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Of the 11 tracked institutions holding OGN, 4 have a 3-year clone track record — 4 of them beat the S&P. Average holder's clone alpha: +4.0pt. It's a gauge of who owns the name, not just how many.
Among the 11 tracked institutional investors we monitor, OGN (ORGANON & CO) is held with a combined value of $981.42M across 90,671,348 shares. The largest holder is BlackRock, Inc. with a position worth $434.05M. Magnetar Financial LLC opened a new position in the most recent quarter. 4 funds increased their holdings. 6 funds reduced their position.
Total Institutional Value
$981.42M
Total Shares Held
90,671,348
Institutional Holders
11
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $434.05M | 0.01% | +1.1% |
| 2 | VANGUARD GROUP INC | $264.69M | 0.00% | +2.7% |
| 3 | STATE STREET CORP | $130.79M | 0.00% | -3.0% |
| 4 | MILLENNIUM MANAGEMENT LLC | $46.61M | 0.03% | -51.4% |
| 5 | Magnetar Financial LLC | $38.05M | 0.35% | New |
| 6 | AQR CAPITAL MANAGEMENT LLC | $16.82M | 0.01% | -63.9% |
| 7 | FMR LLC | $16.08M | 0.00% | -53.6% |
| 8 | Gotham Asset Management, LLC | $13.98M | 0.03% | -17.9% |
| 9 | TWO SIGMA ADVISERS, LP | $12.45M | 0.02% | +198.8% |
| 10 | CITADEL ADVISORS LLC | $4.66M | 0.00% | -82.8% |
| Member | Type | Date |
|---|---|---|
| Kevin Hern | Sell | Aug 5, 2026 |
| Gary C Peters | Sell | Jul 10, 2025 |
As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of OGN with a position worth $434.05M, representing 0.01% of their portfolio. In total, 11 institutional investors hold OGN with a combined value of $981.42M.
In the most recent quarter, 1 fund opened a new position in OGN. Additionally, 4 increased their holdings and 6 reduced their positions.
Institutional investors hold $981.42M worth of OGN stock across 11 positions. The largest institutional holder is BlackRock, Inc. with $434.05M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For OGN, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their OGN positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
| 2026-07-31 |
SEC Schedule 13D (activist) and 13G (passive) filings for OGN. Filed when an investor acquires 5%+ ownership.
Last Close
$13.75
2026-08-21
YTD
+89.9%
100% of 52-week range
