Reporting Manager
SIG Brokerage, LP
Symbol
AMBC
Shares outstanding
46.6M shares
Disclosed Ownership
2.38M shares
Ownership
5.1%
Form type
SCHEDULE 13G
Date filed
8/14/2025, 10:28 AM
Date of event
Jun 30, 2025
Next filing
Nov 13, 2025

Reporting Managers (2)

Name Ownership Shares Owned sole voting power shared voting power Signature Title CIK
SIG Brokerage, LP 5.1% 2.38M 15K 2.38M /s/ Brian Sopinsky Brian Sopinsky, Assistant Secretary
Susquehanna Securities, LLC 5.1% 2.38M 2.36M 2.38M /s/ Brian Sopinsky Brian Sopinsky, Secretary