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Fair Value of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2025
Fair Value Disclosures [Abstract]  
Valuation of Financial Instruments by Pricing Observability Levels
The following table summarizes the valuation of the Company's financial instruments by pricing observability levels defined in ASC 820 as of December 31, 2025:
Counterparty
and Cash
Collateral
(Amounts in thousands)Level ILevel IILevel IIINetting (1)Total
Assets
Financial instruments and other inventory positions owned:
Corporate securities:
Convertible securities$— $140,306 $— $— $140,306 
Fixed income securities— 2,831 — — 2,831 
Municipal securities:
Taxable securities— 33,021 — — 33,021 
Tax-exempt securities— 125,419 — — 125,419 
Short-term securities— 19,531 — — 19,531 
Asset-backed securities
— 92,472 — — 92,472 
U.S. government agency securities— 82,666 — — 82,666 
U.S. government securities201 — — — 201 
Derivative contracts— 5,744 2,352 (2,273)5,823 
Total financial instruments and other inventory positions owned201 501,990 2,352 (2,273)502,270 
Cash equivalents717,600 — — — 717,600 
Investments at fair value (2)87,507 — 217,966 — 305,473 
Total assets$805,308 $501,990 $220,318 $(2,273)$1,525,343 
Liabilities
Financial instruments and other inventory positions sold, but not yet purchased:
Corporate securities:
Fixed income securities$— $3,300 $— $— $3,300 
U.S. government securities43,403 — — — 43,403 
Derivative contracts— 4,039 6,534 (8,762)1,811 
Total financial instruments and other inventory positions sold, but not yet purchased$43,403 $7,339 $6,534 $(8,762)$48,514 
(1)Represents cash collateral and the impact of netting on a counterparty basis. The Company had no securities posted as collateral to its counterparties.
(2)Includes noncontrolling interests of $216.8 million attributable to unrelated third-party ownership in consolidated alternative asset management funds, of which $171.8 million is classified as Level III.

At December 31, 2025, the Company's Level I investments at fair value included $8.3 million of equity securities subject to contractual sale restrictions which will expire in the first quarter of 2027.
The following table summarizes the valuation of the Company's financial instruments by pricing observability levels defined in ASC 820 as of December 31, 2024:
Counterparty
and Cash
Collateral
(Amounts in thousands)Level ILevel IILevel IIINetting (1)Total
Assets
Financial instruments and other inventory positions owned:
Corporate securities:
Convertible securities$— $136,176 $— $— $136,176 
Equity securities— — — 
Fixed income securities— 1,583 — — 1,583 
Municipal securities:
Taxable securities— 21,171 — — 21,171 
Tax-exempt securities— 126,672 273 — 126,945 
Short-term securities— 1,075 — — 1,075 
Asset-backed securities
— 50,188 — — 50,188 
U.S. government agency securities— 78,256 — — 78,256 
U.S. government securities4,633 — — — 4,633 
Derivative contracts— 10,185 1,819 (6,305)5,699 
Total financial instruments and other inventory positions owned4,635 425,306 2,092 (6,305)425,728 
Cash equivalents446,844 — — — 446,844 
Investments at fair value (2)90,348 — 176,970 — 267,318 
Total assets$541,827 $425,306 $179,062 $(6,305)$1,139,890 
Liabilities
Financial instruments and other inventory positions sold, but not yet purchased:
Corporate securities:
Equity securities$19,740 $— $— $— $19,740 
Fixed income securities— 614 — — 614 
U.S. government securities54,249 — — — 54,249 
Derivative contracts— 8,080 991 (6,692)2,379 
Total financial instruments and other inventory positions sold, but not yet purchased$73,989 $8,694 $991 $(6,692)$76,982 
(1)Represents cash collateral and the impact of netting on a counterparty basis. The Company had no securities posted as collateral to its counterparties.
(2)Includes noncontrolling interests of $187.6 million attributable to unrelated third-party ownership in consolidated alternative asset management funds, of which $136.3 million is classified as Level III.
Changes in Fair Value Associated with Level III Financial Instruments
The following table summarizes the changes in fair value associated with Level III financial instruments held at the beginning or end of the periods presented:
Level III
AssetsLiabilities
(Amounts in thousands)
Tax-Exempt
Municipal Securities
Derivative ContractsInvestments at
Fair Value
Derivative Contracts
Balance at December 31, 2023$2,869 $5,834 $224,280 $7,962 
Purchases— — 38,378 — 
Sales(1,901)— (41,042)— 
Settlements— (4,097)— (6,191)
Transfers in (1)
— — — — 
Transfers out (2)
— — (48,546)— 
Total realized and unrealized gains/(losses)(695)82 3,900 (780)
Balance at December 31, 2024$273 $1,819 $176,970 $991 
Purchases— — 35,334 — 
Sales— — (248)— 
Settlements— (2,705)— (2,475)
Transfers in (1)
— — 963 — 
Transfers out (2)
(276)— (8,182)— 
Total realized and unrealized gains/(losses)3,238 13,129 8,018 
Balance at December 31, 2025$ $2,352 $217,966 $6,534 
Unrealized gains/(losses) for assets/liabilities held at:
December 31, 2024
$$1,819 $(28,420)$991 
December 31, 2025
$— $2,352 $19,684 $6,534 
(1)Transfers into Level III are primarily due to observable inputs becoming unobservable.
(2)Transfers out of Level III are primarily due to unobservable inputs becoming observable.
Information about Significant Unobservable Inputs used in Fair Value Measurement
The following table summarizes quantitative information about the significant unobservable inputs used in the fair value measurement of the Company's Level III financial instruments as of December 31, 2025:
ValuationWeighted
TechniqueUnobservable InputRangeAverage (1)
Assets
Derivative contractsDiscounted cash flowPremium over the MMD curve in basis points ("bps") (3)
0 - 26 bps
8.0 bps
Investments at fair value (2)
Market approachRevenue multiple (3)
2 - 10 times
6.7 times
EBITDA multiple (3)
11 - 19 times
14.5 times
Equity value as multiple of independent financing value (3)
1 - 3 times
2.0 times
Discounted cash flowDiscount rate (4)
15 - 25%
21.3%
Liabilities
Derivative contracts
Discounted cash flowPremium over the MMD curve in bps (4)
0 - 46 bps
11.8 bps
(1)Unobservable inputs were weighted by the relative fair value of the financial instruments.
(2)As of December 31, 2025, the Company had $218.0 million of Level III investments at fair value, of which $54.4 million was valued based on a recent round of independent financing.
(3)There is uncertainty in the determination of fair value. Significant increase/(decrease) in the unobservable input in isolation would have resulted in a significantly higher/(lower) fair value measurement.
(4)There is uncertainty in the determination of fair value. Significant increase/(decrease) in the unobservable input in isolation would have resulted in a significantly lower/(higher) fair value measurement.