Approach Resources Inc $4,691 Hallador Petroleum Co $3,818,059 Carbon Natural Gas Company $0 Star Gas Partners Lp $13,839,300 Ramaco Resources Inc $1,754,308 Riley Exploration Permian Ord Shs $189,099 Approach Resources Inc $4,691 Hallador Petroleum Co $3,818,059 Carbon Natural Gas Company $0 Star Gas Partners Lp $13,839,300 Ramaco Resources Inc $1,754,308 Riley Exploration Permian Ord Shs $189,099