Filing Manager
TCG Crossover GP II, LLC
Reporting Manager
Chen Yu
Symbol
SRZN
Shares outstanding
11,175,526 shares
Disclosed Ownership
1,274,010 shares
Ownership
11%
Form type
SCHEDULE 13G
Filing time
02 Feb 2026, 16:13:26 UTC
Date of event
26 Jan 2026

Reporting Managers (5)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
TCG Crossover GP II, LLC 5.7% 637,005 0 637,005 /s/ Craig Skaling Craig Skaling, Authorized Signatory
TCG Crossover Fund II, L.P. 5.7% 637,005 0 637,005 /s/ Craig Skaling Craig Skaling, Authorized Signatory
TCG Crossover GP III, LLC 5.7% 637,005 0 637,005 /s/ Craig Skaling Craig Skaling, Authorized Signatory
TCG Crossover Fund III, L.P. 5.7% 637,005 0 637,005 /s/ Craig Skaling Craig Skaling, Authorized Signatory
Chen Yu 11% 1,274,010 0 1,274,010 /s/ Craig Skaling Craig Skaling, as Attorney-in-Fact for Chen Yu