Alector, Inc. — Director's Dealing 2023

Mar 3, 2023

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Alector, Inc. (ALEC)
CIK: 0001653087
Period of Report: 2023-03-02

Reporting Person: Rosenthal Arnon (Director, Chief Executive Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2023-03-02	Common Stock	S	5849	$8.3178	Disposed	1628546	Direct

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	1972875	Indirect
Common Stock	652500	Indirect
Common Stock	652500	Indirect
Common Stock	652500	Indirect

Footnotes

F1: The reported shares were sold to satisfy the reporting person's tax obligations in connection with the vesting of restricted stock units, or RSUs.

F2: The reported securities are held directly by The Rosenthal Family Revocable Trust Dated November 4, 1994, as restated on June 9, 1999, for which the Reporting Person serves as trustee.

F3: The reported securities are held directly by the Adi Rosenthal 2007 Trust dated March 27, 2007, for which the Reporting Person serves as trustee.

F4: The reported securities are held directly by the Noam Rosenthal 2007 Trust dated March 27, 2007, for which the Reporting Person serves as trustee.

F5: The reported securities are held directly by the Shani Rosenthal 2007 Trust dated March 27, 2007, for which the Reporting Person serves as trustee.