The geological basins of Northern California are getting the Royale treatment. Using modern computer-aided exploration technologies, Royale Energy concentrates its exploration and production efforts in the Sacramento and San Joaquin basins. The company pursues a strategy of acquiring stakes in oil and gas reserves via private joint ventures. It also owns leasehold interests in Louisana, Texas, and Utah. Royale Energy has estimated proved reserves of 4 billion cu. ft. of natural gas equivalent. CEO Donald Hosmer, CFO Stephen Hosmer, and their father and company chairman Harry Hosmer together own approximately 36% of Royale Energy. The company made a bid to buy privately held Matrix Oil in 2016.