William Blair & Company
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William Blair & Company’s GATX Corp GATX Stock Holding History

William Blair & Company’s Portfolio GATX Stock Details GATX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$409K Buy
2,395
+157
+7% +$28.2K ﹤0.01% 1218
2025
Q4 		$380K Buy
2,238
+196
+10% +$32.3K ﹤0.01% 1230
2025
Q3 		$357K Buy
2,042
+278
+16% +$45K ﹤0.01% 1243
2025
Q2 		$271K Buy
+1,764
New +$264K ﹤0.01% 1299

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William Blair & Company's GATX Position: Q1 2026 in Review

William Blair & Company increased its GATX Corp (GATX) stake by 7% in Q1 2026, buying an estimated $28.2K and bringing the position to 2,395 shares worth $409K. The position accounts for ﹤0.01% of the portfolio, ranked #1218.

William Blair & Company first reported a position in GATX in Q2 2025 and has held it in 4 quarters since. 394 funds tracked by Wall St. Rank hold GATX as of Q1 2026.

  • William Blair & Company held 2,395 shares of GATX Corp worth $409K as of Q1 2026.
  • William Blair & Company bought 157 GATX Corp shares in Q1 2026, an estimated $28.2K.
  • GATX Corp made up ﹤0.01% of William Blair & Company's portfolio in Q1 2026, its #1218 holding.
  • William Blair & Company first reported a position in GATX Corp in Q2 2025 and has held it in 4 quarters since.
  • 394 funds tracked by Wall St. Rank held GATX Corp as of Q1 2026.

Based on William Blair & Company's 13F filing for Q1 2026, filed 8 May 2026.