INVESTORS

SEC Documents

Every year, the Securities and Exchange Commission of the United States (SEC) requires companies that list their stock in that country's Stock Exchange markets to present financial information, with the aim to protect investors. In this section, you will find “20F” documents, issued in accordance with the requirements of such commission.

Documents filed with the SEC (shareholders may receive a hard copy of the 20-F forms free of charge upon request).

Securities and Exchange Commission

2013

Form TGS 20F 2013- Washington, D.C. 20549

2012

Form TGS 20F 2012- Washington, D.C. 20549

2011

Form TGS 20F 2011- Washington, D.C. 20549

2010

Form TGS 20F 2010 - Washington, D.C. 20549

2009

Form TGS 20F 2009 - Washington, D.C. 20549

2008

Form TGS 20F 2008 - Washington, D.C. 20549

2007

Form TGS 20F 2007 - Washington, D.C. 20549

2006

Form TGS 20F 2006 - Washington, D.C. 20549

2005

Form TGS 20F 2005 - Washington, D.C. 20549

2004

Form TGS 20F 2004 - Washington, D.C. 20549

2003

Form TGS 20F 2003 - Washington, D.C. 20549

2002

Form TGS 20F 2002 - Washington, D.C. 20549

2001

Form TGS 20F 2001 - Washington, D.C. 20549

2000

Form TGS 20F 2000 - Washington, D.C. 20549

1999

Form TGS 20F 1999 - Washington, D.C. 20549