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
	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* GA-GTCO Interholdco, LLC (Last) (First) (Middle) C/O GENERAL ATLANTIC SERVICE COMPANY,LLC 55 EAST 52ND STREET, 32ND FLOOR (Street) NEW YORK NY 10055 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol KCG Holdings, Inc. [ KCG ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) X Other (specify below) *See Remarks
	3. Date of Earliest Transaction (Month/Day/Year) 08/05/2016
	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 $0.01 per share	08/05/2016		S		1,500,000	D	$14.85	18,709,027	D(1)(2)(3)(4)(5)(6)

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* GA-GTCO Interholdco, LLC (Last) (First) (Middle) C/O GENERAL ATLANTIC SERVICE COMPANY,LLC 55 EAST 52ND STREET, 32ND FLOOR (Street) NEW YORK NY 10055 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) X Other (specify below) *See Remarks

1. Name and Address of Reporting Person* GENERAL ATLANTIC LLC (Last) (First) (Middle) C/O GENERAL ATLANTIC SERVICE COMPANY,LLC 55 EAST 52ND STREET, 32ND FLOOR (Street) NEW YORK NY 10055 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) X Other (specify below) *See Remarks

1. Name and Address of Reporting Person* GENERAL ATLANTIC GENPAR, L.P. (Last) (First) (Middle) C/O GENERAL ATLANTIC SERVICE COMPANY,LLC 55 EAST 52ND STREET, 32ND FLOOR (Street) NEW YORK NY 10055 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) X Other (specify below) *See Remarks

1. Name and Address of Reporting Person* GENERAL ATLANTIC PARTNERS 83, L.P. (Last) (First) (Middle) C/O GENERAL ATLANTIC SERVICE COMPANY,LLC 55 EAST 52ND STREET, 32ND FLOOR (Street) NEW YORK NY 10055 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) X Other (specify below) *See Remarks

1. Name and Address of Reporting Person* General Atlantic Partners 93, L.P. (Last) (First) (Middle) C/O GENERAL ATLANTIC SERVICE COMPANY,LLC 55 EAST 52ND STREET, 32ND FLOOR (Street) NEW YORK NY 10055 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) X Other (specify below) *See Remarks

1. Name and Address of Reporting Person* GA-GTCO US AIV, L.P. (Last) (First) (Middle) C/O GENERAL ATLANTIC SERVICE COMPANY,LLC 55 EAST 52ND STREET, 32ND FLOOR (Street) NEW YORK NY 10055 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) X Other (specify below) *See Remarks

1. Name and Address of Reporting Person* GA-GTCO AIV, L.P. (Last) (First) (Middle) C/O GENERAL ATLANTIC SERVICE COMPANY,LLC 55 EAST 52ND STREET, 32ND FLOOR (Street) NEW YORK NY 10055 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) X Other (specify below) *See Remarks

1. Name and Address of Reporting Person* GAP-W, LLC (Last) (First) (Middle) C/O GENERAL ATLANTIC SERVICE COMPANY,LLC 55 EAST 52ND STREET, 32ND FLOOR (Street) NEW YORK NY 10055 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) X Other (specify below) *See Remarks

1. Name and Address of Reporting Person* GAP COINVESTMENTS III, LLC (Last) (First) (Middle) C/O GENERAL ATLANTIC SERVICE COMPANY,LLC 55 EAST 52ND STREET, 32ND FLOOR (Street) NEW YORK NY 10055 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) X Other (specify below) *See Remarks

1. Name and Address of Reporting Person* GAP COINVESTMENTS IV, LLC (Last) (First) (Middle) C/O GENERAL ATLANTIC SERVICE COMPANY,LLC 55 EAST 52ND STREET, 32ND FLOOR (Street) NEW YORK NY 10055 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) X Other (specify below) *See Remarks

Explanation of Responses:

1. GA-GTCO Interholdco is the direct record holder of 18,709,027 shares of the issuer's Class A Common Stock, par value $0.01 per share (the "Class A Common Stock").

2. General Atlantic Partners 83, L.P., a Delaware limited partnership ("GAP 83"), is a member of GA-GTCO Interholdco and indirectly beneficially owns 5,469,459 shares of Class A Common Stock held by GA-GTCO Interholdco; General Atlantic Partners 93, L.P., a Delaware limited partnership ("GAP 93"), is a member of GA-GTCO Interholdco and indirectly beneficially owns 2,731,495 shares of Class A Common Stock held by GA-GTCO Interholdco; GA-GTCO US AIV, L.P., a Delaware limited partnership ("GA US AIV"), is a member of GA-GTCO Interholdco and indirectly beneficially owns 2,991,216 shares of Class A Common Stock held by GA-GTCO Interholdco; GA-GTCO AIV, L.P., a Delaware limited partnership ("GA AIV"), is a member of GA-GTCO Interholdco and indirectly beneficially owns 1,744,139 shares of Class A Common Stock held by GA-GTCO Interholdco; (cont'd in footnote 3)

3. (cont'd from footnote 2) GAP-W, LLC, a Delaware limited liability company ("GAP-W"), is a member of GA-GTCO Interholdco and indirectly beneficially owns 3,874,750 shares of Class A Common Stock held by GA-GTCO Interholdco; GAP Coinvestments III, LLC, a Delaware limited liability company ("GAPCO III"), is a member of GA-GTCO Interholdco and indirectly beneficially owns 1,338,525 shares of Common Stock held by GA-GTCO Interholdco; GAP Coinvestments IV, LLC, a Delaware limited liability company ("GAPCO IV"), is a member of GA-GTCO Interholdco and indirectly beneficially owns 318,997 shares of Class A Common Stock held by GA-GTCO Interholdco; GAP Coinvestments CDA, L.P., a Delaware limited partnership ("GAPCO CDA"), is a member of GA-GTCO Interholdco and indirectly beneficially owns 25,575 shares of Class A Common Stock held by GA-GTCO Interholdco; (cont'd in footnote 4)

4. (cont'd from footnote 3) and GapStar, LLC, a Delaware limited liability company ("GapStar" and, together with GAP 83, GAP 93, GA US AIV, GA AIV, GAP-W, GAPCO III, GAPCO IV and GAPCO CDA, the "GA Funds"), is a member of GA-GTCO Interholdco and indirectly beneficially owns 214,871 shares of Class A Common Stock held by GA-GTCO Interholdco.

5. The general partner of GAP 83, GAP 93, GAP US AIV and GAP AIV is General Atlantic GenPar, L.P. ("GenPar"). GenPar is also the manager of GAP-W. The general partner of GenPar is General Atlantic LLC ("GA LLC"). GA LLC is the managing member of GAPCO III and GAPCO IV and the general partner of GAPCO CDA. While GA LLC and GenPar may be deemed to beneficially own all of the Class A Common Stock and Warrants reported as beneficially owned by the reporting persons herein, each disclaims such beneficial ownership except to the extent of their respective pecuniary interest therein. Certain managing directors of GA LLC are the members of GapStar. (cont'd in footnote 6)

6. (cont'd from footnote 5) The managing directors of GA LLC may be deemed to share voting and dispositive power with respect to shares and interests held by the GA Funds, and voting and disposition decisions are made by a portfolio committee of GA LLC comprised of certain of the managing directors and officers of GA LLC. All individuals disclaim beneficial ownership of the securities owned by GA-GTCO Interholdco, except to the extent of their respective pecuniary interest therein.

Remarks:

Each of the reporting persons described in the notes above may be deemed to be a member of a "group" for purposes of the Securities Exchange Act of 1934. Each reporting person disclaims beneficial ownership of any securities deemed to be owned by the group that are not directly owned by the reporting person. This report shall not be deemed an admission that the reporting persons are a member of a group or the beneficial owner of any securities not directly owned by the reporting person.

	/s/ Thomas J. Murphy	08/09/2016
	/s/ Thomas J. Murphy	08/09/2016
	/s/ Thomas J. Murphy	08/09/2016
	/s/ Thomas J. Murphy	08/09/2016
	/s/ Thomas J. Murphy	08/09/2016
	/s/ Thomas J. Murphy	08/09/2016
	/s/ Thomas J. Murphy	08/09/2016
	/s/ Thomas J. Murphy	08/09/2016
	/s/ Thomas J. Murphy	08/09/2016
	/s/ Thomas J. Murphy	08/09/2016
	** Signature of Reporting Person	Date
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