// company-profile
INSMED Inc Insider Trading
INSMEvery SEC Form 4 insider trading filing for INSMED Inc (INSM) — open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC.
curl "https://api.form4api.com/v1/transactions?ticker=INSM" -H "X-Api-Key: YOUR_API_KEY"// activity-summary
Mixed insider activity over the last 30 days: 0 purchases and 0 sales (0 transactions total).
// 90-day insight
Over the last 90 days, INSMED Inc insiders bought $0 (2 transactions) and sold $1.7M (5 transactions).
- Most active insider: Lewis William with 29 transactions totaling $8.7M.
- Largest single sale: $2.4M by Flammer Martina M.D. on Aug 6, 2026.
- 80% of recent sales were pre-scheduled 10b5-1 trades — typically less informative than open-market activity.
Activity skews bearish — sales outpace buys.
Institutional Ownership
Top 13F-HR holders of INSMED Inc as of 2026-06-30
Data source: quarterly 13F-HR filings — institutional holders report positions within 45 days of quarter end. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Aug 6, 2026 | Flammer Martina M.D. | INSM | Sale10b5 | 18,278 | $129.40 | $2.37M |
| Aug 6, 2026 | Flammer Martina M.D. | INSM | Sale10b5 | 8,895 | $127.00 | $1.13M |
| Aug 6, 2026 | Flammer Martina M.D. | INSM | Option Exercise10b5 | 18,278 | $0.00 | $0K |
| Aug 6, 2026 | Flammer Martina M.D. | INSM | Option Exercise10b5 | 8,895 | $25.83 | $230K |
| Aug 6, 2026 | Flammer Martina M.D. | INSM | Option Exercise10b5 | 18,278 | $18.95 | $346K |
45 more transactions hidden
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