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 subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 32.1M | 14.5% |
| Pentwater Capital Management LP | 18.1M | 8.2% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 15.1M | 6.8% |
| 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% |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | 4.1M | 1.8% |
| 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 | 1.2% |
| KAHN BROTHERS GROUP INC | 2.7M | 1.2% |
| Bank of New York Mellon Corp | 2.3M | 1.0% |
| MORGAN STANLEY | 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 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM | Increased | 327.1K | 4.1M | +3.7M |
| 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 |
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.