INSM
Insmed (INSM)
NASDAQ
$108.57-$0.58 (-0.53%)
Price as of Jul 13, 2026 7:46 PM EDT
  • $25.1B
    Market Cap
  • 7.12%
    1-Year Change
  • Biotechnology
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
JPMORGAN CHASE & CO
11.14%
24.2M
+950,987 (+3.94%)
Mar 31, 2026
VANGUARD GROUP INC
9.72%
21.1M
+1.1M (+5.41%)
Dec 31, 2025
DARWIN GLOBAL MANAGEMENT, LTD.
7.75%
16.8M
-4.1M (-24.56%)
Mar 31, 2026
BLACKROCK, INC.
7.69%
16.7M
+1.6M (+9.67%)
Mar 31, 2026
BLACKROCK FUNDING, INC. /DE
7.40%
16.0M
+1.1M (+6.63%)
Dec 31, 2024
BLACKROCK INC.
6.58%
14.3M
+2.5M (+17.28%)
Jun 30, 2024
FMR LLC
6.07%
13.2M
+3.2M (+24.56%)
Mar 31, 2026

Current Ownership Distribution

  • Institutions3.0B (64.84%)
  • Mutual Funds1.6B (35.01%)
  • Insiders7.0M (0.15%)
  • Other0 (0.00%)

Insider Transactions

  • 0.15% (7.0M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 9
    Number of InsiderSelling (last 12 months)
  • $3.6B
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Flammer Martina M.D.
Chief Medical Officer
Exempt
Jul 06, 2026
$0.00
7,945
$0.00
23,835
Flammer Martina M.D.
Chief Medical Officer
Exempt
Jul 06, 2026
$0.00
4,357
$0.00
4,358
Flammer Martina M.D.
Chief Medical Officer
Exempt
Jul 06, 2026
$231,437.85
7,945
$29.13
68,431
Flammer Martina M.D.
Chief Medical Officer
Exempt
Jul 06, 2026
$86,007.18
4,357
$19.74
72,788
Flammer Martina M.D.
Chief Medical Officer
Sell
Jul 06, 2026
$529,183.08
4,854
$109.02
67,934
Flammer Martina M.D.
Chief Medical Officer
Sell
Jul 06, 2026
$823,748.80
7,448
$110.60
60,486
Lewis William
Chair and CEO
Exempt
Jun 25, 2026
$0.00
12,518
$0.00
12,519
Lewis William
Chair and CEO
Exempt
Jun 25, 2026
$0.00
8,880
$0.00
8,880
Lewis William
Chair and CEO
Exempt
Jun 25, 2026
$381,298.28
12,518
$30.46
271,435
Lewis William
Chair and CEO
Exempt
Jun 25, 2026
$152,380.80
8,880
$17.16
280,315
Lewis William
Chair and CEO
Sell
Jun 25, 2026
$1.2M
12,091
$102.34
268,224
Lewis William
Chair and CEO
Sell
Jun 25, 2026
$189,291.60
1,836
$103.10
266,388
Lewis William
Chair and CEO
Sell
Jun 25, 2026
$388,234.44
3,723
$104.28
262,665
Lewis William
Chair and CEO
Sell
Jun 25, 2026
$258,543.12
2,456
$105.27
260,209
Lewis William
Chair and CEO
Sell
Jun 25, 2026
$137,300.84
1,292
$106.27
258,917
Butera Samuele
SVP, GM, Global Respiratory
Award
Jun 23, 2026
$0.00
12,570
$0.00
12,570
Butera Samuele
SVP, GM, Global Respiratory
Award
Jun 23, 2026
$0.00
7,342
$0.00
7,342
Lewis William
Chair and CEO
Sell
Jun 08, 2026
$612,605.45
6,515
$94.03
258,917
Adsett Roger
Chief Operating Officer
Exempt
Apr 01, 2026
$0.00
88,060
$0.00
0
Adsett Roger
Chief Operating Officer
Exempt
Apr 01, 2026
$1.3M
88,060
$14.56
194,870
Adsett Roger
Chief Operating Officer
Sell
Apr 01, 2026
$1.1M
6,715
$163.18
188,155
Adsett Roger
Chief Operating Officer
Sell
Apr 01, 2026
$3.1M
19,001
$164.11
169,154
Adsett Roger
Chief Operating Officer
Sell
Apr 01, 2026
$10.3M
62,344
$164.95
106,810
Smith Michael Alexander
Chief Legal Officer
Exempt
Mar 30, 2026
$0.00
5,649
$0.00
8,633
Smith Michael Alexander
Chief Legal Officer
Exempt
Mar 30, 2026
$0.00
13,989
$0.00
18,561
Smith Michael Alexander
Chief Legal Officer
Exempt
Mar 30, 2026
$96,428.43
5,649
$17.07
57,520
Smith Michael Alexander
Chief Legal Officer
Exempt
Mar 30, 2026
$390,153.21
13,989
$27.89
71,509
Smith Michael Alexander
Chief Legal Officer
Sell
Mar 30, 2026
$3.0M
19,638
$150.98
51,871
Lewis William
Chair and CEO
Exempt
Mar 19, 2026
$0.00
6,259
$0.00
50,073
Lewis William
Chair and CEO
Exempt
Mar 19, 2026
$0.00
4,440
$0.00
35,520