AI summary pending
View Full Filing (SEC EDGAR)Insmed Inc
$103.83-6.6%
+$4.5B
Net Activity
+20.73% total shares
Institutions Holding
671
Popularity Rank
#825
Avg Weight
0.28%
Total Value
$25.1B
Market Cap
$20.7B
671 institutions currently hold INSM, with 371 net buyers and 360 net sellers this quarter.
Institutional Moves (Q2 2026)
Neutral
Based on recent trading activity
Net Selling Institutions
360
Net Buying Institutions
371
Top 5 by Value
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Across its top 20 institutional holders, INSM's holder base skews toward low-concentration, low-turnover investors on average (avg. concentration score 12/100, avg. turnover score 43/100).
INSM ranks #825 out of 37696 tracked stocks by institutional interest — one of the most closely watched names in our coverage.
INSM is a top-conviction position for Darwin Global Management, Ltd. — at 17.9% of their entire disclosed 13F portfolio, it's one of their largest single bets, not just a passing allocation.
The largest dollar stake in INSM belongs to FMR LLC, but the position matters far more to Darwin Global Management, Ltd., who has 17.9% of their own portfolio riding on it — a reminder that the biggest holder by size and the holder with the biggest bet aren't always the same fund.
Assenagon Asset Management S.A. has added to its INSM position for two straight quarters, increasing it by $134.2M to reach $144.6M today.
Concurrent Investment Advisors, LLC has trimmed its INSM position for two straight quarters, cutting it by $597.0K while still holding $243.7K.
INSM is down 6.6% today, but institutions show net buying of $4.5B this quarter — a divergence between today's price move and the underlying institutional flow.
INSM reported a net loss of $875.3M over the trailing twelve months.
+$6.1B
Total Buy Value
$5.0B
Total Sell Value
371
Net Buyers
360
Net Sellers
INSM
Q2 2026
Top 5 Institutional Movers
INSM does not currently have enough recent insider (Form 4) trading activity to compute a convergence signal against its 13F institutional flows.
13F data as of 2026-09-30 quarterly filings. Note: many large institutions file close to the 45-day post-quarter deadline, so early-quarter flow figures can shift substantially as more filings arrive.
5
Filings (90d)
$40.33M
Total Est. Value
308K shares
Planned Shares
| Filer | Filing Date | Est. Value |
|---|---|---|
| Brennan David R | 2026-09-10 | $3.10M |
| MELVIN SHAROKY | 2026-08-17 | $638K |
| Roger Adsett | 2026-08-10 | $31.96M |
| Martina Flammer | 2026-08-06 | $3.49M |
| William Lewis | 2026-07-23 | $1.13M |
Form 144 is a planned sale notice, not an executed transaction. Form 144 Tracker。
1
Active 5%+ Holders
| Reporting Person | Type | Filing Date | % of Class |
|---|---|---|---|
| Darwin Global Management, Ltd. | 13G/A | 2026-08-14 | 3.0% |
| FMR LLC | 13G/A | 2026-08-06 | 7.4% |
| JPMORGAN CHASE & CO. | 13G/A | 2026-07-22 | 4.7% |
2
Filings (14d)
AI summary pending
View Full Filing (SEC EDGAR)AI summary pending
View Full Filing (SEC EDGAR)457669307
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Access INSM's institutional ownership data programmatically:
REST API
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