As filed with the Securities and Exchange Commission on March 1, 2021
Registration No. 333-229770
Registration No. 333-223153
Registration No. 333-216200
Registration No. 333-211335
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 333-229770
Post-Effective Amendment No. 1 to Form
S-8 Registration Statement No. 333-223153
Post-Effective Amendment No. 1 to Form S-8 Registration Statement
No. 333-216200
Post-Effective Amendment No. 1 to Form S-8 Registration Statement No. 333-211335
REGISTRATION STATEMENT
UNDER
THE
SECURITIES ACT OF 1933
ACACIA COMMUNICATIONS, INC.
(Exact name of Registrant as specified in its charter)
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Delaware
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27-0291921
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(State or other jurisdiction of
incorporation or organization)
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(I.R.S. Employer
Identification No.)
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Three Mill and Main Place, Suite 400
Maynard, Massachusetts
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01754
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(Address of Principal Executive Offices)
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(Zip Code)
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2009 Stock Plan
2016 Equity Incentive Plan
Amended and Restated 2016 Employee Stock Purchase Plan
(Full title of the plans)
Murugesan Shanmugaraj
President and Chief Executive Officer
Acacia Communications, Inc.
Three Mill and Main Place, Suite 400
Maynard, Massachusetts 01754
(Name and address of agent for service)
(978) 938-4896
(Telephone number, including area code, of agent for service)
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a
non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of large accelerated filer, accelerated filer, smaller reporting
company and emerging growth company in Rule 12b-2 of the Exchange Act.
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Large accelerated filer
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☒
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Accelerated filer
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☐
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Non-accelerated filer
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☐
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Smaller Reporting Company
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☐
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Emerging Growth Company
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☐
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If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended
transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of Securities Act. ☐