Organon & Co. (OGN) Ownership
OGN ownership summary
as of October 18, 2026- Institutions
- 84.6% of shares outstanding
- Insiders
- 0.46% of shares outstanding
- Shares outstanding
- 262.6M
- Float
- 243.0M shares available to trade
- Short interest
- 8.21% 19.0M shares short
- Days to cover
- 7.09 short interest up 13.6% vs prior month
- Institutions 84.60%
- Insiders 0.46%
- Other investors 14.94%
OGN top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 12.21% | 32.1M | $441.1M | +339,838 (+1.1%) | June 30, 2026 |
| 2 | Pentwater Capital Management LP | 6.89% | 18.1M | $249.1M | +18.1M (0.0%) | June 30, 2026 |
| 3 | Vanguard Portfolio Management, LLC | 5.76% | 15.1M | $208.2M | −6.7M (−30.7%) | June 30, 2026 |
| 4 | Vanguard Capital Management, LLC | 4.54% | 11.9M | $163.9M | +172,847 (+1.5%) | June 30, 2026 |
| 5 | State Street Corp | 3.68% | 9.7M | $132.9M | −297,403 (−3.0%) | June 30, 2026 |
| 6 | The Goldman Sachs Group Inc | 1.98% | 5.2M | $71.5M | +3.6M (+223.9%) | June 30, 2026 |
| 7 | UBS Group AG | 1.85% | 4.9M | $66.8M | +1.4M (+39.9%) | June 30, 2026 |
| 8 | Geode Capital Management, LLC | 1.83% | 4.8M | $66.3M | +56,273 (+1.2%) | June 30, 2026 |
| 9 | AllianceBernstein L.P. | 1.81% | 4.8M | $65.4M | +4.0M (+559.9%) | June 30, 2026 |
| 10 | Man Group PLC | 1.59% | 4.2M | $57.5M | +4.2M (0.0%) | June 30, 2026 |
| 11 | Cnh Partners, LLC | 1.48% | 3.9M | $53.4M | +3.9M (0.0%) | June 30, 2026 |
| 12 | Private Management Group Inc | 1.43% | 3.7M | $51.5M | −631,947 (−14.4%) | June 30, 2026 |
| 13 | LSV Asset Management | 1.42% | 3.7M | $51.4M | −3.5M (−48.5%) | June 30, 2026 |
| 14 | Charles Schwab Investment Management Inc | 1.32% | 3.5M | $47.6M | +94,913 (+2.8%) | June 30, 2026 |
| 15 | Millennium Management LLC | 1.31% | 3.4M | $47.4M | −3.3M (−49.2%) | June 30, 2026 |
| 16 | Dimensional Fund Advisors, Inc. | 1.24% | 3.3M | $45.0M | +1,546 (+0.0%) | June 30, 2026 |
| 17 | First Trust Advisors L.P. | 1.18% | 3.1M | $42.6M | −127,839 (−4.0%) | June 30, 2026 |
| 18 | Capula Management Ltd | 1.16% | 3.0M | $42.0M | +3.0M (0.0%) | June 30, 2026 |
| 19 | HIGHLAND CAPITAL MANAGEMENT FUND ADVISORS | 1.15% | 3.0M | $41.4M | +3.0M (0.0%) | June 30, 2026 |
| 20 | Magnetar Financial LLC | 1.07% | 2.8M | $38.7M | +2.8M (0.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 14 holders added 44.7M shares and 6 cut 14.6M.
OGN top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | iShares Core S&P Small-Cap ETF | 5.96% | 15.6M | $215.2M | +3,519 (+0.0%) | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 3.18% | 8.4M | $114.9M | −10,296 (−0.1%) | August 31, 2026 |
| 3 | Vanguard Small Cap Index | 2.30% | 6.0M | $83.1M | −1,267 (−0.0%) | August 31, 2026 |
| 4 | Vanguard MStar Small Cap Value Index | 1.46% | 3.8M | $52.8M | +2,908 (+0.1%) | August 31, 2026 |
| 5 | NexPoint Merger Arbitrage Z | 1.03% | 2.7M | $37.2M | +2.7M (0.0%) | June 30, 2026 |
| 6 | State Street SPDR Port S&P 600 Sm CpETF | 0.91% | 2.4M | $32.9M | — | September 30, 2026 |
| 7 | Man Event Driven Alternative IN USD | 0.87% | 2.3M | $31.5M | +137,826 (+6.4%) | June 30, 2026 |
| 8 | iShares S&P Small-Cap 600 Value ETF | 0.85% | 2.2M | $30.6M | — | September 30, 2026 |
| 9 | Vanguard Tax-Managed Small Cap Adm | 0.55% | 1.4M | $19.7M | — | August 31, 2026 |
| 10 | Schwab US Small-Cap ETF™ | 0.53% | 1.4M | $19.0M | +927 (+0.1%) | September 30, 2026 |
| 11 | State Street® SPDR® S&P 600™ Sm CpValETF | 0.53% | 1.4M | $19.0M | — | September 30, 2026 |
| 12 | Fidelity Extended Market Index | 0.49% | 1.3M | $17.6M | −17,278 (−1.3%) | August 31, 2026 |
| 13 | The Merger Fund A | 0.43% | 1.1M | $15.6M | +1.1M (0.0%) | June 30, 2026 |
| 14 | iShares Russell Mid-Cap ETF | 0.41% | 1.1M | $14.9M | +1,995 (+0.2%) | September 30, 2026 |
| 15 | Vanguard High Dividend Yield ETF | 0.40% | 1.1M | $14.6M | +5,031 (+0.5%) | August 31, 2026 |
| 16 | Fidelity SAI Merger Arbitrage | 0.39% | 1.0M | $14.2M | +252,360 (+32.4%) | August 31, 2026 |
| 17 | Fidelity Mid Cap Index | 0.38% | 995K | $13.7M | +3,428 (+0.3%) | August 31, 2026 |
| 18 | iShares US Pharmaceuticals ETF | 0.36% | 958K | $13.2M | +2,949 (+0.3%) | September 30, 2026 |
| 19 | Vanguard S&P Small-Cap 600 ETF | 0.36% | 945K | $13.0M | +4,721 (+0.5%) | August 31, 2026 |
| 20 | Schwab Fundamental U.S. Large CompanyETF | 0.35% | 928K | $12.8M | +1,007 (+0.1%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
OGN insider transactions
latest 6| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2025-05-06 | Daniel Karp | Buy | $8.24 | 3,500 | $28,840 |
| 2025-05-06 | Kirke Weaver | Buy | $9.21 | 8,045 | $74,094 |
| 2025-05-05 | Kevin Ali | Buy | $8.80 | 34,000 | $299,200 |
| 2025-05-05 | Kevin Ali | Buy | $8.80 | 34,000 | $299,200 |
| 2025-05-05 | Matthew M Walsh | Buy | $8.82 | 11,400 | $100,548 |
| 2025-05-05 | Matthew M Walsh | Buy | $8.82 | 11,400 | $100,548 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
OGN shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns OGN
Institutional investors own 84.6% of Organon's shares and insiders 0.46%. The largest holder is BlackRock Inc with 12.21% of the shares (32.1M), as of June 30, 2026. Among the top 20 institutions, 14 added shares and 6 reduced their stake in the latest filings. Short interest is 8.21% of the float, or 7.09 days of average trading volume. The share count rose 2.4% since 2019.
Related: OGN analyst forecast, OGN key metrics, OGN dividend history. See the OGN stock overview for the latest quote and news.
OGN ownership FAQ
Who owns the most Organon stock?
The largest shareholders of Organon are BlackRock Inc (12.21%), Pentwater Capital Management LP (6.89%), Vanguard Portfolio Management, LLC (5.76%), Vanguard Capital Management, LLC (4.54%), State Street Corp (3.68%).
What percentage of Organon is owned by institutions?
Institutions hold 84.6% of Organon's shares outstanding; insiders hold 0.46%.
Which funds own Organon?
The largest fund holders of Organon are iShares Core S&P Small-Cap ETF (5.96%), Vanguard MStar Total Stk Mkt Idx Invest (3.18%), Vanguard Small Cap Index (2.30%), Vanguard MStar Small Cap Value Index (1.46%), NexPoint Merger Arbitrage Z (1.03%).
What is Organon's short interest?
19.0M shares of Organon were sold short, 8.21% of the float; at the average daily volume it would take 7.09 days to cover.
Are insiders buying or selling Organon?
Of the latest 6 reported insider transactions in Organon (since May 5, 2025), 6 were purchases and 0 were sales.
How many shares of Organon are outstanding?
Organon has 262.6M shares outstanding, of which 243.0M are in the public float.