Shah Bhupendra C Form 4 Acacia Communications / Bhupendra C Shah ownership change

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^*

Shah Bhupendra C

(Last) (First) (Middle)

C/O ACACIA COMMUNICATIONS, INC.

THREE MILL AND MAIN PLACE, SUITE 400

(Street)

MAYNARD MA 01754

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Acacia Communications, Inc. [ ACIA ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	10% Owner
X	Officer (give title below)	Other (specify below)
Vice President of Engineering

3. Date of Earliest Transaction (Month/Day/Year)
03/06/2018

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								133,193(1)	D
Common Stock(2)	03/06/2018		S		4,100	D	$38.3563(3)	162,944	I	By Shah LLC
Common Stock(2)	03/06/2018		S		5,695	D	$39.3929(4)	157,249	I	By Shah LLC
Common Stock(5)	03/06/2018		S		4,000	D	$38.3669(6)	75,851	I	By Bhupendra Shah 1999 Trust U/A DTD 10/06/1999
Common Stock(5)	03/06/2018		S		5,795	D	$39.4159(7)	70,056	I	By Bhupendra Shah 1999 Trust U/A DTD 10/06/1999

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. Includes 98,293 restricted stock units ("RSUs"). Each RSU represents the right to receive one share of common stock upon vesting.

2. This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by Shah LLC on August 8, 2017.

3. This transaction was executed in multiple trades at prices ranging from $37.98 to $38.84, inclusive; the price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide full information regarding the number of shares and prices at which the transactions were effected upon request to the SEC staff, the registrant, or a security holder of the registrant.

4. This transaction was executed in multiple trades at prices ranging from $39.02 to $39.69, inclusive; the price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide full information regarding the number of shares and prices at which the transactions were effected upon request to the SEC staff, the registrant, or a security holder of the registrant.

5. This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the Bhupendra Shah 1999 Trust U/A DTD 10/06/1999 on August 8, 2017.

6. This transaction was executed in multiple trades at prices ranging from $37.92 to $38.85, inclusive; the price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide full information regarding the number of shares and prices at which the transactions were effected upon request to the SEC staff, the registrant, or a security holder of the registrant.

7. This transaction was executed in multiple trades at prices ranging from $38.95 to $39.68, inclusive; the price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide full information regarding the number of shares and prices at which the transactions were effected upon request to the SEC staff, the registrant, or a security holder of the registrant.

Remarks:

	/s/ Janene I. Asgeirsson, attorney-in-fact	03/08/2018
	** 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.