SMMT
Zanganeh Mahkam, SMMT's CEO, spent $49.99M of their own money on 3.81M shares at $13, growing their stake 1%. Their tracked buys have a 50% win rate.
+$49.99M
3.81M sh @ $13
SMMT
Summit Therapeutics Inc.
SEC CIK 1599298
$14.09
−2.3% · 90 days
90-day buys
$103.62M
6 open-market
90-day sells
$0
0 open-market
Net insider flow
+$103.62M
Net buying
Filings shown
21
Most recent
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At a glance
Over the last 90 days, insiders at SMMT have bought a net $103.62M of stock (6 open-market buys vs 0 sells).
Largest recent trade: Zanganeh Mahkam, SMMT's CEO, spent $49.99M of their own money on 3.81M shares at $13, growing their stake 1%. Their tracked buys have a 50% win rate.
Most active filer: Zanganeh Mahkam, with 8 transactions among the recent filings shown.
Insider transaction history
Form 4 filings for SMMT, newest firstSMMT
Duggan Robert W, SMMT's CEO, spent $49.99M of their own money on 3.81M shares at $13, growing their stake 1%. Their tracked buys have a 58% win rate.
+$49.99M
3.81M sh @ $13
SMMT
Duggan Robert W, SMMT's CEO, spent $1.46M of their own money on 100,000 shares at $15. Their tracked buys have a 58% win rate.
+$1.46M
100,000 sh @ $15
SMMT
Zanganeh Mahkam, SMMT's CEO, spent $1.46M of their own money on 100,000 shares at $15. Their tracked buys have a 50% win rate.
+$1.46M
100,000 sh @ $15
SMMT
Soni Manmeet Singh, SMMT's CFO, spent $361.5K of their own money on 25,000 shares at $14, growing their stake 1%.
+$361.5K
25,000 sh @ $14
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SMMT
Soni Manmeet Singh, SMMT's CFO, spent $360.8K of their own money on 25,000 shares at $14, growing their stake 1%.
+$360.8K
25,000 sh @ $14
SMMT
Xia Yu, SMMT's Director, spent $10M of their own money on 533,617 shares at $19, growing their stake 2%.
+$10M
533,617 sh @ $19
SMMT
+$500K
26,680 sh @ $19
SMMT
+$1,000K
53,361 sh @ $19
SMMT
+$262M
13.98M sh @ $19
SMMT
+$5M
266,808 sh @ $19
SMMT
Duggan Robert W, SMMT's CEO, spent $500K of their own money on 26,680 shares at $19, growing their stake 53%. Their tracked buys have a 58% win rate.
+$500K
26,680 sh @ $19
SMMT
+$5M
266,808 sh @ $19
SMMT
Zanganeh Mahkam, SMMT's CEO, spent $500K of their own money on 26,680 shares at $19, growing their stake 53%. Their tracked buys have a 50% win rate.
+$500K
26,680 sh @ $19
SMMT
+$262M
13.98M sh @ $19
SMMT
Zanganeh Mahkam, SMMT's CEO, spent $90.4K of their own money on 5,000 shares at $18. Their tracked buys have a 50% win rate.
+$90.4K
5,000 sh @ $18
SMMT
Duggan Robert W, SMMT's CEO, spent $90.4K of their own money on 5,000 shares at $18. Their tracked buys have a 58% win rate.
+$90.4K
5,000 sh @ $18
SMMT
Zanganeh Mahkam, SMMT's CEO, spent $5.89M of their own money on 333,394 shares at $18. Their tracked buys have a 50% win rate.
+$5.89M
333,394 sh @ $18
SMMT
Duggan Robert W, SMMT's CEO, spent $5.89M of their own money on 333,394 shares at $18. Their tracked buys have a 58% win rate.
+$5.89M
333,394 sh @ $18
SMMT
+$196.8K
74,545 sh @ $3
SMMT
+$196.8K
74,545 sh @ $3
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About SMMT insider activity
This page tracks every recent Form 4 filed for Summit Therapeutics Inc. with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.
The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.
Frequently asked questions
How often is SMMT insider data updated?
Continuously. We read from SEC EDGAR, so new Form 4 filings for Summit Therapeutics Inc. usually appear here within minutes of being accepted by the SEC.
What does "net insider flow" mean?
It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.
Why do some rows show grants or option exercises instead of buys?
Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.
Is this investment advice?
No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.