Statement of Changes in Beneficial Ownership (4)

FORM 4 [ X ] 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	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response... 0.5
	Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person * Sambandan Sachi	2. Issuer Name and Ticker or Trading Symbol Gigamon Inc. [ GIMO ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director                      _____ 10% Owner __ X __ Officer (give title below)      _____ Other (specify below) Sr. VP Engineering
(Last)          (First)          (Middle) C/O GIGAMON INC., 3300 OLCOTT STREET	3. Date of Earliest Transaction (MM/DD/YYYY) 12/27/2017
(Street) SANTA CLARA, CA 95054 (City)        (State)        (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	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. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. 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	12/27/2017		U		72008   (1)	D	(2)	0	D

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. 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		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 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
Stock Option (right to buy)	$17.57	12/27/2017		D			91948	(3)	5/15/2024	Common Stock	91948	(3)	0	D
Stock Option (right to buy)	$21.44	12/27/2017		D			30000	(4)	2/17/2022	Common Stock	30000	(4)	0	D
Performance-Based Restricted Stock Units	$0.00	12/27/2017		D			18689	(5)	(5)	Common Stock	18689	(5)	0	D
Performance Shares	$0.00	12/27/2017		D			25000	(6)	(6)	Common Stock	25000	(6)	0	D

Explanation of Responses:
(1)	Certain of these securities were restricted stock units ("RSUs") that represented the Reporting Person's right to receive shares of Common Stock of the Issuer. The RSUs were cancelled pursuant to that certain Merger Agreement, dated October 26, 2017, between the Issuer, Ginsberg Holdco, Inc. and Ginsberg Merger Sub, Inc. (the "Merger Agreement"), in exchange for a cash payment of $38.50 per share.
(2)	Disposed of pursuant to the Merger Agreement, in exchange for a cash payment of $38.50 per share.
(3)	The option, which provided for vesting of 25% of the option on May 15, 2015 with the remaining shares vesting in thirty six equal monthly installments thereafter, was cancelled pursuant to the Merger Agreement, in exchange for a cash payment equal to the difference between $38.50 and the per share exercise price of the option.
(4)	The option, which provided for vesting of 25% of the option on February 17, 2016 with the remaining shares vesting in thirty six equal monthly installments thereafter, was cancelled pursuant to the Merger Agreement, in exchange for a cash payment equal to the difference between $38.50 and the per share exercise price of the option.
(5)	The performance-based RSUs, originally for 20,000 shares and reflected the target number and were to be based on the achievement of certain performance metrics for 2016 (and was later restated to reflect the achievement of approximately 150% of the performance criteria) for which the Reporting Person was eligible to receive up to 200% of the target number based on the achievement of the performance metrics and of which an aggregate of 11,211 shares have been exercised, was cancelled pursuant to the Merger Agreement, in exchange for a cash payment of $38.50 per share.
(6)	The performance shares, which reflected the target number and were to be based on the achievement of certain performance metrics for 2017 and for which the Reporting Person was eligible to receive up to 200% of the target number based on the achievement of the performance metrics, was cancelled pursuant to the Merger Agreement for no consideration.

Reporting Owners
Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
Sambandan Sachi C/O GIGAMON INC. 3300 OLCOTT STREET SANTA CLARA, CA 95054			Sr. VP Engineering

Signatures
/s/ Paul Shinn, Attorney-in-Fact		12/27/2017
** 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.
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