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 25, 2025

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
Common Stock, $1.00 par value	AIR	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 7.01. Regulation FD Disclosure.

On September 25, 2025, AAR CORP. (the “Company”) issued a press release announcing the acquisition of American Distributors Holding Co., LLC, including ADI American Distributors, LLC, and other subsidiaries (“ADI”). ADI is a leading distributor of components and assemblies to customers in the commercial and defense markets. A copy of the press release is furnished and attached as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

The information in this Item 7.01 and Exhibit 99.1 attached hereto shall not be deemed “filed” for purposes of Section 18 of the Exchange Act, nor shall it be deemed incorporated by reference in any filing under the Securities Act, except as shall be expressly set forth by specific reference in such filing.

Item 8.01. Other Events.

On September 25, 2025, the Company acquired ADI for a purchase price of $146 million in cash, subject to post-closing adjustments for working capital, cash, and debt. The cash purchase price was funded using the Company’s existing revolving credit facility.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits

Exhibit No.		Description

99.1		Press release issued by AAR CORP. on September 25, 2025
104		Cover Page Interactive Data File (the cover page XBRL tags are embedded in the Inline XBRL document)

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 25, 2025

	AAR CORP.

	By:	/s/ Jessica A. Garascia
		Jessica A. Garascia
		Senior Vice President, General Counsel, Chief Administrative Officer and Secretary

AAR CORP 8-K