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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
1657391	F John Gavin	C/O Acacia Communications, Inc. 3 Clock Tower Place, Suite 100 Maynard MA 01754	Chief Financial Officer	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	Acquisiton	2016-05-18	7,500	$0.41	107,064	No	4	M	Direct
Common Stock	Disposition	2016-05-18	7,500	$21.39	99,564	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	M	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Stock option (right to buy)	Disposition	2016-05-18	7,500	$0.00	7,500	$0.41

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
212,500		2022-03-14	No	4	M	Direct

Footnotes

Consists of 7,500 shares of common stock owned by Mr. Gavin and his spouse as joint tenants with the right of survivorship.
Consists of 7,500 shares of common stock and 99,564 restricted stock units ("RSUs"). Each RSU represents the right to receive one share of common stock upon vesting.
Consists of 99,564 RSUs.
This option, representing a right to purchase a total of 220,000 shares, vested as to 20% of the shares on February 27, 2013, and vests in equal monthly installments thereafter until February 27, 2017.