Spire Inc. (NYSE: SR) operates as a public utility holding company that purchases, distributes, and sells natural gas to approximately 1.7 million residential, commercial, industrial, and wholesale customers primarily in Missouri, Alabama, and Mississippi; the company also markets natural gas and related services, provides transportation and storage of natural gas, operates propane pipelines, and offers risk management solutions through its Gas Utility, Gas Marketing, and Midstream segments. Its core subsidiaries include Spire Missouri Inc., the largest natural gas distributor in Missouri serving the St. Louis area and eastern counties; Spire Alabama Inc. covering greater Birmingham, Montgomery, and other regions; Spire Mississippi Inc. in Hattiesburg; and Spire Gulf Coast Inc. in Mobile, Alabama. Founded in 1857 and headquartered at 700 Market Street in St. Louis, Missouri, Spire employs around 3,475 people and focuses on regulated utility operations alongside non-regulated growth opportunities. In July 2025, Spire agreed to acquire the Tennessee operations of Piedmont Natural Gas from Duke Energy for $2.48 billion, adding over 200,000 customers, nearly 3,800 miles of pipelines, and a new Spire Tennessee unit in the fast-growing Nashville metro area, with the deal expected to close in Q1 2026 pending regulatory approval; this move expands its utility customer base toward two million and supports a $7.4 billion capital plan through 2034, including $875 million in fiscal 2025 expenditures for infrastructure, advanced metering (over 850,000 installed), and 5-7% long-term earnings growth.