CITADEL ADVISORS LLC - 26 Nov 2025 SCHEDULE 13G Report for Boundless Bio, Inc. Common stock, par value $0.0001 per share (the "Shares") (BOLD)

Filing Manager
CITADEL ADVISORS LLC
Reporting Manager
Kenneth Griffin
Security
Boundless Bio, Inc. Common stock, par value $0.0001 per share (the "Shares")
Symbol
BOLD
Shares outstanding
22,396,688 shares
Disclosed Ownership
1,433,388 shares
Ownership
6.4%
Form type
SCHEDULE 13G
Filing time
04 Dec 2025, 18:35:29 UTC
Date of event
26 Nov 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 3.7% 830,936 0 830,936 /s/ Seth Levy Seth Levy, Authorized Signatory
Citadel Advisors Holdings LP 3.7% 830,936 0 830,936 /s/ Seth Levy Seth Levy, Authorized Signatory
Citadel GP LLC 3.7% 830,936 0 830,936 /s/ Seth Levy Seth Levy, Authorized Signatory
Citadel Securities LLC 2.7% 602,452 0 602,452 /s/ Seth Levy Seth Levy, Authorized Signatory
Citadel Securities Group LP 2.7% 602,452 0 602,452 /s/ Seth Levy Seth Levy, Authorized Signatory
Citadel Securities GP LLC 2.7% 602,452 0 602,452 /s/ Seth Levy Seth Levy, Authorized Signatory
Kenneth Griffin 6.4% 1,433,388 0 1,433,388 /s/ Seth Levy Seth Levy, attorney-in-fact*