Southwest Gas Holdings, Inc. is an energy holding company based in Las Vegas, NV. The company makes deliveries of natural gas under a priority system established by state regulatory commissions, which aims that higher-priority customers, primarily residential customers and other customers who use 500 therms or less of gas per day are given greater importance. The company systematically acquires and arranges delivery of natural gas to its system in sufficient quantities to meet customers' needs. Southwest acquires natural gas from a wide variety of sources with a mix of purchase provisions, which includes spot market and firm supplies.