With a market capitalization (market cap) of $4.91B — a measure of how much the company is worth — Spire Inc. is the 1440th most valuable company in Utilities as of August 18, 2026. Shares trade at $83.13, up +1.02% on the day.
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Spire Inc. operates as a public utility holding company, which provides natural gas services through its regulated core utility operations while engaging in non-regulated activities. It operates through the following business segments: Gas Utility, Gas Marketing, and Midstream. The Gas Utility segment includes the regulated operations of Spire Missouri, Spire Alabama, Spire Gulf, and Spire Mississippi. The Gas Marketing segment represents the subsidiary, Spire Marketing, which provides non-regulated natural gas marketing services throughout the United States. The Midstream segment consists of Spire STL Pipeline, Spire MoGas Pipeline, Spire Storage West, and Spire Storage Salt Plains, which are subsidiaries engaged in the transportation and storage of natural gas. The company was founded in 1857 and is headquartered in St. Louis, MO.
Visit websiteAs of August 18, 2026, Spire Inc. (SR) is worth $4.91B — this is its market capitalization, the total value of all its outstanding shares.
Spire Inc.’s market cap is $4.91B, which ranks it #1440 among the most valuable companies in the Utilities sector tracked on MarketCapLens.
Spire Inc. (SR) shares trade at $83.13, up 1.02% on the day, as of August 18, 2026.
Spire Inc. trades at a price-to-earnings (P/E) ratio of 18.9, based on its latest share price and annual earnings per share.
Fundamentals are annual. Figures labeled with their fiscal year.
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