| Schedule of Estimated Fair Value of Financial Instruments Not Measured at Fair Value on Recurring Basis |
The carrying amounts and estimated fair values of financial instruments not measured at fair value on a recurring basis are shown in the following tables, classified according to the fair value hierarchy. There were no such instruments classified as Level 3 (significant unobservable inputs) as of June 30, 2026, September 30, 2025, and June 30, 2025.
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Classification of Estimated
Fair Value |
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Carrying
Amount |
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Fair
Value |
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Quoted Prices
in Active
Markets
(Level 1) |
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Significant
Observable
Inputs
(Level 2) |
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Spire |
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As of June 30, 2026 |
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Cash and cash equivalents |
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$ |
20.7 |
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$ |
20.7 |
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$ |
20.7 |
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$ |
— |
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Notes payable |
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1,263.5 |
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1,263.5 |
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— |
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1,263.5 |
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Long-term debt, including current portion |
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5,996.1 |
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5,839.9 |
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— |
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5,839.9 |
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As of September 30, 2025 |
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Cash and cash equivalents |
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$ |
5.7 |
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$ |
5.7 |
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$ |
5.7 |
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$ |
— |
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Notes payable |
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1,317.0 |
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1,317.0 |
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— |
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1,317.0 |
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Long-term debt, including current portion |
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3,856.9 |
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3,691.5 |
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— |
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3,691.5 |
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As of June 30, 2025 |
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Cash and cash equivalents |
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$ |
13.1 |
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$ |
13.1 |
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$ |
13.1 |
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$ |
— |
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Notes payable |
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1,009.5 |
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1,009.5 |
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— |
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1,009.5 |
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Long-term debt, including current portion |
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3,890.9 |
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3,671.7 |
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— |
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3,671.7 |
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Spire Missouri |
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As of June 30, 2026 |
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Notes payable – associated companies |
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$ |
443.5 |
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$ |
443.5 |
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$ |
— |
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$ |
443.5 |
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Long-term debt |
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2,153.6 |
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2,037.4 |
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— |
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2,037.4 |
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As of September 30, 2025 |
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Notes payable – associated companies |
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$ |
566.3 |
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$ |
566.3 |
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$ |
— |
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$ |
566.3 |
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Long-term debt |
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1,953.6 |
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1,874.0 |
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— |
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1,874.0 |
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As of June 30, 2025 |
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Notes payable – associated companies |
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$ |
398.7 |
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$ |
398.7 |
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$ |
— |
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$ |
398.7 |
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Long-term debt |
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1,953.2 |
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1,847.4 |
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— |
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1,847.4 |
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Spire Alabama |
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As of June 30, 2026 |
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Cash and cash equivalents |
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$ |
2.8 |
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$ |
2.8 |
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$ |
2.8 |
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$ |
— |
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Notes payable – associated companies |
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168.2 |
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168.2 |
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— |
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168.2 |
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Long-term debt |
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712.0 |
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659.2 |
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— |
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659.2 |
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As of September 30, 2025 |
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Cash and cash equivalents |
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$ |
1.9 |
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$ |
1.9 |
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$ |
1.9 |
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$ |
— |
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Notes payable – associated companies |
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130.1 |
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130.1 |
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— |
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130.1 |
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Long-term debt |
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711.7 |
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675.9 |
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— |
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675.9 |
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As of June 30, 2025 |
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Cash and cash equivalents |
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$ |
1.7 |
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$ |
1.7 |
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$ |
1.7 |
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$ |
— |
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Notes payable – associated companies |
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56.4 |
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56.4 |
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— |
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56.4 |
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Long-term debt, including current portion |
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746.6 |
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695.2 |
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— |
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695.2 |
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