Generation Bio (GBIO) S-8Registration of securities for employees

As filed with the Securities and Exchange Commission on January 12, 2023

Registration No. 333-            

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

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FORM S-8

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

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Generation Bio Co.

(Exact Name of Registrant as Specified in Its Charter)

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2020 Stock Incentive Plan

2020 Employee Stock Purchase Plan

(Full Title of the Plan)

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Geoff McDonough, M.D.

President and Chief Executive Officer

301 Binney Street

Cambridge, MA 02142

(Name and Address of Agent for Service)

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(617) 655-6500

(Telephone Number, Including Area Code, of Agent for Service)

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Copies to:

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Jennifer Elliott, Ph.D., J.D.

Chief Legal Officer

301 Binney Street

Cambridge, MA 02142

(617) 655-6500

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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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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 the Securities Act. ☐

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PART I

Statement of Incorporation by Reference

This Registration Statement on Form S-8, relating to an aggregate of (a) 2,468,324 shares of common stock, $0.0001 par value per share (“Common Stock”), issuable under the 2020 Stock Incentive Plan of Generation Bio Co. (the “Registrant”), and (b) 595,054 shares of Common Stock issuable under the 2020 Employee Stock Purchase Plan of the Registrant, is being filed for the purpose of registering additional securities of the same class as other securities for which a Registration Statement on Form S-8 has previously been filed and is effective. Pursuant to General Instruction E to Form S-8, except as otherwise set forth below, this Registration Statement incorporates by reference the contents of:

The information required by Part II is omitted, except as supplemented by the information set forth below.

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PART II

INFORMATION REQUIRED IN THE REGISTRATION STATEMENT

Item 8. Exhibits.

The following exhibits are incorporated herein by reference:

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*Filed herewith

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-8 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in Cambridge, Massachusetts, on this 12th day of January 2023.

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POWER OF ATTORNEY AND SIGNATURES

We, the undersigned officers and directors of Generation Bio Co., hereby severally constitute and appoint Geoff McDonough, M.D., Matthew Norkunas, M.D., MBA, Jennifer Elliott, Ph.D., J.D., and Shawna-Gay White, J.D. and each of them singly (with full power to each of them to act alone), our true and lawful attorneys with full power of substitution and resubstitution in each of them for him or her and in his or her name, place and stead, and in any and all capacities, to sign for us and in our names in the capacities indicated below, the registration statement on Form S-8 filed herewith and any and all subsequent amendments to said registration statement, and generally to do all such things in our names and on our behalf in our capacities as officers and directors to enable Generation Bio Co. to comply with the provisions of the Securities Act of 1933, as amended, and all requirements of the Securities and Exchange Commission, hereby ratifying and confirming our signatures as they may be signed by our said attorneys, or any of them, to said registration statement and any and all amendments thereto.

Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons in the capacities and on the dates indicated.

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