Company Insider Tape

Insmed Inc insider transactions

Executive and director filing history, acquisition and disposal balance, executive concentration, cadence, and stored market context.

Symbol INSM Latest filing 23 Jul 2026

Company Read

Net disposal

INSM has 98 stored insider filings. Acquisitions account for 28.6% of classified filings and disposals account for 71.4%. The largest stored filing is $10.3M from ADSETT, ROGER.

Latest filing 23 Jul 2026most recent stored row
Largest filing $10.3Mreported transaction value
Total filings 98stored transaction rows
Acquisition value $4.4M28 acquisitions
Disposal value $41.4M70 disposals
Net value $-36.9Macquisitions minus disposals

Filing cadence

Last 12 active months
Mar 2026 5
Apr 2026 20
May 2026 35
Jun 2026 19
Jul 2026 19

Acquisitions 28.6% · Disposals 71.4%

Mar 2026 $3.5M
Apr 2026 $19.6M
May 2026 $12.7M
Jun 2026 $5.5M
Jul 2026 $4.6M

Executive concentration

By filing count
LEWIS, WILLIAM Director, Chair and CEO · 57 filings
FLAMMER, MARTINA M.D. Chief Medical Officer · 15 filings
SMITH, MICHAEL ALEXANDER Chief Legal Officer · 9 filings
ADSETT, ROGER Chief Operating Officer · 7 filings
BONSTEIN, SARA Chief Financial Officer · 2 filings
BUTERA, SAMUELE SVP, GM, Global Respiratory · 2 filings
ANDERSON, ELIZABETH M Director · 1 filings
SCHAFER, CAROL Director · 1 filings

Market Context

INSM weekly market snapshot

Week 31 Jul 2026
Latest close 98.60 USDstored weekly close
1-week move -7.8%latest weekly bar
13-week move -11.6%medium-term context
Relative Strength -38.5Sharemaestro indicator
Fair value gap +15.2%price vs fair value
Trend signal 0smoothed trend state

Transaction History

Latest insider filings for INSM

Showing 31-60 of 98
Date 22 Jun 2026
Insider SMITH, MICHAEL ALEXANDERChief Legal Officer
Side Disposal
Shares 1806
Price 95.82
Value 173051
Security Common Stock
Date 8 Jun 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 6515
Price 94.03
Value 612605
Security Common Stock
Date 5 Jun 2026
Insider FLAMMER, MARTINA M.D.Chief Medical Officer
Side Disposal
Shares 1858
Price 103.78
Value 192823
Security Common Stock
Date 3 Jun 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 7605
Price 102.27
Value 777763
Security Common Stock
Date 3 Jun 2026
Insider FLAMMER, MARTINA M.D.Chief Medical Officer
Side Disposal
Shares 2566
Price 102.27
Value 262425
Security Common Stock
Date 3 Jun 2026
Insider BONSTEIN, SARAChief Financial Officer
Side Disposal
Shares 2404
Price 102.27
Value 245857
Security Common Stock
Date 3 Jun 2026
Insider ADSETT, ROGERChief Operating Officer
Side Disposal
Shares 2370
Price 102.27
Value 242380
Security Common Stock
Date 3 Jun 2026
Insider SMITH, MICHAEL ALEXANDERChief Legal Officer
Side Disposal
Shares 2159
Price 102.27
Value 220801
Security Common Stock
Date 22 May 2026
Insider SMITH, MICHAEL ALEXANDERChief Legal Officer
Side Disposal
Shares 6149
Price 108.47
Value 666982
Security Common Stock
Date 18 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 11836
Price 106.39
Value 1259232
Security Common Stock
Date 18 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 7975
Price 106.97
Value 853086
Security Common Stock
Date 18 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 5753
Price 105.32
Value 605906
Security Common Stock
Date 18 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Acquisition
Shares 6259
Price 30.46
Value 190649
Security Common Stock
Date 18 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Acquisition
Shares 4440
Price 17.16
Value 76190
Security Common Stock
Date 18 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 6259
Price 0.00
Value 0
Security Stock Option (right to buy)
Date 18 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 4440
Price 0.00
Value 0
Security Stock Option (right to buy)
Date 14 May 2026
Insider FLAMMER, MARTINA M.D.Chief Medical Officer
Side Disposal
Shares 10479
Price 117.54
Value 1231702
Security Common Stock
Date 13 May 2026
Insider ANDERSON, ELIZABETH MDirector
Side Acquisition
Shares 3305
Price -
Value -
Security Common Stock
Date 13 May 2026
Insider BRENNAN, DAVID RDirector
Side Acquisition
Shares 3305
Price -
Value -
Security Common Stock
Date 13 May 2026
Insider DESJARDINS, CLARISSADirector
Side Acquisition
Shares 3305
Price -
Value -
Security Common Stock
Date 13 May 2026
Insider LEE, LEODirector
Side Acquisition
Shares 3305
Price -
Value -
Security Common Stock
Date 13 May 2026
Insider SCHAFER, CAROLDirector
Side Acquisition
Shares 3305
Price -
Value -
Security Common Stock
Date 13 May 2026
Insider SHAROKY, MELVIN MDDirector
Side Acquisition
Shares 3305
Price -
Value -
Security Common Stock
Date 13 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 13283
Price 116.18
Value 1543219
Security Common Stock
Date 13 May 2026
Insider BONSTEIN, SARAChief Financial Officer
Side Disposal
Shares 8272
Price 116.18
Value 961041
Security Common Stock
Date 13 May 2026
Insider ADSETT, ROGERChief Operating Officer
Side Disposal
Shares 5837
Price 116.18
Value 678143
Security Common Stock
Date 13 May 2026
Insider FLAMMER, MARTINA M.D.Chief Medical Officer
Side Disposal
Shares 4470
Price 112.76
Value 504037
Security Common Stock
Date 13 May 2026
Insider SMITH, MICHAEL ALEXANDERChief Legal Officer
Side Disposal
Shares 4109
Price 116.18
Value 477384
Security Common Stock
Date 13 May 2026
Insider FLAMMER, MARTINA M.D.Chief Medical Officer
Side Disposal
Shares 3384
Price 116.18
Value 393153
Security Common Stock
Date 11 May 2026
Insider FLAMMER, MARTINA M.D.Chief Medical Officer
Side Disposal
Shares 12119
Price 100.35
Value 1216142
Security Common Stock