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GATX · Gatx Corp

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Market Cap
$6.27B
Shares
35.30M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 409
Total Value: $6,441,392,731
Total Shares: 36,353,028
Showing 1–100 of 415 holdings by value · page 1 of 5

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 409 13F filers · Δ vs Mar 31, 2026
Top Holder
14.9%
Sep 2023 → Jun 2026 · range 14.9% – 16.5%
−0.4 pts
Top 5
44.8%
Sep 2023 → Jun 2026 · range 44.8% – 55.3%
−0.8 pts
Top 10
62.3%
Sep 2023 → Jun 2026 · range 62.3% – 72.3%
−0.7 pts
HHI
590
Sep 2023 → Jun 2026 · range 590 – 760
Broadly held−17

Quarterly Activity

vs Mar 31, 2026
New
49
Increased
129
Decreased
141
Sold Out
38
Unchanged
90
Holder count: +11
Institutional value: +6.5%
Shares held: +2.7%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 415
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 40211 CUSIP 361448103 13F (30d) 283 filings 277 filers Visit website Investor relations