Subsequent Events	9 Months Ended
Sep. 30, 2026
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Dividends and Distributions On October 29, 2026, the board of directors of Tradeweb Markets Inc. declared a cash dividend of $0.14 per share of Class A common stock and Class B common stock for the fourth quarter of 2026. This dividend will be payable on December 15, 2026 to stockholders of record as of December 1, 2026. On October 29, 2026, Tradeweb Markets Inc., as the sole manager, approved distributions to be made during the fourth quarter of 2026 by TWM LLC to its equityholders, including Tradeweb Markets Inc., in an aggregate amount of $162.0 million, as adjusted by required state and local tax withholdings that will be determined prior to the record date. Acquisition of Trumid On October 19, 2026, the Company entered into a definitive agreement (the “Trumid Transaction Agreement”) for Tradeweb Markets LLC to acquire directly and indirectly all of the outstanding equity interests of Trumid Holdings, LLC (“Trumid”). Trumid is a financial technology company and electronic trading platform focused on U.S dollar-denominated investment grade, high yield, distressed and emerging market bonds. Trumid’s platform supports trading in bonds prior to their issuance (referred to as “grey market trading”) and early market trading and includes trading protocols, such as RFQ, Attributed Trading and Swarms, a protocol which is designed to bring a group of participants together on the same bond at particular times throughout the day. Pursuant to the terms of the Trumid Transaction Agreement, the total purchase price is $1.97 billion, which will consist of $1.89 billion payable in cash, subject to customary adjustments for cash acquired, indebtedness, net working capital and transaction expenses, and 773,900 LLC Interests (the “Trumid LLC Interests”) and corresponding shares of the Class C common stock, representing per the Trumid Transaction Agreement, $82.0 million in equity based on the volume-weighted average price of the Class A common stock over the five trading days prior to the date of the Trumid Transaction Agreement. The closing of the acquisition is subject to the satisfaction of regulatory approvals as well as other customary closing conditions. The Trumid LLC Interests will be redeemable or exchangeable on a one-for-one basis for shares of the Class A common stock, or at the Company’s option, in cash. The Trumid Transaction Agreement contains certain termination rights for Tradeweb Markets LLC and Trumid and, subject to certain limitations set forth therein, may be terminated by either Tradeweb Markets LLC or Trumid if the acquisition closing has not occurred on or before October 19, 2027 (as such date may be extended in accordance with the terms of the Trumid Transaction Agreement to a maximum of twenty-four (24) months after the date of the Trumid Transaction Agreement). The acquisition is currently targeted to close in the first half 2027, although no assurance can be given in that regard. In addition, if the Trumid Transaction Agreement is terminated under certain circumstances, Tradeweb Markets LLC will be obligated to pay Trumid a termination fee of $105.0 million.

On October 29, 2026, the board of directors of Tradeweb Markets Inc. declared a cash dividend of $0.14 per share of Class A common stock and Class B common stock for the fourth quarter of 2026. This dividend will be payable on December 15, 2026 to stockholders of record as of December 1, 2026.

On October 29, 2026, Tradeweb Markets Inc., as the sole manager, approved distributions to be made during the fourth quarter of 2026 by TWM LLC to its equityholders, including Tradeweb Markets Inc., in an aggregate amount of $162.0 million, as adjusted by required state and local tax withholdings that will be determined prior to the record date.

On October 19, 2026, the Company entered into a definitive agreement (the “Trumid Transaction Agreement”) for Tradeweb Markets LLC to acquire directly and indirectly all of the outstanding equity interests of Trumid Holdings, LLC (“Trumid”). Trumid is a financial technology company and electronic trading platform focused on U.S dollar-denominated investment grade, high yield, distressed and emerging market bonds. Trumid’s platform supports trading in bonds prior to their issuance (referred to as “grey market trading”) and early market trading and includes trading protocols, such as RFQ, Attributed Trading and Swarms, a protocol which is designed to bring a group of participants together on the same bond at particular times throughout the day.

Pursuant to the terms of the Trumid Transaction Agreement, the total purchase price is $1.97 billion, which will consist of $1.89 billion payable in cash, subject to customary adjustments for cash acquired, indebtedness, net working capital and transaction expenses, and 773,900 LLC Interests (the “Trumid LLC Interests”) and corresponding shares of the Class C common stock, representing per the Trumid Transaction Agreement, $82.0 million in equity based on the volume-weighted average price of the Class A common stock over the five trading days prior to the date of the Trumid Transaction Agreement. The closing of the acquisition is subject to the satisfaction of regulatory approvals as well as other customary closing conditions.

The Trumid LLC Interests will be redeemable or exchangeable on a one-for-one basis for shares of the Class A common stock, or at the Company’s option, in cash.

The Trumid Transaction Agreement contains certain termination rights for Tradeweb Markets LLC and Trumid and, subject to certain limitations set forth therein, may be terminated by either Tradeweb Markets LLC or Trumid if the acquisition closing has not occurred on or before October 19, 2027 (as such date may be extended in accordance with the terms of the Trumid Transaction Agreement to a maximum of twenty-four (24) months after the date of the Trumid Transaction Agreement). The acquisition is currently targeted to close in the first half 2027, although no assurance can be given in that regard. In addition, if the Trumid Transaction Agreement is terminated under certain circumstances, Tradeweb Markets LLC will be obligated to pay Trumid a termination fee of $105.0 million.