Mechanics Bancorp

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

For the quarterly period ended September 30, 2026

OR

For the transition period from to

Commission file number:001-35424

MECHANICS BANCORP

(Exact name of registrant as specified in its charter)

(925)482-8000

(Registrant’s Telephone Number, Including Area Code)

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

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.

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐No ☒

As of November 2, 2026, there were 220,360,304 shares of Class A common stock outstanding and 1,114,448 shares of Class B common stock outstanding.

Table of Contents

Introductory Note

Presentation of Results - HomeStreet Bank Merger

On September 2, 2025, we completed the Merger of HomeStreet Bank, the wholly-owned subsidiary of Mechanics Bancorp (formerly known as “HomeStreet, Inc.”) with and into Mechanics Bank, with Mechanics Bank as the surviving bank. Mechanics Bank is the accounting acquirer (“legal acquiree”), HomeStreet Bank is the accounting acquiree and Mechanics Bancorp is the legal acquirer. In this Quarterly Report on Form 10-Q, our financial results for all periods ended prior to September 2, 2025 reflect Mechanics Bank’s results on a standalone basis until the closing of the Merger on September 2, 2025 and results of the combined company beginning September 2, 2025. The number of shares issued and outstanding, earnings per share, and all references to share quantities or metrics of Mechanics Bancorp have been retrospectively restated to reflect the equivalent number of shares issued in the Merger since the Merger was accounted for as a reverse acquisition. As the accounting acquirer, Mechanics Bank remeasured the identifiable assets acquired and liabilities assumed in the Merger as of September 2, 2025 at their acquisition date fair values.

Unless we state otherwise or the context otherwise requires, references in this Quarterly Report on Form 10-Q to “Mechanics,” “we,” “our,” “us” or the “Company” refer collectively to Mechanics Bancorp, Mechanics Bank (the “Bank”) and other direct and indirect subsidiaries of Mechanics Bancorp, following completion of the Merger. In some instances, we refer to Mechanics Bank prior to the effective time of the Merger as “legacy Mechanics Bank,” HomeStreet Bank prior to the effective time of the Merger as “legacy HomeStreet Bank,” and HomeStreet, Inc. prior to the effective time of the Merger as “legacy HomeStreet, Inc.”