X0508 4 2026-03-02 0001018164 WILLIS LEASE FINANCE CORP WLFC 0001453104 Willis Austin Chandler 4700 LYONS TECHNOLOGY PARKWAY COCONUT CREEK FL 33073 true true true false Chief Executive Officer true Common Stock 2026-03-02 4 S false 961 194.4479 D 183785 D Common Stock 2026-03-02 4 S false 1052 195.0868 D 182733 D Common Stock 2026-03-02 4 S false 647 196.6329 D 182086 D Common Stock 2026-03-02 4 S false 400 197.5944 D 181686 D Common Stock 2026-03-02 4 S false 200 198.51 D 181486 D Common Stock 2026-03-02 4 S false 100 199.77 D 181386 D Common Stock 2026-03-02 4 S false 40 200.89 D 181346 D Common Stock 1822 I Son Common Stock 1822 I Daughter Common Stock 22322 I Brother Common Stock 3449 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 $194.01 to $194.76, 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 $195.01 to $195.72, 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. This transaction was executed in multiple trades at prices ranging from $196.05 to $197.01, 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 (4) of this Form 4. This transaction was executed in multiple trades at prices ranging from $197.0575 to $197.78, 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 (5) 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 2026-03-04