Spire Inc. is a regional public utility holding company based in St. Louis, Missouri, providing natural gas service through its regulated core utility operations while engaging in non-regulated activities that provide business opportunities.

Its primary subsidiary Laclede Gas Company is the largest natural gas distribution utility in Missouri, serving approximately 631,000 residential, commercial and industrial customers in the City of St. Louis and ten counties in eastern Missouri.

Its corporate headquarters is located in the 700 Market building in downtown St. Louis.

On April 29, 2016, the company began trading on the New York Stock Exchange under the symbol SR.

In 2014 Laclede acquired Alabama Gas Corporation (Alagasco),[8] which serves the Greater Birmingham, East Lauderdale County, Gadsden, Jasper, Anniston-Oxford, Greater Tuscaloosa, Greater Montgomery, Opelika-Auburn, Tuskegee, Selma, and many Black Belt communities as Spire Alabama Inc. On April 28, 2016, The Laclede Group shareholders approved renaming the company to Spire.