AMBAC FINANCIAL GROUP INC

CUSIP: 023139108 Class: COM

GLENMEDE TRUST CO NA's Holding History (CIK: 0000314949)

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

Q4 2007
Shares 16,145 Value ($000) $1,438 Avg Close — Range —
Q3 2007
Shares 12,155 Value ($000) $764 Avg Close — Range —
Q2 2007
Shares 17,305 Value ($000) $1,508 Avg Close — Range —
Q1 2007
Shares 16,716 Value ($000) $1,444 Avg Close — Range —
Q4 2006
Shares 16,145 Value ($000) $1,438 Avg Close — Range —