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* Highland Management Partners VII, LLC (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS, ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Gigamon Inc. [ GIMO ]	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) 02/18/2015
	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
Common Stock	02/18/2015		J(1)		922,198	D	$0	2,627,960	I	See footnote(1)
Common Stock	02/18/2015		J(2)		223,467	D	$0	636,805	I	See footnote(2)
Common Stock	02/18/2015		J(3)		325,438	D	$0	927,390	I	See footnote(3)
Common Stock	02/18/2015		J(4)		28,897	D	$0	82,345	I	See footnote(4)

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* Highland Management Partners VII, LLC (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS, ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Highland Capital Partners VII LP (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS, ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* HIGHLAND CAPITAL PARTNERS VII-B L P (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS, ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Highland Capital Partners VII-C LP (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS, ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Highland Entrepreneurs Fund VII Limited Partnership (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS, ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

1. Name and Address of Reporting Person* Highland Management Partners VII Limited Partnership (Last) (First) (Middle) C/O HIGHLAND CAPITAL PARTNERS, ONE BROADWAY, 16TH FLOOR (Street) CAMBRIDGE MA 02142 (City) (State) (Zip) Relationship of Reporting Person(s) to Issuer Director X 10% Owner Officer (give title below) Other (specify below)

Explanation of Responses:

1. Effective February 18, 2015, Highland Capital Partners VII Limited Partnership ("HCP VII"), a venture capital partnership, distributed in-kind, without consideration, a total of 922,198 shares of Common Stock of the Issuer to its limited partners, including Highland Management Partners VII, LP ("HMP VII LP"), the general partner of HCP VII, and to the limited partners of HMP VII. The remaining securities are held by HCP VII. Highland Management Partners VII, LLC ("HMP VII LLC") is the general partner of HMP VII LP. Each of HMP VII LP and HMP VII LLC disclaims beneficial ownership of all shares held by HCP VII except to the extent, if any, of such entity's pecuniary interest therein.

2. Effective February 18, 2015, Highland Capital Partners VII-B Limited Partnership ("HCP VII-B"), a venture capital partnership, distributed in-kind, without consideration, a total of 223,467 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HCP VII-B, and to the limited partners of HMP VII. The remaining securities are held by HCP VII-B. Each of HMP VII LP and HMP VII LLC disclaims beneficial ownership of all shares held by HCP VII-B except to the extent, if any, of such entity's pecuniary interest therein.

3. Effective February 18, 2015, Highland Capital Partners VII-C Limited Partnership ("HCP VII-C"), a venture capital partnership, distributed in-kind, without consideration, a total of 325,438 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HCP VII-C, and to the limited partners of HMP VII. The remaining securities are held by HCP VII-C. Each of HMP VII LP and HMP VII LLC disclaims beneficial ownership of all shares held by HCP VII-C except to the extent, if any, of such entity's pecuniary interest therein.

4. Effective February 18, 2015, Highland Entrepreneurs' Fund VII Limited Partnership ("HEF VII"), a venture capital partnership, distributed in-kind, without consideration, a total of 28,897 shares of Common Stock of the Issuer to its limited partners, including HMP VII LP, the general partner of HEF VII, and to the limited partners of HMP VII. The remaining securities are held by HEF VII. Each of HMP VII LP and HMP VII LLC disclaims beneficial ownership of all shares held by HEF VII except to the extent, if any, of such entity's pecuniary interest therein.

	/s/ Corey Mulloy, Authorized Manager of Highland Management Partners VII, LLC	02/20/2015
	/s/ Corey Mulloy, Authorized Manager of Highland Management Partners VII, LLC, the general partner of Highland Management Partners VII Limited Partnership	02/20/2015
	/s/ Corey Mulloy, Authorized Manager of Highland Management Partners VII, LLC, the general partner of Highland Management Partners VII Limited Partnership, the general partner of Highland Capital Partners VII Limited Partnership	02/20/2015
	/s/ Corey Mulloy, Authorized Manager of Highland Management Partners VII, LLC, the general partner of Highland Management Partners VII Limited Partnership, the general partner of Highland Capital Partners VII-B Limited Partnership	02/20/2015
	/s/ Corey Mulloy, Authorized Manager of Highland Management Partners VII, LLC, the general partner of Highland Management Partners VII Limited Partnership, the general partner of Highland Capital Partners VII-C Limited Partnership	02/20/2015
	/s/ Corey Mulloy, Authorized Manager of Highland Management Partners VII, LLC, the general partner of Highland Management Partners VII Limited Partnership, the general partner of Highland Entrepreneurs' Fund VII Limited Partnership	02/20/2015
	** Signature of Reporting Person	Date
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