Organon & Co. (OGN) ownership: Top institutional holder: VANGUARD GROUP INC ($264.69M). Insider activity: Net Seller (1 buys, 19 sells). 2 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 36916382.00 | $264.69M | 2025-12-31 |
| BlackRock, Inc. | 31717028.00 | $189.98M | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 21846036.00 | $130.86M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 11737018.00 | $70.30M | 2026-03-31 |
| STATE STREET CORP | 9956774.00 | $59.64M | 2026-03-31 |
| LSV ASSET MANAGEMENT | 7259730.00 | $43.49M | 2026-03-31 |
| MILLENNIUM MANAGEMENT LLC | 6781535.00 | $40.62M | 2026-03-31 |
| KAHN BROTHERS GROUP INC | 5536993.00 | $33.17M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-06-12 | |
| Sell | null | 2026-06-12 | |
| Sell | null | 2026-06-12 | |
| Sell | null | 2026-06-12 | |
| Sell | null | 2026-06-12 | |
| Sell | null | 2026-06-12 | |
| Sell | null | 2026-06-12 | |
| Sell | null | 2026-06-12 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.