Stuart Poulton Karyopharm Therapeutics Inc. (KPTI) insider trading activity

Stuart Poulton is EVP, Chief Development Officer of Karyopharm Therapeutics Inc.. Currently has a direct ownership of 27,710 shares of KPTI, which is worth approximately $173,464. The most recent transaction as insider was on Sep 15, 2025, when has been sold 401 shares (Common Stock) at a price of $6.43 per share, resulting in proceeds of $2,578. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 27.7K

1.08% 3M change

91.52% 12M change

Total Value Held $173,464

Stuart Poulton Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Sep 15 2025	SELL Open market or private sale	$2,578 $6.43 p/Share	401 Reduced 1.43%	27,710 Common Stock
Sep 12 2025	BUY Grant, award, or other acquisition	-	888 Added 3.06%	28,111 Common Stock
Jul 29 2025	SELL Open market or private sale	$834 $4.37 p/Share	191 Reduced 0.7%	27,223 Common Stock
Mar 04 2025	SELL Open market or private sale	$22,316 $6.29 p/Share	3,548 Reduced 11.46%	27,414 Common Stock
Feb 28 2025	BUY Grant, award, or other acquisition	-	9,583 Added 23.64%	30,962 Common Stock
Feb 18 2025	SELL Open market or private sale	$3,725 $0.63 p/Share	5,914 Reduced 1.81%	320,714 Common Stock
Jul 30 2024	SELL Open market or private sale	$3,055 $1.06 p/Share	2,883 Reduced 0.87%	326,628 Common Stock
Mar 01 2024	SELL Open market or private sale	$7,386 $1.2 p/Share	6,155 Reduced 1.83%	329,511 Common
Feb 29 2024	SELL Open market or private sale	$19,083 $1.17 p/Share	16,311 Reduced 4.63%	335,666 Common
Feb 28 2024	BUY Grant, award, or other acquisition	-	188,205 Added 34.84%	351,977 Common Stock
Feb 15 2024	SELL Open market or private sale	$8,010 $1.37 p/Share	5,847 Reduced 3.45%	163,772 Common Stock
Jan 24 2024	BUY Grant, award, or other acquisition	-	13,333 Added 7.29%	169,619 Common Stock
Jul 28 2023	SELL Open market or private sale	$4,836 $1.7 p/Share	2,845 Reduced 1.79%	156,286 Common Stock
Feb 28 2023	BUY Grant, award, or other acquisition	-	95,000 Added 37.38%	159,131 Common Stock
Feb 15 2023	SELL Open market or private sale	$18,722 $3.19 p/Share	5,869 Reduced 8.38%	64,131 Common Stock

Stuart Poulton

EVP, Chief Development Officer

Newton, MA

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