As filed with the Securities and Exchange Commission on February 10, 2012

Registration No. 333-                

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM S-1

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

HOMESTREET, INC.

(Exact Name of Registrant as Specified in its Charter)

601 Union Street, Suite 2000

Seattle, WA 98101

(206) 623-3050

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Mark K. Mason

Chief Executive Officer

HomeStreet, Inc.

601 Union Street, Suite 2000

Seattle, WA 98101

(206) 623-3050

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copy to:

As soon as practicable after the effective date of this Registration Statement.

(Approximate date of commencement of proposed sale to the public)

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 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.    x (File No. 333-173980)

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 post-effective amendment filed pursuant to Rule 462(d) 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.    ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

CALCULATION OF REGISTRATION FEE

THIS REGISTRATION STATEMENT SHALL BECOME EFFECTIVE UPON FILING WITH THE U.S. SECURITIES AND EXCHANGE COMMISSION IN ACCORDANCE WITH RULE 462(B) UNDER THE SECURITIES ACT.

EXPLANATORY NOTE

This Registration Statement on Form S-1 (this “462(b) Registration Statement”) is being filed pursuant to Rule 462(b) under the Securities Act of 1933, as amended, for the purpose of registering 219,783 shares of Common Stock of HomeStreet, Inc. This 462(b) Registration Statement relates to the initial public offering of shares of Common Stock contemplated by the Registration Statement on Form S-1 (File No. 333-173980), which was initially filed on May 6, 2011, and which, as amended, was declared effective by the Securities and Exchange Commission on February 10, 2012. Pursuant to Rule 462(b), the contents of the Registration Statement on Form S-1 (File No. 333-173980), including the exhibits thereto, are hereby incorporated by reference into this 462(b) Registration Statement.

PART II

INFORMATION NOT REQUIRED IN THE PROSPECTUS

ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the registrant has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Seattle, State of Washington, on February 10, 2012.

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 date indicated.

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EXHIBIT INDEX