New year, new deals for $19 billion private equity shop Quantum Energy Partners and CEO Wil VanLoh. Last month Quantum portfolio company Tug Hill Operating sold to natural gas giant EQT EQT -3.4% for $5.2 billion. Quantum had invested more than $1 billion into Tug Hill since 2014. Now this week comes another big deal, with Tokyo Gas reportedly set to pay $4.6 billion for Rockcliff Energy, which Quantum backed with $350 million in 2016. The rumored deal was first reported by Reuters. Tug...