AMBAC FINL GROUP INC

Ticker: OSG CUSIP: 023139884 Class: Common Stock

Optiver Holding B.V.'s Holding History (CIK: 0001859606)

Note: Option positions (PUT/CALL) are excluded.

Q4 2025

Shares 370 Value ($000) $3 Avg Close $8.55 Range $7.63 - $10.38

Q3 2025

Shares 424 Value ($000) $4 Avg Close $8.45 Range $6.86 - $10.05

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	370	$3	$8.55	$7.63 - $10.38
Q3 2025	424	$4	$8.45	$6.86 - $10.05