Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
568 institutional managers reported holding OSK for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 55%. 100 opened new positions; 78 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 7.56M | 11.95% | $1.11B | added +2.9% | ≤2013 |
| Vanguard Group | 7.56M | 11.94% | $1.11B | trimmed -2.8% | ≤2013 |
| Aristotle Capital Management, LLC | 5.00M | 7.90% | $735.8M | trimmed -7.1% | 2013 Q4 |
| Dimensional Fund Advisors | 3.05M | 4.82% | $448.9M | added +1.5% | ≤2013 |
| Greenhaven Associates INC (focused) | 2.53M | 4.00% | $372.3M | unchanged | 2022 Q3 |
| State Street | 2.10M | 3.32% | $308.8M | added +0.7% | ≤2013 |
| LSV Asset Management | 1.99M | 3.14% | $292.6M | added +3.9% | ≤2013 |
| FMR (Fidelity) | 1.98M | 3.12% | $290.8M | added +50.9% | ≤2013 |
| Invesco | 1.71M | 2.70% | $251.3M | trimmed -3.9% | ≤2013 |
| Capital Research Global Investors | 1.40M | 2.21% | $205.9M | added +17.3% | 2025 Q3 |
| AQR Capital | 1.36M | 2.15% | $200.7M | added +1.7% | ≤2013 |
| First Trust Advisors LP | 1.29M | 2.04% | $189.8M | added +6.3% | ≤2013 |
| Geode Capital | 1.27M | 2.01% | $187.2M | added +5.8% | ≤2013 |
| Bank OF America CORP /DE/ | 978.6k | 1.55% | $144.0M | added +0.9% | ≤2013 |
| Canada Life Assurance CO | 952.3k | 1.50% | $140.1M | added +2.1% | ≤2013 |
| Morgan Stanley | 868.7k | 1.37% | $127.8M | trimmed -6.6% | ≤2013 |
| AllianceBernstein | 809.6k | 1.28% | $119.1M | trimmed -15.6% | ≤2013 |
| Charles Schwab Investment Management | 700.2k | 1.11% | $103.0M | added +1.8% | ≤2013 |
| BNY Mellon | 629.6k | 0.99% | $92.6M | trimmed -1% | ≤2013 |
| Equity Investment CORP | 607.2k | 0.96% | $89.3M | trimmed -2.4% | 2022 Q2 |
| Northern Trust | 603.6k | 0.95% | $88.8M | added +1.1% | ≤2013 |
| American Century Companies INC | 579.0k | 0.92% | $85.2M | trimmed -35.9% | 2019 Q4 |
| Panagora Asset Management INC | 507.1k | 0.80% | $74.6M | trimmed -16.5% | ≤2013 |
| UBS | 507.1k | 0.80% | $74.6M | trimmed -27.4% | ≤2013 |
| Truist Financial CORP | 461.9k | 0.73% | $67.9M | added +15.7% | 2017 Q1 |
| Raymond James Financial INC | 445.4k | 0.70% | $65.5M | added +39.3% | 2016 Q1 |
| Pzena Investment Management | 438.9k | 0.69% | $64.6M | trimmed -14.6% | 2025 Q2 |
| SEI Investments CO | 404.2k | 0.64% | $59.5M | added +2.8% | 2014 Q3 |
| Thrivent Financial for Lutherans | 394.4k | 0.62% | $58.0M | trimmed -7.3% | 2025 Q3 |
| Franklin Resources | 382.3k | 0.60% | $56.2M | added +28.2% | 2023 Q3 |
| Lazard Asset Management LLC | 316.1k | 0.50% | $46.5M | added +644.7% | 2023 Q3 |
| Royal Bank OF Canada | 313.4k | 0.49% | $46.1M | trimmed -4.6% | ≤2013 |
| Capital International Investors | 300.0k | 0.47% | $44.1M | opened | 2026 Q1 |
| Goldman Sachs | 289.6k | 0.46% | $42.6M | trimmed -8.1% | ≤2013 |
| Victory Capital Management INC | 283.3k | 0.45% | $41.7M | trimmed -3.1% | 2017 Q1 |
| Bowen Hanes & CO INC | 277.4k | 0.44% | $40.8M | opened | 2026 Q1 |
| Envestnet Asset Management INC | 273.3k | 0.43% | $40.2M | added +15.9% | ≤2013 |
| Wasatch Advisors LP | 260.7k | 0.41% | $38.3M | trimmed -40.5% | 2025 Q1 |
| Bragg Financial Advisors, INC | 257.4k | 0.41% | $37.9M | unchanged | ≤2013 |
| Millennium Management | 250.7k | 0.40% | $36.9M | added +33.8% | 2014 Q4 |
| Lodge Hill Capital, LLC (focused) | 240.0k | 0.38% | $35.3M | added +860% | 2025 Q4 |
| Caisse de depot et placement du Quebec | 198.5k | 0.31% | $29.2M | added +8.9% | 2025 Q1 |
| Nomura Asset Management International INC. | 183.2k | 0.29% | $26.9M | trimmed -21.1% | 2025 Q4 |
| Rhumbline Advisers | 175.5k | 0.28% | $25.8M | added +1.1% | ≤2013 |
| Federation des caisses Desjardins du Quebec | 154.4k | 0.24% | $22.7M | trimmed -16.6% | 2020 Q1 |
| Allianz Asset Management GmbH | 145.1k | 0.23% | $21.4M | trimmed -75.5% | 2023 Q1 |
| Principal Financial Group INC | 141.2k | 0.22% | $20.8M | added +3.8% | ≤2013 |
| Cibc Bancorp USA INC. | 141.1k | 0.22% | $20.8M | trimmed -6.9% | 2020 Q4 |
| Atlantic Investment Management, INC. (focused) | 136.3k | 0.21% | $20.1M | trimmed -11.8% | 2024 Q4 |
| Skylands Capital, LLC | 134.4k | 0.21% | $19.8M | trimmed -3.4% | ≤2013 |
Largest 50 of 568 shown; the full ranked, searchable register is at boothcheck.com/holders/OSK. 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.