GATX
GATX Corporation · Industrials · Rental & Leasing Services
Momentum inputs (comparable managers):
holder breadth +20.0% ·
share flow -1.3% ·
net new positions +16.7%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2024
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 112 | -3 | 27.62M | $4.89B | +4 | −6 |
| Q1 2026 | 117 | -1 | 26.95M | $4.60B | +3 | −5 |
| Q4 2025 | 118 | -2 | 29.48M | $5.00B | +1 | −2 |
| Q3 2025 | 19 | 0 | 13.96M | $2.44B | +1 | −2 |
| Q2 2025 | 17 | +1 | 13.66M | $2.10B | +1 | — |
| Q1 2025 | 13 | +2 | 5.18M | $805.04M | +2 | — |
| Q4 2024 | 11 | -2 | 5.01M | $775.92M | — | −2 |
| Q3 2024 | 12 | +2 | 3.69M | $488.77M | +2 | — |
| Q2 2024 | 10 | — | 3.74M | $494.68M | — | — |
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | GAMCO Investors ✦ | 1.36M | -2.0% | $180.37M | 1.8% | ▼ Trim | 2 | SEC ↗ |
| 2 | Wellington Management ✦ | 1.00M | -0.1% | $133.04M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 3 | Geode Capital Management ✦ (passive) | 849.60K | +1.5% | $112.55M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 4 | Norges Bank ✦ (passive) | 339.67K | -3.7% | $44.99M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 5 | Two Sigma Investments ✦ | 46.62K | -23.3% | $6.17M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 6 | T. Rowe Price ✦ | 23.99K | -5.1% | $3.18M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 7 | Citadel Advisors ✦ | 22.83K | -47.7% | $3.02M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 8 | D. E. Shaw & Co. ✦ | 19.70K | +29.8% | $2.61M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 9 | Millennium Management ✦ | 10.30K | New | $1.36M | 0.0% | New | 1 | SEC ↗ |
| 10 | AQR Capital Management ✦ | 5.22K | -12.1% | $690,991 | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 11 | Marshall Wace ✦ | 3.84K | New | $508,608 | 0.0% | New | 1 | SEC ↗ |
| 12 | Gotham Asset Management ✦ | 2.04K | -0.4% | $270,595 | 0.0% | ▼ Trim | 2 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Millennium Management | $1.36M | 0.0% |
| Marshall Wace | $508,608 | 0.0% |
Exited
| No tracked exits this quarter. |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 391 holders, 35.20M shares, $5.91B reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Officer · 300 sh · $53,852
Officer · 500 sh · $89,032
Officer · 1.70K sh · $301,107
Officer · 1.00K sh · $179,519
Officer · 1.90K sh · $342,759
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology