Summit Therapeutics Insider Trades
NASDAQ: SMMTHealth CareBiotechnology: Pharmaceutical PreparationsUSD
At close: Oct 9, 4:00 PM ET · Delayed 15 min
Last 12 months
- Purchases
- 9 · $114.62M
- Sales
- 0 · $0
- Shares bought / sold
- 8.46M / 0
- Net activity
- Net buying $114.6 million
Summit Therapeutics insider activity
Over the last 12 months, Summit Therapeutics insiders reported 15 transactions on SEC Form 4: 9 open-market purchases and 0 sales. Insiders bought $114.6 million and sold $0 worth of stock, for net insider buying of $114.6 million. The most recent filing shows DUGGAN ROBERT W (Co-Chief Executive Officer) buying 3,810,000 shares at $13.12 on Jun 12, 2026.
Insider sales are common for compensation, tax and diversification reasons, while open-market purchases are rarer; tracking both helps put SMMT's ownership changes in context.
Summary generated from market data by MetaCap's automated system. Methodology
SMMT insider transactions
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| Jun 12, 2026 | Zanganeh MahkamCo-Chief Executive Officer | Buy | 3,810,000 | $49.99M | Form 4 |
| Jun 12, 2026 | DUGGAN ROBERT WCo-Chief Executive Officer | Buy | 3,810,000 | $49.99M | Form 4 |
| Jun 4, 2026 | Soni Manmeet SinghCOO and CFO | Buy | 25,000 | $360.75K | Form 4 |
| Jun 4, 2026 | Soni Manmeet SinghCOO and CFO | Buy | 25,000 | $361.50K | Form 4 |
| Jun 4, 2026 | Zanganeh MahkamCo-Chief Executive Officer | Buy | 100,000 | $1.46M | Form 4 |
| Jun 4, 2026 | DUGGAN ROBERT WCo-Chief Executive Officer | Buy | 100,000 | $1.46M | Form 4 |
| Oct 21, 2025 | Soni Manmeet SinghCOO and CFO | Award | 53,361 | $999.99K | Form 4 |
| Oct 21, 2025 | Anand BhaskarChief Accounting Officer | Award | 26,680 | $499.98K | Form 4 |
| Oct 21, 2025 | Xia YuDirector | Buy | 533,617 | $10.00M | Form 4 |
| Oct 21, 2025 | Zanganeh MahkamCo-Chief Executive Officer | Award | 13,980,789 | $262.00M | Form 4 |
| Oct 21, 2025 | Zanganeh MahkamCo-Chief Executive Officer | Buy | 26,680 | $499.98K | Form 4 |
| Oct 21, 2025 | Zanganeh MahkamCo-Chief Executive Officer | Award | 266,808 | $5.00M | Form 4 |
| Oct 21, 2025 | DUGGAN ROBERT WCo-Chief Executive Officer | Buy | 26,680 | $499.98K | Form 4 |
| Oct 21, 2025 | DUGGAN ROBERT WCo-Chief Executive Officer | Award | 266,808 | $5.00M | Form 4 |
| Oct 21, 2025 | DUGGAN ROBERT WCo-Chief Executive Officer | Award | 13,980,789 | $262.00M | Form 4 |
| Sep 11, 2025 | DUGGAN ROBERT WCo-Chief Executive Officer | Buy | 5,000 | $90.35K | Form 4 |
| Sep 11, 2025 | Zanganeh MahkamCo-Chief Executive Officer | Buy | 5,000 | $90.35K | Form 4 |
| Sep 10, 2025 | DUGGAN ROBERT WCo-Chief Executive Officer | Buy | 333,394 | $5.89M | Form 4 |
| Sep 10, 2025 | Zanganeh MahkamCo-Chief Executive Officer | Buy | 333,394 | $5.89M | Form 4 |
| May 30, 2025 | Zanganeh MahkamCo-Chief Executive Officer | Option exercise | 74,545 | $196.80K | Form 4 |
| May 30, 2025 | DUGGAN ROBERT WCo-Chief Executive Officer | Option exercise | 74,545 | $196.80K | Form 4 |
| Apr 8, 2025 | Zanganeh MahkamCo-Chief Executive Officer | Option exercise | 3,985,055 | $6.30M | Form 4 |
| Apr 8, 2025 | DUGGAN ROBERT WCo-Chief Executive Officer | Option exercise | 3,985,055 | $6.30M | Form 4 |
Transaction codes follow SEC Form 4: P = open-market purchase, S = open-market sale, A = grant or award, M = option exercise, F = shares withheld for taxes. About Form 4