v3.26.1
GATX Corporation Master Trust
 12 Months Ended
Dec. 31, 2025
EBP 002  
EBP, Master Trust [Line Items]  
GATX Corporation Master Trust GATX Corporation Master Trust
The Plan's investments are held in the GATX Corporation Master Trust (Master Trust) which was established for the investment of assets of the Plan and one other Company sponsored retirement savings plan. The Master Trust assets are allocated among the participating plans by assigning to each plan those transactions (primarily contributions, benefit payments and plan-specific expenses) that can be specifically identified and by allocating among both plans, in proportion to the fair value of the assets assigned to each plan, income and expenses resulting from the collective investment of the assets of the Master Trust.
The following tables present the Master Trust balances and the Plan's interest in the Master Trust balances:
December 31, 2025
Master Trust BalancesPlan's Interest in Master Trust Balances
Mutual funds$114,161,653  $97,117,908 
GATX common stock fund31,944,636 30,995,772 
Collective trusts141,449,235 135,641,629 
Total investments at fair value
287,555,524 263,755,309 
Plus:
Other receivables
918 891 
Net assets at end of year$287,556,442 $263,756,200 
December 31, 2024
Master Trust BalancesPlan's Interest in Master Trust Balances
Mutual funds$98,986,627 $84,186,812 
GATX common stock fund30,869,976 29,640,088 
Collective trusts130,498,282 124,398,524 
Total investments at fair value
260,354,885 238,225,424 
Plus:
Other receivables
1,195 1,147 
Net assets at end of year$260,356,080 $238,226,571 
The following table presents the net appreciation in fair value of investments and investment income of the Master Trust:
Years Ended December 31
20252024
Net appreciation in fair value of investments$34,373,723 $34,703,767 
Interest and dividend income3,958,425 3,692,811 
Total investment income38,332,148 $38,396,578