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): October 21, 2025

GATX Corporation

(Exact name of registrant as specified in its charter)

New York

1-2328

36-1124040

(State or other jurisdiction
of incorporation)

(Commission
File Number)

(IRS Employer
Identification No.)

233 South Wacker Drive

Chicago, Illinois 60606-7147

(Address of principal executive offices, including zip code)

(312) 621-6200

(Registrant’s telephone number, including area code)

__________________________

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 communication 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	GATX	New York Stock Exchange
		NYSE Texas, Inc

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 2.02 Results of Operations and Financial Condition.

Item 7.01 Regulation FD Disclosure.

The following information is furnished pursuant to Item 2.02, "Results of Operations and Financial Condition" and Item 7.01, "Regulation FD Disclosure" and shall not be deemed "filed" for purposes of Section 18 of the Securities and Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section.

On October 21, 2025, GATX Corporation ("GATX") issued a press release that included unaudited financial statements and supplemental financial information for the quarter ended September 30, 2025. A copy of the press release is attached hereto as Exhibit 99.1.

GATX will host a teleconference to discuss its 2025 third-quarter financial results on October 21, 2025, beginning at 11 a.m. Eastern Time. Investors may access the conference by dialing 1-800-715-9871 (or 1-646-307-1963 if dialing from outside the United States).

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits



Exhibit No.						Description
99.1						Press Release of GATX Corporation, dated October 2 1 , 2025, reporting GATX Corporation's results for the quarter ended September 30, 2025.
104						Cover Page Interactive Data File (embedded within 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.



GATX CORPORATION
(Registrant)

/s/ Thomas A. Ellman
Thomas A. Ellman
Executive Vice President and Chief Financial Officer

October 21, 2025

GATX CORP 8-K