INSMED Inc
INSM- Exchange
- Nasdaq
- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001104506
In the last 90 days, INSMED Inc insiders filed 0 open-market purchases and 7 sales; 667 institutions reported holding it in 13F filings for Q2 2026, worth $23.8B in total; superinvestors Maverick Capital and Duquesne Family Office hold it.
Holders of 5% or more of INSM
Holders whose latest Schedule 13D or 13G filing reports 5% or more of INSMED Inc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| JPMorgan Chase & Co | 13G/A | 10.80%23.0M shares | +2.90 ppfrom 7.90% | Jul 30, 20252 filings | Sep 4, 2025 | SEC |
| Darwin Global Management, Ltd. | 13G/A | 9.70%20.5M shares | +1.20 ppfrom 8.50% | Feb 14, 20253 filings | Nov 14, 2025 | SEC |
| BlackRock, Inc. | 13G/A | 6.60%14.1M shares | +1.50 ppfrom 5.10% | Jul 17, 20252 filings | Jan 21, 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
11 Schedule 13D and 13G filings on INSMED Inc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 27, 20269:52 AM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | −10.18 ppfrom 10.18%Below 5% | Mar 13, 2026 | SEC |
| Jan 21, 202612:30 PM ET | BlackRock, Inc. | 13G/A | 6.60%14.1M shares | +1.50 ppfrom 5.10% | Dec 31, 2025 | SEC |
| Nov 14, 20254:30 PM ET | Darwin Global Management, Ltd.and 2 others | 13G/A | 9.70%20.5M shares | +1.20 ppfrom 8.50% | Sep 30, 2025 | SEC |
| Nov 14, 202512:19 PM ET | Price T Rowe Associates Inc | 13G/A | 3.30%6.93M shares | −2.60 ppfrom 5.90%Below 5% | Sep 30, 2025 | SEC |
| Sep 4, 20251:41 PM ET | JPMorgan Chase & Co | 13G/A | 10.80%23.0M shares | +2.90 ppfrom 7.90% | Aug 29, 2025 | SEC |
| Aug 14, 20251:07 PM ET | Price T Rowe Associates Inc | 13G/A | 5.90%11.2M shares | – | Jun 30, 2025 | SEC |
| Jul 30, 20251:19 PM ET | JPMorgan Chase & Co | 13G | 7.90%15.2M shares | New | Jun 30, 2025 | SEC |
| Jul 17, 20258:12 PM ET | BlackRock, Inc. | 13G/A | 5.10%9.73M shares | – | Jun 30, 2025 | SEC |
| May 15, 20254:30 PM ET | Darwin Global Management, Ltd.and 2 others | 13G/A | 8.50%15.4M shares | +1.30 ppfrom 7.20% | Mar 31, 2025 | SEC |
| Feb 14, 20254:10 PM ET | Darwin Global Management, Ltd.and 2 others | 13G/A | 7.20%13.0M shares | – | Dec 31, 2024 | SEC |
| Jan 8, 20259:54 AM ET | Vanguard Group Inc | 13G/A | 10.18%18.2M shares | – | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell INSMED Inc shares.
No Form 144 notices for INSMED Inc are on file.