InsiderFlow

Insmed Incorporated

$139.06-0.46 (-0.33%)

Prev Close

$139.52

Open

$140.66

High

$141.78

Low

$138.01

Volume

852.5K

Market Cap

$30.07B

P/E

Div Yield

Over the past 12 months, insider activity at Insmed Incorporated (INSM) has been dominated by selling, with 1 insider purchase totaling $201.7K and 90 insider sales totaling $244.03M. The most recent insider transaction was by Lewis William (director, officer: Chair and CEO), who sold $3.12M worth of shares on Mar 5, 2026. Insmed Incorporated operates in the Healthcare sector, within the Biotechnology industry, with a market cap of $30.07B.

Buys (12M)

1

$201.7K

Sells (12M)

90

$244.03M

Net Activity

Net Seller

$243.83M

Active Insiders

11

last 12 mo

INSM Price Chart

INSM Insider Trading Activity

DateInsiderRoleTypeSharesAvg PriceValueShares After
Mar 5, 2026Lewis Williamdirector, officer: Chair and CEOSell21,398$146.03$3.12M309,801
Feb 25, 2026Smith Michael Alexanderofficer: Chief Legal OfficerSell24,774$155.77$3.86M71,793
Feb 23, 2026Lewis Williamdirector, officer: Chair and CEOSell10,699$150.97$1.62M309,896
Feb 19, 2026Lewis WilliamChair and CEOSell10,699$150.97$1.62M0
Feb 11, 2026Lewis Williamdirector, officer: Chair and CEOSell13,396$147.79$1.98M309,693
Feb 9, 2026Lewis WilliamChair and CEOSell13,396$147.79$1.98M0
Feb 6, 2026Flammer Martina M.D.officer: Chief Medical OfficerSell869$152.44$132.5K83,243
Feb 5, 2026Flammer Martina M.D.Chief Medical OfficerSell869$152.44$132.5K0
Feb 4, 2026Adsett Rogerofficer: Chief Operating OfficerSell791$156.17$123.5K106,810
Feb 4, 2026Bonstein Saraofficer: Chief Financial OfficerSell748$156.34$116.9K79,758
Feb 4, 2026Flammer Martina M.D.officer: Chief Medical OfficerSell8,777$154.70$1.36M92,326
Feb 4, 2026Lewis Williamdirector, officer: Chair and CEOSell3,009$156.34$470.4K303,882
Feb 4, 2026Smith Michael Alexanderofficer: Chief Legal OfficerSell640$156.27$100.0K56,397
Feb 3, 2026Adsett RogerChief Operating OfficerSell791$156.17$123.5K0
Feb 3, 2026Bonstein SaraChief Financial OfficerSell748$156.34$116.9K0
Feb 3, 2026Lewis WilliamChair and CEOSell3,009$156.34$470.4K0
Feb 3, 2026Smith Michael AlexanderChief Legal OfficerSell640$156.27$100.0K0
Feb 2, 2026Flammer Martina M.D.Chief Medical OfficerSell8,777$154.70$1.36M0
Jan 22, 2026Lewis Williamdirector, officer: Chair and CEOSell10,699$158.93$1.70M316,584
Jan 20, 2026Lewis WilliamChair and CEOSell10,699$158.93$1.70M0
Jan 13, 2026Flammer Martina M.D.officer: Chief Medical OfficerSell1,887$186.19$351.3K84,907
Jan 13, 2026Lewis Williamdirector, officer: Chair and CEOSell18,918$168.95$3.20M322,132
Jan 12, 2026Lewis WilliamChair and CEOSell19,215$169.00$3.25M0
Jan 9, 2026Flammer Martina M.D.Chief Medical OfficerSell1,887$186.19$351.3K0
Jan 8, 2026Adsett Rogerofficer: Chief Operating OfficerSell4,290$174.06$746.7K110,462
Jan 8, 2026Bonstein Saraofficer: Chief Financial OfficerSell4,642$174.22$808.7K83,631
Jan 8, 2026Flammer Martina M.D.officer: Chief Medical OfficerSell16,530$174.06$2.88M98,541
Jan 8, 2026Lewis Williamdirector, officer: Chair and CEOSell9,676$174.03$1.68M320,987
Jan 8, 2026Smith Michael Alexanderofficer: Chief Legal OfficerSell3,158$174.00$549.5K58,799
Jan 6, 2026Adsett RogerChief Operating OfficerSell4,290$174.06$746.7K0
Jan 6, 2026Bonstein SaraChief Financial OfficerSell4,642$174.22$808.7K0
Jan 6, 2026Flammer Martina M.D.officer: Chief Medical OfficerSell28,833$172.91$4.99M104,258
Jan 6, 2026Lewis WilliamChair and CEOSell9,676$174.03$1.68M0
Jan 6, 2026Schaeffer Orlov S Nicoleofficer: Chief People Strategy OfficerSell87,290$175.20$15.29M98,014
Jan 6, 2026Smith Michael AlexanderChief Legal OfficerSell3,158$174.00$549.5K0
Jan 2, 2026Flammer Martina M.D.Chief Medical OfficerSell12,303$171.38$2.11M0
Jan 2, 2026Schaeffer Orlov S NicoleChief People Strategy OfficerSell87,290$175.20$15.29M0
Dec 18, 2025Lewis WilliamChair and CEOSell10,699$166.97$1.79M0
Dec 5, 2025SHAROKY MELVIN MDDirectorSell20,000$205.01$4.10M0
Dec 4, 2025Lewis WilliamChair and CEOSell10,699$205.62$2.20M0
Dec 1, 2025Flammer Martina M.D.Chief Medical OfficerSell8,895$206.98$1.84M0
Nov 24, 2025ANDERSON ELIZABETH MDirectorSell5,000$204.58$1.02M0
Nov 17, 2025LEE LEODirectorSell75,000$195.90$14.69M0
Nov 14, 2025ANDERSON ELIZABETH MDirectorSell10,000$195.87$1.96M0
Nov 12, 2025Schaeffer Orlov S NicoleChief People Strategy OfficerSell30,000$194.00$5.82M0
Nov 11, 2025Flammer Martina M.D.Chief Medical OfficerSell31,226$189.68$5.92M0
Nov 3, 2025Smith Michael AlexanderChief Legal OfficerSell27,130$183.78$4.99M0
Sep 12, 2025Schaeffer Orlov S NicoleChief People Strategy OfficerSell76,520$145.45$11.13M0
Sep 11, 2025SHAROKY MELVIN MDDirectorSell10,000$145.39$1.45M0
Sep 2, 2025Flammer Martina M.D.Chief Medical OfficerSell186,648$144.34$26.94M0
Sep 2, 2025Smith Michael AlexanderChief Legal OfficerSell24,272$143.89$3.49M0
Aug 20, 2025SHAROKY MELVIN MDDirectorSell10,000$129.50$1.29M0
Aug 19, 2025Adsett RogerChief Operating OfficerSell25,000$127.58$3.19M0
Aug 18, 2025Lewis WilliamChair and CEOSell6,865$128.40$881.5K0
Aug 14, 2025Schaeffer Orlov S NicoleChief People Strategy OfficerSell10,000$127.34$1.27M0
Aug 12, 2025SHAROKY MELVIN MDDirectorSell10,000$121.58$1.22M0
Aug 4, 2025Flammer Martina M.D.Chief Medical OfficerSell8,715$109.50$954.3K0
Aug 4, 2025Lewis WilliamChair and CEOSell6,830$109.81$750.0K0
Jul 21, 2025Bonstein SaraChief Financial OfficerSell58,400$102.67$6.00M0
Jul 15, 2025Lewis WilliamChair and CEOSell6,830$102.37$699.2K0
Jul 11, 2025Smith Michael AlexanderChief Legal OfficerSell1,681$99.80$167.8K0
Jul 7, 2025Bonstein SaraChief Financial OfficerSell57,764$95.86$5.54M0
Jul 1, 2025Lewis WilliamChair and CEOSell6,830$98.33$671.6K0
Jun 23, 2025Bonstein SaraChief Financial OfficerSell57,765$101.78$5.88M0
Jun 16, 2025Adsett RogerChief Operating OfficerSell10,686$98.82$1.06M0
Jun 16, 2025Lewis WilliamChair and CEOSell135,009$100.39$13.55M0
Jun 10, 2025Bonstein SaraChief Financial OfficerSell57,766$89.12$5.15M0
Jun 10, 2025Flammer Martina M.D.Chief Medical OfficerSell45,163$91.16$4.12M0
Jun 10, 2025Schaeffer Orlov S NicoleChief People Strategy OfficerSell137,472$92.09$12.66M0
Jun 5, 2025Smith Michael AlexanderChief Legal OfficerSell1,879$73.50$138.1K0
Jun 3, 2025Adsett RogerChief Operating OfficerSell1,860$71.50$133.0K0
Jun 3, 2025Bonstein SaraChief Financial OfficerSell1,579$71.50$112.9K0
Jun 3, 2025Flammer Martina M.D.Chief Medical OfficerSell1,686$71.50$120.5K0
Jun 3, 2025MCGIRR DAVID W JDirectorSell6,250$72.25$451.5K0
Jun 3, 2025Schaeffer Orlov S NicoleChief People Strategy OfficerSell1,642$71.50$117.4K0
Jun 3, 2025Smith Michael AlexanderChief Legal OfficerSell1,448$71.50$103.5K0
Jun 2, 2025Lewis WilliamChair and CEOSell12,302$71.39$878.3K0
May 30, 2025Smith Michael AlexanderChief Legal OfficerSell26,327$69.65$1.83M0
May 20, 2025Desjardins ClarissaDirectorBuy3,025$66.68$201.7K0
May 20, 2025Lewis WilliamChair and CEOSell27,887$67.66$1.89M0
May 15, 2025Flammer Martina M.D.Chief Medical OfficerSell11,724$65.79$771.3K0
May 13, 2025Adsett RogerChief Operating OfficerSell9,407$67.36$633.7K0
May 13, 2025Bonstein SaraChief Financial OfficerSell10,504$67.47$708.7K0
May 13, 2025Flammer Martina M.D.Chief Medical OfficerSell10,152$67.43$684.6K0
May 13, 2025Lewis WilliamChair and CEOSell21,213$66.73$1.42M0
May 13, 2025Schaeffer Orlov S NicoleChief People Strategy OfficerSell6,235$67.37$420.1K0
May 13, 2025Smith Michael AlexanderChief Legal OfficerSell4,816$67.62$325.7K0
May 1, 2025Lewis WilliamChair and CEOSell6,830$72.57$495.7K0
Apr 15, 2025Lewis WilliamChair and CEOSell6,830$70.16$479.2K0
Apr 1, 2025Lewis WilliamChair and CEOSell6,830$73.58$502.6K0
Mar 17, 2025Lewis WilliamChair and CEOSell25,580$77.03$1.97M0
Mar 3, 2025Lewis WilliamChair and CEOSell25,580$77.79$1.99M0

INSM Insider Buying Activity

The following table shows recent insider purchases of Insmed Incorporated (INSM) stock reported via SEC Form 4 filings.

DateInsiderRoleTypeSharesAvg PriceValueShares After
May 20, 2025Desjardins ClarissaDirectorBuy3,025$66.68$201.7K0

INSM Insider Selling Activity

The following table shows recent insider sales of Insmed Incorporated (INSM) stock reported via SEC Form 4 filings.

DateInsiderRoleTypeSharesAvg PriceValueShares After
Mar 5, 2026Lewis Williamdirector, officer: Chair and CEOSell21,398$146.03$3.12M309,801
Feb 25, 2026Smith Michael Alexanderofficer: Chief Legal OfficerSell24,774$155.77$3.86M71,793
Feb 23, 2026Lewis Williamdirector, officer: Chair and CEOSell10,699$150.97$1.62M309,896
Feb 19, 2026Lewis WilliamChair and CEOSell10,699$150.97$1.62M0
Feb 11, 2026Lewis Williamdirector, officer: Chair and CEOSell13,396$147.79$1.98M309,693
Feb 9, 2026Lewis WilliamChair and CEOSell13,396$147.79$1.98M0
Feb 6, 2026Flammer Martina M.D.officer: Chief Medical OfficerSell869$152.44$132.5K83,243
Feb 5, 2026Flammer Martina M.D.Chief Medical OfficerSell869$152.44$132.5K0
Feb 4, 2026Adsett Rogerofficer: Chief Operating OfficerSell791$156.17$123.5K106,810
Feb 4, 2026Bonstein Saraofficer: Chief Financial OfficerSell748$156.34$116.9K79,758
Feb 4, 2026Flammer Martina M.D.officer: Chief Medical OfficerSell8,777$154.70$1.36M92,326
Feb 4, 2026Lewis Williamdirector, officer: Chair and CEOSell3,009$156.34$470.4K303,882
Feb 4, 2026Smith Michael Alexanderofficer: Chief Legal OfficerSell640$156.27$100.0K56,397
Feb 3, 2026Adsett RogerChief Operating OfficerSell791$156.17$123.5K0
Feb 3, 2026Bonstein SaraChief Financial OfficerSell748$156.34$116.9K0
Feb 3, 2026Lewis WilliamChair and CEOSell3,009$156.34$470.4K0
Feb 3, 2026Smith Michael AlexanderChief Legal OfficerSell640$156.27$100.0K0
Feb 2, 2026Flammer Martina M.D.Chief Medical OfficerSell8,777$154.70$1.36M0
Jan 22, 2026Lewis Williamdirector, officer: Chair and CEOSell10,699$158.93$1.70M316,584
Jan 20, 2026Lewis WilliamChair and CEOSell10,699$158.93$1.70M0
Jan 13, 2026Flammer Martina M.D.officer: Chief Medical OfficerSell1,887$186.19$351.3K84,907
Jan 13, 2026Lewis Williamdirector, officer: Chair and CEOSell18,918$168.95$3.20M322,132
Jan 12, 2026Lewis WilliamChair and CEOSell19,215$169.00$3.25M0
Jan 9, 2026Flammer Martina M.D.Chief Medical OfficerSell1,887$186.19$351.3K0
Jan 8, 2026Adsett Rogerofficer: Chief Operating OfficerSell4,290$174.06$746.7K110,462
Jan 8, 2026Bonstein Saraofficer: Chief Financial OfficerSell4,642$174.22$808.7K83,631
Jan 8, 2026Flammer Martina M.D.officer: Chief Medical OfficerSell16,530$174.06$2.88M98,541
Jan 8, 2026Lewis Williamdirector, officer: Chair and CEOSell9,676$174.03$1.68M320,987
Jan 8, 2026Smith Michael Alexanderofficer: Chief Legal OfficerSell3,158$174.00$549.5K58,799
Jan 6, 2026Adsett RogerChief Operating OfficerSell4,290$174.06$746.7K0
Jan 6, 2026Bonstein SaraChief Financial OfficerSell4,642$174.22$808.7K0
Jan 6, 2026Flammer Martina M.D.officer: Chief Medical OfficerSell28,833$172.91$4.99M104,258
Jan 6, 2026Lewis WilliamChair and CEOSell9,676$174.03$1.68M0
Jan 6, 2026Schaeffer Orlov S Nicoleofficer: Chief People Strategy OfficerSell87,290$175.20$15.29M98,014
Jan 6, 2026Smith Michael AlexanderChief Legal OfficerSell3,158$174.00$549.5K0
Jan 2, 2026Flammer Martina M.D.Chief Medical OfficerSell12,303$171.38$2.11M0
Jan 2, 2026Schaeffer Orlov S NicoleChief People Strategy OfficerSell87,290$175.20$15.29M0
Dec 18, 2025Lewis WilliamChair and CEOSell10,699$166.97$1.79M0
Dec 5, 2025SHAROKY MELVIN MDDirectorSell20,000$205.01$4.10M0
Dec 4, 2025Lewis WilliamChair and CEOSell10,699$205.62$2.20M0
Dec 1, 2025Flammer Martina M.D.Chief Medical OfficerSell8,895$206.98$1.84M0
Nov 24, 2025ANDERSON ELIZABETH MDirectorSell5,000$204.58$1.02M0
Nov 17, 2025LEE LEODirectorSell75,000$195.90$14.69M0
Nov 14, 2025ANDERSON ELIZABETH MDirectorSell10,000$195.87$1.96M0
Nov 12, 2025Schaeffer Orlov S NicoleChief People Strategy OfficerSell30,000$194.00$5.82M0
Nov 11, 2025Flammer Martina M.D.Chief Medical OfficerSell31,226$189.68$5.92M0
Nov 3, 2025Smith Michael AlexanderChief Legal OfficerSell27,130$183.78$4.99M0
Sep 12, 2025Schaeffer Orlov S NicoleChief People Strategy OfficerSell76,520$145.45$11.13M0
Sep 11, 2025SHAROKY MELVIN MDDirectorSell10,000$145.39$1.45M0
Sep 2, 2025Flammer Martina M.D.Chief Medical OfficerSell186,648$144.34$26.94M0
Sep 2, 2025Smith Michael AlexanderChief Legal OfficerSell24,272$143.89$3.49M0
Aug 20, 2025SHAROKY MELVIN MDDirectorSell10,000$129.50$1.29M0
Aug 19, 2025Adsett RogerChief Operating OfficerSell25,000$127.58$3.19M0
Aug 18, 2025Lewis WilliamChair and CEOSell6,865$128.40$881.5K0
Aug 14, 2025Schaeffer Orlov S NicoleChief People Strategy OfficerSell10,000$127.34$1.27M0
Aug 12, 2025SHAROKY MELVIN MDDirectorSell10,000$121.58$1.22M0
Aug 4, 2025Flammer Martina M.D.Chief Medical OfficerSell8,715$109.50$954.3K0
Aug 4, 2025Lewis WilliamChair and CEOSell6,830$109.81$750.0K0
Jul 21, 2025Bonstein SaraChief Financial OfficerSell58,400$102.67$6.00M0
Jul 15, 2025Lewis WilliamChair and CEOSell6,830$102.37$699.2K0
Jul 11, 2025Smith Michael AlexanderChief Legal OfficerSell1,681$99.80$167.8K0
Jul 7, 2025Bonstein SaraChief Financial OfficerSell57,764$95.86$5.54M0
Jul 1, 2025Lewis WilliamChair and CEOSell6,830$98.33$671.6K0
Jun 23, 2025Bonstein SaraChief Financial OfficerSell57,765$101.78$5.88M0
Jun 16, 2025Adsett RogerChief Operating OfficerSell10,686$98.82$1.06M0
Jun 16, 2025Lewis WilliamChair and CEOSell135,009$100.39$13.55M0
Jun 10, 2025Bonstein SaraChief Financial OfficerSell57,766$89.12$5.15M0
Jun 10, 2025Flammer Martina M.D.Chief Medical OfficerSell45,163$91.16$4.12M0
Jun 10, 2025Schaeffer Orlov S NicoleChief People Strategy OfficerSell137,472$92.09$12.66M0
Jun 5, 2025Smith Michael AlexanderChief Legal OfficerSell1,879$73.50$138.1K0
Jun 3, 2025Adsett RogerChief Operating OfficerSell1,860$71.50$133.0K0
Jun 3, 2025Bonstein SaraChief Financial OfficerSell1,579$71.50$112.9K0
Jun 3, 2025Flammer Martina M.D.Chief Medical OfficerSell1,686$71.50$120.5K0
Jun 3, 2025MCGIRR DAVID W JDirectorSell6,250$72.25$451.5K0
Jun 3, 2025Schaeffer Orlov S NicoleChief People Strategy OfficerSell1,642$71.50$117.4K0
Jun 3, 2025Smith Michael AlexanderChief Legal OfficerSell1,448$71.50$103.5K0
Jun 2, 2025Lewis WilliamChair and CEOSell12,302$71.39$878.3K0
May 30, 2025Smith Michael AlexanderChief Legal OfficerSell26,327$69.65$1.83M0
May 20, 2025Lewis WilliamChair and CEOSell27,887$67.66$1.89M0
May 15, 2025Flammer Martina M.D.Chief Medical OfficerSell11,724$65.79$771.3K0
May 13, 2025Adsett RogerChief Operating OfficerSell9,407$67.36$633.7K0
May 13, 2025Bonstein SaraChief Financial OfficerSell10,504$67.47$708.7K0
May 13, 2025Flammer Martina M.D.Chief Medical OfficerSell10,152$67.43$684.6K0
May 13, 2025Lewis WilliamChair and CEOSell21,213$66.73$1.42M0
May 13, 2025Schaeffer Orlov S NicoleChief People Strategy OfficerSell6,235$67.37$420.1K0
May 13, 2025Smith Michael AlexanderChief Legal OfficerSell4,816$67.62$325.7K0
May 1, 2025Lewis WilliamChair and CEOSell6,830$72.57$495.7K0
Apr 15, 2025Lewis WilliamChair and CEOSell6,830$70.16$479.2K0
Apr 1, 2025Lewis WilliamChair and CEOSell6,830$73.58$502.6K0
Mar 17, 2025Lewis WilliamChair and CEOSell25,580$77.03$1.97M0
Mar 3, 2025Lewis WilliamChair and CEOSell25,580$77.79$1.99M0

INSM Insiders

Lewis William

director, officer: Chair and CEO

Sold $13.77M
31 tradesLast: Mar 5, 2026
Smith Michael Alexander

officer: Chief Legal Officer

Sold $4.51M
7 tradesLast: Feb 24, 2026
Lewis William

Chair and CEO

Sold $40.86M
96 tradesLast: Feb 19, 2026
Flammer Martina M.D.

Chief Medical Officer

Sold $48.18M
43 tradesLast: Feb 5, 2026
Flammer Martina M.D.

officer: Chief Medical Officer

Sold $6.83M
22 tradesLast: Feb 5, 2026
Adsett Roger

Chief Operating Officer

Sold $5.88M
11 tradesLast: Feb 3, 2026
Adsett Roger

officer: Chief Operating Officer

Sold $870.2K
4 tradesLast: Feb 3, 2026
Bonstein Sara

Chief Financial Officer

Sold $24.31M
19 tradesLast: Feb 3, 2026
Bonstein Sara

officer: Chief Financial Officer

Sold $925.7K
4 tradesLast: Feb 3, 2026
Smith Michael Alexander

Chief Legal Officer

Sold $11.70M
26 tradesLast: Feb 3, 2026
Schaeffer Orlov S Nicole

Chief People Strategy Officer

Sold $46.71M
25 tradesLast: Jan 2, 2026
Schaeffer Orlov S Nicole

officer: Chief People Strategy Officer

Sold $15.29M
5 tradesLast: Jan 2, 2026
SHAROKY MELVIN MD

Director

Sold $8.06M
4 tradesLast: Dec 5, 2025
ANDERSON ELIZABETH M

Director

Sold $2.98M
2 tradesLast: Nov 24, 2025
LEE LEO

Director

Sold $14.69M
5 tradesLast: Nov 17, 2025
MCGIRR DAVID W J

Director

Sold $451.5K
2 tradesLast: Jun 4, 2025
Desjardins Clarissa

Director

Bought $201.7K
2 tradesLast: May 21, 2025