As filed with the Securities and Exchange Commission on June 3, 2022
Registration No. 333-203981
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
_______________________________________
POST-EFFECTIVE AMENDMENT NO. 1 TO:
FORM S-3 REGISTRATION STATEMENT NO. 333-203981
UNDER
THE SECURITIES ACT OF 1933
_______________________________________
GENOCEA BIOSCIENCES, INC.
(Exact name of registrant as specified in its charter)
_______________________________________
Delaware 51-0596811
(State or other jurisdiction of incorporation or organization) (I.RS. Employer Identification No.)
100 Acorn Park Drive, Cambridge, MA 02140
(617) 876-8191
(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)
_______________________________________
Genocea Biosciences, Inc.
100 Acorn Park Drive, 5th Floor
Cambridge, MA 02140
(617) 876-8191
(Name, address, and telephone number of agent for service)
_______________________________________
Please send copies of all communications to:
Marc A. Rubenstein
Ropes & Gray LLP
Prudential Tower
800 Boylston Street
Boston, MA 02199-3600
(617) 951-7000
_______________________________________
Approximate date of commencement of proposed sale to the public: Not applicable. Removal from registration of shares that were not sold pursuant to the above referenced registration statement.
If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box.    ☐
If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, check the following box.    ☐
If this Form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act, please check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.    ☐
If this Form is a post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering.    ☐
If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box.    ☐


If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box.    ☐
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.
Large accelerated filer ☐ Accelerated filer ☐
Non-accelerated filer ☒ Smaller reporting company ☒
Emerging growth company ☐
If an emerging growth company, indicate by a 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.    ☐


DEREGISTRATION OF SHARES
This Post-Effective Amendment (this “Amendment”) relates to the following Registration Statement on Form S-3 (the “Registration Statement”) filed by Genocea Biosciences, Inc., a Delaware corporation (the “Company”) with the Securities and Exchange Commission (the “SEC”):
The purpose of this Amendment is to deregister all remaining securities available for issuance under the Registration Statement. In accordance with the undertakings made by the Company in the Registration Statement to remove from registration by means of a post-effective amendment any securities that had been registered for issuance but remain unsold at the termination of the offering, the Company hereby removes and withdraws from registration any and all securities registered pursuant to the Registration Statement that remain unsold as of the date hereof.


SIGNATURES
Pursuant to the requirements of the Securities Act of 1933, as amended, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this Amendment to the Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in Cambridge, Massachusetts, on the 3rd day of June 2022. No other person is required to sign this Amendment to the Registration Statement in reliance on Rule 478 of the Securities Act of 1933, as amended.
    GENOCEA BIOSCIENCES, INC.
       
       
    By: /s/ Diantha Duvall
      Diantha Duvall
      Chief Financial Officer

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