Insmed
INSM
101.74
-3.49
-3.32%
Insmed
US · INSM
#794 by market cap
Listed 1970
101.74
-3.49
-3.32%
Live - 5344 symbols - heartbeat 53s ago
· 2026-10-08 08:39
Pre-market
101.17
-0.56%
After-hours
103.00
+1.23%
Overnight
101.99
+0.25%
- Market cap
- 22.22B
- P/E (TTM)i
- -24.69
- P/Bi
- 29.33
- EPSi
- -6.42
- Div yieldi
- 0.00%
- 52W posi
- 9%
Reader sentiment
Are you bullish or bearish on INSM?
Anonymous reader poll. Unscientific, not investment advice.
✦ Quant Ownership Signal how this is computed
Distributing
- The number of reporting institutions decreased by 7 in the most recent period (2026/Q3).
- Total institutional ownership fell 0.2 percentage points.
Institutional ownership
- Held by institutions
- 103.81% -0.20pp
- Institutions
- 820 -7
- As of
- 2026/Q3 vs. prior period
Ownership vs. money flow
AlignedInstitutions trimmed shares last reporting period, and the stock has seen net outflows in main-fund flow over the last 20 trading sessions - the two line up.
Institutional ownership changes are reported quarterly with a lag; fund-flow data is daily. Treat this as a directional cross-check, not a precise timing signal.
Holder types
Mutual Fund71.50%
Hedge Fund24.27%
Public Company2.51%
Private Company1.58%
Sovereign Wealth Fund1.57%
Government Pension Fund1.03%
Family Office/Trust0.68%
Individual/Insider0.62%
VC/PE Fund0.43%
Top holders as of 2026-06-30
BlackRock
7.24% · 15.81M sh
FMR
7.00% · 15.28M sh
Vanguard Capital Management, LLC
5.13% · 11.19M sh
Vanguard Portfolio Management, LLC
4.77% · 10.41M sh
J.P. Morgan Asset Management, Inc.
4.05% · 8.84M sh
Baker Bros. Advisors LP
4.03% · 8.80M sh
Capital Research
3.77% · 8.24M sh
Darwin Global Management Limited
2.94% · 6.43M sh
Columbia Management Investment Advisers, LLC
2.83% · 6.18M sh
Orbis Investment Management Limited
2.78% · 6.08M sh
Bar length is relative to the largest holder shown here, not to 100% of the company.
Insiders
50 filings tracked · 10 buys · 40 sells
| Name | Role | Stake |
|---|---|---|
| William Lewis | Chairperson & CEO | 0.17% |
| Melvin Sharoky | Independent Director | 0.12% |
| David Brennan | Lead Independent Director | 0.04% |
| David W. McGirr | Independent Director | 0.04% |
| Clarissa Desjardins | Independent Director | 0.03% |
| Carol Schafer | Independent Director | 0.03% |
| Roger Adsett | Chief Operating Officer | 0.03% |
| Elizabeth Anderson | Independent Director | 0.03% |
| John Wise | Chief Commercial Officer | 0.03% |
| Alfred Altomari | Independent Director | 0.03% |
Insider transactions most recent Form 4 filings
| Date | Name | Role | Type | Shares | Price |
|---|---|---|---|---|---|
| 2026-09-08 | David Brennan | Lead Independent Director | Open Market Disposition | -25,000 | $124.00 |
| 2026-08-16 | Melvin Sharoky | Independent Director | Open Market Disposition | -5,000 | $127.53 |
| 2026-08-09 | Roger Adsett | Chief Operating Officer | Derivative Exercise and Sale | -239,850 | $13.67–133.27 |
| 2026-08-05 | Martina Flammer | Chief Medical Officer | Derivative Exercise and Sale | -27,173 | $18.95–129.40 |
| 2026-07-22 | William Lewis | Chairperson & CEO | Derivative Exercise and Sale | -10,700 | $17.16–106.43 |
| 2026-07-08 | William Lewis | Chairperson & CEO | Derivative Exercise and Sale | -10,699 | $17.16–118.52 |
| 2026-07-05 | Martina Flammer | Chief Medical Officer | Derivative Exercise and Sale | -12,302 | $19.74–110.60 |
| 2026-06-24 | William Lewis | Chairperson & CEO | Derivative Exercise and Sale | -21,398 | $17.16–106.27 |
| 2026-06-22 | Samuele Butera | Senior Vice President of Global Respiratory | Other Acquisition | +7,342 | -- |
| 2026-06-22 | Samuele Butera | Senior Vice President of Global Respiratory | Other Derivative Acquisition | +12,570 | $102.15 |
| 2026-06-21 | Michael Smith | Senior Vice President | Automatic Disposition | -1,806 | $95.82 |
| 2026-06-07 | William Lewis | Chairperson & CEO | Automatic Disposition | -6,515 | $94.03 |
| 2026-06-04 | Martina Flammer | Chief Medical Officer | Open Market Disposition | -4,424 | $102.27–103.78 |
| 2026-06-02 | William Lewis | Chairperson & CEO | Open Market Disposition | -7,605 | $102.27 |
| 2026-06-02 | Roger Adsett | Chief Operating Officer | Open Market Disposition | -2,370 | $102.27 |
| 2026-06-02 | Sara Bonstein | Chief Financial Officer | Open Market Disposition | -2,404 | $102.27 |
| 2026-06-02 | Michael Smith | Senior Vice President | Open Market Disposition | -2,159 | $102.27 |
| 2026-05-21 | Michael Smith | Senior Vice President | Automatic Disposition | -6,149 | $108.47 |
| 2026-05-17 | William Lewis | Chairperson & CEO | Automatic Disposition | -14,865 | $106.39–106.97 |
| 2026-05-17 | William Lewis | Chairperson & CEO | Derivative Exercise and Sale | -10,699 | $17.16–106.39 |
Form 4 filings, most recent per company. "Other Derivative Acquisition" rows are mostly RSU/option vesting, not open-market buying - the Type column says which.
Quote time 2026-10-08 08:39:12 · For reference only, not investment advice and not tailored to your situation.