Robert W. Duggan

Companies

• Summit TherapeuticsBoard member Sep 18, 2020 to now¹
• PULSE BIOSCIENCES, INC.Board member Nov 6, 2017 to now²
• Summit TherapeuticsChief executive officer Oct 6, 2020 to Aug 18, 2022³
• Summit TherapeuticsOfficer Sep 18, 2020 to Sep 18, 2020¹
• PharmacyclicsChief executive officer Aug 4, 2009 to May 28, 2015⁴
• PharmacyclicsChair Aug 4, 2009 to May 28, 2015⁴
• Intuitive SurgicalBoard member Mar 16, 2006 to May 19, 2011⁵
• PharmacyclicsBoard member Sep 19, 2007 to Dec 15, 2008⁶

Holdings

Stock this person has reported owning, from the forms officers and directors file with the SEC. See the biggest insider stakes.

Shares held

• STSummit Therapeutics SMMT584,083,655 shares⁷$9.2B at $15.77Jun 12, 2026
• PBPULSE BIOSCIENCES, INC. PLSE48,820,236 shares⁸$2.3B at $47.44May 15, 2026

As of each latest filing. The line shows shares held over time.

Recent filings

• Jun 12, 2026Bought 3,810,000 shares at $13.12 of Summit Therapeutics⁷
• Jun 4, 2026Bought 100,000 shares at $14.60 of Summit Therapeutics⁹
• May 11, 2026Bought 660,233 shares at $19.69 of PULSE BIOSCIENCES, INC.⁸
• May 11, 2026Bought 660,233 shares at $19.69 of PULSE BIOSCIENCES, INC.¹⁰
• Oct 21, 2025Bought 26,680 shares at $18.74 of Summit Therapeutics¹¹
• Oct 21, 2025Granted 266,808 shares at $18.74 of Summit Therapeutics¹¹
• Oct 21, 2025Granted 13,980,789 shares at $18.74 of Summit Therapeutics¹¹
• Sep 11, 2025Bought 5,000 shares at $18.07 of Summit Therapeutics¹²
• Sep 10, 2025Bought 333,394 shares at $17.68 of Summit Therapeutics¹²
• Sep 10, 2025Bought 34,659 shares at $14.66 of PULSE BIOSCIENCES, INC.¹³
• May 30, 2025Exercised options 74,545 shares at $2.64 of Summit Therapeutics¹⁴
• Apr 8, 2025Exercised 3,985,055 shares at $1.58 of Summit Therapeutics¹⁵
• Dec 18, 2024Exercised 49,312 shares at $11.00 of PULSE BIOSCIENCES, INC.¹⁶
• Dec 18, 2024Exercised 69,020 shares at $11.00 of PULSE BIOSCIENCES, INC.¹⁶
• Dec 18, 2024Exercised 5,187,824 shares at $11.00 of PULSE BIOSCIENCES, INC.¹⁶
• Dec 13, 2024Bought 55,256 shares at $17.18 of PULSE BIOSCIENCES, INC.¹⁷
• Dec 12, 2024Bought 45,404 shares at $17.13 of PULSE BIOSCIENCES, INC.¹⁸
• Dec 11, 2024Bought 50,000 shares at $17.42 of PULSE BIOSCIENCES, INC.¹⁹
• Dec 11, 2024Bought 6,054 shares at $16.74 of PULSE BIOSCIENCES, INC.¹⁹
• Sep 12, 2024Bought 145,140 shares at $14.41 of PULSE BIOSCIENCES, INC.¹³
• Sep 11, 2024Bought 12,800 shares at $14.77 of PULSE BIOSCIENCES, INC.¹³
• Sep 11, 2024Granted 3,325,991 shares at $22.70 of Summit Therapeutics²⁰
• Jul 3, 2024Exercised 49,312 shares of PULSE BIOSCIENCES, INC.²¹
• Jul 3, 2024Exercised 69,020 shares of PULSE BIOSCIENCES, INC.²¹
• Jul 3, 2024Exercised 5,187,824 shares of PULSE BIOSCIENCES, INC.²¹