Who owns OGN?
Institutional ownership of Organon & Co. from Form 13F, Q2 2026
631 institutional managers reported holding Organon & Co. (OGN) in Form 13F filings for Q2 2026, with 218,661,556 shares worth $2.9B. The largest reported holder was BlackRock, Inc. Managers that filed both quarters added a net 18,939,232 shares (+9.5%). 111 opened new positions and 89 sold out.
- Funds holding
- 631
- Value held
- $2.9B
- New / sold out
- 111 / 89
- Net shares, same filers
- +9.5%
Holdings as of June 30, 2026, the end of Q2 2026. Managers have 45 days after a quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
Largest holders of OGN
| Fund | Value | Share of 13F holdings | Shares | Move |
|---|---|---|---|---|
| BlackRock, Inc. | $434M | 14.7% | 32,056,866 | Added |
| Pentwater Capital Management LP | $245M | 8.3% | 18,100,000 | New |
| Vanguard Portfolio Management LLC | $205M | 6.9% | 15,132,118 | Trimmed |
| Vanguard Capital Management LLC | $161M | 5.4% | 11,909,865 | Added |
| State Street Corp | $131M | 4.4% | 9,659,371 | Trimmed |
| Goldman Sachs Group Inc | $70.4M | 2.4% | 5,199,002 | Added |
| UBS Group AG | $65.8M | 2.2% | 4,856,529 | Added |
| Geode Capital Management, LLC | $65.2M | 2.2% | 4,815,610 | Added |
| Man Group plc | $56.6M | 1.9% | 4,180,500 | New |
| AQR Arbitrage LLC | $52.4M | 1.8% | 3,880,354 | New |
| Private Management Group Inc | $50.7M | 1.7% | 3,742,161 | Trimmed |
| LSV Asset Management | $50.6M | 1.7% | 3,737,036 | Trimmed |
| Charles Schwab Investment Management Inc | $46.8M | 1.6% | 3,457,262 | Added |
| Millennium Management LLC | $46.6M | 1.6% | 3,442,430 | Trimmed |
| Dimensional Fund Advisors LP | $44.2M | 1.5% | 3,266,826 | Unchanged |
| First Trust Advisors LP | $42.0M | 1.4% | 3,099,481 | Trimmed |
| Capula Management Ltd | $41.3M | 1.4% | 3,049,207 | New |
| Nexpoint Asset Management, L.p. | $40.8M | 1.4% | 3,009,630 | New |
| Magnetar Financial LLC | $38.0M | 1.3% | 2,810,019 | New |
| Glazer Capital, LLC | $37.2M | 1.3% | 2,745,000 | New |
| Kahn Brothers Group Inc | $36.2M | 1.2% | 2,670,523 | Trimmed |
| Bank of New York Mellon Corp | $30.9M | 1.0% | 2,282,161 | Added |
| Morgan Stanley | $29.8M | 1.0% | 2,202,199 | Trimmed |
| Balyasny Asset Management L.P. | $29.7M | 1.0% | 2,196,642 | Added |
| Kryger Capital LLC | $29.1M | 1.0% | 2,152,693 | New |
Share of 13F holdings is each fund's shares as a share of the 218,661,556 OGN shares all 13F filers reported, not of shares outstanding.
Biggest buyers in Q2 2026
- Pentwater Capital Management LP New+$245M
- Man Group plc New+$56.6M
- AQR Arbitrage LLC New+$52.4M
- Goldman Sachs Group Inc Added+$48.7M
- Capula Management Ltd New+$41.3M
- Nexpoint Asset Management, L.p. New+$40.8M
- Magnetar Financial LLC New+$38.0M
- Glazer Capital, LLC New+$37.2M
- Kryger Capital LLC New+$29.1M
- Balyasny Asset Management L.P. Added+$26.8M
Biggest sellers in Q2 2026
- Vanguard Portfolio Management LLC Trimmed-$90.9M
- LSV Asset Management Trimmed-$47.7M
- Millennium Management LLC Trimmed-$45.2M
- Two Sigma Investments, LP Trimmed-$39.2M
- Kahn Brothers Group Inc Trimmed-$38.8M
- Canada Pension Plan Investment Board Sold out-$30.0M
- AQR Capital Management LLC Trimmed-$29.8M
- D. E. Shaw & Co., Inc. Trimmed-$26.1M
- Think Investments LP Sold out-$24.0M
- Citadel Advisors LLC Trimmed-$22.4M
The change in shares since the quarter before, adjusted for stock splits and priced at the Q2 2026 value per share. Funds bought $1.0B and sold $648M; 116 added and 187 trimmed.
Schedule 13D and 13G filings on OGN
Owners of more than 5% must file within days, so these can be newer than the 13F data.
- 2026-08-14Pentwater Capital Management LP SCHEDULE 13G filed by Organon & Co.Schedule 13G
- 2026-04-30VANGUARD CAPITAL MANAGEMENT LLC SCHEDULE 13G filed by Organon & Co.Schedule 13G
Questions about OGN ownership
- Who owns OGN stock?
- 631 institutional investment managers reported OGN positions in their Form 13F filings for Q2 2026, holding 218,661,556 shares worth $2.9B in total. BlackRock, Inc. reported the largest position.
- Are funds buying or selling OGN?
- In Q2 2026, 111 managers opened new OGN positions, 116 added, 187 trimmed and 89 sold out. Managers that filed in both quarters added a net 18,939,232 shares.
- How current is this OGN institutional ownership data?
- It covers holdings as of the end of Q2 2026. Managers have 45 days after the quarter ends to file Form 13F (by August 14, 2026 for Q2 2026), so positions may have changed since.
From the SEC's Form 13F data sets for Q2 2026: every 13F holdings report, matched to OGN by CUSIP. Options are left out. OGN news and filings · OGN insider trades · Top funds