| Company | Share | Date / Documentation |
|---|---|---|
| Ltd Geo-industria | 85% (Former) 85% (Former) 85% (Former) 85% (Former) 85% (Former) 85% (Former) 85% (Former) 85% (Former) 85% (Former) 85% (Former) 7.5% (Former) May 15, 2017 February 10, 2017 April 1, 2013 September 27, 2012 September 26, 2012 May 23, 2012 April 17, 2012 March 11, 2011 October 4, 2010 January 29, 2010 January 26, 2010 | |