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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
1659714	Murugesan Shanmugaraj	C/O Acacia Communications, Inc. Three Mill And Main Place, Suite 400 Maynard MA 01754	President & Ceo	Yes	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	2021-01-15	13,940	$0.00	599,747	No	4	A	Direct
Common Stock	Disposition	2021-01-19	6,274	$114.44	593,473	No	4	S	Direct

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

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	152,780	Indirect	By The Shanmugaraj Irrevocable Children's Trust
Common Stock	138,117	Indirect	By The Malini Shanmugaraj 2016 QTIP Trust

Footnotes

Consists of 13,940 shares of common stock received upon vesting of performance-based stock units ("PSUs") on January 15, 2021, which PSUs were granted to the reporting person on February 7, 2018 and were subject to performance conditions that have been satisfied.
Includes 46,131 restricted stock units ("RSUs"). Each RSU represents the right to receive one share of common stock upon vesting.
The sales reported were used to pay tax withholding in connection with the vesting of PSUs.