INSM
Insmed (INSM)
NASDAQ
$94.98-$0.09 (-0.09%)
Price as of Oct 22, 2026 7:49 PM EDT
  • $20.5B
    Market Cap
  • -40.63%
    1-Year Change
  • Biotechnology
    Industry

Top Holders

Institutional
Mutual Funds
Holder
Ownership %
Shares Held
Change (Shares, %)
Report Date
VANGUARD GROUP INC
9.65%
21.1M
+1.1M (+5.41%)
Dec 31, 2025
FMR LLC
7.39%
16.1M
+3.0M (+18.48%)
Jun 30, 2026
BLACKROCK FUNDING, INC. /DE
7.34%
16.0M
+1.1M (+6.63%)
Dec 31, 2024
BLACKROCK, INC.
7.24%
15.8M
-870,162 (-5.50%)
Jun 30, 2026
BLACKROCK INC.
6.53%
14.3M
+2.5M (+17.28%)
Jun 30, 2024
JPMORGAN CHASE & CO
4.78%
10.4M
-13.7M (-131.59%)
Jun 30, 2026
N/A
4.77%
10.4M
+36,160 (+0.35%)
Jun 30, 2026

Current Ownership Distribution

  • Institutions3.2B (64.18%)
  • Mutual Funds1.8B (35.68%)
  • Insiders6.9M (0.14%)
  • Other0 (0.00%)

Insider Transactions

  • 0.14% (6.9M)
    Current InsiderOwnership (%, shares)
  • 0
    Number of InsiderBuying (last 12 months)
  • $0.00
    Amount of InsiderBuying (last 12 months)
  • 10
    Number of InsiderSelling (last 12 months)
  • $3.1B
    Amount of InsiderSelling (last 12 months)
Insider Name & Title
Type
Date
Transaction Value
Shares
Share Price
Shares After Transactions
Koppikar Utpal
Award
Oct 19, 2026
$0.00
6,139
$0.00
6,139
Hudson Paul
Award
Oct 19, 2026
$0.00
6,139
$0.00
6,139
Brennan David R
Sell
Sep 09, 2026
$3.1M
25,000
$124.00
39,238
SHAROKY MELVIN MD
Sell
Aug 17, 2026
$637,650.00
5,000
$127.53
0
Adsett Roger
Chief Operating Officer
Exempt
Aug 10, 2026
$0.00
82,280
$0.00
0
Adsett Roger
Chief Operating Officer
Exempt
Aug 10, 2026
$0.00
76,600
$0.00
0
Adsett Roger
Chief Operating Officer
Exempt
Aug 10, 2026
$0.00
80,970
$0.00
0
Adsett Roger
Chief Operating Officer
Exempt
Aug 10, 2026
$1.1M
82,280
$13.67
181,024
Adsett Roger
Chief Operating Officer
Exempt
Aug 10, 2026
$1.3M
76,600
$17.16
257,624
Adsett Roger
Chief Operating Officer
Exempt
Aug 10, 2026
$2.5M
80,970
$30.46
338,594
Adsett Roger
Chief Operating Officer
Sell
Aug 10, 2026
$32.0M
239,850
$133.27
98,744
Flammer Martina M.D.
Chief Medical Officer
Exempt
Aug 06, 2026
$0.00
18,278
$0.00
36,555
Flammer Martina M.D.
Chief Medical Officer
Exempt
Aug 06, 2026
$0.00
8,895
$0.00
35,580
Flammer Martina M.D.
Chief Medical Officer
Exempt
Aug 06, 2026
$346,368.10
18,278
$18.95
78,764
Flammer Martina M.D.
Chief Medical Officer
Exempt
Aug 06, 2026
$229,757.85
8,895
$25.83
87,659
Flammer Martina M.D.
Chief Medical Officer
Sell
Aug 06, 2026
$1.1M
8,895
$127.00
78,764
Flammer Martina M.D.
Chief Medical Officer
Sell
Aug 06, 2026
$2.4M
18,278
$129.40
60,486
Lewis William
Chair and CEO
Exempt
Jul 23, 2026
$0.00
6,260
$0.00
0
Lewis William
Chair and CEO
Exempt
Jul 23, 2026
$0.00
4,440
$0.00
0
Lewis William
Chair and CEO
Exempt
Jul 23, 2026
$190,679.60
6,260
$30.46
265,318
Lewis William
Chair and CEO
Exempt
Jul 23, 2026
$76,190.40
4,440
$17.16
269,758
Lewis William
Chair and CEO
Sell
Jul 23, 2026
$509,933.36
4,828
$105.62
264,930
Lewis William
Chair and CEO
Sell
Jul 23, 2026
$624,956.96
5,872
$106.43
259,058
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