In 2010 gigantic Japanese trading house Sumitomo Corp. bought a 30% stake (joint venture) in Rex Energy’s Marcellus drilling operation in Bulter County, PA for $150.7 million. Sumitomo wrote down much of the value for that purchase in 2015. In 2018 Rex went bankrupt and now PennEnergy Resources owns and operates the Butler assets (see Rex Energy Sells Itself to PennEnergy Resources for $600M). PennEnergy is getting a new JV partner. Yesterday Sumitomo announced the sale of their 30% share of the action.