Company: MCHB
Filing Date: 2025-07-16
Form Type: 424B3
Source: 0001140361-25-026051
Chunk: 709

Company: Mechanics Bancorp
Filing Date: 2025-07-16
Form: 424B3
Chunk 709
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 |
|     |     | Name: Carl B. Webb     |
|     |     | Title: Managing Member |

F-10

TABLE OF CONTENTS

Schedule 1

| Holder                        |     | Shares of Voting 
   Company Common 
            Stock |     | Notice Information |
| EB Acquisition Company LLC    |     |           24,578 |     | ****               |
| EB Acquisition Company II LLC |     |           27,455 |     | ****               |

F-11

#### TABLE OF CONTENTS

#### Exhibit A
FINAL FORM

#### Form of

#### Action by Written Consent of Shareholders

#### of

### MECHANICS BANK

#### [Date]
<div align='center'>Pursuant to Section 603 of the Corporations Code of the State of California</div>

The undersigned (the “ Consenting Holders ”), being holders of issued and outstanding shares of the common stock, par value $50 per share (the “ Common Stock ”, which shares of Common Stock are set forth on Annex A ), of Mechanics Bank, a California corporation (the “ Corporation ”), in accordance with Section 603 of the California Corporations Code (the “ CCC ”), as amended, and Section 2.11 of the Bylaws of the Corporation, hereby irrevocably consent in writing to the following actions in lieu of a meeting of the shareholders of the Corporation (the “ Shareholder s”), with the same force and effect as if taken at a duly convened meeting of the Shareholders:

Shareholder Approval

WHEREAS , the Board of Directors of the Corporation (the “ Board”) has (a) approved and declared advisable that certain Agreement and Plan of Merger, dated as of March 28, 2025 (the “ Merger Agreement”), by and among the Corporation, HomeStreet, Inc., a Washington corporation (“ Parent”), and HomeStreet Bank, a Washington state-chartered commercial bank and a direct and wholly owned subsidiary of Parent (“ Parent Bank”), a copy of which has been provided to the undersigned Consenting Holders and is attached hereto as Annex B(capitalized terms used but not defined herein shall have the meanings set forth in the Merger Agreement), and the transactions contemplated thereby, including the Merger (collectively, the “ Transactions”), on the terms and subject to the conditions set forth in the Merger Agreement, (b) determined that the Merger Agreement and the consummation of the Transactions are advisable and in the best interests of the