,158 |  |  | — |  |  | 2,158 |
Corporate card revenue | 1,785 |  |  | — |  |  | 177 |  |  | 109 |  |  | 2,071 |  |  | — |  |  | 2,071 |
Transaction card revenue | 24,434 |  |  | 916 |  |  | 160 |  |  | 111 |  |  | 25,621 |  |  | — |  |  | 25,621 |
Personal trust revenue | — |  |  | — |  |  | 23,527 |  |  | — |  |  | 23,527 |  |  | — |  |  | 23,527 |
Corporate trust revenue | — |  |  | — |  |  | 7,660 |  |  | — |  |  | 7,660 |  |  | — |  |  | 7,660 |
Institutional trust & retirement plan services revenue | — |  |  | — |  |  | 13,253 |  |  | — |  |  | 13,253 |  |  | — |  |  | 13,253 |
Investment management services and other revenue | — |  |  | — |  |  | 6,238 |  |  | (21) |  |  | 6,217 |  |  | — |  |  | 6,217 |
Fiduciary and asset management revenue | — |  |  | — |  |  | 50,678 |  |  | (21) |  |  | 50,657 |  |  | — |  |  | 50,657 |
Commercial account service charge revenue | 12,871 |  |  | 499 |  |  | 477 |  |  | — |  |  | 13,847 |  |  | — |  |  | 13,847 |
Overdraft fee revenue | 25 |  |  | 4,828 |  |  | 20 |  |  | — |  |  | 4,873 |  |  | — |  |  | 4,873 |
Check card revenue | — |  |  | 5,638 |  |  | — |  |  | 1 |  |  | 5,639 |  |  | — |  |  | 5,639 |
Automated service charge and other deposit fee revenue | 237 |  |  | 1,313 |  |  | 59 |  |  | — |  |  | 1,609 |  |  | — |  |  | 1,609 |
Deposit service charges and fees | 13,133 |  |  | 12,278 |  |  | 556 |  |  | 1 |  |  | 25,968 |  |  | — |  |  | 25,968 |
Mortgage production revenue | — |  |  | (633) |  |  | — |  |  | — |  |  | (633) |  |  | (633) |  |  | — |
Mortgage servicing revenue | — |  |  | 15,558 |  |  | — |  |  | (558) |  |  | 15,000 |  |  | 15,000 |  |  | — |
Mortgage banking revenue | — |  |  | 14,925 |  |  | — |  |  | (558) |  |  | 14,367 |  |  | 14,367 |  |  | — |
Other revenue | 8,083 |  |  | 2,462 |  |  | 17,073 |  |  | (10,648) |  |  | 16,970 |  |  | 8,560 |  |  | 8,410 |
Total fees and commissions revenue | $ | 55,835 |  |  | $ | 30,581 |  |  | $ | 108,911 |  |  | $ | (9,348) |  |  | $ | 185,979 |  |  | $ | 62,477 |  |  | $ | 123,502 |

1 Out of scope revenue generally relates to financial instruments or contractual rights and obligations within the scope of other applicable accounting guidance.
2 In scope revenue represents revenue subject to FASB ASC Topic 606, Revenue from Contracts with Customers.

(11) Fair Value Measurements
Fair value is defined by applicable accounting guidance as the price to sell an asset or transfer a liability in an orderly transaction between market participants in the principal market for the given asset or liability at the measurement date based on market conditions at that date. An orderly transaction assumes exposure to the market for a customary period for marketing activities prior to the measurement date and not a forced liquidation or distressed sale. Certain assets and liabilities are recorded in the Company's financial statements at fair value. Some are recorded on a recurring basis and some on a non-recurring basis.
For some assets and liabilities, observable market transactions and market information might be available. For other assets and liabilities, observable market transactions and market information might not be available. A hierarchy for fair value has been established which categorizes into three levels the inputs to valuation techniques used to measure fair value. The three levels are as follows:
Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) - Fair value is based on unadjusted quoted prices in active markets for identical assets or liabilities.
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Significant Other Observable Inputs (Level 2) - Fair value is based on significant other observable inputs which are generally determined based on a single price for each financial instrument provided to us by an applicable third-party pricing service and is based on one or more of the following:
•Quoted prices for similar, but not identical, assets or liabilities in active markets;
•Quoted prices for identical or similar assets or liabilities in inactive markets;
•Inputs other than quoted prices that are observable, such as interest rate and yield curves, volatilities, prepayment speeds, loss severities, credit risks and default rates;
•Other inputs derived from or corroborated by observable market inputs.
Significant Unobservable Inputs (Level 3) - Fair value is based upon model-based valuation techniques for which at least one significant assumption is not observable in the market.
Transfers between levels are recognized as of the end of the reporting period. There were no transfers in or out of quoted prices in active markets for identical instruments to significant other observable inputs or significant unobservable inputs during the three months ended March 31, 2024 and 2023, respectively. Transfers between significant other observable inputs and significant unobservable inputs during the three months ended March 31, 2024 and 2023 were immaterial.
The underlying methods used by the third-party pricing services are considered in determining the primary inputs used to determine fair values. Management has evaluated the methodologies employed by the third-party pricing services by comparing the price provided by the pricing service with other sources, including brokers' quotes, sales or purchases of similar instruments and discounted cash flows to establish a basis for reliance on the pricing service values. Significant differences between the pricing service provided value and other sources are discussed with the pricing service to understand the basis for their values. Based on all observable inputs, management may adjust prices obtained from third-party pricing services to more appropriately reflect the prices that would be received to sell assets or paid to transfer liabilities in orderly transactions in the current market. No significant adjustments were made to prices provided by third-party pricing services at March 31, 2024 or December 31, 2023.
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Assets and Liabilities Measured at Fair Value on a Recurring Basis
The fair value of financial assets and liabilities measured on a recurring basis was as follows as of March 31, 2024 (in thousands):

|  | Total |  | Quoted Prices in Active Markets for Identical Instruments (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Assets: |  |  |  |  |  |  |  |
Trading securities: |  |  |  |  |  |  |  |
U.S. government securities |  | $ | 426,825 |  |  | $ | 370,062 |  |  | $ | 56,763 |  |  | $ | — |
Residential agency mortgage-backed securities |  | 4,898,485 |  |  | — |  |  | 4,898,485 |  |  | — |
Municipal securities |  | 67,120 |  |  | — |  |  | 67,120 |  |  | — |
Other trading securities |  | 48,608 |  |  | — |  |  | 48,608 |  |  | — |
Total trading securities |  | 5,441,038 |  |  | 370,062 |  |  | 5,070,976 |  |  | — |
Available for sale securities: |  |  |  |  |  |  |  |
U.S. Treasury |  | 920 |  |  | 920 |  |  | — |  |  | — |
Municipal securities |  | 304,826 |  |  | — |  |  | 304,826 |  |  | — |
Residential agency mortgage-backed securities |  | 7,816,688 |  |  | — |  |  | 7,816,688 |  |  | — |
Residential non-agency mortgage-backed securities |  | 846,805 |  |  | — |  |  | 846,805 |  |  | — |
Commercial agency mortgage-backed securities |  | 3,683,376 |  |  | — |  |  | 3,683,376 |  |  | — |
Other debt securities |  | 473 |  |  | — |  |  | — |  |  | 473 |
Total available for sale securities |  | 12,653,088 |  |  | 920 |  |  | 12,651,695 |  |  | 473 |
Fair value option securities — Residential agency mortgage-backed securities |  | 19,805 |  |  | — |  |  | 19,805 |  |  | — |
Residential mortgage loans held for sale 1 |  | 75,449 |  |  | — |  |  | 68,285 |  |  | 7,164 |
Mortgage servicing rights 2 |  | 319,330 |  |  | — |  |  | — |  |  | 319,330 |
Derivative contracts, net of cash collateral 3 |  | 263,493 |  |  | 10 |  |  | 263,483 |  |  | — |
Liabilities: |  |  |  |  |  |  |  |
Derivative contracts, net of cash collateral 3 |  | 438,605 |  |  | 649 |  |  | 437,956 |  |  | — |

1 Residential mortgage loans held for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards and are valued at 77.97% of the unpaid principal balance.
2 A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 5, Mortgage Banking Activities.
3 See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts in asset and liability positions that were valued based on quoted prices in active markets for identical instruments (Level 1) are primarily exchange-traded interest rate derivative contracts held for trading purposes.
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The fair value of financial assets and liabilities measured on a recurring basis was as follows as of December 31, 2023 (in thousands):

|  | Total |  | Quoted Prices in Active Markets for Identical Instruments (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Assets: |  |  |  |  |  |  |  |
Trading securities: |  |  |  |  |  |  |  |
U.S. government securities |  | $ | 10,959 |  |  | $ | 9,017 |  |  | $ | 1,942 |  |  | $ | — |
Residential agency mortgage-backed securities |  | 5,105,137 |  |  | — |  |  | 5,105,137 |  |  | — |
Municipal securities |  | 37,413 |  |  | — |  |  | 37,413 |  |  | — |
Other trading securities |  | 39,996 |  |  | — |  |  | 39,996 |  |  | — |
Total trading securities |  | 5,193,505 |  |  | 9,017 |  |  | 5,184,488 |  |  | — |
Available for sale securities: |  |  |  |  |  |  |  |
U.S. Treasury |  | 925 |  |  | 925 |  |  | — |  |  | — |
Municipal securities |  | 502,833 |  |  | — |  |  | 502,833 |  |  | — |
Residential agency mortgage-backed securities |  | 6,834,720 |  |  | — |  |  | 6,834,720 |  |  | — |
Residential non-agency mortgage-backed securities |  | 799,877 |  |  | — |  |  | 799,877 |  |  | — |
Commercial agency mortgage-backed securities |  | 4,147,853 |  |  | — |  |  | 4,147,853 |  |  | — |
Other debt securities |  | 473 |  |  | — |  |  | — |  |  | 473 |
Total available for sale securities |  | 12,286,681 |  |  | 925 |  |  | 12,285,283 |  |  | 473 |
Fair value option securities — Residential agency mortgage-backed securities |  | 20,671 |  |  | — |  |  | 20,671 |  |  | — |
Residential mortgage loans held for sale 1 |  | 56,935 |  |  | — |  |  | 49,749 |  |  | 7,186 |
Mortgage servicing rights 2 |  | 293,884 |  |  | — |  |  | — |  |  | 293,884 |
Derivative contracts, net of cash collateral 3 |  | 410,304 |  |  | — |  |  | 410,304 |  |  | — |
Liabilities: |  |  |  |  |  |  |  |
Derivative contracts, net of cash collateral 3 |  | 587,473 |  |  | 2,607 |  |  | 584,866 |  |  | — |

1 Residential mortgage loans held for sale measured at fair value on a recurring basis using significant unobservable inputs (Level 3) consist of residential mortgage loans intended for sale to U.S. government agencies that fail to meet conforming standards and are valued at 77.74% of the unpaid principal balance.
2 A reconciliation of the beginning and ending fair value of mortgage servicing rights and disclosures of significant assumptions used to determine fair value are presented in Note 5, Mortgage Banking Activities.
3 See Note 3 for detail of fair value of derivative contracts by contract type. Derivative contracts in asset and liability positions that were valued based on quoted prices in active markets for identical instruments (Level 1) are primarily exchange-traded interest rate derivative contracts held for trading purposes.
- 82 -

Following is a description of the Company's valuation methodologies used for assets and liabilities measured on a recurring basis:
Securities
The fair values of trading, available for sale and fair value option securities are based on quoted prices for identical instruments in active markets, when available. If quoted prices for identical instruments are not available, fair values are based on significant other observable inputs such as quoted prices of comparable instruments or interest rates and credit spreads, yield curves, volatilities, prepayment speeds and loss severities. The Company has elected to carry all residential mortgage-backed securities guaranteed by U.S. government agencies held as economic hedges against changes in the fair value of mortgage servicing rights at fair value with changes in the fair value recognized in earnings.
The fair value of certain available for sale municipal and other debt securities may be based on significant unobservable inputs. These significant unobservable inputs include limited observed trades, projected cash flows, current credit rating of the issuers and, when applicable, the insurers of the debt and observed trades of similar debt. Discount rates are primarily based on references to interest rate spreads on comparable securities of similar duration and credit rating as determined by the nationally-recognized rating agencies adjusted for a lack of trading volume. Significant unobservable inputs are developed by investment securities professionals involved in the active trading of similar securities. A summary of significant inputs used to value these securities follows. A management committee composed of senior members from the Company's Corporate Treasury, Risk Management and Finance departments assesses the appropriateness of these inputs quarterly.
Derivatives
All derivative instruments are carried on the balance sheet at fair value. Fair values for exchange-traded contracts are based on quoted prices. Fair values for over-the-counter interest rate, commodity and foreign exchange contracts are based on valuations provided either by third-party dealers in the contracts, quotes provided by independent pricing services, or a third-party provided pricing model that uses significant other observable market inputs.
Credit risk is considered in determining the fair value of derivative instruments. Management determines fair value adjustments based on various risk factors including, but not limited to, current fair value, probability of default and loss given default.
We also consider our own credit risk in determining the fair value of derivative contracts. Changes in our credit rating would affect the fair value of our derivative liabilities. In the event of a credit downgrade, the fair value of our derivative liabilities would increase.
Residential Mortgage Loans Held for Sale
Residential mortgage loans held for sale are carried on the balance sheet at fair value. The Company has elected to carry all residential mortgage loans originated for sale at fair value. Changes in the fair value of these financial instruments are recognized in earnings. The fair values of residential mortgage loans held for sale are based upon quoted market prices of such loans sold in securitization transactions, including related unfunded loan commitments and forward sales contracts. The fair value of mortgage loans that were unable to be sold to U.S. government agencies were determined using quoted prices of loans that are sold in securitization transactions with a liquidity discount applied.
- 83 -

Fair Value of Assets and Liabilities Measured on a Non-Recurring Basis
Assets measured at fair value on a non-recurring basis include collateral for certain nonaccruing loans and real property and other assets acquired to satisfy loans, which are based primarily on comparisons to completed sales of similar assets.
The following represents the carrying value of assets measured at fair value on a non-recurring basis (and related losses) during the period. The carrying value represents only those assets with a balance at March 31, 2024 for which the fair value was adjusted during the three months ended March 31, 2024 (in thousands):

|  |  |  |  |  |  | Fair Value Adjustments for the
| Carrying Value at March 31, 2024 |  | Three Months Ended Mar. 31, 2024 Recognized in: |  |
| Quoted Prices in Active Markets for Identical Instruments |  | Significant Other Observable Inputs |  | Significant Unobservable Inputs |  | Gross charge-offs against allowance for loan losses |  | Other gains (losses), net |  |  |  |
Nonaccruing loans | $ | — |  |  | $ | 67 |  |  | $ | 23,741 |  |  | $ | 4,935 |  |  | $ | — |  |  |  |  |

The following represents the carrying value of assets measured at fair value on a non-recurring basis (and related losses) during the period. The carrying value represents only those assets with a balance at March 31, 2023 for which the fair value was adjusted during the three months ended March 31, 2023 (in thousands):

|  |  |  |  |  |  | Fair Value Adjustments for the
| Carrying Value at March 31, 2023 |  | Three Months Ended Mar. 31, 2023 Recognized in: |  |
| Quoted Prices in Active Markets for Identical Instruments |  | Significant Other Observable Inputs |  | Significant Unobservable Inputs |  | Gross charge-offs against allowance for loan losses |  | Other gains (losses), net |  |  |  |
Nonaccruing loans | $ | — |  |  | $ | — |  |  | $ | 14,040 |  |  | $ | 1,991 |  |  | $ | — |  |  |  |  |
Real estate and other repossessed assets | — |  |  | 547 |  |  | — |  |  | — |  |  | (101) |  |  |  |  |

The fair value of collateral-dependent nonaccruing loans secured by real estate and real estate and other repossessed assets and the related fair value adjustments are generally based on unadjusted third-party appraisals. Our appraisal review policies require appraised values to be supported by observed inputs derived principally from or corroborated by observable market data. Appraisals that are not based on observable inputs or that require significant adjustments or fair value measurements that are not based on third-party appraisals are considered to be based on significant unobservable inputs. Non-recurring fair value measurements of collateral-dependent nonaccruing loans and real estate and other repossessed assets based on significant unobservable inputs are generally due to estimates of current fair values between appraisal dates. Significant unobservable inputs include listing prices for the same or comparable assets, uncorroborated expert opinions or management's knowledge of the collateral or industry. Non-recurring fair value measurements of collateral dependent loans secured by mineral rights are generally determined by our internal staff of engineers on projected cash flows under current market conditions and are based on significant unobservable inputs. Projected cash flows are discounted according to risk characteristics of the underlying oil and gas properties. Assets are evaluated to demonstrate with reasonable certainty that crude oil, natural gas and natural gas liquids can be recovered from known oil and gas reservoirs under existing economic and operating conditions at current prices with existing conventional equipment, operating methods and costs. Significant unobservable inputs are developed by asset management and workout professionals and approved by senior Credit Administration executives.
- 84 -

A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of March 31, 2024 follows (dollars in thousands):

|  | Fair Value |  | Valuation Technique(s) |  | Unobservable Input |  | Range (Weighted Average)
Nonaccruing loans |  | $ | 23,741 |  |  | Discounted cash flows |  | Management knowledge of industry and non-real estate collateral |  | 17% - 96% (83%)1

1 Represents fair value as a percentage of the unpaid principal balance.
A summary of quantitative information about Non-recurring Fair Value Measurements based on Significant Unobservable Inputs (Level 3) as of March 31, 2023 follows (dollars in thousands):

|  | Fair Value |  | Valuation Technique(s) |  | Unobservable Input |  | Range (Weighted Average)
Nonaccruing loans |  | $ | 14,040 |  |  | Discounted cash flows |  | Management knowledge of industry and non-real estate collateral including, but not limited to, recoverable oil and gas reserves, forward-looking commodity prices, estimated operating costs |  | 88% - 88% (88%)1

1 Represents fair value as a percentage of the unpaid principal balance.
- 85 -

Fair Value of Financial Instruments
The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or are measured at fair value on a non-recurring basis as of March 31, 2024 (in thousands):

|  | Carrying Value |  | Estimated Fair Value |  | Quoted Prices in Active Markets for Identical Instruments (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Cash and due from banks |  | $ | 801,677 |  |  | $ | 801,677 |  |  | $ | 801,677 |  |  | $ | — |  |  | $ | — |
Interest-bearing cash and cash equivalents |  | 354,070 |  |  | 354,070 |  |  | 354,070 |  |  | — |  |  | — |
Trading securities: |  |  |  |  |  |  |  |  |  |
U.S. government securities |  | 426,825 |  |  | 426,825 |  |  | 370,062 |  |  | 56,763 |  |  | — |
Residential agency mortgage-backed securities |  | 4,898,485 |  |  | 4,898,485 |  |  | — |  |  | 4,898,485 |  |  | — |
Municipal securities |  | 67,120 |  |  | 67,120 |  |  | — |  |  | 67,120 |  |  | — |
Other trading securities |  | 48,608 |  |  | 48,608 |  |  | — |  |  | 48,608 |  |  | — |
Total trading securities |  | 5,441,038 |  |  | 5,441,038 |  |  | 370,062 |  |  | 5,070,976 |  |  | — |
Investment securities: |  |  |  |  |  |  |  |  |  |
Municipal securities |  | 108,793 |  |  | 112,338 |  |  | — |  |  | 12,103 |  |  | 100,235 |
Residential agency mortgage-backed securities |  | 2,044,972 |  |  | 1,858,027 |  |  | — |  |  | 1,858,027 |  |  | — |
Commercial agency mortgage-backed securities |  | 15,990 |  |  | 14,987 |  |  | — |  |  | 14,987 |  |  | — |
Other debt securities |  | 16,288 |  |  | 14,713 |  |  | — |  |  | 14,713 |  |  | — |
Total investment securities |  | 2,186,043 |  |  | 2,000,065 |  |  | — |  |  | 1,899,830 |  |  | 100,235 |
Allowance for credit losses |  | (299) |  |  | — |  |  | — |  |  | — |  |  | — |
Investment securities, net of allowance |  | 2,185,744 |  |  | 2,000,065 |  |  | — |  |  | 1,899,830 |  |  | 100,235 |
Available for sale securities: |  |  |  |  |  |  |  |  |  |
U.S. Treasury |  | 920 |  |  | 920 |  |  | 920 |  |  | — |  |  | — |
Municipal securities |  | 304,826 |  |  | 304,826 |  |  | — |  |  | 304,826 |  |  | — |
Residential agency mortgage-backed securities |  | 7,816,688 |  |  | 7,816,688 |  |  | — |  |  | 7,816,688 |  |  | — |
Residential non-agency mortgage-backed securities |  | 846,805 |  |  | 846,805 |  |  | — |  |  | 846,805 |  |  | — |
Commercial agency mortgage-backed securities |  | 3,683,376 |  |  | 3,683,376 |  |  | — |  |  | 3,683,376 |  |  | — |
Other debt securities |  | 473 |  |  | 473 |  |  | — |  |  | — |  |  | 473 |
Total available for sale securities |  | 12,653,088 |  |  | 12,653,088 |  |  | 920 |  |  | 12,651,695 |  |  | 473 |
Fair value option securities — Residential agency mortgage-backed securities |  | 19,805 |  |  | 19,805 |  |  | — |  |  | 19,805 |  |  | — |
Residential mortgage loans held for sale |  | 75,449 |  |  | 75,449 |  |  | — |  |  | 68,285 |  |  | 7,164 |
Loans: |  |  |  |  |  |  |  |  |  |
Commercial |  | 15,132,867 |  |  | 15,055,904 |  |  | — |  |  | — |  |  | 15,055,904 |
Commercial real estate |  | 5,236,677 |  |  | 5,143,304 |  |  | — |  |  | — |  |  | 5,143,304 |
Loans to individuals |  | 3,803,016 |  |  | 3,675,612 |  |  | — |  |  | — |  |  | 3,675,612 |
Total loans |  | 24,172,560 |  |  | 23,874,820 |  |  | — |  |  | — |  |  | 23,874,820 |
Allowance for loan losses |  | (281,623) |  |  | — |  |  | — |  |  | — |  |  | — |
Loans, net of allowance |  | 23,890,937 |  |  | 23,874,820 |  |  | — |  |  | — |  |  | 23,874,820 |
Mortgage servicing rights |  | 319,330 |  |  | 319,330 |  |  | — |  |  | — |  |  | 319,330 |
Derivative instruments with positive fair value, net of cash collateral |  | 263,493 |  |  | 263,493 |  |  | 10 |  |  | 263,483 |  |  | — |
Deposits with no stated maturity |  | 32,016,638 |  |  | 32,016,638 |  |  | — |  |  | — |  |  | 32,016,638 |
Time deposits |  | 3,366,909 |  |  | 3,346,163 |  |  | — |  |  | — |  |  | 3,346,163 |
Other borrowed funds |  | 7,986,169 |  |  | 7,986,169 |  |  | — |  |  | — |  |  | 7,986,169 |
Subordinated debentures |  | 131,154 |  |  | 118,875 |  |  | — |  |  | 118,875 |  |  | — |
Derivative instruments with negative fair value, net of cash collateral |  | 438,605 |  |  | 438,605 |  |  | 649 |  |  | 437,956 |  |  | — |

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The following table presents the carrying values and estimated fair values of all financial instruments, including those financial assets and liabilities that are not measured and reported at fair value on a recurring basis or are measured at fair value on a non-recurring basis as of December 31, 2023 (in thousands):

|  | Carrying Value |  | Estimated Fair Value |  | Quoted Prices in Active Markets for Identical Instruments (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3)
Cash and due from banks |  | $ | 947,613 |  |  | $ | 947,613 |  |  | $ | 947,613 |  |  | $ | — |  |  | $ | — |
Interest-bearing cash and cash equivalents |  | 400,652 |  |  | 400,652 |  |  | 400,652 |  |  | — |  |  | — |
Trading securities: |  |  |  |  |  |  |  |  |  |
U.S. government securities |  | 10,959 |  |  | 10,959 |  |  | 9,017 |  |  | 1,942 |  |  | — |
Residential agency mortgage-backed securities |  | 5,105,137 |  |  | 5,105,137 |  |  | — |  |  | 5,105,137 |  |  | — |
Municipal securities |  | 37,413 |  |  | 37,413 |  |  | — |  |  | 37,413 |  |  | — |
Other trading securities |  | 39,996 |  |  | 39,996 |  |  | — |  |  | 39,996 |  |  | — |
Total trading securities |  | 5,193,505 |  |  | 5,193,505 |  |  | 9,017 |  |  | 5,184,488 |  |  | — |
Investment securities: |  |  |  |  |  |  |  |  |  |
Municipal securities |  | 120,705 |  |  | 125,525 |  |  | — |  |  | 12,305 |  |  | 113,220 |
Residential agency mortgage-backed securities |  | 2,092,083 |  |  | 1,917,810 |  |  | — |  |  | 1,917,810 |  |  | — |
Commercial agency mortgage-backed securities |  | 15,914 |  |  | 15,067 |  |  | — |  |  | 15,067 |  |  | — |
Other debt securities |  | 15,787 |  |  | 14,184 |  |  | — |  |  | 14,184 |  |  | — |
Total investment securities |  | 2,244,489 |  |  | 2,072,586 |  |  | — |  |  | 1,959,366 |  |  | 113,220 |
Allowance for credit losses |  | (336) |  |  | — |  |  | — |  |  | — |  |  | — |
Investment securities, net of allowance |  | 2,244,153 |  |  | 2,072,586 |  |  | — |  |  | 1,959,366 |  |  | 113,220 |
Available for sale securities: |  |  |  |  |  |  |  |  |  |
U.S. Treasury |  | 925 |  |  | 925 |  |  | 925 |  |  | — |  |  | — |
Municipal securities |  | 502,833 |  |  | 502,833 |  |  | — |  |  | 502,833 |  |  | — |
Residential agency mortgage-backed securities |  | 6,834,720 |  |  | 6,834,720 |  |  | — |  |  | 6,834,720 |  |  | — |
Residential non-agency mortgage-backed securities |  | 799,877 |  |  | 799,877 |  |  | — |  |  | 799,877 |  |  | — |
Commercial agency mortgage-backed securities |  | 4,147,853 |  |  | 4,147,853 |  |  | — |  |  | 4,147,853 |  |  | — |
Other debt securities |  | 473 |  |  | 473 |  |  | — |  |  | — |  |  | 473 |
Total available for sale securities |  | 12,286,681 |  |  | 12,286,681 |  |  | 925 |  |  | 12,285,283 |  |  | 473 |
Fair value option securities — Residential agency mortgage-backed securities |  | 20,671 |  |  | 20,671 |  |  | — |  |  | 20,671 |  |  | — |
Residential mortgage loans held for sale |  | 56,935 |  |  | 56,935 |  |  | — |  |  | 49,749 |  |  | 7,186 |
Loans: |  |  |  |  |  |  |  |  |  |
Commercial |  | 14,803,769 |  |  | 14,862,873 |  |  | — |  |  | — |  |  | 14,862,873 |
Commercial real estate |  | 5,337,647 |  |  | 5,270,657 |  |  | — |  |  | — |  |  | 5,270,657 |
Loans to individuals |  | 3,763,552 |  |  | 3,634,855 |  |  | — |  |  | — |  |  | 3,634,855 |
Total loans |  | 23,904,968 |  |  | 23,768,385 |  |  | — |  |  | — |  |  | 23,768,385 |
Allowance for loan losses |  | (277,123) |  |  | — |  |  | — |  |  | — |  |  | — |
Loans, net of allowance |  | 23,627,845 |  |  | 23,768,385 |  |  | — |  |  | — |  |  | 23,768,385 |
Mortgage servicing rights |  | 293,884 |  |  | 293,884 |  |  | — |  |  | — |  |  | 293,884 |
Derivative instruments with positive fair value, net of cash collateral |  | 410,304 |  |  | 410,304 |  |  | — |  |  | 410,304 |  |  | — |
Deposits with no stated maturity |  | 31,007,679 |  |  | 31,007,679 |  |  | — |  |  | — |  |  | 31,007,679 |
Time deposits |  | 3,012,022 |  |  | 2,993,685 |  |  | — |  |  | — |  |  | 2,993,685 |
Other borrowed funds |  | 8,824,300 |  |  | 8,824,299 |  |  | — |  |  | — |  |  | 8,824,299 |
Subordinated debentures |  | 131,150 |  |  | 115,798 |  |  | — |  |  | 115,798 |  |  | — |
Derivative instruments with negative fair value, net of cash collateral |  | 587,473 |  |  | 587,473 |  |  | 2,607 |  |  | 584,866 |  |  | — |

Because no market exists for certain of these financial instruments and management does not intend to sell these financial instruments, the fair values shown in the tables above may not represent values at which the respective financial instruments could be sold individually or in the aggregate at the given reporting date.
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(12) Subsequent Events
See Footnote 6, Commitments and Contingent Liabilities, regarding the Exchange Offer.
The Company evaluated events from the date of the consolidated financial statements on March 31, 2024 through the issuance of those consolidated financial statements included in this Quarterly Report on Form 10-Q. Except as noted above, no other events were identified requiring recognition in and/or disclosure in the consolidated financial statements.
- 88 -

Quarterly Financial Summary – Unaudited
Consolidated Daily Average Balances, Average Yields and Rates

(In thousands, except per share data) |  | Three Months Ended
|  | March 31, 2024 |  | December 31, 2023
|  | Average Balance |  | Revenue/ Expense |  | Yield/ Rate |  | Average Balance |  | Revenue/ Expense |  | Yield/ Rate
Assets |  |  |  |  |  |  |  |  |  |  |  |
Interest-bearing cash and cash equivalents |  | $ | 567,680 |  |  | $ | 7,005 |  |  | 4.96 | % |  | $ | 605,839 |  |  | $ | 8,096 |  |  | 5.30 | %
Trading securities |  | 5,371,209 |  |  | 68,300 |  |  | 5.12 | % |  | 5,448,403 |  |  | 69,013 |  |  | 5.05 | %
Investment securities, net of allowance |  | 2,210,040 |  |  | 7,854 |  |  | 1.42 | % |  | 2,264,194 |  |  | 8,058 |  |  | 1.42 | %
Available for sale securities |  | 12,537,981 |  |  | 113,593 |  |  | 3.48 | % |  | 12,063,398 |  |  | 105,556 |  |  | 3.27 | %
Fair value option securities |  | 20,080 |  |  | 195 |  |  | 3.59 | % |  | 20,086 |  |  | 199 |  |  | 3.57 | %
Restricted equity securities |  | 412,376 |  |  | 8,858 |  |  | 8.59 | % |  | 432,780 |  |  | 8,670 |  |  | 8.01 | %
Residential mortgage loans held for sale |  | 57,402 |  |  | 923 |  |  | 6.25 | % |  | 61,146 |  |  | 1,036 |  |  | 6.59 | %
Loans |  | 23,948,567 |  |  | 440,584 |  |  | 7.40 | % |  | 23,705,108 |  |  | 439,808 |  |  | 7.36 | %
Allowance for loan losses |  | (278,449) |  |  |  |  |  |  | (273,717) |  |  |  |  |
Loans, net of allowance |  | 23,670,118 |  |  | 440,584 |  |  | 7.48 | % |  | 23,431,391 |  |  | 439,808 |  |  | 7.45 | %
Total earning assets |  | 44,846,886 |  |  | 647,312 |  |  | 5.73 | % |  | 44,327,237 |  |  | 640,436 |  |  | 5.64 | %
Receivable on unsettled securities sales |  | 307,389 |  |  |  |  |  |  | 276,856 |  |  |  |  |
Cash and other assets |  | 4,873,297 |  |  |  |  |  |  | 5,109,577 |  |  |  |  |
Total assets |  | $ | 50,027,572 |  |  |  |  |  |  | $ | 49,713,670 |  |  |  |  |
Liabilities and equity |  |  |  |  |  |  |  |  |  |  |  |
Interest-bearing deposits: |  |  |  |  |  |  |  |  |  |  |  |
Transaction |  | $ | 22,264,259 |  |  | $ | 203,781 |  |  | 3.68 | % |  | $ | 20,449,370 |  |  | $ | 177,475 |  |  | 3.44 | %
Savings |  | 843,037 |  |  | 1,204 |  |  | 0.57 | % |  | 845,705 |  |  | 1,132 |  |  | 0.53 | %
Time |  | 3,287,179 |  |  | 37,139 |  |  | 4.54 | % |  | 3,002,252 |  |  | 31,242 |  |  | 4.13 | %
Total interest-bearing deposits |  | 26,394,475 |  |  | 242,124 |  |  | 3.69 | % |  | 24,297,327 |  |  | 209,849 |  |  | 3.43 | %
Funds purchased and repurchase agreements |  | 1,258,044 |  |  | 12,664 |  |  | 4.05 | % |  | 2,476,973 |  |  | 29,915 |  |  | 4.79 | %
Other borrowings |  | 6,844,633 |  |  | 94,540 |  |  | 5.56 | % |  | 7,120,963 |  |  | 99,542 |  |  | 5.55 | %
Subordinated debentures |  | 131,154 |  |  | 2,312 |  |  | 7.09 | % |  | 131,151 |  |  | 2,343 |  |  | 7.09 | %
Total interest-bearing liabilities |  | 34,628,306 |  |  | 351,640 |  |  | 4.08 | % |  | 34,026,414 |  |  | 341,649 |  |  | 3.98 | %
Non-interest bearing demand deposits |  | 8,631,416 |  |  |  |  |  |  | 9,378,886 |  |  |  |  |
Due on unsettled securities purchases |  | 499,936 |  |  |  |  |  |  | 363,358 |  |  |  |  |
Other liabilities |  | 1,112,947 |  |  |  |  |  |  | 1,008,035 |  |  |  |  |
Total equity |  | 5,154,967 |  |  |  |  |  |  | 4,936,977 |  |  |  |  |
Total liabilities and equity |  | $ | 50,027,572 |  |  |  |  |  |  | $ | 49,713,670 |  |  |  |  |
Tax-equivalent Net Interest Revenue |  |  |  | $ | 295,672 |  |  | 1.65 | % |  |  |  | $ | 298,787 |  |  | 1.66 | %
Tax-equivalent Net Interest Revenue to Earning Assets |  |  |  |  |  | 2.61 | % |  |  |  |  |  | 2.64 | %
Less tax-equivalent adjustment |  |  |  | 2,100 |  |  |  |  |  |  | 2,112 |  |  |
Net Interest Revenue |  |  |  | 293,572 |  |  |  |  |  |  | 296,675 |  |  |
Provision for credit losses |  |  |  | 8,000 |  |  |  |  |  |  | 6,000 |  |  |
Other operating revenue |  |  |  | 161,701 |  |  |  |  |  |  | 204,883 |  |  |
Other operating expense |  |  |  | 340,384 |  |  |  |  |  |  | 384,083 |  |  |
Income before taxes |  |  |  | 106,889 |  |  |  |  |  |  | 111,475 |  |  |
Federal and state income taxes |  |  |  | 23,195 |  |  |  |  |  |  | 28,953 |  |  |
Net income |  |  |  | 83,694 |  |  |  |  |  |  | 82,522 |  |  |
Net income (loss) attributable to non-controlling interests |  |  |  | (9) |  |  |  |  |  |  | (53) |  |  |
Net income attributable to BOK Financial Corp. shareholders |  |  |  | $ | 83,703 |  |  |  |  |  |  | $ | 82,575 |  |  |
Earnings Per Average Common Share Equivalent: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  | $ | 1.29 |  |  |  |  |  |  | $ | 1.26 |  |  |
Diluted |  |  |  | $ | 1.29 |  |  |  |  |  |  | $ | 1.26 |  |  |

Yield calculations are shown on a tax equivalent at the statutory federal and state rates for the periods presented. The yield calculations exclude security trades that have been recorded on trade date with no corresponding interest income and the unrealized gains and losses. The yield calculation also includes average loan balances for which the accrual of interest has been discontinued and are net of unearned income. Yield / rate calculations are generally based on the conventions that determine how interest income and expense is accrued.
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(In thousands, except per share data) |  | Three Months Ended
|  | September 30, 2023 |  | June 30, 2023
|  | Average Balance |  | Revenue /Expense |  | Yield / Rate |  | Average Balance |  | Revenue / Expense |  | Yield / Rate
Assets |  |  |  |  |  |  |  |  |  |  |  |
Interest-bearing cash and cash equivalents |  | $ | 598,734 |  |  | $ | 8,199 |  |  | 5.43 | % |  | $ | 708,475 |  |  | $ | 9,552 |  |  | 5.41 | %
Trading securities |  | 5,444,587 |  |  | 65,301 |  |  | 4.76 | % |  | 4,274,803 |  |  | 47,882 |  |  | 4.50 | %
Investment securities, net of allowance |  | 2,331,595 |  |  | 8,309 |  |  | 1.43 | % |  | 2,408,122 |  |  | 8,659 |  |  | 1.44 | %
Available for sale securities |  | 11,925,800 |  |  | 99,238 |  |  | 3.11 | % |  | 12,033,597 |  |  | 94,849 |  |  | 3.00 | %
Fair value option securities |  | 41,741 |  |  | 552 |  |  | 4.61 | % |  | 245,469 |  |  | 3,116 |  |  | 5.07 | %
Restricted equity securities |  | 445,532 |  |  | 8,776 |  |  | 7.88 | % |  | 351,944 |  |  | 6,429 |  |  | 7.31 | %
Residential mortgage loans held for sale |  | 77,208 |  |  | 1,234 |  |  | 6.27 | % |  | 72,959 |  |  | 1,092 |  |  | 5.85 | %
Loans |  | 23,414,308 |  |  | 427,649 |  |  | 7.25 | % |  | 22,889,054 |  |  | 400,988 |  |  | 7.03 | %
Allowance for loan losses |  | (267,205) |  |  |  |  |  |  | (252,890) |  |  |  |  |
Loans, net of allowance |  | 23,147,103 |  |  | 427,649 |  |  | 7.33 | % |  | 22,636,164 |  |  | 400,988 |  |  | 7.10 | %
Total earning assets |  | 44,012,300 |  |  | 619,258 |  |  | 5.49 | % |  | 42,731,533 |  |  | 572,567 |  |  | 5.29 | %
Receivable on unsettled securities sales |  | 268,344 |  |  |  |  |  |  | 163,903 |  |  |  |  |
Cash and other assets |  | 5,038,908 |  |  |  |  |  |  | 5,012,671 |  |  |  |  |
Total assets |  | $ | 49,319,552 |  |  |  |  |  |  | $ | 47,908,107 |  |  |  |  |
Liabilities and equity |  |  |  |  |  |  |  |  |  |  |  |
Interest-bearing deposits: |  |  |  |  |  |  |  |  |  |  |  |
Transaction |  | $ | 19,415,599 |  |  | $ | 155,385 |  |  | 3.18 | % |  | $ | 18,368,592 |  |  | $ | 119,272 |  |  | 2.60 | %
Savings |  | 874,530 |  |  | 1,043 |  |  | 0.47 | % |  | 926,882 |  |  | 490 |  |  | 0.21 | %
Time |  | 2,839,947 |  |  | 28,380 |  |  | 3.96 | % |  | 2,076,037 |  |  | 16,904 |  |  | 3.27 | %
Total interest-bearing deposits |  | 23,130,076 |  |  | 184,808 |  |  | 3.17 | % |  | 21,371,511 |  |  | 136,666 |  |  | 2.56 | %
Funds purchased and repurchase agreements |  | 2,699,027 |  |  | 32,748 |  |  | 4.81 | % |  | 3,670,994 |  |  | 41,905 |  |  | 4.58 | %
Other borrowings |  | 6,968,309 |  |  | 96,271 |  |  | 5.48 | % |  | 5,275,291 |  |  | 67,316 |  |  | 5.12 | %
Subordinated debentures |  | 131,151 |  |  | 2,321 |  |  | 7.02 | % |  | 131,153 |  |  | 2,219 |  |  | 6.79 | %
Total interest-bearing liabilities |  | 32,928,563 |  |  | 316,148 |  |  | 3.81 | % |  | 30,448,949 |  |  | 248,106 |  |  | 3.27 | %
Non-interest bearing demand deposits |  | 10,157,821 |  |  |  |  |  |  | 10,998,201 |  |  |  |  |
Due on unsettled securities purchases |  | 435,927 |  |  |  |  |  |  | 436,353 |  |  |  |  |
Other liabilities |  | 891,675 |  |  |  |  |  |  | 1,079,692 |  |  |  |  |
Total equity |  | 4,905,566 |  |  |  |  |  |  | 4,944,912 |  |  |  |  |
Total liabilities and equity |  | $ | 49,319,552 |  |  |  |  |  |  | $ | 47,908,107 |  |  |  |  |
Tax-equivalent Net Interest Revenue |  |  |  | $ | 303,110 |  |  | 1.68 | % |  |  |  | $ | 324,461 |  |  | 2.02 | %
Tax-equivalent Net Interest Revenue to Earning Assets |  |  |  |  |  | 2.69 | % |  |  |  |  |  | 3.00 | %
Less tax-equivalent adjustment |  |  |  | 2,214 |  |  |  |  |  |  | 2,200 |  |  |
Net Interest Revenue |  |  |  | 300,896 |  |  |  |  |  |  | 322,261 |  |  |
Provision for credit losses |  |  |  | 7,000 |  |  |  |  |  |  | 17,000 |  |  |
Other operating revenue |  |  |  | 198,152 |  |  |  |  |  |  | 209,049 |  |  |
Other operating expense |  |  |  | 324,313 |  |  |  |  |  |  | 318,673 |  |  |
Income before taxes |  |  |  | 167,735 |  |  |  |  |  |  | 195,637 |  |  |
Federal and state income taxes |  |  |  | 33,256 |  |  |  |  |  |  | 44,001 |  |  |
Net income |  |  |  | 134,479 |  |  |  |  |  |  | 151,636 |  |  |
Net income (loss) attributable to non-controlling interests |  |  |  | (16) |  |  |  |  |  |  | 328 |  |  |
Net income attributable to BOK Financial Corp. shareholders |  |  |  | $ | 134,495 |  |  |  |  |  |  | $ | 151,308 |  |  |
Earnings Per Average Common Share Equivalent: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  |  |  | $ | 2.04 |  |  |  |  |  |  | $ | 2.27 |  |  |
Diluted |  |  |  | $ | 2.04 |  |  |  |  |  |  | $ | 2.27 |  |  |

Yield calculations are shown on a tax equivalent at the statutory federal and state rates for the periods presented. The yield calculations exclude security trades that have been recorded on trade date with no corresponding interest income and the unrealized gains and losses. The yield calculation also includes average loan balances for which the accrual of interest has been discontinued and are net of unearned income. Yield / rate calculations are generally based on the conventions that determine how interest income and expense is accrued.
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(In thousands, except per share data) |  | Three Months Ended
|  | March 31, 2023
|  | Average Balance |  | Revenue / Expense |  | Yield / Rate
Assets |  |  |  |  |  |
Interest-bearing cash and cash equivalents |  | $ | 616,596 |  |  | $ | 6,506 |  |  | 4.28 | %
Trading securities |  | 3,031,969 |  |  | 34,073 |  |  | 4.52 | %
Investment securities, net of allowance |  | 2,473,796 |  |  | 9,017 |  |  | 1.46 | %
Available for sale securities |  | 11,738,693 |  |  | 89,112 |  |  | 2.87 | %
Fair value option securities |  | 300,372 |  |  | 3,893 |  |  | 5.17 | %
Restricted equity securities |  | 316,724 |  |  | 5,808 |  |  | 7.34 | %
Residential mortgage loans held for sale |  | 65,769 |  |  | 979 |  |  | 5.79 | %
Loans |  | 22,476,247 |  |  | 369,626 |  |  | 6.67 | %
Allowance for loan losses |  | (238,909) |  |  |  |  |
Loans, net of allowance |  | 22,237,338 |  |  | 369,626 |  |  | 6.74 | %
Total earning assets |  | 40,781,257 |  |  | 519,014 |  |  | 5.06 | %
Receivable on unsettled securities sales |  | 177,312 |  |  |  |  |
Cash and other assets |  | 5,023,899 |  |  |  |  |
Total assets |  | $ | 45,982,468 |  |  |  |  |
Liabilities and equity |  |  |  |  |  |
Interest-bearing deposits: |  |  |  |  |  |
Transaction |  | $ | 18,639,900 |  |  | $ | 87,936 |  |  | 1.91 | %
Savings |  | 958,443 |  |  | 248 |  |  | 0.10 | %
Time |  | 1,477,720 |  |  | 7,090 |  |  | 1.95 | %
Total interest-bearing deposits |  | 21,076,063 |  |  | 95,274 |  |  | 1.83 | %
Funds purchased and repurchase agreements |  | 1,759,237 |  |  | 14,450 |  |  | 3.33 | %
Other borrowings |  | 4,512,280 |  |  | 52,588 |  |  | 4.73 | %
Subordinated debentures |  | 131,166 |  |  | 2,069 |  |  | 6.40 | %
Total interest-bearing liabilities |  | 27,478,746 |  |  | 164,381 |  |  | 2.43 | %
Non-interest bearing demand deposits |  | 12,406,408 |  |  |  |  |
Due on unsettled securities purchases |  | 316,738 |  |  |  |  |
Other liabilities |  | 939,553 |  |  |  |  |
Total equity |  | 4,841,023 |  |  |  |  |
Total liabilities and equity |  | $ | 45,982,468 |  |  |  |  |
Tax-equivalent Net Interest Revenue |  |  |  | $ | 354,633 |  |  | 2.63 | %
Tax-equivalent Net Interest Revenue to Earning Assets |  |  |  |  |  | 3.45 | %
Less tax-equivalent adjustment |  |  |  | 2,285 |  |  |
Net Interest Revenue |  |  |  | 352,348 |  |  |
Provision for credit losses |  |  |  | 16,000 |  |  |
Other operating revenue |  |  |  | 177,865 |  |  |
Other operating expense |  |  |  | 305,812 |  |  |
Income before taxes |  |  |  | 208,401 |  |  |
Federal and state income taxes |  |  |  | 45,905 |  |  |
Net income |  |  |  | 162,496 |  |  |
Net income attributable to non-controlling interests |  |  |  | 128 |  |  |
Net income attributable to BOK Financial Corp. shareholders |  |  |  | $ | 162,368 |  |  |
Earnings Per Average Common Share Equivalent: |  |  |  |  |  |
Basic |  |  |  | $ | 2.43 |  |  |
Diluted |  |  |  | $ | 2.43 |  |  |

Yield calculations are shown on a tax equivalent at the statutory federal and state rates for the periods presented. The yield calculations exclude security trades that have been recorded on trade date with no corresponding interest income and the unrealized gains and losses. The yield calculation also includes average loan balances for which the accrual of interest has been discontinued and are net of unearned income. Yield / rate calculations are generally based on the conventions that determine how interest income and expense is accrued.
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Quarterly Earnings Trends – Unaudited
(In thousands, except share and per share data)

|  | Three Months Ended
|  | Mar. 31, 2024 |  | Dec. 31, 2023 |  | Sep. 30, 2023 |  | June 30, 2023 |  | Mar. 31, 2023
Interest revenue |  | $ | 645,212 |  |  | $ | 638,324 |  |  | $ | 617,044 |  |  | $ | 570,367 |  |  | $ | 516,729 |
Interest expense |  | 351,640 |  |  | 341,649 |  |  | 316,148 |  |  | 248,106 |  |  | 164,381 |
Net interest revenue |  | 293,572 |  |  | 296,675 |  |  | 300,896 |  |  | 322,261 |  |  | 352,348 |
Provision for credit losses |  | 8,000 |  |  | 6,000 |  |  | 7,000 |  |  | 17,000 |  |  | 16,000 |
Net interest revenue after provision for credit losses |  | 285,572 |  |  | 290,675 |  |  | 293,896 |  |  | 305,261 |  |  | 336,348 |
Other operating revenue |  |  |  |  |  |  |  |  |  |
Brokerage and trading revenue |  | 59,179 |  |  | 60,896 |  |  | 62,312 |  |  | 65,006 |  |  | 52,396 |
Transaction card revenue |  | 25,493 |  |  | 28,847 |  |  | 26,387 |  |  | 26,003 |  |  | 25,621 |
Fiduciary and asset management revenue |  | 55,305 |  |  | 51,408 |  |  | 52,256 |  |  | 52,997 |  |  | 50,657 |
Deposit service charges and fees |  | 28,685 |  |  | 27,770 |  |  | 27,676 |  |  | 27,100 |  |  | 25,968 |
Mortgage banking revenue |  | 18,967 |  |  | 12,834 |  |  | 13,356 |  |  | 15,141 |  |  | 14,367 |
Other revenue |  | 12,935 |  |  | 15,035 |  |  | 15,865 |  |  | 14,250 |  |  | 16,970 |
Total fees and commissions |  | 200,564 |  |  | 196,790 |  |  | 197,852 |  |  | 200,497 |  |  | 185,979 |
Other gains, net |  | 4,269 |  |  | 40,452 |  |  | 1,474 |  |  | 12,618 |  |  | 2,251 |
Gain (loss) on derivatives, net |  | (8,633) |  |  | 8,592 |  |  | (9,010) |  |  | (8,159) |  |  | (1,344) |
Gain (loss) on fair value option securities, net |  | (305) |  |  | 1,031 |  |  | (203) |  |  | (2,158) |  |  | (2,962) |
Change in fair value of mortgage servicing rights |  | 10,977 |  |  | (14,356) |  |  | 8,039 |  |  | 9,261 |  |  | (6,059) |
Loss on available for sale securities, net |  | (45,171) |  |  | (27,626) |  |  | — |  |  | (3,010) |  |  | — |
Total other operating revenue |  | 161,701 |  |  | 204,883 |  |  | 198,152 |  |  | 209,049 |  |  | 177,865 |
Other operating expense |  |  |  |  |  |  |  |  |  |
Personnel |  | 202,653 |  |  | 203,022 |  |  | 190,791 |  |  | 190,652 |  |  | 182,145 |
Business promotion |  | 7,978 |  |  | 8,629 |  |  | 6,958 |  |  | 7,640 |  |  | 8,569 |
Charitable contributions to BOKF Foundation |  | — |  |  | 1,542 |  |  | 23 |  |  | 1,142 |  |  | — |
Professional fees and services |  | 12,010 |  |  | 16,288 |  |  | 13,224 |  |  | 12,777 |  |  | 13,048 |
Net occupancy and equipment |  | 30,293 |  |  | 30,355 |  |  | 32,583 |  |  | 30,105 |  |  | 28,459 |
FDIC and other insurance |  | 8,740 |  |  | 8,495 |  |  | 7,996 |  |  | 6,974 |  |  | 7,315 |
FDIC special assessment |  | 6,454 |  |  | 43,773 |  |  | — |  |  | — |  |  | — |
Data processing and communications |  | 45,564 |  |  | 45,584 |  |  | 45,672 |  |  | 45,307 |  |  | 44,802 |
Printing, postage and supplies |  | 3,997 |  |  | 3,844 |  |  | 3,760 |  |  | 3,728 |  |  | 3,893 |
Amortization of intangible assets |  | 3,003 |  |  | 3,543 |  |  | 3,474 |  |  | 3,474 |  |  | 3,391 |
Mortgage banking costs |  | 6,355 |  |  | 8,085 |  |  | 8,357 |  |  | 8,300 |  |  | 5,782 |
Other expense |  | 13,337 |  |  | 10,923 |  |  | 11,475 |  |  | 8,574 |  |  | 8,408 |
Total other operating expense |  | 340,384 |  |  | 384,083 |  |  | 324,313 |  |  | 318,673 |  |  | 305,812 |
Net income before taxes |  | 106,889 |  |  | 111,475 |  |  | 167,735 |  |  | 195,637 |  |  | 208,401 |
Federal and state income taxes |  | 23,195 |  |  | 28,953 |  |  | 33,256 |  |  | 44,001 |  |  | 45,905 |
Net income |  | 83,694 |  |  | 82,522 |  |  | 134,479 |  |  | 151,636 |  |  | 162,496 |
Net income (loss) attributable to non-controlling interests |  | (9) |  |  | (53) |  |  | (16) |  |  | 328 |  |  | 128 |
Net income attributable to BOK Financial Corporation shareholders |  | $ | 83,703 |  |  | $ | 82,575 |  |  | $ | 134,495 |  |  | $ | 151,308 |  |  | $ | 162,368 |
Earnings per share: |  |  |  |  |  |  |  |  |  |
Basic |  | $1.29 |  | $1.26 |  | $2.04 |  | $2.27 |  | $2.43
Diluted |  | $1.29 |  | $1.26 |  | $2.04 |  | $2.27 |  | $2.43
Average shares used in computation: |  |  |  |  |  |  |  |  |  |
Basic |  | 64,290,105 |  |  | 64,750,171 |  |  | 65,548,307 |  |  | 65,994,132 |  |  | 66,331,775 |
Diluted |  | 64,290,105 |  |  | 64,750,171 |  |  | 65,548,307 |  |  | 65,994,132 |  |  | 66,331,775 |

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PART II. Other Information
Item 1. Legal Proceedings
See discussion of legal proceedings at Note 6 to the Consolidated Financial Statements.
Item 1A. Risk Factors
There are no material changes from the risk factors set forth under Part I, Item 1A. "Risk Factors" in the Company's Annual Report on Form 10-K for the year ended December 31, 2023.
Item 2. Unregistered Sales of Equity Securities and Use of Proceeds
The following table provides information with respect to purchases made by or on behalf of the Company or any "affiliated purchaser" (as defined in Rule 10b-18(a)(3) under the Securities Exchange Act of 1934), of the Company's common stock during the three months ended March 31, 2024.

Period |  | Total Number of Shares Purchased 2 |  | Average Price Paid per Share |  | Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs 1 |  | Maximum Number of Shares that May Yet Be Purchased Under the Plans
January 1 to January 31, 2024 |  | 79,534 |  |  | $ | 88.22 |  |  | 44,630 |  |  | 2,527,156 |
February 1 to February 29, 2024 |  | 425,000 |  |  | $ | 82.73 |  |  | 425,000 |  |  | 2,102,156 |
March 1 to March 31, 2024 |  | 147,316 |  |  | $ | 86.50 |  |  | 147,000 |  |  | 1,955,156 |
Total |  | 651,850 |  |  |  |  | 616,630 |  |  |

1 On November 1, 2022, the Company's board of directors authorized the Company to repurchase up to five million shares of the Company's common stock. As of March 31, 2024, the Company had repurchased 3,044,844 shares under this plan. Future repurchases of the Company's common stock will vary based on market conditions, regulatory limitations and other factors.
2 The Company may repurchase mature shares from employees to cover the exercise price and taxes in connection with employee equity compensation.
Item 5. Other Information
Trading Plans
No Company director or officer (as defined in Exchange Act Rule 16a-1(f)) has adopted, modified or terminated any trading arrangements during the first quarter of 2024.
Certain of our officers or directors have made elections to participate in, and are participating in, our dividend reinvestment plan and 401(k) plan, and have made, and may from time to time make, elections to have shares withheld to cover withholding taxes on issuances of shares to such officers or directors, which may be designed to satisfy the affirmative defense conditions of Rule 10b5-1 under the Exchange Act or may constitute non-Rule 10b5-1 trading arrangements (as defined in Item 408(c) of Regulation S-K).
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Item 6. Exhibits

31.1 | Certification of Chief Executive Officer Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002
31.2 | Certification of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
32 | Certification of Chief Executive Officer and Chief Financial Officer Pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
101 | Interactive data files pursuant to Rule 405 of Regulation S-T: (i) the Consolidated Balance Sheets, (ii) the Consolidated Statements of Earnings, (iii) the Consolidated Statements of Changes in Equity, (iv) the Consolidated Statement of Cash Flows and (v) the Notes to Consolidated Financial Statements. The XBRL instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.
104 | Cover Page Interactive Data File - (formatted as Inline XBRL and contained in Exhibit 101)

Items 3 and 4 are not applicable and have been omitted.
- 94 -

Signatures
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.
BOK FINANCIAL CORPORATION
(Registrant)
Date: May 1, 2024

/s/ Martin E. Grunst
Martin E. Grunst
Executive Vice President and
Chief Financial Officer

/s/ Michael J. Rogers
Michael J. Rogers
Senior Vice President and
Chief Accounting Officer

- 95 -