Mechanics Bancorp — Director's Dealing 2025

Dec 18, 2025

SEC Form 4/A — Form 4/A

Issuer: Mechanics Bancorp (MCHB)
CIK: 0001518715
Period of Report: 2025-09-02

Reporting Person: MASON MARK K (Consultant)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-09-02	Common Stock	A	14848	—	Acquired	213196	Direct
2025-09-02	Common Stock	F	5843	$13.87	Disposed	207353	Direct
2025-09-02	Common Stock	A	33333	—	Acquired	240686	Direct
2025-09-02	Common Stock	F	13117	$13.87	Disposed	227569	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	2800	Indirect

Footnotes

F1: Reflects shares of Issuer Class A common stock received upon vesting of performance stock units (PSUs"). Pursuant to the Agreement and Plan of Merger, dated as of March 28, 2025, among HomeStreet, Inc., HomeStreet Bank, a subsidiary of HomeStreet, Inc., and Mechanics Bank, at the effective time of the merger on September 2, 2025, each outstanding PSU held by the Reporting Person was accelerated and entitled the Reporting Person to receive shares of Issuer Class A common stock, plus a cash amount for any accrued by unpaid dividends on the PSUs. In the merger, HomeStreet, Inc. was renamed to Mechanics Bancorp.

F2: Shares of Issuer Class A common stock were issued to the Reporting Person without payment of any consideration in connection with the vesting of a PSU award granted to the Reporting Person on January 1, 2023. The number of shares issued on the vesting of the PSU was determined based on the achievement of certain performance factors set forth in the PSU. The unvested portion of the PSU was cancelled.

F3: This amendment is being filed to correct the number of shares withheld by the Issuer in payment of the withholding tax liability incurred upon the above-reported settlement of PSUs. It was previously reported that the Issuer withheld 6,430 shares of the Issuer Class A common stock upon vesting of a PSU award granted on January 1, 2023, when in fact the number of shares withheld was 5,843 shares.

F4: Shares of Issuer Class A common stock were issued to the Reporting Person without payment of any consideration in connection with the vesting of a PSU award granted to the Reporting Person on January 1, 2024. The number of shares issued on the vesting of the PSU was determined based on the achievement of certain performance factors set forth in the PSU. The unvested portion of the PSU was cancelled.

F5: This amendment is being filed to correct the number of shares withheld by the Issuer in payment of the withholding tax liability incurred upon the above-reported settlement of PSUs. It was previously reported that the Issuer withheld 14,434 shares of the Issuer Class A common stock upon vesting of a PSU award granted on January 1, 2024, when in fact the number of shares withheld was 13,117 shares.

F6: These shares are owned by the Reporting Person's spouse. Mr. Mason disclaims beneficial ownership of these shares except to the extent of any pecuniary interest he may have therein.