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

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
York Parent Ltd
  2. Issuer Name and Ticker or Trading Symbol
Tradeweb Markets Inc. [TW]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
(Last)
(First)
(Middle)
C/O THE BLACKSTONE GROUP INC., 345 PARK AVENUE
3. Date of Earliest Transaction (Month/Day/Year)
01/29/2021
(Street)

NEW YORK, NY 10154
4. If Amendment, Date Original Filed (Month/Day/Year)
6. Individual or Joint/Group Filing (Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)
2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction 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)
Code V Amount (A) or (D) Price

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)
2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction 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
(Month/Day/Year)
7. Title and Amount of Underlying Securities
(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)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Class B Common Stock (2) 01/29/2021   S (1)     96,933,192   (2)   (2) Class A Common Stock 96,933,192 (1) 0 I See Footnotes (5) (7) (8) (9) (10) (11)
Class D Common Stock (3) (4) 01/29/2021   S (1)     22,988,329   (3) (4)   (3) (4) Class C Common Stock 22,988,329 (1) 0 I See Footnotes (6) (7) (8) (9) (10) (11)
Non-voting common units of Tradeweb Markets LLC (4) 01/29/2021   S (1)     22,988,329   (4)   (4) Class A Common Stock (3) (4) 22,988,329 (1) 0 I See Footnotes (6) (7) (8) (9) (10) (11)

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
York Parent Ltd
C/O THE BLACKSTONE GROUP INC.
345 PARK AVENUE
NEW YORK, NY 10154
    X    
BCP York Holdings (Delaware) L.P.
C/O THE BLACKSTONE GROUP INC.
345 PARK AVENUE
NEW YORK, NY 10154
    X    
BCP York Holdings GP (Delaware) L.L.C.
C/O THE BLACKSTONE GROUP INC.
345 PARK AVENUE
NEW YORK, NY 10154
    X    
BCP York Subsidiary (Cayman) L.P.
C/O THE BLACKSTONE GROUP INC.
345 PARK AVENUE
NEW YORK, NY 10154
    X    
BCP VII Holdings Manager (Cayman) L.L.C.
C/O THE BLACKSTONE GROUP INC.
345 PARK AVENUE
NEW YORK, NY 10154
    X    

Signatures

 YORK PARENT LIMITED, By: /s/ Martin J. Brand, Name: Martin J. Brand, Title: Director   02/02/2021
**Signature of Reporting Person Date

 BCP YORK HOLDINGS (DELAWARE) L.P., By: BCP York Holdings GP (Delaware) L.L.C., its general partner, By: /s/ Martin J. Brand, Name: Martin J. Brand, Title: President   02/02/2021
**Signature of Reporting Person Date

 BCP YORK HOLDINGS GP (DELAWARE) L.L.C., By: /s/ Martin J. Brand, Name: Martin J. Brand, Title: President   02/02/2021
**Signature of Reporting Person Date

 BCP YORK SUBSIDIARY (CAYMAN) L.P., By: BCP VII Holdings Manager (Cayman) LLC, its GP, By: Blackstone Holdings III LP, its indirect MM, By: Blackstone Holdings III GP LP, its GP, By: Blackstone Holdings III GP Management LLC, its GP, By: /s/ Tabea Hsi, SMD   02/02/2021
**Signature of Reporting Person Date

 BCP VII HOLDINGS MANAGER (CAYMAN) L.L.C., By: BCP VII GP L.L.C., its indirect MM, By: Blackstone Holdings III L.P., its SM, By: Blackstone Holdings III GP L.P., its GP, By: Blackstone Holdings III GP Management L.L.C., its GP, By: /s/ Tabea Y. Hsi, SMD   02/02/2021
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) On January 29, 2021, the Reporting Persons sold their interests in Refinitiv Parent Limited, which indirectly beneficially owns the securities of the Issuer reported herein, to the London Stock Exchange Group plc ("LSEG plc") in an all-stock transaction, for an aggregate of 204,225,968 voting and limited voting ordinary shares to be issued by LSEG plc in accordance with the terms of the stock purchase agreement governing the transaction (the "Sale"). No securities of the Issuer were transferred by Refinitiv TW Holdings Ltd. or Refinitiv US PME LLC in connection with the Sale, and such entities continue to own the securities reported herein.
(2) Shares of the Issuer's Class B common stock ("Class B Common Stock") have ten votes per share and are exchangeable for shares of the Issuer's Class A common stock ("Class A Common Stock") on a one-for-one basis at the discretion of the holder. These exchange rights do not expire.
(3) Shares of Class D common stock of the Issuer ("Class D Common Stock") have ten votes per share but no economic rights (including rights to dividends or, other than their par value, distributions upon liquidation) and are issued in an equal amount to the number of non-voting common units of Tradeweb Markets LLC, a subsidiary of the Issuer ("LLC Units"), held. Shares of Class D Common Stock are exchangeable for shares of the Issuer's Class C common stock ("Class C Common Stock"), which have one vote per share but no economic rights (other than their par value upon liquidation), on a one-for-one basis at the discretion of the holder. These exchange rights do not expire.
(4) Pursuant to the terms of the limited liability company agreement for Tradeweb Markets LLC, LLC Units may be exchanged for shares of Class A Common Stock or Class B Common Stock, in each case, on a one-for-one basis at the discretion of the holder. Upon such an exchange, a corresponding number of shares of Class D Common Stock (or shares of Class C Common Stock, in the event the holder exchanged its shares of Class D Common Stock as described above) will be canceled. These exchange rights do not expire.
(5) These securities are directly held by Refinitiv TW Holdings Ltd.
(6) These securities are directly held by Refinitiv US PME LLC.
(7) Refinitiv US LLC is the controlling member of Refinitiv US PME LLC. Refinitiv US Holdings Inc. is the sole member of Refinitiv US LLC. Refinitiv Parent Limited is the sole shareholder of Refinitiv US Holdings Inc. and Refinitiv TW Holdings ltd. Prior to the Sale, York Parent Limited (f/k/a Refinitiv Holdings Limited) was the sole shareholder of Refinitiv Parent Limited. BCP York Holdings (Delaware) L.P. is the majority shareholder of Refinitiv Holdings Limited. BCP York Holdings GP (Delaware) L.L.C. is the general partner of BCP York Holdings (Delaware) L.P. BCP York Subsidiary (Cayman) L.P. is the sole member of BCP York Holdings GP (Delaware) L.L.C. BCP VII Holdings Manager (Cayman) L.L.C. is the general partner of BCP York Subsidiary (Cayman) L.P.
(8) Blackstone Management Associates (Cayman) VII L.P. is the managing member of BCP VII Holdings Manager (Cayman) L.L.C. BCP VII GP L.L.C. is a general partner of Blackstone Management Associates (Cayman) VII L.P. Blackstone Holdings III L.P. is the sole member of BCP VII GP L.L.C. The general partner of Blackstone Holdings III L.P. is Blackstone Holdings III GP L.P. The general partner of Blackstone Holdings III GP L.P. is Blackstone Holdings III GP Management L.L.C. The sole member of Blackstone Holdings III GP Management L.L.C. is The Blackstone Group Inc. (f/k/a The Blackstone Group L.P.). The sole holder of the Class C common stock of The Blackstone Group Inc. is Blackstone Group Management L.L.C. Blackstone Group Management L.L.C. is wholly-owned by Blackstone's senior managing directors and controlled by its founder, Stephen A. Schwarzman.
(9) Due to the limitations of the electronic filing system certain Reporting Persons are filing a separate Form 3.
(10) Information with respect to each of the Reporting Persons is given solely by such Reporting Person, and no Reporting Person has responsibility for the accuracy or completeness of information supplied by another Reporting Person.
(11) Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, and, pursuant to Rule 16a-1(a)(4) under the Securities Exchange Act of 1934, each of the Reporting Persons states that the inclusion of these securities in this report shall not be deemed an admission of beneficial ownership of all of the reported securities for purposes of Section 16 or for any other purpose.

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