Organon & Co (OGN)
Who owns Organon & Co (OGN)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.4% of the shares are freely tradable; institutional investors hold 77.9%.
Ownership Structure
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard Group Inc | 14.06 | 36,916,382 | +2.7 | 12/31/2025 |
| BlackRock Inc | 12.08 | 31,717,028 | +2.4 | 03/31/2026 |
| Vanguard Portfolio Management, LLC | 8.32 | 21,846,036 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.47 | 11,737,018 | +0.0 | 03/31/2026 |
| State Street Corp | 3.79 | 9,956,774 | +3.7 | 03/31/2026 |
| LSV Asset Management | 2.76 | 7,259,730 | -2.8 | 03/31/2026 |
| Millennium Management LLC | 2.58 | 6,781,535 | +1,371.2 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Small-Cap ETF | 6.00 | 15,767,421 | +0.0 | 05/29/2026 |
| Vanguard Total Stock Mkt Idx Inv | 3.17 | 8,316,998 | +0.3 | 04/30/2026 |
| Vanguard Small Cap Index | 2.28 | 5,997,205 | -0.1 | 04/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.