Energizing the Future

Spire MO 2022 rate case On April 1, Spire Missouri filed a new general rate case, seeking recovery of: - Our full, updated cost of service, including deferred overhead costs Increased capital investment Filing seeks fair and reasonable rate of return, based on 45% 25% 30% - Actual capital structure - ROE in line with market averages and reflective of risk-adjusted capital costs • • • Overheads recovery Rate of return Rate base growth and cost of service $152M revenue request Rate base: $3.4B Rate of return: - ROE: 10.5% - Equity layer: 55% Test period: Calendar 2021 (roll forward prior case from 5/31/21) True-up period end: Sept. 30, 2022 5 Spire | Investor presentation - August 2022

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