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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 $23.8B 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
Dec 9, 2025 (view filing)Dec 54 daysSharoky Melvin MDDirectorSSale−20.0K$205.01−$4.10M−7.6%243.9K after
Dec 5, 2025 (view filing)Dec 41 dayLewis WilliamChair and CEOSSale−10.7K$205.62−$2.20M−3.4%303.9K after4 lots10b5-1
Dec 3, 2025 (view filing)Dec 12 daysFlammer Martina M.D.Chief Medical OfficerSSale−8.89K$206.98−$1.84M−9.7%83.1K after3 lots10b5-1
Nov 26, 2025 (view filing)Nov 242 daysAnderson Elizabeth MDirectorSSale−5.00K$204.58−$1.02M−7.8%58.7K after
Nov 18, 2025 (view filing)Nov 144 daysAnderson Elizabeth MDirectorSSale−10.0K$195.87−$1.96M−13.6%63.7K after
Nov 18, 2025 (view filing)Nov 171 dayLee LeoDirectorSSale−75.0K$195.90−$14.7M−57.8%54.7K after5 lots
Nov 14, 2025 (view filing)Nov 122 daysSchaeffer Orlov S NicoleChief People Strategy OfficerSSale−30.0K$194.00−$5.82M−45.1%36.5K after4 lots
Nov 13, 2025 (view filing)Nov 112 daysFlammer Martina M.D.Chief Medical OfficerSSale−31.2K$189.68−$5.92M−27.3%83.1K after4 lots10b5-1
Nov 5, 2025 (view filing)Nov 32 daysSmith Michael AlexanderChief Legal OfficerSSale−27.1K$183.78−$4.99M−33.1%54.9K after8 lots10b5-1
Sep 15, 2025 (view filing)Sep 123 daysSchaeffer Orlov S NicoleChief People Strategy OfficerSSale−76.5K$145.45−$11.1M−67.7%36.5K after4 lots10b5-1
Sep 15, 2025 (view filing)Sep 123 daysSharoky Melvin MDDirectorSSale−10.0K$145.39−$1.45M−3.7%262.7K after
Sep 4, 2025 (view filing)Sep 22 daysSmith Michael AlexanderChief Legal OfficerSSale−24.3K$143.89−$3.49M−30.7%54.9K after6 lots10b5-1
Sep 4, 2025 (view filing)Sep 22 daysFlammer Martina M.D.Chief Medical OfficerSSale−186.6K$144.34−$26.9M−69.2%83.1K after6 lots10b5-1
Aug 21, 2025 (view filing)Aug 192 daysAdsett RogerChief Operating OfficerSSale−25.0K$127.58−$3.19M−19.1%105.6K after2 lots
Aug 21, 2025 (view filing)Aug 201 daySharoky Melvin MDDirectorSSale−10.0K$129.50−$1.29M−3.5%274.5K after
Aug 20, 2025 (view filing)Aug 182 daysLewis WilliamChair and CEOSSale−6.87K$128.40−$881.5K−2.9%233.9K after3 lots10b5-1
Aug 18, 2025 (view filing)Aug 144 daysSchaeffer Orlov S NicoleChief People Strategy OfficerSSale−10.0K$127.34−$1.27M−11.1%79.8K after3 lots
Aug 14, 2025 (view filing)Aug 122 daysSharoky Melvin MDDirectorSSale−10.0K$121.58−$1.22M−3.3%290.6K after
Aug 6, 2025 (view filing)Aug 42 daysFlammer Martina M.D.Chief Medical OfficerSSale−8.71K$109.50−$954.3K−9.5%83.1K after10b5-1
Aug 6, 2025 (view filing)Aug 42 daysLewis WilliamChair and CEOSSale−6.83K$109.81−$750.0K−2.8%233.9K after3 lots10b5-1
Jul 23, 2025 (view filing)Jul 212 daysBonstein SaraChief Financial OfficerSSale−58.4K$102.67−$6.00M−44.3%73.5K after2 lots10b5-1
Jul 15, 2025 (view filing)Jul 15Same dayLewis WilliamChair and CEOSSale−6.83K$102.37−$699.2K−2.8%233.9K after3 lots10b5-1
Jul 15, 2025 (view filing)Jul 11-154 daysSmith Michael AlexanderChief Legal OfficerSSale−1.68K$99.80−$167.8K−2.5%66.4K after2 lots10b5-1
Jul 9, 2025 (view filing)Jul 72 daysBonstein SaraChief Financial OfficerSSale−57.8K$95.86−$5.54M−40.7%84.0K after2 lots10b5-1
Jul 2, 2025 (view filing)Jul 11 dayLewis WilliamChair and CEOSSale−6.83K$98.33−$671.6K−2.8%233.9K after3 lots10b5-1
Jun 25, 2025 (view filing)Jun 232 daysBonstein SaraChief Financial OfficerSSale−57.8K$101.78−$5.88M−38.2%93.5K after2 lots10b5-1
Jun 18, 2025 (view filing)Jun 162 daysLewis WilliamChair and CEOSSale−5.20K$100.32−$522.1K−1.7%303.6K after4 lots10b5-1
Jun 18, 2025 (view filing)Jun 162 daysLewis WilliamChair and CEOSSale−129.8K$100.39−$13.0M−35.7%233.9K after4 lots10b5-1
Jun 18, 2025 (view filing)Jun 162 daysAdsett RogerChief Operating OfficerSSale−10.7K$98.82−$1.06M−7.6%130.6K after2 lots10b5-1
Jun 12, 2025 (view filing)Jun 10-112 daysFlammer Martina M.D.Chief Medical OfficerSSale−45.2K$91.16−$4.12M−35.2%83.1K after2 lots10b5-1
Jun 12, 2025 (view filing)Jun 10-112 daysSchaeffer Orlov S NicoleChief People Strategy OfficerSSale−137.5K$92.09−$12.7M−60.6%89.4K after6 lots10b5-1
Jun 12, 2025 (view filing)Jun 102 daysBonstein SaraChief Financial OfficerSSale−57.8K$89.12−$5.15M−35.8%103.4K after6 lots10b5-1
Jun 6, 2025 (view filing)Jun 51 daySmith Michael AlexanderChief Legal OfficerSSale−1.88K$73.50−$138.1K−2.7%67.7K after10b5-1
Jun 4, 2025 (view filing)Jun 31 daySmith Michael AlexanderChief Legal OfficerSSale−1.45K$71.50−$103.5K−2.0%69.6K after
Jun 4, 2025 (view filing)Jun 31 dayFlammer Martina M.D.Chief Medical OfficerSSale−1.69K$71.50−$120.5K−2.0%83.1K after
Jun 4, 2025 (view filing)Jun 31 dayAdsett RogerChief Operating OfficerSSale−1.86K$71.50−$133.0K−1.3%141.3K after
Jun 4, 2025 (view filing)Jun 31 dayBonstein SaraChief Financial OfficerSSale−1.58K$71.50−$112.9K−1.4%113.3K after
Jun 4, 2025 (view filing)Jun 31 daySchaeffer Orlov S NicoleChief People Strategy OfficerSSale−1.64K$71.50−$117.4K−1.4%118.6K after
Jun 4, 2025 (view filing)Jun 3-41 dayMcGirr David W JDirectorSSale−6.25K$72.25−$451.5K−6.0%97.7K after2 lots10b5-1
Jun 4, 2025 (view filing)Jun 22 daysLewis WilliamChair and CEOSSale−6.83K$71.31−$487.0K−2.8%233.9K after3 lots10b5-1
Jun 4, 2025 (view filing)Jun 31 dayLewis WilliamChair and CEOSSale−5.47K$71.50−$391.2K−1.7%308.8K after10b5-1
Jun 3, 2025 (view filing)May 304 daysSmith Michael AlexanderChief Legal OfficerSSale−26.3K$69.65−$1.83M−27.0%71.0K after2 lots10b5-1
May 22, 2025 (view filing)May 20-212 daysDesjardins ClarissaDirectorPPurchase+3.02K$66.68+$201.7KNew position3.02K after2 lots
May 22, 2025 (view filing)May 202 daysLewis WilliamChair and CEOSSale−21.1K$67.65−$1.42M−6.3%314.2K after3 lots10b5-1
May 22, 2025 (view filing)May 202 daysLewis WilliamChair and CEOSSale−6.83K$67.72−$462.5K−2.8%233.9K after3 lots10b5-1
May 19, 2025 (view filing)May 15-164 daysFlammer Martina M.D.Chief Medical OfficerSSale−11.7K$65.79−$771.3K−12.1%84.8K after2 lots10b5-1
May 15, 2025 (view filing)May 13-142 daysSmith Michael AlexanderChief Legal OfficerSSale−4.82K$67.62−$325.7K−5.0%91.8K after2 lots
May 15, 2025 (view filing)May 13-142 daysSchaeffer Orlov S NicoleChief People Strategy OfficerSSale−6.24K$67.37−$420.1K−5.2%114.6K after2 lots
May 15, 2025 (view filing)May 13-142 daysLewis WilliamChair and CEOSSale−21.2K$66.73−$1.42M−6.3%313.0K after3 lots
May 15, 2025 (view filing)May 13-142 daysFlammer Martina M.D.Chief Medical OfficerSSale−10.2K$67.43−$684.6K−10.1%90.0K after2 lots