// company-profile
Summit Therapeutics Inc.
SMMT// activity-summary
Recent insider activity is bullish. Over the last 30 days, 6 insiders purchased shares (net $103.6M). Buying was led by DUGGAN ROBERT W.
// 90-day insight
Over the last 90 days, Summit Therapeutics Inc. insiders bought $103.6M across 6 transactions with no open-market sales.
- Most active insider: DUGGAN ROBERT W with 2 transactions totaling $51.4M.
- Largest single purchase: $50.0M by DUGGAN ROBERT W on Jun 12, 2026.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of Summit Therapeutics Inc. as of 2026-03-31
Data source: SEC Form 13F-HR filings. 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 |
|---|---|---|---|---|---|---|
| Jun 12, 2026 | DUGGAN ROBERT W | SMMT | Purchase | 3,810,000 | $13.12 | $49.99M |
| Jun 12, 2026 | Zanganeh Mahkam | SMMT | Purchase | 3,810,000 | $13.12 | $49.99M |
| Jun 4, 2026 | Soni Manmeet Singh | SMMT | Purchase | 25,000 | $14.46 | $362K |
| Jun 4, 2026 | DUGGAN ROBERT W | SMMT | Purchase | 100,000 | $14.60 | $1.46M |
| Jun 4, 2026 | Soni Manmeet Singh | SMMT | Purchase | 25,000 | $14.43 | $361K |
45 more transactions hidden
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