Citadel Advisors Llc - Sep 30, 2025 SCHEDULE 13G/A Report for Cabaletta Bio, Inc. Common stock, par value $0.00001 per share (the "Shares") (CABA)

Filing Manager
Citadel Advisors Llc
Reporting Manager
Kenneth Griffin
Security
Cabaletta Bio, Inc. Common stock, par value $0.00001 per share (the "Shares")
Symbol
CABA
Shares outstanding
92.7M shares
Disclosed Ownership
3.15M shares
Ownership
3.4%
Form type
SCHEDULE 13G/A
Date filed
11/14/2025, 04:09 PM
Date of event
Sep 30, 2025
Previous filing
Jun 20, 2025
SEC
View on sec.gov

Reporting Managers (7)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
Citadel Advisors LLC 3.1% 2.91M 0 2.91M /s/ Seth Levy Seth Levy, Authorized Signatory
Citadel Advisors Holdings LP 3.1% 2.91M 0 2.91M /s/ Seth Levy Seth Levy, Authorized Signatory
Citadel GP LLC 3.1% 2.91M 0 2.91M /s/ Seth Levy Seth Levy, Authorized Signatory
Citadel Securities LLC 0.3% 245K 0 245K /s/ Seth Levy Seth Levy, Authorized Signatory
Citadel Securities Group LP 0.3% 245K 0 245K /s/ Seth Levy Seth Levy, Authorized Signatory
Citadel Securities GP LLC 0.3% 245K 0 245K /s/ Seth Levy Seth Levy, Authorized Signatory
Kenneth Griffin 3.4% 3.15M 0 3.15M /s/ Seth Levy Seth Levy, attorney-in-fact*