Adage Capital Management, L.P. - 31 Dec 2025 SCHEDULE 13G/A Report for Amylyx Pharmaceuticals, Inc. Common Stock, $0.0001 par value per share (AMLX)

Filing Manager
Adage Capital Management, L.P.
Reporting Manager
Adage Capital Management, L.P.
Security
Amylyx Pharmaceuticals, Inc. Common Stock, $0.0001 par value per share
Symbol
AMLX
Shares outstanding
109,765,020 shares
Disclosed Ownership
2,777,055 shares
Ownership
2.5%
Form type
SCHEDULE 13G/A
Filing time
12 Feb 2026, 09:09:10 UTC
Date of event
31 Dec 2025
Previous filing
13 Nov 2025
SEC
View on sec.gov

Reporting Managers (3)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Adage Capital Management, L.P. 2.5% 2,777,055 0 2,777,055 /s/ Robert Atchinson By: Adage Capital Partners LLC, its General Partner, By: Robert Atchinson, its Managing Member
Robert Atchinson 2.5% 2,777,055 0 2,777,055 /s/ Robert Atchinson Robert Atchinson, individually
Phillip Gross 2.5% 2,777,055 0 2,777,055 /s/ Phillip Gross Phillip Gross, individually