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Filing Details

Accession Number:: 0001179110-19-002822
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2019-02-28 18:02:07
Reporting Period:: 2019-02-26

Accepted Time:: 2019-02-28 18:02:07
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1651235	Acacia Communications Inc.	ACIA	()	4

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1239366	Y Peter Chung	C/O Summit Partners 222 Berkeley Street, 18Th Floor Boston MA 02116		Yes	No	No	No

Reported Non-Derivative Transactions

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Disposition	2019-02-26	1,300,127	$52.25	10,590	No	4	S	Indirect	See Footnotes

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	S	Indirect	See Footnotes

Footnotes

Represents shares sold by the following entities: 987,039 shares sold by Summit Partners Venture Capital Fund III-A, L.P., 299,157 shares sold by Summit Partners Venture Capital Fund III-B, L.P., 12,860 shares sold by Summit Investors I, LLC and 1,071 shares sold by Summit Investors I (UK), L.P.
Consists of 4,446 shares and 6,144 restricted stock units held by Peter Y. Chung for the benefit of Summit Partners, L.P.
Summit Partners, L.P. is the managing member of Summit Partners VC III, LLC, which is the general partner of Summit Partners VC III, L.P., which is the general partner of each of Summit Partners Venture Capital Fund III-A, L.P. and Summit Partners Venture Capital Fund III-B, L.P. Summit Master Company, LLC is the managing member of Summit Investors Management, LLC, which is the manager of Summit Investors I, LLC, and the general partner of Summit Investors I (UK), L.P. Summit Master Company, LLC, as the managing member of Summit Investors Management, LLC, has delegated investment decisions, including voting and dispositive power, to Summit Partners, L.P. and its investment committee responsible for voting and investment decisions with respect to the Issuer.
Summit Partners, L.P., through a two-person investment committee responsible for voting and investment decisions with respect to the Issuer, currently comprised of Martin J. Mannion and Peter Y. Chung, has voting and dispositive power over the shares held by each of these entities and therefore may be deemed to beneficially own such shares. Mr. Chung is a member of Summit Master Company, LLC. Each of the entities listed in this report, Mr. Mannion and Mr. Chung expressly disclaims beneficial ownership of such shares except to the extent of their pecuniary interest therein.