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INSMED Inc

INSM
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001104506

In the last 90 days, INSMED Inc insiders filed 0 open-market purchases and 7 sales; 667 institutions reported holding it in 13F filings for Q2 2026, worth $23.9B in total; superinvestors Maverick Capital and Duquesne Family Office hold it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by INSMED Inc insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
7 filings
5 insiders, $42.9M in total
Insiders trading
5
Net value
−$42.9M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for INSMED Inc, current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for INSMED Inc
NameTitleLast reported holdingLast filingFilings, past year
Brennan David RDirector39,238Sep 11, 20264
Sharoky Melvin MDDirector0IndirectAug 19, 20265
Adsett RogerChief Operating Officer98,744Aug 12, 20267
Flammer Martina M.D.Chief Medical Officer60,486Aug 7, 202612
Lewis WilliamChair and CEO259,058Jul 24, 202621
Smith Michael AlexanderChief Legal Officer37,648Jun 24, 202610
Butera SamueleSVP, GM, Global Respiratory7,342Jun 24, 20261
Bonstein SaraChief Financial Officer69,082Jun 5, 20265
Schafer CarolDirector66,622May 15, 20261
Lee LeoDirector57,971May 15, 20262
Anderson Elizabeth MDirector62,034May 15, 20263
Desjardins ClarissaDirector70,312May 15, 20261
McGirr David W JDirector53,400IndirectFeb 11, 20261
Schaeffer Orlov S NicoleChief People Strategy Officer41,754Jan 6, 20262
Wise John DraytonChief Commercial Officer133,015Feb 7, 20250
Altomari AlfredDirector69,495May 15, 20240
Engelsen Steinar JDirector320,802Nov 3, 20210
Soriano JohnChief Compliance Officer35,204Sep 9, 20210

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Sep 11, 2026 (view filing)4:04 PM ETSep 92 daysBrennan David RDirectorSSale−25.0K$124.00−$3.10M−38.9%39.2K after
Aug 19, 2026 (view filing)4:10 PM ETAug 172 daysSharoky Melvin MDDirectorSSale−5.00K$127.53−$637.6K−100.0%0 after
Aug 12, 2026 (view filing)5:04 PM ETAug 102 daysAdsett RogerChief Operating OfficerSSale−239.8K$133.27−$32.0M−70.8%98.7K after
Aug 7, 2026 (view filing)4:39 PM ETAug 61 dayFlammer Martina M.D.Chief Medical OfficerSSale−27.2K$128.61−$3.49M−31.0%60.5K after2 lots10b5-1
Jul 24, 2026 (view filing)5:02 PM ETJul 231 dayLewis WilliamChair and CEOSSale−10.7K$106.06−$1.13M−4.0%259.1K after2 lots10b5-1
Jul 10, 2026 (view filing)4:02 PM ETJul 91 dayLewis WilliamChair and CEOSSale−10.7K$117.40−$1.26M−4.0%259.1K after3 lots10b5-1
Jul 8, 2026 (view filing)4:03 PM ETJul 62 daysFlammer Martina M.D.Chief Medical OfficerSSale−12.3K$109.98−$1.35M−16.9%60.5K after2 lots10b5-1
Jun 26, 2026 (view filing)Jun 251 dayLewis WilliamChair and CEOSSale−21.4K$103.32−$2.21M−7.6%258.9K after5 lots10b5-1
Jun 24, 2026 (view filing)Jun 222 daysSmith Michael AlexanderChief Legal OfficerSSale−1.81K$95.82−$173.1K−4.6%37.6K after10b5-1
Jun 10, 2026 (view filing)Jun 82 daysLewis WilliamChair and CEOSSale−6.51K$94.03−$612.6K−2.5%258.9K after10b5-1
Jun 5, 2026 (view filing)Jun 32 daysSmith Michael AlexanderChief Legal OfficerSSale−2.16K$102.27−$220.8K−5.2%39.5K after
Jun 5, 2026 (view filing)Jun 3-52 daysFlammer Martina M.D.Chief Medical OfficerSSale−4.42K$102.90−$455.2K−6.8%60.5K after2 lots10b5-1
Jun 5, 2026 (view filing)Jun 32 daysAdsett RogerChief Operating OfficerSSale−2.37K$102.27−$242.4K−2.3%98.6K after
Jun 5, 2026 (view filing)Jun 32 daysBonstein SaraChief Financial OfficerSSale−2.40K$102.27−$245.9K−3.4%69.1K after
Jun 5, 2026 (view filing)Jun 32 daysLewis WilliamChair and CEOSSale−7.61K$102.27−$777.8K−2.8%265.4K after
May 22, 2026 (view filing)May 22Same daySmith Michael AlexanderChief Legal OfficerSSale−6.15K$108.47−$667.0K−12.9%41.6K after10b5-1
May 20, 2026 (view filing)May 182 daysLewis WilliamChair and CEOSSale−25.6K$106.33−$2.72M−8.6%273.0K after3 lots10b5-1
May 15, 2026 (view filing)May 132 daysSmith Michael AlexanderChief Legal OfficerSSale−4.11K$116.18−$477.4K−7.9%47.8K after
May 15, 2026 (view filing)May 13-142 daysFlammer Martina M.D.Chief Medical OfficerSSale−18.3K$116.12−$2.13M−22.0%64.9K after3 lots10b5-1
May 15, 2026 (view filing)May 132 daysAdsett RogerChief Operating OfficerSSale−5.84K$116.18−$678.1K−5.5%101.0K after
May 15, 2026 (view filing)May 132 daysBonstein SaraChief Financial OfficerSSale−8.27K$116.18−$961.0K−10.4%71.5K after
May 15, 2026 (view filing)May 132 daysLewis WilliamChair and CEOSSale−13.3K$116.18−$1.54M−4.4%287.9K after
May 13, 2026 (view filing)May 112 daysFlammer Martina M.D.Chief Medical OfficerSSale−12.9K$100.40−$1.30M−13.5%83.2K after2 lots10b5-1
May 6, 2026 (view filing)May 42 daysLewis WilliamChair and CEOSSale−10.7K$137.34−$1.47M−3.4%301.2K after6 lots10b5-1
Apr 17, 2026 (view filing)Apr 161 dayLewis WilliamChair and CEOSSale−10.7K$143.97−$1.54M−3.4%301.2K after4 lots10b5-1
Apr 8, 2026 (view filing)Apr 62 daysLewis WilliamChair and CEOSSale−10.7K$163.22−$1.75M−3.4%301.2K after3 lots10b5-1
Apr 3, 2026 (view filing)Apr 12 daysAdsett RogerChief Operating OfficerSSale−88.1K$164.63−$14.5M−45.2%106.8K after3 lots10b5-1
Mar 31, 2026 (view filing)Mar 301 daySmith Michael AlexanderChief Legal OfficerSSale−19.6K$150.98−$2.96M−27.5%51.9K after10b5-1
Mar 20, 2026 (view filing)Mar 191 dayLewis WilliamChair and CEOSSale−10.7K$143.52−$1.54M−3.4%301.2K after3 lots10b5-1
Mar 5, 2026 (view filing)Mar 5Same dayLewis WilliamChair and CEOSSale−10.7K$146.03−$1.56M−3.4%301.2K after4 lots10b5-1
Feb 25, 2026 (view filing)Feb 241 daySmith Michael AlexanderChief Legal OfficerSSale−24.8K$155.77−$3.86M−32.3%51.9K after3 lots10b5-1
Feb 23, 2026 (view filing)Feb 194 daysLewis WilliamChair and CEOSSale−10.7K$150.97−$1.62M−3.4%301.2K after5 lots10b5-1
Feb 11, 2026 (view filing)Feb 92 daysLewis WilliamChair and CEOSSale−13.4K$147.79−$1.98M−4.3%301.2K after3 lots10b5-1
Feb 6, 2026 (view filing)Feb 51 dayFlammer Martina M.D.Chief Medical OfficerSSale−869$152.44−$132.5K−1.0%83.2K after10b5-1
Feb 4, 2026 (view filing)Feb 31 daySmith Michael AlexanderChief Legal OfficerSSale−640$156.27−$100.0K−1.1%56.4K after
Feb 4, 2026 (view filing)Feb 2-32 daysFlammer Martina M.D.Chief Medical OfficerSSale−8.78K$154.70−$1.36M−9.4%84.1K after6 lots10b5-1
Feb 4, 2026 (view filing)Feb 31 dayAdsett RogerChief Operating OfficerSSale−791$156.17−$123.5K−0.7%106.8K after
Feb 4, 2026 (view filing)Feb 31 dayBonstein SaraChief Financial OfficerSSale−748$156.34−$116.9K−0.9%79.8K after
Feb 4, 2026 (view filing)Feb 31 dayLewis WilliamChair and CEOSSale−3.01K$156.34−$470.4K−1.0%303.9K after
Jan 22, 2026 (view filing)Jan 202 daysLewis WilliamChair and CEOSSale−10.7K$158.93−$1.70M−3.4%306.9K after5 lots10b5-1
Jan 13, 2026 (view filing)Jan 94 daysFlammer Martina M.D.Chief Medical OfficerSSale−1.89K$186.19−$351.3K−2.2%84.9K after10b5-1
Jan 13, 2026 (view filing)Jan 121 dayLewis WilliamChair and CEOSSale−19.2K$169.00−$3.25M−5.9%306.9K after7 lots10b5-1
Jan 8, 2026 (view filing)Jan 6-82 daysSmith Michael AlexanderChief Legal OfficerSSale−3.16K$174.00−$549.5K−5.2%57.0K after3 lots
Jan 8, 2026 (view filing)Jan 6-82 daysFlammer Martina M.D.Chief Medical OfficerSSale−16.5K$174.06−$2.88M−16.0%86.8K after7 lots10b5-1
Jan 8, 2026 (view filing)Jan 6-82 daysAdsett RogerChief Operating OfficerSSale−4.29K$174.06−$746.7K−3.8%107.6K after3 lots
Jan 8, 2026 (view filing)Jan 6-82 daysBonstein SaraChief Financial OfficerSSale−4.64K$174.22−$808.7K−5.5%80.5K after3 lots
Jan 8, 2026 (view filing)Jan 6-82 daysLewis WilliamChair and CEOSSale−9.68K$174.03−$1.68M−3.0%315.4K after3 lots
Jan 6, 2026 (view filing)Jan 51 dayFlammer Martina M.D.Chief Medical OfficerSSale−12.3K$171.38−$2.11M−11.5%94.8K after7 lots10b5-1
Jan 6, 2026 (view filing)Jan 24 daysSchaeffer Orlov S NicoleChief People Strategy OfficerSSale−87.3K$175.20−$15.3M−67.6%41.8K after5 lots10b5-1
Dec 19, 2025 (view filing)Dec 181 dayLewis WilliamChair and CEOSSale−10.7K$166.97−$1.79M−3.4%303.9K after10 lots10b5-1