Stock Trading History of Weaver Leslie 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 Weaver Leslie A since year 2005. The trader's CIK number is 1309766. At the time of this reporting, Weaver Leslie A is the 10% Owner of Amcol International Corp (stock ticker symbol ACO).

Stock purchases, sales, and option exercises reported by *Weaver Leslie A* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2007-03-02	ACO	Amcol International Corp	Sale	10,000	27.79	277,900
2007-03-01	ACO	Amcol International Corp	Sale	10,000	28.48	284,800
2007-02-28	ACO	Amcol International Corp	Sale	10,000	28.47	284,700
2007-03-09	ACO	Amcol International Corp	Sale	5,055	28.32	143,157
2007-03-06	ACO	Amcol International Corp	Sale	10,000	26.67	266,700
2007-03-05	ACO	Amcol International Corp	Sale	10,000	26.46	264,600

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 Weaver Leslie A (10% Owner of Amcol International Corp at the time of this reporting) see the Securities and Exchange Commission (SEC) website.