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Form 8-K

sec.gov

8-K — AAR CORP

Accession: 0001104659-26-110332

Filed: 2026-09-24

Period: 2026-09-23

CIK: 0000001750

SIC: 3720 (AIRCRAFT & PARTS)

Item: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

Item: Submission of Matters to a Vote of Security Holders

Item: Financial Statements and Exhibits

Documents

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Common Stock, $1.00 par value

AIR

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13

or 15(d) of

the Securities Exchange Act of 1934

Date of Report (Date of Earliest Event Reported):

September 23, 2026

AAR

CORP.

(Exact name of registrant as specified in its

charter)

Delaware

1-6263

36-2334820

(State of Incorporation )

(Commission

File Number)

(IRS Employer Identification No.)

One AAR Place

1100 N. Wood Dale Road

Wood Dale, Illinois 60191

(Address and Zip Code of Principal Executive Offices)

Registrant’s telephone number, including

area code: (630) 227-2000

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 to Rule 13e-4(c) under

the Exchange Act (17 CFR 240.13e-4(c))

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

Title of Each Class

Trading Symbol(s)

Name of Each Exchange on Which

Registered

Common

Stock, $1.00 par value

AIR

New

York Stock Exchange

NYSE Texas

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 Exchange

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. ¨

Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of

Certain Officers.

As

described in Item 5.07 below, on September 23, 2026, at the 2026 Annual Meeting of Stockholders (the “Annual Meeting”) of

AAR CORP. (the “Company”), the stockholders of the Company approved the AAR CORP. 2026

Stock Plan (referred to as “our new stock plan”), which provides for discretionary grants of stock options, stock awards,

stock unit awards, stock appreciation rights and other stock-based and cash-based awards to employees, non-employee directors and certain

other eligible service providers. Our new stock plan was previously approved by the Company’s Board of Directors and is more fully

described in the related proposal in the Company’s Proxy Statement filed on August 4, 2026.

The

foregoing description of our new stock plan is qualified in its entirety by reference to the full text of our new stock plan, which is

filed as Exhibit 10.1 to this Current Report on Form 8-K and incorporated herein by reference.

Item 5.07. Submission of Matters to a Vote of Security Holders.

On September 23, 2026, the

Company held its Annual Meeting. At the Annual Meeting, 37,391,244 shares of common stock, par value

$1.00 per share, or approximately 93% of the 40,258,840 shares of common stock outstanding and entitled

to vote at the Annual Meeting, were present in person or by proxy. Set forth below are the matters acted upon by the Company’s stockholders

at the Annual Meeting, as such matters are more fully described in the Company’s Proxy Statement filed on August 4, 2026, and the

final voting results on each such matter.

Proposal 1:

Election of Directors.

The stockholders elected each

of the Company’s Class III director nominees to the Board of Directors for a three-year term expiring at the 2029 annual meeting

of stockholders, as reflected in the following voting results:

Name of Nominee

For

Against

Abstain

Broker

Non-Vote

John W. Dietrich

34,722,656

1,071,178

12,433

1,584,977

Robert F. Leduc

34,715,647

1,078,327

12,293

1,584,977

Peter Pace

33,584,745

2,209,353

12,169

1,584,977

The continuing directors of the Company are Michael

R. Boyce, Jeffrey N. Edwards, John M. Holmes, Ellen M. Lord, Billy J. Nolen, Jennifer L. Vogel, Marc J. Walfish, and Hema Widhani.

Proposal 2:

Advisory Proposal to Approve our Fiscal

Year 2026 Executive Compensation.

The stockholders approved

the advisory proposal for our Fiscal Year 2026 executive compensation, as reflected in the following voting results:

For

Against

Abstain

Broker Non-Vote

34,285,245

1,475,837

45,185

1,584,977

Proposal 3:

Approval of our New Stock Plan.

The stockholders approved

our new stock plan, as reflected in the following voting results:

For

Against

Abstain

Broker Non-Vote

33,805,637

1,984,579

16,051

1,584,977

2

Proposal 4:

Ratification of Appointment of Independent

Registered Public Accounting Firm.

The stockholders ratified

the appointment of KPMG LLP as the Company’s independent registered public accounting firm for the fiscal year ending May 31, 2027,

as reflected in the following voting results:

For

Against

Abstain

36,470,764

905,880

14,600

Item 9.01. Financial Statements and Exhibits.

(d)                     Exhibits

Exhibit No.

Description

10.1

AAR CORP. 2026 Stock Plan (incorporated by reference to Appendix C to the Company’s Proxy Statement filed on August 4, 2026)

104

Cover Page Interactive Data File (embedded in the Inline XBRL document)

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SIGNATURE

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 the undersigned hereunto duly authorized.

Date: September 24, 2026

AAR CORP.

By:

/s/ Jessica A. Garascia

Jessica A. Garascia

Senior Vice President, General Counsel,

Chief Administrative Officer and Secretary

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