Stock Trading History of Cox Geoffrey F

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 Cox Geoffrey F since year 2005. The trader's CIK number is 1021014. At the time of this reporting, Cox Geoffrey F is the President, CEO and Chairman of Gtc Biotherapeutics Inc . (stock ticker symbol GTCB). See this page for all insider trading activities at Gtc Biotherapeutics Inc .

Stock purchases, sales, and option exercises reported by insider *Cox Geoffrey F* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2008-03-14	GTCB	Gtc Biotherapeutics Inc	Purchase	100,400	.48	48,192
2007-12-13	GTCB	Gtc Biotherapeutics Inc	Purchase	10,765	.89	9,579
2007-08-13	GTCB	Gtc Biotherapeutics Inc	Purchase	14,200	1.02	14,554
2007-03-14	GTCB	Gtc Biotherapeutics Inc	Purchase	24,000	1.00	24,000
2006-11-06	GTCB	Gtc Biotherapeutics Inc	Purchase	14,300	1.06	15,158
2005-05-04	GTCB	Gtc Biotherapeutics Inc	Purchase	5,000	.96	4,775
2005-03-15	GTCB	Gtc Biotherapeutics Inc	Purchase	5,300	1.80	9,513

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 Cox Geoffrey F (President, CEO and Chairman of Gtc Biotherapeutics Inc at the time of this reporting) see the Securities and Exchange Commission (SEC) website.