INSMED Inc (INSM)

Latest Insider Confidence Score

2026Q1

36.7
Bearish

Company insider confidence (by quarter)

2014Q2 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
Lewis William CEO 699,179 Dec 5, 2025
Engelsen Steinar J Director 320,802 Nov 3, 2021
Sharoky Melvin Md Director 227,976 Mar 4, 2022
Pellizzari Christine A Chief Legal Officer 149,985 May 18, 2021
Flammer Martina M.D. Chief Medical Officer 145,376 Dec 3, 2025

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Mar 5, 2026 Mar 5, 2026 Lewis William CEO Sell 43.8 -10,699 -1.96% ✓ $1.6M
Mar 3, 2026 Mar 5, 2026 SHAROKY MELVIN MD Director Neutral 52.5 -100 -0.04% ✗ -
Feb 25, 2026 Feb 27, 2026 SHAROKY MELVIN MD Director Neutral 52.5 -100 -0.04% ✗ -
Feb 24, 2026 Feb 25, 2026 Smith Michael Alexander Chief Legal Officer Sell 8.8 -24,774 -32.32% ✓ $3.9M
Feb 23, 2026 Feb 25, 2026 Brennan David R Director Neutral 27.5 -6,000 -4.73% ✗ -
Feb 19, 2026 Feb 23, 2026 Lewis William CEO Sell 43.8 -10,699 -1.79% ✓ $1.6M
Feb 9, 2026 Feb 11, 2026 MCGIRR DAVID W J Director Neutral 52.5 - 0.00% ✗ -
Feb 9, 2026 Feb 11, 2026 Lewis William CEO Sell 40.0 -13,396 -2.24% ✓ $2M
Feb 5, 2026 Feb 6, 2026 Flammer Martina M.D. Chief Medical Officer Sell 46.3 -869 -1.03% ✓ $132.5K
Feb 3, 2026 Feb 4, 2026 Adsett Roger COO Sell 45.0 -791 -0.74% ✗ $123.5K
Feb 3, 2026 Feb 4, 2026 Bonstein Sara CFO Sell 45.0 -748 -0.93% ✗ $116.9K
Feb 3, 2026 Feb 4, 2026 Lewis William CEO Sell 42.5 -3,009 -0.51% ✗ $470.4K
Feb 3, 2026 Feb 4, 2026 Smith Michael Alexander Chief Legal Officer Sell 42.5 -640 -1.12% ✗ $100K
Feb 2, 2026 Feb 4, 2026 Flammer Martina M.D. Chief Medical Officer Sell 27.5 -8,777 -9.45% ✓ $1.4M
Jan 20, 2026 Jan 22, 2026 Lewis William CEO Sell 43.8 -10,699 -1.78% ✓ $1.7M
Jan 12, 2026 Jan 13, 2026 Lewis William CEO Sell 36.3 -19,215 -3.15% ✓ $3.2M
Jan 9, 2026 Jan 13, 2026 Flammer Martina M.D. Chief Medical Officer Sell 41.3 -1,887 -2.17% ✓ $351.3K
Jan 6, 2026 Jan 8, 2026 Adsett Roger COO Sell 40.0 -4,290 -3.83% ✗ $746.7K
Jan 6, 2026 Jan 8, 2026 Bonstein Sara CFO Sell 40.0 -4,642 -5.45% ✗ $808.7K
Jan 6, 2026 Jan 8, 2026 Flammer Martina M.D. Chief Medical Officer Sell 18.8 -16,530 -16.00% ✓ $2.9M
Jan 6, 2026 Jan 8, 2026 Lewis William CEO Sell 37.5 -9,676 -1.59% ✗ $1.7M
Jan 6, 2026 Jan 8, 2026 Smith Michael Alexander Chief Legal Officer Sell 40.0 -3,158 -5.25% ✗ $549.5K
Jan 2, 2026 Jan 6, 2026 Bonstein Sara CFO Neutral 90.0 +11,643 15.84% ✗ -
Jan 2, 2026 Jan 6, 2026 Lewis William CEO Neutral 82.5 +21,172 3.60% ✗ -
Jan 2, 2026 Jan 6, 2026 Flammer Martina M.D. Chief Medical Officer Sell 50.0 -660 -0.08% ✓ $2.1M
Jan 2, 2026 Jan 6, 2026 Adsett Roger COO Neutral 85.0 +5,998 5.66% ✗ -
Jan 2, 2026 Jan 6, 2026 Smith Michael Alexander Chief Legal Officer Neutral 85.0 +5,293 9.64% ✗ -
Jan 2, 2026 Jan 6, 2026 Schaeffer Orlov S Nicole Chief People Strategy Officer Sell 17.5 -81,997 -19.50% ✓ $15.3M
Dec 18, 2025 Dec 19, 2025 Lewis William CEO Sell 40.0 -10,699 -1.79% ✓ $1.8M
Dec 5, 2025 Dec 9, 2025 SHAROKY MELVIN MD Director Sell 17.5 -20,000 -6.90% ✗ $4.1M
Dec 4, 2025 Dec 5, 2025 Lewis William CEO Sell 40.0 -10,699 -1.79% ✓ $2.2M
Dec 1, 2025 Dec 3, 2025 Flammer Martina M.D. Chief Medical Officer Sell 23.8 -8,895 -9.67% ✓ $1.8M
Nov 24, 2025 Nov 26, 2025 ANDERSON ELIZABETH M Director Sell 17.5 -5,000 -7.85% ✗ $1M
Nov 17, 2025 Nov 18, 2025 LEE LEO Director Sell 15.0 -75,000 -57.84% ✗ $14.7M
Nov 14, 2025 Nov 18, 2025 ANDERSON ELIZABETH M Director Sell 17.5 -10,000 -13.56% ✗ $2M
Nov 12, 2025 Nov 14, 2025 Schaeffer Orlov S Nicole Chief People Strategy Officer Sell 16.3 -30,000 -45.14% ✗ $5.8M
Nov 11, 2025 Nov 13, 2025 Flammer Martina M.D. Chief Medical Officer Sell 3.8 -31,226 -27.31% ✓ $5.9M
Nov 6, 2025 Nov 10, 2025 Brennan David R Director Neutral 52.5 - 0.00% ✗ -
Nov 3, 2025 Nov 5, 2025 Smith Michael Alexander Chief Legal Officer Sell 5.0 -27,130 -33.07% ✓ $5M
Sep 12, 2025 Sep 15, 2025 Schaeffer Orlov S Nicole Chief People Strategy Officer Sell 2.5 -76,520 -67.73% ✓ $11.1M
Sep 11, 2025 Sep 15, 2025 SHAROKY MELVIN MD Director Sell 17.5 -12,000 -3.91% ✗ $1.5M
Sep 4, 2025 Sep 5, 2025 Schaeffer Orlov S Nicole Chief People Strategy Officer Neutral 27.5 -23,303 -29.21% ✗ -
Sep 2, 2025 Sep 4, 2025 Smith Michael Alexander Chief Legal Officer Sell 5.0 -24,272 -30.66% ✓ $3.5M
Sep 2, 2025 Sep 4, 2025 Flammer Martina M.D. Chief Medical Officer Sell 2.5 -186,648 -69.19% ✓ $26.9M
Aug 20, 2025 Aug 21, 2025 SHAROKY MELVIN MD Director Sell 17.5 -10,000 -3.16% ✗ $1.3M
Aug 19, 2025 Aug 21, 2025 Adsett Roger COO Sell 17.5 -25,000 -19.14% ✗ $3.2M
Aug 18, 2025 Aug 20, 2025 Lewis William CEO Sell 42.5 -6,865 -1.15% ✓ $881.5K
Aug 14, 2025 Aug 18, 2025 Schaeffer Orlov S Nicole Chief People Strategy Officer Sell 17.5 -10,000 -11.14% ✗ $1.3M
Aug 12, 2025 Aug 14, 2025 SHAROKY MELVIN MD Director Sell 17.5 -26,100 -7.24% ✗ $1.2M
Aug 4, 2025 Aug 6, 2025 Lewis William CEO Sell 42.5 -6,830 -1.15% ✓ $750K
Aug 4, 2025 Aug 6, 2025 Flammer Martina M.D. Chief Medical Officer Sell 26.3 -8,715 -9.49% ✓ $954.3K
Jul 21, 2025 Jul 23, 2025 Bonstein Sara CFO Sell 3.8 -58,400 -44.27% ✓ $6M
Jul 15, 2025 Jul 15, 2025 Lewis William CEO Sell 42.5 -6,830 -1.15% ✓ $699.2K
Jul 11, 2025 Jul 15, 2025 Smith Michael Alexander Chief Legal Officer Sell 41.3 -1,681 -2.47% ✓ $167.8K
Jul 7, 2025 Jul 9, 2025 Bonstein Sara CFO Sell 3.8 -57,764 -40.74% ✓ $5.5M
Jul 1, 2025 Jul 2, 2025 Lewis William CEO Sell 42.5 -6,830 -1.15% ✓ $671.6K
Jun 23, 2025 Jun 25, 2025 Bonstein Sara CFO Sell 3.8 -57,765 -38.18% ✓ $5.9M
Jun 16, 2025 Jun 18, 2025 Lewis William CEO Sell 12.5 -135,009 -18.67% ✓ $13.6M
Jun 16, 2025 Jun 18, 2025 Adsett Roger COO Sell 23.8 -10,686 -7.56% ✓ $1.1M
Jun 10, 2025 Jun 12, 2025 Flammer Martina M.D. Chief Medical Officer Sell 10.0 -45,163 -21.37% ✓ $4.1M
Jun 10, 2025 Jun 12, 2025 Schaeffer Orlov S Nicole Chief People Strategy Officer Sell 12.5 -137,472 -16.20% ✓ $12.7M
Jun 10, 2025 Jun 12, 2025 Bonstein Sara CFO Sell 3.8 -57,766 -35.84% ✓ $5.1M
Jun 5, 2025 Jun 6, 2025 Smith Michael Alexander Chief Legal Officer Sell 41.3 -1,879 -2.70% ✓ $138.1K
Jun 3, 2025 Jun 4, 2025 Smith Michael Alexander Chief Legal Officer Sell 42.5 -1,448 -2.04% ✗ $103.5K
Jun 3, 2025 Jun 4, 2025 Flammer Martina M.D. Chief Medical Officer Sell 42.5 -1,686 -1.99% ✗ $120.5K
Jun 3, 2025 Jun 4, 2025 Adsett Roger COO Sell 42.5 -1,860 -1.30% ✗ $133K
Jun 3, 2025 Jun 4, 2025 Bonstein Sara CFO Sell 42.5 -1,579 -1.37% ✗ $112.9K
Jun 3, 2025 Jun 4, 2025 Schaeffer Orlov S Nicole Chief People Strategy Officer Sell 42.5 -1,642 -1.37% ✗ $117.4K
Jun 3, 2025 Jun 4, 2025 MCGIRR DAVID W J Director Sell 30.0 -6,250 -6.01% ✓ $451.5K
Jun 2, 2025 Jun 4, 2025 Lewis William CEO Sell 38.8 -12,302 -2.03% ✓ $878.3K
May 30, 2025 Jun 3, 2025 Smith Michael Alexander Chief Legal Officer Sell 5.0 -26,327 -27.04% ✓ $1.8M
May 27, 2025 May 29, 2025 SHAROKY MELVIN MD Director Neutral 52.5 -200 -0.06% ✗ -
May 20, 2025 May 22, 2025 SHAROKY MELVIN MD Director Neutral 52.5 - 0.00% ✗ -
May 20, 2025 May 22, 2025 Desjardins Clarissa Director Buy 87.5 +3,025 4.51% ✗ $201.7K
May 20, 2025 May 22, 2025 Lewis William CEO Sell 32.5 -27,887 -4.45% ✓ $1.9M
May 15, 2025 May 19, 2025 Bonstein Sara CFO Neutral 85.0 +6,508 6.01% ✗ -
May 15, 2025 May 19, 2025 Adsett Roger COO Neutral 82.5 +6,508 4.76% ✗ -
May 15, 2025 May 19, 2025 Schaeffer Orlov S Nicole Chief People Strategy Officer Neutral 82.5 +5,578 4.87% ✗ -
May 15, 2025 May 19, 2025 Lewis William CEO Neutral 82.5 +22,314 3.74% ✗ -
May 15, 2025 May 19, 2025 Flammer Martina M.D. Chief Medical Officer Sell 30.0 -5,216 -5.79% ✓ $771.3K
May 15, 2025 May 19, 2025 Smith Michael Alexander Chief Legal Officer Neutral 85.0 +5,578 6.08% ✗ -
May 15, 2025 May 19, 2025 Brennan David R Director Neutral 82.5 +5,058 4.15% ✗ -
May 15, 2025 May 19, 2025 SCHAFER CAROL Director Neutral 85.0 +5,058 8.68% ✗ -
May 15, 2025 May 19, 2025 Desjardins Clarissa Director Neutral 85.0 +5,058 8.16% ✗ -
May 15, 2025 May 19, 2025 SHAROKY MELVIN MD Director Neutral 77.5 +5,058 1.42% ✗ -
May 15, 2025 May 19, 2025 ANDERSON ELIZABETH M Director Neutral 85.0 +5,058 7.37% ✗ -
May 15, 2025 May 19, 2025 MCGIRR DAVID W J Director Neutral 85.0 +5,058 5.11% ✗ -
May 15, 2025 May 19, 2025 LEE LEO Director Neutral 82.5 +5,058 4.06% ✗ -
May 13, 2025 May 15, 2025 Smith Michael Alexander Chief Legal Officer Sell 40.0 -4,816 -4.98% ✗ $325.7K
May 13, 2025 May 15, 2025 Schaeffer Orlov S Nicole Chief People Strategy Officer Sell 40.0 -6,235 -5.16% ✗ $420.1K
May 13, 2025 May 15, 2025 Lewis William CEO Sell 37.5 -21,213 -3.43% ✗ $1.4M
May 13, 2025 May 15, 2025 Flammer Martina M.D. Chief Medical Officer Sell 40.0 -10,152 -10.14% ✗ $684.6K
May 13, 2025 May 15, 2025 Bonstein Sara CFO Sell 40.0 -10,504 -8.84% ✗ $708.7K
May 13, 2025 May 15, 2025 Adsett Roger COO Sell 40.0 -9,407 -6.44% ✗ $633.7K
May 14, 2025 May 15, 2025 SHAROKY MELVIN MD Director Neutral 52.5 - 0.00% ✗ -
May 1, 2025 May 2, 2025 Lewis William CEO Sell 42.5 -6,830 -1.09% ✓ $495.7K
Apr 15, 2025 Apr 16, 2025 Lewis William CEO Sell 42.5 -6,830 -1.09% ✓ $479.2K
Apr 1, 2025 Apr 3, 2025 Lewis William CEO Sell 42.5 -6,830 -1.09% ✓ $502.6K
Mar 17, 2025 Mar 19, 2025 Lewis William CEO Sell 32.5 -25,580 -3.97% ✓ $2M
Mar 3, 2025 Mar 5, 2025 Lewis William CEO Sell 32.5 -25,580 -3.97% ✓ $2M