Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
589 institutional managers reported holding OGN for the quarter ended Mar 31, 2026. Together they hold about 76% of shares outstanding; the top 10 hold 44%. 74 opened new positions; 109 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 35.81M | 13.62% | $214.1M | trimmed -3.1% | 2021 Q2 |
| BlackRock | 31.72M | 12.06% | $189.7M | added +2.4% | 2021 Q2 |
| State Street | 9.96M | 3.79% | $59.5M | added +3.7% | 2021 Q2 |
| LSV Asset Management | 7.26M | 2.76% | $43.4M | trimmed -2.8% | 2021 Q2 |
| Millennium Management | 6.78M | 2.58% | $40.6M | added +1371.2% | 2021 Q2 |
| Kahn Brothers Group INC (focused) | 5.54M | 2.11% | $33.1M | added +52.6% | 2021 Q2 |
| CPP Investment Board | 5.01M | 1.91% | $30.0M | added +106.2% | 2021 Q2 |
| Geode Capital | 4.76M | 1.81% | $28.5M | added +3.5% | 2021 Q2 |
| Private Management Group INC | 4.37M | 1.66% | $26.2M | added +0.6% | 2021 Q2 |
| UBS | 4.25M | 1.62% | $25.4M | trimmed -16.6% | 2021 Q2 |
| Think Investments LP (focused) | 4.00M | 1.52% | $23.9M | opened | 2026 Q1 |
| AQR Capital | 3.45M | 1.31% | $20.6M | trimmed -59.7% | 2021 Q2 |
| Charles Schwab Investment Management | 3.36M | 1.28% | $20.1M | added +15.7% | 2021 Q2 |
| Morgan Stanley | 3.29M | 1.25% | $19.7M | added +3.6% | 2021 Q2 |
| Dimensional Fund Advisors | 3.27M | 1.24% | $19.5M | trimmed -3.5% | 2021 Q2 |
| First Trust Advisors LP | 3.23M | 1.23% | $19.3M | added +78.1% | 2021 Q4 |
| Two Sigma | 3.14M | 1.19% | $18.8M | added +44.5% | 2025 Q2 |
| D. E. Shaw | 2.64M | 1.01% | $15.8M | trimmed -21.9% | 2025 Q3 |
| FMR (Fidelity) | 2.56M | 0.97% | $15.3M | added +7142.9% | 2021 Q2 |
| Cerity Partners LLC | 2.31M | 0.88% | $13.8M | added +111.5% | 2023 Q4 |
| BNY Mellon | 2.23M | 0.85% | $13.3M | trimmed -1.3% | 2021 Q2 |
| Invesco | 2.23M | 0.85% | $13.3M | unchanged | 2021 Q2 |
| Citadel Advisors | 2.00M | 0.76% | $12.0M | trimmed -3.1% | 2021 Q2 |
| Northern Trust | 1.91M | 0.73% | $11.4M | added +5.1% | 2021 Q2 |
| MFS Investment Management | 1.69M | 0.64% | $10.1M | trimmed -75.5% | 2021 Q2 |
| Goldman Sachs | 1.61M | 0.61% | $9.6M | trimmed -14.6% | 2021 Q2 |
| Hotchkis & Wiley Capital Management LLC | 1.38M | 0.52% | $8.2M | opened | 2026 Q1 |
| Principal Financial Group INC | 1.26M | 0.48% | $7.5M | added +2.1% | 2021 Q2 |
| Gotham Asset Management | 1.26M | 0.48% | $7.5M | trimmed -52.6% | 2021 Q2 |
| Susquehanna International Group | 1.25M | 0.47% | $7.4M | added +375.3% | 2021 Q2 |
| Mitsubishi UFJ Asset Management CO., LTD. | 1.09M | 0.41% | $6.5M | trimmed -11.5% | 2021 Q2 |
| Allianz Asset Management GmbH | 1.08M | 0.41% | $6.5M | trimmed -7.8% | 2021 Q2 |
| M&G PLC | 1.00M | 0.38% | $6.0M | added +1.1% | 2021 Q2 |
| First Manhattan CO. LLC. | 950.2k | 0.36% | $5.7M | added +9124.1% | 2021 Q2 |
| Marshall Wace | 933.2k | 0.35% | $5.6M | added +112.1% | 2024 Q3 |
| Public Sector Pension Investment Board | 930.1k | 0.35% | $5.6M | added +3.2% | 2021 Q2 |
| Sio Capital Management, LLC | 865.9k | 0.33% | $5.2M | trimmed -74.7% | 2025 Q4 |
| Squarepoint Ops LLC | 831.4k | 0.32% | $5.0M | added +130.4% | 2021 Q2 |
| Ameriprise Financial INC | 754.2k | 0.29% | $4.5M | added +19.6% | 2021 Q2 |
| Bank OF America CORP /DE/ | 738.5k | 0.28% | $4.4M | trimmed -58.5% | 2021 Q2 |
| AllianceBernstein | 720.5k | 0.27% | $4.3M | added +450.5% | 2021 Q2 |
| Wells Fargo & COMPANY/MN | 700.6k | 0.27% | $4.2M | trimmed -23.1% | 2021 Q2 |
| Brandes Investment Partners, LP | 691.6k | 0.26% | $4.1M | added +14% | 2023 Q4 |
| Legal & General Group PLC | 678.0k | 0.26% | $4.1M | trimmed -13% | 2021 Q2 |
| Citigroup INC | 596.8k | 0.23% | $3.6M | added +17.9% | 2021 Q2 |
| Bridgewater Associates | 594.5k | 0.23% | $3.6M | trimmed -34.6% | 2024 Q3 |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 523.5k | 0.20% | $3.1M | unchanged | 2024 Q4 |
| Douglas Lane & Associates, LLC | 522.6k | 0.20% | $3.1M | added +7.6% | 2021 Q2 |
| Swiss National Bank | 512.6k | 0.20% | $3.1M | unchanged | 2021 Q2 |
| Rhumbline Advisers | 491.4k | 0.19% | $2.9M | added +4.4% | 2021 Q2 |
Largest 50 of 589 shown; the full ranked, searchable register is at boothcheck.com/holders/OGN. 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.