[Form 4] GATX Corporation Insider Trading Activity

Rhea-AI Filing Summary

Robert C. Lyons, President and CEO of GATX Corporation, reported multiple transactions on 09/03/2025. He exercised 18,500 non-qualified stock options with an exercise price of $71.525, resulting in the acquisition of 18,500 shares. On the same date he reported a series of sales: 43 shares at a weighted average sale price of $166.2001, 9,556 shares at a weighted average sale price of $166.0417, 2,936 shares at a weighted average sale price of $167.2388, and 100 shares at $167.76. The Form 4 shows direct beneficial ownership following these transactions of 50,575 shares and indirect ownership of 3,267 shares held in a 401(k). The filing includes weighted average sale price ranges for the sales and notes that breakdowns by price are available on request.

Insights

Financial Analyst

TL;DR: CEO exercised options and sold multiple share blocks on the same day; net direct holdings remain disclosed as 50,575 shares.

The Form 4 documents an option exercise of 18,500 shares at $71.525 and contemporaneous open-market sales in multiple tranches at weighted average prices in the $165.74–$167.71 range. The filing reports final direct beneficial ownership of 50,575 shares and 3,267 shares indirectly via a 401(k). This is a routine Section 16 filing that updates ownership levels and provides sale price ranges; it does not include company financial performance metrics or forward guidance.

Corporate Governance Expert

TL;DR: Insider disclosed option exercise and subsequent sales; reporting appears complete with explanatory price ranges and POA signature.

The document names the reporting person, relationship (Director and President/CEO), transaction dates, codes (M for option exercise, S for sale), and provides explanatory notes for weighted average sale prices. The form is signed by power of attorney and includes the number of shares beneficially owned after the transactions. The filing meets standard disclosure elements required under Section 16 without additional qualifiers.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

LYONS ROBERT C

(Last) (First) (Middle)

233 S. WACKER DR.

(Street)

CHICAGO IL 60606

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
GATX CORP [ GATX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President and CEO

3. Date of Earliest Transaction (Month/Day/Year)
09/03/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/03/2025		M		18,500	A	$71.525	63,210	D
Common Stock	09/03/2025		S		43	D	$166.2001	63,167	D
Common Stock	09/03/2025		S		9,556	D	$166.0417(1)	53,611	D
Common Stock	09/03/2025		S		2,936	D	$167.2388(2)	50,675	D
Common Stock	09/03/2025		S		100	D	$167.76	50,575	D
Common Stock 401(k)								3,267	I	401(k)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
2019 NQ Stock Option (Right to Buy)	$71.525	09/03/2025		M			18,500	01/24/2020	01/24/2026	Common Stock	18,500	$0.00	0.00	D

Explanation of Responses:

1. Represents the weighted average sale price. The highest price at which shares were sold was $166.7150 and the lowest price at which shares were sold was $165.7400. Information regarding the number of shares sold at each separate price will be made available from the reporting person upon request by the SEC, the issuer or its shareholders.

2. Represents the weighted average sale price. The highest price at which shares were sold was $167.7100 and the lowest price at which shares were sold was $166.7500. Information regarding the number of shares sold at each separate price will be made available from the reporting person upon request by the SEC, the issuer or its shareholders.

Remarks:

	Lisa M. Ibarra, by Power of Attorney on behalf of Robert C. Lyons	09/05/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What transactions did GATX (GATX) insider Robert C. Lyons report on 09/03/2025?

The Form 4 shows an exercise of 18,500 NQ stock options at $71.525 and sales of 43, 9,556, 2,936 and 100 shares on 09/03/2025 at weighted average prices in the $165.74–$167.71 range.

How many GATX shares did Robert C. Lyons own after the reported transactions?

Following the reported transactions, the Form 4 discloses 50,575 shares beneficially owned directly and 3,267 shares indirectly held in a 401(k).

What was the exercise price for the options exercised by Robert C. Lyons?

The exercised 2019 non-qualified stock option had an exercise price of $71.525.

Are the sale prices for the shares fully detailed?

The filing provides weighted average sale prices and ranges for the sales and states that the number of shares sold at each separate price is available upon request to the SEC, issuer, or shareholders.

Who signed the Form 4 for Robert C. Lyons?

The form was signed on behalf of Robert C. Lyons by Lisa M. Ibarra, by Power of Attorney on 09/05/2025.