Stock Trading History of Roberts William

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 Roberts William since year 2005. The trader's CIK number is 1226687. At the time of this reporting, Roberts William is the VP, Regul Devel & Med Safety of Regeneron Pharmaceuticals Inc . (stock ticker symbol REGN). See this page for all insider trading activities at Regeneron Pharmaceuticals Inc .

Stock purchases, sales, and option exercises reported by insider *Roberts William* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-09-22	REGN	Regeneron Pharmaceuticals Inc	Sale	9,692	22.84	221,365
2008-09-16	REGN	Regeneron Pharmaceuticals Inc	Option Exercise	25,000	8.77	219,250
2008-08-20	REGN	Regeneron Pharmaceuticals Inc	Option Exercise	34,840	6.50	226,460

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 Roberts William (VP, Regul Devel & Med Safety of Regeneron Pharmaceuticals Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.