WILLIS CHARLES F IV

SEC source: 0000905148-26-004063 · form4.xml · nonDerivative · entry 1

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · Spouse

Disclosed balance after: 40,280

F1 · price: This transaction was executed in multiple trades at prices ranging from $52.95 to $52.96, 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 (1) of this Form 4.

F2 · ownership.nature: Charlotte Montressor Willis.

SEC source: 0000905148-26-003969 · form4.xml · nonDerivative · entry 3

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,492,143

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026, which was terminated on August 26, 2026.

F3 · price: This transaction was executed in multiple trades at prices ranging from $54.62 to $55.58, 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.

SEC source: 0000905148-26-003969 · form4.xml · nonDerivative · entry 2

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,507,743

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026, which was terminated on August 26, 2026.

SEC source: 0000905148-26-003969 · form4.xml · nonDerivative · entry 1

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,507,856

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026, which was terminated on August 26, 2026.

F2 · price: This transaction was executed in multiple trades at prices ranging from $53.91 to $54.90, 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.

SEC source: 0000905148-26-003886 · form4.xml · nonDerivative · entry 6

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,519,143

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026.

F6 · price: This transaction was executed in multiple trades at prices ranging from $55.03 to $55.53, 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.

SEC source: 0000905148-26-003886 · form4.xml · nonDerivative · entry 5

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,532,827

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026.

F5 · price: This transaction was executed in multiple trades at prices ranging from $53.98 to $54.95, 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.

SEC source: 0000905148-26-003886 · form4.xml · nonDerivative · entry 4

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,535,843

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026.

F4 · price: This transaction was executed in multiple trades at prices ranging from $54.73 to $54.87, 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.

SEC source: 0000905148-26-003886 · form4.xml · nonDerivative · entry 3

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,536,943

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026.

F3 · price: This transaction was executed in multiple trades at prices ranging from $53.72 to $54.71, 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.

SEC source: 0000905148-26-003886 · form4.xml · nonDerivative · entry 2

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,549,343

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026.

SEC source: 0000905148-26-003886 · form4.xml · nonDerivative · entry 1

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,549,459

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026.

F2 · price: This transaction was executed in multiple trades at prices ranging from $53.40 to $54.32, 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.

SEC source: 0000905148-26-003820 · form4.xml · nonDerivative · entry 9

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,565,643

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026.

F11 · price: This transaction was executed in multiple trades at prices ranging from $57.03 to $57.95, 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 (11) of this Form 4.

SEC source: 0000905148-26-003820 · form4.xml · nonDerivative · entry 8

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,570,453

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026.

F10 · price: This transaction was executed in multiple trades at prices ranging from $56.00 to $56.99, 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 (10) of this Form 4.

SEC source: 0000905148-26-003820 · form4.xml · nonDerivative · entry 7

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,573,586

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026.

F9 · price: This transaction was executed in multiple trades at prices ranging from $54.87 to $55.37, 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 (9) of this Form 4.

SEC source: 0000905148-26-003820 · form4.xml · nonDerivative · entry 6

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,584,943

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026.

F8 · price: This transaction was executed in multiple trades at prices ranging from $58.04 to $58.48, 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 (8) of this Form 4.

SEC source: 0000905148-26-003820 · form4.xml · nonDerivative · entry 5

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,593,478

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026.

F7 · price: This transaction was executed in multiple trades at prices ranging from $57.015 to $57.99, 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.

SEC source: 0000905148-26-003820 · form4.xml · nonDerivative · entry 4

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,605,958

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026.

F6 · price: This transaction was executed in multiple trades at prices ranging from $56.01 to $57.00, 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.

SEC source: 0000905148-26-003820 · form4.xml · nonDerivative · entry 3

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,612,443

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026.

F5 · price: This transaction was executed in multiple trades at prices ranging from $58.81 to $58.90, 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.

SEC source: 0000905148-26-003820 · form4.xml · nonDerivative · entry 2

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,614,221

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026.

F4 · price: This transaction was executed in multiple trades at prices ranging from $57.81 to $58.80, 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.

SEC source: 0000905148-26-003820 · form4.xml · nonDerivative · entry 1

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 2,627,811

F2 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 18, 2026.

F3 · price: This transaction was executed in multiple trades at prices ranging from $56.80 to $57.75, 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.

F1 · balance_after: These numbers have been adjusted to reflect the 3-for-1 forward stock split, which became effective on July 21, 2026 (the "Stock Split").

SEC source: 0000905148-26-001549 · form4.xml · nonDerivative · entry 1

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 881,281

F1 · shares: Return to Issuer of previously restricted shares to satisfy withholding tax liability.

SEC source: 0000905148-26-001487 · form4.xml · nonDerivative · entry 10

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 924,231

F10 · price: This transaction was executed in multiple trades at prices ranging from $170.09 to $170.67, 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 (10) of this Form 4.

SEC source: 0000905148-26-001487 · form4.xml · nonDerivative · entry 9

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 924,668

F9 · price: This transaction was executed in multiple trades at prices ranging from $169.005 to $170.00, 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 (9) of this Form 4.

SEC source: 0000905148-26-001487 · form4.xml · nonDerivative · entry 8

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 925,968

F8 · price: This transaction was executed in multiple trades at prices ranging from $166.10 to $166.90, 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 (8) of this Form 4.

SEC source: 0000905148-26-001487 · form4.xml · nonDerivative · entry 7

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 926,568

F7 · price: This transaction was executed in multiple trades at prices ranging from $164.97 to $165.46, 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.

SEC source: 0000905148-26-001487 · form4.xml · nonDerivative · entry 6

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 927,513

F6 · price: This transaction was executed in multiple trades at prices ranging from $167.50 to $168.36, 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.

SEC source: 0000905148-26-001487 · form4.xml · nonDerivative · entry 5

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 927,844

F5 · price: This transaction was executed in multiple trades at prices ranging from $166.41 to $167.12, 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.

SEC source: 0000905148-26-001487 · form4.xml · nonDerivative · entry 4

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 928,935

F4 · price: This transaction was executed in multiple trades at prices ranging from $164.01 to $164.81, 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.

SEC source: 0000905148-26-001487 · form4.xml · nonDerivative · entry 3

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 930,170

F3 · price: This transaction was executed in multiple trades at prices ranging from $163.00 to $163.975, 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.

SEC source: 0000905148-26-001487 · form4.xml · nonDerivative · entry 2

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 931,375

F2 · price: This transaction was executed in multiple trades at prices ranging from $161.91 to $162.90, 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.

SEC source: 0000905148-26-001455 · form4.xml · nonDerivative · entry 10

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 933,234

F8 · price: This transaction was executed in multiple trades at prices ranging from $170.645 to $171.50, 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 (8) of this Form 4.

SEC source: 0000905148-26-001455 · form4.xml · nonDerivative · entry 9

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 935,300

F7 · price: This transaction was executed in multiple trades at prices ranging from $169.64 to $170.63, 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.

SEC source: 0000905148-26-001455 · form4.xml · nonDerivative · entry 8

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 940,952

F6 · price: This transaction was executed in multiple trades at prices ranging from $168.60 to $169.59, 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.

SEC source: 0000905148-26-001455 · form4.xml · nonDerivative · entry 7

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 942,483

F5 · price: This transaction was executed in multiple trades at prices ranging from $167.57 to $168.47, 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.

SEC source: 0000905148-26-001455 · form4.xml · nonDerivative · entry 6

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 942,961

SEC source: 0000905148-26-001455 · form4.xml · nonDerivative · entry 5

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 943,761

SEC source: 0000905148-26-001455 · form4.xml · nonDerivative · entry 4

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 943,861

F4 · price: This transaction was executed in multiple trades at prices ranging from $172.30 to $172.42, 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 (4) of this Form 4.

SEC source: 0000905148-26-001455 · form4.xml · nonDerivative · entry 3

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 944,061

F3 · price: This transaction was executed in multiple trades at prices ranging from $170.86 to $171.85, 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.

SEC source: 0000905148-26-001455 · form4.xml · nonDerivative · entry 2

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 947,231

F2 · price: This transaction was executed in multiple trades at prices ranging from $177.45 to $177.77, 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.

SEC source: 0000905148-26-001455 · form4.xml · nonDerivative · entry 1

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 948,231

F1 · price: This transaction was executed in multiple trades at prices ranging from $175.84 to $176.165, 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 (1) of this Form 4.

SEC source: 0000905148-26-001420 · form4.xml · nonDerivative · entry 1

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 949,231

F1 · shares: Return to Issuer of previously restricted shares to satisfy withholding tax liability.

SEC source: 0000905148-26-001487 · form4.xml · nonDerivative · entry 1

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Indirect · Spouse

Disclosed balance after: 13,560

F1 · ownership.nature: Charlotte Montressor Willis.

SEC source: 0000905148-26-001386 · form4.xml · derivative · entry 6

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 10,888 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_price: Performance-based restricted stock award ("PSA") granted in 2025 subject to performance-based and time-based vesting over two years. Performance-based vesting criteria, which included a combination of profitability of the Issuer's services businesses, growth of the Issuer's leasing portfolio and the viability of the Issuer's Sustainable Aviation Fuel initiative, were certified on March 16, 2026. Each PSA represents a contingent right to receive one share of the Issuer's common stock upon vesting.

F5 · shares: Reported amount has been adjusted to reflect the actual number of PSAs earned, based on the extent to which the performance-based vesting criteria were achieved. The remaining 9,212 PSAs of the 100% target amount reported in the Form 4 filed by the Reporting Person on January 6, 2025 were forfeited.

F1 · price: Performance-based restricted stock award ("PSA") granted in 2025 subject to performance-based and time-based vesting over two years. Performance-based vesting criteria, which included a combination of profitability of the Issuer's services businesses, growth of the Issuer's leasing portfolio and the viability of the Issuer's Sustainable Aviation Fuel initiative, were certified on March 16, 2026. Each PSA represents a contingent right to receive one share of the Issuer's common stock upon vesting.

F1 · derivative.exercise_date: Performance-based restricted stock award ("PSA") granted in 2025 subject to performance-based and time-based vesting over two years. Performance-based vesting criteria, which included a combination of profitability of the Issuer's services businesses, growth of the Issuer's leasing portfolio and the viability of the Issuer's Sustainable Aviation Fuel initiative, were certified on March 16, 2026. Each PSA represents a contingent right to receive one share of the Issuer's common stock upon vesting.

F1 · derivative.expiration_date: Performance-based restricted stock award ("PSA") granted in 2025 subject to performance-based and time-based vesting over two years. Performance-based vesting criteria, which included a combination of profitability of the Issuer's services businesses, growth of the Issuer's leasing portfolio and the viability of the Issuer's Sustainable Aviation Fuel initiative, were certified on March 16, 2026. Each PSA represents a contingent right to receive one share of the Issuer's common stock upon vesting.

F5 · derivative.underlying_shares: Reported amount has been adjusted to reflect the actual number of PSAs earned, based on the extent to which the performance-based vesting criteria were achieved. The remaining 9,212 PSAs of the 100% target amount reported in the Form 4 filed by the Reporting Person on January 6, 2025 were forfeited.

F5 · balance_after: Reported amount has been adjusted to reflect the actual number of PSAs earned, based on the extent to which the performance-based vesting criteria were achieved. The remaining 9,212 PSAs of the 100% target amount reported in the Form 4 filed by the Reporting Person on January 6, 2025 were forfeited.

SEC source: 0000905148-26-001386 · form4.xml · nonDerivative · entry 2

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 954,821

F2 · shares: Return to Issuer of previously restricted shares to satisfy withholding tax liability.

SEC source: 0000905148-26-001386 · form4.xml · nonDerivative · entry 1

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 956,176

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · shares: Performance-based restricted stock award ("PSA") granted in 2025 subject to performance-based and time-based vesting over two years. Performance-based vesting criteria, which included a combination of profitability of the Issuer's services businesses, growth of the Issuer's leasing portfolio and the viability of the Issuer's Sustainable Aviation Fuel initiative, were certified on March 16, 2026. Each PSA represents a contingent right to receive one share of the Issuer's common stock upon vesting.

F1 · price: Performance-based restricted stock award ("PSA") granted in 2025 subject to performance-based and time-based vesting over two years. Performance-based vesting criteria, which included a combination of profitability of the Issuer's services businesses, growth of the Issuer's leasing portfolio and the viability of the Issuer's Sustainable Aviation Fuel initiative, were certified on March 16, 2026. Each PSA represents a contingent right to receive one share of the Issuer's common stock upon vesting.

SEC source: 0000905148-26-000062 · form4.xml · derivative · entry 6

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,974

Underlying: Common Stock · 29,974 shares

Expires not disclosed

F5 · derivative.exercise_price: Grant of performance-based restricted stock award ("PSA") subject to performance-based and time-based vesting over three years. Performance-based vesting criteria include a combination of return on equity and combined value of the issuer's businesses and its fund, joint venture, and managed portfolios. Each PSA represents a contingent right to receive one share of the Issuer's common stock to the extent the performance-based criteria is met. Reported amount assumes 100% performance-based vesting, but actual number of PSAs earned may be 25% more or less than the reported amount, depending on the extent to which the performance-based vesting criteria are met or not met.

F5 · derivative.exercise_date: Grant of performance-based restricted stock award ("PSA") subject to performance-based and time-based vesting over three years. Performance-based vesting criteria include a combination of return on equity and combined value of the issuer's businesses and its fund, joint venture, and managed portfolios. Each PSA represents a contingent right to receive one share of the Issuer's common stock to the extent the performance-based criteria is met. Reported amount assumes 100% performance-based vesting, but actual number of PSAs earned may be 25% more or less than the reported amount, depending on the extent to which the performance-based vesting criteria are met or not met.

F5 · derivative.expiration_date: Grant of performance-based restricted stock award ("PSA") subject to performance-based and time-based vesting over three years. Performance-based vesting criteria include a combination of return on equity and combined value of the issuer's businesses and its fund, joint venture, and managed portfolios. Each PSA represents a contingent right to receive one share of the Issuer's common stock to the extent the performance-based criteria is met. Reported amount assumes 100% performance-based vesting, but actual number of PSAs earned may be 25% more or less than the reported amount, depending on the extent to which the performance-based vesting criteria are met or not met.

SEC source: 0000905148-26-000062 · form4.xml · nonDerivative · entry 2

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 945,288

F2 · shares: Return to issuer of previously restricted shares to satisfy withholding tax liability.

SEC source: 0000905148-26-000062 · form4.xml · nonDerivative · entry 1

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 947,028

F1 · shares: Restrictive Stock Grant vesting over three years.

SEC source: 0000905148-25-004258 · form4.xml · nonDerivative · entry 1

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 927,046

F1 · shares: Shares repurchased by Willis Lease Finance Corporation.

F2 · price: The price reported above represents the volume weighted average price as of December 4, 2025 discounted by 2%.

SEC source: 0000905148-25-004133 · form4.xml · derivative · entry 1

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 300,000

Underlying: Common Stock · 300,000 shares

Expires 2031-11-10

F1 · derivative.exercise_price: This option was granted with an exercise price equal to the greater of (i) Fair Market Value (as defined in the Issuer's 2023 Incentive Stock Plan) of the Issuer's common stock on November 10, 2025 (the "Grant Date") and (ii) the five-day average volume weighted average Fair Market Value of the Issuer's common stock for the five trading days occurring from (and including) the Grant Date through (and including) November 14, 2025. Accordingly, once the exercise price for this option was fixed on November 14, 2025, this option became a "derivative security," as such term is defined in Rule 16a-1(c) under the Securities Exchange Act of 1934, as amended (the "Exchange Act"), and reportable under Section 16 of the Exchange Act.

F2 · derivative.exercise_date: This option vests in four equal installments on November 10, 2026, November 10, 2027, November 10, 2028, and November 10, 2029.

SEC source: 0000905148-25-002979 · form4.xml · nonDerivative · entry 9

WILLIS CHARLES F IV · CIK 0001033309 · Director · Executive Chairman · 10% owner

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 957,046

F9 · price: This transaction was executed in multiple trades at prices ranging from $157.175 to $157.18, 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 (9) of this Form 4.