Insmed Inc
INSM · US
Insmed Inc is held by 5 of the 24 tracked investors in their latest 13F filings. The largest position is Norges Bank's at $360M, 0.04% of that portfolio. Versus the prior quarter, 3 added, 1 trimmed and 0 bought new. In the last 90 days insiders sold 1 times ($3.1M) and bought 0 times on the open market.
Big investors holding this stock
Latest 13F of the 24 tracked investors. Common shares only.
| Investor | Value ($) | vs prior quarter |
|---|---|---|
| Norges Bank weight 0.04% · Q2 2026 |
360M | ▲ 16% |
| Duquesne Family Office weight 2.92% · Q2 2026 |
152M | ▲ 23% |
| Bridgewater Associates weight 0.20% · Q2 2026 |
48.6M | ▲ 54% |
| Korea Investment Corporation weight 0.01% · Q2 2026 |
3.8M | – |
| National Pension Service (Korea) weight 0.00% · Q2 2026 |
2.8M | ▼ 91% |
Insider trades (90 days)
SEC Form 4| Insider | Trade | Amount ($) |
|---|---|---|
| Brennan David R Director · 9/9 |
Sell | 3.1M |
Questions
Which big investors own Insmed Inc?
Norges Bank ($360M), Duquesne Family Office ($152M), Bridgewater Associates ($48.6M), Korea Investment Corporation ($3.8M), National Pension Service (Korea) ($2.8M), per their latest 13F filings.
Does Warren Buffett own Insmed Inc?
Berkshire Hathaway did not report it in its latest 13F.
Does Korea's National Pension Service own Insmed Inc?
Yes, $2.8M as of 2026-06-30 (0.00% of its US holdings).
Have Insmed Inc insiders been selling?
1 open-market sales ($3.1M) and 0 purchases in the last 90 days; 0 of the sales were under pre-arranged 10b5-1 plans.
Restated and computed from SEC (13F, 13D/G, Form 4) and DART filings and NPS public data. Filings describe a past date and may differ from current holdings (13F: quarter end, up to 45 days later). Not investment advice.
Sources: SEC EDGAR, DART, data.go.kr (NPS), OpenFIGI. See Methodology for how figures are computed.