Insider Stock Trading History of Richter Kirk 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 Richter Kirk A since year 2005. The trader's CIK number is 1200843. At the time of this reporting, Richter Kirk A is the Treasurer of Sigma Aldrich Corp . (stock ticker symbol SIAL). See this page for all insider trading activities at Sigma Aldrich Corp .


Stock purchases, sales, and option exercises reported by insider Richter Kirk A since 2005.
  Trade Date   Symbol Company Name (Issuer) Trade Type     Shares       Price ($)   Value ($)
2012-02-14 SIAL Sigma Aldrich Corp Option Ex 20,000 25.32 506,300
2012-02-14 SIAL Sigma Aldrich Corp Sale 18,500 70.00 1,295,000
2010-08-31 SIAL Sigma Aldrich Corp Option Ex 24,000 18.25 438,000
2010-08-31 SIAL Sigma Aldrich Corp Sale 24,000 53.00 1,272,000
2009-03-04 SIAL Sigma Aldrich Corp Option Ex 6,600 13.44 88,684
2009-03-04 SIAL Sigma Aldrich Corp Sale 6,600 33.74 222,684
2009-02-27 SIAL Sigma Aldrich Corp Sale 3,400 36.04 122,536
2009-02-27 SIAL Sigma Aldrich Corp Option Ex 3,400 13.44 45,685
2008-01-09 SIAL Sigma Aldrich Corp Option Ex 1,400 18.44 25,811
2007-08-10 SIAL Sigma Aldrich Corp Option Ex 8,600 18.44 158,558
2007-08-08 SIAL Sigma Aldrich Corp Sale 9,200 50.85 467,783

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 Richter Kirk A (Treasurer of Sigma Aldrich Corp at the time of this reporting) see the Securities and Exchange Commission (SEC) website.