8-K

UNITED STATES

SECURITIES ANDEXCHANGE COMMISSION

Washington, D.C.20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13OR 15(d) OF THE

SECURITIES EXCHANGEACT OF 1934

Date of Report (Date of earliest event reported): May 25, 2022

Willis Lease Finance Corporation

(Exact Name of Registrant as Specified in Charter)

4700 Lyons Technology Parkway

Coconut Creek, FL 33076

(Address of Principal Executive Offices) (Zip Code)

Registrant’s telephone number, including area code:

(561) 349-9989

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

¨ Pre-commencement communications pursuant Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Securities registered pursuant to Section 12(b) of the Act:

Item 5.07 Submission of Matters to a Vote of Security Holders

On May 25, 2022, Willis Lease Finance Corporation (the “Company”) held its Annual Meeting of Stockholders (the “Annual Meeting”). At the close of business on April 8, 2022, the voting record date, there were 6,659,468 common shares issued and outstanding and entitled to vote. At the Annual Meeting, 5,878,362 shares, or 88%, of the outstanding common shares entitled to vote were represented by proxy or in person.

Proposal 1: Election of Directors. The stockholders elected two Class III Directors for a three-year term expiring at the 2025 Annual Meeting of Stockholders. The voting results were as follows:

Number of Votes Cast:

The other directors whose term of office continued after the Annual Meeting were Robert J. Keady, Rae Ann McKeating and Austin C. Willis.

Proposal 2: Ratification of Appointment of IndependentRegistered Public Accounting Firm. The stockholders ratified the appointment of Grant Thornton LLP as the Company’s independent auditors for the year 2022. The voting results were as follows:

Number of Votes Cast:

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by its undersigned duly authorized officer.

Dated: May 26, 2022