Duggan Robert W insider trades
Duggan Robert W has filed 47 Form 4s with the SEC that we hold, for Pulse Biosciences, INC. (PLSE) (Director, 10% owner) and Summit Therapeutics Inc. (SMMT) (Co-Chief Executive Officer, Director, 10% owner). Across all of them we count 32 purchases worth $688.5M and 0 sales worth $0 reported on Form 4. In the last 12 months: 4 purchases ($64.9M) and 0 sales ($0). The largest single trade was a purchase of 376,489,880 shares of Summit Therapeutics Inc. worth $395.3M, dated 2023-03-06. The first filing on our record is dated 2021-07-02 and the latest 2026-06-15.
Pulse Biosciences, INC. (PLSE)
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2021-06-30 | P, purchase reported on Form 4 | 3,048,780 | $50.0M | 2021-07-02 |
| 2023-05-09 | P, purchase reported on Form 4 | 10,022,937 | $65.2M | 2023-05-10 |
| 2023-11-17 | P, purchase reported on Form 4 | 10,000 | $60.9K | 2023-11-20 |
| 2023-11-17 | P, purchase reported on Form 4 | 10,000 | $61.1K | 2023-11-20 |
| 2023-11-17 | P, purchase reported on Form 4 | 241 | $1.5K | 2023-11-20 |
| 2023-11-28 | P, purchase reported on Form 4 | 124,397 | $1.1M | 2023-11-30 |
| 2023-11-29 | P, purchase reported on Form 4 | 60,000 | $552.6K | 2023-12-01 |
| 2023-11-29 | P, purchase reported on Form 4 | 158,600 | $1.5M | 2023-12-01 |
| 2023-11-30 | P, purchase reported on Form 4 | 152,944 | $1.4M | 2023-12-04 |
| 2023-12-01 | P, purchase reported on Form 4 | 45,600 | $413.6K | 2023-12-05 |
| 2023-12-04 | P, purchase reported on Form 4 | 27,000 | $280.3K | 2023-12-06 |
| 2023-12-05 | P, purchase reported on Form 4 | 66,021 | $616.6K | 2023-12-07 |
| 2023-12-06 | P, purchase reported on Form 4 | 82,813 | $750.3K | 2023-12-08 |
| 2023-12-07 | P, purchase reported on Form 4 | 74,852 | $687.9K | 2023-12-11 |
| 2023-12-08 | P, purchase reported on Form 4 | 116,656 | $1.1M | 2023-12-12 |
| 2023-12-11 | P, purchase reported on Form 4 | 90,118 | $843.5K | 2023-12-13 |
| 2023-12-12 | P, purchase reported on Form 4 | 17,999 | $164.7K | 2023-12-14 |
| 2024-09-11 | P, purchase reported on Form 4 | 12,800 | $189.1K | 2025-09-12 |
| 2024-09-12 | P, purchase reported on Form 4 | 145,140 | $2.1M | 2025-09-12 |
| 2024-12-11 | P, purchase reported on Form 4 | 6,054 | $101.3K | 2024-12-13 |
| 2024-12-11 | P, purchase reported on Form 4 | 50,000 | $871.0K | 2024-12-13 |
| 2024-12-12 | P, purchase reported on Form 4 | 45,404 | $777.8K | 2024-12-17 |
| 2024-12-13 | P, purchase reported on Form 4 | 55,256 | $949.3K | 2024-12-17 |
| 2025-09-10 | P, purchase reported on Form 4 | 34,659 | $508.1K | 2025-09-12 |
| 2026-05-11 | P, purchase reported on Form 4 | 660,233 | $13.0M | 2026-05-15 |
Summit Therapeutics Inc. (SMMT)
| Trade date | Code | Shares | Value as filed | Filed |
|---|---|---|---|---|
| 2022-08-16 | P, purchase reported on Form 4 | 94,849,203 | $92.0M | 2022-08-18 |
| 2023-03-06 | P, purchase reported on Form 4 | 376,489,880 | $395.3M | 2023-03-08 |
| 2025-09-10 | P, purchase reported on Form 4 | 333,394 | $5.9M | 2025-09-11 |
| 2025-09-11 | P, purchase reported on Form 4 | 5,000 | $90.3K | 2025-09-11 |
| 2025-10-21 | P, purchase reported on Form 4 | 26,680 | $500.0K | 2025-10-23 |
| 2026-06-04 | P, purchase reported on Form 4 | 100,000 | $1.5M | 2026-06-04 |
| 2026-06-12 | P, purchase reported on Form 4 | 3,810,000 | $50.0M | 2026-06-12 |
Counted from the Form 4 filings this reporting owner (SEC CIK 1055919) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.
Source: U.S. Securities and Exchange Commission (EDGAR) and other official
government data · Updated 2026-10-12 ·
For informational purposes only, not investment advice.
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