United States Biotechnology & Medical Research

Summit Therapeutics Inc (SMMT)

Track

Track

Summit Therapeutics Inc. recorded significant insider trading activity during June 2026, with multiple executives purchasing shares. Co-CEOs Robert Duggan and Mahkam Zanganeh, alongside COO Manmeet Singh Soni, executed these acquisitions. As the most recent transactions occurred over three months ago, no current market performance analysis is provided regarding these historical equity movements.
Ticker: SMMT Exchange: NMS
Preparing chart...
Download chart Copy chart image Copy link Share to X Share


• Purchase • Sale • Planned purchase • Planned sale Net purchase Net sale Buy signal Sell signal Earnings
Upgrade for signal details

Upgrade to see score, net flow, insiders and context.

Upgrade to see full signal details →

Insider trades have triggered activity signals for Summit Therapeutics Inc. Upgrade to see score, net flow, insiders and the full signal context.

Open in Activity Signals screener →
Top insiders
Trades
Abbreviations B: Buy, S: Sell, PP: Planned purchase, PlS: Planned sale, PrS: Proposed sale, O: Option / Other
4.2
Zanganeh Mahkam Co-Chief Executive Officer Executive Director Large shareholder
Transaction date
Purchase
Price
489.16
Quantity 89,351 -24.0%
Value US$3,169,518
4.3
DUGGAN ROBERT W Co-Chief Executive Officer Executive Director Large shareholder
Transaction date
Purchase
Price
469.68
Quantity 25,195 -20.7%
Value US$3,067,907
4.3
DUGGAN ROBERT W Co-Chief Executive Officer Executive Director Large shareholder
Transaction date
Purchase
Price
215.87
Quantity 46,835 +7.9%
Value US$2,737,097
4.2
Zanganeh Mahkam Co-Chief Executive Officer Executive Director Large shareholder
Transaction date
Purchase
Price
14.60
Quantity 100,000 +0.4%
Value US$1,460,000
3.7
Soni Manmeet Singh COO and CFO Executive Director
Transaction date
Purchase
Price
14.43
Quantity 25,000 +0.8%
Value US$360,750
3.7
Soni Manmeet Singh COO and CFO Executive Director
Transaction date
Purchase
Price
14.46
Quantity 25,000 +0.8%
Value US$361,500
0.7
Xia Yu Non-Executive Director
Transaction date
Purchase
Price
18.74
Quantity 533,617 +1.7%
Value US$9,999,983
4.3
DUGGAN ROBERT W Co-Chief Executive Officer Executive Director Large shareholder
Transaction date
Purchase
Price
18.74
Quantity 26,680 +53.4%
Value US$499,983
4.2
Zanganeh Mahkam Co-Chief Executive Officer Executive Director Large shareholder
Transaction date
Purchase
Price
18.74
Quantity 26,680 +53.4%
Value US$499,983
4.3
DUGGAN ROBERT W Co-Chief Executive Officer Executive Director Large shareholder
Transaction date
Purchase
Price
18.07
Quantity 5,000 +0.0%
Value US$90,350
4.2
Zanganeh Mahkam Co-Chief Executive Officer Executive Director Large shareholder
Transaction date
Purchase
Price
18.07
Quantity 5,000 +0.0%
Value US$90,350
4.3
DUGGAN ROBERT W Co-Chief Executive Officer Executive Director Large shareholder
Transaction date
Purchase
Price
17.68
Quantity 333,394 +0.1%
Value US$5,894,406
4.2
Zanganeh Mahkam Co-Chief Executive Officer Executive Director Large shareholder
Transaction date
Purchase
Price
17.68
Quantity 333,394 +0.1%
Value US$5,894,406
4.2
Zanganeh Mahkam Chief Executive Officer Executive Director
Transaction date
Purchase
Price
3.71
Quantity 20,000 +66.7%
Value US$74,200
4.2
Zanganeh Mahkam Chief Executive Officer Executive Director
Transaction date
Purchase
Price
3.72
Quantity 34,321 +0.1%
Value US$127,674
4.2
Zanganeh Mahkam Chief Executive Officer Executive Director
Transaction date
Purchase
Price
3.72
Quantity 26,000 +5.3%
Value US$96,720
3.9
Dhingra Ankur Chief Financial Officer Officer
Transaction date
Purchase
Price
3.75
Quantity 100,000 +39.2%
Value US$375,000
4.2
Zanganeh Mahkam Chief Executive Officer Executive Director
Transaction date
Purchase
Price
3.75
Quantity 30,000 +inf%
Value US$112,500
3.9
Dhingra Ankur Chief Financial Officer Officer
Transaction date
Purchase
Price
2.17
Quantity 19,700 +8.4%
Value US$42,749
3.9
Dhingra Ankur Chief Financial Officer Officer
Transaction date
Purchase
Price
2.15
Quantity 700 +0.3%
Value US$1,505
4.2
Zanganeh Mahkam Chief Executive Officer Executive Director
Transaction date
Purchase
Price
2.07
Quantity 5,000 +1.0%
Value US$10,350
3.7
Soni Manmeet Singh Chief Operating Officer Executive Director
Transaction date
Purchase
Price
1.68
Quantity 2,976,190 +inf%
Value US$4,999,999
4.2
Zanganeh Mahkam Co-Chief Executive Officer Executive Director
Transaction date
Purchase
Price
1.05
Quantity 6,748,629 +215.2%
Value US$7,086,060
4.2
Zanganeh Mahkam Co-Chief Executive Officer Executive Director
Transaction date
Purchase
Price
1.05
Quantity 804,672 +215.2%
Value US$844,906
4.2
Zanganeh Mahkam Co-Chief Executive Officer Executive Director
Transaction date
Purchase
Price
1.05
Quantity 15,973,743 +215.2%
Value US$16,772,430
3.9
Dhingra Ankur Chief Financial Officer Officer
Transaction date
Purchase
Price
1.05
Quantity 196,362 +514.1%
Value US$206,180
4.3
DUGGAN ROBERT W Chief Executive Officer Executive Director
Transaction date
Purchase
Price
1.05
Quantity 376,489,880 +214.1%
Value US$395,314,374
4.2
Zanganeh Maky Co-CEO & President Executive Director
Transaction date
Purchase
Price
0.97
Quantity 1,030,925 +49.0%
Value US$999,997
4.2
Zanganeh Maky Co-CEO & President Executive Director
Transaction date
Purchase
Price
0.97
Quantity 4,593,777 +186.2%
Value US$4,455,964
4.2
Zanganeh Maky Co-CEO & President Executive Director
Transaction date
Purchase
Price
0.97
Quantity 184,430 +105.1%
Value US$178,897
4.3
DUGGAN ROBERT W Chief Executive Officer Executive Director
Transaction date
Purchase
Price
0.97
Quantity 94,849,203 +140.1%
Value US$92,003,727
3.9
Dhingra Ankur Chief Financial Officer Officer
Transaction date
Purchase
Price
0.97
Quantity 24,658 +182.1%
Value US$23,918
3.9
Dhingra Ankur Chief Financial Officer Officer
Transaction date
Purchase
Price
0.97
Quantity 11,557 +43.6%
Value US$11,210
4.2
Zanganeh Maky Chief Operating Officer Executive Director
Transaction date
Purchase
Price
5.24
Quantity 389,077 +17.3%
Value US$2,038,763
4.3
DUGGAN ROBERT W Chief Executive Officer Executive Director Large shareholder
Transaction date
Purchase
Price
5.24
Quantity 11,365,921 +20.2%
Value US$59,557,426
0.9
Powell David Jonathan Chief Scientific Officer Officer
Transaction date
Sale
Price
4.44
Quantity 13,713 -100.0%
Value US$60,886
0.9
Powell David Jonathan Chief Scientific Officer Officer
Transaction date
Sale
Price
4.39
Quantity 29,569 -100.0%
Value US$129,808
0.9
Powell David Jonathan Chief Scientific Officer Officer
Transaction date
Sale
Price
4.32
Quantity 12,070 -100.0%
Value US$52,142
0.9
Powell David Jonathan Chief Scientific Officer Officer
Transaction date
Sale
Price
4.21
Quantity 11,374 -100.0%
Value US$47,885
0.9
Powell David Jonathan Chief Scientific Officer Officer
Transaction date
Sale
Price
4.40
Quantity 6,987 -100.0%
Value US$30,743
4.3
DUGGAN ROBERT W Chief Executive Officer Executive Director Large shareholder
Transaction date
Purchase
Price
3.34
Quantity 14,071,856 +33.3%
Value US$46,999,999
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value 		Number of shares Price Value Details
2026-06-12 2026-06-12 B Purchase
4.2
Zanganeh Mahkam

Co-Chief Executive Officer

Executive Director Large shareholder
89,351 -24.0%
489.16
US$3,169,518 		89,351 -24.0% 489.16 US$3,169,518
2026-06-12 2026-06-12 B Purchase
4.3
DUGGAN ROBERT W

Co-Chief Executive Officer

Executive Director Large shareholder
25,195 -20.7%
469.68
US$3,067,907 		25,195 -20.7% 469.68 US$3,067,907
2026-06-04 2026-06-04 B Purchase
4.3
DUGGAN ROBERT W

Co-Chief Executive Officer

Executive Director Large shareholder
46,835 +7.9%
215.87
US$2,737,097 		46,835 +7.9% 215.87 US$2,737,097
2026-06-04 2026-06-04 B Purchase
4.2
Zanganeh Mahkam

Co-Chief Executive Officer

Executive Director Large shareholder
100,000 +0.4%
14.60
US$1,460,000 		100,000 +0.4% 14.60 US$1,460,000
2026-06-04 2026-06-04 B Purchase
3.7
Soni Manmeet Singh

COO and CFO

Executive Director
25,000 +0.8%
14.43
US$360,750 		25,000 +0.8% 14.43 US$360,750
2026-06-04 2026-06-04 B Purchase
3.7
Soni Manmeet Singh

COO and CFO

Executive Director
25,000 +0.8%
14.46
US$361,500 		25,000 +0.8% 14.46 US$361,500
2025-10-23 2025-10-21 B Purchase
0.7
Xia Yu
Non-Executive Director
533,617 +1.7%
18.74
US$9,999,983 		533,617 +1.7% 18.74 US$9,999,983
2025-10-23 2025-10-21 B Purchase
4.3
DUGGAN ROBERT W

Co-Chief Executive Officer

Executive Director Large shareholder
26,680 +53.4%
18.74
US$499,983 		26,680 +53.4% 18.74 US$499,983
2025-10-23 2025-10-21 B Purchase
4.2
Zanganeh Mahkam

Co-Chief Executive Officer

Executive Director Large shareholder
26,680 +53.4%
18.74
US$499,983 		26,680 +53.4% 18.74 US$499,983
2025-09-11 2025-09-11 B Purchase
4.3
DUGGAN ROBERT W

Co-Chief Executive Officer

Executive Director Large shareholder
5,000 +0.0%
18.07
US$90,350 		5,000 +0.0% 18.07 US$90,350
2025-09-11 2025-09-11 B Purchase
4.2
Zanganeh Mahkam

Co-Chief Executive Officer

Executive Director Large shareholder
5,000 +0.0%
18.07
US$90,350 		5,000 +0.0% 18.07 US$90,350
2025-09-11 2025-09-10 B Purchase
4.3
DUGGAN ROBERT W

Co-Chief Executive Officer

Executive Director Large shareholder
333,394 +0.1%
17.68
US$5,894,406 		333,394 +0.1% 17.68 US$5,894,406
2025-09-11 2025-09-10 B Purchase
4.2
Zanganeh Mahkam

Co-Chief Executive Officer

Executive Director Large shareholder
333,394 +0.1%
17.68
US$5,894,406 		333,394 +0.1% 17.68 US$5,894,406
2024-03-27 2024-03-27 B Purchase
4.2
Zanganeh Mahkam

Chief Executive Officer

Executive Director
20,000 +66.7%
3.71
US$74,200 		20,000 +66.7% 3.71 US$74,200
2024-03-27 2024-03-27 B Purchase
4.2
Zanganeh Mahkam

Chief Executive Officer

Executive Director
34,321 +0.1%
3.72
US$127,674 		34,321 +0.1% 3.72 US$127,674
2024-03-27 2024-03-27 B Purchase
4.2
Zanganeh Mahkam

Chief Executive Officer

Executive Director
26,000 +5.3%
3.72
US$96,720 		26,000 +5.3% 3.72 US$96,720
2024-03-27 2024-03-26 B Purchase
3.9
Dhingra Ankur

Chief Financial Officer

Officer
100,000 +39.2%
3.75
US$375,000 		100,000 +39.2% 3.75 US$375,000
2024-03-27 2024-03-26 B Purchase
4.2
Zanganeh Mahkam

Chief Executive Officer

Executive Director
30,000 +inf%
3.75
US$112,500 		30,000 +inf% 3.75 US$112,500
2023-12-13 2023-12-13 B Purchase
3.9
Dhingra Ankur

Chief Financial Officer

Officer
19,700 +8.4%
2.17
US$42,749 		19,700 +8.4% 2.17 US$42,749
2023-12-13 2023-12-13 B Purchase
3.9
Dhingra Ankur

Chief Financial Officer

Officer
700 +0.3%
2.15
US$1,505 		700 +0.3% 2.15 US$1,505
2023-12-13 2023-12-12 B Purchase
4.2
Zanganeh Mahkam

Chief Executive Officer

Executive Director
5,000 +1.0%
2.07
US$10,350 		5,000 +1.0% 2.07 US$10,350
2023-10-16 2023-10-13 B Purchase
3.7
Soni Manmeet Singh

Chief Operating Officer

Executive Director
2,976,190 +inf%
1.68
US$4,999,999 		2,976,190 +inf% 1.68 US$4,999,999
2023-03-08 2023-03-08 B Purchase
4.2
Zanganeh Mahkam

Co-Chief Executive Officer

Executive Director
6,748,629 +215.2%
1.05
US$7,086,060 		6,748,629 +215.2% 1.05 US$7,086,060
2023-03-08 2023-03-08 B Purchase
4.2
Zanganeh Mahkam

Co-Chief Executive Officer

Executive Director
804,672 +215.2%
1.05
US$844,906 		804,672 +215.2% 1.05 US$844,906
2023-03-08 2023-03-08 B Purchase
4.2
Zanganeh Mahkam

Co-Chief Executive Officer

Executive Director
15,973,743 +215.2%
1.05
US$16,772,430 		15,973,743 +215.2% 1.05 US$16,772,430
2023-03-08 2023-03-07 B Purchase
3.9
Dhingra Ankur

Chief Financial Officer

Officer
196,362 +514.1%
1.05
US$206,180 		196,362 +514.1% 1.05 US$206,180
2023-03-08 2023-03-06 B Purchase
4.3
DUGGAN ROBERT W

Chief Executive Officer

Executive Director
376,489,880 +214.1%
1.05
US$395,314,374 		376,489,880 +214.1% 1.05 US$395,314,374
2022-08-18 2022-08-16 B Purchase
4.2
Zanganeh Maky

Co-CEO & President

Executive Director
1,030,925 +49.0%
0.97
US$999,997 		1,030,925 +49.0% 0.97 US$999,997
2022-08-18 2022-08-16 B Purchase
4.2
Zanganeh Maky

Co-CEO & President

Executive Director
4,593,777 +186.2%
0.97
US$4,455,964 		4,593,777 +186.2% 0.97 US$4,455,964
2022-08-18 2022-08-16 B Purchase
4.2
Zanganeh Maky

Co-CEO & President

Executive Director
184,430 +105.1%
0.97
US$178,897 		184,430 +105.1% 0.97 US$178,897
2022-08-18 2022-08-16 B Purchase
4.3
DUGGAN ROBERT W

Chief Executive Officer

Executive Director
94,849,203 +140.1%
0.97
US$92,003,727 		94,849,203 +140.1% 0.97 US$92,003,727
2022-08-17 2022-08-16 B Purchase
3.9
Dhingra Ankur

Chief Financial Officer

Officer
24,658 +182.1%
0.97
US$23,918 		24,658 +182.1% 0.97 US$23,918
2022-08-17 2022-08-16 B Purchase
3.9
Dhingra Ankur

Chief Financial Officer

Officer
11,557 +43.6%
0.97
US$11,210 		11,557 +43.6% 0.97 US$11,210
2021-05-14 2021-05-12 B Purchase
4.2
Zanganeh Maky

Chief Operating Officer

Executive Director
389,077 +17.3%
5.24
US$2,038,763 		389,077 +17.3% 5.24 US$2,038,763
2021-05-14 2021-05-12 B Purchase
4.3
DUGGAN ROBERT W

Chief Executive Officer

Executive Director Large shareholder
11,365,921 +20.2%
5.24
US$59,557,426 		11,365,921 +20.2% 5.24 US$59,557,426
2020-12-01 2020-11-30 S Sale
0.9
Powell David Jonathan

Chief Scientific Officer

Officer
13,713 -100.0%
4.44
US$60,886 		13,713 -100.0% 4.44 US$60,886
2020-12-01 2020-11-27 S Sale
0.9
Powell David Jonathan

Chief Scientific Officer

Officer
29,569 -100.0%
4.39
US$129,808 		29,569 -100.0% 4.39 US$129,808
2020-11-25 2020-11-25 S Sale
0.9
Powell David Jonathan

Chief Scientific Officer

Officer
12,070 -100.0%
4.32
US$52,142 		12,070 -100.0% 4.32 US$52,142
2020-11-25 2020-11-24 S Sale
0.9
Powell David Jonathan

Chief Scientific Officer

Officer
11,374 -100.0%
4.21
US$47,885 		11,374 -100.0% 4.21 US$47,885
2020-11-25 2020-11-23 S Sale
0.9
Powell David Jonathan

Chief Scientific Officer

Officer
6,987 -100.0%
4.40
US$30,743 		6,987 -100.0% 4.40 US$30,743
2020-11-10 2020-11-06 B Purchase
4.3
DUGGAN ROBERT W

Chief Executive Officer

Executive Director Large shareholder
14,071,856 +33.3%
3.34
US$46,999,999 		14,071,856 +33.3% 3.34 US$46,999,999
Explore more

More insider trading research around Summit Therapeutics Inc

More insider trades in United States
Similar Healthcare companies with insider activity
More Pharmaceuticals & Medical Research companies with insider activity
More Biotechnology & Medical Research companies with insider activity
Insider trading in North America