SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
X	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* North Island Ventures, LLC (Last) (First) (Middle) 51 WEST 52ND STREET, 30TH FLOOR (Street) NEW YORK NY 10019 (City) (State) (Zip)	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)
	3. Date of Earliest Transaction (Month/Day/Year) 08/10/2017
	4. If Amendment, Date of 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

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)

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 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: 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

1. Name and Address of Reporting Person* North Island Ventures, LLC (Last) (First) (Middle) 51 WEST 52ND STREET, 30TH FLOOR (Street) NEW YORK NY 10019 (City) (State) (Zip)

1. Name and Address of Reporting Person* North Island Holdings I, LP (Last) (First) (Middle) 51 WEST 52ND STREET, 30TH FLOOR C/O NORTH ISLAND VENTURES, LLC (Street) NEW YORK NY 10019 (City) (State) (Zip)

1. Name and Address of Reporting Person* North Island Holdings I GP, LP (Last) (First) (Middle) 51 WEST 52ND STREET 30TH FLOOR (Street) NEW YORK NY 10019 (City) (State) (Zip)

1. Name and Address of Reporting Person* North Island L.L.C. (Last) (First) (Middle) C/O GLENN H. HUTCHINS, 51 W 52ND STREET 30TH FLOOR (Street) NEW YORK NY 10019 (City) (State) (Zip)

1. Name and Address of Reporting Person* West Meadow Group LLC (Last) (First) (Middle) C/O ROBERT GREIFELD, 51 W 52ND ST 30TH FLOOR (Street) NEW YORK NY 10019 (City) (State) (Zip)

1. Name and Address of Reporting Person* HUTCHINS GLENN H (Last) (First) (Middle) C/O SILVER LAKE 2775 SAND HILL ROAD, SUITE 100 (Street) MENLO PARK CA 94025 (City) (State) (Zip)

1. Name and Address of Reporting Person* GREIFELD ROBERT (Last) (First) (Middle) C/O THE NASDAQ STOCK MARKET, INC ONE LIBERTY PLAZA (Street) NEW YORK NY 10006 (City) (State) (Zip)

Explanation of Responses:

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.

	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
	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
	NORTH ISLAND VENTURES, LLC By: /s/ Glenn H. Hutchins Name: Glenn H. Hutchins Title: Chief Executive Officer	08/10/2017
	NORTH ISLAND L.L.C. By: /s/ Glenn H. Hutchins Name: Glenn H. Hutchins Title: Investment Manager	08/10/2017
	WEST MEADOW GROUP LLC By: /s/ Robert Greifeld Name: Robert Greifeld Title: Administrative Manager	08/10/2017
	GLENN H. HUTCHINS /s/ Glenn H. Hutchins	08/10/2017
	ROBERT GREIFELD /s/ Robert Greifeld	08/10/2017
	** 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 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).
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.