Statement of Changes in Beneficial Ownership (4)

FORM 4 [ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^* Olesky Lee	2. Issuer Name and Ticker or Trading Symbol Tradeweb Markets Inc. [ TW ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) __X__ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) Chief Executive Officer
(Last) (First) (Middle) TRADEWEB MARKETS INC., 1177 AVENUE OF THE AMERICAS	3. Date of Earliest Transaction (MM/DD/YYYY) 8/27/2021
(Street) NEW YORK, NY 10036 (City) (State) (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) _X _ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Class A common stock	8/27/2021		M⁽¹⁾		9837	A	$20.59	483294 ⁽²⁾	D
Class A common stock	8/27/2021		S⁽¹⁾		9837	D	$89.0158 ⁽³⁾	473457 ⁽²⁾	D
Class A common stock	8/30/2021		M⁽¹⁾		32769	A	$20.59	506226 ⁽²⁾	D
Class A common stock	8/30/2021		S⁽¹⁾		32769	D	$89.3198 ⁽⁴⁾	473457 ⁽²⁾	D
Class A common stock								20000	I	See footnote ⁽⁵⁾

*Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)*
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option (Right to Buy)	$20.59	8/27/2021		M ⁽¹⁾			9837	⁽⁶⁾	10/26/2028	Class A common stock	9837	$0	762948	D
Stock Option (Right to Buy)	$20.59	8/30/2021		M ⁽¹⁾			32769	⁽⁶⁾	10/26/2028	Class A common stock	32769	$0	730179	D

Explanation of Responses:
(1)	This transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 6, 2021.
(2)	This amount includes (i) 298,526 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) 34,302 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) 102,906 unvested RSUs in respect of Class A Common Stock which are scheduled to vest on January 1, 2023, and (iv) 29,665 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.
(3)	The price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.00 to $89.11, 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 footnotes 3 and 4 to this Form 4.
(4)	The price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.00 to $89.81, inclusive.
(5)	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.
(6)	The option is fully vested and exercisable as of the date hereof.

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
Olesky Lee TRADEWEB MARKETS INC. 1177 AVENUE OF THE AMERICAS NEW YORK, NY 10036	X		Chief Executive Officer