William Lewis, Chair and CEO at INSMED Inc (INSM), sold 13,283 shares at $116.18 ($1.5M) on 2026-05-13, disclosed to the SEC on 2026-05-15.
Seasonal sale ($1.5M) by Chair and CEO — this insider has traded INSM in May in at least three consecutive prior years. Pattern-driven, low signal.
Negative factors outweigh the positive ones.
| Filing → |
| INSM | SELL | 2026-06-26 | $2.2M | — | Filing → |
| INSM | SELL | 2026-06-10 | $613K | — | Filing → |
| INSM | SELL | 2026-06-05 | $778K | — | Filing → |