Nice find.
There's a big gap between 2011 and December 2016, isn't there!
Mitsubishi have been trying to sell OPR, as mentioned in the AFR:
https://www.copyright link/business...eement-to-sell-oakajee-assets-20180724-h132a5
I cannot find anything that suggests a buyer has been found (yet), and Mitsubishi still mention OPR as an asset in their latest (Sep 18) Corporate profile.
https://www.mitsubishicorp.com/au/en/pdf/cg_au.pdf