Neil Lindsay Berkley - 20 Jun 2025 Form 3 Insider Report for Alector, Inc. (ALEC)

Role: Principal Financial Officer
Signature: /s/ Grace Wong-Sarad, by power of attorney
Issuer symbol: ALEC
Transactions as of: 20 Jun 2025
Net transactions value: $0
Form type: 3
Filing time: 30 Jun 2025, 16:45:06 UTC
Next filing: 01 Jul 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Berkley Neil Lindsay	Principal Financial Officer	C/O ALECTOR, INC., 131 OYSTER POINT BLVD, SUITE 600, SOUTH SAN FRANCISCO	/s/ Grace Wong-Sarad, by power of attorney	30 Jun 2025	0002075298

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
holding	ALEC	Common Stock						362,412	20 Jun 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
holding	ALEC	Employee Stock Option (right to buy)							20 Jun 2025	Common Stock	12,975	$1.10	Direct	F2

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

Explanation of Responses:

Id	Content
F1	Of the reported shares, 295,639 are represented by restricted stock units, or RSUs, which vest as follows: (i) 133,334 RSUs vest in eight equal quarterly installments beginning on September 1, 2025; (ii) 123,405 RSUs vest in nine equal quarterly installments beginning on September 1, 2025; and (iii) 38,900 RSUs vest as to three-fourths (3/4ths) on December 1, 2025 and as to the remainder on March 1, 2026.
F2	One-half (1/2) of the total shares subject to the option vest on November 1, 2025, and one-twelfth (1/12th) of the total shares shall vest monthly beginning on December 1, 2025.

Content

Of the reported shares, 295,639 are represented by restricted stock units, or RSUs, which vest as follows: (i) 133,334 RSUs vest in eight equal quarterly installments beginning on September 1, 2025; (ii) 123,405 RSUs vest in nine equal quarterly installments beginning on September 1, 2025; and (iii) 38,900 RSUs vest as to three-fourths (3/4ths) on December 1, 2025 and as to the remainder on March 1, 2026.

One-half (1/2) of the total shares subject to the option vest on November 1, 2025, and one-twelfth (1/12th) of the total shares shall vest monthly beginning on December 1, 2025.