X0306 4 2021-09-10 0001758730 Tradeweb Markets Inc. TW 0001771402 Maisey Simon TRADEWEB MARKETS INC. 1177 AVENUE OF THE AMERICAS NEW YORK NY 10036 true Managing Director, Corp. Dev. Class A common stock 2021-09-10 4 S 0 750 87.5 D 82197 D This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on December 15, 2020. This amount includes (i) 39,604 unvested restricted stock units ("RSUs") in respect of the issuer's Class A common stock ("Class A Common Stock") which are scheduled to vest on January 1, 2022, (ii) 6,860 unvested RSUs in respect of Class A Common Stock which are scheduled to vest in equal installments on each of March 17, 2022 and March 17, 2023, (iii) 20,580 unvested RSUs in respect of Class A Common Stock which are scheduled to vest on January 1, 2023, and (iv) 5,825 unvested RSUs in respect of Class A Common Stock which are scheduled to vest in equal installments on each of the first, second and third anniversaries of March 15, 2021, in each case subject to the reporting person's continued employment through the applicable vesting date. /s/ Scott Zucker, Attorney-in-Fact for Simon Maisey 2021-09-10