Baker Bros. Advisors Lp - Sep 30, 2025 SCHEDULE 13G/A Report for Cerus Corporation Common Stock, par value $0.001 per share (CERS)

Filing Manager
BAKER BROS. ADVISORS LP
Reporting Manager
Julian C. Baker
Security
Cerus Corporation Common Stock, par value $0.001 per share
Symbol
CERS
Shares outstanding
193M shares
Disclosed Ownership
10M shares
Ownership
5.2%
Form type
SCHEDULE 13G/A
Date filed
11/14/2025, 04:24 PM
Date of event
Sep 30, 2025
Previous filing
Aug 14, 2025
SEC
View on sec.gov

Reporting Managers (4)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Baker Bros. Advisors LP 5.2% 10M 10M 0 /s/ Scott L. Lessing Scott L. Lessing/ President By: Baker Bros. Advisors (GP) LLC, its general partner
Baker Bros. Advisors (GP) LLC 5.2% 10M 10M 0 /s/ Scott L. Lessing Scott L. Lessing/ President
Julian C. Baker 5.2% 10M 10M 0 /s/ Julian C. Baker Julian C. Baker
Felix J. Baker 5.2% 10M 10M 0 /s/ Felix J. Baker Felix J. Baker