Arnon Rosenthal - 31 Dec 2025 SCHEDULE 13G/A Report for Alector, Inc. Common Stock, $0.0001 par value per share (ALEC)

Filing Manager: Arnon Rosenthal
Reporting Manager: Arnon Rosenthal
Security: Alector, Inc. Common Stock, $0.0001 par value per share
Symbol: ALEC
Shares outstanding: 110,998,986 shares
Disclosed Ownership: 8,213,925 shares
Ownership: 7.4%
Form type: SCHEDULE 13G/A
Filing time: 06 Feb 2026, 16:30:02 UTC
Date of event: 31 Dec 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
Arnon Rosenthal	7.4%	8,213,925	4,283,550	3,930,375	/s/Arnon Rosenthal	Arnon Rosenthal