GATX Corporation Master Trust (Tables)

12 Months Ended

Dec. 31, 2025

EBP 004

EBP, Master Trust [Line Items]

Schedule of Master Trust Net Assets

The following tables present the Master Trust balances and the Plan's interest in the Master Trust balances:

	December 31, 2025
	Master Trust Balances		Plan's Interest in Master Trust Balances
Mutual funds	$	114,161,653	$	17,043,745
GATX common stock fund	31,944,636		948,864
Collective trusts	141,449,235		5,807,606
Total investments at fair value	287,555,524		23,800,215
Plus:
Other receivables	918		27
Net assets at end of year	$	287,556,442	$	23,800,242

	December 31, 2024
	Master Trust Balances		Plan's Interest in Master Trust Balances
Mutual funds	$	98,986,627	$	14,799,815
GATX common stock fund	30,869,976		1,229,888
Collective trusts	130,498,282		6,099,758
Total investments at fair value	260,354,885		22,129,461
Plus:
Other receivables	1,195		48
Net assets at end of year	$	260,356,080	$	22,129,509

The following table presents the net appreciation in fair value of investments and investment income of the Master Trust:

	Years Ended December 31
	2025		2024
Net appreciation in fair value of investments	$	34,373,723	$	34,703,767
Interest and dividend income	3,958,425		3,692,811
Total investment income	$	38,332,148	$	38,396,578