X0306 4 2021-06-15 0001758730 Tradeweb Markets Inc. TW 0001807231 Peterson Justin TRADEWEB MARKETS INC. 1177 AVENUE OF THE AMERICAS NEW YORK NY 10036 true Chief Technology Officer Class A common stock 2021-06-15 4 M 0 20000 20.59 A 101618 D Class A common stock 2021-06-15 4 S 0 20000 84.6072 D 81618 D Stock Option (Right to Buy) 20.59 2021-06-15 4 M 0 20000 0 D 2028-10-26 Class A common stock 20000 112124 D This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 6, 2021. This amount includes (i) 35,204 unvested restricted stock units ("RSUs") in respect of issuer's Class A common stock ("Class A Common Stock") which are scheduled to vest on January 1, 2022, (ii) 8,575 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) 25,726 unvested RSUs in respect of Class A Common Stock which are scheduled to vest on January 1, 2023, and (iv) 10,113 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. The price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $84.50 to $84.97, inclusive. The reporting person undertakes to provide the issuer, any security holder of the issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote 3 to this Form 4. The option is fully vested and exercisable as of the date hereof. /s/ Scott Zucker, Attorney-in-Fact for Justin Peterson 2021-06-16