GTC Biotherapeutics (fka GTCB)

[DewDiligence]

Insider Transactions During Past 18 Months

[Includes transactions through 3/14/08. Please
see #msg-27693903 for current insider holdings.]


PURCHASES

Geoffrey Cox, CEO
14-Mar-2008 93,000 shares @$0.45-0.50
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 (5 purchases): 153,265 shares @$0.45-1.07

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

Daniel Woloshen, Gen. Counsel
12-Mar-2008 17,000 shares @$0.57
22-Dec-2006 7,500 shares @$1.10

Greg Liposky, SVP Oprtns
12-Mar-2008 8,000 shares @$0.56-0.57


SEC links:
http://www.sec.gov/Archives/edgar/data/904973/000090866208000112/xslF345X02/edgar.xml
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/904973/000090866208000109/xslF345X02/edgar.xml
http://www.sec.gov/Archives/edgar/data/904973/000090866206000415/xslF345X02/edgar.xml
http://www.sec.gov/Archives/edgar/data/904973/000090866208000110/xslF345X02/edgar.xml