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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 10-Q

☒ | 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. 0-19731

GILEAD SCIENCES, INC.
(Exact Name of Registrant as Specified in Its Charter)

Delaware | 94-3047598
(State or Other Jurisdiction of Incorporation or Organization) | (IRS Employer Identification No.)

333 Lakeside Drive, Foster City, California 94404
(Address of principal executive offices) (Zip Code)
650-574-3000
(Registrant’s Telephone Number, Including Area Code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class |  | Trading Symbol(s) |  | Name of each exchange on which registered
Common Stock, par value, $0.001 per share |  | GILD |  | The Nasdaq Global Select 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 x 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 such files). Yes x No ¨
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, 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 x 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 Exchange Act).
Yes ☐ No x
Number of shares outstanding of the issuer’s common stock, par value $0.001 per share, as of April 30, 2024: 1,245,853,209

GILEAD SCIENCES, INC.
INDEX

PART I. | FINANCIAL INFORMATION |  | 3
| Item 1. | Condensed Consolidated Financial Statements |  | 3
|  | Condensed Consolidated Balance Sheets as of March 31, 2024 and December 31, 2023 |  | 3
|  | Condensed Consolidated Statements of Operations for the Three Months Ended March 31, 2024 and 2023 |  | 4
|  | Condensed Consolidated Statements of Comprehensive (Loss) Income for the Three Months Ended March 31, 2024 and 2023 |  | 5
|  | Condensed Consolidated Statements of Stockholders’ Equity for the Three Months Ended March 31, 2024 and 2023 |  | 6
|  | Condensed Consolidated Statements of Cash Flows for the Three Months Ended March 31, 2024 and 2023 |  | 7
|  | Notes to Condensed Consolidated Financial Statements |  | 8
| Item 2. | Management’s Discussion and Analysis of Financial Condition and Results of Operations |  | 25
| Item 3. | Quantitative and Qualitative Disclosures About Market Risk |  | 31
| Item 4. | Controls and Procedures |  | 31
PART II. | OTHER INFORMATION |  | 32
| Item 1. | Legal Proceedings |  | 32
| Item 1A. | Risk Factors |  | 32
| Item 2. | Unregistered Sales of Equity Securities and Use of Proceeds |  | 47
| Item 3. | Defaults Upon Senior Securities |  | 47
| Item 4. | Mine Safety Disclosures |  | 47
| Item 5. | Other Information |  | 47
| Item 6. | Exhibits |  | 47
SIGNATURES |  | 52

We own or have rights to various trademarks, copyrights and trade names used in our business, including the following: GILEAD®, GILEAD SCIENCES®, KITE™, AMBISOME®, ATRIPLA®, BIKTARVY®, CAYSTON®, COMPLERA®, DESCOVY®, DESCOVY FOR PREP®, EMTRIVA®, EPCLUSA®, EVIPLERA®, GENVOYA®, HARVONI®, HEPCLUDEX®, HEPSERA®, JYSELECA®, LETAIRIS®, ODEFSEY®, SOVALDI®, STRIBILD®, SUNLENCA®, TECARTUS®, TRODELVY®, TRUVADA®, TRUVADA FOR PREP®, TYBOST®, VEKLURY®, VEMLIDY®, VIREAD®, VOSEVI®, YESCARTA® and ZYDELIG®. Other trademarks and trade names are the property of their respective owners.
Certain amounts and percentages in this Quarterly Report on Form 10-Q may not sum or recalculate due to rounding.

This Quarterly Report on Form 10-Q, including Part I, Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations and Part II, Item 1A. Risk Factors, contains forward-looking statements regarding future events and our future results that are subject to the safe harbors created under the Securities Act of 1933, as amended, and the Securities Exchange Act of 1934, as amended. Words such as “anticipate,” “believe,” “continue,” “could,” “estimate,” “expect,” “forecast,” “goal,” “hope,” “intend,” “may,” “might,” “plan,” “project,” “seek,” “should,” “target” and variations of such words and similar expressions are intended to identify such forward-looking statements. In addition, any statements other than statements of historical fact are forward-looking statements, including statements regarding overall trends; operating cost and revenue trends; liquidity and capital needs; plans and expectations with respect to products, product candidates, corporate strategy, business and operations, financial projections and the use of capital; collaboration and licensing arrangements; patent protection and estimated loss of exclusivity for our products and product candidates; ongoing litigation and investigation matters; and other statements of expectations, beliefs, future plans and strategies, anticipated events or trends and similar expressions.
We have based these forward-looking statements on our current expectations about future events. These statements are not guarantees of future performance and involve risks, uncertainties and assumptions that are difficult to predict. Our actual results may differ materially from those suggested by these forward-looking statements for various reasons, including those identified in Part II, Item 1A. Risk Factors of this Quarterly Report on Form 10-Q. Given these risks and uncertainties, you are cautioned not to place undue reliance on forward-looking statements. The forward-looking statements included in this report are made only as of the date hereof unless otherwise specified. Except as required under federal securities laws and the rules and regulations of U.S. Securities and Exchange Commission, we do not undertake, and specifically decline, any obligation to update any of these statements or to publicly announce the results of any revisions to any forward-looking statements after the distribution of this report, whether as a result of new information, future events, changes in assumptions or otherwise. In evaluating our business, you should carefully consider the risks described in Part II, Item 1A. Risk Factors of this Quarterly Report on Form 10-Q. Any of the risks contained herein could materially and adversely affect our business, results of operations and financial condition.
2

PART I. FINANCIAL INFORMATION
Item 1. CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
GILEAD SCIENCES, INC.
CONDENSED CONSOLIDATED BALANCE SHEETS
(unaudited)

(in millions, except per share amounts) |  | March 31, 2024 |  | December 31, 2023
Assets |  |  |  |
Current assets: |  |  |  |
Cash and cash equivalents |  | $ | 4,718 |  |  | $ | 6,085 |
Short-term marketable debt securities |  | — |  |  | 1,179 |
Accounts receivable, net |  | 4,669 |  |  | 4,660 |
Inventories |  | 1,853 |  |  | 1,787 |
Prepaid and other current assets |  | 2,800 |  |  | 2,374 |
Total current assets |  | 14,041 |  |  | 16,085 |
Property, plant and equipment, net |  | 5,321 |  |  | 5,317 |
Long-term marketable debt securities |  | — |  |  | 1,163 |
Intangible assets, net |  | 23,428 |  |  | 26,454 |
Goodwill |  | 8,314 |  |  | 8,314 |
Other long-term assets |  | 5,188 |  |  | 4,792 |
Total assets |  | $ | 56,292 |  |  | $ | 62,125 |
Liabilities and Stockholders’ Equity |  |  |  |
Current liabilities: |  |  |  |
Accounts payable |  | $ | 622 |  |  | $ | 550 |
Accrued rebates |  | 4,263 |  |  | 3,802 |
Other current liabilities |  | 4,464 |  |  | 5,130 |
Current portion of long-term debt and other obligations, net |  | 3,667 |  |  | 1,798 |
Total current liabilities |  | 13,015 |  |  | 11,280 |
Long-term debt, net |  | 21,527 |  |  | 23,189 |
Long-term income taxes payable |  | 1,967 |  |  | 2,039 |
Deferred tax liability |  | 933 |  |  | 1,588 |
Other long-term obligations |  | 1,395 |  |  | 1,280 |
Commitments and contingencies (Note 10) |  |  |  |
Stockholders’ equity: |  |  |  |
Preferred stock, par value $0.001 per share; 5 shares authorized; none outstanding |  | — |  |  | — |
Common stock, par value $0.001 per share; 5,600 shares authorized; 1,246 shares issued and outstanding |  | 1 |  |  | 1 |
Additional paid-in capital |  | 6,813 |  |  | 6,500 |
Accumulated other comprehensive income |  | 69 |  |  | 28 |
Retained earnings |  | 10,656 |  |  | 16,304 |
Total Gilead stockholders’ equity |  | 17,539 |  |  | 22,833 |
Noncontrolling interest |  | (84) |  |  | (84) |
Total stockholders’ equity |  | 17,455 |  |  | 22,749 |
Total liabilities and stockholders’ equity |  | $ | 56,292 |  |  | $ | 62,125 |

See accompanying notes.
3

GILEAD SCIENCES, INC.
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
(unaudited)

|  | Three Months Ended |  |
|  | March 31, |  |
(in millions, except per share amounts) |  | 2024 |  | 2023 |  |  |  |
Revenues: |  |  |  |  |  |  |  |
Product sales |  | $ | 6,647 |  |  | $ | 6,306 |  |  |  |  |
Royalty, contract and other revenues |  | 39 |  |  | 46 |  |  |  |  |
Total revenues |  | 6,686 |  |  | 6,352 |  |  |  |  |
Costs and expenses: |  |  |  |  |  |  |  |
Cost of goods sold |  | 1,552 |  |  | 1,401 |  |  |  |  |
Research and development expenses |  | 1,520 |  |  | 1,447 |  |  |  |  |
Acquired in-process research and development expenses |  | 4,131 |  |  | 481 |  |  |  |  |
In-process research and development impairment |  | 2,430 |  |  | — |  |  |  |  |
Selling, general and administrative expenses |  | 1,375 |  |  | 1,319 |  |  |  |  |
Total costs and expenses |  | 11,008 |  |  | 4,647 |  |  |  |  |
Operating (loss) income |  | (4,322) |  |  | 1,705 |  |  |  |  |
Interest expense |  | 254 |  |  | 230 |  |  |  |  |
Other (income) expense, net |  | (91) |  |  | 174 |  |  |  |  |
(Loss) income before income taxes |  | (4,486) |  |  | 1,300 |  |  |  |  |
Income tax (benefit) expense |  | (315) |  |  | 316 |  |  |  |  |
Net (loss) income |  | (4,170) |  |  | 985 |  |  |  |  |
Net loss attributable to noncontrolling interest |  | — |  |  | (26) |  |  |  |  |
Net (loss) income attributable to Gilead |  | $ | (4,170) |  |  | $ | 1,010 |  |  |  |  |
Basic (loss) earnings per share attributable to Gilead |  | $ | (3.34) |  |  | $ | 0.81 |  |  |  |  |
Shares used in basic (loss) earnings per share attributable to Gilead calculation |  | 1,247 |  |  | 1,248 |  |  |  |  |
Diluted (loss) earnings per share attributable to Gilead |  | $ | (3.34) |  |  | $ | 0.80 |  |  |  |  |
Shares used in diluted (loss) earnings per share attributable to Gilead calculation |  | 1,247 |  |  | 1,261 |  |  |  |  |

See accompanying notes.
4

GILEAD SCIENCES, INC.
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME
(unaudited)

|  | Three Months Ended |  |
|  | March 31, |  |
(in millions) |  | 2024 |  | 2023 |  |  |  |
Net (loss) income |  | $ | (4,170) |  |  | $ | 985 |  |  |  |  |
Other comprehensive income (loss), net: |  |  |  |  |  |  |  |
Net foreign currency translation loss |  | (17) |  |  | (5) |  |  |  |  |
Available-for-sale debt securities: |  |  |  |  |  |  |  |
Net unrealized gain, net of tax impact of $0 and $0, respectively |  | — |  |  | 8 |  |  |  |  |
Reclassifications to net (loss) income, net of tax impact of $0 and $0, respectively |  | 5 |  |  | 1 |  |  |  |  |
Net change |  | 5 |  |  | 9 |  |  |  |  |
Cash flow hedges: |  |  |  |  |  |  |  |
Net unrealized gain (loss), net of tax impact of $8 and $(1), respectively |  | 53 |  |  | (6) |  |  |  |  |
Reclassifications to net (loss) income, net of tax impact of $0 and $3, respectively |  | — |  |  | (21) |  |  |  |  |
Net change |  | 53 |  |  | (26) |  |  |  |  |
Other comprehensive income (loss), net |  | 41 |  |  | (22) |  |  |  |  |
Comprehensive (loss) income, net |  | (4,130) |  |  | 962 |  |  |  |  |
Comprehensive loss attributable to noncontrolling interest, net |  | — |  |  | (26) |  |  |  |  |
Comprehensive (loss) income attributable to Gilead, net |  | $ | (4,130) |  |  | $ | 988 |  |  |  |  |

See accompanying notes.
5

GILEAD SCIENCES, INC.
CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY
(unaudited)

|  | Three Months Ended March 31, 2024
(in millions, except per share amounts) |  | Gilead Stockholders’ Equity |  | Noncontrolling Interest |  | Total Stockholders’ Equity
| Common Stock |  | Additional Paid-In Capital |  | Accumulated Other Comprehensive Income |  | Retained Earnings |
| Shares |  | Amount |  |
Balance as of December 31, 2023 |  | 1,246 |  |  | $ | 1 |  |  | $ | 6,500 |  |  | $ | 28 |  |  | $ | 16,304 |  |  | $ | (84) |  |  | $ | 22,749 |
Net loss |  | — |  |  | — |  |  | — |  |  | — |  |  | (4,170) |  |  | — |  |  | (4,170) |
Other comprehensive income, net |  | — |  |  | — |  |  | — |  |  | 41 |  |  | — |  |  | — |  |  | 41 |
Issuances under employee stock purchase plan |  | 1 |  |  | — |  |  | 80 |  |  | — |  |  | — |  |  | — |  |  | 80 |
Issuances under equity incentive plans |  | 6 |  |  | — |  |  | 65 |  |  | — |  |  | — |  |  | — |  |  | 65 |
Stock-based compensation |  | — |  |  | — |  |  | 188 |  |  | — |  |  | — |  |  | — |  |  | 188 |
Repurchases of common stock under repurchase programs ($76.88 average price per share) |  | (5) |  |  | — |  |  | (20) |  |  | — |  |  | (380) |  |  | — |  |  | (400) |
Repurchases of common stock for employee tax withholding under equity incentive plans and other |  | (2) |  |  | — |  |  | — |  |  | — |  |  | (116) |  |  | — |  |  | (116) |
Dividends declared ($0.77 per share) |  | — |  |  | — |  |  | — |  |  | — |  |  | (980) |  |  | — |  |  | (980) |
Balance as of March 31, 2024 |  | 1,246 |  |  | $ | 1 |  |  | $ | 6,813 |  |  | $ | 69 |  |  | $ | 10,656 |  |  | $ | (84) |  |  | $ | 17,455 |

|  | Three Months Ended March 31, 2023
(in millions, except per share amounts) |  | Gilead Stockholders’ Equity |  | Noncontrolling Interest |  | Total Stockholders’ Equity
| Common Stock |  | Additional Paid-In Capital |  | Accumulated Other Comprehensive Income (Loss) |  | Retained Earnings |
| Shares |  | Amount |  |
Balance as of December 31, 2022 |  | 1,247 |  |  | $ | 1 |  |  | $ | 5,550 |  |  | $ | 2 |  |  | $ | 15,687 |  |  | $ | (31) |  |  | $ | 21,209 |
Net income (loss) |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,010 |  |  | (26) |  |  | 985 |
Other comprehensive loss, net |  | — |  |  | — |  |  | — |  |  | (22) |  |  | — |  |  | — |  |  | (22) |
Issuances under employee stock purchase plan |  | 1 |  |  | — |  |  | 67 |  |  | — |  |  | — |  |  | — |  |  | 67 |
Issuances under equity incentive plans |  | 6 |  |  | — |  |  | 27 |  |  | — |  |  | — |  |  | — |  |  | 27 |
Stock-based compensation |  | — |  |  | — |  |  | 165 |  |  | — |  |  | — |  |  | — |  |  | 165 |
Repurchases of common stock under repurchase programs ($82.29 average price per share) |  | (5) |  |  | — |  |  | (17) |  |  | — |  |  | (383) |  |  | — |  |  | (400) |
Repurchases of common stock for employee tax withholding under equity incentive plans |  | (2) |  |  | — |  |  | — |  |  | — |  |  | (135) |  |  | — |  |  | (135) |
Dividends declared ($0.75 per share) |  | — |  |  | — |  |  | — |  |  | — |  |  | (957) |  |  | — |  |  | (957) |
Balance as of March 31, 2023 |  | 1,248 |  |  | $ | 1 |  |  | $ | 5,793 |  |  | $ | (20) |  |  | $ | 15,223 |  |  | $ | (58) |  |  | $ | 20,939 |

See accompanying notes.
6

GILEAD SCIENCES, INC.
CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
(unaudited)

|  | Three Months Ended
|  | March 31,
(in millions) |  | 2024 |  | 2023
Operating Activities: |  |  |  |
Net (loss) income |  | $ | (4,170) |  |  | $ | 985 |
Adjustments to reconcile net (loss) income to net cash provided by operating activities: |  |  |  |
Depreciation expense |  | 94 |  |  | 94 |
Amortization expense |  | 596 |  |  | 546 |
Stock-based compensation expense |  | 187 |  |  | 165 |
Deferred income taxes |  | (723) |  |  | (303) |
Net loss from equity securities |  | 14 |  |  | 256 |
Acquired in-process research and development expenses |  | 4,131 |  |  | 481 |
In-process research and development impairment |  | 2,430 |  |  | — |
Other |  | 119 |  |  | 63 |
Changes in operating assets and liabilities: |  |  |  |
Accounts receivable, net |  | (66) |  |  | 635 |
Inventories |  | (45) |  |  | (227) |
Prepaid expenses and other |  | (37) |  |  | 26 |
Accounts payable |  | 72 |  |  | (272) |
Income tax assets and liabilities, net |  | (208) |  |  | (161) |
Accrued and other liabilities |  | (175) |  |  | (543) |
Net cash provided by operating activities |  | 2,219 |  |  | 1,744 |
Investing Activities: |  |  |  |
Purchases of marketable debt securities |  | (244) |  |  | (527) |
Proceeds from sales of marketable debt securities |  | 2,265 |  |  | 167 |
Proceeds from maturities of marketable debt securities |  | 327 |  |  | 324 |
Acquisitions, including in-process research and development, net of cash acquired |  | (4,043) |  |  | (551) |
Purchases of equity securities |  | (410) |  |  | (125) |
Capital expenditures |  | (105) |  |  | (109) |
Other |  | 5 |  |  | (5) |
Net cash used in investing activities |  | (2,207) |  |  | (826) |
Financing Activities: |  |  |  |
Proceeds from issuances of common stock |  | 146 |  |  | 97 |
Repurchases of common stock under repurchase programs |  | (400) |  |  | (400) |
Payments of dividends |  | (990) |  |  | (969) |
Other |  | (116) |  |  | (135) |
Net cash used in financing activities |  | (1,361) |  |  | (1,406) |
Effect of exchange rate changes on cash and cash equivalents |  | (18) |  |  | 13 |
Net change in cash and cash equivalents |  | (1,367) |  |  | (476) |
Cash and cash equivalents at beginning of period |  | 6,085 |  |  | 5,412 |
Cash and cash equivalents at end of period |  | $ | 4,718 |  |  | $ | 4,936 |

See accompanying notes.
7

GILEAD SCIENCES, INC.
NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
(unaudited)
1. ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
The accompanying Condensed Consolidated Financial Statements and related Notes to Condensed Consolidated Financial Statements of Gilead Sciences, Inc. (“Gilead,” “we,” “our” or “us”) should be read in conjunction with the audited Consolidated Financial Statements and the related notes thereto for the year ended December 31, 2023, included in our Annual Report on Form 10-K filed with U.S. Securities and Exchange Commission. There have been no material changes to our organization or summary of significant accounting policies as disclosed in that filing.
These interim financial statements have been prepared in accordance with U.S. generally accepted accounting principles for interim financial information and include all adjustments consisting of normal recurring adjustments that the management of Gilead believes are necessary for a fair presentation of the periods presented and are not necessarily indicative of results expected for the full fiscal year or for any subsequent interim period.
Certain amounts and percentages in these Condensed Consolidated Financial Statements and accompanying notes may not sum or recalculate due to rounding.
8

2. REVENUES
Disaggregation of Revenues
The following table summarizes our Total revenues:

|  | Three Months Ended March 31, 2024 |  | Three Months Ended March 31, 2023
(in millions) |  | U.S. |  | Europe |  | Rest of World |  | Total |  | U.S. |  | Europe |  | Rest of World |  | Total
Product sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
HIV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Biktarvy |  | $ | 2,315 |  |  | $ | 365 |  |  | $ | 265 |  |  | $ | 2,946 |  |  | $ | 2,161 |  |  | $ | 304 |  |  | $ | 212 |  |  | $ | 2,677 |
Descovy |  | 371 |  |  | 26 |  |  | 29 |  |  | 426 |  |  | 395 |  |  | 25 |  |  | 29 |  |  | 449 |
Genvoya |  | 332 |  |  | 49 |  |  | 21 |  |  | 403 |  |  | 417 |  |  | 55 |  |  | 29 |  |  | 501 |
Odefsey |  | 223 |  |  | 76 |  |  | 11 |  |  | 310 |  |  | 230 |  |  | 76 |  |  | 11 |  |  | 317 |
Symtuza - Revenue share(1) |  | 104 |  |  | 33 |  |  | 3 |  |  | 141 |  |  | 98 |  |  | 36 |  |  | 4 |  |  | 138 |
Other HIV(2) |  | 60 |  |  | 45 |  |  | 12 |  |  | 117 |  |  | 62 |  |  | 32 |  |  | 13 |  |  | 108 |
Total HIV |  | 3,405 |  |  | 596 |  |  | 342 |  |  | 4,342 |  |  | 3,364 |  |  | 528 |  |  | 298 |  |  | 4,190 |
Liver Disease |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sofosbuvir/Velpatasvir(3) |  | 248 |  |  | 79 |  |  | 78 |  |  | 405 |  |  | 204 |  |  | 90 |  |  | 90 |  |  | 385 |
Vemlidy |  | 95 |  |  | 11 |  |  | 119 |  |  | 225 |  |  | 87 |  |  | 9 |  |  | 103 |  |  | 199 |
Other Liver Disease(4) |  | 42 |  |  | 47 |  |  | 19 |  |  | 107 |  |  | 27 |  |  | 41 |  |  | 23 |  |  | 91 |
Total Liver Disease |  | 385 |  |  | 137 |  |  | 215 |  |  | 737 |  |  | 318 |  |  | 140 |  |  | 217 |  |  | 675 |
Veklury |  | 315 |  |  | 70 |  |  | 169 |  |  | 555 |  |  | 252 |  |  | 111 |  |  | 209 |  |  | 573 |
Oncology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cell Therapy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tecartus |  | 55 |  |  | 36 |  |  | 8 |  |  | 100 |  |  | 59 |  |  | 27 |  |  | 3 |  |  | 89 |
Yescarta |  | 170 |  |  | 158 |  |  | 52 |  |  | 380 |  |  | 210 |  |  | 121 |  |  | 28 |  |  | 359 |
Total Cell Therapy |  | 225 |  |  | 195 |  |  | 60 |  |  | 480 |  |  | 269 |  |  | 148 |  |  | 31 |  |  | 448 |
Trodelvy |  | 206 |  |  | 68 |  |  | 36 |  |  | 309 |  |  | 162 |  |  | 54 |  |  | 6 |  |  | 222 |
Total Oncology |  | 431 |  |  | 262 |  |  | 96 |  |  | 789 |  |  | 431 |  |  | 202 |  |  | 37 |  |  | 670 |
Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AmBisome |  | 14 |  |  | 70 |  |  | 60 |  |  | 144 |  |  | 6 |  |  | 60 |  |  | 49 |  |  | 116 |
Other(5) |  | 59 |  |  | 9 |  |  | 12 |  |  | 80 |  |  | 62 |  |  | 12 |  |  | 9 |  |  | 83 |
Total Other |  | 73 |  |  | 79 |  |  | 71 |  |  | 224 |  |  | 69 |  |  | 72 |  |  | 58 |  |  | 199 |
Total product sales |  | 4,609 |  |  | 1,144 |  |  | 894 |  |  | 6,647 |  |  | 4,434 |  |  | 1,053 |  |  | 819 |  |  | 6,306 |
Royalty, contract and other revenues |  | 23 |  |  | 15 |  |  | 1 |  |  | 39 |  |  | 18 |  |  | 26 |  |  | 2 |  |  | 46 |
Total revenues |  | $ | 4,633 |  |  | $ | 1,159 |  |  | $ | 894 |  |  | $ | 6,686 |  |  | $ | 4,452 |  |  | $ | 1,079 |  |  | $ | 821 |  |  | $ | 6,352 |

_______________________________
(1) Represents our revenue from cobicistat (“C”), emtricitabine (“FTC”) and tenofovir alafenamide (“TAF”) in Symtuza (darunavir/C/FTC/TAF), a fixed dose combination product commercialized by Janssen Sciences Ireland Unlimited Company (“Janssen”).
(2) Includes Atripla, Complera/Eviplera, Emtriva, Sunlenca, Stribild, Truvada and Tybost.
(3) Includes Epclusa and the authorized generic version of Epclusa sold by Gilead’s separate subsidiary, Asegua Therapeutics LLC (“Asegua”).
(4) Includes ledipasvir/sofosbuvir (Harvoni and the authorized generic version of Harvoni sold by Asegua), Hepcludex, Hepsera, Sovaldi, Viread and Vosevi.
(5) Includes Cayston, Jyseleca, Letairis, Ranexa and Zydelig.
Revenues Recognized from Performance Obligations Satisfied in Prior Years
The following table summarizes revenues recognized from performance obligations satisfied in prior years:

|  | Three Months Ended |  |
|  | March 31, |  |
(in millions) |  | 2024 |  | 2023 |  |  |  |
Revenue share with Janssen and royalties for licenses of intellectual property |  | $ | 171 |  |  | $ | 192 |  |  |  |  |
Changes in estimates |  | $ | 160 |  |  | $ | 160 |  |  |  |  |

9

Contract Balances
The following table summarizes our contract balances:

(in millions) |  | March 31, 2024 |  | December 31, 2023
Contract assets(1) |  | $ | 144 |  |  | $ | 117 |
Contract liabilities(2) |  | $ | 84 |  |  | $ | 109 |

________________________________
(1) Consists of unbilled amounts primarily from arrangements where the licensing of intellectual property is the only or predominant performance obligation.
(2) Generally results from receipt of advance payment before our performance under the contract.
3. FAIR VALUE MEASUREMENTS
The following table summarizes the types of assets and liabilities measured at fair value on a recurring basis by level within the fair value hierarchy:

|  | March 31, 2024 |  | December 31, 2023
(in millions) |  | Level 1 |  | Level 2 |  | Level 3 |  | Total |  | Level 1 |  | Level 2 |  | Level 3 |  | Total
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Available-for-sale debt securities(1): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. treasury securities |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 426 |  |  | $ | — |  |  | $ | — |  |  | $ | 426 |
U.S. government agencies securities |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 127 |  |  | — |  |  | 127 |
Non-U.S. government securities |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 10 |  |  | — |  |  | 10 |
Certificates of deposit |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 45 |  |  | — |  |  | 45 |
Corporate debt securities |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 1,451 |  |  | — |  |  | 1,451 |
Residential mortgage and asset-backed securities |  | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | 367 |  |  | — |  |  | 367 |
Equity securities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Money market funds |  | 1,550 |  |  | — |  |  | — |  |  | 1,550 |  |  | 4,465 |  |  | — |  |  | — |  |  | 4,465 |
Publicly traded equity securities(2) |  | 1,808 |  |  | — |  |  | — |  |  | 1,808 |  |  | 1,458 |  |  | — |  |  | — |  |  | 1,458 |
Deferred compensation plan |  | 318 |  |  | — |  |  | — |  |  | 318 |  |  | 284 |  |  | — |  |  | — |  |  | 284 |
Foreign currency derivative contracts |  | — |  |  | 39 |  |  | — |  |  | 39 |  |  | — |  |  | 7 |  |  | — |  |  | 7 |
Total |  | $ | 3,676 |  |  | $ | 39 |  |  | $ | — |  |  | $ | 3,715 |  |  | $ | 6,633 |  |  | $ | 2,007 |  |  | $ | — |  |  | $ | 8,639 |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Liability for MYR GmbH (“MYR”) contingent consideration |  | $ | — |  |  | $ | — |  |  | $ | 222 |  |  | $ | 222 |  |  | $ | — |  |  | $ | — |  |  | $ | 228 |  |  | $ | 228 |
Deferred compensation plan |  | 318 |  |  | — |  |  | — |  |  | 318 |  |  | 283 |  |  | — |  |  | — |  |  | 283 |
Foreign currency derivative contracts |  | — |  |  | 10 |  |  | — |  |  | 10 |  |  | — |  |  | 59 |  |  | — |  |  | 59 |
Total |  | $ | 318 |  |  | $ | 10 |  |  | $ | 222 |  |  | $ | 549 |  |  | $ | 283 |  |  | $ | 59 |  |  | $ | 228 |  |  | $ | 570 |

_______________________________
(1) During the three months ended March 31, 2024, we sold all of our available-for-sale debt securities and used the proceeds to partially fund our acquisition of CymaBay Therapeutics, Inc. (“CymaBay”) discussed in Note 6. Acquisitions, Collaborations and Other Arrangements.
(2) Publicly traded equity securities include investments in Galapagos NV (“Galapagos”) of $535 million and Arcellx, Inc. (“Arcellx”) of $467 million as of March 31, 2024, which are subject to contractual sale restrictions until August 2024 and June 2025, respectively.
Level 2 Inputs
Available-for-Sale Debt Securities
For our available-for-sale debt securities, we estimate the fair values by reviewing trading activity and pricing as of the measurement date and by taking into consideration valuations obtained from third-party pricing services. The pricing services utilize industry standard valuation models, including both income-based and market-based approaches, for which all significant inputs are observable, either directly or indirectly, to estimate the fair value. These inputs include reported trades of and broker/dealer quotes on the same or similar securities, issuer credit spreads, benchmark securities, prepayment/default projections based on historical data and other observable inputs.
10

Foreign Currency Derivative Contracts
Our foreign currency derivative contracts have maturities of 18 months or less and all are with counterparties that have a minimum credit rating of A- or equivalent by S&P Global Ratings, Moody’s Investors Service, Inc. or Fitch Ratings, Inc. We estimate the fair values of these contracts by utilizing an income-based industry standard valuation model for which all significant inputs are observable, either directly or indirectly. These inputs include foreign currency exchange rates, Secured Overnight Financing Rate (“SOFR”) and swap rates. These inputs, where applicable, are observable at commonly quoted intervals.
Senior Unsecured Notes
The following table summarizes the total estimated fair value and carrying value of our senior unsecured notes, determined using Level 2 inputs based on their quoted market values:

(in millions) |  | March 31, 2024 |  | December 31, 2023
Fair value |  | $ | 21,930 |  |  | $ | 22,567 |
Carrying value |  | $ | 23,838 |  |  | $ | 23,834 |

Level 3 Inputs
Contingent Consideration Liability
In connection with our first quarter 2021 acquisition of MYR, we are subject to a potential contingent consideration payment of up to €300 million, subject to customary adjustments, which is revalued each reporting period using probability-weighted scenarios for U.S. Food and Drug Administration (“FDA”) approval of Hepcludex until the related contingency is resolved.
The following table summarizes the change in fair value of our contingent consideration liability:

|  | Three Months Ended |  |  |
|  | March 31, |  |  |
(in millions) |  | 2024 |  | 2023 |  |  |  |  |
Beginning balance |  | $ | 228 |  |  | $ | 275 |  |  |  |  |  |
Changes in valuation assumptions(1) |  | — |  |  | (3) |  |  |  |  |  |
Effect of foreign exchange remeasurement(2) |  | (6) |  |  | 5 |  |  |  |  |  |
Ending balance(3) |  | $ | 222 |  |  | $ | 277 |  |  |  |  |  |

________________________________
(1) Included in Research and development expenses on our Condensed Consolidated Statements of Operations. The change in 2023 primarily related to an update in expected payment dates.
(2) Included in Other (income) expense, net on our Condensed Consolidated Statements of Operations.
(3) Included in Other long-term obligations on our Condensed Consolidated Balance Sheets.
Liability Related to Future Royalties
We recorded a liability related to future royalties as part of our fourth quarter 2020 acquisition of Immunomedics, Inc. (“Immunomedics”), which is subsequently amortized using the effective interest method over the remaining estimated life. The fair value of the liability related to future royalties was approximately $1.2 billion as of March 31, 2024 and December 31, 2023, and the carrying value was $1.2 billion as of March 31, 2024 and December 31, 2023.
Liability Related to Assumed Financing Arrangement
As part of the CymaBay acquisition, we assumed a liability for a financing arrangement (see Note 6. Acquisitions, Collaborations and Other Arrangements). The fair value of the liability approximates its carrying value of $199 million.
Nonrecurring Fair Value Measurements
During the three months ended March 31, 2024, we recorded a partial impairment charge of $2.4 billion related to certain acquired in-process research and development (“IPR&D”) assets. See Note 7. Intangible Assets for additional information.
Fair Value Level Transfers
There were no transfers between Level 1, Level 2 and Level 3 in the periods presented.
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4. AVAILABLE-FOR-SALE DEBT SECURITIES AND EQUITY SECURITIES
Available-for-Sale Debt Securities
During the three months ended March 31, 2024, we sold all of our available-for-sale debt securities and used the proceeds to partially fund our acquisition of CymaBay discussed in Note 6. Acquisitions, Collaborations and Other Arrangements. As such, the following tables only show balances for the period prior to this liquidation.
The following table summarizes our available-for-sale debt securities:

|  |  |  | December 31, 2023
(in millions) |  |  |  |  |  |  |  |  |  | Amortized Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
U.S. treasury securities |  |  |  |  |  |  |  |  |  | $ | 427 |  |  | $ | — |  |  | $ | (1) |  |  | $ | 426 |
U.S. government agencies securities |  |  |  |  |  |  |  |  |  | 127 |  |  | — |  |  | — |  |  | 127 |
Non-U.S. government securities |  |  |  |  |  |  |  |  |  | 10 |  |  | — |  |  | — |  |  | 10 |
Certificates of deposit |  |  |  |  |  |  |  |  |  | 45 |  |  | — |  |  | — |  |  | 45 |
Corporate debt securities |  |  |  |  |  |  |  |  |  | 1,455 |  |  | 4 |  |  | (8) |  |  | 1,451 |
Residential mortgage and asset-backed securities |  |  |  |  |  |  |  |  |  | 366 |  |  | 1 |  |  | — |  |  | 367 |
Total |  |  |  |  |  |  |  |  |  | $ | 2,430 |  |  | $ | 5 |  |  | $ | (10) |  |  | $ | 2,426 |

The following table summarizes information related to available-for-sale debt securities that have been in a continuous unrealized loss position, classified by length of time:

|  | December 31, 2023
|  | Less Than 12 Months |  | 12 Months or Longer |  | Total
(in millions) |  | Gross Unrealized Losses |  | Estimated Fair Value |  | Gross Unrealized Losses |  | Estimated Fair Value |  | Gross Unrealized Losses |  | Estimated Fair Value
U.S. treasury securities |  | $ | — |  |  | $ | 161 |  |  | $ | (1) |  |  | $ | 48 |  |  | $ | (1) |  |  | $ | 209 |
U.S. government agencies securities |  | — |  |  | 106 |  |  | — |  |  | 2 |  |  | — |  |  | 108 |
Non-U.S. government securities |  | — |  |  | 5 |  |  | — |  |  | 5 |  |  | — |  |  | 10 |
Corporate debt securities |  | (1) |  |  | 333 |  |  | (7) |  |  | 546 |  |  | (8) |  |  | 878 |
Residential mortgage and asset-backed securities |  | — |  |  | 123 |  |  | — |  |  | 24 |  |  | — |  |  | 147 |
Total |  | $ | (2) |  |  | $ | 727 |  |  | $ | (8) |  |  | $ | 624 |  |  | $ | (10) |  |  | $ | 1,351 |

The following table summarizes the classification of our available-for-sale debt securities in our Condensed Consolidated Balance Sheets:

(in millions) |  |  |  | December 31, 2023
Cash and cash equivalents |  |  |  | $ | 83 |
Short-term marketable debt securities |  |  |  | 1,179 |
Long-term marketable debt securities |  |  |  | 1,163 |
Total |  |  |  | $ | 2,426 |

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Equity Securities
The following table summarizes the classification of our equity securities on our Condensed Consolidated Balance Sheets:

(in millions) |  | March 31, 2024 |  | December 31, 2023
Equity securities measured at fair value: |  |  |  |
Cash and cash equivalents |  | $ | 1,550 |  |  | $ | 4,465 |
Prepaid and other current assets |  | 1,341 |  |  | 1,086 |
Other long-term assets |  | 785 |  |  | 656 |
Equity method investments and other equity investments without readily determinable fair values: |  |  |  |
Other long-term assets |  | 359 |  |  | $ | 340 |
Total |  | $ | 4,036 |  |  | $ | 6,547 |

For our equity method investments in Galapagos and Arcus Biosciences, Inc. (“Arcus”), we elected and applied the fair value option as we believe it best reflects the underlying economics of these investments. Our investment in Galapagos is subject to certain lock-up provisions until August 2024 and was classified in Prepaid and other current assets as of March 31, 2024 and December 31, 2023 at $535 million and $686 million, respectively. Our investment in Arcus was classified in Prepaid and other current assets as of March 31, 2024 and December 31, 2023 at $568 million and $283 million, respectively.
Unrealized Gains and Losses
The following table summarizes net unrealized gains and losses on equity securities still held as of the respective balance sheet dates, included in Other (income) expense, net on our Condensed Consolidated Statements of Operations:

|  | Three Months Ended
|  | March 31,
(in millions) |  | 2024 |  | 2023
Net unrealized losses on equity securities still held |  | $ | 15 |  |  | $ | 187 |

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5. DERIVATIVE FINANCIAL INSTRUMENTS
Our operations in foreign countries expose us to market risk associated with foreign currency exchange rate fluctuations between the U.S. dollar and various foreign currencies, primarily the Euro. To manage this risk, we hedge a portion of our foreign currency exposures related to outstanding monetary assets and liabilities as well as forecasted product sales using foreign currency exchange forward contracts. In general, the market risk related to these contracts is offset by corresponding gains and losses on the hedged transactions. The credit risk associated with these contracts is driven by changes in interest and currency exchange rates and, as a result, varies over time. By working only with major banks and closely monitoring current market conditions, we seek to limit the risk that counterparties to these contracts may be unable to perform. We also seek to limit our risk of loss by entering into contracts that permit net settlement at maturity. Therefore, our overall risk of loss in the event of a counterparty default is limited to the amount of any unrealized gains on outstanding contracts (i.e., those contracts that have a positive fair value) at the date of default. We do not enter into derivative contracts for trading purposes.
The derivative instruments we use to hedge our exposures for certain monetary assets and liabilities that are denominated in a non-functional currency are not designated as hedges. The derivative instruments we use to hedge our exposures for forecasted product sales are designated as cash flow hedges and have maturities of 18 months or less.
We held foreign currency exchange contracts with outstanding notional amounts of $2.0 billion and $2.5 billion as of March 31, 2024 and December 31, 2023, respectively.
While all our derivative contracts allow us the right to offset assets and liabilities, we have presented amounts in our Condensed Consolidated Balance Sheets on a gross basis. The following table summarizes the classification and fair values of derivative instruments, including the potential effect of offsetting:

|  | March 31, 2024
(in millions) |  | Prepaid and other current assets |  | Other long-term assets |  | Total Derivative Assets |  | Other current liabilities |  | Other long-term obligations |  | Total Derivative Liabilities
Foreign currency exchange contracts designated as hedges |  | $ | 28 |  |  | $ | 2 |  |  | $ | 30 |  |  | $ | 5 |  |  | $ | 1 |  |  | $ | 6 |
Foreign currency exchange contracts not designated as hedges |  | 9 |  |  | — |  |  | 9 |  |  | 4 |  |  | — |  |  | 4 |
Total derivatives presented gross on the Condensed Consolidated Balance Sheets |  |  |  |  |  | $ | 39 |  |  |  |  |  |  | $ | 10 |
Gross amounts not offset on the Condensed Consolidated Balance Sheets: |  |  |  |  |  |  |  |  |  |  |  |
Derivative financial instruments |  |  |  |  |  | $ | (8) |  |  |  |  |  |  | $ | (8) |
Cash collateral received / pledged |  |  |  |  |  | — |  |  |  |  |  |  | — |
Net amount (legal offset) |  |  |  |  |  | $ | 31 |  |  |  |  |  |  | $ | 1 |

|  | December 31, 2023
(in millions) |  | Prepaid and other current assets |  | Other long-term assets |  | Total Derivative Assets |  | Other current liabilities |  | Other long-term obligations |  | Total Derivative Liabilities
Foreign currency exchange contracts designated as hedges |  | $ | 6 |  |  | $ | — |  |  | $ | 6 |  |  | $ | 38 |  |  | $ | 7 |  |  | $ | 45 |
Foreign currency exchange contracts not designated as hedges |  | 1 |  |  | — |  |  | 1 |  |  | 15 |  |  | — |  |  | 15 |
Total derivatives presented gross on the Condensed Consolidated Balance Sheets |  |  |  |  |  | $ | 7 |  |  |  |  |  |  | $ | 59 |
Gross amounts not offset on the Condensed Consolidated Balance Sheets: |  |  |  |  |  |  |  |  |  |  |  |
Derivative financial instruments |  |  |  |  |  | $ | (7) |  |  |  |  |  |  | $ | (7) |
Cash collateral received / pledged |  |  |  |  |  | — |  |  |  |  |  |  | — |
Net amount (legal offset) |  |  |  |  |  | $ | — |  |  |  |  |  |  | $ | 52 |

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The following table summarizes the effect of our derivative contracts on our Condensed Consolidated Financial Statements:

|  | Three Months Ended |  |
|  | March 31, |  |
(in millions) |  | 2024 |  | 2023 |  |  |  |
Derivatives designated as hedges: |  |  |  |  |  |  |  |
Net gain (loss) recognized in Accumulated other comprehensive income |  | $ | 61 |  |  | $ | (6) |  |  |  |  |
Net gain reclassified from Accumulated other comprehensive income into Product sales |  | $ | — |  |  | $ | 24 |  |  |  |  |
Derivatives not designated as hedges: |  |  |  |  |  |  |  |
Net gain (loss) recognized in Other income (expense), net |  | $ | 23 |  |  | $ | (3) |  |  |  |  |

The majority of gains and losses related to the hedged forecasted transactions reported in Accumulated other comprehensive income as of March 31, 2024 are expected to be reclassified to Product sales within 12 months. There were no discontinuances of cash flow hedges for the three months ended March 31, 2024 and 2023.
The cash flow effects of our derivative contracts for the three months ended March 31, 2024 and 2023 were included within Net cash provided by operating activities on our Condensed Consolidated Statements of Cash Flows.
15

6. ACQUISITIONS, COLLABORATIONS AND OTHER ARRANGEMENTS
We enter into acquisitions, licensing and strategic collaborations and other similar arrangements with third parties for the research, development and commercialization of certain products and product candidates. The collaborations and other arrangements may involve two or more parties who are active participants in the operating activities of the collaboration and are exposed to significant risks and rewards depending on the commercial success of the activities. The financial terms of these arrangements may include non-refundable upfront payments, expense reimbursements or payments by us for options to acquire certain rights, contingent obligations by us for potential development and regulatory milestone payments and/or sales-based milestone payments, royalty payments, revenue or profit-sharing arrangements, cost-sharing arrangements and equity investments.
Acquisitions
CymaBay
In March 2024, we completed the acquisition of CymaBay Therapeutics, Inc. (“CymaBay”) for total consideration of $3.9 billion, net of cash acquired. Upon closing, CymaBay became our wholly-owned subsidiary. CymaBay’s lead program, seladelpar, is an investigational, oral, selective peroxisome proliferator-activated receptor delta agonist, shown to regulate critical metabolic and liver disease pathways. Based on data evaluating the efficacy and tolerability profile of seladelpar in more than 500 participants across Phase 2 and Phase 3 studies, a new drug application for seladelpar was submitted to FDA in December 2023.
We accounted for this transaction as an asset acquisition since the lead asset, seladelpar, represents substantially all of the fair value of the gross assets acquired. During the three months ended March 31, 2024, we recorded a $3.9 billion charge, representing an acquired IPR&D asset with no alternative future use, to Acquired in-process research and development expenses on our Condensed Consolidated Statements of Operations. In connection with this acquisition, we recorded $263 million of assets acquired, primarily consisting of deferred tax assets, and $228 million of liabilities assumed, primarily related to an assumed financing arrangement which would be repaid partially upon a change of control and partially upon an approval-based fixed milestone and future sales-based milestones related to seladelpar (see Note 9. Debt and Credit Facilities). During the three months ended March 31, 2024, we also recorded share-based compensation expense of $133 million related to the cash settlement of unvested CymaBay employee stock awards attributable to post-acquisition services, with $67 million being recorded in Research and development expenses and $67 million in Selling, general and administrative expenses on our Condensed Consolidated Statements of Operations.
Tmunity
In February 2023, we closed an agreement to acquire Tmunity Therapeutics, Inc. (“Tmunity”), a clinical-stage, private biotechnology company focused on next-generation chimeric antigen receptor (“CAR”) T-therapies and technologies. Under the terms of the agreement, we acquired all outstanding shares of Tmunity other than those already owned by Gilead for approximately $300 million in cash consideration. As a result, Tmunity became our wholly-owned subsidiary.
We accounted for the transaction as an asset acquisition and recorded a $244 million charge to Acquired in-process research and development expenses on our Condensed Consolidated Statements of Operations during the three months ended March 31, 2023. The remaining purchase price relates to various other assets acquired and liabilities assumed, consisting primarily of deferred tax assets. Under the agreement, the former shareholders of Tmunity and the University of Pennsylvania are eligible to receive a mix of up to approximately $1.0 billion in potential future payments upon achievement of certain development, regulatory and sales-based milestones, as well as royalty payments on sales, with $25 million of that having been charged to Acquired in-process research and development expenses in 2023 and paid in January 2024.
Collaborations and Other Arrangements
Arcus
In January 2024, we amended our collaboration agreement with Arcus whereby we acquired approximately 15.2 million additional shares of Arcus common stock at a premium for $320 million, increasing our ownership to 30.1 million shares, or 33% of the issued and outstanding voting stock of Arcus immediately following the closing of the transaction. We recorded $233 million for the fair value of the equity investment in Prepaid and other current assets on our Condensed Consolidated Balance Sheets and $87 million for the premium in Other (income) expense, net on our Condensed Consolidated Statements of Operations. We also recorded a charge for the $100 million fourth anniversary option continuation fee under the amended agreement to Acquired in-process research and development expenses on our Condensed Consolidated Statements of Operations, which has been accrued as of March 31, 2024 with payment expected to be made by the third quarter of 2024. At that time, this payment will be included within Net cash used in investing activities on our Condensed Consolidated Statements of Cash Flows. Our number of designees on Arcus’ board of directors was also increased to three.
16

7. INTANGIBLE ASSETS
The following table summarizes our Intangible assets, net:

|  | March 31, 2024 |  | December 31, 2023
(in millions) |  | Gross Carrying Amount |  | Accumulated Amortization |  | Foreign Currency Translation Adjustment |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Foreign Currency Translation Adjustment |  | Net Carrying Amount
Finite-lived assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intangible asset – sofosbuvir |  | $ | 10,720 |  |  | $ | (7,224) |  |  | $ | — |  |  | $ | 3,496 |  |  | $ | 10,720 |  |  | $ | (7,050) |  |  | $ | — |  |  | $ | 3,670 |
Intangible asset – axicabtagene ciloleucel |  | 7,110 |  |  | (2,416) |  |  | — |  |  | 4,694 |  |  | 7,110 |  |  | (2,314) |  |  | — |  |  | 4,796 |
Intangible asset – Trodelvy |  | 11,730 |  |  | (2,272) |  |  | — |  |  | 9,458 |  |  | 11,730 |  |  | (2,002) |  |  | — |  |  | 9,728 |
Intangible asset – Hepcludex |  | 845 |  |  | (265) |  |  | — |  |  | 580 |  |  | 845 |  |  | (243) |  |  | — |  |  | 602 |
Other |  | 1,414 |  |  | (855) |  |  | 1 |  |  | 560 |  |  | 1,414 |  |  | (827) |  |  | 1 |  |  | 588 |
Total finite-lived assets |  | 31,819 |  |  | (13,032) |  |  | 1 |  |  | 18,788 |  |  | 31,819 |  |  | (12,436) |  |  | 1 |  |  | 19,384 |
Indefinite-lived assets – IPR&D(1) |  | 4,640 |  |  | — |  |  | — |  |  | 4,640 |  |  | 7,070 |  |  | — |  |  | — |  |  | 7,070 |
Total intangible assets |  | $ | 36,459 |  |  | $ | (13,032) |  |  | $ | 1 |  |  | $ | 23,428 |  |  | $ | 38,889 |  |  | $ | (12,436) |  |  | $ | 1 |  |  | $ | 26,454 |

_______________________________
(1) The Indefinite-lived assets – IPR&D balance as of December 31, 2023 was comprised of $5.9 billion related to sacituzumab govitecan-hziy (“SG”) for non-small cell lung cancer (“NSCLC”) and $1.1 billion related to bulveritide. See “2024 IPR&D Impairment” below for 2024 activity.
Impairment Assessments
No intangible asset-related indicators of impairment were noted for the three months ended March 31, 2024 and 2023, except as described under “2024 IPR&D Impairment” below.
2024 IPR&D Impairment
In January 2024, we received data from our Phase 3 EVOKE-01 study of Trodelvy evaluating SG indicating that the study did not meet its primary endpoint of overall survival in previously treated metastatic NSCLC, thus triggering a review for potential impairment of the NSCLC IPR&D intangible asset.
Based on our evaluation of the study results and all other data currently available, and in connection with the preparation of the financial statements for the first quarter, we performed an interim impairment test and determined that the revised estimated fair value of the NSCLC IPR&D intangible asset was below its carrying value. As a result, we recognized a partial impairment charge of $2.4 billion in In-process research and development impairment on our Condensed Consolidated Statements of Operations for the three months ended March 31, 2024.
To arrive at the revised estimated fair value, we used a probability-weighted income approach that discounts expected future cash flows to present value, which requires the use of Level 3 fair value measurements and inputs, and requires the use of critical estimated inputs, including: revenues and operating profits related to the planned utilization of SG in NSCLC, which includes inputs such as addressable patient population, projected market share, treatment duration, and the life of the potential commercialized product; the probability of technical and regulatory success; the time and resources needed to complete the development and approval of SG in NSCLC; an appropriate discount rate based on the estimated weighted-average cost of capital for companies with profiles similar to our profile; and risks related to the viability of and potential alternative treatments in any future target markets. We used a discount rate of 7.00% which is based on the estimated weighted-average cost of capital for companies with profiles similar to ours. The revised estimated fair value of the NSCLC IPR&D intangible asset was $3.5 billion as of March 31, 2024.
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8. OTHER FINANCIAL INFORMATION
Accounts Receivable, Net
The following table summarizes our Accounts receivable, net:

(in millions) |  | March 31, 2024 |  | December 31, 2023
Accounts receivable |  | $ | 5,518 |  |  | $ | 5,495 |
Less: allowances for chargebacks |  | 693 |  |  | 679 |
Less: allowances for cash discounts and other |  | 96 |  |  | 101 |
Less: allowances for credit losses |  | 59 |  |  | 56 |
Accounts receivable, net |  | $ | 4,669 |  |  | $ | 4,660 |

The majority of our trade accounts receivable arises from product sales in the U.S. and Europe.
Inventories
The following table summarizes our Inventories:

(in millions) |  | March 31, 2024 |  | December 31, 2023
Raw materials |  | $ | 1,237 |  |  | $ | 1,246 |
Work in process |  | 778 |  |  | 847 |
Finished goods |  | 1,348 |  |  | 1,272 |
Total |  | $ | 3,363 |  |  | $ | 3,366 |
Reported as: |  |  |  |
Inventories |  | $ | 1,853 |  |  | $ | 1,787 |
Other long-term assets(1) |  | 1,510 |  |  | 1,578 |
Total |  | $ | 3,363 |  |  | $ | 3,366 |

_______________________________
(1) Amounts primarily consist of raw materials.
Other Current Liabilities
The following table summarizes the components of Other current liabilities:

(in millions) |  | March 31, 2024 |  | December 31, 2023
Compensation and employee benefits |  | $ | 755 |  |  | $ | 1,201 |
Income taxes payable |  | 1,198 |  |  | 1,208 |
Allowance for sales returns |  | 376 |  |  | 387 |
Other |  | 2,135 |  |  | 2,334 |
Other current liabilities |  | $ | 4,464 |  |  | $ | 5,130 |

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Accumulated Other Comprehensive Income (Loss)
The following tables summarize the changes in Accumulated other comprehensive income by component, net of tax:

(in millions) |  | Foreign Currency Translation |  | Unrealized Gains and Losses on Available-for-Sale Debt Securities, Net of Tax |  | Unrealized Gains and Losses on Cash Flow Hedges, Net of Tax |  | Total
Balance as of December 31, 2023 |  | $ | 62 |  |  | $ | (5) |  |  | $ | (29) |  |  | $ | 28 |
Net unrealized (loss) gain |  | (17) |  |  | — |  |  | 53 |  |  | 36 |
Reclassifications to net income |  | — |  |  | 5 |  |  | — |  |  | 5 |
Net current period other comprehensive (loss) income |  | (17) |  |  | 5 |  |  | 53 |  |  | 41 |
Balance as of March 31, 2024 |  | $ | 45 |  |  | $ | — |  |  | $ | 24 |  |  | $ | 69 |

(in millions) |  | Foreign Currency Translation |  | Unrealized Gains and Losses on Available-for-Sale Debt Securities, Net of Tax |  | Unrealized Gains and Losses on Cash Flow Hedges, Net of Tax |  | Total
Balance as of December 31, 2022 |  | $ | 2 |  |  | $ | (33) |  |  | $ | 33 |  |  | $ | 2 |
Net unrealized gain (loss) |  | (5) |  |  | 8 |  |  | (6) |  |  | (2) |
Reclassifications to net income |  | — |  |  | 1 |  |  | (21) |  |  | (20) |
Net current period other comprehensive (loss) income |  | (5) |  |  | 9 |  |  | (26) |  |  | (22) |
Balance as of March 31, 2023 |  | $ | (3) |  |  | $ | (24) |  |  | $ | 7 |  |  | $ | (20) |

Restructuring
During the three months ended March 31, 2024, we incurred restructuring charges of $63 million primarily related to the initiation of reductions in our commercial and research and development workforce. We recorded $50 million of these charges in Research and development expenses and $13 million of these charges in Selling, general and administrative expenses on our Condensed Consolidated Statements of Operations.
19

9. DEBT AND CREDIT FACILITIES
The following table summarizes the carrying amount of our borrowings under various financing arrangements:

(in millions) |  | Carrying Amount
Type of Borrowing |  | Issue Date |  | Maturity Date |  | Interest Rate |  | March 31, 2024 |  | December 31, 2023
Senior Unsecured |  | March 2014 |  | April 2024 |  | 3.70% |  | $ | 1,750 |  |  | $ | 1,750 |
Senior Unsecured |  | November 2014 |  | February 2025 |  | 3.50% |  | 1,749 |  |  | 1,749 |
Senior Unsecured |  | September 2015 |  | March 2026 |  | 3.65% |  | 2,745 |  |  | 2,744 |
Senior Unsecured |  | September 2016 |  | March 2027 |  | 2.95% |  | 1,248 |  |  | 1,248 |
Senior Unsecured |  | September 2020 |  | October 2027 |  | 1.20% |  | 748 |  |  | 747 |
Senior Unsecured |  | September 2020 |  | October 2030 |  | 1.65% |  | 995 |  |  | 994 |
Senior Unsecured |  | September 2023 |  | October 2033 |  | 5.25% |  | 992 |  |  | 992 |
Senior Unsecured |  | September 2015 |  | September 2035 |  | 4.60% |  | 993 |  |  | 993 |
Senior Unsecured |  | September 2016 |  | September 2036 |  | 4.00% |  | 743 |  |  | 743 |
Senior Unsecured |  | September 2020 |  | October 2040 |  | 2.60% |  | 988 |  |  | 988 |
Senior Unsecured |  | December 2011 |  | December 2041 |  | 5.65% |  | 996 |  |  | 996 |
Senior Unsecured |  | March 2014 |  | April 2044 |  | 4.80% |  | 1,737 |  |  | 1,737 |
Senior Unsecured |  | November 2014 |  | February 2045 |  | 4.50% |  | 1,734 |  |  | 1,734 |
Senior Unsecured |  | September 2015 |  | March 2046 |  | 4.75% |  | 2,223 |  |  | 2,222 |
Senior Unsecured |  | September 2016 |  | March 2047 |  | 4.15% |  | 1,729 |  |  | 1,729 |
Senior Unsecured |  | September 2020 |  | October 2050 |  | 2.80% |  | 1,478 |  |  | 1,478 |
Senior Unsecured |  | September 2023 |  | October 2053 |  | 5.55% |  | 988 |  |  | 988 |
Total senior unsecured notes |  | 23,838 |  |  | 23,834 |
Liability related to future royalties |  | 1,157 |  |  | 1,153 |
Liability related to assumed financing arrangement |  | 199 |  |  | — |
Total debt, net |  | 25,193 |  |  | 24,987 |
Less: Current portion of long-term debt and other obligations, net |  | 3,667 |  |  | 1,798 |
Total Long-term debt, net |  | $ | 21,527 |  |  | $ | 23,189 |

Senior Unsecured Notes
We are required to comply with certain covenants under our note indentures governing our senior unsecured notes. As of March 31, 2024, we were not in violation of any covenants. In April 2024, we repaid $1.75 billion of senior unsecured notes due at maturity.
Revolving Credit Facility
As of March 31, 2024 and December 31, 2023, there were no amounts outstanding under our $2.5 billion revolving credit facility maturing in June 2025, and we were in compliance with all covenants.
20

10. COMMITMENTS AND CONTINGENCIES
Legal Proceedings
We are a party to various legal actions. Certain significant matters are described below. We recognize accruals for such actions to the extent that we conclude that a loss is both probable and reasonably estimable. We accrue for the best estimate of a loss within a range; however, if no estimate in the range is better than any other, then we accrue the minimum amount in the range. If we determine that a material loss is reasonably possible and the loss or range of loss can be estimated, we disclose the possible loss. Unless otherwise noted, the outcome of these matters either is not expected to be material or is not possible to determine such that we cannot reasonably estimate the maximum potential exposure or the range of possible loss. We did not have any material accruals for the matters described below on our Condensed Consolidated Balance Sheets as of March 31, 2024 and December 31, 2023.
Litigation Relating to Pre-Exposure Prophylaxis
In August 2019, we filed petitions requesting inter partes review of U.S. Patent Nos. 9,044,509, 9,579,333, 9,937,191 and 10,335,423 (collectively, “HHS Patents”) by the Patent Trial and Appeal Board (“PTAB”). The HHS Patents are assigned to the U.S. Department of Health and Human Services (“HHS”) and purport to claim a process of protecting a primate host from infection by an immunodeficiency retrovirus by administering a combination of FTC and tenofovir disoproxil fumarate (“TDF”) or TAF prior to exposure of the host to the immunodeficiency retrovirus, a process commonly known as pre-exposure prophylaxis (“PrEP”). In November 2019, the U.S. Department of Justice filed a lawsuit against us in the U.S. District Court of Delaware, alleging that the sale of Truvada and Descovy for use as PrEP infringes the HHS Patents. In February 2020, PTAB declined to institute our petitions for inter partes review of the HHS Patents. In April 2020, we filed a lawsuit against the U.S. federal government in the U.S. Court of Federal Claims (“CFC”), alleging breach of three material transfer agreements (“MTAs”) related to the research underlying the HHS Patents and two clinical trial agreements (“CTAs”) by the U.S. Centers for Disease Control and Prevention related to PrEP research. A trial for the bifurcated portion of the lawsuit in the CFC was held in June 2022, and in November 2022, the CFC determined that the government breached the MTAs. In January 2024, the CFC found the government liable for breach of both CTAs. A separate trial at the CFC to determine the damages we are owed based on the government’s breaches has been scheduled for December 2024. In May 2023, the District Court held a trial regarding the government’s patent infringement claims, and the jury rendered a full defense verdict in favor of Gilead, finding that the asserted claims of the HHS Patents are invalid and the HHS patents are not infringed. In March 2024, the District Court upheld the jury’s verdict that the government’s patents are invalid, denied the government’s request for a new trial and then entered final judgment. Although we cannot predict with certainty the ultimate outcome of each of these litigation matters, we believe that the U.S. federal government breached its contracts with Gilead, that Truvada and Descovy do not infringe the HHS Patents and that the HHS Patents are invalid over prior art descriptions of Truvada’s use for PrEP and post-exposure prophylaxis because physicians and patients were using the claimed methods years before HHS filed the applications for the patents.
Litigation with Generic Manufacturers
As part of the approval process for some of our products, FDA granted us a New Chemical Entity (“NCE”) exclusivity period during which other manufacturers’ applications for approval of generic versions of our products will not be approved. Generic manufacturers may challenge the patents protecting products that have been granted NCE exclusivity one year prior to the end of the NCE exclusivity period. Generic manufacturers have sought and may continue to seek FDA approval for a similar or identical drug through an abbreviated new drug application (“ANDA”), the application form typically used by manufacturers seeking approval of a generic drug. The sale of generic versions of our products prior to their patent expiration would have a significant negative effect on our revenues and results of operations. To seek approval for a generic version of a product having NCE status, a generic company may submit its ANDA to FDA four years after the branded product’s approval.
In October 2021, we received a letter from Lupin Ltd. (“Lupin”) indicating that it has submitted an ANDA to FDA requesting permission to market and manufacture a generic version of Symtuza, a product commercialized by Janssen and for which Gilead shares in revenues. In November 2021, we, along with Janssen and Janssen Products, L.P., filed a patent infringement lawsuit against Lupin as co-plaintiffs in the U.S. District Court of Delaware. In September 2022, we received a letter from Apotex Inc. and Apotex Corp. (“Apotex”) stating that they have submitted an ANDA for a generic version of Symtuza. In October 2022, we, along with Janssen and Janssen Products, L.P., filed a patent infringement lawsuit against Apotex as co-plaintiffs in the U.S. District Court of Delaware. The cases against Lupin and Apotex have been consolidated into a single trial scheduled for February 2025.
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Starting in March 2022, we received letters from Lupin, Laurus Labs (“Laurus”) and Cipla Ltd. (“Cipla”), indicating that they have submitted ANDAs to FDA requesting permission to market and manufacture generic versions of the adult dosage strength of Biktarvy. Lupin, Laurus, and Cipla have challenged the validity of four of the six patents listed in the Orange Book as associated with Biktarvy. We filed a lawsuit against Lupin, Laurus and Cipla in May 2022 in the U.S. District Court of Delaware, and intend to enforce and defend our intellectual property. Additionally, in November 2023, we received a letter from Cipla indicating that it has submitted an ANDA to FDA requesting permission to market and manufacture a generic version of the pediatric dosage strength of Biktarvy. Cipla challenged the validity of two of the patents listed in the Orange Book as associated with Biktarvy. We filed a separate lawsuit against Cipla in December 2023 in the U.S. District Court of Delaware. This lawsuit has been consolidated with the first lawsuit, with a single trial scheduled for October 2025.
In June 2023, we received a letter from Apotex indicating that it has submitted an ANDA to FDA requesting permission to market and manufacture a generic version of Genvoya. In July 2023, we filed a patent infringement lawsuit against Apotex in the U.S. District Court of Delaware, and intend to enforce and defend our intellectual property. This case has been consolidated with the Symtuza matters discussed above, and a trial has been scheduled for February 2025.
Antitrust and Consumer Protection
We, along with Bristol-Myers Squibb Company (“BMS”), Johnson & Johnson, Inc. (“Johnson & Johnson”), and Teva Pharmaceutical Industries Ltd. (“Teva”) have been named as defendants in class action lawsuits filed in 2019 and 2020 related to various drugs used to treat HIV, including drugs used in combination antiretroviral therapy. Plaintiffs allege that we (and the other defendants) engaged in various conduct to restrain competition in violation of federal and state antitrust laws and state consumer protection laws. The lawsuits, which have been consolidated, are pending in the U.S. District Court for the Northern District of California. The lawsuits seek to bring claims on behalf of direct purchasers consisting largely of wholesalers and indirect or end-payor purchasers, including health insurers and individual patients. Plaintiffs seek damages, permanent injunctive relief and other relief. In the second half of 2021 and first half of 2022, several plaintiffs consisting of retail pharmacies, individual health plans and United Healthcare, filed separate lawsuits effectively opting out of the class action cases, asserting claims that are substantively the same as the classes. These cases have been coordinated with the class actions. In March 2023, the District Court granted our motion to hold separate trials as to (i) the allegations against us and Teva seeking monetary damages relating to Truvada and Atripla (“Phase I”) and (ii) the allegations against us and, in part, Johnson & Johnson, seeking monetary damages and injunctive relief relating to Complera (“Phase II”). In May 2023, we settled claims with the direct purchaser class and the retailer opt-out plaintiffs for $525 million, which we paid in the second half of 2023. The settlement agreements are not an admission of liability or fault by us. In June 2023, the jury returned a complete verdict in Gilead’s favor on the remaining plaintiffs’ Phase I allegations. In November 2023, the court denied plaintiffs’ motion to set aside the verdict, and in February 2024, the court entered final judgment on the Phase I verdict and certain summary judgment rulings. In March 2024, plaintiffs filed notices of appeal of the Phase I verdict and those summary judgment rulings as to which the court entered final judgment. Trial on the Phase II claims has not yet been scheduled, and plaintiffs and the Phase I defendants have requested that the court stay Phase II pending any appeal of Phase I. While we intend to vigorously oppose the appeal and defend against the Phase II claims, we cannot predict the ultimate outcome. If plaintiffs are successful in their appeal or Phase II claims, we could be required to pay monetary damages or could be subject to permanent injunctive relief in favor of plaintiffs.
In January 2022, we, along with BMS and Janssen Products, L.P., were named as defendants in a lawsuit filed in the Superior Court of the State of California, County of San Mateo, by Aetna, Inc. on behalf of itself and its affiliates and subsidiaries that effectively opts the Aetna plaintiffs out of the above class actions. The allegations are substantively the same as those in the class actions. The Aetna plaintiffs seek damages, permanent injunctive relief and other relief. In September 2023, we filed a motion for judgment on the pleadings to preclude Aetna from re-litigating claims that were dismissed at summary judgment in the above class action cases. The court denied the motion, and we intend to file a writ of appeal with the California Court of Appeals. In March 2024, we filed a motion to bifurcate the case to adjudicate the issue of preclusion before litigating the merits of the case, which the court granted in April 2024.
In September 2020, we, along with generic manufacturers Cipla and Cipla USA Inc. (together, “Cipla Defendants”), were named as defendants in a class action lawsuit filed in the U.S. District Court for the Northern District of California by Jacksonville Police Officers and Fire Fighters Health Insurance Trust (“Jacksonville Trust”) on behalf of end-payor purchasers. Jacksonville Trust claims that the 2014 settlement agreement between us and the Cipla Defendants, which settled a patent dispute relating to patents covering our Emtriva, Truvada and Atripla products and permitted generic entry prior to patent expiry, violates certain federal and state antitrust and consumer protection laws. Plaintiffs sought damages, permanent injunctive relief and other relief. The lawsuit was resolved in January 2024 on confidential terms, and the case was dismissed in March 2024.
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In February 2021, we, along with BMS and Teva, were named as defendants in a lawsuit filed in the First Judicial District Court for the State of New Mexico, County of Santa Fe by the New Mexico Attorney General. The New Mexico Attorney General alleges that we (and the other defendants) restrained competition in violation of New Mexico antitrust and consumer protection laws. The New Mexico Attorney General seeks damages, permanent injunctive relief and other relief. We moved to dismiss the case based on lack of personal jurisdiction and, in July 2023, the New Mexico Supreme Court remanded the case back to the trial court for limited jurisdictional discovery.
We intend to vigorously defend ourselves in these actions, however, we cannot predict the ultimate outcome. If plaintiffs are successful in their claims, we could be required to pay significant monetary damages or could be subject to permanent injunctive relief awarded in favor of plaintiffs, which may result in a material, adverse effect on our results of operations and financial condition, including in a particular reporting period in which any such outcome becomes probable and estimable.
Product Liability
We have been named as a defendant in one class action lawsuit and various product liability lawsuits related to Viread, Truvada, Atripla, Complera and Stribild. Plaintiffs allege that Viread, Truvada, Atripla, Complera and/or Stribild caused them to experience kidney, bone and/or tooth injuries. The lawsuits, which are pending in state or federal court in California and Missouri, involve approximately 25,000 active plaintiffs. Plaintiffs in these cases seek damages and other relief on various grounds for alleged personal injury and economic loss. The first bellwether trial in California state court was scheduled to begin in October 2022, but is currently stayed pending the conclusion of appellate proceedings in the California Supreme Court. The first bellwether trial in California federal court is scheduled to begin in November 2024. We intend to vigorously defend ourselves in these actions, however, we cannot predict the ultimate outcome. If plaintiffs are successful in their claims, we could be required to pay significant monetary damages, which may result in a material, adverse effect on our results of operations and financial condition, including in a particular reporting period in which any such outcome becomes probable and estimable.
Government Investigation
In 2017, we received a subpoena from the U.S. Attorney’s Office for the Southern District of New York requesting documents related to our promotional speaker programs for HIV. We are cooperating with this inquiry.
Qui Tam Litigation
A former sales employee filed a qui tam lawsuit against Gilead in March 2017 in U.S. District Court for the Eastern District of Pennsylvania. Following the government’s decision not to intervene in the suit, the case was unsealed in December 2020. The lawsuit alleges that certain of Gilead’s HCV sales and marketing activities violated the federal False Claims Act and various state false claims acts. The lawsuit seeks all available relief under these statutes.
Health Choice Advocates, LLC (“Health Choice”) filed a qui tam lawsuit against Gilead in April 2020 in New Jersey state court. Following the New Jersey Attorney General’s Office’s decision not to intervene in the suit, Health Choice served us with their original complaint in August 2020. The lawsuit alleges that Gilead violated the New Jersey False Claims Act through our clinical educator programs for Sovaldi and Harvoni and our HCV and HIV patient access programs. The lawsuit seeks all available relief under the New Jersey False Claims Act. In April 2021, the trial court granted our motion to dismiss with prejudice. Health Choice appealed, and in March 2024, the New Jersey Appellate Division affirmed the trial court dismissal.
Health Choice filed another qui tam lawsuit against Gilead in May 2020 making similar allegations in Texas state court. The lawsuit alleged that Gilead violated the Texas Medicare Fraud Prevention Act (“TMFPA”) through our clinical educator programs for Sovaldi and Harvoni and our HCV and HIV patient access programs. The lawsuit sought all available relief under the TMFPA. Health Choice voluntarily dismissed the case without prejudice in August 2023, and commenced a new action in October 2023, asserting largely identical allegations and claims. In the newly filed action, the Texas Attorney General has intervened as a plaintiff.
We intend to vigorously defend ourselves in these actions, however, we cannot predict the ultimate outcomes. If any of these plaintiffs are successful in their claims, we could be required to pay significant monetary damages, which may result in a material, adverse effect on our results of operations and financial condition, including in a particular reporting period in which any such outcome becomes probable and estimable.
Other Matters
We are a party to various legal actions that arose in the ordinary course of our business. We do not believe that it is probable or reasonably possible that these other legal actions will have a material adverse impact on our consolidated financial position, results of operations or cash flows.
23

11. EARNINGS (LOSS) PER SHARE
The following table shows the calculation of basic and diluted (loss) earnings per share attributable to Gilead:

|  | Three Months Ended |  |
|  | March 31, |  |
(in millions, except per share amounts) |  | 2024 |  | 2023 |  |  |  |
Net (loss) income attributable to Gilead |  | $ | (4,170) |  |  | $ | 1,010 |  |  |  |  |
Shares used in basic (loss) earnings per share attributable to Gilead calculation |  | 1,247 |  |  | 1,248 |  |  |  |  |
Dilutive effect of stock options and equivalents |  | — |  |  | 13 |  |  |  |  |
Shares used in diluted (loss) earnings per share attributable to Gilead calculation |  | 1,247 |  |  | 1,261 |  |  |  |  |
Basic (loss) earnings per share attributable to Gilead |  | $ | (3.34) |  |  | $ | 0.81 |  |  |  |  |
Diluted (loss) earnings per share attributable to Gilead |  | $ | (3.34) |  |  | $ | 0.80 |  |  |  |  |

Potential shares of common stock excluded from the computation of diluted (loss) earnings per share attributable to Gilead because their effect would have been antidilutive were 13 million and 3 million for the three months ended March 31, 2024, and 2023, respectively.
12. INCOME TAXES
The following table summarizes our Income tax (benefit) expense:

|  | Three Months Ended |  |
|  | March 31, |  |
(in millions, except percentages) |  | 2024 |  | 2023 |  |  |  |
(Loss) income before income taxes |  | $ | (4,486) |  |  | $ | 1,300 |  |  |  |  |
Income tax (benefit) expense |  | $ | (315) |  |  | $ | 316 |  |  |  |  |
Effective tax rate |  | 7.0 | % |  | 24.3 | % |  |  |  |

Our effective income tax rate of 7.0% for the three months ended March 31, 2024 differed from the U.S. federal statutory rate of 21% primarily due to $3.9 billion of non-deductible acquired IPR&D expense recorded in connection with our acquisition of CymaBay, partially offset by a decrease in state deferred tax liabilities associated with the $2.4 billion NSCLC IPR&D intangible asset impairment charge and settlements with tax authorities.
Our effective income tax rate of 24.3% for the three months ended March 31, 2023 differed from the U.S. federal statutory rate of 21% primarily due to $244 million of non-deductible acquired IPR&D expense recorded in connection with our acquisition of Tmunity.
Our income tax returns are subject to audit by federal, state and foreign tax authorities. We are currently under examination by the Internal Revenue Service for our 2019 to 2021 tax years. There are differing interpretations of tax laws and regulations, and as a result, significant disputes may arise with these tax authorities involving issues on the timing and amount of deductions and allocations of income among various tax jurisdictions. We periodically evaluate our exposures associated with our tax filing positions.
During the three months ended March 31, 2024, our unrecognized tax benefits balance as of December 31, 2023 decreased by approximately $400 million. This reduction was due to the conclusion of a tax audit.
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Item 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
The following discussion and analysis is intended to provide material information around events and uncertainties known to management that are relevant to an assessment of the financial condition and results of operations of Gilead and should therefore be read in conjunction with our audited Consolidated Financial Statements and the related notes thereto and other disclosures included as part of our Annual Report on Form 10-K for the year ended December 31, 2023 and our unaudited Condensed Consolidated Financial Statements for the three months ended March 31, 2024 and the related notes thereto and other disclosures (including the disclosures under Part II, Item 1A. Risk Factors) included in this Quarterly Report on Form 10-Q.
Management Overview
Gilead Sciences, Inc. (including its consolidated subsidiaries, referred to as “Gilead,” the “company,” “we,” “our” or “us”) is a biopharmaceutical company that has pursued and achieved breakthroughs in medicine for more than three decades, with the goal of creating a healthier world for all people. We are committed to advancing innovative medicines to prevent and treat life-threatening diseases, including HIV, viral hepatitis, coronavirus disease 2019 (“COVID-19”) and cancer. We operate in more than 35 countries worldwide, with headquarters in Foster City, California.
Key Business Updates
The following updates are based on select press releases issued since the filing of our Annual Report on Form 10-K for the year ended December 31, 2023. Readers are encouraged to review all press releases available on our website at www.gilead.com. The content on the referenced website does not constitute a part of and is not incorporated by reference into this Quarterly Report on Form 10-Q.
Virology
•Received approval from the U.S. Food and Drug Administration (“FDA”) to update Biktarvy’s label with additional data reinforcing the safety and efficacy profile to treat pregnant people with HIV-1 with suppressed viral loads.
•Received approval from FDA to expand Biktarvy’s label to include treatment of people with HIV who have suppressed viral loads with known or suspected M184V/I resistance.
•Received approval from FDA to expand the indication for Vemlidy to include treatment of chronic hepatitis B virus (“HBV”) in children six years and older who weigh at least 25 kg with compensated liver disease.
Oncology
•Announced a research collaboration, option and license agreement with Merus N.V. to discover novel antibody-based trispecific T-cell engagers in oncology.
•Entered into an exclusive license agreement with Xilio Therapeutics, Inc. (“Xilio”) to develop and commercialize Xilio’s tumor-activated IL-12 program, including investigational candidate XTX301 in advanced solid tumors.
Inflammation
•Completed the acquisition of CymaBay Therapeutics, Inc. (“CymaBay”), for $4.3 billion in total equity value, or $3.9 billion net cash paid, adding investigational candidate seladelpar for the treatment of primary biliary cholangitis to Gilead’s Liver Disease portfolio. Seladelpar is an investigational, oral, selective peroxisome proliferator-activated receptor delta (PPARδ) agonist with Orphan Drug Designation in the United States and Europe. PPARδ has been shown to regulate critical metabolic and liver disease pathways. FDA accepted the New Drug Application for seladelpar in February 2024 for priority review, with a Prescription Drug User Fee Act target action date of August 14, 2024.
Key Financial Results

|  | Three Months Ended |  |  |  |  |  |
|  | March 31, |  |  |  |  |  |
(in millions, except percentages and per share amounts) |  | 2024 |  | 2023 |  | Change |  |  |  |  |  |
Total revenues |  | $ | 6,686 |  |  | $ | 6,352 |  |  | 5 | % |  |  |  |  |  |
Net (loss) income attributable to Gilead |  | $ | (4,170) |  |  | $ | 1,010 |  |  | NM |  |  |  |  |  |
Diluted (loss) earnings per share attributable to Gilead |  | $ | (3.34) |  |  | $ | 0.80 |  |  | NM |  |  |  |  |  |

_______________________________
NM - Not Meaningful
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Total revenues increased 5% to $6.7 billion for the three months ended March 31, 2024, compared to the same period in 2023, primarily due to higher HIV, Oncology and Liver Disease sales.
Net loss attributable to Gilead was $4.2 billion and diluted loss per share attributable to Gilead was $3.34 for the three months ended March 31, 2024, compared to net income attributable to Gilead of $1.0 billion and diluted earnings per share attributable to Gilead of $0.80 for the same period in 2023. The decrease was primarily driven by an acquired in-process research and development (“IPR&D”) charge of $3.9 billion related to the acquisition of CymaBay, as well as a pre-tax IPR&D partial impairment charge of $2.4 billion related to assets acquired by Gilead from Immunomedics, Inc. (“Immunomedics”) in 2020.
Results of Operations
Revenues
The following table summarizes the period-over-period changes in our Total revenues:

|  | Three Months Ended March 31, 2024 |  | Three Months Ended March 31, 2023 |  |
(in millions) |  | U.S. |  | Europe |  | Rest of World |  | Total |  | U.S. |  | Europe |  | Rest of World |  | Total |  | Change
Product sales: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
HIV |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Biktarvy |  | $ | 2,315 |  |  | $ | 365 |  |  | $ | 265 |  |  | $ | 2,946 |  |  | $ | 2,161 |  |  | $ | 304 |  |  | $ | 212 |  |  | $ | 2,677 |  |  | 10 | %
Descovy |  | 371 |  |  | 26 |  |  | 29 |  |  | 426 |  |  | 395 |  |  | 25 |  |  | 29 |  |  | 449 |  |  | (5) | %
Genvoya |  | 332 |  |  | 49 |  |  | 21 |  |  | 403 |  |  | 417 |  |  | 55 |  |  | 29 |  |  | 501 |  |  | (20) | %
Odefsey |  | 223 |  |  | 76 |  |  | 11 |  |  | 310 |  |  | 230 |  |  | 76 |  |  | 11 |  |  | 317 |  |  | (2) | %
Symtuza - Revenue share(1) |  | 104 |  |  | 33 |  |  | 3 |  |  | 141 |  |  | 98 |  |  | 36 |  |  | 4 |  |  | 138 |  |  | 2 | %
Other HIV(2) |  | 60 |  |  | 45 |  |  | 12 |  |  | 117 |  |  | 62 |  |  | 32 |  |  | 13 |  |  | 108 |  |  | 9 | %
Total HIV |  | 3,405 |  |  | 596 |  |  | 342 |  |  | 4,342 |  |  | 3,364 |  |  | 528 |  |  | 298 |  |  | 4,190 |  |  | 4 | %
Liver Disease |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Sofosbuvir/Velpatasvir(3) |  | 248 |  |  | 79 |  |  | 78 |  |  | 405 |  |  | 204 |  |  | 90 |  |  | 90 |  |  | 385 |  |  | 5 | %
Vemlidy |  | 95 |  |  | 11 |  |  | 119 |  |  | 225 |  |  | 87 |  |  | 9 |  |  | 103 |  |  | 199 |  |  | 13 | %
Other Liver Disease(4) |  | 42 |  |  | 47 |  |  | 19 |  |  | 107 |  |  | 27 |  |  | 41 |  |  | 23 |  |  | 91 |  |  | 18 | %
Total Liver Disease |  | 385 |  |  | 137 |  |  | 215 |  |  | 737 |  |  | 318 |  |  | 140 |  |  | 217 |  |  | 675 |  |  | 9 | %
Veklury |  | 315 |  |  | 70 |  |  | 169 |  |  | 555 |  |  | 252 |  |  | 111 |  |  | 209 |  |  | 573 |  |  | (3) | %
Oncology |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cell Therapy |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Tecartus |  | 55 |  |  | 36 |  |  | 8 |  |  | 100 |  |  | 59 |  |  | 27 |  |  | 3 |  |  | 89 |  |  | 13 | %
Yescarta |  | 170 |  |  | 158 |  |  | 52 |  |  | 380 |  |  | 210 |  |  | 121 |  |  | 28 |  |  | 359 |  |  | 6 | %
Total Cell Therapy |  | 225 |  |  | 195 |  |  | 60 |  |  | 480 |  |  | 269 |  |  | 148 |  |  | 31 |  |  | 448 |  |  | 7 | %
Trodelvy |  | 206 |  |  | 68 |  |  | 36 |  |  | 309 |  |  | 162 |  |  | 54 |  |  | 6 |  |  | 222 |  |  | 39 | %
Total Oncology |  | 431 |  |  | 262 |  |  | 96 |  |  | 789 |  |  | 431 |  |  | 202 |  |  | 37 |  |  | 670 |  |  | 18 | %
Other |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
AmBisome |  | 14 |  |  | 70 |  |  | 60 |  |  | 144 |  |  | 6 |  |  | 60 |  |  | 49 |  |  | 116 |  |  | 24 | %
Other(5) |  | 59 |  |  | 9 |  |  | 12 |  |  | 80 |  |  | 62 |  |  | 12 |  |  | 9 |  |  | 83 |  |  | (4) | %
Total Other |  | 73 |  |  | 79 |  |  | 71 |  |  | 224 |  |  | 69 |  |  | 72 |  |  | 58 |  |  | 199 |  |  | 13 | %
Total product sales |  | 4,609 |  |  | 1,144 |  |  | 894 |  |  | 6,647 |  |  | 4,434 |  |  | 1,053 |  |  | 819 |  |  | 6,306 |  |  | 5 | %
Royalty, contract and other revenues |  | 23 |  |  | 15 |  |  | 1 |  |  | 39 |  |  | 18 |  |  | 26 |  |  | 2 |  |  | 46 |  |  | (15) | %
Total revenues |  | $ | 4,633 |  |  | $ | 1,159 |  |  | $ | 894 |  |  | $ | 6,686 |  |  | $ | 4,452 |  |  | $ | 1,079 |  |  | $ | 821 |  |  | $ | 6,352 |  |  | 5 | %

_______________________________
(1) Represents our revenue from cobicistat (“C”), emtricitabine (“FTC”) and tenofovir alafenamide (“TAF”) in Symtuza (darunavir/C/FTC/TAF), a fixed dose combination product commercialized by Janssen Sciences Ireland Unlimited Company (“Janssen”).
(2) Includes Atripla, Complera/Eviplera, Emtriva, Sunlenca, Stribild, Truvada and Tybost.
(3) Includes Epclusa and the authorized generic version of Epclusa sold by Gilead’s separate subsidiary, Asegua Therapeutics LLC (“Asegua”).
(4) Includes ledipasvir/sofosbuvir (Harvoni and the authorized generic version of Harvoni sold by Asegua), Hepcludex, Hepsera, Sovaldi, Viread and Vosevi.
(5) Includes Cayston, Jyseleca, Letairis, Ranexa and Zydelig.
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HIV
HIV product sales increased 4% to $4.3 billion for the three months ended March 31, 2024, compared to the same period in 2023, primarily driven by higher demand. In particular, Biktarvy sales increased primarily reflecting higher demand, including patients switching from Genvoya and other Gilead HIV products. Descovy sales decreased primarily driven by lower average realized price due to channel mix, partially offset by higher demand.
Liver Disease
Liver Disease product sales increased 9% to $737 million for the three months ended March 31, 2024, compared to the same period in 2023, primarily driven by favorable inventory dynamics, the timing of chronic hepatitis C virus (“HCV”) product purchases by the Department of Corrections in the United States, as well as higher demand across HBV, HCV, and in the European Union (“EU”), chronic hepatitis D virus (“HDV”) products.
Veklury
Veklury product sales decreased 3% to $555 million for the three months ended March 31, 2024, compared to the same period in 2023, primarily driven by lower rates of COVID-19 related hospitalizations.
Oncology
Cell Therapy
Cell Therapy product sales increased 7% to $480 million for the three months ended March 31, 2024, compared to the same period in 2023, primarily due to increased Yescarta demand for the treatment of relapsed or refractory (“R/R”) large B-cell lymphoma outside the United States and increased Tecartus demand for the treatment of R/R adult acute lymphoblastic leukemia and R/R mantle cell lymphoma, mostly in Europe.
Trodelvy
Trodelvy product sales increased 39% to $309 million for the three months ended March 31, 2024, compared to the same period in 2023, primarily due to higher demand.
Other
Other product sales increased 13% to $224 million for the three months ended March 31, 2024, compared to the same period in 2023, primarily due to higher demand for AmBisome.
Foreign Currency Exchange Impact
We generally face exposure to movements in foreign currency exchange rates, primarily in the Euro. We use foreign currency exchange contracts to hedge a portion of our foreign currency exposures.
Approximat ely 28% of our product sales were denominated in foreign currencies during the three months ended March 31, 2024 and 2023. Foreign currency exchange, net of hedges, had an unfavorable impact on our total product sales of $47 million for the three months ended March 31, 2024, based on a comparison using foreign currency exchange rates from the three months ended March 31, 2023.
Costs and Expenses
The following table summarizes the period-over-period changes in our costs and expenses:

|  | Three Months Ended |  |  |  |  |  |
|  | March 31, |  |  |  |  |  |
(in millions, except percentages) |  | 2024 |  | 2023 |  | Change |  |  |  |  |  |
Cost of goods sold |  | $ | 1,552 |  |  | $ | 1,401 |  |  | 11 | % |  |  |  |  |  |
Product gross margin |  | 76.6 | % |  | 77.8 | % |  | -114 bps |  |  |  |  |  |
Research and development expenses |  | $ | 1,520 |  |  | $ | 1,447 |  |  | 5 | % |  |  |  |  |  |
Acquired in-process research and development expenses |  | $ | 4,131 |  |  | $ | 481 |  |  | NM |  |  |  |  |  |
In-process research and development impairment |  | $ | 2,430 |  |  | $ | — |  |  | NM |  |  |  |  |  |
Selling, general and administrative expenses |  | $ | 1,375 |  |  | $ | 1,319 |  |  | 4 | % |  |  |  |  |  |

_______________________________
NM - Not Meaningful
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Product Gross Margin
Product gross margin decreased to 76.6% for the three months ended March 31, 2024, compared to the same period in 2023, primarily driven by product mix, as well as higher intangible asset amortization expenses related to the pretreated hormone receptor-positive, human epidermal growth factor receptor 2-negative (“HR+/HER2-”) metastatic breast cancer indication for Trodelvy following its approval in February 2023.
Research and Development Expenses
Research and development (“R&D”) expenses consist primarily of personnel costs including salaries, benefits and stock-based compensation expense, infrastructure, materials and supplies and other support costs, research and clinical studies performed by contract research organizations and our collaboration partners and other outside services.
We manage our R&D expenses by identifying the R&D activities we expect to be performed during a given period and then prioritizing efforts based on scientific data, probability of successful technical development and regulatory approval, market potential, available human and capital resources and other considerations. We regularly review our R&D activities based on unmet medical need and, as necessary, reallocate resources among our internal R&D portfolio and external opportunities that we believe will best support the long-term growth of our business. We do not track total R&D expenses by product candidate, therapeutic area or development phase.
The following table provides a breakout of expenses by major cost type:

|  | Three Months Ended |  |
|  | March 31, |  |
(in millions) |  | 2024 |  | 2023 |  |  |  |
Personnel, infrastructure and other support costs |  | $ | 963 |  |  | $ | 817 |  |  |  |  |
Clinical studies and other costs |  | 557 |  |  | 629 |  |  |  |  |
Total |  | $ | 1,520 |  |  | $ | 1,447 |  |  |  |  |

Research and development expenses increased 5% to $1.5 billion for the three months ended March 31, 2024, compared to the same period in 2023. Personnel, infrastructure and other support costs increased primarily due to stock-based compensation expenses related to the acquisition of CymaBay and restructuring expenses. Clinical studies and other costs decreased primarily due to higher R&D reimbursements and the discontinuation or ramp-down of magrolimab and other studies.
Acquired In-Process Research and Development Expenses
Acquired in-process research and development expenses are recorded when incurred and reflect costs of externally-developed IPR&D projects, acquired directly in a transaction other than a business combination, that do not have an alternative future use, including upfront and milestone payments related to various collaborations and the costs of rights to IPR&D projects.
Acquired in-process research and development expenses were $4.1 billion for the three months ended March 31, 2024, primarily comprised of $3.9 billion related to the CymaBay acquisition and $100 million related to the Arcus Biosciences, Inc. collaboration. Acquired in-process research and development expenses were $481 million for the three months ended March 31, 2023, primarily comprised of $244 million related to the Tmunity Therapeutics, Inc. acquisition and $212 million related to the Arcellx, Inc. collaboration. See Note 6. Acquisitions, Collaborations and Other Arrangements of the Notes to Condensed Consolidated Financial Statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q for additional information.
In-Process Research and Development Impairment
As of December 31, 2023, approximately $5.9 billion was assigned to an indefinite-lived IPR&D intangible asset related to Trodelvy for metastatic non-small cell lung cancer (“NSCLC”). In addition to NSCLC, Trodelvy is being explored for potential investigational use in a range of tumor types where Trop-2 is highly expressed. Gilead’s clinical development program in metastatic NSCLC includes ongoing Phase 2 and registrational Phase 3 studies for Trodelvy as a first- or second-line indication.
In January 2024, we received data from our Phase 3 EVOKE-01 study of Trodelvy evaluating sacituzumab govitecan-hziy (“SG”) indicating that the study did not meet its primary endpoint of overall survival in previously treated metastatic NSCLC, thus triggering a review for potential impairment of the NSCLC IPR&D impairment asset.
Based on our evaluation of the study results and all other data currently available, and in connection with the preparation of the financial statements for the first quarter, we performed an interim impairment test and determined that the revised estimated fair value of the NSCLC IPR&D intangible asset was below its carrying value. As a result, we recognized a partial impairment charge of $2.4 billion in In-process research and development impairment on our Condensed Consolidated Statements of Operations for the three months ended March 31, 2024.
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To arrive at the revised estimated fair value, we used a probability-weighted income approach that discounts expected future cash flows to present value, which requires the use of Level 3 fair value measurements and inputs, and requires the use of critical estimated inputs, including: revenues and operating profits related to the planned utilization of SG in NSCLC, which, include inputs such as addressable patient population, projected market share, treatment duration, and the life of the potential commercialized product; the probability of technical and regulatory success; the time and resources needed to complete the development and approval of SG in NSCLC; an appropriate discount rate based on the estimated weighted-average cost of capital for companies with profiles similar to our profile; and risks related to the viability of and potential alternative treatments in any future target markets. Our revised discounted cash flows primarily reflect the smaller addressable market that Trodelvy could serve among metastatic NSCLC patients and a delay in expected launch timing for second-line plus patients. The revised estimated fair value of the NSCLC IPR&D intangible asset was $3.5 billion as of March 31, 2024.
If future events result in adverse changes in the key assumptions used in determining fair value, including the timing of product launches, information on the competitive landscape of treatments in this indication, changes to the probability of technical or regulatory success, failure to obtain anticipated regulatory approval or discount rate, among others, additional impairments may be recorded and could be material to our financial statements.
No IPR&D impairment charges were recorded during the three months ended March 31, 2023.
Selling, General and Administrative Expenses
Selling, general and administrative expenses are recorded when incurred and consist primarily of personnel costs, facilities and overhead costs, outside marketing, advertising and legal expenses, and other general and administrative costs related to sales and marketing, finance, human resources, legal and other administrative activities.
Selling, general and administrative expenses increased 4% to $1.4 billion for the three months ended March 31, 2024, compared to the same period in 2023, primarily due to stock-based compensation expenses related to the acquisition of CymaBay and restructuring expenses.
Interest Expense and Other Income (Expense), Net
The following table summarizes the period-over-period changes in Interest expense and Other (income) expense, net:

|  | Three Months Ended |  |  |  |  |  |
|  | March 31, |  |  |  |  |  |
(in millions, except percentages) |  | 2024 |  | 2023 |  | Change |  |  |  |  |  |
Interest expense |  | $ | 254 |  |  | $ | 230 |  |  | 11 | % |  |  |  |  |  |
Other (income) expense, net |  | $ | (91) |  |  | $ | 174 |  |  | NM |  |  |  |  |  |

_______________________________
NM - Not Meaningful
Interest expense increased 11% to $254 million for the three months ended March 31, 2024, compared to the same period in 2023 due to a higher average interest rate on long-term debt. See Note 9. Debt and Credit Facilities of the Notes to Condensed Consolidated Financial Statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q for additional information on our long-term debt and related interest rates.
Other (income) expense, net for the three months ended March 31, 2024 primarily included $108 million of interest income, partially offset by $14 million of net unrealized losses on equity investments. Other (income) expense, net for the three months ended March 31, 2023 primarily included $256 million of net unrealized losses on equity investments, partially offset by $78 million of interest income.
Income Taxes
The following table summarizes the period-over-period changes in Income tax (benefit) expense:

|  | Three Months Ended |  |  |  |  |  |
|  | March 31, |  |  |  |  |  |
(in millions, except percentages) |  | 2024 |  | 2023 |  | Change |  |  |  |  |  |
(Loss) income before income taxes |  | $ | (4,486) |  |  | $ | 1,300 |  |  | $ | (5,786) |  |  |  |  |  |  |
Income tax (benefit) expense |  | $ | (315) |  |  | $ | 316 |  |  | $ | (631) |  |  |  |  |  |  |
Effective tax rate |  | 7.0 | % |  | 24.3 | % |  | (17.3) | % |  |  |  |  |  |

Our effective tax rate decreased for the three months ended March 31, 2024, compared to the same period in 2023, primarily due to the non-deductible acquired IPR&D expense recorded in connection with our first quarter 2024 acquisition of CymaBay.
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Liquidity and Capital Resources
We regularly evaluate our liquidity and capital resources, including our access to external capital, so that we can adequately and efficiently finance our operations.
Liquidity
Cash, cash equivalents and marketable debt securities were $4.7 billion and $8.4 billion as of March 31, 2024 and December 31, 2023, respectively. Cash and cash equivalents decreased by $1.4 billion from December 31, 2023 to March 31, 2024. The following table summarizes our cash flow activities:

|  | Three Months Ended
|  | March 31,
(in millions) |  | 2024 |  | 2023
Net cash provided by (used in): |  |  |  |
Operating activities |  | $ | 2,219 |  |  | $ | 1,744 |
Investing activities |  | $ | (2,207) |  |  | $ | (826) |
Financing activities |  | $ | (1,361) |  |  | $ | (1,406) |
Effect of exchange rate changes on cash and cash equivalents |  | $ | (18) |  |  | $ | 13 |

Operating Activities
Net cash provided by operating activities was $2.2 billion for the three months ended March 31, 2024, compared to $1.7 billion for the same period in 2023. The change was primarily due to lower rebate payments, mostly due to timing, as well as lower inventory spend, partially offset by lower collections.
Investing Activities
Net cash used in investing activities was $2.2 billion for the three months ended March 31, 2024, compared to $826 million for the same period in 2023. The change was primarily due to the $3.9 billion net cash payment for the CymaBay acquisition, partially offset by proceeds from liquidation of marketable debt securities to fund the acquisition.
Financing Activities
Net cash used in financing activities was $1.4 billion for the three months ended March 31, 2024 and 2023. During the three months ended March 31, 2024, we utilized cash of $990 million for dividend payments and $400 million for common stock repurchases. During the three months ended March 31, 2023, we utilized cash of $969 million for dividend payments and $400 million for common stock repurchases.
Capital Resources and Material Cash Requirements
A summary of our capital resources and material cash requirements is presented in Part II, Item 7 of our Annual Report on Form 10-K for the year ended December 31, 2023. Other than as disclosed in Notes 4. Available-For-Sale Debt Securities and Equity Securities, 6. Acquisitions, Collaborations and Other Arrangements, 9. Debt and Credit Facilities, 10. Commitments and Contingencies and 12. Income Taxes of the Notes to Condensed Consolidated Financial Statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q, there were no material changes to our capital resources and material cash requirements during the three months ended March 31, 2024.
Subsequently, in April 2024, we repaid $1.75 billion of senior unsecured notes due at maturity and made a scheduled $1.2 billion federal income tax payment for transition tax on the mandatory deemed repatriation of foreign earnings from the Tax Cuts and Jobs Act.
Critical Accounting Estimates
A summary of our critical accounting estimates is presented in Part II, Item 7 of our Annual Report on Form 10-K for the year ended December 31, 2023. Other than as disclosed in Notes 2. Revenues, 7. Intangible Assets, 10. Commitments and Contingencies and 12. Income Taxes of the Notes to Condensed Consolidated Financial Statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q, there were no material changes to our critical accounting estimates during the three months ended March 31, 2024.
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Item 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK
Information about our market risk is presented in Part II, Item 7A of our Annual Report on Form 10-K for the year ended December 31, 2023. Other than as disclosed in Notes 3. Fair Value Measurements, 4. Available-For-Sale Debt Securities and Equity Securities, 5. Derivative Financial Instruments and 9. Debt and Credit Facilities of the Notes to Condensed Consolidated Financial Statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q, there were no material changes to these disclosures.
Item 4. CONTROLS AND PROCEDURES
Evaluation of Disclosure Controls and Procedures
An evaluation as of March 31, 2024 was carried out under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of our “disclosure controls and procedures,” which are defined in Rule 13a-15(e) under the U.S. Securities Exchange Act of 1934, as amended (the “Exchange Act”), as controls and other procedures of a company that are designed to ensure that the information required to be disclosed by a company in the reports that it files or submits under the Exchange Act is recorded, processed, summarized and reported, within the time periods specified in U.S. Securities and Exchange Commission’s rules and forms, and that such information is accumulated and communicated to our management, including our Chief Executive Officer and Chief Financial Officer, as appropriate, to allow timely decisions regarding required disclosure. Based upon that evaluation, our Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures were effective as of March 31, 2024.
Changes in Internal Control over Financial Reporting
Our management, including our Chief Executive Officer and Chief Financial Officer, has evaluated any changes in our internal control over financial reporting during the quarter ended March 31, 2024, to identify any change that has materially affected, or is reasonably likely to materially affect, our internal control over financial reporting. In August 2023, we began deploying a new enterprise resource planning system (“ERP”) as well as other related systems. We have made changes to our internal control over financial reporting to address the related processes and systems. We will continue to evaluate any further changes in our internal control over financial reporting over the course of the implementation of the new ERP and other related systems, which is scheduled to occur in phases over the next few years.
Limitations on the Effectiveness of Controls
A control system, no matter how well conceived and operated, can provide only reasonable, not absolute, assurance that the objectives of the control system are met. Because of inherent limitations in all control systems, no evaluation of controls can provide absolute assurance that all control issues, if any, within a company have been detected. Accordingly, our disclosure controls and procedures are designed to provide reasonable, not absolute, assurance that the objectives of our disclosure control system are met and, as set forth above, our Chief Executive Officer and Chief Financial Officer have concluded, based on their evaluation as of the end of the period covered by this report, that our disclosure controls and procedures were effective to provide reasonable assurance that the objectives of our disclosure control system were met.
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PART II. OTHER INFORMATION
Item 1. LEGAL PROCEEDINGS
For a description of our significant pending legal proceedings, please see Note 10. Commitments and Contingencies of the Notes to Condensed Consolidated Financial Statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.
Item 1A. RISK FACTORS
In evaluating our business, you should carefully consider the following discussion of material risks, events and uncertainties that make an investment in us speculative or risky in addition to the other information in this Quarterly Report on Form 10-Q. A manifestation of any of the following risks and uncertainties could, in circumstances we may or may not be able to accurately predict, materially and adversely affect our business and operations, growth, reputation (including the commercial or scientific reputation of our products), prospects, product pipeline and sales, operating and financial results, financial condition, cash flows, liquidity and stock price. We note these factors for investors as permitted by the Private Securities Litigation Reform Act of 1995. It is not possible to predict or identify all such factors; our operations could also be affected by factors, events or uncertainties that are not presently known to us or that we currently do not consider to present significant risks to our operations. Therefore, you should not consider the following risks to be a complete statement of all the potential risks or uncertainties that we face.
Product and Commercialization Risks
Certain of our products subject us to additional or heightened risks.
HIV
We receive a substantial portion of our revenue from sales of our products for the treatment and prevention of HIV infection. During the three months ended March 31, 2024, sales of our HIV products accounted for approximately 65% of our total product sales. We may be unable to sustain or increase sales of our HIV products for any number of reasons, including market share gains by competitive products, including generics, or the inability to introduce new HIV medications necessary to remain competitive. In such case, we may need to scale back our operations, including our future drug development and spending on research and development (“R&D”) efforts. For example, many of our HIV products contain tenofovir alafenamide (“TAF”), which belongs to the nucleoside class of antiviral therapeutics. If there are any changes to the treatment or prevention paradigm for HIV, and nucleoside-based therapeutics do not remain the preferred regimen, our HIV product sales would be adversely impacted.
Veklury
We face risks related to our supply and sale of Veklury, which was approved by U.S. Food and Drug Administration (“FDA”) as a treatment for patients with coronavirus disease 2019 (“COVID-19”). Veklury sales generally reflect COVID-19 related rates and severity of infections and hospitalizations, as well as the availability, uptake and effectiveness of vaccines and alternative treatments for COVID-19. In May 2023, the World Health Organization declared the end of COVID-19 as a public health emergency of international concern. Future sales of Veklury in the short- and long-term remain uncertain. If we do not accurately forecast demand or manufacture Veklury at levels to align with actual demand, then we may experience product shortages or build excess inventory that may need to be written off.
Cell Therapy
Advancing a novel and personalized therapy such as Yescarta or Tecartus, which are chimeric antigen receptor (“CAR”) T-cell therapies, creates significant challenges, including:
•educating and certifying medical personnel regarding the procedures and the potential side effects, such as cytokine release syndrome and neurologic toxicities, in compliance with the Risk Evaluation and Mitigation Strategy program required by FDA;
•securing sufficient supply of other medications to manage side effects, such as tocilizumab and corticosteroids, which may not be available in sufficient quantities, may not adequately control the side effects and/or may have detrimental impacts on the efficacy of cell therapy;
•developing and maintaining a robust and reliable process for engineering a patient’s T cells in our facilities and infusing them back into the patient; and
•conditioning patients with chemotherapy in advance of administering our therapy, which may increase the risk of adverse side effects.
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The use of engineered T cells as a potential cancer treatment is a recent development and may not be broadly accepted by physicians, patients, hospitals, cancer treatment centers, payers and others in the medical community. While FDA has approved some cell therapies, including Yescarta and Tecartus, we must continue to demonstrate to the medical community the potential advantages of cell therapy compared to existing and future therapeutics. In November 2023, FDA announced that it is investigating the risk of T-cell malignancies in patients who received treatment with CAR T-cell therapy, noting that the overall benefits of CAR T-cell therapy products continue to outweigh their potential risks for their approved uses. In January 2024, FDA determined that safety labeling issues were needed for approved CAR T-cell therapies, including a “boxed warning” about the possible risk of T-cell malignancies in patients treated with CAR T-cell therapy. Additionally, FDA requested continued monitoring and reporting of cases of secondary cancers. For challenges related to the reimbursement of Yescarta and Tecartus, see also “Our existing products are subject to reimbursement pressures from government agencies and other third parties, required rebates and discounts, and other pricing pressures.”
We rely on third-party sites to collect patients’ white blood cells, known as apheresis centers, as well as shippers, couriers, and hospitals for the logistical collection of patients’ white blood cells and ultimate delivery of Yescarta and Tecartus to patients. These vendors may encounter disruptions or difficulties that could result in product loss and regulatory action. Apheresis centers may also choose not to participate in our quality certification process, or we may be unable to complete such certification in a timely manner or at all, which could delay or constrain our manufacturing and commercialization efforts.
We also face risks related to our in-house CAR T-cell therapy manufacturing facilities in California, Maryland and the Netherlands, spanning process development, vector manufacturing, clinical trial production and commercial product manufacturing. Quality, reliability and speed are critical in cell therapy manufacturing to quickly and safely deliver our cell therapies to patients. Any delays or quality issues with our manufacturing operations could adversely affect our business and damage our reputation. In addition, we may not be able to sufficiently increase manufacturing network capacity to meet growing demand.
Our success depends on developing and commercializing new products or expanding the indications for existing products.
If we are unable to launch commercially successful new products or new indications for existing products, our business will be adversely impacted. The launch of commercially successful products is necessary to grow our business, cover our substantial R&D expenses, and offset revenue losses when existing products lose market share due to factors such as competition and loss of patent exclusivity. There are many difficulties and uncertainties inherent in drug development and the introduction of new products. The product development cycle is characterized by significant investments of resources, long lead times and unpredictable outcomes due to the nature of developing medicines for human use. We expend significant time and resources on our product pipeline without any assurance that we will recoup our investments or that our efforts will be commercially successful. A high rate of failure is inherent in the discovery and development of new products, and failure can occur at any point in the process, including late in the process after substantial investment. Such failures have had, and may have in the future, a negative impact on our business and financial results, including as a result of our inability to recover R&D, clinical trial, acquisition-related and other expenses incurred in connection with the development of and launch preparations for our product candidates.
We face challenges in accurately forecasting sales because of the difficulties in predicting demand for our products and fluctuations in purchasing patterns or wholesaler inventories.
We may be unable to accurately predict demand for our products, including the uptake of new products, as demand depends on a number of factors. For example, product demand may be adversely affected if physicians do not see the benefit of our products. Additionally, the non-retail sector in the U.S., which includes government institutions, including state AIDS Drug Assistance Programs, the U.S. Department of Veterans Affairs, correctional facilities and large health maintenance organizations, tends to be less consistent in terms of buying patterns and often causes quarter-over-quarter fluctuations that do not mirror actual patient demand for our products. Federal and state budget pressures, as well as the annual grant cycles for federal and state funds, may cause purchasing patterns to not reflect patient demand for our products. We expect to continue to experience fluctuations in the purchasing patterns of our non-retail customers. In light of the budget crises faced by many European countries, we have observed variations in purchasing patterns induced by cost containment measures in Europe. We believe these measures have caused some government agencies and other purchasers to reduce inventory of our products in the distribution channels, and we may continue to see this trend in the future.
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We sell and distribute most of our products in the U.S. exclusively through the wholesale channel. Historically, approximately 90% of our product sales in the U.S. have been to three wholesalers, Cardinal Health, Inc., Cencora, Inc., and McKesson Corporation. The U.S. wholesalers with whom we have entered into inventory management agreements make estimates to determine end-user demand and may not be accurate in matching their inventory levels to actual end-user demand. As a result, changes in inventory levels held by those wholesalers can cause our operating results to fluctuate unexpectedly if our sales to these wholesalers do not match end-user demand. In addition, inventory is held at retail pharmacies and other non-wholesaler locations with whom we have no inventory management agreements and no control over buying patterns. Adverse changes in economic conditions, increased competition or other factors may cause retail pharmacies to reduce their inventories of our products, which would reduce their orders from wholesalers and, consequently, the wholesalers’ orders from us, even if end-user demand has not changed. In addition, we have observed that strong wholesaler and sub-wholesaler purchases of our products in the second half of the year typically results in inventory draw-down by wholesalers and sub-wholesalers in the subsequent first quarter. As inventory in the distribution channel fluctuates from quarter to quarter, we may continue to see fluctuations in our earnings and a mismatch between prescription demand for our products and our revenues.
We face significant competition from global pharmaceutical and biotechnology companies, specialized pharmaceutical firms and generic drug manufacturers.
New branded or generic products entering major markets affects our ability to maintain pricing and market share. Our products compete with other available products based primarily on efficacy, safety, tolerability, acceptance by doctors, ease of patient compliance, ease of use, price, insurance and other reimbursement coverage, distribution and marketing. A number of companies are pursuing the development of products and technologies that may be competitive with our existing products or research programs. These competing companies include large pharmaceutical and biotechnology companies and specialized pharmaceutical firms acting either independently or together with other such companies. Furthermore, academic institutions, government agencies and other public and private organizations conducting research may seek patent protection or may establish collaborative arrangements for competitive products or programs. We may be adversely impacted if any of these competitors gain market share as a result of new technologies, commercialization strategies or otherwise.
Our existing products are subject to reimbursement pressures from government agencies and other third parties, required rebates and discounts, and other pricing pressures.
Product Reimbursements
Successful commercialization of our products depends, in part, on the availability and amount of third-party payer reimbursement for our products and related treatments and medical services in the markets where we sell our products. As our products mature, pricing pressures from private insurers and government payers often result in a reduction of the net product prices.
Legislative and regulatory actions affecting government prescription drug procurement and reimbursement programs occur relatively frequently. For example, in January 2024, FDA authorized Florida’s proposed program to import prescription drugs from Canada, including Biktarvy, Descovy, Genvoya and Odefsey, although Florida must meet certain additional requirements before it can begin shipments of prescription drugs into the U.S. from Canada. We may be adversely impacted by any such legislative and regulatory actions, though it is difficult to predict the impact, if any, on the use and reimbursement of our products.
Product Pricing, Discounts and Rebates
In the U.S., the European Union (“EU”) and other significant or potentially significant markets for our products and product candidates, government authorities and third-party payers are increasingly attempting to limit or regulate the price of medical products and services. The volume of drug pricing-related legislation has dramatically increased in recent years, including:
•U.S. Congress has enacted laws requiring manufacturer refunds on certain amounts of discarded drug from single-use vials and eliminating the existing cap on Medicaid rebate amounts beginning in 2024.
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•U.S. Congress has enacted the Inflation Reduction Act of 2022 (the “Act”), which, among other changes, (1) requires the Department of Health and Human Services to “negotiate” Medicare prices for certain drugs (starting with 10 drugs in 2026, adding 15 drugs in 2027 and 2028, and adding 20 drugs in 2029 and subsequent years), (2) imposes an inflation-based rebate on Medicare Part B utilization starting in 2023 and Part D utilization beginning October 1, 2022, and (3) restructures the Medicare Part D benefit to cap out-of-pocket expenses for Part D beneficiaries beginning in 2024 and, effective January 1, 2025, increases Part D plans’ contributions in the catastrophic coverage phase and increases manufacturers’ discount contributions across coverage phases such that manufacturers must pay a 10% discount in the initial coverage phase and a 20% discount in the catastrophic phase on drugs utilized by all Part D beneficiaries, including low income subsidy patients. We continue to evaluate the potential impact of the Act on our business. Centers for Medicare & Medicaid Services (“CMS”) has issued a number of guidance documents, but it remains unclear how certain provisions will be implemented. Additional guidance, legislation or rulemaking may be issued that could reflect the government’s evolving views. In addition, multiple manufacturers and trade organizations have challenged the Medicare “negotiation” provisions of the Act, and additional legal challenges may be filed in the future. While the full impact of the Act on our business and the pharmaceutical industry remains uncertain at this time, we anticipate that the Act will increase our payment obligations under the redesigned Part D discount program, limit the prices we can charge for our products, and increase the rebates we must provide government programs for our products, thereby reducing our profitability and negatively impacting our financial results.
•Many state legislatures are considering, or have already passed into law, legislation that seeks to indirectly or directly regulate pharmaceutical drug pricing, such as requiring manufacturers to publicly report proprietary pricing information, creating review boards for prices, establishing drug payment limits, and encouraging the use of generic drugs. For example, in August 2023, the Colorado Prescription Drug Affordability Review Board (“PDAB”) selected Genvoya for an affordability review, and subsequently determined that Genvoya was not unaffordable. Similar affordability reviews of our products are taking place in Oregon and Maryland, and findings that our products are unaffordable could lead to legislative action to designate an upper limit on the amount certain purchasers and payors can pay for our products. These initiatives and such other legislation may cause added pricing pressures on our products, and the resulting impact on our business is uncertain at this time.
•Many countries outside the U.S., including the EU member states, have established complex and lengthy procedures to obtain price approvals and coverage reimbursement and periodically review their pricing and reimbursement decisions. The outcome of these reviews cannot be predicted and could have an adverse effect on the pricing and reimbursement of our medical products in the EU member states. Reductions in the pricing of our medical products in one member state could affect the price in other member states and have a negative impact on our financial results.
A substantial portion of our product sales is subject to significant discounts from list price, including rebates that we may be required to pay state Medicaid agencies and discounts provided to covered entities under Section 340B of the Public Health Service Act (“340B”). Changes to the 340B program or the Medicaid program at the federal or state level could have a material adverse effect on our business. For example, the continued growth of the 340B program limits the prices we may charge on an increasing percentage of sales. Changes to the calculation of rebates under the Medicaid program could substantially increase our Medicaid rebate obligations and decrease the prices we charge 340B-covered entities.
In March 2022, we implemented a contract pharmacy integrity initiative for our branded hepatitis C virus (“HCV”) products. This integrity initiative does not involve any products from Asegua Therapeutics LLC. Our integrity initiative requires covered entities that enter into 340B bill to/ship to arrangements with contract pharmacies for our branded HCV products to provide claims level data for units dispensed from such contract pharmacies; covered entities without an in-house pharmacy that choose not to participate in the initiative can designate a single contract pharmacy for shipment. Certain manufacturers that have implemented other contract pharmacy integrity programs have received enforcement letters from the U.S. Department of Health and Human Services (“HHS”) asserting that those programs violate the 340B statute, have been referred to the HHS Office of Inspector General for assessment of civil monetary penalties, and have been subject to administrative dispute resolution proceedings brought on behalf of covered entities. These manufacturers are currently challenging HHS’ position in ongoing litigation. Certain states have also enacted laws requiring manufacturers to provide 340B pricing through contract pharmacy arrangements; we believe these laws, which are being challenged in ongoing litigation, are invalid. We also believe that our integrity initiative complies with the requirements of the 340B statute. However, additional legal or legislative developments with respect to the 340B program, including potential litigation with HHS or other stakeholders, may negatively impact our ability to implement or continue our integrity initiative.
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In addition, standard reimbursement structures do not always adequately reimburse for innovative therapies. For example, beginning in fiscal year 2021, CMS established a new severity-adjusted diagnosis-related group (“DRG”) 018 for Medicare inpatient reimbursement of CAR T-cell products such as Yescarta and Tecartus. While the new DRG has a significantly higher base payment amount than the prior DRG 016, the payment available may not be sufficient to reimburse some hospitals for their cost of care for patients receiving Yescarta and Tecartus. When reimbursement is not aligned well to account for treatment costs, Medicare beneficiaries may be denied access as this misalignment could impact the willingness of some hospitals to offer the therapy and of doctors to recommend the therapy. Additionally, in the EU, there are barriers to reimbursement in individual countries that could limit the uptake of Yescarta and Tecartus.
Moreover, we estimate the rebates we will be required to pay in connection with sales during a particular quarter based on claims data from prior quarters. In the U.S., actual rebate claims are typically made by payers one to three quarters in arrears. Actual claims and payments may vary significantly from our estimates.
We may experience adverse impacts resulting from the importation of our products from lower price markets or the distribution of illegally diverted or counterfeit versions of our products.
Prices for our products are based on local market economics and competition and sometimes differ from country to country. Our sales in countries with relatively higher prices may be reduced if products can be imported and resold into those countries from lower price markets. For example, in January 2024, FDA authorized Florida’s proposed program to import prescription drugs from Canada, and U.S. sales may be adversely affected if Florida meets the additional requirements set by FDA in its authorization. We have entered into agreements with generic drug manufacturers as well as licensing agreements with the Medicines Patent Pool, a United Nations-backed public health organization, which allow generic drug manufacturers to manufacture generic versions of certain of our products for distribution in certain low- and middle-income countries. We may be adversely affected if any generic versions of our products, whether or not produced and/or distributed under these agreements, are exported to the U.S., the EU or markets with higher prices.
In the EU, we are required to permit products purchased in one EU member state to be sold in another member state. Purchases of our products in member states where our selling prices are relatively low for resale in member states in which our selling prices are relatively high can affect the inventory level held by our wholesalers and can cause the relative sales levels in the various countries to fluctuate from quarter to quarter and not reflect the actual consumer demand in any given quarter.
Additionally, diverted products may be used in countries where they have not been approved and patients may source the diverted products outside the legitimate supply chain. These diverted products may be handled, shipped and stored inappropriately, which may affect the quality and/or efficacy of the products and could harm patients and adversely impact us.
We are also aware of the existence of various suppliers around the world that, without Gilead’s authorization, purport to source our products and generic versions of our products and sell them for use in countries where those products have not been approved. As a result, patients may be at risk of taking unapproved medications that may not be what they purport to be, may not have the potency they claim to have or may contain harmful substances, which could harm patients and adversely impact us.
Further, third parties have illegally distributed and sold, and may continue to illegally distribute and sell, illegally diverted and counterfeit versions of our medicines, which do not meet the rigorous quality standards of our manufacturing and supply chain. For example, as part of a U.S. civil enforcement lawsuit in coordination with law enforcement, and pursuant to court order, we seized thousands of bottles of Gilead-labeled medication with counterfeit supply chain documentation. Our investigation revealed that pharmaceutical distributors that are not authorized by Gilead to sell Gilead medicine sold purportedly genuine Gilead medicine sourced from an illegal counterfeiting scheme to independent pharmacies nationwide.
Illegally diverted and counterfeit versions of Gilead-branded medicines exist and may pose a serious risk to patient health and safety. Our actions to stop or prevent the distribution and sale of illegally diverted and counterfeit versions of our medicines around the world may be costly and unsuccessful, which may adversely affect patients and our reputation and business, including our product revenues and financial results.
Product Development and Supply Chain Risks
We face risks in our clinical trials, including the potential for unfavorable results, delays in anticipated timelines and disruption.
We are required to demonstrate the safety and efficacy of product candidates that we develop for each intended use through extensive preclinical studies and clinical trials. The results from these studies do not always accurately predict results in later, large-scale clinical trials. Even successfully completed large-scale clinical trials may not result in marketable products.
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We face numerous risks and uncertainties with our clinical trials that could result in delays or prevent completion of the development and approval of our product candidates, including challenges in clinical trial protocol design, our ability to enroll patients in clinical trials, the possibility of unfavorable or inadequate trial results to support further development of our product candidates, including failure to meet a trial’s primary endpoint, safety issues arising from our clinical trials, and the need to modify or delay our clinical trials or to perform additional trials. For example, in January 2024, we announced that our Phase 3 EVOKE-01 study evaluating sacituzumab govitecan-hziy did not meet its primary endpoint of overall survival in previously treated metastatic non-small cell lung cancer (“NSCLC”), which resulted in us recording an impairment charge during the three months ended March 31, 2024 (for more information, see Note 7. Intangible Assets of the Notes to Condensed Consolidated Financial Statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q). In addition, following results and data from several magrolimab studies as well as corresponding FDA clinical holds, we announced in February 2024 that we would not pursue further development of magrolimab in hematologic cancers.
As a result, we may be unable to successfully complete our clinical trials on our anticipated timelines, or at all. Based on trial results, it is possible that FDA and other regulatory authorities do not approve our product candidates, or that any market approvals include significant limitations on the products’ use. In addition, clinical trials involving our commercial products can raise new safety issues for our existing products, which could adversely impact our business. Further, we have in the past and we may in the future make a strategic decision to discontinue development of our product candidates, including but not limited to situations where we believe commercialization will be difficult relative to other opportunities in our pipeline. For example, in January 2024, we announced with our partner Arcus Biosciences, Inc. (“Arcus”) the discontinuation of further enrollment in the Phase 3 ARC-10 study evaluating domvanalimab plus zimberelimab in first-line locally advanced or metastatic, PD-L1-high NSCLC based on strategic prioritization to advance and potentially accelerate other Phase 3 studies in our collaboration with Arcus. Therefore, our product candidates may never be successfully commercialized, and we may be unable to recoup the significant R&D, clinical trial, acquisition-related and other expenses incurred. We expect to spend significant time and resources on our clinical trial activities without any assurance that we will recoup our investments or that our efforts will be commercially successful.
There are also risks associated with the use of third parties in our clinical trial activities. We extensively outsource our clinical trial activities and usually perform only a small portion of the start-up activities in-house. We rely on third-party contract research organizations (“CROs”) to perform most of our clinical studies, including document preparation, site identification, screening and preparation, pre-study visits, training, program management, patient enrollment, ongoing monitoring, site management and bioanalysis. In addition, we depend on third-party contract manufacturing organizations (“CMOs”), including those located outside the U.S., to manufacture clinical materials. Many important aspects of the services performed for us by the CROs and CMOs are not within our direct control. If there is any dispute or disruption in our relationships with our CROs and CMOs, including as a result of legislative or regulatory actions (such as the recently proposed BIOSECURE Act in the U.S. (the “BIOSECURE Act”)), our clinical trials and regulatory submissions may be delayed and our costs may increase. Moreover, in our regulatory submissions, we rely on the quality and validity of the clinical work performed by third-party CROs. If any of our CROs’ processes, methodologies or results were determined to be invalid or inadequate, our own clinical data and results and related regulatory approvals may be adversely affected.
We may face manufacturing difficulties, delays or interruptions, including at our third-party manufacturers and corporate partners.
Our products, which are manufactured at our own facilities or by third-party manufacturers and corporate partners, are the result of complex, highly regulated manufacturing processes. We depend on third-party manufacturers and corporate partners to perform manufacturing activities effectively and on a timely basis for the majority of our active pharmaceutical ingredients and drug products. These third parties are independent entities subject to their own unique operational and financial risks that are out of our control. We and our third-party manufacturers and corporate partners are subject to Good Manufacturing Practices (“GMP”), which are extensive regulations governing manufacturing processes, stability testing, record keeping and quality standards as defined by FDA and European Medicines Agency (“EMA”), as well as comparable regulations in other jurisdictions. Manufacturing operations are also subject to routine inspections by regulatory agencies.
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Any adverse developments affecting or resulting from our manufacturing operations or the operations of our third-party manufacturers and corporate partners may result in shipment delays, inventory shortages, lot failures, product withdrawals or recalls or other interruptions in the commercial supply of our products. We have incurred, and will continue to incur, inventory write-off charges and other expenses for products that fail to meet specifications and quality standards as well as changes we may adopt in our manufacturing strategy, and we may need to undertake costly remediation efforts or seek more costly manufacturing alternatives. Such developments could increase our manufacturing costs, cause us to lose revenues or market share and damage our reputation. In addition, manufacturing issues may cause delays in our clinical trials and applications for regulatory approval. For example, if we are unable to remedy any deficiencies cited by FDA or other regulatory agencies in their inspections, our existing products and the timing of regulatory approval of product candidates in development could be adversely affected. Further, there is risk that regulatory agencies in other countries where marketing applications are pending will undertake similar additional reviews or apply a heightened standard of review, which could delay the regulatory approvals for products in those countries. Our business may be adversely affected if approval of any of our product candidates were delayed or if production of our products were interrupted.
We may not be able to obtain materials or supplies necessary to conduct clinical trials or to manufacture and sell our products, which could limit our ability to generate revenues as well as increase our expenses.
We need access to certain supplies and products to conduct our clinical trials and to manufacture and sell our products. If we are unable to purchase enough of these materials or find suitable alternative materials in a timely manner, our development efforts for our product candidates may be delayed or our ability to manufacture and sell our products could be limited. For example, in the U.S., there has been a shortage of certain cancer drugs that are the backbone of standard-of-care treatments, such as carboplatin and cisplatin, which are also used in R&D and clinical trials. While we have observed minimal impacts to our oncology clinical trials to date, if these shortages continue or increase in magnitude, our ongoing and future oncology clinical trials may be delayed, halted or adversely impacted.
Suppliers of key components and materials must be named in the new drug application or marketing authorization application filed with the regulatory authority for any product candidate for which we are seeking marketing approval, and significant delays can occur if the qualification of a new supplier is required. Even after a manufacturer is qualified by the regulatory authority, the manufacturer must continue to expend time, money and effort in the area of production and quality control to maintain full compliance with GMP. Manufacturers are subject to regular periodic inspections by regulatory authorities following initial approval. If, as a result of these inspections, a regulatory authority determines that the equipment, facilities, laboratories or processes do not comply with applicable regulations and conditions of product approval, the regulatory authority may suspend the manufacturing operations. If the manufacturing operations of any of the single suppliers for our products are suspended, we may be unable to generate sufficient quantities of commercial or clinical supplies of product to meet market demand. In addition, if deliveries of materials from our suppliers are interrupted for any reason, including as a result of natural disasters or extreme weather conditions, we may be unable to ship certain of our products for commercial supply or to supply our product candidates in development for clinical trials. Also, some of our products and the materials that we utilize in our operations are manufactured by only one supplier or at only one facility, which we may not be able to replace in a timely manner and on commercially reasonable terms, or at all. Problems with any of the single suppliers or facilities we depend on, including in the event of a disaster, such as an earthquake, flood or fire, equipment failure or other difficulty, may negatively impact our development and commercialization efforts.
A significant portion of the raw materials and intermediates used to manufacture our products and product candidates are supplied by third-party manufacturers and corporate partners outside of the U.S. As a result, any political or economic factors in a specific country or region, including any new, or changes in or interpretations of existing, trade regulations, compliance requirements or tax or other legislation (such as the recently proposed BIOSECURE Act), that would limit or prevent third parties outside of the U.S. from supplying these materials could adversely affect our ability to manufacture and supply our products to meet market needs and have a material and adverse effect on our operating results. Such factors may also negatively impact our ability to supply our clinical trials, which may result in the delay of our clinical trials and regulatory submissions as well as increased costs.
If we were to encounter any of these difficulties, our ability to conduct clinical trials on product candidates and to manufacture and sell our products could be impaired.
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Regulatory and Other Legal Risks
Our operations depend on compliance with complex FDA and comparable international regulations. Failure to obtain approvals on a timely basis or to maintain compliance could delay or halt commercialization of our products.
The products we develop must be approved for marketing and sale by regulatory authorities and, once approved, are subject to extensive regulation by FDA, EMA and comparable regulatory agencies in other countries. We have filed, and anticipate that we will continue to file, for marketing approval in additional countries and for additional indications and products. These and any future marketing applications we file may not be approved by the regulatory authorities on a timely basis, or at all. For example, in October 2022, we announced that FDA issued a complete response letter for our Biologics License Application for bulevirtide for the treatment of adults with hepatitis delta virus infection. Additionally, FDA review of the new drug application for seladelpar for the treatment of primary biliary cholangitis is ongoing with a Prescription Drug User Fee Act target action date in the second half of 2024, and the FDA may not approve it on a timely basis, or at all. Even if marketing approval is granted for these products, there may be significant limitations on their use. We cannot state with certainty when or whether any of our product candidates under development will be approved or launched; whether we will be able to develop, license or acquire additional product candidates or products; or whether any products, once launched, will be commercially successful.
Further, how we manufacture and sell our products is subject to extensive regulation and review. For example, under FDA rules, we are often required to conduct post-approval clinical studies to assess a known serious risk, signals of serious risk or to identify an unexpected serious risk. In certain circumstances, we may be required to implement a Risk Evaluation and Mitigation Strategy program for our products, which could include a medication guide, patient package insert, a communication plan to healthcare providers, restrictions on distribution or use of a product and other elements FDA deems necessary to assure safe use of the drug. Discovery of previously unknown problems with our marketed products or product candidates, including serious safety, resistance or drug interaction issues, or problems with our manufacturing, safety reporting or promotional activities, may result in regulatory approvals being delayed, denied or granted with significant restrictions on our products, including limitations on or the withdrawal of the products from the market.
Failure to comply with these or other requirements imposed by FDA could result in significant civil monetary penalties, fines, suspensions of regulatory approvals, product recalls, seizure of products and criminal prosecutions.
We are impacted by evolving laws, regulations and legislative or regulatory actions applicable to the healthcare industry.
The healthcare industry is subject to various federal, state and international laws and regulations pertaining to drug approval, reimbursement, rebates, price reporting, healthcare fraud and abuse, and data privacy and security. In the U.S., these laws include anti-kickback and false claims laws, Federal Food, Drug, and Cosmetic Act, laws and regulations relating to the Medicare and Medicaid programs and other federal and state programs, such as the Medicaid Rebate Statute and the 340B statute, laws that regulate written and verbal communications about our products, individual state laws relating to pricing and sales and marketing practices, the Health Insurance Portability and Accountability Act and other federal and state laws relating to the privacy and security of health information, including the Executive Order on Preventing Access to Americans’ Bulk Sensitive Personal Data and United States Government-Related Data by Countries of Concern issued in February 2024. Actual or alleged violations of these laws or any related regulations may be punishable by criminal and/or civil sanctions, including, in some instances, substantial fines, civil monetary penalties, exclusion from participation in federal and state healthcare programs, including Medicare, Medicaid and U.S. Department of Veterans Affairs and U.S. Department of Defense health programs, actions against executives overseeing our business and significant remediation measures, negative publicity or other consequences. These laws and regulations are broad in scope and subject to changing and evolving interpretations, which could require us to incur substantial costs associated with compliance, alter one or more of our sales or marketing practices, or impact our ability to obtain or maintain regulatory approvals. The resulting impact on our business is uncertain and could be material. Additionally, recently proposed legislation in the U.S., such as the BIOSECURE Act (which among other things, could prohibit U.S. executive agencies from contracting with, or expending loans or granting funds to, companies that use biotechnology equipment or services from certain parties outside of the U.S.), has the potential to adversely impact our ability to receive services from such parties, including certain of which we use in connection with our clinical trials and our clinical and commercial manufacturing, which could increase the cost or limit the supply of material available to us, delay the procurement or supply of such material, delay or impact clinical trials and regulatory submissions, delay the launch of commercial products and adversely affect our financial condition and business prospects.
In addition, government price reporting and payment regulations are complex, and we are continually assessing the methods by which we calculate and report pricing in accordance with these obligations. Our methodologies for calculations are inherently subjective and may be subject to review and challenge by various government agencies, which may disagree with our interpretation. If the government disagrees with our reported calculations, we may need to restate previously reported data and could be subject to additional financial and legal liability.
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There also continues to be enhanced scrutiny of company-sponsored patient assistance programs, including co-pay assistance programs and manufacturer donations to third-party charities that provide such assistance. There has also been enhanced scrutiny by governments on reimbursement and other patient support offerings, clinical education programs and promotional speaker programs. If we, or our agents and vendors, are deemed to have failed to comply with laws, regulations or government guidance in any of these areas, we could be subject to criminal or civil sanctions. Any similar violations by our competitors could also negatively impact our industry reputation and increase scrutiny over our business and our products.
For a description of our government investigations and related litigation, see Note 10. Commitments and Contingencies of the Notes to Condensed Consolidated Financial Statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.
We are subject to risks if significant safety issues arise for our marketed products or our product candidates.
As additional studies are conducted after obtaining marketing approval for our products, and as our products are used over longer periods of time by many patients, including patients with underlying health problems or those taking other medicines, we expect to continue finding new issues related to safety, resistance or drug interactions. Any such issues may require changes to our product labels, such as additional warnings, contraindications or even narrowed indications, or the halt of product sales.
Regulatory authorities have been moving towards more active and transparent pharmacovigilance and are making greater amounts of stand-alone safety information and clinical trial data directly available to the public through websites and other means, such as periodic safety update report summaries, risk management plan summaries and various adverse event data. Safety information, without the appropriate context and expertise, may be misinterpreted and lead to misperception or legal action.
Our success depends to a significant degree on our ability to obtain and defend our patents and other intellectual property rights both domestically and internationally, and to operate without infringing upon the patents or other proprietary rights of third parties.
Patents and other proprietary rights are very important to our business. As part of our business strategy, we actively seek patent protection both in the U.S. and internationally and file additional patent applications, when appropriate, to cover improvements in our compounds, products and technology. Our success depends to a significant degree on our ability to:
•obtain patents and licenses to patent rights;
•preserve trade secrets and internal know-how;
•defend against infringement of our patents and efforts to invalidate them; and
•operate without infringing on the intellectual property of others.
Because patent applications are confidential for a period of time after filing, we may not know if our competitors have filed applications for technology covered by our pending applications or if we were the first to invent or first to file an application directed toward the technology that is the subject of our patent applications. If competitors file patent applications covering our technology, we may have to participate in litigation, post-grant proceedings before the U.S. Patent and Trademark Office or other proceedings to determine the right to a patent or validity of any patent granted. Such litigation and proceedings are unpredictable and expensive, and could divert management attention from other operations, such that, even if we are ultimately successful, we may be adversely impacted.
Patents covering our existing compounds, products and processes, and those that we will likely file in the future, may not provide complete or adequate protection. Filing patent applications is a fact-intensive and complex process. We may file patent applications that ultimately do not result in patents or have patents that do not provide adequate protection for the related product. Future litigation or other proceedings regarding the enforcement or validity of our existing patents or any future patents could result in the invalidation of our patents or substantially reduce their protection. In addition, we may face criticism as a result of our legitimate use of the patent systems to protect our investments in new and useful innovations in medicine.
Generic manufacturers have sought, and may continue to seek, FDA approval to market generic versions of our products through an abbreviated new drug application (“ANDA”), the application process typically used by manufacturers seeking approval of a generic drug. For a description of our ANDA litigation, see Note 10. Commitments and Contingencies of the Notes to Condensed Consolidated Financial Statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q. ANDA litigation and related settlement and license agreements, in some cases, may result in a loss of exclusivity for our patents sooner than we would otherwise expect. In addition, loss of exclusivity may be earlier than expected under these settlement and license agreements under certain circumstances. For example, settlement and license agreements with generic manufacturers typically include acceleration clauses that permit generic entry before the agreed-upon entry date in certain circumstances, and generic manufacturers may continue to challenge the patents protecting our products. The entry of generic versions of our products has, and may in the future, lead to market share and price erosion.
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If we are found to infringe the valid patents of third parties, we may be required to pay significant monetary damages or we may be prevented from commercializing products or may be required to obtain licenses from these third parties. We may not be able to obtain alternative technologies or any required license on commercially reasonable terms or at all. If we fail to obtain these licenses or alternative technologies, we may be unable to develop or commercialize some or all of our products. For example, we are aware of patents and patent applications owned by other parties that such parties may claim to cover the use of our products and research activities. For a description of our pending patent litigation, see Note 10. Commitments and Contingencies of the Notes to Condensed Consolidated Financial Statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q.
Furthermore, we also rely on unpatented trade secrets and improvements, unpatented internal know-how and technological innovation. We protect these rights mainly through confidentiality agreements with our corporate partners, employees, consultants and vendors. We cannot be certain that these parties will comply with these confidentiality agreements, that we have adequate remedies for any breach or that our trade secrets, internal know-how or technological innovation will not otherwise become known or be independently discovered by our competitors. Under some of our R&D agreements, inventions become jointly owned by us and our corporate partner and in other cases become the exclusive property of one party. In certain circumstances, it can be difficult to determine who owns a particular invention and disputes could arise regarding those inventions. We could be adversely affected if our trade secrets, internal know-how, technological innovation or confidential information become known or independently discovered by competitors or if we enter into disputes over ownership of inventions.
We face potentially significant liability and increased expenses from litigation and government investigations relating to our products and operations.
We are involved in a number of litigation, investigation and other dispute-related matters that require us to expend substantial internal and financial resources. From time to time, these matters require us to pay significant monetary amounts, including royalty payments for past and future sales. We expect these matters will continue to require a high level of internal and financial resources for the foreseeable future. These matters have reduced, and are expected to continue to reduce, our earnings and require significant management attention.
In addition, the testing, manufacturing, marketing and use of our commercial products, as well as product candidates in development, involve substantial risk of product liability claims. These claims may be made directly by consumers, healthcare providers, pharmaceutical companies or others. We have limited insurance for product liabilities that may arise and claims may exceed our coverage.
For a description of our litigation, investigation and other dispute-related matters, see Note 10. Commitments and Contingencies of the Notes to Condensed Consolidated Financial Statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q. The outcome of such legal proceedings or any other legal proceedings that may be brought against us, the investigations or any other investigations that may be initiated and any other dispute-related matters, are inherently uncertain, and adverse developments or outcomes can result in significant expenses, monetary damages, penalties or injunctive relief against us.
Operational Risks
Our business has been, and may in the future be, adversely affected by outbreaks of epidemic, pandemic or contagious diseases.
Actual or threatened outbreaks of epidemic, pandemic or contagious diseases, or other public health emergencies, may significantly disrupt our global operations and adversely affect our business, financial condition and results of operations. As we have seen with the COVID-19 pandemic, outbreaks can result in global supply chain and logistics disruptions and distribution constraints. The impact of an outbreak or other public health crisis on our results of operations and financial condition would depend on numerous evolving factors, but could involve higher operating expenses, lower demand for our products as a result of governmental, business and individuals’ actions taken in response to such an event (including quarantines, travel restrictions and interruptions to healthcare services, which can impact enrollment in or operation of our clinical trials or limit patients’ ability or willingness to access and seek care), challenges associated with the safety of our employees and safe occupancy of our job sites, and financial market volatility and significant macroeconomic uncertainty in global markets. An outbreak or public health emergency also could amplify many of the other risks described throughout the “Risk Factors” section of this Quarterly Report on Form 10-Q.
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We face risks associated with our global operations.
Our global operations are accompanied by certain financial, political, economic and other risks, including those listed below:
•Foreign Currency Exchange: For the three months ended March 31, 2024, approximately 28% of our product sales were denominated in foreign currencies. Because a significant percentage of our product sales is denominated in foreign currencies, primarily the Euro, we face exposure to adverse movements in foreign currency exchange rates. Overall, we are a net receiver of foreign currencies, and therefore, we benefit from a weaker U.S. dollar and are adversely affected by a stronger U.S. dollar. Our hedging program does not eliminate our exposure to currency fluctuations. We may be adversely impacted if the U.S. dollar appreciates significantly against certain currencies and our hedging program does not sufficiently offset the effects of such appreciation. For example, see “Foreign Currency Exchange Impact” in Part I, Item 2 of this Quarterly Report on Form 10-Q for a discussion of our exposure to movements in foreign currency exchange rates, primarily in the Euro, and the impacts from foreign currency exchange, net of hedges, for the three months ended March 31, 2024.
•Interest Rates and Inflation: We have interest-generating assets and interest-bearing liabilities, including our senior unsecured notes and credit facilities. Fluctuations in interest rates could expose us to increased financial risk. In addition, high inflation, such as what we are seeing in the current economic environment, has adversely impacted and may continue to adversely impact our business and financial results.
•Anti-Bribery: We are subject to the U.S. Foreign Corrupt Practices Act and similar worldwide anti-bribery laws that govern our international operations with respect to payments to government officials. Our international operations are heavily regulated and require significant interaction with foreign officials. We operate in parts of the world that have experienced governmental corruption to some degree. In certain circumstances, strict compliance with anti-bribery laws may conflict with local customs and practices or may require us to interact with doctors and hospitals, some of which may be state-controlled, in a manner that is different than local custom. It is possible that certain of our practices may be challenged under these laws. In addition, our internal control policies and procedures may not protect us from reckless or criminal acts committed by our employees and agents. Enforcement activities under anti-bribery laws could subject us to administrative and legal proceedings and actions, which could result in civil and criminal sanctions, including monetary penalties and exclusion from healthcare programs.
Other risks inherent in conducting a global business include:
•Restrictive government actions against our intellectual property and other assets such as nationalization, expropriation, the imposition of compulsory licenses or similar actions, including waiver of intellectual property protections.
•Protective economic policies taken by governments, such as trade protection measures and import and export licensing requirements, which may result in the imposition of trade sanctions or similar restrictions by the U.S. or other governments.
•Political instability or disruption in a geographic region where we operate, regardless of cause, including war, terrorism, social unrest and political changes, including in China, Russia, Ukraine, Israel and surrounding areas.
•Increasing use of social media platforms and modern technologies present new risks and challenges, and inappropriate or unauthorized use of these platforms can result in exposure of sensitive data or information and damage our brand and reputation.
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Climate change and related natural disasters, as well as legal, regulatory, or market measures to address climate change, can negatively affect our business and operations.
Many of our operations and facilities, including those essential to our manufacturing, R&D and commercialization/distribution activities, are located in regions subject to natural or man-made disasters, such as climate change, earthquakes, hurricanes, rising sea levels and flooding, fires, extreme heat, drought or other extreme weather conditions, or efforts taken by third parties to prevent or mitigate such disasters, such as public safety power shutoffs and facility shutdowns. The severity and frequency of weather-related events has been amplified, and is expected to continue to be amplified, by climate change. Such natural disasters have caused, and in the future may cause, damage to and/or disrupt our operations, which may result in a material adverse effect on our business and financial results. For example, our facility in Cork, Ireland, where we conduct commercial manufacturing, packaging and labeling and perform quality control testing and final release of many of our products, temporarily suspended on-site operations as a result of the flooding caused by Storm Babet in October 2023. Additionally, our corporate headquarters in Foster City and certain R&D and manufacturing facilities are located in California, a seismically active region. Although we have business continuity plans and contingencies in place and conduct periodic assessments of our natural disaster risk as part of our overall enterprise risk management program, a major earthquake or other natural disaster can result in significant recovery time and a prolonged interruption to our operational and business activities. We may be required to incur significant costs to remedy the effects of such natural disasters and to resume or restore our operations, which could adversely impact us. Our suppliers and third-party manufacturers and corporate partners face similar risks, and any disruption to their operations could have an adverse effect on our manufacturing and supply chain. Also, see risks under the headings “We may face manufacturing difficulties, delays or interruptions, including at our third-party manufacturers and corporate partners” and “We may not be able to obtain materials or supplies necessary to conduct clinical trials or to manufacture and sell our products, which could limit our ability to generate revenues as well as increase our expenses.”
In addition, growing concern regarding climate change has resulted in an evolving legal and regulatory landscape, with new requirements enacted to prevent, mitigate or adapt to the implications of climate change. These regulations, which can differ across jurisdictions, subject Gilead to many transitional risks, including, for example, new or expanded carbon pricing or taxes, increased compliance costs, restrictions on greenhouse gas emissions, investment in new technologies, increased carbon disclosure and transparency, investments in data gathering and reporting systems, upgrades of facilities to meet new building codes and the redesign of utility systems, which could increase the company’s operating costs, including the cost of electricity and energy. Our suppliers and third-party manufacturers and corporate partners face similar transition risks and may pass along any increased costs to the company.
Our aspirations, goals and disclosures related to environmental, social and governance (“ESG”) matters expose us to numerous risks, including risks to our reputation and stock price.
Institutional and individual investors are increasingly using ESG screening criteria to determine whether Gilead qualifies for inclusion in their investment portfolios. We are frequently asked by investors and other stakeholders to set ambitious ESG goals and provide new and more robust disclosure on goals, progress toward goals and other matters of interest to ESG stakeholders. In response, we have adapted the tracking and reporting of our corporate responsibility program to various evolving ESG frameworks, and we have established and announced goals and other objectives related to ESG matters. These goal statements reflect our current plans and aspirations and are not guarantees that we will be able to achieve them. Our efforts to accomplish and accurately report on these goals and objectives present numerous operational, reputational, financial, legal and other risks, any of which could have a material negative impact, including on our reputation and stock price.
Our ability to achieve any goal or objective, including with respect to environmental and diversity initiatives, is subject to numerous risks, many of which are outside of our control. Examples of such risks include: (1) the availability and cost of low- or non-carbon-based energy sources and technologies, (2) evolving regulatory requirements affecting ESG standards or disclosures, (3) the availability of suppliers that can meet our sustainability, diversity and other standards, (4) our ability to recruit, develop and retain diverse talent in our labor markets and (5) the impact of our organic growth and acquisitions or dispositions of businesses or operations.
The standards for tracking and reporting on ESG matters are relatively new, have not been harmonized and continue to evolve. Our selection of disclosure frameworks that seek to align with various reporting standards may change from time to time and may result in a lack of consistent or meaningful comparative data from period to period. In addition, regulatory authorities may impose mandatory disclosure requirements with respect to ESG matters, such as recent U.S. Securities and Exchange Commission rules requiring companies to make certain climate-related disclosures, including information about climate-related risks, greenhouse gas emissions and certain climate-related financial statement metrics, or California’s Climate-Related Financial Risk Act and the Climate Corporate Data Accountability Act. Our processes and controls may not reflect evolving standards for identifying, measuring and reporting ESG matters, immediately or at all, our interpretation of reporting standards may differ from those of others, and such standards may change over time, any of which could result in significant revisions to our goals or reported progress in achieving such goals. In addition, enhancements to our processes and controls to reflect evolving reporting standards may be costly and require additional resources.
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If our ESG practices do not meet evolving investor or other stakeholder expectations and standards, then our reputation, our ability to attract or retain employees and our attractiveness as an investment, business partner or acquiror could be negatively impacted. Similarly, our failure or perceived failure to pursue or fulfill our goals, targets and objectives or to satisfy various reporting standards within the timelines we announce, or at all, could also have similar negative impacts and expose us to government enforcement actions and private litigation.
We depend on relationships with third parties for sales and marketing performance, technology, development, logistics and commercialization of products. Failure to maintain these relationships, poor performance by these companies or disputes with these third parties could negatively impact our business.
We rely on a number of collaborative relationships with third parties for our sales and marketing performance in certain territories. In some countries, we rely on international distributors for sales of certain of our products. Some of these relationships also involve the clinical development of these products by our partners. Reliance on collaborative relationships poses a number of risks, including the risk that:
•we are unable to control the resources our corporate partners devote to our programs or products;
•disputes may arise with respect to the ownership of rights to technology developed with our corporate partners;
•disagreements with our corporate partners could cause delays in, or termination of, the research, development or commercialization of product candidates or result in litigation or arbitration;
•contracts with our corporate partners may fail to provide significant protection or may fail to be effectively enforced if one of these partners fails to perform;
•our corporate partners have considerable discretion in electing whether to pursue the development of any additional products and may pursue alternative technologies or products either on their own or in collaboration with our competitors;
•our corporate partners with marketing rights may choose to pursue competing technologies or to devote fewer resources to the marketing of our products than they do to products of their own development; and
•our distributors and our corporate partners may be unable to pay us.
Given these risks, there is a great deal of uncertainty regarding the success of our current and future collaborative efforts. If these efforts fail, our product development or commercialization of new products could be delayed or revenues from products could decline.
Due to the specialized and technical nature of our business, the failure to attract, develop and retain highly qualified personnel could adversely impact us.
Our future success will depend in large part on our continued ability to attract, develop and retain highly qualified scientific, technical and management personnel, as well as personnel with expertise in clinical testing, governmental regulation and commercialization. Our ability to do so also depends in part on how well we maintain a strong workplace culture that is attractive to employees. In addition, competition for qualified personnel in the biopharmaceutical field is intense, and there is a limited pool of qualified potential employees to recruit. We face competition for personnel from other companies, universities, public and private research institutions, government entities and other organizations. Furthermore, changes to immigration and work authorization laws and regulations could make it more difficult for employees to work in or transfer to one of the jurisdictions in which we operate. Additionally, we periodically make adjustments to reflect our personnel needs in response to changing macroeconomic conditions, market opportunities, management changes, acquisitions, cost levels and other internal and external considerations, which may adversely impact our workplace culture and ability to retain and incentivize employees.
The failure to successfully implement or upgrade enterprise resource planning and other information systems could adversely impact our business and results of operations.
We periodically implement or upgrade new or enhanced enterprise resource planning (“ERP”) and other information systems in order to better manage our business operations, align our global organizations and enable future growth. Implementation or upgrade of new business processes and information systems requires the commitment of significant personnel, training and financial resources, and entails risks to our business operations. If we do not successfully implement ERP and other information systems improvements, or if there are delays or difficulties in implementing these systems, we may not realize anticipated productivity improvements or cost efficiencies, and we may experience operational difficulties and challenges in effectively managing our business, all of which could result in quality issues, reputational harm, lost market and revenue opportunities, and otherwise adversely affect our business, financial condition and results of operations.
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For example, we are currently in the process of implementing new ERP and other information systems to help us manage our operations and financial reporting. Costs and risks inherent in this transition may include disruptions to business continuity, administrative and technical problems, interruptions or delays in sales, manufacturing or R&D processes, expenditure overruns, delays in paying our suppliers and employees, and data migration issues. If we do not properly address or mitigate these issues, this could result in increased costs and diversion of resources, negatively impacting our operating results and ability to effectively manage our business. Additionally, if we do not effectively implement the ERP system as planned, or the ERP system does not operate as intended, the effectiveness of our internal control over financial reporting could be negatively affected.
Information system service interruptions or breaches, including significant cybersecurity incidents, could give rise to legal liability and regulatory action under data protection and privacy laws and adversely affect our business and operations.
We are dependent upon information technology systems, infrastructure and data, including our Kite Konnect platform, which is critical to maintain chain of identity and chain of custody of Yescarta and Tecartus. The multitude and complexity of our computer systems make them inherently vulnerable to service interruption or destruction, including those caused by failures during system upgrades or implementations, user error, network or hardware failure, malicious intrusion and ransomware attack. Likewise, data privacy or cybersecurity incidents or breaches by employees or others can result in the exposure of sensitive data, including our intellectual property or trade secrets or the personal information of our employees, patients, customers or other business partners to unauthorized persons or to the public. If our information systems or third-party information systems on which we rely suffer severe damage, disruption or shutdown, including during upgrades or new implementations, and our business continuity plans do not effectively resolve the issues in a timely manner, we could experience delays in reporting our financial results, and we may lose revenue and profits as a result of our inability to timely manufacture, distribute, invoice and collect payments. Cybersecurity attacks and incidents are increasing in their frequency, sophistication and intensity. Malicious actors seek to steal money, gain unauthorized access to, destroy or manipulate data, and disrupt operations, and some of their attacks may not be recognized or discovered until after a significant period of time well after initial entry into the environment, such as novel or zero-day attacks that are launched before patches are available and defenses can be readied. Malicious actors are also increasingly developing methods to avoid prevention, detection and alerting capabilities, including employing counter-forensic tactics making response activities more difficult. Such attacks and incidents include, for example, the deployment of harmful malware, exploitation of vulnerabilities, computer viruses, key loggers, ransomware, denial-of-service, social engineering and other means to affect service reliability and operations and threaten data confidentiality, integrity and availability. Our business and technology partners face similar risks and any security breach of their systems could adversely affect our security posture.
Like many companies, we have experienced and expect to continue to be the target of cybersecurity incidents, including data breaches and temporary service interruptions. When cybersecurity incidents occur, our policy is to respond and address them in accordance with applicable governmental regulations and other legal requirements, including our cybersecurity protocols. There can be no assurance that our efforts in response to cybersecurity incidents, as well as our investments to protect our information technology infrastructure and data, will shield us from significant losses, brand and reputational harm and potential liability or prevent any future interruption or breach of our systems. Such cybersecurity incidents can cause the loss of critical or sensitive information, including personal information, and could give rise to legal liability and regulatory action under data protection and privacy laws. Financial, legal, business, or reputational losses may result from a cybersecurity incident or breach of our information technology systems.
Regulators globally are also imposing data privacy and security requirements, such as EU’s General Data Protection Regulation (“GDPR”) and other domestic data privacy and security laws, such as the California Consumer Privacy Act and the California Privacy Rights Act. These and other similar types of laws and regulations that have been or may be passed, often include requirements with respect to personal information, and non-compliance with such laws may result in liability through private actions (subject to statutorily defined damages in the event of certain data breaches) and enforcement. Other changes or new laws or regulations associated with the enhanced protection of personal information, could greatly increase our cost of providing our products and services or even prevent us from offering certain services in jurisdictions in which we operate.
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Strategic and Financial Risks
We are subject to risks associated with engaging in business acquisitions, licensing arrangements, collaborations, options, equity investments, asset divestitures and other strategic transactions.
We have engaged in, and may in the future engage in, such transactions as part of our business strategy. We may not identify suitable transactions in the future and, if we do, we may not complete such transactions in a timely manner, on a cost-effective basis, or at all, including the possibility that a governmental entity or regulatory body may delay or refuse to grant approval for the consummation of the transaction. If we are successful in making an acquisition or closing a licensing arrangement or collaboration, the products, intellectual property and technologies that are acquired or licensed may not be successful or may require significantly greater resources and investments than anticipated. As part of our annual impairment testing of our goodwill and other indefinite-lived intangible assets in the fourth quarter, and earlier if impairment indicators exist, as required under U.S. generally accepted accounting principles, we have in the past and may in the future need to recognize impairment charges related to the products, intellectual property and technologies that are acquired or licensed. For example, as a result of an impairment analysis we conducted following our receipt of data in March 2022 from the Phase 3 TROPiCS-02 study evaluating Trodelvy in patients with hormone receptor-positive, human epidermal growth receptor 2-negative metastatic breast cancer, we recognized a partial in-process research and development impairment charge on our Condensed Consolidated Statements of Income during 2022. Similarly, we recorded a partial impairment charge during the three months ended March 31, 2024 in connection with our Phase 3 EVOKE-01 study evaluating sacituzumab govitecan-hziy (for more information, see Note 7. Intangible Assets of the Notes to Condensed Consolidated Financial Statements included in Part I, Item 1 of this Quarterly Report on Form 10-Q). For option structured deals, there is no assurance that we will elect to exercise our option right, and it is possible that disagreements, uncertainties or other circumstances may arise, including with respect to whether our option rights have been appropriately triggered, which may hinder our ability to realize the expected benefits. For example, in March 2023, we waived our exclusive option to acquire Pionyr Immunotherapeutics, and in September 2023, we waived our exclusive option to acquire Tizona Therapeutics, Inc. For equity investments in our strategic partners, such as in connection with our collaborations with Arcus Biosciences, Inc., Galapagos NV and Arcellx, Inc., the value of our equity investments may fluctuate and decline in value. If we are not successful in the execution or implementation of these transactions, our financial condition, cash flows and results of operations may be adversely affected, and our stock price could decline.
We have paid substantial amounts of cash and incurred additional debt to finance our strategic transactions. Additional indebtedness and a lower cash balance could result in a downgrade of our credit ratings, limit our ability to borrow additional funds or refinance existing debt on favorable terms, increase our vulnerability to adverse economic or industry conditions, and reduce our financial flexibility to continue with our capital investments, stock repurchases and dividend payments. For example, as a result of the cash used and the debt issued in connection with our acquisition of Immunomedics, Inc. in 2020, S&P Global Ratings downgraded our credit rating. We may be adversely impacted by any failure to overcome these additional risks.
Changes in our effective income tax rate could reduce our earnings.
We are subject to income taxes in the U.S. and various foreign jurisdictions. Due to economic and political conditions, various countries are actively considering and have made changes to existing tax laws, and we cannot predict the form or timing of such changes. Our effective tax rates are affected by changes in the mix of earnings in countries with differing statutory tax rates, changes in the valuation of deferred tax assets and liabilities, the introduction of new taxes, and changes in tax laws, regulations, administrative practices and interpretations, including in the U.S., Germany and Ireland.
We are also subject to the examination of our tax returns and other tax matters by the U.S. Internal Revenue Service and tax authorities in various foreign jurisdictions. There are differing interpretations of tax laws and regulations and, as a result, significant disputes may arise with these tax authorities involving issues of the timing and amount of deductions and allocations of income among various tax jurisdictions. We may be adversely affected by the resolution of one or more of these exposures in any reporting period.
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Item 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS
Issuer Purchases of Equity Securities
In the first quarter of 2020, our Board of Directors authorized a $5.0 billion stock repurchase program (“2020 Program”), with no fixed expiration. Purchases under the 2020 Program may be made in the open market or in privately negotiated transactions, but the program does not obligate us to repurchase any specific number of shares and may be amended, suspended or discontinued at any time. We started repurchases under the 2020 Program in December 2022.
The table below summarizes our stock repurchase activity for the three months ended March 31, 2024:

|  | Total Number of Shares Purchased (in thousands) |  | Average Price Paid per Share |  | Total Number of Shares Purchased as Part of Publicly Announced Programs (in thousands) |  | Approximate Dollar Value of Shares that May Yet Be Purchased Under the Programs (in millions)
January 1 - January 31, 2024 |  | 2,072 |  |  | $ | 82.17 |  |  | 1,815 |  |  | $ | 3,724 |
February 1 - February 29, 2024 |  | 1,916 |  |  | $ | 74.00 |  |  | 1,860 |  |  | $ | 3,587 |
March 1 - March 31, 2024 |  | 2,752 |  |  | $ | 74.24 |  |  | 1,529 |  |  | $ | 3,474 |
Total |  | 6,740 |  |  | $ | 76.61 |  |  | 5,204 |  |  |

_______________________________
(1) The difference between the total number of shares purchased and the total number of shares purchased as part of a publicly announced program is due to shares of common stock withheld by us from employee restricted stock awards in order to satisfy applicable tax withholding obligations.
Item 3. DEFAULTS UPON SENIOR SECURITIES
Not applicable.
Item 4. MINE SAFETY DISCLOSURES
Not applicable.
Item 5. OTHER INFORMATION
None of our directors or officers adopted, modified or terminated a Rule 10b5-1 trading arrangement or a non-Rule 10b5-1 trading arrangement during the quarter ended March 31, 2024, as such terms are defined under Item 408(a) of Regulation S-K.
Item 6. EXHIBITS
Reference is made to the Exhibit Index included herein.
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Exhibit Index

Exhibit Footnote | Exhibit Number |  | Description of Document
(1) | 2.1 |  | Agreement and Plan of Merger, dated February 11, 2024, among CymaBay Therapeutics, Inc., Registrant and Pacific Merger Sub, Inc.
(2) | 3.1 |  | Restated Certificate of Incorporation of Registrant
(3) | 3.2 |  | Amended and Restated Bylaws of Registrant
| 4.1 |  | Reference is made to Exhibit 3.1 and Exhibit 3.2
(4) | 4.2 |  | Indenture related to Senior Notes, dated as of March 30, 2011, between Registrant and Wells Fargo, National Association, as Trustee
(4) | 4.3 |  | First Supplemental Indenture related to Senior Notes, dated as of March 30, 2011, between Registrant and Wells Fargo, National Association, as Trustee (including form of Senior Notes)
(5) | 4.4 |  | Second Supplemental Indenture related to Senior Notes, dated as of December 13, 2011, between Registrant and Wells Fargo, National Association, as Trustee (including Form of 2041 Note)
(6) | 4.5 |  | Third Supplemental Indenture related to Senior Notes, dated as of March 7, 2014, between Registrant and Wells Fargo, National Association, as Trustee (including Form of 2024 Note and Form of 2044 Note)
(7) | 4.6 |  | Fourth Supplemental Indenture related to Senior Notes, dated as of November 17, 2014, between Registrant and Wells Fargo, National Association, as Trustee (including Form of 2025 Note and Form of 2045 Note)
(8) | 4.7 |  | Fifth Supplemental Indenture, dated as of September 14, 2015, between Registrant and Wells Fargo Bank, National Association, as Trustee (including Form of 2026 Note, Form of 2035 Note and Form of 2046 Note)
(9) | 4.8 |  | Sixth Supplemental Indenture, dated as of September 20, 2016, between Registrant and Wells Fargo Bank, National Association, as Trustee (including Form of 2027 Note, Form of 2036 Note and Form of 2047 Note)
10 | 4.9 |  | Eighth Supplemental Indenture, dated as of September 30, 2020, between the Registrant and Wells Fargo Bank, National Association, as Trustee (including Form of 2027 Note, Form of 2030 Note, Form of 2040 Note, and Form of 2050 Note)
(11) | 4.10 |  | Ninth Supplemental Indenture, dated as of September 14, 2023, between the Registrant and Computershare Trust Company, National Association, as successor to Wells Fargo Bank, National Association, as Trustee (including Form of 2033 Note and Form of 2053 Note)
(12) | 4.11 |  | Description of Registrant’s Securities
(13) | 10.1* |  | Gilead Sciences, Inc. 2004 Equity Incentive Plan, amended and restated May 10, 2017
(14) | 10.2* |  | Amendment No. 1 to Gilead Sciences, Inc. 2004 Equity Incentive Plan, amended and restated May 10, 2017
(15) | 10.3* |  | Gilead Sciences, Inc. 2022 Equity Incentive Plan
(16) | 10.4* |  | Form of employee stock option agreement under 2004 Equity Incentive Plan (for grants made in 2011 through 2018)
(17) | 10.5* |  | Form of global employee stock option agreement under 2004 Equity Incentive Plan (for grants made in 2019)
(18) | 10.6* |  | Form of global employee stock option agreement under 2004 Equity Incentive Plan (4 year vest) (for grants made in 2019)
(19) | 10.7* |  | Form of global employee stock option agreement under 2004 Equity Incentive Plan (4 year vest) (for grants made in 2020)
(20) | 10.8* |  | Form of global employee stock option agreement under 2004 Equity Incentive Plan (4 year vest) (for grants made in 2021)
(21) | 10.9* |  | Form of global employee stock option agreement under 2004 Equity Incentive Plan (4 year vest) (for certain grants made in 2022)
(22) | 10.10* |  | Form of global employee stock option agreement under 20 22 Equity Incentive Plan (4 year vest) (for certain grants made in 2022)
(23) | 10.11* |  | Form of global employee stock option agreement under 2022 Equity Incentive Plan (4 year vest) (for certain grants made in 2023)
| 10.12*,** |  | Form of global employee stock option agreement under 2022 Equity Incentive Plan (4 year vest) (for certain grants commencing in 2024)
(24) | 10.13* |  | Form of non-employee director stock op t i o n a g r e e m e n t u n d e r 2 0 0 4 E q u i t y I n c e n t i v e P l a n (f o r g r a n t s m a d e i n 2 0 1 4 t h r o u g h 2 0 1 8)
(17) | 10.14* |  | Form of non-employee director stock option agreement under 2004 Equity Incentive Plan (for grants made in 2019)
(25) | 10.15* |  | Form of non-employee director stock option agreement under 2004 Equity Incentive Plan (for grants made in 2020 and 2021)
(22) | 10.16* |  | Form of non-employee director stock option agreement under 2022 Equity Incentive Plan (for grants made in 2022)
(26) | 10.17* |  | Form of non-employee director stock option agreement under 2022 Equity Incentive Plan (for grants made in 2023)
(19) | 10.18* |  | Form of performance share award agreement - TSR Goals (U.S.) under 2004 Equity Incentive Plan (for grants made in 2020)
(20) | 10.19* |  | Form of performance share award agreement - TSR Goals (U.S.) under 2004 Equity Incentive Plan (for grants made in 2021)
(21) | 10.20* |  | Form of performance share award agreement - TSR Goals (U.S.) under 2004 Equity Incentive Plan (for grants made in 2022)
(23) | 10.21* |  | Form of performance share award agreement - TSR Goals (U.S.) under 2022 Equity Incentive Plan (for grants made in 2023)
| 10.22*,** |  | Form of performance share award agreement - TSR Goals (U.S.) under 2022 Equity Incentive Plan (for grants commencing in 2024)

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(19) | 10.23* |  | Form of performance share award agreement - Revenue Goals (U.S.) under 2004 Equity Incentive Plan (for grants made in 2020)
(20) | 10.24* |  | Form of performance share award agreement - Revenue Goals (U.S.) under 2004 Equity Incentive Plan (for grants made in 2021)
(21) | 10.25* |  | Form of performance share award agreement - Revenue Goals (U.S.) under 2004 Equity Incentive Plan (for grants made in 2022)
(23) | 10.26* |  | Form of performance share award agreement - Revenue Goals (U.S.) under 2022 Equity Incentive Plan (for grants made in 2023)
| 10.27*,** |  | Form of performance share award agreement - Revenue Goals (U.S.) under 2022 Equity Incentive Plan (for grants commencing in 2024)
(17) | 10.28* |  | Form of global employee restricted stock unit issuance agreement under 2004 Equity Incentive Plan (for grants made in 2019)
(18) | 10.29* |  | Form of global employee restricted stock unit issuance agreement under 2004 Equity Incentive Plan (4 year vest) (for grants made in 2019)
(19) | 10.30* |  | Form of global employee restricted stock unit issuance agreement under 2004 Equity Incentive Plan (4 year vest) (for grants made in 2020)
(20) | 10.31* |  | Form of global employee restricted stock unit issuance agreement under 2004 Equity Incentive Plan (4 year vest) (for grants made in 2021)
(21) | 10.32* |  | Form of global employee restricted stock unit issuance agreement under 2004 Equity Incentive Plan (4 year vest) (for certain grants made in 2022)
(22) | 10.33* |  | Form of global employee restricted stock unit agreement under 2022 Equity Incentive Plan (4 year vest) (for certain grants made in 2022)
(23) | 10.34* |  | Form of global employee restricted stock unit agreement under 2022 Equity Incentive Plan (4 year vest) (for grants made in 2023)
| 10.35*,** |  | Form of global employee restricted stock unit agreement under 2022 Equity Incentive Plan (4 year vest) (for grants commencing in 2024)
(26) | 10.36* |  | Form of non-employee director restricted stock unit agreement under 2022 Equity Incentive Plan (for grants made in 2023)
(25) | 10.37* |  | Gilead Sciences, Inc. 2018 Equity Incentive Plan, amended and restated April 7, 2020
(27) | 10.38* |  | Gilead Sciences, Inc. Employee Stock Purchase Plan, amended and restated January 25, 2023
(17) | 10.39* |  | Gilead Sciences, Inc. 2005 Deferred Compensation Plan, amended and restated April 19, 2016
(25) | 10.40* |  | Gilead Sciences, Inc. Severance Plan, amended and restated May 5, 2020
(28) | 10.41* |  | Gilead Sciences, Inc. Corporate Annual Incentive Plan, amended and restated August 1, 2023
(29) | 10.42* |  | Offer Letter between Registrant and Daniel O’Day, dated November 30, 2018
(17) | 10.43* |  | Stock option agreement for Daniel O’Day under 2004 Equity Incentive Plan
(17) | 10.44* |  | Form of restricted stock unit issuance agreement for Daniel O’Day (in 2019) under 2004 Equity Incentive Plan
(17) | 10.45* |  | Offer Letter between Registrant and Johanna Mercier, dated May 21, 2019
(19) | 10.46* |  | Global stock option agreement for Johanna Mercier (in 2019) under 2004 Equity Incentive Plan
(19) | 10.47* |  | Restricted stock unit issuance agreement for Johanna Mercier (for Performance Objectives in 2019-2020) under 2004 Equity Incentive Plan
(19) | 10.48* |  | Offer Letter between Registrant and Merdad Parsey, dated September 29, 2019
(19) | 10.49* |  | Global stock option agreement for Merdad Parsey (in 2019) under 2004 Equity Incentive Plan
(23) | 10.50* |  | Offer Letter between Registrant and Deborah Telman, dated June 2, 2022
(23) | 10.51* |  | Global stock option agreement for Deborah Telman under 2022 Equity Incentive Plan
(23) | 10.52* |  | Global restricted stock unit issuance agreement for Deborah Telman under 2022 Equity Incentive Plan (3 year vest)
(23) | 10.53* |  | Global restricted stock unit issuance agreement for Deborah Telman under 2022 Equity Incentive Plan (4 year vest)
(30) | 10.54* |  | Form of Indemnity Agreement entered into between Registrant and its directors and executive officers
(30) | 10.55* |  | Form of Employee Proprietary Information and Invention Agreement entered into between Registrant and certain of its officers and key employees
(31) | 10.56* |  | Form of Employee Proprietary Information and Invention Agreement entered into between Registrant and certain of its officers and key employees (revised September 2006)
+(32) | 10.57* |  | Amendment Agreement, dated October 25, 1993, between Registrant, the Institute of Organic Chemistry and Biochemistry (IOCB) and Rega Stichting v.z.w. (REGA), together with the following exhibits: the License Agreement, dated December 15, 1991, between Registrant, IOCB and REGA (the 1991 License Agreement); the License Agreement, dated October 15, 1992, between Registrant, IOCB and REGA (the October 1992 License Agreement); and the License Agreement, dated December 1, 1992, between Registrant, IOCB and REGA (the December 1992 License Agreement)
+(33) | 10.58* |  | Amendment Agreement between Registrant and IOCB/REGA, dated December 27, 2000, amending the 1991 License Agreement and the December 1992 License Agreement
+(34) | 10.59 |  | Sixth Amendment Agreement to the License Agreement, between IOCB/REGA and Registrant, dated August 18, 2006, amending the October 1992 License Agreement and the December 1992 License Agreement
+(35) | 10.60 |  | Seventh Amendment Agreement to the License Agreement, between IOCB/REGA and Registrant, dated July 1, 2013, amending the October 1992 License Agreement and the December 1992 License Agreement

49

+(36) | 10.61 |  | Exclusive License Agreement by and between Registrant (as successor to Triangle Pharmaceuticals, Inc.), Glaxo Group Limited, The Wellcome Foundation Limited, Glaxo Wellcome Inc. and Emory University, dated May 6, 1999
+(37) | 10.62 |  | Royalty Sale Agreement by and among Registrant, Emory University and Investors Trust & Custodial Services (Ireland) Limited, solely in its capacity as Trustee of Royalty Pharma, dated July 18, 2005
+(37) | 10.63 |  | Amended and Restated License Agreement by and between Registrant, Emory University and Investors Trust & Custodial Services (Ireland) Limited, solely in its capacity as Trustee of Royalty Pharma, dated July 21, 2005
++(38) | 10.64 |  | Amended and Restated EVG License Agreement by and between Japan Tobacco Inc. and Registrant, dated November 29, 2018
++(38) | 10.65 |  | Master Agreement by and between Registrant, Gilead Sciences K.K. and Japan Tobacco Inc., dated November 29, 2018
+(39) | 10.66 |  | Amended and Restated Collaboration Agreement by and among Registrant, Gilead Sciences Ireland UC (formerly Gilead Sciences Limited) and Janssen R&D Ireland, dated December 23, 2014
+(40) | 10.67 |  | License Agreement by and among Kite Pharma, Inc., Cabaret Biotech Ltd. and Dr. Zelig Eshhar, dated December 12, 2013
++(18) | 10.68 |  | Option, License and Collaboration Agreement by and between Galapagos NV and Registrant, dated July 14, 2019
| 31.1** |  | Certification of Chief Executive Officer, as required by Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended
| 31.2** |  | Certification of Chief Financial Officer, as required by Rule 13a-14(a) or Rule 15d-14(a) of the Securities Exchange Act of 1934, as amended
| 32*** |  | Certifications of Chief Executive Officer and Chief Financial Officer, as required by Rule 13a-14(b) or Rule 15d-14(b) and Section 1350 of Chapter 63 of Title 18 of the United States Code (18 U.S.C. §1350)
(41) | 97.1 |  | Gilead Sciences, Inc. Compensation Recovery Policy
| 101.INS** |  | XBRL Instance Document - The instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document
| 101.SCH** |  | Inline XBRL Taxonomy Extension Schema Document
| 101.CAL** |  | Inline XBRL Taxonomy Extension Calculation Linkbase Document
| 101.DEF** |  | Inline XBRL Taxonomy Extension Definition Linkbase Document
| 101.LAB** |  | Inline XBRL Taxonomy Extension Label Linkbase Document
| 101.PRE** |  | Inline XBRL Taxonomy Extension Presentation Linkbase Document
| 104 |  | Cover Page Interactive Data File, formatted in Inline XBRL (included as Exhibit 101)

(1) Filed as an exhibit to Registrant’s Current Report on Form 8-K filed on February 12, 2024, and incorporated herein by reference.
(2) Filed as an exhibit to Registrant’s Current Report on Form 8-K filed on May 9, 2019, and incorporated herein by reference.
(3) Filed as an exhibit to Registrant’s Current Report on Form 8-K filed on February 6, 2023, and incorporated herein by reference.
(4) Filed as an exhibit to Registrant’s Current Report on Form 8-K filed on April 1, 2011, and incorporated herein by reference.
(5) Filed as an exhibit to Registrant’s Current Report on Form 8-K filed on December 13, 2011, and incorporated herein by reference.
(6) Filed as an exhibit to Registrant’s Current Report on Form 8-K filed on March 7, 2014, and incorporated herein by reference.
(7) Filed as an exhibit to Registrant’s Current Report on Form 8-K filed on November 17, 2014, and incorporated herein by reference.
(8) Filed as an exhibit to Registrant’s Current Report on Form 8-K filed on September 14, 2015, and incorporated herein by reference.
(9) Filed as an exhibit to Registrant’s Current Report on Form 8-K filed on September 20, 2016, and incorporated herein by reference.
(10) Filed as an exhibit to Registrant’s Current Report on Form 8-K filed on September 30, 2020, and incorporated herein by reference.
(11) Filed as an exhibit to Registrant’s Current Report on Form 8-K filed on September 14, 2023, and incorporated herein by reference.
(12) Filed as an exhibit to Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2019, and incorporated herein by reference.
(13) Filed as an exhibit to Registrant’s Current Report on Form 8-K filed on May 12, 2017, and incorporated herein by reference.
(14) Filed as an exhibit to Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2020, and incorporated herein by reference.
(15) Filed as an exhibit to Registrant’s Current Report on Form 8-K filed on May 5, 2022, and incorporated herein by reference.
(16) Filed as an exhibit to Registrant’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2011, and incorporated herein by reference.
(17) Filed as an exhibit to Registrant’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2019, and incorporated herein by reference.
(18) Filed as an exhibit to Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2019, and incorporated herein by reference.
(19) Filed as an exhibit to Registrant’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2020, and incorporated herein by reference.
(20) Filed as an exhibit to Registrant’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2021, and incorporated herein by reference.
(21) Filed as an exhibit to Registrant’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2022, and incorporated herein by reference.
(22) Filed as an exhibit to Registrant’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2022, and incorporated herein by reference.
(23) Filed as an exhibit to Registrant’s Quarterly Report on Form 10-Q for the quarter ended March 31, 2023, and incorporated herein by reference.
(24) Filed as an exhibit to Registrant’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2014, and incorporated herein by reference.
(25) Filed as an exhibit to Registrant’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2020, and incorporated herein by reference.
(26) Filed as an exhibit to Registrant’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2023, and incorporated herein by reference.
(27) Filed as an exhibit to Registrant’s Current Report on Form 8-K filed on May 5, 2023, and incorporated herein by reference.
(28) Filed as an exhibit to Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2023, and incorporated herein by reference.
(29) Filed as an exhibit to Registrant’s Current Report on Form 8-K filed on December 10, 2018, and incorporated herein by reference.
(30) Filed as an exhibit to Registrant’s Registration Statement on Form S-1 (No. 33-55680), as amended, and incorporated herein by reference.
(31) Filed as an exhibit to Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2006, and incorporated herein by reference.
(32) Filed as an exhibit to Registrant’s Annual Report on Form 10-K for the fiscal year ended March 31, 1994, and incorporated herein by reference.
(33) Filed as an exhibit to Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2000, and incorporated herein by reference.
(34) Filed as an exhibit to Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2006, and incorporated herein by reference.
(35) Filed as an exhibit to Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2013, and incorporated herein by reference.
(36) Filed as an exhibit to Triangle Pharmaceuticals, Inc.’s Quarterly Report on Form 10-Q/A filed on November 3, 1999, and incorporated herein by reference.
(37) Filed as an exhibit to Registrant’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2005, and incorporated herein by reference.
(38) Filed as an exhibit to Registrant’s Amendment No. 1 to Annual Report on Form 10-K/A filed on April 18, 2019, and incorporated herein by reference.
(39) Filed as an exhibit to Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2014, and incorporated herein by reference.
(40) Filed as an exhibit to Kite Pharma, Inc.’s Registration Statement on Form S-1/A (No. 333-196081) filed on June 17, 2014, and incorporated herein by reference.
50

(41) Filed as an exhibit to Registrant’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023, and incorporated herein by reference.
* Management contract or compensatory plan or arrangement.
** Filed herewith.
*** Furnished herewith.
+ Certain confidential portions of this Exhibit were omitted by means of marking such portions with an asterisk (the Mark). This Exhibit has been filed separately with the Secretary of the Securities and Exchange Commission without the Mark pursuant to Registrant’s Application Requesting Confidential Treatment under Rule 24b-2 under the Securities Exchange Act of 1934, as amended.
++ Certain portions of this Exhibit were omitted by means of marking such portions with the Mark because the identified portions are (i) private or confidential and (ii) not material.
51

SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

|  | GILEAD SCIENCES, INC.
|  | (Registrant)
Date: | May 8, 2024 | /s/ DANIEL P. O’DAY
|  | Daniel P. O’Day Chairman and Chief Executive Officer (Principal Executive Officer)
Date: | May 8, 2024 | /s/ ANDREW D. DICKINSON
|  | Andrew D. Dickinson Chief Financial Officer (Principal Financial Officer)

52