Christopher D. Pierce - 02 Sep 2025 Form 4 Insider Report for Mechanics Bancorp (HMST)

Role
EVP & Chief Operating Officer
Signature
/s/ Glenn Shrader, Attorney in fact for Christopher D. Pierce
Issuer symbol
HMST
Transactions as of
02 Sep 2025
Net transactions value
-$71,731
Form type
4
Filing time
05 Jan 2026, 19:45:56 UTC
Next filing
18 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Pierce Christopher D EVP & Chief Operating Officer 1111 CIVIC DRIVE, SUITE 390, WALNUT CREEK /s/ Glenn Shrader, Attorney in fact for Christopher D. Pierce 05 Jan 2026 0002103476

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction MCHB Class A Common Stock Award +11,262 11,262 02 Sep 2025 Direct F1, F2
transaction MCHB Class A Common Stock Award $0 +21,818 +194% $0.000000 33,080 26 Sep 2025 Direct
transaction MCHB Class A Common Stock Tax liability $71,731 -4,903 -15% $14.63 28,177 31 Dec 2025 Direct

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction MCHB Incentive Units - Not Deferred (2024) Award $0 +13,742 $0.000000 13,742 02 Sep 2025 Class A Common Stock 13,742 Direct F2, F3, F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Received in exchange for an aggregate of 3.41 shares of Mechanics Bank ("MB") original voting common stock and MB restricted stock units in connection with the merger of HomeStreet Bank, a wholly owned subsidiary of Issuer, with and into MB, pursuant to which MB continued as the surviving corporation and as a wholly owned subsidiary of Issuer (the "Merger").
F2 As consideration for the Merger, (i) each share of MB voting common stock converted into the right to receive 3,301.0920 shares of Issuer Class A Common Stock, which, on the effective date of the Merger, had a closing price of $13.87 per share, (ii) each MB restricted stock unit of the Reporting Person converted into restricted stock units of Issuer for the right to receive 3,301.0920 shares of Issuer Class A Common Stock, and (iii) each MB incentive unit of the Reporting Person converted into incentive units of Issuer of the economic equivalent of 3,301.0920 shares of Issuer Class A Common Stock.
F3 Each incentive unit is the economic equivalent of one share of Issuer Class A Common Stock.
F4 The incentive units vest in three equal annual installments beginning February 15, 2026.