SMMT insider buying and SEC filings, explained
Summit Therapeutics Inc. · CIK 1599298
Tracked: Forms 3/4/5, 8-K, NT · All filings on sec.gov
Insider activity in the last 12 months
Bought
$103.6M
Insiders who bought
3
Sold (not marked 10b5-1)
$0
Planned sales (10b5-1)
$0
Insider purchases and sales, last 12 months
| Traded | Type | What was filed | Source |
|---|---|---|---|
| Jun 12, 2026 | Purchase (code P) | Mahkam Zanganeh (CEO and Director) bought 3,810,000 shares indirectly (by spouse) at $13.12 ($50.0M), reported as a purchase (code P). Holdings by spouse up 1% to 573,883,879 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 12, 2026 |
| Jun 12, 2026 | Purchase (code P) | Robert W. Duggan (CEO and Director) bought 3,810,000 shares at $13.12 ($50.0M), reported as a purchase (code P). Holdings up 1% to 573,883,879 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 12, 2026 |
| Jun 4, 2026 | Purchase (code P) | Manmeet Singh Soni (CFO and Director) bought 50,000 shares at about $14.45 ($722K), reported as a purchase (code P). Holdings up 2% to 3,123,603 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 4, 2026 |
| Jun 4, 2026 | Purchase (code P) | Mahkam Zanganeh (CEO and Director) bought 100,000 shares indirectly (by trust) at $14.60 ($1.5M), reported as a purchase (code P). Holdings by trust up <1% to 25,824,474 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 4, 2026 |
| Jun 4, 2026 | Purchase (code P) | Robert W. Duggan (CEO and Director) bought 100,000 shares indirectly (by trust) at $14.60 ($1.5M), reported as a purchase (code P). Holdings by trust up <1% to 25,824,474 shares. Not marked as a 10b5-1 plan trade. | SEC filing Filed Jun 4, 2026 |
10 routine transactions (such as grants, option exercises or tax withholding) are not listed.
Cluster buys
3 insiders bought in 30 days
$103.6M in purchases since Jun 4, 2026 · Purchases traded Jun 4, 2026 to Jun 12, 2026 · Closed
| Insider | Value | Traded | Source |
|---|---|---|---|
| Robert W. Duggan (CEO) | $1.5M | Jun 4, 2026 | SEC filing |
| Mahkam Zanganeh (CEO) | $1.5M | Jun 4, 2026 | SEC filing |
| Manmeet Singh Soni (CFO) | $722K | Jun 4, 2026 | SEC filing |
| Robert W. Duggan (CEO) | $50.0M | Jun 12, 2026 | SEC filing |
| Mahkam Zanganeh (CEO) | $50.0M | Jun 12, 2026 | SEC filing |
Red flags
No red flags in the last 12 months.
Key events
No key events in the last 12 months.
8-K filings, last 12 months
No 8-K filings in the last 12 months.
Red flags are objective triggers only: the item or form filed, never an opinion.
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