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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	2017-05-15	5,112	$48.53	113,966	No	4	S	Direct

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

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	193,428	Indirect	By Shah LLC
Common Stock	106,234	Indirect	By Bhupendra Shah 1999 Trust U/A DTD 10/06/1999

Footnotes

The sales reported were used to pay tax withholding in connection with the vesting of restricted stock units ("RSUs").
This transaction was executed in multiple trades at prices ranging from $48.454 to $48.552, 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.
Includes 83,502 RSUs. Each RSU represents the right to receive one share of common stock upon vesting. Includes 182 shares of common stock acquired under the registrant's employee stock purchase plan on April 30, 2017.