November 4, 2005 - GTC Biotherapeutics Announces Time Change for Webcast of Corporate Presentation at SG Cowen & Co. 6th Annual Global Health Care Conference

November 2, 2005 - GTC Biotherapeutics Reports Third Quarter 2005 Financial Results

November 1, 2005 - GTC Biotherapeutics and Leo Pharma to Develop and Market ATrynŽ in Europe, the Middle East, and Canada

October 26, 2005 - GTC Biotherapeutics to Host Third Quarter 2005 Earnings Call and Webcast on Wednesday, November 2, 2005

October 21, 2005 - GTC Biotherapeutics to Webcast Corporate Presentation at CEUT Emerging Growth Life Sciences Conference

October 21, 2005 - GTC Biotherapeutics Announces Filing of Shelf Registration Statement

October 13, 2005 - GTC Biotherapeutics to Webcast Corporate Presentation at Bio InvestorForum 2005

September 20, 2005 - GTC Biotherapeutics Enters Agreement for Further Clinical Production of MM-093 for Merrimack Pharmaceuticals

September 16, 2005 - GTC Biotherapeutics Anticipates EMEA Opinion on ATrynŽ in February 2006

August 11, 2005 - GTC Biotherapeutics Reports Second Quarter 2005 Financial Results

August 8, 2005 - Recombinant Human Antithrombin Demonstrates Therapeutic Potential in Endotoxemia Model of Sepsis

August 8, 2005 - GTC Biotherapeutics Announces Private Placement of Common Stock and Warrants

August 4, 2005 - GTC Biotherapeutics to Host Second Quarter 2005 Earnings Call and Webcast on Thursday, August 11, 2005

August 1, 2005 - GTC Biotherapeutics Receives Notice of Allowance on Purification Patent

July 28, 2005 - GTC Biotherapeutics and Scancell Collaborate on SC101 Antibody

July 6, 2005 - GTC Biotherapeutics Files Response to EMEA List of Outstanding Issues

May 20, 2005 - GTC Biotherapeutics to Webcast Annual Meeting of Stockholders on May 25, 2005

April 28, 2005 - GTC Biotherapeutics to Webcast Corporate Presentation at Rodman & Renshaw Techvest 2nd Annual Global Healthcare Conference

April 28, 2005 - GTC Biotherapeutics Reports First Quarter 2005 Financial Results

April 25, 2005 - GTC Biotherapeutics Plans to Respond to EMEA by July 8, 2005

April 21, 2005 - GTC Biotherapeutics to Host First Quarter 2005 Earnings Call and Webcast on Thursday, April 28, 2005

April 6, 2005 - GTC Biotherapeutics to Begin ATrynŽ US Clinical Studies

March 16, 2005 - GTC Biotherapeutics Provides Update on European Regulatory Review of ATrynŽ

March 10, 2005 - GTC Biotherapeutics to Webcast Corporate Presentation at SG Cowen & Co's 25th Annual Healthcare Conference

March 2, 2005 - GTC Biotherapeutics Reports Fourth Quarter and Year End 2004 Financial Results

February 23, 2005 - GTC Biotherapeutics' to Release Fourth Quarter and Year End 2004 Financial Results and Host Webcast on Wednesday, March 2, 2005

February 15, 2005 - GTC Biotherapeutics' Corporate Presentation at BIO CEO & Investor Conference to be Webcast

January 24, 2005 - GTC Biotherapeutics Announces Sale of Common Stock