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Summit Therapeutics Inc.

SMMT Net buying
CIK 0001599298 #943 in the set updated 17 Sep 2026
Bought (12 mo)
$114.62M
out of their own pocket, the only kind of buying there is
Sold (12 mo)
$0.00
$0.00 on a plan · $0.00 straight out of an exercise
Sold at will
$0.00
0 of 0 sales
Net
+$114.62M
+$114.62M against sales at will

By person

5 insiders · 9 transactions
Insider
Role
Bought
Sold
Net
Holding
Of company
Worth
Change
DUGGAN ROBERT W
Co-Chief Executive Officer
$51.95M (3)
—
+$51.95M
599,708,353
75.18%
$7.87B
+3.9%
Zanganeh Mahkam
Co-Chief Executive Officer
$51.95M (3)
—
+$51.95M
573,883,879
71.94%
$7.53B
+4.2%
Xia Yu
Director
$10.00M (1)
—
+$10.00M
32,057,147
4.02%
$420.59M
+1.7%
Soni Manmeet Singh
COO and CFO
$722.25K (2)
—
+$722.25K
3,123,603
0.3916%
$40.98M
+3.4%
Anand Bhaskar
Chief Accounting Officer
—
—
—
159,751
0.0200%
$2.10M
+20.0%

Individual transactions

9
Insider
Date
Role
Action
Shares
Price
Amount
DUGGAN ROBERT W
12 Jun 2026
Co-Chief Executive Officer
Buy
3,810,000
$13.12
$49.99M
Zanganeh Mahkam
12 Jun 2026
Co-Chief Executive Officer
Buy indirect
3,810,000
$13.12
$49.99M
Soni Manmeet Singh
4 Jun 2026
COO and CFO
Buy
25,000
$14.43
$360.75K
Soni Manmeet Singh
4 Jun 2026
COO and CFO
Buy
25,000
$14.46
$361.50K
Zanganeh Mahkam
4 Jun 2026
Co-Chief Executive Officer
Buy indirect
100,000
$14.60
$1.46M
DUGGAN ROBERT W
4 Jun 2026
Co-Chief Executive Officer
Buy indirect
100,000
$14.60
$1.46M
Zanganeh Mahkam
21 Oct 2025
Co-Chief Executive Officer
Buy indirect
26,680
$18.74
$499.98K
DUGGAN ROBERT W
21 Oct 2025
Co-Chief Executive Officer
Buy indirect
26,680
$18.74
$499.98K
Xia Yu
21 Oct 2025
Director
Buy indirect
533,617
$18.74
$10.00M

What was left out

Form 4 filings counted 20
Amendments (4/A) skipped 0
Filings about a different issuer 0
Unreadable filings 0
Joint filings 0
Sales on a Rule 10b5-1 plan 0
Sales straight out of an exercise 0
Sales at will 0
Transactions with no price 0
Shares from compensation/vesting 28,575,235
History held since 6 Oct 2020