X0609 4 2026-07-01 0001018164 WILLIS LEASE FINANCE CORP WLFC 0001453104 Willis Austin Chandler false 4700 LYONS TECHNOLOGY PARKWAY COCONUT CREEK FL 33073 true true true false Chief Executive Officer true Common Stock 2026-07-01 4 S false 500 220.6180 D 154980 D Common Stock 2026-07-01 4 S false 1700 221.8071 D 153280 D Common Stock 2026-07-01 4 S false 700 222.7057 D 152580 D Common Stock 2026-07-01 4 S false 500 223.9120 D 152080 D Common Stock 2026-07-01 4 S false 200 225.09 D 151880 D Common Stock 2026-07-01 4 S false 248 227.2126 D 151632 D Common Stock 2026-07-01 4 S false 1100 227.9898 D 150532 D Common Stock 2026-07-01 4 S false 236 229.53 D 150296 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 March 24, 2026. This transaction was executed in multiple trades at prices ranging from $220.30 to $220.73, 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 $221.34 to $222.22, 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 $222.40 to $223.28, 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 $223.41 to $224.21, 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. This transaction was executed in multiple trades at prices ranging from $226.64 to $227.35, 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 (6) of this Form 4. This transaction was executed in multiple trades at prices ranging from $227.64 to $228.42, 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 (7) 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 2026-07-06