AMBAC FINL GROUP INC

Ticker: OSG CUSIP: 023139884 Class: Common Stock

ESSEX INVESTMENT MANAGEMENT CO LLC's Holding History (CIK: 0000201772)

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

Q4 2025

Shares 410,822 Value ($000) $3,196 Avg Close $8.55 Range $7.63 - $10.38

Period	Shares	Value ($000)	Average Close	Price Range
Q4 2025	410,822	$3,196	$8.55	$7.63 - $10.38