X0508 4 2025-09-02 0001018164 WILLIS LEASE FINANCE CORP WLFC 0001453104 Willis Austin Chandler 4700 LYONS TECHNOLOGY PARKWAY COCONUT CREEK FL 33073 true true Chief Executive Officer true Common Stock 2025-09-02 4 S 0 2504 144.9809 D 190359 D Common Stock 2025-09-02 4 S 0 896 145.6123 D 189463 D Common Stock 2025-09-02 4 S 0 663 144.9809 D 4759 I Son Common Stock 2025-09-02 4 S 0 237 145.6123 D 4522 I Son Common Stock 2025-09-02 4 S 0 663 144.9809 D 4759 I Daughter Common Stock 2025-09-02 4 S 0 237 145.6123 D 4522 I Daughter Common Stock 2025-09-02 4 S 0 663 144.9809 D 25259 I Brother Common Stock 2025-09-02 4 S 0 237 145.6123 D 25022 I Brother Common Stock 2654 I Austin C. Willis 2019 Irrevocable Trust Common Stock 8692 I CFW V 2016 Trust Common Stock 232715 I 2019 Willis Family Trust Common Stock 405488 I CFW Partners The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 3, 2025. This transaction was executed in multiple trades at prices ranging from $144.335 to $145.33, inclusive. The price reported reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares sold at each separate price within the range set forth in footnote (2) of this Form 4. This transaction was executed in multiple trades at prices ranging from $145.37 to $146.035, inclusive. The price reported reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares sold at each separate price within the range set forth in footnote (3) of this Form 4. Rooster A. Willis 2019 Trust, Austin Willis Trustee. Wilder Grace Willis 2019 Trust, Austin Willis Trustee. Charles F. Willis V 2019 Trust, Austin Willis Trustee. Austin C. Willis 2019 Irrevocable Trust, Mary Willis Trustee. Charles F. Willis V 2016 Trust, Austin Willis Trustee. 2019 Willis Family Trust, Austin Willis Trustee. Includes 213,415 shares having shared voting power of CFW Partners with Charles F. Willis IV. Shared voting power of CFW Partners with Charles F. Willis IV. /s/ Austin C. Willis 2025-09-04