TCG Crossover GP II, LLC - 31 Dec 2025 SCHEDULE 13G/A Report for Amylyx Pharmaceuticals Inc. Common Stock, $0.0001 par value per share (AMLX)

Filing Manager
TCG Crossover GP II, LLC
Reporting Manager
TCG Crossover GP II, LLC
Security
Amylyx Pharmaceuticals Inc. Common Stock, $0.0001 par value per share
Symbol
AMLX
Shares outstanding
109,540,561 shares
Disclosed Ownership
6,243,812 shares
Ownership
5.7%
Form type
SCHEDULE 13G/A
Filing time
17 Feb 2026, 16:22:22 UTC
Date of event
31 Dec 2025
SEC
View on sec.gov

Reporting Managers (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
TCG Crossover GP II, LLC 5.7% 6,243,812 0 6,243,812 /s/ Craig Skaling Craig Skaling, Authorized Signatory
TCG Crossover Fund II, L.P. 5.7% 6,243,812 0 6,243,812 /s/ Craig Skaling Craig Skaling, Authorized Signatory
Chen Yu 5.7% 6,243,812 0 6,243,812 /s/ Craig Skaling Craig Skaling, as Attorney-in-Fact for Chen Yu