TCG Crossover GP II, LLC - 22 Oct 2025 SCHEDULE 13G Report for Alector, Inc. Common Stock, par value $0.0001 per share (ALEC)

Filing Manager
TCG Crossover GP II, LLC
Reporting Manager
Chen Yu
Security
Alector, Inc. Common Stock, par value $0.0001 per share
Symbol
ALEC
Shares outstanding
108,695,652 shares
Disclosed Ownership
10,000,000 shares
Ownership
9.2%
Form type
SCHEDULE 13G
Filing time
14 Nov 2025, 16:18:52 UTC
Date of event
22 Oct 2025
SEC
View on sec.gov

Reporting Managers (5)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
TCG Crossover GP II, LLC 4.6% 5,000,000 0 5,000,000 /s/ Craig Skaling Craig Skaling, Authorized Signatory
TCG Crossover Fund II, L.P. 4.6% 5,000,000 0 5,000,000 /s/ Craig Skaling Craig Skaling, Authorized Signatory
TCG Crossover GP III, LLC 4.6% 5,000,000 0 5,000,000 /s/ Craig Skaling Craig Skaling, Authorized Signatory
TCG Crossover Fund III, L.P. 4.6% 5,000,000 0 5,000,000 /s/ Craig Skaling Craig Skaling, Authorized Signatory
Chen Yu 9.2% 10,000,000 0 10,000,000 /s/ Craig Skaling Craig Skaling, as Attorney-in-Fact for Chen Yu