Rio Tinto acquires a majority stake in Ivanhoe Mines

As Rio Tinto acquires a majority stake in Ivanhoe Mines in January 2012,[1] the name of Ivanhoe Mines is changed into Turquoise Hills Resources (TRQ) as of August 2012.[2]
[1] https://www.sec.gov/Archives/edgar/data/863064/000119312512048239/d297442dex994.htm, retrieved 7 September 2017
[2] http://www.marketwired.com/press-release/ivanhoe-mines-changes-name-to-turquoise-hill-resources-tsx-ivn-1686881.htm, and https://www.nasdaq.com/article/ivanhoe-mines-changes-name-becomes-turquoise-hill-resources-cm161020, retrieved 7 September 2017.