Segment Information (Tables)

3 Months Ended

Dec. 31, 2025

Segment Reporting Information [Line Items]

Schedule of Information about Segment Revenue, Segment Expenses and Adjusted Earnings

The following tables present information about Spire’s segment revenue, segment expenses, and Adjusted Earnings.

Three Months Ended December 31, 2025	Gas Utility		Gas Marketing			Midstream		Total Reportable Segments		Other(b)			Intersegment Eliminations			Consolidated
Revenues from external customers	$	693.3	$	41.1		$	26.8	$	761.2	$	1.0		$	—		$	762.2
Intersegment revenues		-		-			12.2		12.2		-			(12.2	)		-
Total Operating Revenues		693.3		41.1			39.0		773.4		1.0			(12.2	)		762.2
Less:
Significant segment expenses:
Cost of gas sold, incl. gross receipts taxes		313.1		40.9			0.8		354.8		—			(12.2	)		342.6
Operation and maintenance expense		119.7		4.0			9.8		133.5		6.4			—			139.9
Depreciation and amortization    expense		74.8		0.1			6.3		81.2		0.2			—			81.4
Interest expense		36.8		—			4.9		41.7		18.7			—			60.4
Income tax expense (benefit)		24.1		(0.8	)		3.9		27.2		(3.8	)		—			23.4
Other segment items (a)		20.9		(7.6	)		0.6		13.9		(7.8	)		—			6.1
Adjusted earnings (loss) [Non-GAAP]	$	103.9	$	4.5		$	12.7	$	121.1	$	(12.7	)	$	—		$	108.4
Capital expenditures		197.1		—			6.1		203.2		(0.4	)		—			202.8

Three Months Ended December 31, 2024	Gas Utility		Gas Marketing			Midstream		Total Reportable Segments		Other(b)			Intersegment Eliminations			Consolidated
Revenues from external customers	$	613.5	$	33.0		$	22.2	$	668.7	$	0.4		$	—		$	669.1
Intersegment revenues		-		-			11.3		11.3		-			(11.3	)		-
Total Operating Revenues		613.5		33.0			33.5		680.0		0.4			(11.3	)		669.1
Less:
Significant segment expenses:
Cost of gas sold, incl. gross receipts taxes		281.3		26.1			0.7		308.1		—			(11.3	)		296.8
Operation and maintenance expense		115.0		4.0			11.0		130.0		(0.7	)		—			129.3
Depreciation and amortization    expense		68.1		0.4			3.7		72.2		0.1			—			72.3
Interest expense		35.1		—			1.2		36.3		11.7			—			48.0
Income tax expense (benefit)		16.1		0.8			3.8		20.7		(0.6	)		—			20.1
Other segment items (a)		20.1		(0.5	)		1.1		20.7		0.8			—			21.5
Adjusted earnings (loss) [Non-GAAP]	$	77.8	$	2.2		$	12.0	$	92.0	$	(10.9	)	$	—		$	81.1
Capital expenditures		217.9		0.1			42.7		260.7		(0.1	)		—			260.6

(a) Other segment items for each reportable segment include fair value and timing adjustments, acquisition and restructuring activities, taxes other than income and gross receipt taxes, and miscellaneous income and deductions.

(b) All other components of the Company's consolidated information include Spire's subsidiaries engaged in risk management, among other activities, and unallocated corporate items, including certain debt and associated interest costs.

Reconciliation of Consolidated Net Economic Earnings to Consolidated Net Income

The following table reconciles the Company’s adjusted earnings to net income.

Reconciliation of Consolidated Net Income to Consolidated Adjusted Earnings	Three Months Ended December 31, 2025			Three Months Ended December 31, 2024
Net Income	$	95.0		$	81.3
Adjustments, pre-tax:
Fair value and timing adjustments		9.2			(0.3	)
Acquisition activities		8.5			—
Income tax adjustments		(4.3	)		0.1
Adjusted Earnings	$	108.4		$	81.1

Spire Missouri [Member]

Segment Reporting Information [Line Items]

Schedule of Financial Data Related to Gross Receipt Taxes and Capital Expenditures

Financial data related to gross receipt taxes and capital expenditures are as follows:

	Three Months Ended December 31, 2025		Three Months Ended December 31, 2024
Gross Receipt Taxes		21.7		19.5
Capital Expenditures		148.0		178.3

Spire Alabama Inc [Member]

Segment Reporting Information [Line Items]

Schedule of Financial Data Related to Gross Receipt Taxes and Capital Expenditures

Financial data related to gross receipt taxes and capital expenditures are as follows:

	Three Months Ended December 31, 2025		Three Months Ended December 31, 2024
Gross Receipt Taxes		6.8		5.7
Capital Expenditures		41.3		34.5