GTC Biotherapeutics (fka GTCB)

[DewDiligence]

Summary of Insider Transactions in 2006-2007

[Updated for purchases on 12/17/07. Please see
#msg-25370953 for current insider holdings.]


PURCHASES

Geoffrey Cox, CEO
13-Dec-2007 10,765 shares @$0.88-0.90
13-Aug-2007 14,200 shares @$1.02-1.03
14-Mar-2007 24,000 shares @$0.99-1.01
08-Nov-2006 14,300 shares @$1.05-1.07
===
Total (4 purchases): 63,265 shares @$0.88-1.07

Jack Green, CFO
14-Dec-2007 1,500 shares @$0.89

Harry Meade, SVP Research
14-Dec-2007 10,000 shares @$0.90

Greg Liposky, SVP Oprtns
17-Dec-2007 1,100 shares @$0.87

Daniel Woloshen, Gen. Counsel
17-Dec-2007 1,200 shares @$0.89

James Geraghty, Director
14-Dec-2007 10,000 shares @$0.87

Mary Ann Gray, Director
17-Dec-2007 10,000 shares @$0.88


SALES

Greg Liposky, SVP Oprtns
17-Mar-2006 20,000 shares @$1.01 (half of 40,000-share annual bonus)


SEC links:
http://www.sec.gov/Archives/edgar/data/904973/000090866207000400/xslF345X02/edgar.xml
http://www.sec.gov/Archives/edgar/data/904973/000090866207000291/xslF345X02/edgar.xml
http://www.sec.gov/Archives/edgar/data/904973/000090866207000131/xslF345X02/edgar.xml
http://www.sec.gov/Archives/edgar/data/904973/000118095506000107/xslF345X02/edgar.xml
http://www.sec.gov/Archives/edgar/data/904973/000090866207000406/xslF345X02/edgar.xml
http://www.sec.gov/Archives/edgar/data/904973/000090866207000407/xslF345X02/edgar.xml
http://www.sec.gov/Archives/edgar/data/904973/000090866207000409/xslF345X02/edgar.xml
http://www.sec.gov/Archives/edgar/data/904973/000090866207000411/xslF345X02/edgar.xml
http://www.sec.gov/Archives/edgar/data/904973/000090866207000435/xslF345X02/edgar.xml
http://www.sec.gov/Archives/edgar/data/904973/000090866207000413/xslF345X02/edgar.xml
http://www.sec.gov/Archives/edgar/data/904973/000090866206000186/xslF345X02/edgar.xml