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* Mulloy Corey (Last) (First) (Middle) C/O GIGAMON INC. 598 GIBRALTAR DRIVE (Street) MILPITAS CA 95035 (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) X Director 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 10/28/2013
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person 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	10/28/2013		S		1,131,444	D	$36.77	3,550,158	I	See Footnote(1)
Common Stock	10/28/2013		S		274,171	D	$36.77	860,272	I	See Footnote(2)
Common Stock	10/28/2013		S		399,279	D	$36.77	1,252,828	I	See Footnote(3)
Common Stock	10/28/2013		S		35,453	D	$36.77	111,242	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

Explanation of Responses:

1. The securities are held by Highland Capital Partners VII Limited Partnership, a Delaware limited partnership ("HCP VII"). Highland Management Partners VII, LLC, a Delaware limited liability company ("HMP VII LLC") is the general partner of Highland Management Partnership VII Limited Partnership ("HMP VII LP"), which is the general partner of HCP VII. The Reporting Person is a Member of HMP VII LLC. Each of the Reporting Person, HMP VII LP and HMP VII LLC disclaims beneficial ownership of all shares held by HCP VII except to the extent, if any, of his or its pecuniary interest therein.

2. The securities are held by Highland Capital Partners VII-B Limited Partnership, a Delaware limited partnership ("HCP VII-B"). HMP VII LLC is the general partner of HMP VII LP. HMP VII LP is the general partner of HCP VII-B. Each of the Reporting Person, 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 his or its pecuniary interest therein.

3. The securities are held by Highland Capital Partners VII-C Limited Partnership, a Delaware limited partnership ("HCP VII-C"). HMP VII LLC is the general partner of HMP VII LP. HMP VII LP is the general partner of HCP VII-C. Each of the Reporting Person, 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 his or its pecuniary interest therein.

4. The securities are held by Highland Entrepreneurs' Fund VII Limited Partnership, a Delaware limited partnership ("HEF VII"). HMP VII LLC is the general partner of HMP VII LP. HMP VII LP is the general partner of HEF VII. Each of the Reporting Person, HMP VII LP and HMP VII LLC disclaims beneficial ownership of all shares held by HEF VII except to the extent, if any, of his or its pecuniary interest therein.

Remarks:

All share numbers and per share prices disclosed in this Form 4 give effect to the Issuer's one-for-three reverse stock split completed on May 20, 2013.

	By: /s/ Paul Shinn, Attorney-in-Fact	10/28/2013
	** 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).
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