Organon & Co.
OGN- Exchange
- NYSE
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001821825
No open-market purchases or sales by Organon & Co. insiders were filed in the last 90 days; 638 institutions reported holding it in 13F filings for Q2 2026, worth $2.92B in total; no superinvestor holds it.
Holders of 5% or more of OGN
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Organon & Co., largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 11.90%30.7M shares | – | Apr 30, 20251 filing | Apr 30, 2025 | SEC |
| Pentwater Capital Management LP | 13G | 6.90%18.1M shares | New | Aug 14, 20261 filing | Aug 14, 2026 | SEC |
| Vanguard Portfolio Management LLC | 13G/A | 5.77%15.2M shares | −2.70 ppfrom 8.47% | Apr 29, 20262 filings | Jul 31, 2026 | SEC |
| Vanguard Capital Management LLC | 13G | 5.26%13.7M shares | New | Apr 30, 20261 filing | Apr 30, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
19 Schedule 13D and 13G filings on Organon & Co., newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 14, 20264:21 PM ET | Pentwater Capital Management LPand 1 other | 13G | 6.90%18.1M shares | New | Jun 30, 2026 | SEC |
| Jul 31, 202611:22 AM ET | Vanguard Portfolio Management LLC | 13G/A | 5.77%15.2M shares | −2.70 ppfrom 8.47% | Jun 30, 2026 | SEC |
| Apr 30, 202611:59 AM ET | Vanguard Capital Management LLC | 13G | 5.26%13.7M shares | New | Mar 31, 2026 | SEC |
| Apr 29, 20262:41 PM ET | Vanguard Portfolio Management LLC | 13G | 8.47%22.1M shares | New | Mar 31, 2026 | SEC |
| Mar 27, 202611:04 AM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | −13.82 ppfrom 13.82%Below 5% | Mar 13, 2026 | SEC |
| Oct 30, 20253:48 PM ET | Vanguard Group Inc | 13G/A | 13.82%35.9M shares | – | Sep 30, 2025 | SEC |
| Apr 30, 202510:12 AM ET | BlackRock, Inc. | 13G/A | 11.90%30.7M shares | – | Mar 31, 2025 | SEC |
| Feb 13, 2024 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 5, 2024 | Mawer Investment Management Ltd. | 13G/AOld format | – | – | – | SEC |
| Jan 25, 2024 | State Street Corp | 13G/AOld format | – | – | – | SEC |
| Jan 23, 20244:13 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Nov 7, 20233:33 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 13, 2023 | Mawer Investment Management Ltd. | 13GOld format | – | New | – | SEC |
| Feb 10, 2023 | State Street Corp | 13GOld format | – | New | – | SEC |
| Feb 9, 2023 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 7, 20232:10 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2022 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 4, 20224:12 PM ET | BlackRock Inc. | 13GOld format | – | New | – | SEC |
| Jul 12, 2021 | Vanguard Group Inc | 13GOld format | – | New | – | SEC |
Form 144: proposed insider sales
2 notices from officers, directors and other affiliates planning to sell Organon & Co. shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| Aug 5, 20264:26 PM ET | Juliana P DrinaneOfficer | 14.8K | $200.3K | Aug 5, 2026 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| May 8, 20268:31 PM ET | Holzbaur LynetteAffiliate | 26.4K | $353.1K | May 6, 2026 | Morgan Stanley Global Stock Plan Services | SEC |