Material Agreement, Financial Obligation (Form 8-K)

Item 1.01 Entry into a Material Definitive Agreement.

On October 23, 2025, Spire Missouri Inc. ("Spire Missouri"), a wholly-owned subsidiary of Spire Inc., entered into a Bond Purchase Agreement, dated October 23, 2025 ("Bond Purchase Agreement"), among Spire Missouri and certain institutional purchasers ("Bond Purchasers") pursuant to which Spire Missouri issued and sold to the Bond Purchasers in a private placement exempt from registration under the Securities Act of 1933, as amended, $150 million in aggregate principal amount of its First Mortgage Bonds, 4.60% Series due September 15, 2030 (the "2030 Bonds") and $50 million in aggregate principal amount of its First Mortgage Bonds, 4.65% Series due January 15, 2031 (the "2031 Bonds") (collectively, the "Bonds"). The 2030 Bonds will bear interest at a rate of 4.60% per annum. The 2031 Bonds will bear interest at a rate of 4.65% per annum. The interest on the Bonds is payable semi-annually on the 15th day of March and September of each year. The Bonds are secured by a Mortgage and Deed of Trust, dated as of February 1, 1945 (as amended and supplemented heretofore, the "Mortgage"), under which Regions Bank is the present Trustee. The Mortgage is supplemented by a Forty-First Supplemental Indenture dated as of October 23, 2025. The Bonds will rank equal in right to payment with all other first mortgage bonds issued under the Mortgage. Spire Missouri will use the proceeds from the sale of the Bonds for general corporate purposes.

The Bond Purchase Agreement contains provisions similar to those in other supplemental indentures to the Mortgage, including, among other things, limitations on certain types of liens and the payment of dividends and other restricted payments. It also contains customary events of default, including, without limitation, payment defaults, covenant defaults and certain events of bankruptcy and insolvency. Generally, upon the occurrence of a completed default, the trustee may, and shall if directed by the holders of a majority of first mortgage bonds then outstanding under the Mortgage, accelerate the maturity of the bonds.

The Forty-First Supplemental Indenture provides that Spire Missouri may at its option redeem all or part of the Bonds at 100% of the principal amount of the Bonds to be redeemed, plus a "make-whole amount" determined for the redemption date with respect to such principal amount. The make-whole amount is an amount equal to the excess, if any, of the discounted value of the remaining scheduled payments with respect to the called principal amount of the Bonds over the amount of such called principal, with the discounted value based on a discount factor equal to 0.50% over the yield to maturity of U.S. Treasury securities having a remaining average life comparable to the principal amount called for redemption. In addition, Spire Missouri may redeem (A) the 2030 Bonds in whole at a redemption price equal to 100% of the principal amount of the 2030 Bonds beginning (i) September 15, 2030; and (ii) at any time if all or substantially all of its property subject to the Mortgage is taken by eminent domain or sold to a governmental body or its designee; and (B) the 2031 Bonds in whole at a redemption price equal to 100% of the principal amount of the 2031 Bonds beginning (i) January 15, 2031; and (ii) at any time if all or substantially all of its property subject to the Mortgage is taken by eminent domain or sold to a governmental body or its designee.

Item 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant.

The disclosure required by this item is included in Item 1.01 above and incorporated herein by reference.