X0508 4 2026-02-10 0 0001758730 Tradeweb Markets Inc. TW 0001807231 Peterson Justin TRADEWEB MARKETS INC. 245 PARK AVENUE NEW YORK NY 10167 0 1 0 0 Chief Technology Officer 1 Class A common stock 2026-02-10 4 S 0 11254 115.4686 D 58841 D This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 3, 2025. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $113.525 to $116.86, 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 ranges set forth in this footnote. This amount includes (i) 4,576 unvested restricted stock units ("RSUs") in respect of the issuer's Class A common stock ("Class A Common Stock") that are scheduled to vest on March 15, 2026, (ii) 5,095 unvested RSUs in respect of Class A Common Stock that are scheduled to vest in equal installments on March 15, 2026 and March 15, 2027, and (iii) 6,728 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. /s/ Douglas Friedman, Attorney-in-Fact for Justin Peterson 2026-02-12