William Lewis Insider Trading Activity

Corporate InsiderCEO · CIK 1402051

86

Total trades

$45.0M

Total volume

Jun 3, 2026

Last activity

INSM

INSMED Inc

William Lewis has been net-selling over the last 12 months with 0 purchases and 82 sales across 1 company.

INSM is the most-traded position with 82 trades. The largest single transaction was a sale of INSM for $4.9M on Jun 16, 2025.

Performance Scorecard

Forward stock performance after each transaction by William Lewis. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.

PERIODAVG BUY RETURNAVG SELL AVOIDEDSUCCESS RATETRADES
30 days—+0.9%56%81
90 days—-10.6%63%65
120 days—-20.9%55%53

Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.

Price & Trades

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INSM · INSMED Inc

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Recent Trades

Showing the 50 most recent of 86 disclosed trades.

DATETICKERTYPESHARESPRICEVALUEROLE
Jun 3, 2026INSMSell7,605$102.27$778KCEO
May 18, 2026INSMSell7,975$106.97$853KCEO
May 18, 2026INSMSell11,836$106.39$1.3MCEO
May 18, 2026INSMSell5,753$105.32$606KCEO
May 13, 2026INSMSell13,283$116.18$1.5MCEO
May 4, 2026INSMSell433$134.18$58KCEO
May 4, 2026INSMSell5,318$137.01$729KCEO
May 4, 2026INSMSell2,721$137.86$375KCEO
May 4, 2026INSMSell1,247$139.09$173KCEO
May 4, 2026INSMSell381$139.60$53KCEO
May 4, 2026INSMSell599$135.18$81KCEO
Apr 16, 2026INSMSell5,373$143.81$773KCEO
Apr 16, 2026INSMSell2,255$144.66$326KCEO
Apr 16, 2026INSMSell825$145.79$120KCEO
Apr 16, 2026INSMSell2,246$142.99$321KCEO
Apr 6, 2026INSMSell8,478$163.23$1.4MCEO
Apr 6, 2026INSMSell1,434$164.01$235KCEO
Apr 6, 2026INSMSell787$161.73$127KCEO
Mar 19, 2026INSMSell4,537$143.42$651KCEO
Mar 19, 2026INSMSell4,533$144.11$653KCEO
Mar 19, 2026INSMSell1,629$142.17$232KCEO
Mar 5, 2026INSMSell2,589$145.27$376KCEO
Mar 5, 2026INSMSell3,899$146.66$572KCEO
Mar 5, 2026INSMSell2,128$147.54$314KCEO
Mar 5, 2026INSMSell2,083$144.23$300KCEO
Feb 19, 2026INSMSell1,891$150.10$284KCEO
Feb 19, 2026INSMSell3,413$151.12$516KCEO
Feb 19, 2026INSMSell2,377$151.92$361KCEO
Feb 19, 2026INSMSell1,030$153.38$158KCEO
Feb 19, 2026INSMSell1,988$149.17$297KCEO
Feb 9, 2026INSMSell7,221$148.02$1.1MCEO
Feb 9, 2026INSMSell1,287$148.83$192KCEO
Feb 9, 2026INSMSell4,888$147.17$719KCEO
Feb 3, 2026INSMSell3,009$156.34$470KCEO
Jan 20, 2026INSMSell1,006$156.80$158KCEO
Jan 20, 2026INSMSell1,243$158.37$197KCEO
Jan 20, 2026INSMSell5,967$158.99$949KCEO
Jan 20, 2026INSMSell2,229$159.85$356KCEO
Jan 20, 2026INSMSell254$160.70$41KCEO
Jan 12, 2026INSMSell315$174.86$55KCEO
Jan 12, 2026INSMSell3,974$167.73$667KCEO
Jan 12, 2026INSMSell7,176$168.63$1.2MCEO
Jan 12, 2026INSMSell6,996$169.57$1.2MCEO
Jan 12, 2026INSMSell160$170.24$27KCEO
Jan 12, 2026INSMSell297$171.31$51KCEO
Jan 8, 2026INSMSell3,223$174.17$561KCEO
Jan 7, 2026INSMSell2,357$175.07$413KCEO
Jan 6, 2026INSMSell4,096$173.33$710KCEO
Dec 18, 2025INSMSell1,465$163.19$239KCEO
Dec 18, 2025INSMSell447$164.24$73KCEO

Top Companies Traded

TICKERCOMPANYTRADESTOTAL VOLUME
INSMINSMED Inc86$45.0M

Other insiders at INSMED Inc

7 other tracked filers at INSM.

Martina Flammer, M.D.

Chief Medical Officer

44

Trades

Michael Alexander Smith

Chief Legal Officer

30

Trades

Schaeffer Orlov S Nicole

Chief People Strategy Officer

23

Trades

Bonstein Sara

CFO

18

Trades

Adsett Roger

COO

13

Trades

Leo Lee

Director

5

Trades

Melvin Sharoky MD

Director

4

Trades