Duggan Robert W (CIK 0001055919)

Latest company ownership

Shares held
10,230,776
Last filed at
Oct 23, 2025
Confidence Score
79.3
2025Q4
Confidence Score History
2020Q4 2025Q4
Shares held
24,656
Last filed at
Dec 18, 2024
Confidence Score
52.9
2025Q4
Confidence Score History
2017Q1 2025Q4

Recent buy/sell transactions

Exec date Filing date Company Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Oct 21, 2025 Oct 23, 2025 Summit Therapeutics Inc. CEO Buy 85.0 +14,274,277 2.41% $500K
Sep 10, 2025 Sep 12, 2025 PULSE BIOSCIENCES, INC. Director Buy 65.0 +192,599 0.13% $2.8M
Sep 10, 2025 Sep 11, 2025 Summit Therapeutics Inc. CEO Buy 66.3 +338,394 0.06% $6M
Dec 13, 2024 Dec 17, 2024 PULSE BIOSCIENCES, INC. Director Buy 62.5 +55,256 0.13% $949.3K
Dec 12, 2024 Dec 17, 2024 PULSE BIOSCIENCES, INC. Director Buy 62.5 +45,404 0.11% $777.8K
Dec 11, 2024 Dec 13, 2024 PULSE BIOSCIENCES, INC. Director Buy 62.5 +56,054 0.13% $972.3K
Dec 12, 2023 Dec 14, 2023 PULSE BIOSCIENCES, INC. Director Buy 52.5 +17,999 0.05% $164.7K
Dec 11, 2023 Dec 13, 2023 PULSE BIOSCIENCES, INC. Director Buy 67.5 +90,118 0.24% $843.5K
Dec 8, 2023 Dec 12, 2023 PULSE BIOSCIENCES, INC. Director Buy 70.0 +116,656 0.31% $1.1M
Dec 7, 2023 Dec 11, 2023 PULSE BIOSCIENCES, INC. Director Buy 62.5 +74,852 0.20% $687.9K
Dec 6, 2023 Dec 8, 2023 PULSE BIOSCIENCES, INC. Director Buy 67.5 +82,813 0.22% $750.3K
Dec 5, 2023 Dec 7, 2023 PULSE BIOSCIENCES, INC. Director Buy 62.5 +66,021 0.18% $616.6K
Dec 4, 2023 Dec 6, 2023 PULSE BIOSCIENCES, INC. Director Buy 97.5 +27,000 10.44% $280.3K
Dec 1, 2023 Dec 5, 2023 PULSE BIOSCIENCES, INC. Director Buy 62.5 +45,600 0.12% $413.6K
Nov 30, 2023 Dec 4, 2023 PULSE BIOSCIENCES, INC. Director Buy 70.0 +152,944 0.42% $1.4M
Nov 29, 2023 Dec 1, 2023 PULSE BIOSCIENCES, INC. Director Buy 77.5 +218,600 0.60% $2M
Nov 28, 2023 Nov 30, 2023 PULSE BIOSCIENCES, INC. Director Buy 70.0 +124,397 0.34% $1.1M
Nov 17, 2023 Nov 20, 2023 PULSE BIOSCIENCES, INC. Director Buy 60.0 +20,241 0.06% $123.5K
May 9, 2023 May 10, 2023 PULSE BIOSCIENCES, INC. Director Buy 100.0 +10,022,937 48.18% $65.2M
Mar 6, 2023 Mar 8, 2023 Summit Therapeutics Inc. CEO Buy 100.0 +376,489,880 214.08% $395.3M
Aug 16, 2022 Aug 18, 2022 Summit Therapeutics Inc. CEO Buy 100.0 +94,849,203 140.14% $92M
Jun 30, 2021 Jul 2, 2021 PULSE BIOSCIENCES, INC. Director Buy 100.0 +3,048,780 25.43% $50M
May 12, 2021 May 14, 2021 Summit Therapeutics Inc. CEO Buy 100.0 +11,365,921 20.19% $59.6M
Nov 6, 2020 Nov 10, 2020 Summit Therapeutics Inc. CEO Buy 100.0 +14,071,856 33.33% $47M
May 11, 2018 May 15, 2018 PULSE BIOSCIENCES, INC. Director Buy 67.5 +21,353 0.36% $494.5K
Dec 13, 2017 Dec 13, 2017 PULSE BIOSCIENCES, INC. Director Buy 67.5 +20,556 0.35% $461.3K
Oct 19, 2017 Oct 23, 2017 PULSE BIOSCIENCES, INC. 10% Owner Buy 67.5 +22,901 0.39% $521.9K
Sep 24, 2017 Sep 26, 2017 PULSE BIOSCIENCES, INC. 10% Owner Buy 100.0 +2,000,000 52.18% $30M
Sep 14, 2017 Sep 18, 2017 PULSE BIOSCIENCES, INC. 10% Owner Buy 100.0 +409,918 11.98% $5.9M
Aug 1, 2017 Aug 3, 2017 PULSE BIOSCIENCES, INC. 10% Owner Buy 96.3 +277,450 8.82% $6.4M
May 22, 2017 May 24, 2017 PULSE BIOSCIENCES, INC. 10% Owner Buy 92.5 +83,928 2.74% $2.3M
May 9, 2017 May 11, 2017 PULSE BIOSCIENCES, INC. 10% Owner Buy 85.0 +43,389 1.44% $912.9K
Apr 28, 2017 May 2, 2017 PULSE BIOSCIENCES, INC. 10% Owner Buy 92.5 +84,348 2.88% $2M
Apr 25, 2017 Apr 27, 2017 PULSE BIOSCIENCES, INC. 10% Owner Buy 85.0 +35,387 1.22% $877.4K
Apr 17, 2017 Apr 19, 2017 PULSE BIOSCIENCES, INC. 10% Owner Buy 100.0 +319,242 12.38% $7.8M
Apr 6, 2017 Apr 10, 2017 PULSE BIOSCIENCES, INC. 10% Owner Buy 95.0 +191,464 8.02% $3.8M
Mar 16, 2017 Mar 20, 2017 PULSE BIOSCIENCES, INC. 10% Owner Buy 95.0 +205,127 9.44% $4.8M
Feb 9, 2017 Feb 22, 2017 PULSE BIOSCIENCES, INC. 10% Owner Buy 85.0 +41,624 1.95% $484.5K