X0306 4 2020-04-27 0001758730 Tradeweb Markets Inc. TW 0001771195 Olesky Lee TRADEWEB MARKETS INC. 1177 AVENUE OF THE AMERICAS NEW YORK NY 10036 true true Chief Executive Officer Class A common stock 2020-04-27 4 D 0 280552 48.79 D 557692 D Class A common stock 20000 I See footnote This amount represents the $50.25 per-share price at which shares of the issuer's Class A common stock (the "Class A Common Stock") were sold in a public offering of the Class A Common Stock, less the underwriters' discount of $1.46 per share. This amount includes (i) 207,713 unvested restricted stock units ("RSUs") in respect of Class A Common Stock which are scheduled to vest on January 1, 2021, (ii) 298,526 unvested RSUs in respect of Class A Common Stock which are scheduled to vest on January 1, 2022, and (iii) 51,453 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 17, 2020, in each case subject to the reporting person's continued employment through the applicable vesting date. The reporting person owns these securities through The Lee Olesky 2019 Family Trust U/A/D March 21, 2019 ("The Family Trust"). The reporting person and his wife, as the co-trustees of The Family Trust, share the power to vote and invest the securities, but each disclaims beneficial ownership of such securities except to the extent of his or her pecuniary interest therein. /s/ Scott Zucker, Attorney-in-Fact for Lee Olesky 2020-04-28