X0508 4 2023-10-27 0001464423 PennyMac Mortgage Investment Trust PMT 0001668396 Lynch Catherine A. C/O PENNYMAC MORTGATE INVESTMENT TRUST 3043 TOWNSGATE ROAD WESTLAKE VILLAGE CA 91361 1 0 Common Shares of Beneficial Interest 2023-10-27 4 P 0 533.1861 12.45 A 25088.9682 D Shares acquired under brokers' automatic dividend reinvestment plans. The purchase price reported is the weighted average price of multiple transactions ranging from $12.15 to 12.60. 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 8,058 restricted stock units and 17,030.9682 shares of Common Shares. The restricted stock units are to be settled in an equal number of shares of Common Shares upon vesting. /s/ Derek W. Stark, attorney-in-fact for Ms. Lynch 2023-10-31