v3.25.4

Fair Value of Financial Instruments and Other Assets - Changes in Fair Value (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Total realized and unrealized gains included in other comprehensive income (loss)	$ 14,000,000.0	$ 0
Debt Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	10,354,000	0
Additions	518,000	10,354,000
Dispositions	0	0
Total realized and unrealized gains included in other comprehensive income (loss)	13,985,000	0
Ending balance	24,857,000	10,354,000
Digital Assets
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	852,000	0
Additions	0	666,000
Dispositions	0	0
Total realized and unrealized gains included in other income (loss), net	0	186,000
Transfer out of Level 3	(852,000)	0
Ending balance	0	852,000
Canton coins
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	852,000	0
Additions	10,947,000	666,000
Dispositions	(15,000,000)	0
Origination of digital asset loan receivable	(24,999,000)	0
Total realized and unrealized gains included in other income (loss), net	$ 270,929,000	186,000
Fair Value, Asset, Recurring Basis, Unobservable Input Reconciliation, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Other income (loss), net
Ending balance	$ 242,729,000	852,000
Realized gains	39,800,000
Unrealized gains	$ 231,100,000	$ 200,000

Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Origination Of Digital Asset Loan Receivable

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount of gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).

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Amount of gain (loss) recognized in other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3).

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Amount of purchases of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of sale of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

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Amount of transfers of financial instrument classified as an asset out of level 3 of the fair value hierarchy.

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Indicates line item in statement of income or comprehensive income that includes gain (loss) from asset measured at fair value using unobservable input (level 3).

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Amount of realized gain (loss) on investment.

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Tradeweb Markets Inc. 10-K