X0508 4 2026-01-01 0 0001758730 Tradeweb Markets Inc. TW 0002030787 Clack Amy TRADEWEB MARKETS INC. 245 PARK AVENUE NEW YORK NY 10167 0 1 0 0 CAO and CRO 0 Class A common stock 2026-01-01 4 F 0 2020 106.20 D 18180 D Class A common stock 2026-01-01 4 A 0 21 0 A 18201 D Represents shares withheld by the issuer to satisfy the tax withholding obligation associated with the settlement of restricted stock units ("RSUs") in respect of the issuer's Class A common stock ("Class A Common Stock") held by the reporting person. This amount includes (i) 2,434 unvested RSUs in respect of Class A Common Stock that are scheduled to vest on January 1, 2027, (ii) 2,434 unvested RSUs in respect of Class A Common Stock that are scheduled to vest on January 1, 2028, and (iii) 6,627 unvested RSUs in respect of Class A Common Stock that are scheduled to vest in equal installments on March 17, 2026, March 17, 2027 and March 17, 2028, in each case, subject to the reporting person's continued employment through the applicable vesting date. Represents shares of Class A Common Stock acquired in connection with the settlement of certain dividend equivalent rights (the "DERs"). The DERs were granted in connection with previously awarded RSUs, and settled in shares of Class A Common Stock in connection with the settlement of the RSUs to which they relate. /s/ Douglas Friedman, Attorney-in-Fact for Amy Clack 2026-01-05