Company: MCHB
Filing Date: 2025-03-31
Form Type: 425
Source: 0001518715-25-000041
Chunk: 9

Company: Mechanics Bancorp
Filing Date: 2025-03-31
Form: 425
Chunk 9
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-forma assets at merger close, the combined company is expected to materially outperform most West Coast and high multiple trading national banks. • The Mechanics team brings additional talent to enhance our capabilities across this expanded footprint. • Mechanics Bank has a full-service wealth management and trust business which is a needed service for our private client group. • The combination will create increased lending and service capabilities across asset classes, geographies, and industry types. What will change for me as a HomeStreet Bank customer? The HomeStreet Bank name will be replaced with Mechanics Bank, however, you will continue to be serviced by the same familiar staff, branches, products and services you are accustomed to. No retail branches are planned to be closed. Our respective branch networks complement each other extraordinarily well. We do not expect any changes due to the merger. How will the merger affect me? When will I notice changes? You should not notice any changes throughout the proposed merger and eventual integration processes. We will continue to operate with the same familiar staff, branches, products, and services you are accustomed to. However, as with any changes we make, should there be something that affects you, we will let everyone know via our usual communication channels at the appropriate time. Where can I get more information about the merger announcement? Please visit our homepage of HomeStreet.com for a link to the press release and related investor deck.

Mechanics Bank – HomeStreet Bank, Inc./HomeStreet Bank Merger Information Page 3 of 3 INTERNAL USE ONLY | Not for Public Distribution | March 31, 2025 I am a Mechanics Bank customer. Who do I contact there? For General Banking Customer Care, please call 800.797.6324. I am a Mechanics Bank investor/shareholder and I have questions about this merger. Who can I talk to? Mechanics Corporate Communications Greg Jones 916.797.8218 gregory_jones@mechanicsbank.com 1Includes banks headquartered in California, Oregon, and Washington with less than $250bn total assets. 2West coast banks include BANC, BANR, BOH, CVBF, FHB, FIBK, GBCI, HFWA, HTBK, PPBI, TCBK and WAFD. Cautionary Note Regarding Forward Looking Statements When used in this client statement and FAQ internal communications document and in other documents filed with or furnished to the U.S. Securities and Exchange Commission (the “SEC”), in press releases or other public shareholder communications, or in oral