MarketPeel
Insider Trading Intelligence
Pricing
…
RD

Robert W. Duggan

SMMT
CO-CHIEF EXECUTIVE OFFICER · SUMMIT THERAPEUTICS INC. · CIK 0001055919
FILING MIX · LIFETIME85%/15%
BUYS
92
SELLS
16
TOTAL VALUE
$1.25B
COMPANIES
2
ACTIVE SINCE
May 2020
HOLDINGS NOW
573,896,374
AVG SELL PX
—
TRADE KIND
SHOWING 108 / 108
Trades · vs SPY
Loading price series…
Performance · forward returns vs SPY
38 backtested trades · 8 horizons · 18 pendingHow are these numbers computed? →
Forward-return performance of every backtestable P/S trade by Robert W. Duggan, measured at 8 horizons from 7 days to 2 years. Deduped per economic event so co-filings count once. Excess return = trade return minus SPY return over the same window.
HORIZONTRADESWIN RATEINSIDER RETURNSPY RETURNMEAN EXCESSMEDIAN EXCESST-STAT
7d38+78.95%+10.76%+0.23%+10.53%+6.96%4.15
14d38+81.58%+17.95%+1.11%+16.41%+18.27%4.97
30d38+68.42%+15.89%+1.53%+14.36%+15.46%3.79
60d38(1 pending)+59.46%+14.04%+5.24%+8.80%-0.53%1.89
90d38(1 pending)+59.46%+15.17%+6.64%+8.52%+4.69%1.68
180d38(1 pending)+83.78%+29.46%+10.73%+18.73%+14.21%3.62
1y38(5 pending)+75.76%+79.80%+24.37%+55.42%+63.44%4.27
2y38(10 pending)+82.14%+152.58%+41.45%+111.12%-3.08%—
How to read this: Insider Returnis the average raw return of the filer's trades over the horizon. SPY Return is what SPY did over those same windows — reference only, not a comparison. The headline alpha number is Mean Excess = Insider − SPY; green means the filer beat SPY, red means they trailed it. Win rate is the share of individual trades where the filer beat SPY. T-statvalues above 2 mean the alpha is unlikely to be chance given the sample size. "Pending" counts trades where the horizon hasn't elapsed yet; their stats are not included in the row average.
Holdings over time
SMMT · 573,883,879 shares · as of Jun 12, 2026
0143,470,970286,941,940430,412,909573,883,879202120222023202420252026SHARES HELD
Trading cadence · quarterly flow
BUY ● SELL ●
2020
2020
2020
2021
2021
2021
2021
2022
2022
2022
2022
2023
2023
2023
2023
2024
2024
2024
2024
2025
2025
2025
2025
2026
2026
FLOW · 92 buys / 16 sellsCOVERAGE · 25 quarters
Form 4 filings · all activity
COMPANYTYPESHARESPRICEVALUEHELD AFTERTRADE DATEFILEDDETAILS
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASE
Co-Chief Executive Officer
3,810,000$13.12$49.99M573,883,879Jun 12, 2026Jun 12, 2026 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
12,495——12,495Jun 11, 2026Jun 15, 2026 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
30,000——30,000Jun 11, 2026Jun 15, 2026 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASE
Co-Chief Executive Officer
100,000$14.60$1.46M25,824,474Jun 4, 2026Jun 4, 2026 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
660,233$19.69$13.00M48,211,433May 11, 2026May 11, 2026 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
660,233$19.69$13.00M48,370,047May 11, 2026May 15, 2026 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASEGRANT
Stock grant
11,232$8.76$98.4K11,232Jan 2, 2026Jan 6, 2026 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASEGRANT
Stock grant
13,980,789$18.74$262.00M570,073,879Oct 21, 2025Oct 23, 2025 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASE
Co-Chief Executive Officer
26,680$18.74$500.0K76,680Oct 21, 2025Oct 23, 2025 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASEGRANT
Stock grant
266,808$18.74$5.00M25,724,474Oct 21, 2025Oct 23, 2025 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASE
Co-Chief Executive Officer
5,000$18.07$90.3K556,093,090Sep 11, 2025Sep 11, 2025 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASE
Co-Chief Executive Officer
333,394$17.68$5.89M556,088,090Sep 10, 2025Sep 11, 2025 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
34,659$14.66$508.1K47,551,200Sep 10, 2025Sep 12, 2025 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
20,792——20,792Aug 15, 2025Aug 19, 2025 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
30,000——30,000Aug 15, 2025Aug 19, 2025 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASE
Co-Chief Executive Officer
74,545$2.64$196.8K555,754,696May 30, 2025Jun 2, 2025 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
SALE
Co-Chief Executive Officer
74,545——0May 30, 2025Jun 2, 2025 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASEGRANT
Stock grant
9,590,558——9,590,558Apr 29, 2025May 1, 2025 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASEGRANT
Stock grant
1,040,000——1,040,000Apr 29, 2025May 1, 2025 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASEGRANT
Stock grant
400,000——400,000Apr 29, 2025May 1, 2025 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASE
Co-Chief Executive Officer
3,985,055$1.58$6.30M555,680,151Apr 8, 2025Apr 9, 2025 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASE
Co-Chief Executive Officer
3,985,055——0Apr 8, 2025Apr 9, 2025 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASEGRANT
Stock grant
10,724$9.18$98.4K10,724Jan 2, 2025Jan 6, 2025 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
SALE
24,656——0Dec 18, 2024Dec 18, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
69,020$11.00$759.2K630,109Dec 18, 2024Dec 18, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
5,187,824$11.00$57.07M47,516,541Dec 18, 2024Dec 18, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
SALE
2,593,912——0Dec 18, 2024Dec 18, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
49,312$11.00$542.4K450,189Dec 18, 2024Dec 18, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
SALE
34,510——0Dec 18, 2024Dec 18, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
55,256$17.18$949.3K42,328,717Dec 13, 2024Dec 17, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
6,054$16.74$101.3K42,178,057Dec 11, 2024Dec 13, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
50,000$17.42$871.0K42,228,057Dec 11, 2024Dec 13, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
145,140$14.41$2.09M47,709,140Sep 12, 2024Sep 12, 2025 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
12,800$14.77$189.1K47,564,000Sep 11, 2024Sep 12, 2025 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASEGRANT
Stock grant
3,325,991$22.70$75.50M551,695,096Sep 11, 2024Sep 13, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
49,312——400,877Jul 3, 2024Jul 9, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
5,187,824——42,172,003Jul 3, 2024Jul 9, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
69,020——561,089Jul 3, 2024Jul 9, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
2,593,912——2,593,912Jul 3, 2024Jul 9, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
24,656——24,656Jul 3, 2024Jul 9, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
34,510——34,510Jul 3, 2024Jul 9, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
20,000——20,000Jun 6, 2024Jun 24, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
16,247——16,247Jun 6, 2024Jun 24, 2024 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASEGRANT
Stock grant
74,545$1.32$98.4K74,545Jan 2, 2024Jan 4, 2024 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
17,999$9.15$164.7K36,984,179Dec 12, 2023Dec 14, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
90,118$9.36$843.5K36,966,180Dec 11, 2023Dec 13, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
116,656$9.54$1.11M36,876,062Dec 8, 2023Dec 12, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
74,852$9.19$687.9K36,759,406Dec 7, 2023Dec 11, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
9,933$5.95$59.1K36,601,741Dec 6, 2023Dec 8, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
82,813$9.06$750.3K36,684,554Dec 6, 2023Dec 8, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
SALE
9,933——0Dec 6, 2023Dec 8, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
66,021$9.34$616.6K351,565Dec 5, 2023Dec 7, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
SALE
20,347——0Dec 4, 2023Dec 6, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
20,000$10.66$213.2K36,571,461Dec 4, 2023Dec 6, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
SALE
20,000——0Dec 4, 2023Dec 6, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
27,000$10.38$280.3K285,544Dec 4, 2023Dec 6, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
20,347$10.66$216.9K36,591,808Dec 4, 2023Dec 6, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
45,600$9.07$413.6K258,544Dec 1, 2023Dec 5, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
152,944$9.06$1.39M212,944Nov 30, 2023Dec 4, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
60,000$9.21$552.6K60,000Nov 29, 2023Dec 1, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
SALE
1,667——10,000Nov 29, 2023Dec 1, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
1,667$5.95$9.9K36,392,861Nov 29, 2023Dec 1, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
158,600$9.44$1.50M36,551,461Nov 29, 2023Dec 1, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
124,397$8.98$1.12M36,391,194Nov 28, 2023Nov 30, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
241$6.10$1.5K36,246,797Nov 17, 2023Nov 20, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
10,000$6.11$61.1K36,266,797Nov 17, 2023Nov 20, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
10,000$6.09$60.9K36,256,797Nov 17, 2023Nov 20, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
SALE
3,333——11,667Nov 7, 2023Nov 9, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
SALE
9,932——29,799Nov 7, 2023Nov 9, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
3,333$5.95$19.8K36,236,624Nov 7, 2023Nov 9, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
9,932$5.95$59.1K36,246,556Nov 7, 2023Nov 9, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
1,667$5.95$9.9K36,233,291Aug 25, 2023Aug 28, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
SALE
1,667——15,000Aug 25, 2023Aug 28, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
SALE
1,667——16,667Jul 25, 2023Jul 27, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
1,667$5.95$9.9K36,231,624Jul 25, 2023Jul 27, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
SALE
5,683,163——0Jun 14, 2023Jun 16, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
SALE
81,025——0Jun 14, 2023Jun 16, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
81,025$2.05$166.1K492,069Jun 14, 2023Jun 16, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
5,683,163$2.05$11.65M36,097,824Jun 14, 2023Jun 16, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
20,000——20,000May 25, 2023Jun 6, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
39,731——39,731May 25, 2023Jun 6, 2023 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
10,022,937$6.51$65.25M30,414,661May 9, 2023May 10, 2023 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASE
Chief Executive Officer
376,489,880$1.05$395.31M552,354,161Mar 6, 2023Mar 8, 2023 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASE
Chief Executive Officer
9,346,434——171,879,226Dec 6, 2022Dec 8, 2022 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASE
Chief Executive Officer
94,849,203$0.97$92.00M162,532,792Aug 16, 2022Aug 18, 2022 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
5,683,163——20,391,724Jun 9, 2022Jun 10, 2022 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
81,025——81,025Jun 9, 2022Jun 10, 2022 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
81,025——411,044Jun 9, 2022Jun 10, 2022 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
5,683,163——5,683,163Jun 9, 2022Jun 10, 2022 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASE
Chief Executive Officer
21,135——67,683,589May 23, 2022May 25, 2022 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
110,467——110,467May 19, 2022May 23, 2022 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
20,000——20,000May 19, 2022May 23, 2022 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
3,048,780$16.40$50.00M14,708,561Jun 30, 2021Jul 2, 2021 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
20,000——20,000May 20, 2021May 21, 2021 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
11,605——11,605May 20, 2021May 21, 2021 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASE
Chief Executive Officer
11,365,921$5.24$59.56M67,662,454May 12, 2021May 14, 2021 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
376,065$7.01$2.64M11,659,781Dec 29, 2020Dec 30, 2020 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
8,214$7.01$57.6K330,019Dec 29, 2020Dec 30, 2020 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
SALE
8,214——0Dec 29, 2020Dec 30, 2020 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
SALE
376,065——0Dec 29, 2020Dec 30, 2020 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASE
Chief Executive Officer
14,071,856$3.34$47.00M56,296,533Nov 6, 2020Nov 9, 2020 ↗View →
SMMT
SUMMIT THERAPEUTICS INC.
PURCHASEGRANT
Stock grant
9,730,539——9,730,539Oct 2, 2020Oct 6, 2020 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
8,214——8,214Jun 15, 2020Jun 17, 2020 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
376,065——376,065Jun 15, 2020Jun 17, 2020 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
54,761$7.01$383.9K321,805Jun 15, 2020Jun 17, 2020 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASE
2,507,112$7.01$17.57M11,283,716Jun 15, 2020Jun 17, 2020 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
20,000——20,000May 18, 2020May 19, 2020 ↗View →
PLSE
PULSE BIOSCIENCES, INC.
PURCHASEGRANT
Stock grant
20,347——20,347May 18, 2020May 19, 2020 ↗View →
Other insiders · SMMT
Loading peer insiders…
About this filer
CIK 0001055919
ROLE
Co-Chief Executive Officer
PRIMARY
SMMT
COMPANIES
2
ACTIVE SINCE
May 2020
MARKETPEEL · /INSIDER/0001055919DATA · SEC EDGAR · FORM 4 · CONSOLIDATED TAPE
FREE · DAILY · 6 AM ET

The morning brief, before the bell.

One short email. Insider buys, congressional trades, and plain-English analysis.

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