Spire Inc. is a natural gas utility holding company that operates regulated distribution networks serving residential, commercial, and industrial customers across Missouri, Alabama, Mississippi, and the Gulf Coast through its Gas Utility segment, which generates revenue from tariff rates and transportation services. The company also owns Spire Marketing, a merchant subsidiary that procures and sells natural gas to utility and non-utility customers across the central and southern United States, and operates midstream assets including natural gas storage facilities and FERC-regulated pipelines that provide transportation and storage services to customers. Revenue is derived from three primary sources: regulated tariff rates from utility distribution operations, commodity margins and merchant services from gas marketing, and firm transportation and storage fees from midstream infrastructure, with overall earnings concentrated during the heating season when residential demand peaks.