INSM insider trading — Insmed Inc
Over the last 90 days, insiders at Insmed Inc (INSM) made 0 open-market purchases worth $0 and 3 open-market sales worth $35.70M, making them net sellers by $35.70M. The largest sale was by Adsett Roger (Chief Operating Officer), who sold 239,850 shares for $31.96M on Aug 10, 2026.
Updated Oct 16, 2026.
Recent INSM insider transactions
Every Form 4 filed by Insmed Inc officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Sep 9, 2026 | Brennan David R | Director | S · Sale | Direct | 25,000 | $124.00 | $3.10M | Form 4 |
| Aug 17, 2026 | Sharoky Melvin Md | Director | S · Sale | Indirect | 5,000 | $127.53 | $638K | Form 4 |
| Aug 10, 2026 | Adsett Roger | Chief Operating Officer | M · Option exercise | Direct | 239,850 | $20.45 | $4.91M | Form 4 |
| Aug 10, 2026 | Adsett Roger | Chief Operating Officer | S · Sale | Direct | 239,850 | $133.27 | $31.96M | Form 4 |
| Aug 6, 2026 | Flammer Martina M.D. | Chief Medical Officer | M · Option exercise · 10b5-1 | Direct | 27,173 | $21.20 | $576K | Form 4 |
| Aug 6, 2026 | Flammer Martina M.D. | Chief Medical Officer | S · Sale · 10b5-1 | Direct | 27,173 | $128.61 | $3.49M | Form 4 |
| Jul 23, 2026 | Lewis William | Chair and CEO | M · Option exercise · 10b5-1 | Direct | 10,700 | $24.94 | $267K | Form 4 |
| Jul 23, 2026 | Lewis William | Chair and CEO | S · Sale · 10b5-1 | Direct | 10,700 | $106.06 | $1.13M | Form 4 |
INSM insider trading FAQ
Are insiders buying INSM stock?
Not on the open market. In the last 90 days, Insmed Inc insiders made no open-market purchases, and 3 open-market sales totaling $35.70M. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading INSM?
Recent sellers: Adsett Roger, Brennan David R, Sharoky Melvin Md.
Where does INSM insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.