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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1651235	Acacia Communications Inc.	ACIA	Semiconductors & Related Devices (3674)	270291921

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1657231	C Bhupendra Shah	C/O Acacia Communications, Inc. Three Mill And Main Place, Suite 400 Maynard MA 01754	Vice President Of Engineering	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2016-10-12	12,839	$88.46	98,551	No	4	F	Direct
Common Stock	Disposition	2016-10-13	47,917	$96.50	165,034	No	4	S	Indirect	By Bhupendra Shah 1999 Trust U/A DTD 10/06/1999

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	F	Direct
No	4	S	Indirect	By Bhupendra Shah 1999 Trust U/A DTD 10/06/1999

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	212,988	Indirect	By Shah LLC
Common Stock	1,928	Indirect	By son
Common Stock	1,928	Indirect	By son

Footnotes

Represents shares of common stock that have been withheld by the Company to satisfy its income tax withholding obligations in connection with the vesting of restricted stock units ("RSUs") that were previously reported by the Reporting Person and does not represent a sale by the Reporting Person. Each RSU represents the right to receive one share of common stock upon vesting.
Consists of 17,508 shares of common stock and 81,043 RSUs.
The sale transaction reported on this Form 4 was effected as part of an underwritten public offering of common stock of the Company in which Bhupendra Shah 1999 Trust U/A DTD 10/06/1999 was a selling stockholder.