Robert W. Duggan, Co-Chief Executive Officer, actively bought shares on the open market in the last year, with no sales recorded. He purchased Pulse Biosciences ($PLSE) shares once for about $508 thousand, most recently on September 10, 2025, ranking 805th among 4,983 insiders for purchase value. He also bought Summit Therapeutics ($SMMT) shares three times for nearly $6.5 million, latest on October 21, 2025, ranking 142nd—well above the average insider purchase of $1.5 million across 3.3 transactions.
| Transaction Date | Company | Ticker | Insider Name | Title | Transaction Type | Security | Shares | Price | Shares Owned Following | Total Shares Outstanding | % of Owned | % of Outstanding |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Jan. 2, 2026 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Co-Chief Executive Officer | A | Stock Option (right to buy) | 11232 | $8.76 | 11,232.0000 | 744,442,538 | 9999.99% | 0.00% |
| Oct. 21, 2025 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Co-Chief Executive Officer | A | Common Stock | 266808 | $18.74 | 606,105,809.0000 | 744,442,538 | 0.04% | 0.04% |
| Oct. 21, 2025 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Co-Chief Executive Officer | A | Common Stock | 13980789 | $18.74 | 606,105,809.0000 | 744,442,538 | 2.36% | 1.88% |
| Oct. 21, 2025 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Co-Chief Executive Officer | P | Common Stock | 26680 | $18.74 | 606,105,809.0000 | 744,442,538 | 0.00% | 0.00% |
| Sept. 12, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | P | Common Stock | 145140 | $14.41 | 48,789,438.0000 | 0 | 0.30% | 0.00% |
| Sept. 10, 2025 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | P | Common Stock | 34659 | $14.66 | 48,631,498.0000 | 67,273,800 | 0.07% | 0.05% |
| Sept. 11, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | P | Common Stock | 12800 | $14.77 | 48,644,298.0000 | 0 | 0.03% | 0.00% |
| Sept. 10, 2025 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Co-Chief Executive Officer | P | Common Stock | 333394 | $17.68 | 591,826,532.0000 | 737,679,704 | 0.06% | 0.05% |
| Sept. 11, 2025 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Co-Chief Executive Officer | P | Common Stock | 5000 | $18.07 | 591,831,532.0000 | 737,679,704 | 0.00% | 0.00% |
| Aug. 15, 2025 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | A | Stock Option (right to buy) | 30000 | $0.00 | 30,000.0000 | 67,273,800 | 9999.99% | 0.04% |
| Aug. 15, 2025 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | A | Stock Option (right to buy) | 20792 | $0.00 | 20,792.0000 | 67,273,800 | 9999.99% | 0.03% |
| May 30, 2025 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Co-Chief Executive Officer | M | Common Stock | 74545 | $2.64 | 591,493,138.0000 | 737,679,704 | 0.01% | 0.01% |
| May 30, 2025 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Co-Chief Executive Officer | M | Stock Option (right to buy) | 74545 | $0.00 | 0.0000 | 737,679,704 | 100.00% | 0.01% |
| April 29, 2025 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Co-Chief Executive Officer | A | Stock Option (right to buy) | 1040000 | $0.00 | 1,040,000.0000 | 737,679,704 | 9999.99% | 0.14% |
| April 29, 2025 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Co-Chief Executive Officer | A | Stock Option (right to buy) | 400000 | $0.00 | 400,000.0000 | 737,679,704 | 9999.99% | 0.05% |
| April 29, 2025 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Co-Chief Executive Officer | A | Stock Option (right to buy) | 9590558 | $0.00 | 9,590,558.0000 | 737,679,704 | 9999.99% | 1.30% |
| April 8, 2025 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Co-Chief Executive Officer | X | Common Stock | 3985055 | $1.58 | 591,418,593.0000 | 737,679,704 | 0.68% | 0.54% |
| April 8, 2025 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Co-Chief Executive Officer | X | Warrant (right to buy) | 3985055 | $0.00 | 0.0000 | 737,679,704 | 0.00% | 0.54% |
| Jan. 2, 2025 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Co-Chief Executive Officer | A | Stock Option (right to buy) | 10724 | $9.18 | 14,617,245.0000 | 0 | 0.07% | 0.00% |
| Dec. 18, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Not found | X | Warrants (right to buy) | 24656 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Dec. 18, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Not found | X | Warrants (right to buy) | 24656 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Dec. 18, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Not found | X | Common Stock | 69020 | $11.00 | 48,596,839.0000 | 0 | 0.14% | 0.00% |
| Dec. 18, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Not found | X | Common Stock | 49312 | $11.00 | 48,596,839.0000 | 0 | 0.10% | 0.00% |
| Dec. 18, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Not found | X | Warrants (right to buy) | 2593912 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Dec. 18, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Not found | X | Warrants (right to buy) | 2593912 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Dec. 18, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Not found | X | Warrants (right to buy) | 34510 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Dec. 18, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Not found | X | Warrants (right to buy) | 34510 | $0.00 | 0.0000 | 0 | 100.00% | 0.00% |
| Dec. 18, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Not found | X | Common Stock | 5187824 | $11.00 | 48,596,839.0000 | 0 | 11.95% | 0.00% |
| Dec. 13, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | P | Common Stock | 55256 | $17.18 | 43,290,683.0000 | 0 | 0.13% | 0.00% |
| Dec. 12, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Not found | P | Common Stock | 45404 | $17.13 | 43,235,427.0000 | 0 | 0.11% | 0.00% |
| Dec. 11, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | P | Common Stock | 50000 | $17.42 | 43,190,023.0000 | 0 | 0.12% | 0.00% |
| Dec. 11, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | P | Common Stock | 6054 | $16.74 | 43,140,023.0000 | 0 | 0.01% | 0.00% |
| Sept. 11, 2024 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Co-Chief Executive Officer | A | Common Stock | 3325991 | $22.70 | 551,695,096.0000 | 0 | 0.61% | 0.00% |
| July 3, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | P | Warrant (right to buy) | 24656 | $0.00 | 2,653,078.0000 | 0 | 0.94% | 0.00% |
| July 3, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | X | Common Stock | 69020 | $0.00 | 43,133,969.0000 | 0 | 0.16% | 0.00% |
| July 3, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | X | Common Stock | 5187824 | $0.00 | 43,133,969.0000 | 0 | 13.67% | 0.00% |
| July 3, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | P | Warrant (right to buy) | 2593912 | $0.00 | 2,653,078.0000 | 0 | 4384.13% | 0.00% |
| July 3, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | P | Warrant (right to buy) | 2593912 | $0.00 | 2,653,078.0000 | 0 | 4384.13% | 0.00% |
| July 3, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | P | Warrant (right to buy) | 34510 | $0.00 | 2,653,078.0000 | 0 | 1.32% | 0.00% |
| July 3, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | P | Warrant (right to buy) | 34510 | $0.00 | 2,653,078.0000 | 0 | 1.32% | 0.00% |
| July 3, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | P | Warrant (right to buy) | 24656 | $0.00 | 2,653,078.0000 | 0 | 0.94% | 0.00% |
| July 3, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | X | Common Stock | 49312 | $0.00 | 43,133,969.0000 | 0 | 0.11% | 0.00% |
| June 6, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | A | Stock Option (right to buy) | 16247 | $0.00 | 16,247.0000 | 0 | 9999.99% | 0.00% |
| June 6, 2024 | PULSE BIOSCIENCES, INC. | $PLSE | DUGGAN ROBERT W | Director | A | Stock Option (right to buy) | 20000 | $0.00 | 20,000.0000 | 0 | 9999.99% | 0.00% |
| Jan. 2, 2024 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Co-Chief Executive Officer | A | Stock Option (right to buy) | 74545 | $1.32 | 74,545.0000 | 0 | 9999.99% | 0.00% |
| March 6, 2023 | Summit Therapeutics Inc. | $SMMT | DUGGAN ROBERT W | Chief Executive Officer | P | Common Stock | 376489880 | $1.05 | 552,354,161.0000 | 0 | 214.08% | 0.00% |