OGN Organon & Co.
Organon & Co. (OGN) Institutional Ownership
What the institutions did with OGN last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeOwnership map
Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 32.1M | 14.7% |
| Pentwater Capital Management LP | 18.1M | 8.3% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 15.1M | 6.9% |
| VANGUARD CAPITAL MANAGEMENT LLC | 11.9M | 5.4% |
| STATE STREET CORP | 9.7M | 4.4% |
| GOLDMAN SACHS GROUP INC | 5.2M | 2.4% |
| UBS Group AG | 4.9M | 2.2% |
| GEODE CAPITAL MANAGEMENT, LLC | 4.8M | 2.2% |
| ALLIANCEBERNSTEIN L.P. | 4.8M | 2.2% |
| Man Group plc | 4.2M | 1.9% |
| AQR Arbitrage LLC | 3.9M | 1.8% |
| PRIVATE MANAGEMENT GROUP INC | 3.7M | 1.7% |
| LSV ASSET MANAGEMENT | 3.7M | 1.7% |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 3.5M | 1.6% |
| MILLENNIUM MANAGEMENT LLC | 3.4M | 1.6% |
| DIMENSIONAL FUND ADVISORS LP | 3.3M | 1.5% |
| FIRST TRUST ADVISORS LP | 3.1M | 1.4% |
| Capula Management Ltd | 3.0M | 1.4% |
| NEXPOINT ASSET MANAGEMENT, L.P. | 3.0M | 1.4% |
| Magnetar Financial LLC | 2.8M | 1.3% |
| GLAZER CAPITAL, LLC | 2.7M | 1.3% |
| KAHN BROTHERS GROUP INC | 2.7M | 1.2% |
| Bank of New York Mellon Corp | 2.3M | 1.0% |
| MORGAN STANLEY | 2.2M | 1.0% |
| Balyasny Asset Management L.P. | 2.2M | 1.0% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| Pentwater Capital Management LP | New | 0 | 18.1M | +18.1M |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Reduced | 21.8M | 15.1M | -6.7M |
| CANADA PENSION PLAN INVESTMENT BOARD | Sold Out | 5.0M | 0 | -5.0M |
| Man Group plc | New | 0 | 4.2M | +4.2M |
| ALLIANCEBERNSTEIN L.P. | Increased | 720.5K | 4.8M | +4.0M |
| Think Investments LP | Sold Out | 4.0M | 0 | -4.0M |
| AQR Arbitrage LLC | New | 0 | 3.9M | +3.9M |
| GOLDMAN SACHS GROUP INC | Increased | 1.6M | 5.2M | +3.6M |
| LSV ASSET MANAGEMENT | Reduced | 7.3M | 3.7M | -3.5M |
| MILLENNIUM MANAGEMENT LLC | Reduced | 6.8M | 3.4M | -3.3M |
| Capula Management Ltd | New | 0 | 3.0M | +3.0M |
| NEXPOINT ASSET MANAGEMENT, L.P. | New | 0 | 3.0M | +3.0M |
| TWO SIGMA INVESTMENTS, LP | Reduced | 3.1M | 241.4K | -2.9M |
| KAHN BROTHERS GROUP INC | Reduced | 5.5M | 2.7M | -2.9M |
| Magnetar Financial LLC | New | 0 | 2.8M | +2.8M |
| GLAZER CAPITAL, LLC | New | 0 | 2.7M | +2.7M |
| AQR CAPITAL MANAGEMENT LLC | Reduced | 3.5M | 1.2M | -2.2M |
| Kryger Capital LLC | New | 0 | 2.2M | +2.2M |
| Balyasny Asset Management L.P. | Increased | 217.9K | 2.2M | +2.0M |
| D. E. Shaw & Co., Inc. | Reduced | 2.6M | 718.8K | -1.9M |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | Sold Out | 1.7M | 0 | -1.7M |
| CITADEL ADVISORS LLC | Reduced | 2.0M | 344.4K | -1.7M |
| Westchester Capital Management, LLC | New | 0 | 1.4M | +1.4M |
| TIG Advisors, LLC | New | 0 | 1.4M | +1.4M |
| UBS Group AG | Increased | 3.5M | 4.9M | +1.4M |
| WATER ISLAND CAPITAL LLC | New | 0 | 1.4M | +1.4M |
| FMR LLC | Reduced | 2.6M | 1.2M | -1.4M |
| ALPINE ASSOCIATES MANAGEMENT INC. | New | 0 | 1.3M | +1.3M |
| Cerity Partners LLC | Reduced | 2.3M | 1.0M | -1.3M |
| MORGAN STANLEY | Reduced | 3.3M | 2.2M | -1.1M |
| HSBC HOLDINGS PLC | Increased | 22.4K | 1.1M | +1.1M |
| Allianz Asset Management GmbH | Increased | 1.1M | 2.1M | +1.0M |
| Mitsubishi UFJ Trust & Banking Corp | Reduced | 1.1M | 122.7K | -963.7K |
| GABELLI FUNDS LLC | New | 0 | 954.9K | +954.9K |
| Polar Asset Management Partners Inc. | New | 0 | 949.8K | +949.8K |
| Sio Capital Management, LLC | Sold Out | 865.9K | 0 | -865.9K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Reduced | 1.1M | 221.6K | -861.1K |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | New | 0 | 837.3K | +837.3K |
| M&G PLC | Reduced | 1.0M | 184.0K | -819.3K |
| Groupe la Francaise | New | 0 | 775.4K | +775.4K |
| TOKIO MARINE ASSET MANAGEMENT CO LTD | New | 0 | 704.1K | +704.1K |
| Sagefield Capital LP | New | 0 | 701.9K | +701.9K |
| P SCHOENFELD ASSET MANAGEMENT LP | New | 0 | 667.4K | +667.4K |
| Absolute Gestao de Investimentos Ltda. | New | 0 | 665.2K | +665.2K |
| HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | Reduced | 1.4M | 743.3K | -632.7K |
| PRIVATE MANAGEMENT GROUP INC | Reduced | 4.4M | 3.7M | -631.9K |
| Bridgewater Associates, LP | Sold Out | 594.5K | 0 | -594.5K |
| CREDIT INDUSTRIEL ET COMMERCIAL | New | 0 | 584.9K | +584.9K |
| Invesco Ltd. | Reduced | 2.2M | 1.6M | -583.5K |
| PICTON MAHONEY ASSET MANAGEMENT | Increased | 55 | 575.0K | +574.9K |
| Centiva Capital, LP | New | 0 | 554.8K | +554.8K |
| GABELLI & Co INVESTMENT ADVISERS, INC. | New | 0 | 548.7K | +548.7K |
| WINTON GROUP Ltd | New | 0 | 509.9K | +509.9K |
| New York Life Investment Management LLC | New | 0 | 503.1K | +503.1K |
| Verition Fund Management LLC | New | 0 | 498.0K | +498.0K |
| Y-Intercept (Hong Kong) Ltd | Sold Out | 476.5K | 0 | -476.5K |
| Alberta Investment Management Corp | New | 0 | 450.0K | +450.0K |
| Grantham, Mayo, Van Otterloo & Co. LLC | Sold Out | 448.9K | 0 | -448.9K |
| Carmignac Gestion | New | 0 | 448.6K | +448.6K |
| FIRST MANHATTAN CO. LLC. | Reduced | 950.2K | 504.6K | -445.5K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.