Stock Trading History of Bienstock Gregg L

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 Bienstock Gregg L since year 2005. The trader's CIK number is 1194137. At the time of this reporting, Bienstock Gregg L is the Senior Vice President 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 *Bienstock Gregg L* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-03-07	ABK	Ambac Financial Group Inc	Purchase	6,000	6.75	40,500
2006-12-18	ABK	Ambac Financial Group Inc	Sale	12,000	90.12	1,081,380
2006-12-18	ABK	Ambac Financial Group Inc	Option Exercise	12,000	48.66	583,920
2006-08-30	ABK	Ambac Financial Group Inc	Sale	10,000	87.22	872,150
2006-08-30	ABK	Ambac Financial Group Inc	Option Exercise	10,000	48.66	486,599
2006-03-20	ABK	Ambac Financial Group Inc	Sale	6,893	81.52	561,944
2006-03-20	ABK	Ambac Financial Group Inc	Option Exercise	6,893	63.62	438,509

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 Bienstock Gregg L (Senior Vice President of Ambac Financial Group Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.