X0508 4 2025-05-15 0001745916 PennyMac Financial Services, Inc. PFSI 0001591994 Perotti Daniel Stanley C/O PENNYMAC FINANCIAL SERVICES, INC. 3043 TOWNSGATE ROAD WESTLAKE VILLAGE CA 91361 1 Chief Financial Officer 1 Common Stock 2025-05-15 4 S 0 9534 99.4031 D 234991 I The Perotti Family Trust Common Stock 2025-05-15 4 S 0 966 99.9159 D 234025 I The Perotti Family Trust Common Stock 9964 D The sale reported on this Form 4 occurred automatically pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 27, 2024. The price reported is the weighted average price of multiple transactions at prices ranging from $98.857 to $99.836. The reporting person hereby undertakes to provide upon request to the SEC, the Issuer or a security holder of the Issuer the number of common shares of beneficial interest and the prices at which the transactions were effected. The price reported is the weighted average price of multiple transactions at prices ranging from $99.863 to $99.950. The reporting person hereby undertakes to provide upon request to the SEC, the Issuer or a security holder of the Issuer the number of common shares of beneficial interest and the prices at which the transactions were effected. The reported amount consists of 9,964 restricted stock units and 234,025 shares of Common Stock. The restricted stock units are to be settled in an equal number of shares of Common Stock upon vesting. /s/ Derek W. Stark, attorney-in-fact for Mr. Perotti 2025-05-19