Alector Ownership & Insider Activity

Alector (ALEC) institutional and insider ownership, recent insider transactions and ownership breakdown.

Insiders own 8.1% of shares outstanding. Institutional investors hold 23.0%. Over the past 90 days, insiders made 3 sales worth $296K.

Shares Outstanding

111.657M

Shares Float

105.435M

Insider Shares Owned

9.042M

Insider % Owned

8.1%

Institutional Shares Held

25.705M

Institutional % Held

23.0%

Ownership Breakdown

Net Insider Activity by Month

Purchases (90d)

Sales (90d)

$296K total

Net Activity

Net Selling

Net Value (90d)

-$296K

Alector Insider Transactions (Last 6 Months)

Date	Insider	Title	Type	Shares	Price	Value
Sep 3, 2026	Lindsay Neil Berkley	CFO & CHIEF BUSINESS OFFICER	SELL	29.251K	$2.66	$78K
Sep 3, 2026	Arnon Rosenthal	CHIEF EXECUTIVE OFFICER	SELL	72.606K	$2.66	$193K
Sep 2, 2026	Grace Wong-Sarad	PRINCIPAL ACCOUNTING OFFICER	SELL	9.446K	$2.61	$25K
Jun 2, 2026	Arnon Rosenthal	CHIEF EXECUTIVE OFFICER	SELL	87.216K	$1.97	$172K
Jun 2, 2026	Grace Wong-Sarad	PRINCIPAL ACCOUNTING OFFICER	SELL	9.184K	$1.94	$18K
Jun 2, 2026	Lindsay Neil Berkley	CFO & CHIEF BUSINESS OFFICER	SELL	19.360K	$1.97	$38K
Apr 16, 2026	Grace Wong-Sarad	PRINCIPAL ACCOUNTING OFFICER	SELL	1.820K	$2.65	$5K