Arnon Rosenthal Alector, Inc. (ALEC) insider trading activity

Arnon Rosenthal is Chief Executive Officer of Alector, Inc.. Currently has a direct ownership of 2.55 Million shares of ALEC, which is worth approximately $4.21 Million. The most recent transaction as insider was on Jul 01, 2025, when has been sold 137,125 shares (Common Stock) at a price of $0.0 per share, resulting in proceeds of $0. This information was disclosed in a Form 4 filing with the Securities and Exchange Commission (SEC).

Shares Held (Direct Ownership) 2.55M

3.45% 3M change

29.19% 12M change

Total Value Held $4.21 Million

Arnon Rosenthal Transaction History

Date	Transaction	Value	Shares Traded	Shares Held
Jul 01 2025	BUY Grant, award, or other acquisition	-	137,125 Added 5.1%	2,551,782 Common Stock
Jun 02 2025	SELL Open market or private sale	$69,796 $1.34 p/Share	52,087 Reduced 2.11%	2,414,657 Common Stock
Mar 03 2025	SELL Open market or private sale	$59,285 $1.47 p/Share	40,330 Reduced 1.61%	2,466,744 Common Stock
Dec 02 2024	SELL Open market or private sale	$131,473 $2.52 p/Share	52,172 Reduced 2.04%	2,507,074 Common Stock
Oct 01 2024	BUY Grant, award, or other acquisition	-	610,500 Added 19.26%	2,559,246 Common Stock
Sep 03 2024	SELL Open market or private sale	$129,315 $4.88 p/Share	26,499 Reduced 1.34%	1,948,746 Common Stock
Jun 03 2024	SELL Open market or private sale	$120,648 $4.8 p/Share	25,135 Reduced 1.26%	1,975,245 Common Stock
Mar 04 2024	SELL Open market or private sale	$130,352 $6.92 p/Share	18,837 Reduced 0.93%	2,000,380 Common Stock
Dec 04 2023	SELL Open market or private sale	$132,500 $5.56 p/Share	23,831 Reduced 1.17%	2,019,217 Common Stock
Oct 01 2023	BUY Grant, award, or other acquisition	-	397,600 Added 16.29%	2,043,048 Common Stock
Sep 05 2023	SELL Open market or private sale	$29,307 $5.19 p/Share	5,647 Reduced 0.34%	1,645,448 Common Stock
Jun 02 2023	SELL Open market or private sale	$36,259 $6.9 p/Share	5,255 Reduced 0.32%	1,651,095 Common Stock
Mar 17 2023	SELL Open market or private sale	$94,456 $6.22 p/Share	15,186 Reduced 0.91%	1,656,350 Common Stock
Mar 03 2023	BUY Grant, award, or other acquisition	-	42,990 Added 2.51%	1,671,536 Common Stock
Mar 02 2023	SELL Open market or private sale	$48,663 $8.32 p/Share	5,849 Reduced 0.36%	1,628,546 Common Stock
Oct 01 2022	BUY Grant, award, or other acquisition	-	179,169 Added 9.88%	1,634,395 Common Stock
May 07 2021	BUY Grant, award, or other acquisition	-	150,000 Added 9.34%	1,455,226 Common Stock

Arnon Rosenthal

Chief Executive Officer

South San Francisco, CA

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