Stock Trading History of Callen Michael A

The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Callen Michael A since year 2005. The trader's CIK number is 1194126. At the time of this reporting, Callen Michael A is the Chairman, President and CEO of Ambac Financial Group Inc . (stock ticker symbol ABK). See this page for all insider trading activities at Ambac Financial Group Inc .

Stock purchases, sales, and option exercises reported by insider *Callen Michael A* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-03-07	ABK	Ambac Financial Group Inc	Purchase	25,000	6.75	168,750
2007-11-01	ABK	Ambac Financial Group Inc	Purchase	3,000	31.08	93,255
2007-04-27	ABK	Ambac Financial Group Inc	Option Exercise	3,750	30.35	113,812
2007-04-27	ABK	Ambac Financial Group Inc	Sale	3,750	92.64	347,381
2006-05-11	ABK	Ambac Financial Group Inc	Sale	3,000	83.30	249,900
2006-05-11	ABK	Ambac Financial Group Inc	Option Exercise	3,000	39.56	118,680
2005-10-21	ABK	Ambac Financial Group Inc	Sale	5,000	69.12	345,600

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Callen Michael A (Chairman, President and CEO of Ambac Financial Group Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.