Robert W Duggan Summit Therapeutics Inc. (SMMT) insider trading activity

Robert W Duggan is Co-Chief Executive Officer of Summit Therapeutics Inc.. Currently has a direct ownership of 570 Million shares of SMMT, which is worth approximately $10.4 Billion. The most recent transaction as insider was on Oct 21, 2025, when has been sold 13,980,789 shares (Common Stock) at a price of $18.74 per share, resulting in proceeds of $261,999,985. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 570M

2.58% 3M change

3.33% 12M change

Total Value Held $10.4 Billion

ROBERT W DUGGAN Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Oct 21 2025	BUY Grant, award, or other acquisition	$261,999,985 $18.74 p/Share	13,980,789 Added 2.39%	570,073,879 Common Stock
Sep 11 2025	BUY Open market or private purchase	$90,350 $18.07 p/Share	5,000 Added 0.0%	556,093,090 Common Stock
Sep 10 2025	BUY Open market or private purchase	$5,894,405 $17.68 p/Share	333,394 Added 0.06%	556,088,090 Common Stock
May 30 2025	BUY Exercise of conversion of derivative security	$196,798 $2.64 p/Share	74,545 Added 0.01%	555,754,696 Common Stock
Apr 08 2025	BUY Exercise of in-the-money or at-the-money derivatives securities	$6,296,386 $1.58 p/Share	3,985,055 Added 0.71%	555,680,151 Common Stock
Sep 11 2024	BUY Grant, award, or other acquisition	$75,499,995 $22.7 p/Share	3,325,991 Added 0.6%	551,695,096 Common Stock
Mar 06 2023	BUY Open market or private purchase	$395,314,374 $1.05 p/Share	376,489,880 Added 40.53%	552,354,161 Common Stock
Dec 06 2022	BUY Other acquisition or disposition	-	9,346,434 Added 5.16%	171,879,226 Common Stock
Aug 16 2022	BUY Open market or private purchase	$92,003,730 $0.97 p/Share	94,849,203 Added 36.85%	162,532,792 Common Stock
May 23 2022	BUY Other acquisition or disposition	-	21,135 Added 0.03%	67,683,589 Common Stock
May 12 2021	BUY Open market or private purchase	$59,557,423 $5.24 p/Share	11,365,921 Added 14.38%	67,662,454 Common Stock
Nov 06 2020	BUY Open market or private purchase	$46,999,998 $3.34 p/Share	14,071,856 Added 20.0%	56,296,533 Common Stock

Also insider at

PLSE

Pulse Biosciences, Inc. Healthcare

Director

RWD

Robert W Duggan

Co-Chief Executive Officer

Clearwater, FL

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