SEC Form 3 
FORM 3	UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940 	  
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1. Name and Address of Reporting Person*
Ganeles Scott	

(Last)	(First)	(Middle)	
C/O TRADEWEB MARKETS INC.	
1177 AVENUE OF THE AMERICAS	

(Street) 
NEW YORK	NY	10036	

(City)	(State)	(Zip)	
	2. Date of Event Requiring Statement (Month/Day/Year)
04/04/2019 	3. Issuer Name and Ticker or Trading Symbol 
Tradeweb Markets Inc. [ TW ] 		
		4. Relationship of Reporting Person(s) to Issuer 
(Check all applicable) 
X	Director		10% Owner	
	Officer (give title below)		Other (specify below)	
	
	5. If Amendment, Date of Original Filed (Month/Day/Year)				
			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 Beneficially Owned	
1. Title of Security (Instr. 4) 	2. Amount of Securities Beneficially Owned (Instr. 4) 	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 	4. Nature of Indirect Beneficial Ownership (Instr. 5) 	
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities) 	
1. Title of Derivative Security (Instr. 4) 	2. Date Exercisable and Expiration Date (Month/Day/Year)	3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 	4. Conversion or Exercise Price of Derivative Security 	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 	6. Nature of Indirect Beneficial Ownership (Instr. 5) 	
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares				
Explanation of Responses:	
Remarks:	
Exhibit List: Exhibit 24 - Power of Attorney	
No securities are beneficially owned.	
	/s/ Scott Ganeles	04/04/2019	
	** Signature of Reporting Person	Date	
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.	
* If the form is filed by more than one reporting person, see Instruction 5 (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).	
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.	
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.	
                               POWER OF ATTORNEY

       Know all by these presents, that the undersigned hereby constitutes and
appoints Douglas Friedman, Scott Zucker and Scott Wells, and each of them, with
full power of substitution, the undersigned's true and lawful attorneys-in-fact
to:

      (1)  execute for and on behalf of the undersigned, in the undersigned's
           capacity as executive officer, director and/or beneficial owner of
           equity securities of Tradeweb Markets Inc. (the "Company"), (i) any
           forms required to be filed by the undersigned pursuant to Rule 144
           under the Securities Act of 1933, as amended (the "Securities Act"),
           (ii) Forms 3, 4, and 5 in accordance with Section 16(a) of the
           Securities Exchange Act of 1934, as amended (the "Exchange Act"),
           (iii) Schedules 13D and 13G in accordance with Section 13 of the
           Exchange Act, and (iv) and any other forms or reports the undersigned
           may be required to file in connection with the undersigned's
           ownership, acquisition, or disposition of securities of the Company;

      (2)  do and perform any and all acts for and on behalf of the undersigned
           which may be necessary or desirable to complete and execute any such
           (i) form required to be filed by the undersigned pursuant to Rule 144
           under the Securities Act, (ii) Form 3, 4, or 5 under Section 16(a) of
           the Exchange Act, (iii) Schedule 13D or 13G under Section 13 of the
           Exchange Act, or (iv) other form or report, including, without
           limitation, all forms or reports necessary to obtain EDGAR
           Identification Numbers, and timely file such form or report with the
           United States Securities and Exchange Commission and any stock
           exchange or similar authority; and

      (3)  take any other action of any type whatsoever in connection with the
           foregoing which, in the opinion of any such attorney-in-fact, may be
           of benefit to, in the best interests of, or legally required by, the
           undersigned, it being understood that the documents executed by such
           attorney-in-fact on behalf of the undersigned pursuant to this Power
           of Attorney shall be in such form and shall contain such terms and
           conditions as such attorney-in-fact may approve in such attorney-in-
           fact's discretion.

       The undersigned hereby grants to each such attorney-in-fact full power
and authority to do and perform any and every act and thing whatsoever
requisite, necessary, or proper to be done in the exercise of any of the rights
and powers herein granted, as fully to all intents and purposes as the
undersigned might or could do if personally present, with full power of
substitution or revocation, hereby ratifying and confirming all that such
attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall
lawfully do or cause to be done by virtue of this Power of Attorney and the
rights and powers herein granted. The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming any of the undersigned's responsibilities to
comply with Rule 144 under the Securities Act or Sections 13 or 16 of the
Exchange Act.

       This Power of Attorney shall remain in full force and effect until the
undersigned is no longer required to file any form required to be filed by the
undersigned pursuant to Rule 144 under the Securities Act, any Form 3, 4, or 5
under Section 16(a) of the Exchange Act, or any Schedule 13D or 13G under
Section 13 of the Exchange Act with respect to the undersigned's holdings of and
transactions in securities issued by the Company, unless earlier revoked by the
undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

       IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 28th day of March, 2019.

                                             /s/ Scott Ganeles
                                             -----------------
                                             Scott Ganeles