Niyi Adedoyin - 23 Feb 2026 Form 4 Insider Report for GATX CORP (GATX)

Role: SVP & CIO
Signature: Lisa M. Ibarra, by Power of Attorney on behalf of Niyi Adedoyin
Issuer symbol: GATX
Transactions as of: 23 Feb 2026
Net transactions value: $0
Form type: 4
Filing time: 25 Feb 2026, 18:02:52 UTC
Previous filing: 05 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Adedoyin Niyi	SVP & CIO	233 S. WACKER DR., CHICAGO	Lisa M. Ibarra, by Power of Attorney on behalf of Niyi Adedoyin	25 Feb 2026	0001665666

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	GATX	Common Stock						3,902	23 Feb 2026	Direct
holding	GATX	Common Stock 401(k)						3,818	23 Feb 2026	401(k)	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	GATX	2026 NQ Stock Option (Right to Buy)	Award	$0	+3,300		$0.000000	3,300	23 Feb 2026	Common Stock	3,300	$196.40	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	GATX Corporation's 401(k) plan is a unitized stock fund made up of company stock plus short term investments. Because the fund includes more than company stock, participants hold units of the fund rather than company shares of stock. The number of units held by a participant may vary depending on the performance of the company stock, the overall stock market, and the amount of short term investments in the fund. Such a variance has caused the value of the units in the reporting person's 401(k) fund to be reduced without any actual disposition of shares.
F2	33.33% of Stock Option granted may be exercised commencing 1 year from the date of the grant, an additional 33.33% commencing 2 years from the date of the grant and the remaining 33.34% commencing 3 years from the date of the grant.

Content

GATX Corporation's 401(k) plan is a unitized stock fund made up of company stock plus short term investments. Because the fund includes more than company stock, participants hold units of the fund rather than company shares of stock. The number of units held by a participant may vary depending on the performance of the company stock, the overall stock market, and the amount of short term investments in the fund. Such a variance has caused the value of the units in the reporting person's 401(k) fund to be reduced without any actual disposition of shares.

33.33% of Stock Option granted may be exercised commencing 1 year from the date of the grant, an additional 33.33% commencing 2 years from the date of the grant and the remaining 33.34% commencing 3 years from the date of the grant.