Sara Kenkare-Mitra - 01 Jul 2025 Form 4 Insider Report for Alector, Inc. (ALEC)

Role: President and Head of R&D
Signature: /s/ Grace Wong-Sarad, by power of attorney
Issuer symbol: ALEC
Transactions as of: 01 Jul 2025
Net transactions value: $0
Form type: 4
Filing time: 01 Jul 2025, 17:00:12 UTC
Previous filing: 04 Jun 2025
Next filing: 30 Jul 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Kenkare-Mitra Sara	President and Head of R&D	C/O ALECTOR, INC., 131 OYSTER POINT BLVD., SUITE 600, SOUTH SAN FRANCISCO	/s/ Grace Wong-Sarad, by power of attorney	01 Jul 2025	0001895592

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	ALEC	Common Stock	Award	$0	+54,725	+11%	$0.000000	566,977	01 Jul 2025	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	ALEC	Employee Stock Option (right to buy)	Award	$0	+18,250		$0.000000	18,250	01 Jul 2025	Common Stock	18,250	$1.42	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	The reported shares are represented by restricted stock units, or RSUs, one half (1/2) of the total shares shall vest on December 1, 2025 and one fourth (1/4th) of the total shares shall vest quarterly thereafter.
F2	One third (1/3rd) of the total shares subject to the option shall vest on November 1, 2025, and one twelfth (1/12th) of the total shares subject to the option shall vest in equal monthly installments thereafter, provided that the shares subject to the option will vest in full on July 1, 2026.