Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
250 institutional managers reported holding GBX for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 59%. 32 opened new positions; 40 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 5.09M | 16.05% | $268.3M | trimmed -6.4% | ≤2013 |
| Vanguard Group | 3.80M | 11.98% | $200.3M | trimmed -0.6% | ≤2013 |
| Dimensional Fund Advisors | 1.98M | 6.24% | $104.3M | added +0.7% | ≤2013 |
| Toronto Dominion Bank | 1.91M | 6.01% | $100.5M | added +2.6% | 2025 Q3 |
| American Century Companies INC | 1.52M | 4.80% | $80.2M | added +11.2% | 2020 Q3 |
| State Street | 1.18M | 3.73% | $62.3M | trimmed -1.8% | ≤2013 |
| Broad Bay Capital Management, LP (focused) | 801.8k | 2.53% | $42.2M | opened | 2026 Q1 |
| LSV Asset Management | 786.3k | 2.48% | $41.4M | unchanged | 2023 Q3 |
| Geode Capital | 745.9k | 2.35% | $39.3M | added +2.5% | ≤2013 |
| Mirae Asset Global Etfs Holdings LTD. | 745.8k | 2.35% | $39.3M | added +74.6% | 2018 Q3 |
| D. E. Shaw | 639.9k | 2.02% | $33.7M | added +16% | 2022 Q4 |
| Ameriprise Financial INC | 580.4k | 1.83% | $30.6M | unchanged | ≤2013 |
| Charles Schwab Investment Management | 578.9k | 1.82% | $30.5M | added +2.3% | ≤2013 |
| Victory Capital Management INC | 574.8k | 1.81% | $30.3M | trimmed -2.1% | 2015 Q1 |
| Morgan Stanley | 539.3k | 1.70% | $28.4M | added +10.9% | ≤2013 |
| Goldman Sachs | 487.2k | 1.53% | $25.7M | trimmed -36.1% | ≤2013 |
| Balyasny Asset Management | 417.5k | 1.32% | $22.0M | added +21.6% | 2022 Q1 |
| Hotchkis & Wiley Capital Management LLC | 399.9k | 1.26% | $21.1M | added +1.8% | 2017 Q4 |
| Deprince Race & Zollo INC | 385.8k | 1.22% | $20.3M | opened | 2026 Q1 |
| Northern Trust | 371.3k | 1.17% | $19.6M | added +4% | ≤2013 |
| BNY Mellon | 370.1k | 1.17% | $19.5M | trimmed -1.7% | ≤2013 |
| UBS | 359.4k | 1.13% | $18.9M | added +10% | ≤2013 |
| Congruence Capital, LLC (focused) | 289.0k | 0.91% | $15.2M | added +112.8% | 2025 Q4 |
| Qube Research & Technologies LTD | 261.4k | 0.82% | $13.8M | trimmed -45.1% | 2023 Q3 |
| Invesco | 250.0k | 0.79% | $13.2M | trimmed -3% | ≤2013 |
| Atlas FRM LLC (focused) | 249.6k | 0.79% | $13.1M | opened | 2026 Q1 |
| Tudor Investment | 232.2k | 0.73% | $12.2M | added +22.6% | 2024 Q4 |
| Barclays PLC | 230.2k | 0.72% | $12.1M | trimmed -46.4% | 2016 Q2 |
| Fisher Investments | 203.5k | 0.64% | $10.7M | trimmed -5% | 2022 Q4 |
| Bridgeway Capital Management, LLC | 190.7k | 0.60% | $10.0M | trimmed -4.1% | 2023 Q3 |
| Principal Financial Group INC | 150.1k | 0.47% | $7.9M | added +1.7% | 2013 Q4 |
| Dana Investment Advisors, INC. | 149.5k | 0.47% | $7.9M | unchanged | 2024 Q1 |
| Gamco Investors, INC. et al | 147.2k | 0.46% | $7.8M | trimmed -1.3% | 2023 Q1 |
| AQR Capital | 135.0k | 0.42% | $7.1M | trimmed -3.5% | 2020 Q3 |
| Jane Street | 132.4k | 0.42% | $7.0M | added +11.3% | 2019 Q2 |
| Denali Advisors LLC | 131.9k | 0.42% | $7.0M | added +494.3% | 2025 Q3 |
| Focus Partners Wealth | 122.6k | 0.39% | $6.5M | added +0.7% | 2025 Q4 |
| Empowered Funds, LLC | 115.7k | 0.36% | $6.1M | added +6.3% | 2023 Q3 |
| De Lisle Partners LLP | 112.3k | 0.35% | $5.9M | trimmed -3.8% | 2024 Q1 |
| Public Sector Pension Investment Board | 110.4k | 0.35% | $5.8M | added +3.2% | 2015 Q4 |
| Russell Investments Group, LTD. | 108.7k | 0.34% | $5.7M | added +3463.1% | 2016 Q4 |
| Bank OF America CORP /DE/ | 107.3k | 0.34% | $5.7M | added +26.1% | ≤2013 |
| Nuveen | 106.2k | 0.34% | $5.6M | trimmed -2.3% | 2019 Q2 |
| Franklin Resources | 97.2k | 0.31% | $5.1M | added +384.1% | 2018 Q2 |
| Vela Investment Management, LLC | 95.3k | 0.30% | $5.0M | added +2.8% | 2021 Q4 |
| GAMCO (Gabelli) | 92.2k | 0.29% | $4.9M | trimmed -2.5% | ≤2013 |
| First Trust Advisors LP | 91.1k | 0.29% | $4.8M | added +6.4% | 2023 Q1 |
| Rhumbline Advisers | 89.1k | 0.28% | $4.7M | added +1.2% | ≤2013 |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 83.4k | 0.26% | $4.4M | unchanged | 2024 Q4 |
| Community Bank of Raymore | 81.5k | 0.26% | $4.3M | trimmed -3.6% | 2014 Q4 |
Largest 50 of 250 shown; the full ranked, searchable register is at boothcheck.com/holders/GBX. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.