X0508 4 2025-11-18 false 0001126956 SPIRE INC SR 0001988105 Mills Stephen M 700 MARKET STREET ST. LOUIS MO 63101 false true false false SVP, President, Spire MO false Common Stock 2025-11-18 4 F false 83.00 86.16 D 2830.00 D Common Stock 2025-11-18 4 A false 588.00 86.16 A 3418.00 D Common Stock 2025-11-18 4 F false 277.00 86.16 D 3141.00 D Common Stock 2025-11-18 4 A false 710.00 86.16 A 3953.97 D Phantom Stock 2025-11-18 4 A false 590.00 86.16 A Common Stock 590.00 1680.00 D Phantom Stock 2025-11-18 4 F false 14.00 86.16 D Common Stock 14.00 1666.00 D Phantom Stock 2025-11-18 4 A false 175.00 86.16 A Common Stock 175.00 1841.00 D Phantom Stock 2025-11-18 4 F false 5.00 86.16 D Common Stock 5.00 1836.00 D Represents the number of shares withheld for the payment of taxes incident to the vesting of 175 shares of time-vested restricted stock. Represents the number of shares of phantom stock withheld for the payment of taxes incident to the vesting of 175 shares of vested time-vested restricted stock. The beginning balance accounts for 885 shares that were reported on the initial Form 3 but were omitted from the reporting person's subsequently filed Form 4s. Represents performance contingent restricted units that vested and settled in stock based on performance metrics not tied to the market price of the Company's stock. Represents the number of shares withheld for the payment of taxes incident to the vesting of 588 shares of performance contingent restricted stock units. Represents award of time-vested restricted stock that vests November 18, 2028. Includes shares acquired through the Dividend Reinvestment Plan. Represents phantom stock vesting to the reporting person pursuant to his election to defer into his deferred income plan account 590 shares of performance contingent stock. Each share of phantom stock is the economic equivalent of one share of Spire Inc. common stock. Shares of phantom stock are payable in cash to the reporting person in January 2027 and can be transferred to other investments within the reporting person's deferred income plan account at any time at least six months after vesting. Represents the number of shares of phantom stock withheld for the payment of taxes incident to the vesting of 590 shares of vested performance contingent stock. Represents phantom stock vesting to the reporting person pursuant to his election to defer into his deferred income plan account 175 shares of time-vested restricted stock. Each share of phantom stock is the economic equivalent of one share of Spire Inc. common stock. Shares of phantom stock are payable in cash to the reporting person in January 2027 and can be transferred to other investments within the reporting person's deferred income plan account at any time at least six months after vesting. /s/ Courtney Vomund as attorney in fact for Mills, Stephen M. 2025-11-19