Company: MCHB
Filing Date: 2025-07-03
Form Type: S-4
Source: 0001140361-25-024872
Chunk: 0

Company: Mechanics Bancorp
Filing Date: 2025-07-03
Form: S-4
Chunk 0
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TABLE OF CONTENTS As filed with the U.S. Securities and Exchange Commission on July 3, 2025 File No. 333-

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-4 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 HOMESTREET, INC. (Exact Name of Registrant as Specified in its Charter)

| Washington                        
 (State or Other Jurisdiction      
 of Incorporation or Organization) |     | 6022                         
 (Primary Standard Industrial 
 Classification Code Number)  |     | 91-0186600             
 (IRS Employer          
 Identification Number) |

601 Union, Ste. 2000 Seattle, WA 98101 (206) 623-3050 (Address, Including Zip Code, and Telephone Number, Including Area Code, of Registrant’s Principal Executive Offices) Godfrey B. Evans Executive Vice President, General Counsel HomeStreet, Inc. 601 Union, Ste. 2000 Seattle, WA 98101 (206) 623-3050 (Name, Address, Including Zip Code, and Telephone Number, Including Area Code, of Agent for Service) Copies to :

| H. Rodgin Cohen          
 Mitchell S. Eitel        
 Sullivan & Cromwell LLP  
 125 Broad Street         
 New York, New York 10004 
 (212) 558-4000           |     | Glenn Shrader                             
 Executive Vice President, General Counsel 
 Mechanics Bank                            
 1111 Civic Drive, Suite 390               
 Walnut Creek, CA 94596                    |     | Jacob A. Kling                 
 Eric M. Feinstein              
 Wachtell, Lipton, Rosen & Katz 
 51 West 52nd Street            
 New York, New York 10019       
 (212) 403-1000                 |

Approximate date of commencement of proposed sale of the securities to the public: As soon as practicable after this Registration Statement is declared effective and upon completion of the merger described herein. If the securities being registered on this form are being offered in connection with the formation of a holding company and there is compliance with General Instruction G, 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, 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)