[144] GATX Corporation SEC Filing

Rhea-AI Filing Summary

GATX filed a Form 144 reporting a proposed sale of common stock. The filing lists 12,635 shares to be sold through Morgan Stanley Smith Barney LLC on 09/03/2025, with an aggregate market value of $2,101,630.09. The filing reports 35,600,000 shares outstanding for the class. The securities were acquired and are being sold on 09/03/2025 following an exercise of options under a registered plan, and payment for the acquisition was in cash. No securities of the issuer were reported sold by the seller in the past three months. The filer certifies they are not aware of undisclosed material adverse information.

Insights

Securities Analyst

TL;DR: Routine Form 144 disclosing an option exercise and proposed sale of 12,635 GATX shares, recorded through a major broker.

The filing documents a proposed sale following exercise of options under a registered plan, executed and slated for sale the same day, routed through Morgan Stanley Smith Barney LLC. The aggregate value is stated and outstanding share count is provided, enabling straightforward calculation of the position's size relative to the share base. No prior sales in the last three months are reported. This is a standard insider liquidity disclosure and, on its face, provides required transparency without revealing additional corporate developments.

Corporate Governance Expert

TL;DR: Disclosure aligns with Rule 144 requirements; signer attests no undisclosed material adverse information.

The form includes the required representations about absence of undisclosed material adverse information and notes the transaction type (option exercise under a registered plan) and cash payment. The use of a registered broker and clear attribution of acquisition method meets common governance and compliance practices for insider transactions. The filing does not indicate any governance changes or regulatory concerns; it functions as a compliance disclosure of a planned sale.

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

144: Issuer Information

Name of Issuer

SEC File Number

Address of Issuer

Phone

Name of Person for Whose Account the Securities are To Be Sold

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

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	12635	2101630.09	35600000	09/03/2025	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	09/03/2025	Exercise of options under a registered plan	Issuer			12635	09/03/2025	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

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

ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)

FAQ

What does the GATX Form 144 filed on 09/03/2025 report?

The filing reports a proposed sale of 12,635 common shares of GATX, to be sold through Morgan Stanley Smith Barney LLC on 09/03/2025, aggregate value $2,101,630.09.

How were the GATX shares acquired that are being sold under the Form 144?

The shares were acquired on 09/03/2025 by exercise of options under a registered plan, and payment for the acquisition was made in cash.

Does the Form 144 show any other sales by the seller in the past three months?

No. The filing states "Nothing to Report" for securities sold during the past three months.

What is the reported number of outstanding shares for the class in the filing?

The filing reports 35,600,000 shares outstanding for the class.

Who is the broker named in the Form 144 for the proposed sale?

The broker named is Morgan Stanley Smith Barney LLC, located at Executive Financial Services, 1 New York Plaza, 8th Floor, New York, NY 10004.