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 61-90 of 98
Date 11 May 2026
Insider FLAMMER, MARTINA M.D.Chief Medical Officer
Side Acquisition
Shares 12949
Price 17.07
Value 221039
Security Common Stock
Date 11 May 2026
Insider FLAMMER, MARTINA M.D.Chief Medical Officer
Side Disposal
Shares 830
Price 101.18
Value 83979
Security Common Stock
Date 11 May 2026
Insider FLAMMER, MARTINA M.D.Chief Medical Officer
Side Disposal
Shares 12949
Price 0.00
Value 0
Security Stock Option (right to buy)
Date 4 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 5318
Price 137.01
Value 728619
Security Common Stock
Date 4 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 2721
Price 137.86
Value 375117
Security Common Stock
Date 4 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Acquisition
Shares 6259
Price 30.46
Value 190649
Security Common Stock
Date 4 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 1247
Price 139.09
Value 173445
Security Common Stock
Date 4 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 599
Price 135.18
Value 80973
Security Common Stock
Date 4 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Acquisition
Shares 4440
Price 17.16
Value 76190
Security Common Stock
Date 4 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 433
Price 134.18
Value 58100
Security Common Stock
Date 4 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 381
Price 139.60
Value 53188
Security Common Stock
Date 4 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 4440
Price 0.00
Value 0
Security Stock Option (right to buy)
Date 4 May 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 6259
Price 0.00
Value 0
Security Stock Option (right to buy)
Date 16 Apr 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 5373
Price 143.81
Value 772691
Security Common Stock
Date 16 Apr 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 2255
Price 144.66
Value 326208
Security Common Stock
Date 16 Apr 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 2246
Price 142.99
Value 321156
Security Common Stock
Date 16 Apr 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Acquisition
Shares 6259
Price 30.46
Value 190649
Security Common Stock
Date 16 Apr 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 825
Price 145.79
Value 120277
Security Common Stock
Date 16 Apr 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Acquisition
Shares 4440
Price 17.16
Value 76190
Security Common Stock
Date 16 Apr 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 4440
Price 0.00
Value 0
Security Stock Option (right to buy)
Date 16 Apr 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 6259
Price 0.00
Value 0
Security Stock Option (right to buy)
Date 6 Apr 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 8478
Price 163.23
Value 1383864
Security Common Stock
Date 6 Apr 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 1434
Price 164.01
Value 235190
Security Common Stock
Date 6 Apr 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Acquisition
Shares 6259
Price 30.46
Value 190649
Security Common Stock
Date 6 Apr 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 787
Price 161.73
Value 127282
Security Common Stock
Date 6 Apr 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Acquisition
Shares 4440
Price 17.16
Value 76190
Security Common Stock
Date 6 Apr 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 6259
Price 0.00
Value 0
Security Stock Option (right to buy)
Date 6 Apr 2026
Insider LEWIS, WILLIAMDirector, Chair and CEO
Side Disposal
Shares 4440
Price 0.00
Value 0
Security Stock Option (right to buy)
Date 1 Apr 2026
Insider ADSETT, ROGERChief Operating Officer
Side Disposal
Shares 62344
Price 164.95
Value 10283643
Security Common Stock
Date 1 Apr 2026
Insider ADSETT, ROGERChief Operating Officer
Side Disposal
Shares 19001
Price 164.11
Value 3118254
Security Common Stock