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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. Three Mill And Main Place, Suite 400 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
Common Stock	Acquisiton	2016-10-12	30,000	$0.41	145,564	No	4	M	Direct
Common Stock	Disposition	2016-10-12	11,721	$88.46	133,843	No	4	F	Direct
Common Stock	Disposition	2016-10-13	25,501	$96.50	108,342	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	M	Direct
No	4	F	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	2016-10-12	30,000	$0.00	30,000	$0.41

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
166,500		2022-03-14	No	4	M	Direct

Footnotes

Consists of 30,000 shares of common stock acquired upon the exercise of outstanding stock options. Mr. Gavin is holding the 30,000 shares with his spouse as joint tenants with the right of survivorship.
Consists of 46,000 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.
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 RSUs that were previously reported by the Reporting Person and does not represent a sale by the Reporting Person.
Consists of 61,670 shares of common stock and 72,173 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 the Reporting Person was a selling stockholder.
Consists of 36,169 shares of common stock and 72,173 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.