GATX Kim K. Nero proposes $4.48M share sale

The notice reports a $4,480,063.73 aggregate market value and says the shares were acquired by exercising options under a registered plan.

Available on EDGAR 11/04/2026 - 04:19 PM EST Accepted by SEC EDGAR 11/04/2026 - 04:19 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Kim K. Nero, identified as a former officer of GATX Corporation, gave notice of a proposed sale of 23,666 common shares, with a proposed sale date of November 4, 2026. Morgan Stanley Smith Barney LLC is listed as the broker, and the reported aggregate market value is $4,480,063.73. The shares were acquired from the issuer through exercise of options under a registered plan, with cash payment.

Key Figures

Proposed sale: 23,666 common shares Aggregate market value: $4,480,063.73 Shares outstanding: 34,899,209 shares +1 more

4 metrics

Proposed sale 23,666 common shares Kim K. Nero

Aggregate market value $4,480,063.73 Proposed sale

Shares outstanding 34,899,209 shares GATX Corporation

Proposed sale date November 4, 2026 Proposed sale of common shares

Key Terms

Exercise of Options Under a Registered Plan, Rule 144

2 terms

Exercise of Options Under a Registered Plan financial

"Exercise of Options Under a Registered Plan"

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144"

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many GATX shares did Kim K. Nero propose to sell?

Kim K. Nero gave notice of a proposed sale of 23,666 GATX common shares, with a proposed sale date of November 4, 2026.

What is the reported value of Kim K. Nero's proposed GATX share sale?

The reported aggregate market value for the proposed sale of 23,666 common shares is $4,480,063.73.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001861020
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	GATX CORPORATION
SEC File Number	001-02328
Address of Issuer	233 South Wacker Drive Chicago ILLINOIS 60606-7147
Phone	(312) 621-6200
Name of Person for Whose Account the Securities are To Be Sold	KIM K NERO
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Former Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004	23666	4480063.73	34899209	11/04/2026	NYSE

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	11/04/2026	Exercise of Options Under a Registered Plan	Issuer			23666	11/04/2026	Cash

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	11/04/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Kimberly Nero
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)