Insmed Incorporated (INSM) Insider Trading

Over the last 3 months, INSM insiders made 0 open-market buys and 33 sales, a net sale of -$34.2M (SEC Form 4). Over the last 6 months, 576 institutions increased and 399 reduced their position (13F).

Insider Activity

Sentiment
0/100
Buys (3m)
0
Sells (3m)
33
Net (3m)
-$34.2M
Insider trades by month Buys Sells
Dec
Jan
Feb
Mar
Apr
May
Context3-month price -30.7%Institutions accumulating (13F)
DateInsiderTypeSharesPrice
May 22, 2026Smith Michael Alexanderofficer: Chief Legal OfficerSell6,149$108.47
May 20, 2026Lewis Williamdirector, officer: Chair and CEOSell11,836$106.39
May 20, 2026Lewis Williamdirector, officer: Chair and CEOOption4,440$17.16
May 20, 2026Lewis Williamdirector, officer: Chair and CEOSell7,975$106.97
May 20, 2026Lewis Williamdirector, officer: Chair and CEOSell5,753$105.32
May 20, 2026Lewis Williamdirector, officer: Chair and CEOOption6,259$30.46
May 15, 2026Flammer Martina M.D.officer: Chief Medical OfficerSell10,479$117.54
May 15, 2026Lewis Williamdirector, officer: Chair and CEOSell13,283$116.18
May 15, 2026ANDERSON ELIZABETH MdirectorGrant3,305
May 15, 2026Bonstein Saraofficer: Chief Financial OfficerSell8,272$116.18
May 15, 2026Smith Michael Alexanderofficer: Chief Legal OfficerSell4,109$116.18
May 15, 2026LEE LEOdirectorGrant3,305
May 15, 2026Desjardins ClarissadirectorGrant3,305
May 15, 2026SHAROKY MELVIN MDdirectorGrant3,305
May 15, 2026Brennan David RdirectorGrant3,305
May 15, 2026SCHAFER CAROLdirectorGrant3,305
May 15, 2026Adsett Rogerofficer: Chief Operating OfficerSell5,837$116.18
May 15, 2026Flammer Martina M.D.officer: Chief Medical OfficerSell3,384$116.18
May 15, 2026Flammer Martina M.D.officer: Chief Medical OfficerSell4,470$112.76
May 13, 2026Flammer Martina M.D.officer: Chief Medical OfficerSell12,119$100.35
May 13, 2026Flammer Martina M.D.officer: Chief Medical OfficerOption12,949$17.07
May 13, 2026Flammer Martina M.D.officer: Chief Medical OfficerSell830$101.18
May 6, 2026Lewis Williamdirector, officer: Chair and CEOSell381$139.60
May 6, 2026Lewis Williamdirector, officer: Chair and CEOSell1,247$139.09
May 6, 2026Lewis Williamdirector, officer: Chair and CEOSell433$134.18
May 6, 2026Lewis Williamdirector, officer: Chair and CEOOption4,440$17.16
May 6, 2026Lewis Williamdirector, officer: Chair and CEOOption6,259$30.46
May 6, 2026Lewis Williamdirector, officer: Chair and CEOSell2,721$137.86
May 6, 2026Lewis Williamdirector, officer: Chair and CEOSell599$135.18
May 6, 2026Lewis Williamdirector, officer: Chair and CEOSell5,318$137.01

Source: INSM SEC Form 4 filings, latest May 22, 2026. For informational purposes only — not investment advice.

Institutional activity (13F)

How institutions changed their INSM positions over the last 6 months (SEC Form 13F).

Increased
576
New positions
269
Reduced
399
Sold out
177
Largest moves
InstitutionActionSharesFiled
JPMORGAN CHASE & COIncreased24.2MMay 13, 2026
JPMORGAN CHASE & COIncreased23.2MFeb 11, 2026
VANGUARD GROUP INCIncreased21.1MJan 29, 2026
DARWIN GLOBAL MANAGEMENT, LTD.Increased20.9MFeb 17, 2026
DARWIN GLOBAL MANAGEMENT, LTD.Reduced16.8MMay 15, 2026
BLACKROCK, INC.Increased16.7MMay 13, 2026
BLACKROCK, INC.Increased15.1MFeb 12, 2026
FMR LLCIncreased13.2MMay 15, 2026
VANGUARD PORTFOLIO MANAGEMENT LLCNew Position10.4MMay 8, 2026
FMR LLCIncreased9.9MFeb 17, 2026
VANGUARD CAPITAL MANAGEMENT LLCNew Position9.6MMay 15, 2026
BAKER BROS. ADVISORS LPIncreased7.4MMay 15, 2026
BAKER BROS. ADVISORS LPReduced6.6MFeb 17, 2026
ARTISAN PARTNERS LIMITED PARTNERSHIPIncreased6.5MMay 13, 2026
D. E. SHAW & CO., INC.Increased5.6MMay 15, 2026

Source: SEC Form 13F filings. For informational purposes only — not investment advice.