SMMT
insider transactionsSummit Therapeutics Inc. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
Cluster buy signal: Multiple insiders at the same company buying around the same time — often a stronger signal than a single buy. 3 different insiders made open-market purchases in the last 30 days, totalling $103.6M.
Net shares · 30d
+7.9M
7.9M buy · 0 sell
Net value · 30d
$103.6M
$103.6M in · $0 out
Sentiment · 30d
Net buying
100% buying · 0% selling
Open-market trades · 30d
6
7.9M buy · 0 sell
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
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Buy·P
Mahkam Zanganeh KEY
Co-Chief Executive Officer
$50.0M
3.8M sh · $13.12
Own +1%
-
Buy·P
Robert W Duggan KEY
Co-Chief Executive Officer
$50.0M
3.8M sh · $13.12
Own +1%
-
Grant·A
Director, 10% Owner
$0
12.5K sh
Own New
-
Grant·A
Director, 10% Owner
$0
30.0K sh
Own New
-
Buy·P
Mahkam Zanganeh KEY
Co-Chief Executive Officer
$1.5M
100.0K sh · $14.60
Own +0%
-
Buy·P
COO and CFO
$360.8K
25.0K sh · $14.43
Own +1%
-
Buy·P
COO and CFO
$361.5K
25.0K sh · $14.46
Own +1%
-
Buy·P
Robert W Duggan KEY
Co-Chief Executive Officer
$1.5M
100.0K sh · $14.60
Own +0%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| Jun 12, 2026 | Mahkam Zanganeh KEY | Buy P | 3.8M | $50.0M |
| Jun 12, 2026 | Robert W Duggan KEY | Buy P | 3.8M | $50.0M |
| Jun 11, 2026 | Robert W Duggan | Grant A | 12.5K | $0 |
| Jun 11, 2026 | Robert W Duggan | Grant A | 30.0K | $0 |
| Jun 4, 2026 | Mahkam Zanganeh KEY | Buy P | 100.0K | $1.5M |
| Jun 4, 2026 | Manmeet Singh Soni KEY | Buy P | 25.0K | $360.8K |
| Jun 4, 2026 | Manmeet Singh Soni KEY | Buy P | 25.0K | $361.5K |
| Jun 4, 2026 | Robert W Duggan KEY | Buy P | 100.0K | $1.5M |
About SMMT insider trading
This page tracks insider transactions for Summit Therapeutics Inc. (SMMT) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.