Ownership Submission
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 *
North Island Ventures, LLC
  2. Issuer Name and Ticker or Trading Symbol
Virtu Financial, Inc. [VIRT]
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)
51 WEST 52ND STREET, 30TH FLOOR, 
3. Date of Earliest Transaction (Month/Day/Year)
08/10/2017
(Street)

NEW YORK, NY 10019
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
Class A common stock, par value $0.00001 per share 08/10/2017   P   338,124 A $ 15.44 (1) 40,064,103 I See Footnotes (2) (3) (4) (5)

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

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
North Island Ventures, LLC
51 WEST 52ND STREET, 30TH FLOOR
NEW YORK, NY 10019
    X    
North Island Holdings I, LP
51 WEST 52ND STREET, 30TH FLOOR
C/O NORTH ISLAND VENTURES, LLC
NEW YORK, NY 10019
    X    
North Island Holdings I GP, LP
51 WEST 52ND STREET
30TH FLOOR
NEW YORK, NY 10019
    X    
North Island L.L.C.
C/O GLENN H. HUTCHINS, 51 W 52ND STREET
30TH FLOOR
NEW YORK, NY 10019
    X    
West Meadow Group LLC
C/O ROBERT GREIFELD, 51 W 52ND ST
30TH FLOOR
NEW YORK, NY 10019
    X    
HUTCHINS GLENN H
C/O SILVER LAKE
2775 SAND HILL ROAD, SUITE 100
MENLO PARK, CA 94025
  X   X    
GREIFELD ROBERT
C/O THE NASDAQ STOCK MARKET, INC
ONE LIBERTY PLAZA
NEW YORK, NY 10006
  X   X    

Signatures

 NORTH ISLAND HOLDINGS I, LP By: North Island Holdings I GP, LP, its general partner By: North Island Ventures, LLC, its general partner By: /s/ Glenn H. Hutchins Name: Glenn H. Hutchins Title: Chief Executive Officer   08/10/2017
**Signature of Reporting Person Date

 NORTH ISLAND HOLDINGS I GP, LP By: North Island Ventures, LLC, its general partner By: /s/ Glenn H. Hutchins Name: Glenn H. Hutchins Title: Chief Executive Officer   08/10/2017
**Signature of Reporting Person Date

 NORTH ISLAND VENTURES, LLC By: /s/ Glenn H. Hutchins Name: Glenn H. Hutchins Title: Chief Executive Officer   08/10/2017
**Signature of Reporting Person Date

 NORTH ISLAND L.L.C. By: /s/ Glenn H. Hutchins Name: Glenn H. Hutchins Title: Investment Manager   08/10/2017
**Signature of Reporting Person Date

 WEST MEADOW GROUP LLC By: /s/ Robert Greifeld Name: Robert Greifeld Title: Administrative Manager   08/10/2017
**Signature of Reporting Person Date

 GLENN H. HUTCHINS /s/ Glenn H. Hutchins   08/10/2017
**Signature of Reporting Person Date

 ROBERT GREIFELD /s/ Robert Greifeld   08/10/2017
**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 August 10, 2017, pursuant to a privately negotiated investment agreement with the Issuer and a letter agreement, dated July 19, 2017, with the Issuer, North Island Holdings I, LP purchased 338,124 shares of the Issuer's Class A common stock, par value $0.00001 per share for approximately $15.44 per share.
(2) These shares are owned directly by North Island Holdings I, LP.
(3) The sole general partner of North Island Holdings I, LP is North Island Holdings I GP, LP. The sole general partner of North Island Holdings I GP, LP is North Island Ventures, LLC. Messrs. Hutchins and Greifeld, directly and/or indirectly through North Island L.L.C. and West Meadow Group LLC, respectively, each control 50% of the membership interests in North Island Ventures, LLC. Each of North Island Holdings I GP, LP, North Island Ventures, LLC, North Island L.L.C., and West Meadow Group LLC and Messrs. Hutchins and Greifeld may be deemed to beneficially own the shares beneficially owned by North Island Holdings I, LP, but each (other than the North Island Holdings I, LP to the extent of its direct holdings) disclaims beneficial ownership of such shares, except to the extent of such Reporting Person's pecuniary interest therein.
(4) The filing of this statement shall not be deemed to be an admission that, for purposes of Section 16 of the Securities Exchange Act of 1934 or otherwise, the Reporting Persons are the beneficial owners of any securities reported herein.
(5) 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.

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