SecProbe.io

CORRESP
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J.P. Morgan Securities LLC

383 Madison Avenue

New York, New York 10179

Barclays Capital Inc.

745 Seventh Avenue

New York, New York 10019

Citigroup Global Markets Inc.

388 Greenwich Street

New York, New York 10013

Goldman Sachs & Co. LLC

200 West Street

New York, New York 10282

Morgan Stanley & Co. LLC

1585 Broadway

New York, New York 10036

United States Securities and Exchange Commission

Division of Corporation Finance

Mail Stop 4720

100 F. Street, N.E.

Washington, D.C. 20549

Attn: Susan Block

April 20, 2020

    Re:
    Tradeweb Markets, Inc.

    Registration Statement on Form S-1

Ladies and Gentlemen:

In accordance with Rule 461 under the
Securities Act of 1933, as amended (the “Act”), we, as representatives of the several underwriters, hereby join
in the request of Tradeweb Markets Inc. (the “Company”) for acceleration of the effective date of the above-named
Registration Statement so that it comes effective at 4:30 PM, Eastern Time, on April 22, 2020 or soon thereafter as
practicable, or at such other time as the Company or its outside counsel, Fried, Frank, Harris, Shriver & Jacobson LLP,
request by telephone that such Registration Statement be declared effective.

Pursuant to Rule 460 under the Act, we,
as representatives of the several underwriters, wish to advise you that we have effected the following distribution of the Company’s
Preliminary Prospectus dated April 20, 2020:

 i. Date of distribution: April 20, 2020 through the date hereof

 ii. Number of prospective underwriters to which the preliminary prospectus was furnished: 5

 iii. Number of prospectuses furnished to investors: approximately 1,000

 iv. Number of prospectuses distributed to others, including the Company, the Company’s counsel, independent accountants,
and underwriters’ counsel: 50

We, the undersigned, as representatives
of the several underwriters, have complied and will comply, and we have been informed by the participating underwriters that they
have complied and will comply, with the requirements of Rule 15c2-8 under the Securities Exchange Act of 1934, as amended

	Very truly yours,

J.P. MORGAN SECURITIES LLC

BARCLAYS CAPITAL INC.

CITIGROUP GLOBAL MARKETS INC.

GOLDMAN SACHS & CO. LLC

MORGAN STANLEY & CO. LLC

Acting on behalf of itself and the several underwriters

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    By:
    J.P. Morgan Securities LLC

    By:
    /s/ Michael Rhodes

    Name:
    Michael Rhodes

    Title:
    Vice President

[Signature Page to Acceleration Request
(Underwriters)]

    By:
    Barclays Capital Inc.

    By:
    /s/ Geoffrey Feldkamp

    Name:
    Geoffrey Feldkamp

    Title:
    Managing Director

[Signature Page to Acceleration Request
(Underwriters)]

    By:
    Citigroup Global Markets Inc.

    By:
    /s/ Adi Jayaraman

    Name:
    Adi Jayaraman

    Title:
    Managing Director

[Signature Page to Acceleration Request
(Underwriters)]

    By:
    Goldman Sachs & Co. LLC

    By:
    /s/ Erich Bluhm

    Name:
    Erich Bluhm

    Title:
    Managing Director

[Signature Page to Acceleration Request
(Underwriters)]

    By:
    Morgan Stanley & Co. LLC

    By:
    /s/ Kyle McDonnell

    Name:
    Kyle McDonnell

    Title:
    Executive Director

[Signature Page to Acceleration Request
(Underwriters)]