10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D. C. 20549

FORM 10-Q

(Mark One)

☒	QUARTERLY REPORT PURSUANT TO SECTION 13 or 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2024
	or
☐	TRANSITION REPORT PURSUANT TO SECTION 13 or 15 (d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from                           to

Commission File Number	Name of Registrant, Address of Principal Executive Offices and Telephone Number	State of Incorporation	I.R.S. Employer Identification Number
1-16681	Spire Inc. 700 Market Street St. Louis, MO 63101 314-342-0500	Missouri	74-2976504
1-1822	Spire Missouri Inc. 700 Market Street St. Louis, MO 63101 314-342-0500	Missouri	43-0368139
2-38960	Spire Alabama Inc. 605 Richard Arrington Blvd N Birmingham, AL 35203 205-326-8100	Alabama	63-0022000

Securities registered pursuant to Section 12(b) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) (only applicable for Spire Inc.):

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock $1.00 par value	SR	New York Stock Exchange LLC
Depositary Shares, each representing a 1/1,000th interest in a share of 5.90% Series A Cumulative Redeemable Perpetual Preferred Stock, par value $25.00 per share	SR.PRA	New York Stock Exchange LLC

Indicate by check mark whether each registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Exchange Act during the preceding 12 months (or for such shorter period that the registrant was required to file such report) and (2) has been subject to such filing requirements for the past 90 days.

Spire Inc.	Yes ☒	No ☐
Spire Missouri Inc.	Yes ☒	No ☐
Spire Alabama Inc.	Yes ☒	No ☐

Indicate by check mark whether each registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

Spire Inc.	Yes ☒	No ☐
Spire Missouri Inc.	Yes ☒	No ☐
Spire Alabama Inc.	Yes ☒	No ☐

Indicate by check mark whether each registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

	Large accelerated filer	Accelerated filer	Non- accelerated filer	Smaller reporting company	Emerging growth company
Spire Inc.	X
Spire Missouri Inc.			X
Spire Alabama Inc.			X

If an emerging growth company, indicate by check mark if each registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

Spire Inc.	☐
Spire Missouri Inc.	☐
Spire Alabama Inc.	☐

Indicate by check mark whether each registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

Spire Inc.	Yes ☐	No ☒
Spire Missouri Inc.	Yes ☐	No ☒
Spire Alabama Inc.	Yes ☐	No ☒

The number of shares outstanding of each registrant’s common stock as of April 28, 2024, was as follows:

Spire Inc.	Common Stock, par value $1.00 per share	57,747,978
Spire Missouri Inc.	Common Stock, par value $1.00 per share (all owned by Spire Inc.)	25,855
Spire Alabama Inc.	Common Stock, par value $0.01 per share (all owned by Spire Inc.)	1,972,052

Spire Missouri Inc. and Spire Alabama Inc. meet the conditions set forth in General Instructions H(1)(a) and (b) to Form 10-Q and are therefore filing this Form 10-Q with the reduced disclosure format specified in General Instructions H(2) to Form 10-Q.

This combined Form 10-Q represents separate filings by Spire Inc., Spire Missouri Inc., and Spire Alabama Inc. Information contained herein relating to an individual registrant is filed by that registrant on its own behalf. Each registrant makes no representation as to information relating to the other registrants, except that information relating to Spire Missouri Inc. and Spire Alabama Inc. are also attributed to Spire Inc.

TABLE OF CONTENTS
		Page No.
GLOSSARY		2
PART I. FINANCIAL INFORMATION
Item 1	Financial Statements (Unaudited)
	Spire Inc.
	Condensed Consolidated Statements of Income	4
	Condensed Consolidated Statements of Comprehensive Income	5
	Condensed Consolidated Balance Sheets	6
	Condensed Consolidated Statements of Shareholders’ Equity	8
	Condensed Consolidated Statements of Cash Flows	10
	Spire Missouri Inc.
	Condensed Statements of Comprehensive Income	11
	Condensed Balance Sheets	12
	Condensed Statements of Shareholder’s Equity	14
	Condensed Statements of Cash Flows	15
	Spire Alabama Inc.
	Condensed Statements of Income	16
	Condensed Balance Sheets	17
	Condensed Statements of Shareholder’s Equity	19
	Condensed Statements of Cash Flows	20
	Notes to Financial Statements
	Note 1. Summary of Significant Accounting Policies	21
	Note 2. Revenue	24
	Note 3. Earnings Per Common Share	25
	Note 4. Shareholders’ Equity	25
	Note 5. Regulatory Matters	26
	Note 6. Financing	30
	Note 7. Fair Value of Financial Instruments	31
	Note 8. Fair Value Measurements	33
	Note 9. Pension Plans and Other Postretirement Benefits	36
	Note 10. Information by Operating Segment	39
	Note 11. Commitments and Contingencies	41
Item 2	Management’s Discussion and Analysis of Financial Condition and Results of Operations	44
Item 3	Quantitative and Qualitative Disclosures About Market Risk	63
Item 4	Controls and Procedures	63
PART II. OTHER INFORMATION
Item 1	Legal Proceedings	64
Item 1A	Risk Factors	64
Item 2	Unregistered Sales of Equity Securities and Use of Proceeds	64
Item 3	Defaults upon Senior Securities	64
Item 4	Mine Safety Disclosures	64
Item 5	Other Information	64
Item 6	Exhibits	65
SIGNATURES		66

1

GLOSSARY OF KEY TERMS AND ABBREVIATIONS

APSC	Alabama Public Service Commission	PGA	Purchased Gas Adjustment
ASC	Accounting Standards Codification	RSE	Rate Stabilization and Equalization
Company	Spire and its subsidiaries unless the context suggests otherwise	SEC	U.S. Securities and Exchange Commission
Degree days	The average of a day’s high and low temperature below 65, subtracted from 65, multiplied by the number of days impacted	Spire	Spire Inc.
FASB	Financial Accounting Standards Board	Spire Alabama	Spire Alabama Inc.
FERC	Federal Energy Regulatory Commission	Spire EnergySouth	Spire EnergySouth Inc., the parent of Spire Gulf and Spire Mississippi
GAAP	Accounting principles generally accepted in the United States of America	Spire Gulf	Spire Gulf Inc.
Gas Marketing	Segment including Spire Marketing, which provides natural gas marketing services	Spire Marketing	Spire Marketing Inc.
Gas Utility	Segment including the operations of the Utilities	Spire Mississippi	Spire Mississippi Inc.
GSA	Gas Supply Adjustment	Spire Missouri	Spire Missouri Inc.
ISRS	Infrastructure System Replacement Surcharge	Spire MoGas Pipeline	Spire MoGas Pipeline LLC, a 263-mile FERC-regulated natural gas pipeline, together with Omega Pipeline, a connected 75-mile gas distribution system in Missouri
Midstream	Segment including Spire Storage, Spire STL Pipeline and Spire MoGas Pipeline	Spire STL Pipeline	Spire STL Pipeline LLC, or the 65-mile FERC-regulated pipeline it constructed and operates to deliver natural gas into eastern Missouri
MoPSC	Missouri Public Service Commission	Spire Storage	The physical natural gas storage operations of Spire Storage West LLC and Spire Storage Salt Plains LLC
MSPSC	Mississippi Public Service Commission	U.S.	United States
O&M	Operation and maintenance expense	Utilities	Spire Missouri, Spire Alabama and the subsidiaries of Spire EnergySouth

2

PART I. FINANCIAL INFORMATION

The interim financial statements included herein have been prepared by three separate registrants — Spire Inc. (“Spire” or the “Company”), Spire Missouri Inc. (“Spire Missouri”) and Spire Alabama Inc. (“Spire Alabama”) — without audit, pursuant to the rules and regulations of the United States Securities and Exchange Commission (SEC). These financial statements should be read in conjunction with the financial statements and the notes thereto included in the registrants’ combined Form 10-K for the fiscal year ended September 30, 2023.

The Financial Information in this Part I includes separate financial statements (i.e., statements of income and comprehensive income, balance sheets, statements of shareholders’ equity and statements of cash flows) for Spire, Spire Missouri and Spire Alabama. The Notes to Financial Statements and Management’s Discussion and Analysis of Financial Condition and Results of Operations are also included and presented herein on a combined basis for Spire, Spire Missouri and Spire Alabama.

3

Item 1. Financial Statements

SPIRE INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(UNAUDITED)

	Three Months Ended March 31,				Six Months Ended March 31,
(In millions, except per share amounts)	2024		2023		2024		2023
Operating Revenues	$	1,128.5	$	1,123.4	$	1,885.1	$	1,937.4
Operating Expenses:
Natural gas		540.8		586.5		907.8		1,005.7
Operation and maintenance		137.8		132.1		268.5		264.2
Depreciation and amortization		68.9		62.6		135.9		124.7
Taxes, other than income taxes		82.4		81.9		135.1		132.3
Total Operating Expenses		829.9		863.1		1,447.3		1,526.9
Operating Income		298.6		260.3		437.8		410.5
Interest Expense, Net		52.2		47.2		102.8		90.8
Other Income, Net		7.3		7.0		24.8		13.0
Income Before Income Taxes		253.7		220.1		359.8		332.7
Income Tax Expense		49.4		40.9		70.4		62.5
Net Income		204.3		179.2		289.4		270.2
Provision for preferred dividends		3.7		3.7		7.4		7.4
Income allocated to participating securities		0.3		0.4		0.4		0.5
Net Income Available to Common Shareholders	$	200.3	$	175.1	$	281.6	$	262.3
Weighted Average Number of Common Shares Outstanding:
Basic		55.8		52.5		54.6		52.5
Diluted		55.9		52.6		54.7		52.6
Basic Earnings Per Common Share	$	3.59	$	3.33	$	5.16	$	5.00
Diluted Earnings Per Common Share	$	3.58	$	3.33	$	5.14	$	4.99

See the accompanying Notes to Financial Statements.

4

SPIRE INC.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(UNAUDITED)

	Three Months Ended March 31,						Six Months Ended March 31,
(In millions)	2024			2023			2024			2023
Net Income	$	204.3		$	179.2		$	289.4		$	270.2
Other Comprehensive Income (Loss), Before Tax:
Cash flow hedging derivative instruments:
Net hedging gain (loss) arising during the period		9.1			(6.8	)		(6.3	)		(9.8	)
Amounts reclassified into regulatory liabilities		—			(17.5	)		—			(17.5	)
Amounts reclassified into net income		(0.6	)		(0.5	)		(9.6	)		(0.8	)
Net gain (loss) on cash flow hedging derivative instruments		8.5			(24.8	)		(15.9	)		(28.1	)
Net gain on defined benefit pension and other postretirement plans		—			0.1			0.1			0.2
Net unrealized gain on available for sale securities		—			—			0.1			—
Other Comprehensive Income (Loss), Before Tax		8.5			(24.7	)		(15.7	)		(27.9	)
Income Tax Expense (Benefit) Related to Items of Other Comprehensive Income (Loss)		2.0			(5.8	)		(3.7	)		(6.6	)
Other Comprehensive Income (Loss), Net of Tax		6.5			(18.9	)		(12.0	)		(21.3	)
Comprehensive Income	$	210.8		$	160.3		$	277.4		$	248.9

See the accompanying Notes to Financial Statements.

5

SPIRE INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(UNAUDITED)

	March 31,			September 30,			March 31,
(Dollars in millions, except per share amounts)	2024			2023			2023
ASSETS
Utility Plant	$	8,480.3		$	8,210.1		$	7,892.4
Less: Accumulated depreciation and amortization		2,509.3			2,431.2			2,358.5
Net Utility Plant		5,971.0			5,778.9			5,533.9
Non-utility Property (net of accumulated depreciation and amortization of $115.9, $71.1 and $60.6 at March 31, 2024, September 30, 2023, and March 31, 2023, respectively)		886.2			628.5			520.4
Other Investments		105.3			102.6			131.3
Total Other Property and Investments		991.5			731.1			651.7
Current Assets:
Cash and cash equivalents		25.6			5.6			6.9
Accounts receivable:
Utility		398.5			192.4			453.7
Other		107.3			128.6			166.0
Allowance for credit losses		(39.1	)		(32.5	)		(40.6	)
Delayed customer billings		54.8			22.0			85.6
Inventories:
Natural gas		159.0			223.7			146.8
Propane gas		8.6			8.6			8.6
Materials and supplies		47.2			47.2			48.9
Regulatory assets		116.9			348.3			143.0
Prepayments		34.1			48.2			32.5
Other		92.8			84.8			60.2
Total Current Assets		1,005.7			1,076.9			1,111.6
Deferred Charges and Other Assets:
Goodwill		1,171.6			1,171.6			1,171.6
Regulatory assets		1,272.7			1,249.2			1,316.7
Other		298.9			305.9			263.5
Total Deferred Charges and Other Assets		2,743.2			2,726.7			2,751.8
Total Assets	$	10,711.4		$	10,313.6		$	10,049.0

6

SPIRE INC.

CONDENSED CONSOLIDATED BALANCE SHEETS (Continued)

(UNAUDITED)

	March 31,		September 30,		March 31,
	2024		2023		2023
CAPITALIZATION AND LIABILITIES
Capitalization:
Preferred stock ($25.00 par value per share; 10.0 million depositary shares authorized, issued and outstanding at March 31, 2024, September 30, 2023, and March 31, 2023)	$	242.0	$	242.0	$	242.0
Common stock (par value $1.00 per share; 70.0 million shares authorized; 57.7 million, 53.2 million, and 52.6 million shares issued and outstanding at March 31, 2024, September 30, 2023, and March 31, 2023, respectively)		57.7		53.2		52.6
Paid-in capital		1,899.7		1,616.5		1,576.5
Retained earnings		1,155.3		958.0		1,089.5
Accumulated other comprehensive income		35.6		47.6		25.9
Total Shareholders' Equity		3,390.3		2,917.3		2,986.5
Temporary equity		10.3		16.5		18.8
Long-term debt (less current portion)		3,421.4		3,554.0		3,702.5
Total Capitalization		6,822.0		6,487.8		6,707.8
Current Liabilities:
Current portion of long-term debt		307.0		156.6		256.6
Notes payable		786.0		955.5		561.0
Accounts payable		193.4		253.1		232.3
Advance customer billings		6.1		20.9		6.8
Wages and compensation accrued		40.2		47.0		38.6
Customer deposits		29.4		27.7		28.3
Taxes accrued		82.6		104.1		79.9
Regulatory liabilities		25.1		7.3		5.3
Other		180.5		183.2		198.1
Total Current Liabilities		1,650.3		1,755.4		1,406.9
Deferred Credits and Other Liabilities:
Deferred income taxes		816.6		743.7		737.9
Pension and postretirement benefit costs		130.0		137.3		158.6
Asset retirement obligations		589.7		577.4		531.5
Regulatory liabilities		557.7		472.4		360.3
Other		145.1		139.6		146.0
Total Deferred Credits and Other Liabilities		2,239.1		2,070.4		1,934.3
Commitments and Contingencies (Note 11)
Total Capitalization and Liabilities	$	10,711.4	$	10,313.6	$	10,049.0

See the accompanying Notes to Financial Statements.

7

SPIRE INC.

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY

(UNAUDITED)

	Common Stock					Preferred		Paid-in			Retained
(Dollars in millions)	Shares			Par		Stock		Capital			Earnings			AOCI*			Total
Three Months Ended March 31, 2024:
Balance at December 31, 2023		54,973,694		$	55.0	$	242.0	$	1,727.4		$	997.3		$	29.1		$	3,050.8
Net income		—			—		—		—			204.3			—			204.3
Common stock issued		2,745,733			2.7		—		170.5			—			—			173.2
Dividend reinvestment plan		6,437			—		—		0.4			—			—			0.4
Stock-based compensation costs		—			—		—		1.5			—			—			1.5
Stock activity under stock-based compensation plans		16,810			—		—		—			—			—			—
Employees’ tax withholding for stock-based compensation		(982	)		—		—		(0.1	)		—			—			(0.1	)
Temporary equity adjustment to redemption value		—			—		—		—			0.5			—			0.5
Dividends declared:
Common stock ($0.755 per share)		—			—		—		—			(43.1	)		—			(43.1	)
Preferred stock ($0.36875 per depositary share)		—			—		—		—			(3.7	)		—			(3.7	)
Other comprehensive income, net of tax		—			—		—		—			—			6.5			6.5
Balance at March 31, 2024		57,741,692		$	57.7	$	242.0	$	1,899.7		$	1,155.3		$	35.6		$	3,390.3
Six Months Ended March 31, 2024:
Balance at September 30, 2023		53,170,224		$	53.2	$	242.0	$	1,616.5		$	958.0		$	47.6		$	2,917.3
Net income		—			—		—		—			289.4			—			289.4
Common stock issued		4,490,282			4.4		—		281.6			—			—			286.0
Dividend reinvestment plan		13,211			—		—		0.8			—			—			0.8
Stock-based compensation costs		—			—		—		2.4			—			—			2.4
Stock activity under stock-based compensation plans		92,516			0.1		—		(0.1	)		—			—			—
Employees’ tax withholding for stock-based compensation		(24,541	)		—		—		(1.5	)		—			—			(1.5	)
Temporary equity adjustment to redemption value		—			—		—		—			(1.4	)		—			(1.4	)
Dividends declared:
Common stock ($1.51 per share)		—			—		—		—			(83.3	)		—			(83.3	)
Preferred stock ($0.7375 per depositary share)		—			—		—		—			(7.4	)		—			(7.4	)
Other comprehensive loss, net of tax		—			—		—		—			—			(12.0	)		(12.0	)
Balance at March 31, 2024		57,741,692		$	57.7	$	242.0	$	1,899.7		$	1,155.3		$	35.6		$	3,390.3

8

SPIRE INC.

CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY (Continued)

(UNAUDITED)

	Common Stock					Preferred		Paid-in			Retained
	Shares			Par		Stock		Capital			Earnings			AOCI*			Total
Three Months Ended March 31, 2023:
Balance at December 31, 2022		52,541,696		$	52.5	$	242.0	$	1,571.8		$	953.0		$	44.8		$	2,864.1
Net income		—			—		—		—			179.2			—			179.2
Common stock issued		40,500			0.1		—		2.9			—			—			3.0
Dividend reinvestment plan		5,421			—		—		0.3			—			—			0.3
Stock-based compensation costs		—			—		—		1.5			—			—			1.5
Stock activity under stock-based compensation plans		6,008			—		—		—			—			—			—
Employees’ tax withholding for stock-based compensation		(192	)		—		—		—			—			—			—
Temporary equity adjustment to redemption value		—			—		—		—			(1.3	)		—			(1.3	)
Dividends declared:
Common stock ($0.72 per share)		—			—		—		—			(37.7	)		—			(37.7	)
Preferred stock ($0.36875 per depositary share)		—			—		—		—			(3.7	)		—			(3.7	)
Other comprehensive loss, net of tax		—			—		—		—			—			(18.9	)		(18.9	)
Balance at March 31, 2023		52,593,433		$	52.6	$	242.0	$	1,576.5		$	1,089.5		$	25.9		$	2,986.5
Six Months Ended March 31, 2023:
Balance at September 30, 2022		52,494,543		$	52.5	$	242.0	$	1,571.3		$	905.5		$	47.2		$	2,818.5
Net income		—			—		—		—			270.2			—			270.2
Common stock issued		40,500			0.1		—		2.9			—			—			3.0
Dividend reinvestment plan		11,121			—		—		0.7			—			—			0.7
Stock-based compensation costs		—			—		—		2.9			—			—			2.9
Stock activity under stock-based compensation plans		64,686			—		—		—			—			—			—
Employees’ tax withholding for stock-based compensation		(17,417	)		—		—		(1.3	)		—			—			(1.3	)
Temporary equity adjustment to redemption value		—			—		—		—			(3.0	)		—			(3.0	)
Dividends declared:
Common stock ($1.44 per share)		—			—		—		—			(75.8	)		—			(75.8	)
Preferred stock ($0.7375 per depository share)		—			—		—		—			(7.4	)		—			(7.4	)
Other comprehensive loss, net of tax		—			—		—		—			—			(21.3	)		(21.3	)
Balance at March 31, 2023		52,593,433		$	52.6	$	242.0	$	1,576.5		$	1,089.5		$	25.9		$	2,986.5

* Accumulated other comprehensive income (loss)

See the accompanying Notes to Financial Statements.

9

SPIRE INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(UNAUDITED)

	Six Months Ended March 31,
(In millions)	2024			2023
Operating Activities:
Net Income	$	289.4		$	270.2
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		135.9			124.7
Deferred income taxes and investment tax credits		69.5			62.5
Changes in assets and liabilities:
Accounts receivable		(175.4	)		43.7
Inventories		64.8			218.2
Regulatory assets and liabilities		317.6			(35.5	)
Accounts payable		(34.6	)		(372.9	)
Delayed/advance customer billings, net		(47.7	)		(76.3	)
Taxes accrued		(21.5	)		(10.8	)
Other assets and liabilities		(41.7	)		(50.6	)
Other		3.1			6.7
Net cash provided by operating activities		559.4			179.9
Investing Activities:
Capital expenditures		(409.3	)		(307.8	)
Business acquisitions, net of cash acquired		(177.4	)		(37.1	)
Other		2.8			4.2
Net cash used in investing activities		(583.9	)		(340.7	)
Financing Activities:
Issuance of long-term debt		175.0			755.0
Repayment of long-term debt		(156.6	)		(31.2	)
Repayment of short-term debt, net		(169.5	)		(476.5	)
Issuance of common stock		286.8			3.6
Dividends paid on common stock		(80.5	)		(74.5	)
Dividends paid on preferred stock		(7.4	)		(7.4	)
Other		(2.7	)		(7.5	)
Net cash provided by financing activities		45.1			161.5
Net Increase in Cash, Cash Equivalents, and Restricted Cash		20.6			0.7
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period		25.8			20.5
Cash, Cash Equivalents, and Restricted Cash at End of Period	$	46.4		$	21.2
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	$	(102.9	)	$	(80.5	)
Income taxes		(0.9	)		(1.4	)

See the accompanying Notes to Financial Statements.

10

SPIRE MISSOURI INC.

CONDENSED STATEMENTS OF COMPREHENSIVE INCOME

(UNAUDITED)

	Three Months Ended March 31,				Six Months Ended March 31,
(In millions)	2024		2023		2024		2023
Operating Revenues	$	766.5	$	791.0	$	1,301.9	$	1,332.2
Operating Expenses:
Natural gas		443.7		465.7		736.3		782.4
Operation and maintenance		78.6		77.4		153.5		154.5
Depreciation and amortization		43.1		39.2		85.2		77.8
Taxes, other than income taxes		59.8		61.2		98.3		97.6
Total Operating Expenses		625.2		643.5		1,073.3		1,112.3
Operating Income		141.3		147.5		228.6		219.9
Interest Expense, Net		27.7		24.6		55.6		46.6
Other Income, Net		5.7		5.9		12.9		10.9
Income Before Income Taxes		119.3		128.8		185.9		184.2
Income Tax Expense		14.1		16.7		23.7		24.8
Net Income		105.2		112.1		162.2		159.4
Other Comprehensive Income, Net of Tax		—		0.1		0.1		0.2
Comprehensive Income	$	105.2	$	112.2	$	162.3	$	159.6

See the accompanying Notes to Financial Statements.

11

SPIRE MISSOURI INC.

CONDENSED BALANCE SHEETS

(UNAUDITED)

	March 31,			September 30,			March 31,
(Dollars in millions, except per share amounts)	2024			2023			2023
ASSETS
Utility Plant	$	5,193.5		$	4,964.9		$	4,731.2
Less: Accumulated depreciation and amortization		1,088.1			1,043.2			1,027.1
Net Utility Plant		4,105.4			3,921.7			3,704.1
Other Property and Investments		67.8			65.7			66.7
Current Assets:
Cash and cash equivalents		—			0.8			—
Accounts receivable:
Utility		307.6			142.6			362.0
Associated companies		2.1			1.3			3.8
Other		23.8			21.1			32.5
Allowance for credit losses		(32.0	)		(26.2	)		(34.5	)
Delayed customer billings		53.6			17.9			84.5
Inventories:
Natural gas		101.9			132.8			86.7
Propane gas		8.6			8.6			8.6
Materials and supplies		24.0			24.2			24.4
Regulatory assets		89.2			293.1			62.7
Prepayments		17.0			26.7			18.5
Total Current Assets		595.8			642.9			649.2
Deferred Charges and Other Assets:
Goodwill		210.2			210.2			210.2
Regulatory assets		630.5			617.6			722.0
Other		145.2			147.4			107.2
Total Deferred Charges and Other Assets		985.9			975.2			1,039.4
Total Assets	$	5,754.9		$	5,605.5		$	5,459.4

12

SPIRE MISSOURI INC.

CONDENSED BALANCE SHEETS (Continued)

(UNAUDITED)

	March 31,			September 30,			March 31,
	2024			2023			2023
CAPITALIZATION AND LIABILITIES
Capitalization:
Paid-in capital and common stock (par value $1.00 per share; 50.0 million shares authorized; 25,855, 25,855, and 25,325 shares issued and outstanding at March 31, 2024, September 30, 2023, and March 31, 2023, respectively)	$	854.9		$	854.9		$	816.2
Retained earnings		1,154.6			992.4			1,061.3
Accumulated other comprehensive loss		(2.4	)		(2.5	)		(2.5	)
Total Shareholder's Equity		2,007.1			1,844.8			1,875.0
Long-term debt (less current portion)		1,486.2			1,785.4			1,784.5
Total Capitalization		3,493.3			3,630.2			3,659.5
Current Liabilities:
Current portion of long-term debt		300.0			—			250.0
Notes payable		200.0			—			200.0
Notes payable – associated companies		243.9			540.6			60.7
Accounts payable		78.7			85.8			78.8
Accounts payable – associated companies		9.5			10.5			11.3
Advance customer billings		—			11.0			—
Wages and compensation accrued		19.9			23.6			20.4
Customer deposits		5.9			5.8			6.0
Taxes accrued		47.0			60.3			47.2
Other		44.6			48.7			52.5
Total Current Liabilities		949.5			786.3			726.9
Deferred Credits and Other Liabilities:
Deferred income taxes		563.9			531.8			533.3
Pension and postretirement benefit costs		100.5			103.3			99.8
Asset retirement obligations		113.4			111.1			112.8
Regulatory liabilities		475.3			389.4			276.9
Other		59.0			53.4			50.2
Total Deferred Credits and Other Liabilities		1,312.1			1,189.0			1,073.0
Commitments and Contingencies (Note 11)
Total Capitalization and Liabilities	$	5,754.9		$	5,605.5		$	5,459.4

See the accompanying Notes to Financial Statements.

13

SPIRE MISSOURI INC.

CONDENSED STATEMENTS OF SHAREHOLDER’S EQUITY

(UNAUDITED)

	Common Stock				Paid-in		Retained
(Dollars in millions)	Shares		Par		Capital		Earnings			AOCI*			Total
Three Months Ended March 31, 2024:
Balance at December 31, 2023		25,855	$	0.1	$	854.8	$	1,049.4		$	(2.4	)	$	1,901.9
Net income		—		—		—		105.2			—			105.2
Balance at March 31, 2024		25,855	$	0.1	$	854.8	$	1,154.6		$	(2.4	)	$	2,007.1
Six Months Ended March 31, 2024:
Balance at September 30, 2023		25,855	$	0.1	$	854.8	$	992.4		$	(2.5	)	$	1,844.8
Net income		—		—		—		162.2			—			162.2
Other comprehensive income, net of tax		—		—		—		—			0.1			0.1
Balance at March 31, 2024		25,855	$	0.1	$	854.8	$	1,154.6		$	(2.4	)	$	2,007.1
Three Months Ended March 31, 2023:
Balance at December 31, 2022		25,325	$	0.1	$	816.1	$	979.2		$	(2.6	)	$	1,792.8
Net income		—		—		—		112.1			—			112.1
Dividends declared		—		—		—		(30.0	)		—			(30.0	)
Other comprehensive income, net of tax		—		—		—		—			0.1			0.1
Balance at March 31, 2023		25,325	$	0.1	$	816.1	$	1,061.3		$	(2.5	)	$	1,875.0
Six Months Ended March 31, 2023:
Balance at September 30, 2022		25,325	$	0.1	$	816.1	$	931.9		$	(2.7	)	$	1,745.4
Net income		—		—		—		159.4			—			159.4
Dividends declared		—		—		—		(30.0	)		—			(30.0	)
Other comprehensive income, net of tax		—		—		—		—			0.2			0.2
Balance at March 31, 2023		25,325	$	0.1	$	816.1	$	1,061.3		$	(2.5	)	$	1,875.0

* Accumulated other comprehensive income (loss)

See the accompanying Notes to Financial Statements.

14

SPIRE MISSOURI INC.

CONDENSED STATEMENTS OF CASH FLOWS

(UNAUDITED)

	Six Months Ended March 31,
(In millions)	2024			2023
Operating Activities:
Net Income	$	162.2		$	159.4
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		85.2			77.8
Deferred income taxes and investment tax credits		23.3			24.8
Changes in assets and liabilities:
Accounts receivable		(162.6	)		(208.9	)
Inventories		31.1			126.2
Regulatory assets and liabilities		276.5			0.6
Accounts payable		2.2			(31.5	)
Delayed/advance customer billings, net		(46.7	)		(75.4	)
Taxes accrued		(13.2	)		(3.2	)
Other assets and liabilities		(10.2	)		(47.4	)
Other		0.8			0.8
Net cash provided by operating activities		348.6			23.2
Investing Activities:
Capital expenditures		(255.1	)		(206.6	)
Other		2.4			1.8
Net cash used in investing activities		(252.7	)		(204.8	)
Financing Activities:
Issuance of long-term debt		—			400.0
Issuance of short-term debt, net		200.0			200.0
Repayments of borrowings from Spire, net		(296.7	)		(384.5	)
Dividends paid		—			(30.0	)
Other		—			(3.9	)
Net cash (used in) provided by financing activities		(96.7	)		181.6
Net Decrease in Cash and Cash Equivalents		(0.8	)		—
Cash and Cash Equivalents at Beginning of Period		0.8			—
Cash and Cash Equivalents at End of Period	$	—		$	—
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	$	(60.9	)	$	(44.1	)
Income taxes		(0.4	)		—

See the accompanying Notes to Financial Statements.

15

SPIRE ALABAMA INC.

CONDENSED STATEMENTS OF INCOME

(UNAUDITED)

	Three Months Ended March 31,				Six Months Ended March 31,
(In millions)	2024		2023		2024		2023
Operating Revenues	$	259.5	$	218.3	$	401.6	$	370.7
Operating Expenses:
Natural gas		85.6		61.8		141.4		131.2
Operation and maintenance		35.4		34.5		69.6		69.6
Depreciation and amortization		18.2		17.0		36.1		34.0
Taxes, other than income taxes		17.9		16.1		28.1		26.7
Total Operating Expenses		157.1		129.4		275.2		261.5
Operating Income		102.4		88.9		126.4		109.2
Interest Expense, Net		8.3		9.0		17.6		17.3
Other Income, Net		0.4		0.3		0.7		0.7
Income Before Income Taxes		94.5		80.2		109.5		92.6
Income Tax Expense		23.8		20.2		27.7		23.4
Net Income	$	70.7	$	60.0	$	81.8	$	69.2

See the accompanying Notes to Financial Statements.

16

SPIRE ALABAMA INC.

CONDENSED BALANCE SHEETS

(UNAUDITED)

	March 31,			September 30,			March 31,
(Dollars in millions, except per share amounts)	2024			2023			2023
ASSETS
Utility Plant	$	2,900.7		$	2,862.6		$	2,781.4
Less: Accumulated depreciation and amortization		1,307.4			1,273.0			1,208.7
Net Utility Plant		1,593.3			1,589.6			1,572.7
Current Assets:
Cash and cash equivalents		1.8			1.2			1.0
Accounts receivable:
Utility		74.0			42.2			75.4
Associated companies		—			1.2			0.8
Other		6.8			6.6			5.3
Allowance for credit losses		(6.2	)		(5.7	)		(5.3	)
Delayed customer billings		1.0			3.6			1.0
Inventories:
Natural gas		34.1			52.4			41.4
Materials and supplies		19.2			19.1			20.5
Regulatory assets		14.9			41.6			64.8
Prepayments		3.3			6.4			3.8
Total Current Assets		148.9			168.6			208.7
Deferred Charges and Other Assets:
Regulatory assets		619.1			606.9			568.3
Other		84.2			84.2			81.9
Total Deferred Charges and Other Assets		703.3			691.1			650.2
Total Assets	$	2,445.5		$	2,449.3		$	2,431.6

17

SPIRE ALABAMA INC.

CONDENSED BALANCE SHEETS (Continued)

(UNAUDITED)

	March 31,		September 30,		March 31,
	2024		2023		2023
CAPITALIZATION AND LIABILITIES
Capitalization:
Paid-in capital and common stock (par value $0.01 per share; 3.0 million shares authorized; 2.0 million shares issued and outstanding)	$	279.4	$	285.9	$	289.9
Retained earnings		687.5		642.1		645.3
Total Shareholder's Equity		966.9		928.0		935.2
Long-term debt		746.1		745.9		745.7
Total Capitalization		1,713.0		1,673.9		1,680.9
Current Liabilities:
Notes payable – associated companies		37.4		124.1		121.3
Accounts payable		28.4		28.4		29.8
Accounts payable – associated companies		5.4		4.6		7.0
Advance customer billings		4.7		8.1		5.3
Wages and compensation accrued		5.6		6.6		5.4
Customer deposits	20.5			19.3		19.6
Taxes accrued		28.8		34.5		26.4
Regulatory liabilities		18.7		—		—
Other		14.1		14.7		15.7
Total Current Liabilities		163.6		240.3		230.5
Deferred Credits and Other Liabilities:
Deferred income taxes		36.8		9.1		12.3
Pension and postretirement benefit costs		22.5		27.2		52.8
Asset retirement obligations		460.6		451.0		406.9
Regulatory liabilities		20.1		21.2		21.5
Other		28.9		26.6		26.7
Total Deferred Credits and Other Liabilities		568.9		535.1		520.2
Commitments and Contingencies (Note 11)
Total Capitalization and Liabilities	$	2,445.5	$	2,449.3	$	2,431.6

See the accompanying Notes to Financial Statements.

18

SPIRE ALABAMA INC.

CONDENSED STATEMENTS OF SHAREHOLDER’S EQUITY

(UNAUDITED)

	Common Stock				Paid-in			Retained
(Dollars in millions)	Shares		Par		Capital			Earnings			Total
Three Months Ended March 31, 2024:
Balance at December 31, 2023		1,972,052	$	—	$	284.9		$	639.2		$	924.1
Net income		—		—		—			70.7			70.7
Return of capital to Spire		—		—		(5.5	)		—			(5.5	)
Dividends declared		—		—		—			(22.4	)		(22.4	)
Balance at March 31, 2024		1,972,052	$	—	$	279.4		$	687.5		$	966.9
Six Months Ended March 31, 2024:
Balance at September 30, 2023		1,972,052	$	—	$	285.9		$	642.1		$	928.0
Net income		—		—		—			81.8			81.8
Return of capital to Spire		—		—		(6.5	)		—			(6.5	)
Dividends declared		—		—		—			(36.4	)		(36.4	)
Balance at March 31, 2024		1,972,052	$	—	$	279.4		$	687.5		$	966.9
Three Months Ended March 31, 2023:
Balance at December 31, 2022		1,972,052	$	—	$	305.4		$	595.3		$	900.7
Net income		—		—		—			60.0			60.0
Return of capital to Spire		—		—		(15.5	)		—			(15.5	)
Dividends declared		—		—		—			(10.0	)		(10.0	)
Balance at March 31, 2023		1,972,052	$	—	$	289.9		$	645.3		$	935.2
Six Months Ended March 31, 2023:
Balance at September 30, 2022		1,972,052	$	—	$	316.9		$	589.1		$	906.0
Net income		—		—		—			69.2			69.2
Return of capital to Spire		—		—		(27.0	)		—			(27.0	)
Dividends declared		—		—		—			(13.0	)		(13.0	)
Balance at March 31, 2023		1,972,052	$	—	$	289.9		$	645.3		$	935.2

See the accompanying Notes to Financial Statements.

19

SPIRE ALABAMA INC.

CONDENSED STATEMENTS OF CASH FLOWS

(UNAUDITED)

	Six Months Ended March 31,
(In millions)	2024			2023
Operating Activities:
Net Income	$	81.8		$	69.2
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		36.1			34.0
Deferred income taxes and investment tax credits		27.7			23.4
Changes in assets and liabilities:
Accounts receivable		(30.4	)		(4.8	)
Inventories		18.2			26.9
Regulatory assets and liabilities		40.4			(32.3	)
Accounts payable		2.9			(39.2	)
Delayed/advance customer billings		(0.8	)		(0.7	)
Taxes accrued		(5.7	)		(4.9	)
Other assets and liabilities		3.1			12.6
Other		0.2			0.2
Net cash provided by operating activities		173.5			84.4
Investing Activities:
Capital expenditures		(43.6	)		(72.9	)
Other		0.3			0.7
Net cash used in investing activities		(43.3	)		(72.2	)
Financing Activities:
Issuance of long-term debt		—			175.0
Repayments of borrowings from Spire, net		(86.7	)		(139.6	)
Return of capital to Spire		(6.5	)		(27.0	)
Dividends paid		(36.4	)		(21.0	)
Other		—			(1.0	)
Net cash used in financing activities		(129.6	)		(13.6	)
Net Increase (Decrease) in Cash and Cash Equivalents		0.6			(1.4	)
Cash and Cash Equivalents at Beginning of Period		1.2			2.4
Cash and Cash Equivalents at End of Period	$	1.8		$	1.0
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	$	(17.7	)	$	(12.6	)
Income taxes		—			—

See the accompanying Notes to Financial Statements.

20

SPIRE INC., SPIRE MISSOURI INC. AND SPIRE ALABAMA INC.

NOTES TO FINANCIAL STATEMENTS

(UNAUDITED)

(Dollars in millions, except per share amounts)

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

BASIS OF PRESENTATION – These notes are an integral part of the accompanying unaudited financial statements of Spire Inc. (“Spire” or the “Company”) presented on a consolidated basis, Spire Missouri Inc. (“Spire Missouri”) and Spire Alabama Inc. (“Spire Alabama”). Spire Missouri, Spire Alabama and Spire EnergySouth Inc. (“Spire EnergySouth”) are wholly owned subsidiaries of Spire. Spire Missouri, Spire Alabama and the subsidiaries of Spire EnergySouth (Spire Gulf Inc. and Spire Mississippi Inc.) are collectively referred to as the “Utilities.”

The accompanying unaudited financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) for interim financial information with the instructions to Form 10-Q and Rule 10-01 of Regulation S‑X. Accordingly, they do not include all the disclosures required for complete financial statements. In the opinion of management, the accompanying unaudited financial statements include all adjustments necessary for the fair presentation of the results of operations for the periods presented. This Form 10-Q should be read in conjunction with the Notes to Financial Statements contained in Spire, Spire Missouri and Spire Alabama’s combined Annual Report on Form 10-K for the fiscal year ended September 30, 2023.

The consolidated financial position, results of operations, and cash flows of Spire include the accounts of the Company and all its subsidiaries. Transactions and balances between consolidated entities have been eliminated from the consolidated financial statements of Spire. In compliance with GAAP, transactions between Spire Missouri and Spire Alabama and their affiliates, as well as intercompany balances on their balance sheets, have not been eliminated from their separate financial statements.

NATURE OF OPERATIONS – Spire has three reportable segments: Gas Utility, Gas Marketing, and Midstream. The Gas Utility segment consists of the regulated natural gas distribution operations of the Company and is the core business segment of Spire in terms of revenue and earnings. The Gas Utility segment is comprised of the operations of: Spire Missouri, serving St. Louis, Kansas City, and other areas in Missouri; Spire Alabama, serving central and northern Alabama; and the subsidiaries of Spire EnergySouth, serving the Mobile, Alabama area and south-central Mississippi. The Gas Marketing segment includes Spire’s largest gas-related business, Spire Marketing Inc. (“Spire Marketing”), which provides non-regulated natural gas services throughout the United States (U.S.). The Midstream segment includes Spire Storage, Spire STL Pipeline and Spire MoGas Pipeline, which are subsidiaries engaged in the storage and transportation of natural gas. The activities of the Company’s other subsidiaries are reported as Other and are described in Note 10, Information by Operating Segment. Spire Missouri and Spire Alabama each have a single reportable segment. 

The Company’s earnings are derived primarily from its Gas Utility segment. Due to the seasonal nature of the Utilities’ business and the volumetric Spire Missouri rate design, earnings are typically concentrated during the heating season of November through April each fiscal year. As a result, the interim statements of income for Spire, Spire Missouri and Spire Alabama are not necessarily indicative of annual results or representative of succeeding quarters of the fiscal year.

21

 

REGULATED OPERATIONS – The Utilities account for their regulated operations in accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 980, Regulated Operations. This topic sets forth the application of GAAP for those companies whose rates are established by or are subject to approval by an independent third-party regulator. The provisions of this accounting guidance require, among other things, that financial statements of a regulated enterprise reflect the actions of regulators, where appropriate. These actions may result in the recognition of revenues and expenses in time periods that are different than non-regulated enterprises. When this occurs, costs are deferred as assets in the balance sheet (regulatory assets) and recorded as expenses when those amounts are reflected in rates. In addition, regulators can impose liabilities upon a regulated company for amounts previously collected from customers and for recovery of costs that are expected to be incurred in the future (regulatory liabilities). Management believes that the current regulatory environment supports the continued use of these regulatory accounting principles and that all regulatory assets and regulatory liabilities are recoverable or refundable through the regulatory process.

As authorized by the Missouri Public Service Commission (MoPSC), the Mississippi Public Service Commission (MSPSC) and the Alabama Public Service Commission (APSC), the Purchased Gas Adjustment (PGA) clauses and Gas Supply Adjustment (GSA) riders allow the Utilities to pass through to customers the cost of purchased gas supplies. Regulatory assets and liabilities related to the PGA clauses and the GSA riders are both labeled Unamortized Purchased Gas Adjustments herein. See additional information about regulatory assets and liabilities in Note 5, Regulatory Matters.

DERIVATIVES – In the course of their business, certain subsidiaries of Spire enter into commitments associated with the purchase or sale of natural gas. Certain of their derivative natural gas contracts are designated as normal purchases or normal sales and, as such, are excluded from the scope of FASB ASC Topic 815, Derivatives and Hedging. Those contracts are accounted for as executory contracts and recorded on an accrual basis. Revenues and expenses from such contracts are recorded gross. Contracts not designated as normal purchases or normal sales are recorded as derivatives with changes in fair value recognized in earnings in the periods prior to physical delivery. Certain of Spire Marketing’s wholesale purchase and sale transactions are classified as trading activities for financial reporting purposes, with income and expenses presented on a net basis in natural gas expenses in the Condensed Consolidated Statements of Income. Spire also enters into cash flow hedges through execution of interest rate swap contracts to protect itself against adverse movements in interest rates. In the first quarter of fiscal 2024, Spire management determined it was probable the anticipated issuance of certain debt, and therefore the hedged forecasted interest payments, would not occur. The related swap was settled, hedge accounting was discontinued, and amounts previously deferred in “Accumulated other comprehensive income” were reclassified to earnings, such that the entire realized gain of $8.2 was included in “Other income” for Spire Inc. in the quarter ended December 31, 2023.

TRANSACTIONS WITH AFFILIATES – Transactions between affiliates of the Company have been eliminated from the consolidated financial statements of Spire. As reflected in their separate financial statements, Spire Missouri and Spire Alabama borrowed funds from the Company and incurred related interest. Spire Missouri and Spire Alabama also participated in normal intercompany shared services transactions. Spire Missouri’s and Spire Alabama’s other transactions with affiliates are presented below:

	Three Months Ended March 31,				Six Months Ended March 31,
	2024		2023		2024		2023
Spire Missouri
Purchases of natural gas from Spire Marketing	$	5.6	$	13.8	$	10.6	$	42.3
Transportation services received from Spire STL Pipeline		8.3		7.8		16.5		15.9
Transportation services received from Spire MoGas Pipeline		1.4		—		1.4		—
Sales of natural gas to Spire Marketing		0.3		0.1		0.3		0.1
Natural gas storage services from Spire Storage Salt Plains LLC		0.4		—		0.7		—
Spire Alabama
Purchases of natural gas from Spire Marketing	$	—	$	—	$	3.4	$	1.1

22

 

RESTRICTED CASH AND OTHER INVESTMENTS – In Spire’s statement of cash flows for the period ended March 31, 2024, total Cash, Cash Equivalents, and Restricted Cash included $20.8, $20.2 and $14.3 of restricted cash reported in “Other Investments” on the Company’s balance sheet as of March 31, 2024,  September 30, 2023, and March 31, 2023, respectively (in addition to amounts shown as “Cash and cash equivalents”). This restricted cash has been segregated and invested in debt securities in a trust account based on collateral requirements for reinsurance at Spire’s risk management company.

BUSINESS COMBINATIONS – On January 19, 2024, a subsidiary in Spire’s Midstream segment acquired MoGas Pipeline, an interstate natural gas pipeline, and Omega Pipeline, a connected gas distribution system in Missouri, to better serve customers in Missouri. MoGas interconnects with Spire STL Pipeline and other regional pipelines to deliver gas to Spire Missouri’s growing customer base in St. Charles, Franklin, and western St. Louis counties, among other utility, municipal, industrial and commercial customers. Omega owns and operates an approximately 75-mile natural gas distribution system within Fort Leonard Wood in south-central Missouri and is interconnected with the MoGas system. The acquisition was accounted for as a business combination in accordance with ASC 805, Business Combinations. The $177.6 preliminary cash consideration transferred is subject to further working capital adjustments as provided in the purchase agreement. This preliminary purchase price was allocated entirely to property, plant and equipment based on their estimated fair value at the acquisition date and recorded as non-utility property in the consolidated balance sheet. The operating revenues and operating income of MoGas and Omega were not material to our consolidated results for the three and six months ended March 31, 2024.

ACCRUED CAPITAL EXPENDITURES – Accrued capital expenditures, shown in the following table, are excluded from capital expenditures in the statements of cash flows until paid.

	March 31,		September 30,		March 31,
	2024		2023		2023
Spire	$	80.4	$	104.3	$	66.3
Spire Missouri		47.2		56.5		35.4
Spire Alabama		2.7		4.6		5.2

ACCOUNTS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES – Trade accounts receivable are recorded at the amounts due from customers, including unbilled amounts. Accounts receivable are written off when they are deemed to be uncollectible. An allowance for expected credit losses is estimated and updated based on relevant data and trends such as accounts receivable aging, historical write-off experience, current write-off trends, economic conditions, and the impact of weather and availability of customer payment assistance on collection trends. For the Utilities, net write-offs as a percentage of revenue has historically been the best predictor of base net write-off experience over time. Management judgment is applied in the development of the allowance due to the complexity of variables and subjective nature of certain relevant factors. The accounts receivable of Spire’s non-utility businesses are evaluated separately from those of the Utilities. The allowance for credit losses for those other businesses is based on a continuous evaluation of the individual counterparty risk and is not significant for the periods presented. Activity in the allowance for credit losses is shown in the following table.

	Spire						Spire Missouri						Spire Alabama
Three Months Ended March 31,	2024			2023			2024			2023			2024			2023
Allowance at beginning of period	$	35.4		$	34.5		$	28.9		$	28.2		$	5.7		$	5.5
Provision for expected credit losses		7.9			8.2			6.2			7.3			1.4			0.5
Write-offs, net of recoveries		(4.2	)		(2.1	)		(3.1	)		(1.0	)		(0.9	)		(0.7	)
Allowance at end of period	$	39.1		$	40.6		$	32.0		$	34.5		$	6.2		$	5.3
Six Months Ended March 31,	2024			2023			2024			2023			2024			2023
Allowance at beginning of period	$	32.5		$	31.9		$	26.2		$	24.9		$	5.7		$	6.3
Provision for expected credit losses		12.0			12.3			9.8			11.1			1.7			0.7
Write-offs, net of recoveries		(5.4	)		(3.6	)		(4.0	)		(1.5	)		(1.2	)		(1.7	)
Allowance at end of period	$	39.1		$	40.6		$	32.0		$	34.5		$	6.2		$	5.3

23

 

2. REVENUE

The following tables show revenue disaggregated by source and customer type.

	Three Months Ended March 31,						Six Months Ended March 31,
	2024			2023			2024			2023
Spire
Gas Utility:
Residential	$	729.5		$	730.2		$	1,222.3		$	1,248.2
Commercial and industrial		267.9			260.3			425.8			430.9
Transportation		36.8			33.3			69.4			64.2
Off-system and other incentive		13.0			6.1			19.4			13.7
Other customer revenue		8.2			4.3			13.7			8.7
Total revenue from contracts with customers		1,055.4			1,034.2			1,750.6			1,765.7
Changes in accrued revenue under alternative revenue programs	17.3				20.3			37.3			21.8
Total Gas Utility operating revenues		1,072.7			1,054.5			1,787.9			1,787.5
Gas Marketing		46.0			60.6			82.3			134.7
Midstream		21.5			16.5			36.4			31.7
Other		4.1			4.1			8.2			8.1
Total before eliminations		1,144.3			1,135.7			1,914.8			1,962.0
Intersegment eliminations (see Note 10, Information by Operating Segment)		(15.8	)		(12.3	)		(29.7	)		(24.6	)
Total Operating Revenues	$	1,128.5		$	1,123.4		$	1,885.1		$	1,937.4

Spire Missouri
Residential	$	532.9	$	570.0	$	921.7	$	970.6
Commercial and industrial		185.7		185.2		295.9		308.1
Transportation		10.1		9.9		19.1		19.0
Off-system and other incentive		12.3		4.5		16.4		9.6
Other customer revenue		5.0		4.3		7.5		6.3
Total revenue from contracts with customers		746.0		773.9		1,260.6		1,313.6
Changes in accrued revenue under alternative revenue programs	20.5			17.1		41.3		18.6
Total Operating Revenues	$	766.5	$	791.0	$	1,301.9	$	1,332.2

Spire Alabama
Residential	$	169.3		$	135.1		$	253.7		$	231.4
Commercial and industrial		68.8			61.5			103.5			95.1
Transportation	24.0			20.8			44.8				40.1
Off-system and other incentive		0.7			1.7			3.0			4.1
Other customer revenue		0.7			0.7			1.6			1.9
Total revenue from contracts with customers		263.5			219.8			406.6			372.6
Changes in accrued revenue under alternative revenue programs		(4.0	)		(1.5	)		(5.0	)		(1.9	)
Total Operating Revenues	$	259.5		$	218.3		$	401.6		$	370.7

24

 

Gross receipts taxes associated with the Company’s natural gas utility services are imposed on the Company, Spire Missouri, and Spire Alabama and billed to its customers. The expense amounts (shown in the table below) are reported gross in the “Taxes, other than income taxes” line in the statements of income, and corresponding revenues are reported in “Operating Revenues.”

	Three Months Ended March 31,				Six Months Ended March 31,
	2024		2023		2024		2023
Spire	$	60.0	$	60.2	$	91.1	$	90.6
Spire Missouri		44.0		45.6		66.5		67.7
Spire Alabama		14.1		12.6		21.0		19.4

3. EARNINGS PER COMMON SHARE

	Three Months Ended March 31,				Six Months Ended March 31,
	2024		2023		2024		2023
Basic Earnings Per Common Share:
Net Income	$	204.3	$	179.2	$	289.4	$	270.2
Less: Provision for preferred dividends		3.7		3.7		7.4		7.4
Income allocated to participating securities		0.3		0.4		0.4		0.5
Income Available to Common Shareholders	$	200.3	$	175.1	$	281.6	$	262.3
Weighted Average Common Shares Outstanding (in millions)		55.8		52.5		54.6		52.5
Basic Earnings Per Common Share	$	3.59	$	3.33	$	5.16	$	5.00
Diluted Earnings Per Common Share:
Net Income	$	204.3	$	179.2	$	289.4	$	270.2
Less: Provision for preferred dividends		3.7		3.7		7.4		7.4
Income allocated to participating securities		0.3		0.4		0.4		0.5
Income Available to Common Shareholders	$	200.3	$	175.1	$	281.6	$	262.3
Weighted Average Common Shares Outstanding (in millions)		55.8		52.5		54.6		52.5
Dilutive Effect of forward sales of common stock, restricted stock and restricted stock units (in millions)*		0.1		0.1		0.1		0.1
Weighted Average Diluted Common Shares (in millions)		55.9		52.6		54.7		52.6
Diluted Earnings Per Common Share	$	3.58	$	3.33	$	5.14	$	4.99
* Calculation excludes certain outstanding or potential common shares (shown in millions by period at the right) attributable to (1) forward sales of common stock, (2) stock units subject to performance or market conditions and (3) restricted stock, which could have a dilutive effect in the future		0.4		0.5		0.3		0.4

4. SHAREHOLDERS’ EQUITY

ATM Program

Under Spire’s “at-the-market” (ATM) equity distribution agreement and as authorized by its board of directors, the Company may offer and sell, from time to time, shares of its common stock (including shares of common stock that may be sold pursuant to forward sale agreements entered into in connection with the ATM equity distribution agreement). Settled sales under this ATM program are included in “Common stock issued” in the Condensed Consolidated Statements of Shareholders’ Equity. Specifically in the first quarter of fiscal 2024, on December 11, 2023, 1,744,549 shares were settled, generating $112.2 of net proceeds. On January 25, 2024, Spire’s board approved a new authorization for the sale of additional shares with an aggregate offering price of up to $200.0 through January 2027.

25

 

In the second quarter of fiscal 2024, Spire executed forward sale agreements for 204,405 shares of its common stock, which must be settled on or before September 27, 2024. No shares of common stock have been settled under the forward sale agreements. Had all shares under the forward agreements been settled as of March 31, 2024, it would have generated net proceeds of $12.1.

Equity Units

In February 2021, Spire issued 3.5 million equity units, initially in the form of Corporate Units (as defined in the Underwriting Agreement, dated February 9, 2021, filed as Exhibit 1.1 to the Company's Current Report on Form 8-K filed on February 16, 2021). Each Corporate Unit was comprised of (i) a purchase contract obligating the holder to purchase from the Company for a price in cash of fifty dollars, on the purchase contract settlement date ( March 1, 2024, subject to earlier termination or settlement), a certain number of shares of the Company’s common stock and (ii) a 1/20th, or 5%, undivided beneficial ownership interest in one thousand dollars principal amount of the Company’s 2021 Series A 0.75% Remarketable Senior Notes due 2026 (further discussed in Note 6, Financing). Each Corporate Unit purchase contract obligated holders to purchase a variable number of shares of common stock of the Company based on the applicable market value, subject to anti-dilution adjustments. As of March 1, 2024, the applicable market value was calculated to be $58.6809 per share, and after adjustment the holders were obligated to purchase 0.7845 shares of common stock. The Corporate Unit holders purchased an aggregate of 2,745,733 shares of common stock (net of fractional shares) for $175.0, settled on March 5, 2024.

5. REGULATORY MATTERS

As explained in Note 1, Summary of Significant Accounting Policies, the Utilities account for regulated operations in accordance with FASB ASC Topic 980, Regulated Operations. The following regulatory assets and regulatory liabilities were reflected in the balance sheets of the Company, Spire Missouri and Spire Alabama as of March 31, 2024, September 30, 2023, and March 31, 2023.

	March 31,		September 30,		March 31,
Spire	2024		2023		2023
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	81.4	$	293.2	$	115.3
Other		35.5		55.1		27.7
Total Current Regulatory Assets		116.9		348.3		143.0
Noncurrent:
Pension and postretirement benefit costs		251.4		261.0		273.1
Cost of removal		649.2		633.2		516.4
Future income taxes due from customers		146.6		144.5		139.3
Energy efficiency		58.2		56.3		59.4
Unamortized purchased gas adjustments		—		23.0		181.3
Other		167.3		131.2		147.2
Total Noncurrent Regulatory Assets		1,272.7		1,249.2		1,316.7
Total Regulatory Assets	$	1,389.6	$	1,597.5	$	1,459.7
Regulatory Liabilities:
Current:
Unamortized purchased gas adjustments	$	19.8	$	—	$	—
Other		5.3		7.3		5.3
Total Current Regulatory Liabilities		25.1		7.3		5.3
Noncurrent:
Deferred taxes due to customers		120.9		128.0		135.8
Pension and postretirement benefit costs		192.6		185.2		161.0
Accrued cost of removal		133.5		126.6		34.6
Unamortized purchased gas adjustments		90.8		11.2		—
Other		19.9		21.4		28.9
Total Noncurrent Regulatory Liabilities		557.7		472.4		360.3
Total Regulatory Liabilities	$	582.8	$	479.7	$	365.6

26

 

	March 31,		September 30,		March 31,
Spire Missouri	2024		2023		2023
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	81.0	$	269.4	$	58.7
Other		8.2		23.7		4.0
Total Current Regulatory Assets		89.2		293.1		62.7
Noncurrent:
Future income taxes due from customers		138.5		136.2		130.9
Pension and postretirement benefit costs		183.6		189.1		195.5
Energy efficiency		58.2		56.3		59.4
Unamortized purchased gas adjustments		—		23.0		181.3
Cost of removal		97.0		97.0		24.2
Other		153.2		116.0		130.7
Total Noncurrent Regulatory Assets		630.5		617.6		722.0
Total Regulatory Assets	$	719.7	$	910.7	$	784.7
Regulatory Liabilities:
Noncurrent:
Deferred taxes due to customers	$	108.3	$	114.8	$	121.3
Pension and postretirement benefit costs		165.4		156.5		132.7
Accrued cost of removal		95.8		90.4		—
Unamortized purchased gas adjustments		90.8		11.2		—
Other		15.0		16.5		22.9
Total Noncurrent Regulatory Liabilities		475.3		389.4		276.9
Total Regulatory Liabilities	$	475.3	$	389.4	$	276.9

	March 31,		September 30,		March 31,
Spire Alabama	2024		2023		2023
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	—	$	21.7	$	53.6
Other		14.9		19.9		11.2
Total Current Regulatory Assets		14.9		41.6		64.8
Noncurrent:
Future income taxes due from customers		1.9		2.0		2.0
Pension and postretirement benefit costs		64.2		67.8		73.1
Cost of removal		552.2		536.2		492.2
Other		0.8		0.9		1.0
Total Noncurrent Regulatory Assets		619.1		606.9		568.3
Total Regulatory Assets	$	634.0	$	648.5	$	633.1
Regulatory Liabilities:
Current:
Unamortized purchased gas adjustments	$	18.7	$	—	$	—
Total Current Regulatory Liabilities		18.7		—		—
Noncurrent:
Pension and postretirement benefit costs		16.8		17.9		18.0
Other		3.3		3.3		3.5
Total Noncurrent Regulatory Liabilities		20.1		21.2		21.5
Total Regulatory Liabilities	$	38.8	$	21.2	$	21.5

27

 

A portion of the Company’s and Spire Missouri’s regulatory assets are not earning a return, as shown in the table below:

	March 31,		September 30,		March 31,
	2024		2023		2023
Spire
Pension and postretirement benefit costs	$	133.8	$	133.4	$	127.8
Future income taxes due from customers		144.7		142.5		137.2
Unamortized purchased gas adjustments		81.0		292.4		240.0
Other		127.7		104.2		102.4
Total Regulatory Assets Not Earning a Return	$	487.2	$	672.5	$	607.4
Spire Missouri
Pension and postretirement benefit costs	$	133.8	$	133.4	$	127.8
Future income taxes due from customers		138.5		136.2		130.9
Unamortized purchased gas adjustments		81.0		292.4		240.0
Other		127.7		104.2		102.4
Total Regulatory Assets Not Earning a Return	$	481.0	$	666.2	$	601.1

Like all the Company’s regulatory assets, these regulatory assets as of March 31, 2024 are expected to be recovered from customers in future rates. The recovery period for the future income taxes due from customers and pension and other postretirement benefit costs could be 20 years or longer, based on current Internal Revenue Service guidelines and average remaining service life of active participants, respectively. The recovery period for the PGA assets is less than two years. The other items not earning a return are expected to be recovered over a period not to exceed 15 years, consistent with precedent set by the MoPSC, except for certain debt costs expected to be recovered over the related debt term, up to 35 years. Spire Alabama does not have any regulatory assets that are not earning a return.

Spire Missouri

In 2022, the MoPSC initiated their annual ACA dockets (GR-2022-0135 and GR-2022-0136) to audit gas commodity and transportation costs for the 2020-2021 heating season, which included the impact of a period of unusually severe cold weather in mid- February 2021 (“Winter Storm Uri”) on Spire Missouri’s natural gas portfolio. In December 2022, the MoPSC staff filed its Reports and Recommendations in these cases proposing various disallowances relating to imbalance cash-outs and an off-system sale. In  January 2023, Spire Missouri filed its response to this proposal setting forth its position that there is no basis in law or fact for either disallowance. In  November 2023, Spire Missouri filed an unopposed settlement stipulation by which the MoPSC Staff agreed to withdraw its recommendation of a proposed disallowance relating to imbalance cash-outs. In April 2024, Spire Missouri and the MoPSC Staff reached an agreement in principle to resolve the proposed off-system sale disallowance, and the parties are working to finalize a settlement stipulation which is not expected to impact historically reported results.

The Infrastructure System Replacement Surcharge (ISRS) allows Spire Missouri expedited recovery for its investment to replace qualifying components of its infrastructure without the necessity of a formal rate case. All prior ISRS revenues were reset to zero as of December 26, 2022 as a result of Spire Missouri’s most recent base rate case. In  April 2023, the MoPSC approved an annual ISRS revenue increase of $7.7, effective May 6, 2023, reflecting eligible pipe replacement from October 2022 through February 2023. In October 2023, the MoPSC approved an incremental annual ISRS revenue increase of $12.4, effective October 23, 2023, reflecting eligible pipe replacement from March 2023 through August 2023. On January 17, 2024, Spire Missouri initiated an ISRS case reflecting eligible capital projects from September 2023 through February 2024. After Spire Missouri's true-up filing in March 2024, the MoPSC approved in April 2024, an incremental revenue increase of $16.8, for a total cumulative ISRS revenue of $36.9, tentatively expected to be effective in May 2024.

In fiscal 2023, the MoPSC approved increases in the PGA in Spire Missouri’s tariff effective in November 2022 and January 2023. In fiscal 2024, the MoPSC approved a slight decrease in the PGA in Spire Missouri’s western service territory tariff effective in November 2023 and no change in the eastern service territory. These modifications reflect changes in natural gas commodity prices. Deferred gas balances remaining from prior periods were also reflected in the recently approved tariff rates and have been almost fully recovered as of March 31, 2024.

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Spire Alabama

In the first quarter of fiscal 2023, Spire Alabama made its annual Rate Stabilization and Equalization (RSE) rate filing with the APSC, presenting the utility’s budget for the fiscal year ended September 30, 2023, and new rates designed to provide an annual revenue increase of $15.0 became effective January 1, 2023. On October 26, 2023, Spire Alabama made its annual RSE rate filing, presenting the utility’s budget for the fiscal year ending September 30, 2024. After an amended filing on December 27, 2023, new rates designed to provide an annual revenue increase of $14.3 became effective January 1, 2024.

Spire Alabama’s rate schedules for natural gas distribution charges contain a GSA rider which permits the pass-through to customers of changes in the cost of gas supply. In fiscal 2023, GSA rate increases were effective December 1, 2022 and  January 1, 2023, and in fiscal 2024, GSA rate decreases were effective October 1, 2023,  January 1, 2024, and April 1, 2024, primarily attributable to changes in natural gas commodity prices.

Spire

In addition to those discussed above for Spire Missouri and Spire Alabama, Spire is affected by the following regulatory matters.

On October 26, 2022, Spire Gulf made its annual RSE filing (based on its budget for fiscal 2023), which was reviewed by the APSC and the Alabama Attorney General’s Office (AGO) resulting in an amended RSE filing made on December 21, 2022 reflecting an increase in annual revenues of $2.5 effective January 1, 2023. Spire Gulf’s April 30, 2023 RSE point of test filing reflected that its projected return on average common equity (RCE) exceeded the allowed RCE, resulting in an annualized refund of $1.8 that became effective July 1, 2023. Spire Gulf’s September 30, 2023 RSE point of test reflected that its actual RCE still exceeded the allowed RCE, resulting in an additional annualized refund of $2.0 that became effective December 13, 2023. On October 26, 2023, Spire Gulf made its annual RSE filing (based on its budget for fiscal 2024). Following review by the APSC and AGO, Spire Gulf made an amended RSE filing on December 12, 2023 reflecting a further increase in annual revenues of $2.7 which became effective December 13, 2023.

On September 14, 2022, Spire Mississippi filed its Rate Stabilization Adjustment Rider (RSA) with the Mississippi Public Service Commission (MSPSC) for the rate year ended June 30, 2022, and the MSPSC, by its order dated December 6, 2022, approved a stipulation agreement between the Mississippi Public Utility Staff and Spire Mississippi that provides for a $0.8 increase in annual revenues through rates that became effective on January 1, 2023. Similarly, on September 1, 2023, Spire Mississippi filed its RSA with the MSPSC for the rate year ended June 30, 2023, and the MSPSC, by its order dated December 14, 2023, approved a stipulation agreement between the Mississippi Public Utility Staff and Spire Mississippi that provides for another $0.8 increase in annual revenues through rates that became effective on January 1, 2024.

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6. FINANCING

Short-term

Spire, Spire Missouri and Spire Alabama have a syndicated revolving credit facility pursuant to a loan agreement with 12 banks through July 22, 2027. The agreement has an aggregate credit commitment of $1,300.0, including sublimits of $450.0 for the Spire holding company, $575.0 for Spire Missouri and $275.0 for Spire Alabama. These sublimits may be reallocated from time to time among the three borrowers within the $1,300.0 aggregate commitment, with commitment fees and interest margins applied for each borrower relative to its credit rating, as well as sustainability rate adjustments based on Spire’s DART (“Days Away Restricted or Transferred”) rate and methane emissions reductions. The Spire holding company may use its line to provide for the funding needs of various subsidiaries. The agreement also contains financial covenants limiting each borrower’s consolidated total debt, including short-term debt, to no more than 70% of its total capitalization. As defined in the line of credit, on March 31, 2024, total debt was less than 65% of total capitalization for each borrower. There were no borrowings against this credit facility as of March 31, 2024.

Spire has a commercial paper program (“CP Program”) pursuant to which it may issue short-term, unsecured commercial paper notes. Amounts available under the CP Program may be borrowed, repaid and re-borrowed from time to time, with the aggregate face or principal amount of the notes outstanding under the CP Program at any time not to exceed $1,300.0. The notes may have maturities of up to 365 days from date of issue.

On January 3, 2024, Spire Missouri entered into a short-term loan agreement with several banks for a $200.0 unsecured term loan due October 3, 2024. Interest accrues at the one-month term secured overnight financing rate (“SOFR”) plus a SOFR adjustment of 0.10% per annum plus a margin of 0.90% per annum. Spire Missouri repaid $50.0 of this loan on April 5, 2024.

Information about short-term borrowings, including Spire Missouri’s and Spire Alabama’s borrowings from Spire, is presented in the following table. As of March 31, 2024, $319.8 of Spire’s CP Program borrowings was used to support lending to the Utilities.

	Spire (Parent Only)			Spire Missouri						Spire Alabama			Spire
	CP			Term			Spire			Spire			Consol-
	Program			Loan			Note			Note			idated
Six Months Ended March 31, 2024
Highest borrowings outstanding	$	1,135.0		$	200.0		$	643.6		$	132.5		$	1,275.0
Lowest borrowings outstanding		554.6			—			234.7			25.2			754.6
Weighted average borrowings		930.6			97.3			469.9			94.5			1,027.9
Weighted average interest rate		5.7	%		6.7	%		5.7	%		5.7	%		5.8	%
As of March 31, 2024
Borrowings outstanding	$	586.0		$	200.0		$	243.9		$	37.4		$	786.0
Weighted average interest rate		5.6	%		6.3	%		5.6	%		5.6	%		5.8	%
As of September 30, 2023
Borrowings outstanding	$	955.5		$	—		$	540.6		$	124.1		$	955.5
Weighted average interest rate		5.6	%		n/a			5.6	%		5.6	%		5.6	%
As of March 31, 2023
Borrowings outstanding	$	361.0		$	200.0		$	60.7		$	121.3		$	561.0
Weighted average interest rate		5.3	%		5.6	%		5.3	%		5.3	%		5.4	%

30

 

Long-term

In February 2024, Spire successfully remarketed on behalf of the selling securityholders the 2021 Series A 0.75% Remarketable Senior Notes due 2026, which were originally issued in February 2021 as a component of the equity units further discussed in Note 4, Shareholders’ Equity. As a result, the interest rate on that original $175.0 obligation was reset to 5.300%. Also in February 2024, Spire sold an additional $175.0 aggregate principal amount of these 5.300% Senior Notes due March 1, 2026, with interest payable semiannually. Spire received net proceeds of $173.5 from this offering.

The long-term debt agreements of Spire, Spire Missouri and Spire Alabama contain customary financial covenants and default provisions. As of March 31, 2024, there were no events of default under these financial covenants.

Interest expense shown on the statements of income is net of the capitalized interest amounts shown in the following table.

	Three Months Ended March 31,				Six Months Ended March 31,
	2024		2023		2024		2023
Spire	$	4.0	$	1.9	$	7.8	$	3.5
Spire Missouri		1.1		0.6		2.3		1.1
Spire Alabama		0.4		0.6		0.8		1.3

7. FAIR VALUE OF FINANCIAL INSTRUMENTS

The carrying amounts of cash and cash equivalents, notes receivable, and short-term debt approximate fair value due to the short maturity of these instruments. The fair values of long-term debt are estimated based on market prices for similar issues. Refer to Note 8, Fair Value Measurements, for information on financial instruments measured at fair value on a recurring basis.

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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 March 31, 2024, September 30, 2023, and March 31, 2023.

					Classification of Estimated Fair Value
	Carrying Amount		Fair Value		Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)
Spire
As of March 31, 2024
Cash and cash equivalents	$	25.6	$	25.6	$	25.6	$	—
Notes payable		786.0		786.0		—		786.0
Long-term debt, including current portion		3,728.4		3,452.0		—		3,452.0
As of September 30, 2023
Cash and cash equivalents	$	5.6	$	5.6	$	5.6	$	—
Notes payable		955.5		955.5		—		955.5
Long-term debt, including current portion		3,710.6		3,270.2		—		3,270.2
As of March 31, 2023
Cash and cash equivalents	$	6.9	$	6.9	$	6.9	$	—
Notes payable		561.0		561.0		—		561.0
Long-term debt, including current portion		3,959.1		3,704.2		—		3,704.2
Spire Missouri
As of March 31, 2024
Notes payable	$	200.0	$	200.0	$	—	$	200.0
Notes payable – associated companies		243.9		243.9		—		243.9
Long-term debt, including current portion		1,786.2		1,649.4		—		1,649.4
As of September 30, 2023
Cash and cash equivalents	$	0.8	$	0.8	$	0.8	$	—
Notes payable – associated companies		540.6		540.6		—		540.6
Long-term debt		1,785.4		1,592.4		—		1,592.4
As of March 31, 2023
Notes payable	$	200.0	$	200.0	$	—	$	200.0
Notes payable – associated companies		60.7		60.7		—		60.7
Long-term debt, including current portion		2,034.5		1,930.2		—		1,930.2
Spire Alabama
As of March 31, 2024
Cash and cash equivalents	$	1.8	$	1.8	$	1.8	$	—
Notes payable – associated companies		37.4		37.4		—		37.4
Long-term debt		746.1		685.3		—		685.3
As of September 30, 2023
Cash and cash equivalents	$	1.2	$	1.2	$	1.2	$	—
Notes payable – associated companies		124.1		124.1		—		124.1
Long-term debt		745.9		648.0		—		648.0
As of March 31, 2023
Cash and cash equivalents	$	1.0	$	1.0	$	1.0	$	—
Notes payable – associated companies		121.3		121.3		—		121.3
Long-term debt		745.7		696.6		—		696.6

32

 

8. FAIR VALUE MEASUREMENTS

The information presented in the following tables categorizes the assets and liabilities in the balance sheets that are accounted for at fair value on a recurring basis in periods subsequent to initial recognition.

The mutual funds included in Level 1 are valued based on exchange-quoted market prices of individual securities.

Derivative instruments included in Level 1 are valued using quoted market prices on the New York Mercantile Exchange (NYMEX) or the Intercontinental Exchange (ICE), and also certain natural gas commodity contracts. Derivative instruments classified in Level 2 include derivatives that are valued using broker or dealer quotation services or published benchmarks whose prices are derived principally from, or are corroborated by, observable market inputs. Also included in Level 2 are certain derivative instruments that have values that are similar to, and correlate with, quoted prices for exchange-traded instruments or in active markets. Derivative instruments included in Level 3 are valued using generally unobservable inputs that are based upon the best information available and reflect management’s assumptions about how market participants would price the asset or liability. There were no Level 3 balances as of March 31, 2024, September 30, 2023, or  March 31, 2023. The Company’s and the Utilities’ policy is to recognize transfers between the levels of the fair value hierarchy, if any, as of the beginning of the interim reporting period in which circumstances change or events occur to cause the transfer.

The mutual funds are included in “Other Investments” on the Company’s balance sheets and in “Other Property and Investments” on Spire Missouri’s balance sheets. Changes in their recurring valuations are recorded as unrealized gains or losses in the corresponding income statement. Derivative assets and liabilities, including receivables and payables associated with cash margin requirements, are presented net in the balance sheets when a legally enforceable netting agreement exists between the Company, Spire Missouri, or Spire Alabama and the counterparty to a derivative contract.

Spire

	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Effects of Netting and Cash Margin Receivables /Payables			Total
As of March 31, 2024
ASSETS
Gas Utility:
U.S. stock/bond mutual funds	$	22.6	$	—	$	—		$	22.6
NYMEX/ICE natural gas contracts		3.7		—		(3.7	)		—
Gasoline and heating oil contracts		—		0.1		(0.1	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		8.6		—		(8.6	)		—
Natural gas commodity contracts		—		62.2		(2.6	)		59.6
Other:
U.S. stock/bond mutual funds		16.6		—		—			16.6
U.S. bonds		17.1		—		—			17.1
Global bonds		1.4		—		—			1.4
Interest rate swaps		—		29.0		—			29.0
Total	$	70.0	$	91.3	$	(15.0	)	$	146.3
LIABILITIES
Gas Utility:
NYMEX/ICE natural gas contracts	$	35.7	$	—	$	(35.7	)	$	—
Gas Marketing:
NYMEX/ICE natural gas contracts		30.7		—		(30.7	)		—
Natural gas commodity contracts		—		25.3		(2.6	)		22.7
Total	$	66.4	$	25.3	$	(69.0	)	$	22.7

33

 

	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Effects of Netting and Cash Margin Receivables /Payables			Total
As of September 30, 2023
ASSETS
Gas Utility:
U.S. stock/bond mutual funds	$	20.4	$	—	$	—		$	20.4
NYMEX/ICE natural gas contracts		6.3		—		(6.3	)		—
Gasoline and heating oil contracts		—		0.1		(0.1	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		10.1		—		(10.1	)		—
Natural gas commodity contracts		—		36.7		(3.6	)		33.1
Other:
U.S. stock/bond mutual funds		37.6		—		—			37.6
Interest rate swaps		—		44.2		—			44.2
Total	$	74.4	$	81.0	$	(20.1	)	$	135.3
LIABILITIES
Gas Utility:
NYMEX/ICE natural gas contracts	$	50.8	$	—	$	(44.0	)	$	6.8
Gas Marketing:
NYMEX/ICE natural gas contracts		21.8		—		(21.8	)		—
Natural gas commodity contracts		—		27.6		(3.6	)		24.0
Total	$	72.6	$	27.6	$	(69.4	)	$	30.8
As of March 31, 2023
ASSETS
Gas Utility:
U.S. stock/bond mutual funds	$	20.7	$	—	$	—		$	20.7
NYMEX/ICE natural gas contracts		0.1		—		(0.1	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		31.9		—		(31.9	)		—
Natural gas commodity contracts *		—		39.2		(1.3	)		37.9
Other:
U.S. stock/bond mutual funds		29.2		—		—			29.2
Interest rate swaps *		—		16.5		—			16.5
Total	$	81.9	$	55.7	$	(33.3	)	$	104.3
LIABILITIES
Gas Utility:
NYMEX/ICE natural gas contracts	$	62.7	$	—	$	(62.7	)	$	—
Gasoline and heating oil contracts		0.5		—		(0.5	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		48.1		—		(48.1	)		—
Natural gas commodity contracts *		—		32.4		(1.3	)		31.1
Other:
Interest rate swaps *		—		2.2		—			2.2
Total	$	111.3	$	34.6	$	(112.6	)	$	33.3

* Subsequent to the issuance of its consolidated financial statements for the quarter ended March 31, 2023, during the fourth quarter of fiscal 2023, the Company identified an error in the fair value level presentation for certain line items in the Fair Value Measurements table. The presentation has been corrected to reflect the impacted line items in Level 2 rather than Level 1 as of March 31, 2023. This immaterial correction did not impact the reported fair values or the consolidated financial statements.

34

 

Spire Missouri

	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Effects of Netting and Cash Margin Receivables /Payables			Total
As of March 31, 2024
ASSETS
U.S. stock/bond mutual funds	$	22.6	$	—	$	—		$	22.6
NYMEX/ICE natural gas contracts		3.7		—		(3.7	)		—
Gasoline and heating oil contracts		—		0.1		(0.1	)		—
Total	$	26.3	$	0.1	$	(3.8	)	$	22.6
LIABILITIES
NYMEX/ICE natural gas contracts	$	35.7	$	—	$	(35.7	)	$	—
As of September 30, 2023
ASSETS
U.S. stock/bond mutual funds	$	20.4	$	—	$	—		$	20.4
NYMEX/ICE natural gas contracts		6.3		—		(6.3	)		—
Gasoline and heating oil contracts		—		0.1		(0.1	)		—
Total	$	26.7	$	0.1	$	(6.4	)	$	20.4
LIABILITIES
NYMEX/ICE natural gas contracts	$	50.8	$	—	$	(44.0	)	$	6.8
As of March 31, 2023
ASSETS
U.S. stock/bond mutual funds	$	20.7	$	—	$	—		$	20.7
NYMEX/ICE natural gas contracts		0.1		—		(0.1	)		—
Total	$	20.8	$	—	$	(0.1	)	$	20.7
LIABILITIES
NYMEX/ICE natural gas contracts	$	62.7	$	—	$	(62.7	)	$	—
Gasoline and heating oil contracts		0.5		—		(0.5	)		—
Total	$	63.2	$	—	$	(63.2	)	$	—

35

9. PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS

Pension Plans

Spire and the Utilities maintain pension plans for their employees.

Spire Missouri and Spire Alabama have non-contributory, defined benefit, trusteed forms of pension plans covering the majority of their employees. Qualified plan assets are comprised of mutual and commingled funds consisting of U.S. equities with varying strategies, global equities, alternative investments, and fixed income investments.

The net periodic pension cost includes components shown in the following tables. The components other than the service costs and regulatory adjustment are presented in “Other Income, Net” in the income statement, except for Spire Alabama’s losses on lump-sum settlements. Such losses are capitalized in regulatory balances and amortized over the remaining actuarial life of individuals in the plan, and that amortization is presented in “Other Income, Net.”

	Three Months Ended March 31,						Six Months Ended March 31,
	2024			2023			2024			2023
Spire
Service cost – benefits earned during the period	$	3.9		$	3.9		$	7.9		$	8.0
Interest cost on projected benefit obligation		6.6			5.9			13.4			12.3
Expected return on plan assets		(6.1	)		(5.7	)		(12.4	)		(12.1	)
Amortization of prior service credit		(1.2	)		(1.2	)		(2.3	)		(2.3	)
Amortization of actuarial loss		1.6			1.6			3.2			3.2
Loss on lump-sum settlements		—			—			—			8.6
Subtotal		4.8			4.5			9.8			17.7
Regulatory adjustment		8.8			10.4			17.5			12.2
Net pension cost	$	13.6		$	14.9		$	27.3		$	29.9
Spire Missouri
Service cost – benefits earned during the period	$	2.6		$	2.9		$	5.2		$	5.7
Interest cost on projected benefit obligation		4.7			4.4			9.5			8.9
Expected return on plan assets		(4.2	)		(4.5	)		(8.5	)		(9.0	)
Amortization of prior service credit		(0.5	)		(0.5	)		(1.0	)		(1.0	)
Amortization of actuarial loss		1.4			1.6			2.9			3.1
Subtotal		4.0			3.9			8.1			7.7
Regulatory adjustment		6.3			8.1			12.6			16.2
Net pension cost	$	10.3		$	12.0		$	20.7		$	23.9
Spire Alabama
Service cost – benefits earned during the period	$	1.1		$	0.8		$	2.3		$	1.9
Interest cost on projected benefit obligation		1.2			0.8			2.5			2.1
Expected return on plan assets		(1.2	)		(0.5	)		(2.4	)		(1.6	)
Amortization of prior service credit		(0.6	)		(0.6	)		(1.2	)		(1.2	)
Amortization of actuarial loss		0.3			0.2			0.5			0.3
Loss on lump-sum settlements		—			—			—			8.6
Subtotal		0.8			0.7			1.7			10.1
Regulatory adjustment		2.3			2.1			4.5			(4.4	)
Net pension cost	$	3.1		$	2.8		$	6.2		$	5.7

36

 

Pursuant to the provisions of Spire Missouri’s and Spire Alabama’s pension plans, pension obligations may be satisfied by monthly annuities, lump-sum cash payments, or special termination benefits. Lump-sum payments are recognized as settlements (which can result in gains or losses) only if the total of such payments exceeds the sum of service and interest costs in a specific year. Special termination benefits, when offered, are also recognized as settlements which can result in gains or losses. For the three and six months ended March 31, 2024, no Spire plans met the criteria for settlement recognition.

For the six months ended March 31, 2023, two Spire Alabama plans met the criteria for settlement recognition. The lump-sum payments recognized as settlements for the remeasurement were $27.5 for the Spire Alabama plans. The lump-sum settlements resulted in a loss of $8.6 for Spire Alabama. The Spire Alabama regulatory tariff requires that settlement losses be amortized over the remaining actuarial life of the individuals in the plan — in this case, 13.4 years for one plan and 12.4 years for the other plan. Therefore, no lump sum settlement expense was recorded in the six months ended March 31, 2023.

Effective December 23, 2021, the pension cost for Spire Missouri’s western territory (“Missouri West”) included in customer rates was reduced from $5.5 to $4.4 per year, the pension cost included in Spire Missouri’s eastern territory (“Missouri East”) customer rates was increased from $29.0 to $32.4 per year. Subsequently, on December 26, 2022, the amount in Missouri East was lowered to $29.9. The difference between these amounts and pension expense as calculated pursuant to the above and that otherwise would be included in the statements of income and statements of comprehensive income is deferred as a regulatory asset or regulatory liability.

Also effective December 23, 2021, Missouri East prepaid pension assets and other postretirement benefits that were previously being included in rates at $21.6 per year for eight years were reduced to $11.0 per year, with the amortization period being reset for another eight years. Missouri West net liability for pension and other postretirement benefits that were previously reducing rates by $3.3 per year for eight years were reduced to a $1.1 reduction in rates per year, with the amortization period being reset for another eight years. Subsequently, on December 26, 2022, Missouri East amortization was lowered to $6.9 and Missouri West to a reduction of $0.8.

The funding policy of the Utilities is to contribute an amount not less than the minimum required by government funding standards, nor more than the maximum deductible amount for federal income tax purposes. Fiscal 2024 contributions to Spire Missouri’s pension plans through March 31, 2024 were $5.0 to the qualified trusts and none to non-qualified plans. Fiscal 2024 contributions to the Spire Alabama pension plans through March 31, 2024 were $5.4. Contributions totaling $16.6 to the qualified trusts of Spire Missouri’s pension plans are anticipated for the remainder of fiscal 2024. Contributions to Spire Alabama’s pension plans for the remainder of fiscal 2024 are anticipated to be $11.0.

Other Postretirement Benefits

Spire and the Utilities provide certain life insurance benefits at retirement. Spire Missouri plans provide for medical insurance after early retirement until age 65. For retirements prior to January 1, 2015, certain Spire Missouri plans provided medical insurance after retirement until death. The Spire Alabama plans provide medical insurance upon retirement until death for certain retirees depending on the type of employee and the date the employee was originally hired.

37

 

The net periodic postretirement benefit cost includes components shown in the following tables. The components other than the service costs and regulatory adjustment are presented in “Other Income, Net” in the income statement, except in the event Spire Alabama incurs losses on lump-sum settlements. Any such losses are capitalized in regulatory balances and amortized over the remaining actuarial life of individuals in the plan, and that amortization is presented in “Other Income, Net.”

	Three Months Ended March 31,						Six Months Ended March 31,
	2024			2023			2024			2023
Spire
Service cost – benefits earned during the period	$	1.0		$	1.2		$	2.1		$	2.4
Interest cost on accumulated postretirement benefit obligation		2.4			2.2			4.5			4.3
Expected return on plan assets		(4.2	)		(3.9	)		(8.2	)		(7.8	)
Amortization of prior service cost		0.1			—			0.2			0.1
Amortization of actuarial gain		(1.1	)		(1.1	)		(2.1	)		(2.1	)
Subtotal		(1.8	)		(1.6	)		(3.5	)		(3.1	)
Regulatory adjustment		0.3			0.2			0.5			0.3
Net postretirement benefit income	$	(1.5	)	$	(1.4	)	$	(3.0	)	$	(2.8	)
Spire Missouri
Service cost – benefits earned during the period	$	0.9		$	1.0		$	1.8		$	2.0
Interest cost on accumulated postretirement benefit obligation		1.7			1.7			3.3			3.3
Expected return on plan assets		(2.7	)		(2.7	)		(5.4	)		(5.3	)
Amortization of prior service cost		0.1			0.1			0.3			0.3
Amortization of actuarial gain		(0.9	)		(0.8	)		(1.8	)		(1.6	)
Subtotal		(0.9	)		(0.7	)		(1.8	)		(1.3	)
Regulatory adjustment		0.7			0.7			1.3			1.3
Net postretirement benefit income	$	(0.2	)	$	—		$	(0.5	)	$	—
Spire Alabama
Service cost – benefits earned during the period	$	0.1		$	0.1		$	0.3		$	0.3
Interest cost on accumulated postretirement benefit obligation		0.6			0.5			1.1			0.9
Expected return on plan assets		(1.3	)		(1.3	)		(2.6	)		(2.5	)
Amortization of prior service credit		—			(0.1	)		(0.1	)		(0.2	)
Amortization of actuarial gain		(0.1	)		(0.2	)		(0.1	)		(0.3	)
Subtotal		(0.7	)		(1.0	)		(1.4	)		(1.8	)
Regulatory adjustment		(0.5	)		(0.4	)		(0.9	)		(0.9	)
Net postretirement benefit income	$	(1.2	)	$	(1.4	)	$	(2.3	)	$	(2.7	)

Missouri and Alabama state laws provide for the recovery in rates of costs accrued pursuant to GAAP provided that such costs are funded through an independent, external funding mechanism. The Utilities have established Voluntary Employees’ Beneficiary Association (VEBA) and Rabbi Trusts as external funding mechanisms. The assets of the VEBA and Rabbi Trusts consist primarily of money market securities and mutual funds invested in stocks and bonds.

Effective December 23, 2021, the $8.6 allowance for recovery in rates for Spire Missouri’s postretirement benefit plans was discontinued. The difference between no recovery in rates and pension expense as calculated pursuant to the above and that otherwise would be included in the statements of income and statements of comprehensive income is deferred as a regulatory asset or regulatory liability. Effective with the resolution of the 2022 Missouri rate case in December 2022, net liabilities for postretirement benefits will reduce rates $0.9 and $0.1 per year for Missouri East and Missouri West, respectively.

The Utilities’ funding policy is to contribute amounts to the trusts equal to the periodic benefit cost calculated pursuant to GAAP as recovered in rates. There have been no contributions to the postretirement plans through March 31, 2024 for Spire Missouri or Spire Alabama, and none are expected to be required for the remainder of the fiscal year.

38

 

10. INFORMATION BY OPERATING SEGMENT

The Company has three reportable segments: Gas Utility, Gas Marketing, and Midstream. The Gas Utility segment is the aggregation of the operations of the Utilities. The Gas Marketing segment includes the results of Spire Marketing, a subsidiary engaged in the non-regulated marketing of natural gas and related activities, including utilizing natural gas storage contracts for providing natural gas sales. The Midstream segment includes Spire Storage, Spire STL Pipeline and Spire MoGas Pipeline, which are subsidiaries engaged in the storage and transportation of natural gas. Other components of the Company’s consolidated information include Spire’s subsidiaries engaged in the operation of a propane pipeline and risk management, among other activities, and unallocated corporate items, including certain debt and associated interest costs.

Accounting policies are described in Note 1, Summary of Significant Accounting Policies. Intersegment transactions include sales of natural gas from Spire Marketing to Spire Missouri, Spire Alabama and Spire Storage, storage services from Spire Storage to Spire Missouri and Spire Marketing, and natural gas transportation services provided by Spire STL Pipeline and Spire MoGas Pipeline to Spire Missouri and Spire Marketing. 

Management evaluates the performance of the operating segments based on the computation of net economic earnings. Net economic earnings exclude from reported net income the after-tax impacts of fair value accounting and timing adjustments associated with energy-related transactions, the impacts of acquisition, divestiture and restructuring activities, and the largely non-cash impacts of impairments and other non-recurring or unusual items such as certain regulatory, legislative, or GAAP standard-setting actions.

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Three Months Ended March 31, 2024
Revenues from external customers	$	1,072.4	$	46.0	$	10.0	$	0.1		$	—		$	1,128.5
Intersegment revenues		0.3		—		11.5		4.0			(15.8	)		—
Total Operating Revenues		1,072.7		46.0		21.5		4.1			(15.8	)		1,128.5
Depreciation and amortization expense		65.4		0.4		3.0		0.1			—			68.9
Interest expense		38.3		—		2.0		22.3			(10.4	)		52.2
Income tax expense (benefit)		41.7		7.6		1.5		(1.4	)		—			49.4
Net economic earnings (loss)		188.0		15.5		3.8		(10.7	)		—			196.6
Capital expenditures		137.3		—		46.0		—			(0.5	)		182.8

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Three Months Ended March 31, 2023
Revenues from external customers	$	1,054.4	$	60.6	$	8.2	$	0.2		$	—		$	1,123.4
Intersegment revenues		0.1		—		8.3		3.9			(12.3	)		—
Total Operating Revenues		1,054.5		60.6		16.5		4.1			(12.3	)		1,123.4
Depreciation and amortization expense		60.2		0.4		2.0		—			—			62.6
Interest expense		35.5		—		1.9		17.0			(7.2	)		47.2
Income tax expense (benefit)		38.9		0.8		1.5		(0.3	)		—			40.9
Net economic earnings (loss)		183.9		21.8		4.2		(10.7	)		—			199.2
Capital expenditures		143.7		—		9.3		—			—			153.0

39

 

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Six Months Ended March 31, 2024
Revenues from external customers	$	1,787.6	$	82.3	$	15.0	$	0.2		$	—		$	1,885.1
Intersegment revenues		0.3		—		21.4		8.0			(29.7	)		—
Total Operating Revenues		1,787.9		82.3		36.4		8.2			(29.7	)		1,885.1
Depreciation and amortization		129.6		0.8		5.3		0.2			—			135.9
Interest Expense		77.3		—		3.8		46.3			(24.6	)		102.8
Income tax expense (benefit)		57.4		11.4		2.1		(0.5	)		—			70.4
Net Economic Earnings (Loss)		263.8		22.7		6.2		(13.4	)		—			279.3
Capital expenditures		312.2		—		98.0		—			(0.9	)		409.3

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Six Months Ended March 31, 2023
Revenues from external customers	$	1,787.4	$	134.7	$	15.0	$	0.3		$	—		$	1,937.4
Intersegment revenues		0.1		—		16.7		7.8			(24.6	)		—
Total Operating Revenues		1,787.5		134.7		31.7		8.1			(24.6	)		1,937.4
Depreciation and amortization		119.9		0.7		3.9		0.2			—			124.7
Interest Expense		67.6		—		3.8		36.5			(17.1	)		90.8
Income tax expense (benefit)		51.3		11.3		2.9		(3.0	)		—			62.5
Net Economic Earnings (Loss)		246.8		47.5		8.0		(18.0	)		—			284.3
Capital expenditures		290.0		0.2		17.0		0.6			—			307.8

The following table reconciles the Company’s net economic earnings (loss) to net income (loss).

	Three Months Ended March 31,						Six Months Ended March 31,
	2024			2023			2024			2023
Net Income	$	204.3		$	179.2		$	289.4		$	270.2
Adjustments, pre-tax:
Fair value and timing adjustments		(10.2	)		26.6			(15.4	)		18.8
Acquisition activities		—			—			1.9			—
Income tax adjustments		2.5			(6.6	)		3.4			(4.7	)
Net Economic Earnings	$	196.6		$	199.2		$	279.3		$	284.3

The Company’s total assets by segment were as follows:

	March 31,			September 30,			March 31,
	2024			2023			2023
Total Assets:
Gas Utility	$	8,646.3		$	8,486.7		$	8,317.6
Gas Marketing		191.4			332.0			335.0
Midstream		845.2			574.3			506.2
Other		2,467.2			2,533.3			1,959.1
Eliminations		(1,438.7	)		(1,612.7	)		(1,068.9	)
Total Assets	$	10,711.4		$	10,313.6		$	10,049.0

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11. COMMITMENTS AND CONTINGENCIES

Commitments

The Company and the Utilities have entered into contracts with various counterparties, expiring on dates through calendar 2039, for the storage, transportation, and supply of natural gas. Minimum payments required under the contracts in place at March 31, 2024, are estimated at $2,107.5, $1,553.2, and $383.9 for the Company, Spire Missouri, and Spire Alabama, respectively. Additional contracts are generally entered into prior to or during the heating season of November through April. The Utilities recover their costs from customers in accordance with their PGA clauses or GSA riders.

A consolidated subsidiary of Spire is a limited partner in Inter-Atlantic Energy Capital Ventures, L.P., an unconsolidated partnership focusing on sustainability initiatives largely tied to the natural gas utility sector. Spire committed to contribute a total of $10.0 of capital to the partnership as and when requested by the general partner. As of March 31, 2024, the remaining unfunded commitment was $4.6.

Contingencies

The Company and the Utilities account for contingencies, including environmental liabilities, in accordance with accounting standards under the loss contingency guidance of ASC Topic 450, Contingencies, when it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated.

In addition to matters noted below, the Company and the Utilities are involved in other litigation, claims, and investigations arising in the normal course of business. Management, after discussion with counsel, believes the final outcome will not have a material effect on the statements of income, balance sheets, and statements of cash flows of the Company, Spire Missouri, or Spire Alabama. However, there is uncertainty in the valuation of pending claims and prediction of litigation results.

The Company and the Utilities own and operate natural gas distribution, transmission, and storage facilities, the operations of which are subject to various environmental laws, regulations, and interpretations. While environmental issues resulting from such operations arise in the ordinary course of business, such issues have not materially affected the Company’s or Utilities’ financial position and results of operations. As environmental laws, regulations, and their interpretations change, the Company or the Utilities may incur additional environmental liabilities that may result in additional costs, which may be material.

In the natural gas industry, many gas distribution companies have incurred environmental liabilities associated with sites they or their predecessor companies formerly owned or operated where manufactured gas operations took place. The Utilities each have former manufactured gas plant (MGP) operations in their respective service territories, some of which are discussed under the Spire Missouri and Spire Alabama headings below. To the extent costs are incurred associated with environmental remediation activities, the Utilities would request authority from their respective regulators to defer such costs (less any amounts received from insurance proceeds or as contributions from other potentially responsible parties (PRPs)) and collect them through future rates.

To date, costs incurred for all Spire MGP sites for investigation, remediation and monitoring have not been material. However, the amount of costs relative to future remedial actions at these and other sites is unknown and may be material. The actual future costs that Spire Missouri and Spire Alabama may incur could be materially higher or lower depending upon several factors, including whether remediation will be required, final selection and regulatory approval of any remedial actions, changing technologies and government regulations, the ultimate ability of other PRPs to pay, and any insurance recoveries.

In 2020, Spire retained an outside consultant to conduct probabilistic cost modeling of its former MGP sites in Missouri and Alabama. The purpose of this analysis was to develop an estimated range of probabilistic future liability for each of their MGP sites. That analysis, completed in March 2021, provided a range of demonstrated possible future expenditures to investigate, monitor and remediate the former MGP sites. Spire Missouri and Spire Alabama have recorded their best estimates of the probable expenditures that relate to these matters. The amount remains immaterial, and Spire Missouri, Spire Alabama and the Company do not expect potential liabilities that may arise from remediating these sites to have a material impact on their future financial condition or results of operations.

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Spire Missouri

Spire Missouri has identified three former MGP sites in the city of St. Louis, Missouri (the “City”) where costs have been incurred and claims have been asserted. Spire Missouri has enrolled two of the sites in the Missouri Department of Natural Resources (MoDNR) Brownfields/Voluntary Cleanup Program (BVCP). The third site is the result of an assertion by the United States Environmental Protection Agency (EPA).

In conjunction with redevelopment of the Carondelet Coke site, Spire Missouri and another former owner of the site entered into an agreement (the “Remediation Agreement”) with the City development agencies, the developer, and an environmental consultant that obligates one of the City agencies and the environmental consultant to remediate the site and obtain a No Further Action (NFA) letter from the MoDNR. The Remediation Agreement also provides for a release of Spire Missouri and the other former site owner from certain liabilities related to the past and current environmental condition of the site and requires the developer and the environmental consultant to maintain certain insurance coverage, including remediation cost containment, premises pollution liability, and professional liability. The operative provisions of the Remediation Agreement were triggered on December 20, 2010, on which date Spire Missouri and the other former site owner, as full consideration under the Remediation Agreement, paid a small percentage of the cost of remediation of the site. The property was divided into seven parcels, and MoDNR NFA letters have been received for six of the parcels. Remediation is ongoing on the last parcel.

In a letter dated June 29, 2011, the Attorney General for the State of Missouri informed Spire Missouri that the MoDNR had completed an investigation of the second site, Station A. The Attorney General requested that Spire Missouri participate in the follow up investigations of the site. In a letter dated January 10, 2012, Spire Missouri stated that it would participate in future environmental response activities at the site in conjunction with other PRPs. Accordingly, Spire Missouri entered into a cost sharing agreement for remedial investigation with other PRPs. MoDNR never approved the agreement, so no remedial investigation took place. Recently, Spire Missouri was approached by a real estate developer interested in purchasing the northern half of the Station A site and developing the same for industrial purposes. Consequently, Spire Missouri is now in discussions with the developer, other PRPs and MoDNR to develop a new remedial investigation plan for the site.

Additionally, in correspondence dated November 30, 2016, Region 7 of the EPA has asserted that Spire Missouri is liable under Section 107(a) of the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA) for alleged coal gas waste contamination at a third site, Station B. Spire Missouri and the site owner notified the EPA that information and data provided by the EPA to date does not rise to the level of documenting a threat to the public health or environment. As such, in March 2017 Spire Missouri requested more information from the EPA. Spire Missouri never received a response from the EPA.

Spire Missouri has notified its insurers that it seeks reimbursement for costs incurred in the past and future potential liabilities associated with these MGP sites. While some of the insurers have denied coverage and reserved their rights, Spire Missouri retains the right to seek potential reimbursements from them.

On March 10, 2015, Spire Missouri received a Section 104(e) information request under CERCLA from EPA Region 7 regarding the former Thompson Chemical/Superior Solvents site in the City. In turn, Spire Missouri issued a Freedom of Information Act (FOIA) request to the EPA on April 3, 2015, to identify the basis of the inquiry. The FOIA response from the EPA was received on July 15, 2015, and a response was provided to the EPA on August 15, 2015. Spire Missouri has received no further inquiry from the EPA regarding this matter.

In its western service area, Spire Missouri has six owned MGP sites enrolled in the BVCP, including Joplin MGP #1, St. Joseph MGP #1, Kansas City Coal Gas Station B, Kansas City Station A Railroad area, Kansas City Coal Gas Station A, and Independence MGP #2. Source removal has been conducted at all the owned sites since 2003 with the exception of Joplin. On September 15, 2016, a request was made with the MoDNR for a restrictive covenant use limitation with respect to Joplin. Remediation efforts at the six sites are at various stages of completion, ranging from groundwater monitoring and sampling following source removal activities to the aforementioned request for the Joplin site. As part of its participation in the BVCP, Spire Missouri communicates regularly with the MoDNR with respect to its remediation efforts and monitoring activities at these sites. On May 11, 2015, MoDNR approved the next phase of investigation at the Kansas City Station A Railroad area.

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Spire Alabama

Spire Alabama is in the chain of title of nine former MGP sites, four of which it still owns, and five former manufactured gas distribution sites, one of which it still owns. All are located in the state of Alabama.

In 2011, a removal action was completed and an NFA letter was received at the Huntsville MGP site pursuant to an Administrative Settlement Agreement and Order on Consent among the EPA, Spire Alabama and the current site owner.

In 2012, Spire Alabama responded to an EPA Request for Information Pursuant to Section 104 of CERCLA relating to the 35th Avenue Superfund Site located in North Birmingham, Jefferson County, Alabama. Spire Alabama was identified as a PRP under CERCLA for the cleanup of the site or costs the EPA incurs in cleaning up the site. At this point, Spire Alabama has not been provided information that would allow it to determine the extent, if any, of its potential liability with respect to the 35th Avenue Superfund Site and vigorously denies its inclusion as a PRP.

Assessments were performed by the EPA of the former MGP sites in Gadsden and Anniston, and NFA letters were received after each assessment.

Spire

In addition to those discussed above for Spire Missouri and Spire Alabama, Spire is aware of the following contingent matters.

Spire Marketing, along with many natural gas industry participants, faced the unprecedented effects of Winter Storm Uri in February 2021. Numerous natural gas producers and midstream operators were unable to deliver natural gas to market as they experienced wellhead freeze-offs, power outages and equipment failure due to the extreme weather. These events resulted in supply curtailments, and related notices of force majeure to excuse performance, from and to certain counterparties. Further, these events have made Spire Marketing subject to various commercial disputes (including regarding force majeure). As such, Spire Marketing has recorded an estimate of potential liabilities for damages based on communications with counterparties and the facts and circumstances surrounding each transaction. These estimates are adjusted as new facts emerge or settlement agreements are reached.

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Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations

(Dollars in millions, except per share amounts)

This section analyzes the financial condition and results of operations of Spire Inc. (the “Company”), Spire Missouri Inc., and Spire Alabama Inc. Spire Missouri, Spire Alabama and Spire EnergySouth are wholly owned subsidiaries of the Company. Spire Missouri, Spire Alabama and the subsidiaries of Spire EnergySouth (Spire Gulf and Spire Mississippi) are collectively referred to as the “Utilities.” This section includes management’s view of factors that affect the respective businesses of the Company, Spire Missouri and Spire Alabama, explanations of financial results including changes in earnings and costs from the prior periods, and the effects of such factors on the Company’s, Spire Missouri’s and Spire Alabama’s overall financial condition and liquidity.

Certain matters discussed in this report, excluding historical information, include forward-looking statements. Certain words, such as “may,” “anticipate,” “believe,” “estimate,” “expect,” “intend,” “plan,” “seek,” “target,” and similar words and expressions identify forward-looking statements that involve uncertainties and risks. Future developments may not be in accordance with our current expectations or beliefs and the effect of future developments may not be those anticipated. Among the factors that may cause results or outcomes to differ materially from those contemplated in any forward-looking statement are:

•  Weather conditions and catastrophic events, particularly severe weather in U.S. natural gas producing areas;

•  Volatility in gas prices, particularly sudden and sustained changes in natural gas prices, including the related impact on margin deposits associated with the use of natural gas derivative instruments, and the impact on our competitive position in relation to suppliers of alternative heating sources, such as electricity;

•  Changes in gas supply and pipeline availability, including as a result of decisions by natural gas producers to reduce production or shut in producing natural gas wells and expiration or termination of existing supply and transportation arrangements that are not replaced with contracts with similar terms and pricing, as well as other changes that impact supply for and access to the markets in which our subsidiaries transact business;

•  Acquisitions may not achieve their intended results;

•  Legislative, regulatory and judicial mandates and decisions, some of which may be retroactive, including those affecting:

▪  allowed rates of return and recovery of prudent costs,

▪  incentive regulation,

▪  industry structure,

▪  purchased gas adjustment provisions,

▪  rate design structure and implementation,

▪  capital structures established for rate-setting purposes,

▪  regulatory assets,

▪  non-regulated and affiliate transactions,

▪  franchise renewals,

▪  authorization to operate facilities,

▪  environmental or safety matters, including the potential impact of legislative and regulatory actions related to climate change and pipeline safety and security,

▪  taxes,

▪  pension and other postretirement benefit liabilities and funding obligations, or

▪  accounting standards;

•  The results of litigation;

•  The availability of and access to, in general, funds to meet our debt obligations prior to or when they become due and to fund our operations and necessary capital expenditures, either through (i) cash on hand, (ii) operating cash flow, or (iii) access to the capital markets;

•  Retention of, ability to attract, ability to collect from, and conservation efforts of, customers;

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•  Our ability to comply with all covenants in our indentures and credit facilities, any violations of which, if not cured in a timely manner, could trigger a default of our obligation;

•  Energy commodity market conditions;

•  Discovery of material weakness in internal controls;

•  The disruption, failure or malfunction of our operational and information technology systems, including due to cyberattacks; and

•  Employee workforce issues, including but not limited to labor disputes, the inability to attract and retain key talent, and future wage and employee benefit costs, including costs resulting from changes in discount rates and returns on benefit plan assets.

Management’s Discussion and Analysis of Financial Condition and Results of Operations should be read in conjunction with the Company’s Condensed Consolidated Financial Statements, Spire Missouri’s and Spire Alabama’s Condensed Financial Statements, and the notes thereto.

OVERVIEW

The Company has three reportable segments: Gas Utility, Gas Marketing, and Midstream. Spire’s earnings are derived primarily from its Gas Utility segment, which reflects the regulated activities of the Utilities. Due to the seasonal nature of the Utilities’ business and the volumetric Spire Missouri rate design, earnings of Spire and each of the Utilities are typically concentrated during the heating season of November through April each fiscal year.

Gas Utility – Spire Missouri

Spire Missouri is Missouri’s largest natural gas distribution utility and is regulated by the MoPSC. Spire Missouri serves St. Louis, Kansas City, and other areas throughout the state. Spire Missouri purchases natural gas in the wholesale market from producers and marketers and ships the gas through interstate pipelines into its own distribution facilities for sale to residential, commercial and industrial customers. Spire Missouri also transports gas through its distribution system for certain larger customers who buy their own gas on the wholesale market. Spire Missouri delivers natural gas to customers at rates and in accordance with tariffs authorized by the MoPSC. The earnings of Spire Missouri are primarily generated by the sale of heating energy.

Gas Utility – Spire Alabama

Spire Alabama is the largest natural gas distribution utility in the state of Alabama and is regulated by the APSC. Spire Alabama’s service territory is located in central and northern Alabama. Among the cities served by Spire Alabama are Birmingham, the center of the largest metropolitan area in the state, and Montgomery, the state capital. Spire Alabama purchases natural gas through interstate and intrastate suppliers and distributes the purchased gas through its distribution facilities for sale to residential, commercial, and industrial customers, and other end users of natural gas. Spire Alabama also transports gas through its distribution system for certain large commercial and industrial customers for a transportation fee. Effective December 1, 2020, for most of these transportation service customers, Spire Alabama also purchases gas on the wholesale market for sale to the customer upon delivery to the Spire Alabama distribution system. All Spire Alabama services are provided to customers at rates and in accordance with tariffs authorized by the APSC.

Gas Utility – Spire EnergySouth

Spire Gulf and Spire Mississippi are utilities engaged in the purchase, retail distribution and sale of natural gas to approximately 100,000 customers in southern Alabama and south-central Mississippi. Spire Gulf is regulated by the APSC, and Spire Mississippi is regulated by the MSPSC.

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Gas Marketing

Spire Marketing is engaged in the marketing of natural gas and related activities on a non-regulated basis and is reported in the Gas Marketing segment. Spire Marketing markets natural gas to customers across the U.S. (and into Canada), including customers inside and outside of the Utilities’ service areas. It holds firm transportation and storage contracts in order to effectively manage its transactions with counterparties, which primarily include producers, municipalities, electric and gas utility companies, and large commercial and industrial customers.

Midstream

Spire’s midstream operations consist of Spire Storage West LLC, Spire Storage Salt Plains LLC (jointly, “Spire Storage”), Spire STL Pipeline LLC (“Spire STL Pipeline”), Spire MoGas Pipeline. Spire STL Pipeline owns and operates a FERC-regulated 65-mile pipeline connecting the Rockies Express Pipeline in Scott County, Illinois, to delivery points in St. Louis County, Missouri, including Spire Missouri’s storage facility, and its operating revenue is derived primarily from Spire Missouri as its foundation shipper. Spire MoGas Pipeline (or simply “MoGas”), a 263-mile FERC-regulated natural gas pipeline and a connected 75-mile gas distribution system in Missouri, was acquired by Spire Midstream LLC, a subsidiary of Spire, on January 19, 2024. Spire Storage is engaged in the storage of natural gas in both the western and midcontinent regions of the United States. Spire Storage West, located in Wyoming, consists of two storage fields operating under one FERC market-based rate tariff, while Spire Storage Salt Plains, acquired on April 1, 2023 and located in Oklahoma, operates under intrastate jurisdiction with authorizations from FERC under Section 311 of the Natural Gas Policy Act to provide certain interstate storage, transportation, and hub services.

Other

Other components of the Company’s consolidated information include Spire’s subsidiaries engaged in the operation of a propane pipeline and risk management, among other activities, and unallocated corporate items, including certain debt and associated interest costs.

NON-GAAP MEASURES

Net income, earnings per share and operating income reported by Spire, Spire Missouri and Spire Alabama are determined in accordance with accounting principles generally accepted in the United States of America (GAAP). Spire, Spire Missouri and Spire Alabama also provide the non-GAAP financial measures of net economic earnings, net economic earnings per share and contribution margin. Management and the Board of Directors use non-GAAP financial measures, in addition to GAAP financial measures, to understand and compare operating results across accounting periods, for financial and operational decision making, for planning and forecasting, to determine incentive compensation and to evaluate financial performance. These non-GAAP operating metrics should not be considered as alternatives to, or more meaningful than, the related GAAP measures. Reconciliations of non-GAAP financial measures to the most directly comparable GAAP measures are provided on the following pages.

Net Economic Earnings and Net Economic Earnings Per Share

Net economic earnings and net economic earnings per share are non-GAAP measures that exclude from net income, as applicable, the impacts of fair value accounting and timing adjustments associated with energy-related transactions, the impacts of acquisition, divestiture and restructuring activities, the largely non-cash impacts of impairments, and other non-recurring or unusual items such as certain regulatory, legislative or GAAP standard-setting actions. In addition, net economic earnings per share would exclude the impact, in the fiscal year of issuance, of any shares issued to finance such activities that have yet to be included in net economic earnings.

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The fair value and timing adjustments are made in instances where the accounting treatment differs from what management considers the economic substance of the underlying transaction, including the following:

•  Net unrealized gains and losses on energy-related derivatives that are required by GAAP fair value accounting associated with current changes in the fair value of financial and physical transactions prior to their completion and settlement. These unrealized gains and losses result primarily from two sources:

1) changes in the fair values of physical and/or financial derivatives prior to the period of settlement; and

2) ineffective portions of accounting hedges, required to be recorded in earnings prior to settlement, due to differences in commodity price changes between the locations of the forecasted physical purchase or sale transactions and the locations of the underlying hedge instruments;

•  Lower of cost or market adjustments to the carrying value of commodity inventories resulting when the net realizable value of the commodity falls below its original cost, to the extent that those commodities are economically hedged; and

•  Realized gains and losses resulting from the settlement of economic hedges prior to the sale of the physical commodity.

These adjustments eliminate the impact of timing differences and the impact of current changes in the fair value of financial and physical transactions prior to their completion and settlement. Unrealized gains or losses are recorded in each period until being replaced with the actual gains or losses realized when the associated physical transactions occur. Management believes that excluding the earnings volatility caused by recognizing changes in fair value prior to settlement and other timing differences associated with related purchase and sale transactions provides a useful representation of the economic effects of only the actual settled transactions and their effects on results of operations. While management uses these non-GAAP measures to evaluate all of its businesses, the net effect of these fair value and timing adjustments on the Utilities’ earnings is minimal because gains or losses on their natural gas derivative instruments are deferred pursuant to state regulation.

Contribution Margin

In addition to operating revenues and operating expenses, management also uses the non-GAAP measure of contribution margin when evaluating results of operations. Contribution margin is defined as operating revenues less natural gas costs and gross receipts tax expense. The Utilities pass to their customers (subject to prudence review by, as applicable, the MoPSC, APSC or MSPSC) increases and decreases in the wholesale cost of natural gas in accordance with their PGA clauses or GSA riders. The volatility of the wholesale natural gas market results in fluctuations from period to period in the recorded levels of, among other items, revenues and natural gas cost expense. Nevertheless, increases and decreases in the cost of gas associated with system gas sales volumes and gross receipts tax expense (which are calculated as a percentage of revenues), with the same amount (excluding immaterial timing differences) included in revenues, have no direct effect on operating income. Therefore, management believes that contribution margin is a useful supplemental measure, along with the remaining operating expenses, for assessing the Company’s and the Utilities’ performance.

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EARNINGS – THREE MONTHS ENDED March 31, 2024

This section contains discussion and analysis of the results for the three months ended March 31, 2024 compared to the results for the three months ended March 31, 2023, in total and by registrant and segment. 

Spire

Net Income and Net Economic Earnings

The following tables reconcile the Company’s net economic earnings to the most comparable GAAP number, net income.

	Gas Utility			Gas Marketing			Midstream		Other			Total			Per Diluted Common Share**
Three Months Ended March 31, 2024
Net Income (Loss) [GAAP]	$	188.3		$	22.9		$	3.8	$	(10.7	)	$	204.3		$	3.58
Adjustments, pre-tax:
Fair value and timing adjustments		(0.4	)		(9.8	)		—		—			(10.2	)		(0.17	)
Income tax adjustments*		0.1			2.4			—		—			2.5			0.04
Net Economic Earnings (Loss) [Non-GAAP]	$	188.0		$	15.5		$	3.8	$	(10.7	)	$	196.6		$	3.45
Three Months Ended March 31, 2023
Net Income (Loss) [GAAP]	$	183.5		$	2.2		$	4.2	$	(10.7	)	$	179.2		$	3.33
Adjustments, pre-tax:
Fair value and timing adjustments		0.5			26.1			—		—			26.6			0.50
Income tax adjustments*		(0.1	)		(6.5	)		—		—			(6.6	)		(0.13	)
Net Economic Earnings (Loss) [Non-GAAP]	$	183.9		$	21.8		$	4.2	$	(10.7	)	$	199.2		$	3.70

*      Income tax adjustments include amounts calculated by applying federal, state, and local income tax rates applicable to ordinary income to the amounts of the pre-tax reconciling items.

**    Net economic earnings per share is calculated by replacing consolidated net income with consolidated net economic earnings in the GAAP diluted earnings per share calculation, which includes reductions for cumulative preferred dividends and participating shares.

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Reconciliations of contribution margin to the most directly comparable GAAP measure are shown below.

	Gas Utility			Gas Marketing			Midstream		Other			Eliminations			Consolidated
Three Months Ended March 31, 2024
Operating Income (Loss) [GAAP]	$	261.8		$	30.0		$	7.4	$	(0.6	)	$	—		$	298.6
Operation and maintenance expenses		121.6			6.2			9.4		4.7			(4.1	)		137.8
Depreciation and amortization		65.4			0.4			3.0		0.1			—			68.9
Taxes, other than income taxes		80.7			0.5			1.1		(0.1	)		0.2			82.4
Less: Gross receipts tax expense		(59.9	)		(0.1	)		—		—			—			(60.0	)
Contribution Margin [Non-GAAP]		469.6			37.0			20.9		4.1			(3.9	)		527.7
Natural gas costs		543.2			8.9			0.6		—			(11.9	)		540.8
Gross receipts tax expense		59.9			0.1			—		—			—			60.0
Operating Revenues	$	1,072.7		$	46.0		$	21.5	$	4.1		$	(15.8	)	$	1,128.5
Three Months Ended March 31, 2023
Operating Income (Loss) [GAAP]	$	251.3		$	2.4		$	7.5	$	(0.9	)	$	—		$	260.3
Operation and maintenance expenses		119.3			5.7			6.2		4.9			(4.0	)		132.1
Depreciation and amortization		60.2			0.4			2.0		—			—			62.6
Taxes, other than income taxes		80.4			0.6			0.8		0.1			—			81.9
Less: Gross receipts tax expense		(60.0	)		(0.2	)		—		—			—			(60.2	)
Contribution Margin [Non-GAAP]		451.2			8.9			16.5		4.1			(4.0	)		476.7
Natural gas costs		543.3			51.5			—		—			(8.3	)		586.5
Gross receipts tax expense		60.0			0.2			—		—			—			60.2
Operating Revenues	$	1,054.5		$	60.6		$	16.5	$	4.1		$	(12.3	)	$	1,123.4

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Select variances for the quarter ended March 31, 2024 compared to the quarter ended March 31, 2023 are summarized in the following table and discussed below.

	Gas		Gas						Other, Net of
Variances: Fiscal 2024 Versus Fiscal 2023	Utility		Marketing			Midstream			Eliminations			Consolidated
Net Income	$	4.8	$	20.7		$	(0.4	)	$	—		$	25.1
Net Economic Earnings [Non-GAAP]		4.1		(6.3	)		(0.4	)		—			(2.6	)
Operating Revenues		18.2		(14.6	)		5.0			(3.5	)		5.1
Contribution Margin [Non-GAAP]		18.4		28.1			4.4			0.1			51.0
Operation and Maintenance Expenses		2.3		0.5			3.2			(0.3	)		5.7
Interest Expense													5.0
Other Income													0.3
Income Tax													8.5

The increase in interest expense reflects the increase in interest rates on both short-term and long-term debt. Weighted-average short-term interest rates were 5.8% in the current-year quarter versus 5.0% in the prior-year quarter.

Other income increased $0.3 versus the prior-year quarter as favorable mark-to-market valuations on unqualified retirement and investment trusts more than offset declining inventory carrying cost credits at Spire Missouri.

The increase in income taxes reflects the increase in pre-tax book income and mix.

Gas Utility

For the quarter ended March 31, 2024, Gas Utility net income was $4.8 higher than the corresponding prior-year period, reflecting strong financial performance of the Southeast Utilities, which more than offset the $6.9 decrease at Spire Missouri. Net economic earnings in the current year were $4.1 higher than the prior year, which tracks the net income trend. These results are described in further detail below.

The increase in Gas Utility operating revenues was attributable to the following factors:

Spire Alabama – Per customer usage charge reset, combined with warm weather adjustment	$	38.6
Spire Missouri – Off-system sales and capacity release		7.8
Spire Alabama – RSE adjustments, net		6.4
Missouri Utilities – Infrastructure System Replacement Surcharge ("ISRS")		5.4
Spire Missouri and Spire Alabama – Lower PGA/GSA collections (gas cost recovery) due to volume		(33.0	)
Spire Missouri – Volumetric usage (net of weather mitigation)		(8.6	)
All other factors		1.6
Total Variation	$	18.2

The primary driver of the current year increase in revenue was the $38.6 incremental impact of the Spire Alabama customer charge reset, in combination with off-system sales growth at Spire Missouri, favorable RSE adjustments at Spire Alabama, and higher current year ISRS billings at Spire Missouri. These favorable impacts were partly offset by the impacts of weather in Spire Missouri’s territory. Lower weather-driven volumes in Spire Missouri reduced gas cost recoveries by $28.6 and customer usage by $8.6 in the current-year quarter. 

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The year-over-year increase in Gas Utility contribution margin was attributable to the following factors:

Spire Alabama – Per customer usage charge reset, combined with warm weather adjustment	$	10.3
Spire Alabama – RSE adjustments, net		6.4
Spire Missouri – ISRS		5.4
Spire EnergySouth		3.4
Spire Missouri – Volumetric usage (net of weather mitigation)		(8.6	)
All other factors		1.5
Total Variation	$	18.4

Contribution margin increased $18.4 versus the prior-year quarter. Contribution margin benefited from the $10.3 increase attributable to the implementation of the Spire Alabama customer charge reset, the $6.4 favorable RSE adjustment at Spire Alabama, and $5.4 Spire Missouri ISRS growth, combined with the $3.4 increase at Spire EnergySouth. These positive impacts more than offset the $8.6 negative volume usage impact (net of weather mitigation) experienced by Spire Missouri in the current-year quarter.

O&M expenses for the three months ended March 31, 2024, were $2.3 higher than the prior-year quarter. The Gas Utility segment O&M increase reflects higher employee and benefit costs in the current-year quarter. These unfavorable impacts were only partly offset by ongoing current-year efficiency initiatives that have lowered expense levels for non-payroll operations expense and reduced outside service costs.

Taxes, other than income taxes, increased $0.3, primarily due to higher property and real estate taxes. Depreciation and amortization expenses for the quarter ended March 31, 2024 were $5.2 higher than the same period in the prior year primarily driven by continued infrastructure capital expenditures across all the Utilities. Interest expense increased $2.8 to $38.3 primarily due to higher rates. The benefit of carrying cost credits decreased $1.5 quarter over quarter.

Gas Marketing

The $6.3 quarter-over-quarter decline in net economic earnings primarily reflects favorable market conditions in the prior year that did not recur this year. Current year market conditions reflect the abundance of natural gas supplies and warmer weather, which reduced commodity and basis volatility. Net income's inclusion of $27.0 (after-tax) favorable mark-to-market activity more than offset the decline in business conditions.

Revenues in the current quarter decreased $14.6. Contribution margin increased $28.1 versus the prior-year quarter, reflecting the $35.9 (pre-tax) favorable mark-to-market activity. Excluding this impact, contribution margin declined $7.8, reflecting the lower current-year asset optimization opportunities outlined above. O&M expenses were relatively stable versus the prior year, with a $0.5 quarter-over-quarter increase.

Midstream

Net income and net economic earnings for the Company’s Midstream segment for the quarter ended March 31, 2024 versus the prior-year quarter decreased $0.4. This reduction in net income and net economic earnings was driven by a decrease of $3.1 attributable to Spire Storage West, which benefited from more favorable market conditions in the prior year when it was able to optimize storage operations and commitments. This decrease was mostly offset by the incremental earnings related to the Spire Storage Salt Plains (April 2023) and Spire MoGas (January 2024) acquisitions.

Revenues in the current quarter increased $5.0 versus the prior-year quarter, and O&M expenses increased by $3.2 quarter-over-quarter, due primarily to timing of expenses and current-year quarter including the impacts of the Spire Storage Salt Plains and Spire MoGas acquisitions.

Other

The Company’s other activities generated a $10.7 loss in the three months ended March 31, 2024, in line with prior-year quarter results, as higher interest expense in the current year was offset by lower corporate costs.

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Spire Missouri

	Three Months Ended March 31,
	2024			2023
Operating Income [GAAP]	$	141.3		$	147.5
Operation and maintenance expenses		78.6			77.4
Depreciation and amortization		43.1			39.2
Taxes, other than income taxes		59.8			61.2
Less: Gross receipts tax expense		(44.0	)		(45.6	)
Contribution Margin [Non-GAAP]		278.8			279.7
Natural gas costs		443.7			465.7
Gross receipts tax expense		44.0			45.6
Operating Revenues	$	766.5		$	791.0
Net Income	$	105.2		$	112.1

Revenues for the quarter ended March 31, 2024 were $24.5 lower than the comparable prior-year period. Lower weather-driven volumes reduced gas cost recoveries by $28.6 and customer usage by $8.6 in the current-year quarter.  These negative impacts were only partly offset by an increase of $7.8 attributable to higher off-system sales and $5.4 incremental ISRS revenues in the current-year quarter. 

Contribution margin for the three months ended March 31, 2024 decreased $0.9 from the same period in the prior year, as ISRS billings and slightly higher margins on off-system sales and miscellaneous revenues were more than offset by the $8.6 usage decline primarily attributable to the warmer weather.

Degree days in Spire Missouri’s service areas during the three months ended March 31, 2024, were 15.2% warmer than normal, and 2.1% warmer than the same period last year. Spire Missouri’s total system volume sold and transported were 640.7 million centum (Latin for “hundred”) cubic feet (CCF) for the quarter, compared with 657.8 million CCF for the same period in the prior year. Total off-system volume sold and transported were 21.6 million CCF for the current-year quarter, compared with 1.2 million CCF a year ago.

O&M expenses for the current-year quarter increased $1.2 versus the prior-year quarter. The increase reflects higher employee and benefit costs in the current-year quarter. These unfavorable impacts were only partly offset by ongoing current-year efficiency initiatives that have lowered expense levels for non-payroll operations expense and reductions in outside service costs, combined with lower bad expense.

Depreciation and amortization expenses increased $3.9 versus the prior-year quarter due to ongoing capital investments. Taxes, other than income taxes, decreased $1.4, primarily driven by lower pass-through gross receipts taxes.

Other income declined by 0.2 versus the prior-year quarter, as favorable mark-to-market valuations on unqualified retirement trusts were more than offset by the decrease in inventory carrying cost credits of $1.5. Interest expense increased $3.1, primarily reflecting higher average short-term debt levels and higher short-term interest rates in the current year.

Resulting net income for the quarter ended March 31, 2024 decreased $6.9 versus the prior-year quarter.

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Spire Alabama

	Three Months Ended March 31,
	2024			2023
Operating Income [GAAP]	$	102.4		$	88.9
Operation and maintenance expenses		35.4			34.5
Depreciation and amortization		18.2			17.0
Taxes, other than income taxes		17.9			16.1
Less: Gross receipts tax expense		(14.1	)		(12.6	)
Contribution Margin [Non-GAAP]		159.8			143.9
Natural gas costs		85.6			61.8
Gross receipts tax expense		14.1			12.6
Operating Revenues	$	259.5		$	218.3
Net Income	$	70.7		$	60.0

Operating revenues for the three months ended March 31, 2024 increased $41.2 from the same period in the prior year. The increase in operating revenue was principally due to the $38.6 impact of the current year customer usage charge reset, combined with favorable RSE adjustments of $6.4. These favorable impacts were only partly offset by a $4.4 decrease in gas cost recovery.

Contribution margin was $15.9 higher versus the prior-year quarter, driven by the customer usage charge reset benefit of $10.3 and $6.4 favorable net rate adjustments under the RSE mechanism. This increase was slightly offset by a $0.9 decrease attributable to lower off-system sales.

As measured in degree days, temperatures in Spire Alabama’s service area during the three months ended March 31, 2024, were 9.5% warmer than normal, but 25.0% colder than a year ago. Spire Alabama’s total system volume sold and transported were 322.7 million CCF for the three months ended March 31, 2024, compared with 295.6 million CCF for the same period in the prior year. Total off-system volume sold and transported were 7.4 million CCF for the current-year quarter, compared with 13.4 million CCF off-system volume sold and transported in last year’s second quarter.

O&M expenses for the three months ended March 31, 2024 increased $0.9 versus the prior-year quarter as lower non-employee operating expenses and reductions of outside service costs were offset by higher benefit costs and higher bad debt expense.

Depreciation and amortization expenses were up $1.2, the result of continued investment in infrastructure upgrades. Interest expense for the current-year quarter decreased $0.7 versus the prior-year quarter, primarily the result of lower short-term borrowings more than offsetting higher short-term interest rates.

For the quarter ended March 31, 2024, resulting net income increased $10.7 versus the prior-year quarter.

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EARNINGS – six months ended March 31, 2024

This section contains discussion and analysis of the results for the six months ended March 31, 2024 compared to the results for the six months ended March 31, 2023, in total and by registrant and segment. 

Spire

Net Income and Net Economic Earnings

The following tables reconcile the Company’s net economic earnings to the most comparable GAAP number, net income.

	Gas Utility			Gas Marketing			Midstream			Other			Total			Per Diluted Common Share**
Six Months Ended March 31, 2024
Net Income (Loss) [GAAP]	$	263.8		$	34.3		$	4.7		$	(13.4	)	$	289.4		$	5.14
Adjustments, pre-tax:
Fair value and timing adjustments		—			(15.4	)		—			—			(15.4	)		(0.27	)
Acquisition activities		—			—			1.9			—			1.9			0.03
Income tax effect of adjustments*		—			3.8			(0.4	)		—			3.4			0.06
Net Economic Earnings (Loss) [Non-GAAP]	$	263.8		$	22.7		$	6.2		$	(13.4	)	$	279.3		$	4.96
Six Months Ended March 31, 2023
Net Income (Loss) [GAAP]	$	246.4		$	33.8		$	8.0		$	(18.0	)	$	270.2		$	4.99
Adjustments, pre-tax:
Fair value and timing adjustments		0.5			18.3			—			—			18.8			0.36
Income tax effect of adjustments*		(0.1	)		(4.6	)		—			—			(4.7	)		(0.09	)
Net Economic Earnings (Loss) [Non-GAAP]	$	246.8		$	47.5		$	8.0		$	(18.0	)	$	284.3		$	5.26

*      Income tax adjustments include amounts calculated by applying federal, state, and local income tax rates applicable to ordinary income to the amounts of the pre-tax reconciling items.

**    Net economic earnings per share is calculated by replacing consolidated net income with consolidated net economic earnings in the GAAP diluted earnings per share calculation, which includes reductions for cumulative preferred dividends and participating shares.

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Reconciliations of contribution margin to the most directly comparable GAAP measure are shown below.

	Gas Utility			Gas Marketing			Midstream		Other			Eliminations			Consolidated
Six Months Ended March 31, 2024
Operating Income (Loss) [GAAP]	$	384.1		$	44.7		$	10.7	$	(1.7	)	$	—		$	437.8
Operation and maintenance expenses		238.3			10.6			18.0		9.7			(8.1	)		268.5
Depreciation and amortization		129.6			0.8			5.3		0.2			—			135.9
Taxes, other than income taxes		132.3			0.8			1.8		—			0.2			135.1
Less: Gross receipts tax expense		(90.9	)		(0.2	)		—		—			—			(91.1	)
Contribution Margin [Non-GAAP]		793.4			56.7			35.8		8.2			(7.9	)		886.2
Natural gas costs		903.6			25.4			0.6		—			(21.8	)		907.8
Gross receipts tax expense		90.9			0.2			—		—			—			91.1
Operating Revenues	$	1,787.9		$	82.3		$	36.4	$	8.2		$	(29.7	)	$	1,885.1
Six Months Ended March 31, 2023
Operating Income (Loss) [GAAP]	$	353.2		$	43.8		$	14.6	$	(1.1	)	$	—		$	410.5
Operation and maintenance expenses		239.2			12.0			12.0		8.9			(7.9	)		264.2
Depreciation and amortization		119.9			0.7			3.9		0.2			—			124.7
Taxes, other than income taxes		130.3			0.7			1.2		0.1			—			132.3
Less: Gross receipts tax expense		(90.4	)		(0.2	)		—		—			—			(90.6	)
Contribution Margin [Non-GAAP]		752.2			57.0			31.7		8.1			(7.9	)		841.1
Natural gas costs		944.9			77.5			—		—			(16.7	)		1,005.7
Gross receipts tax expense		90.4			0.2			—		—			—			90.6
Operating Revenues	$	1,787.5		$	134.7		$	31.7	$	8.1		$	(24.6	)	$	1,937.4

Select variances for the  six months ended March 31, 2024 compared to the  six months ended March 31, 2023 are summarized in the following table and discussed below.

	Gas			Gas						Other, Net of
Variances: Fiscal 2024 Versus Fiscal 2023	Utility			Marketing			Midstream			Eliminations			Consolidated
Net Income	$	17.4		$	0.5		$	(3.3	)	$	4.6		$	19.2
Net Economic Earnings [Non-GAAP]		17.0			(24.8	)		(1.8	)		4.6			(5.0	)
Operating Revenues		0.4			(52.4	)		4.7			(5.0	)		(52.3	)
Contribution Margin [Non-GAAP]		41.2			(0.3	)		4.1			0.1			45.1
Operation and Maintenance Expenses		(0.9	)		(1.4	)		6.0			0.6			4.3
Interest Expense														12.0
Other Income														11.8
Income Tax														7.9

The increase in interest expense reflects higher average interest rates and higher average balances on long-term debt versus the prior year. Further, weighted-average short-term interest rates were 5.8% in the current-year period versus 4.7% in the prior-year period.  

Other income increased $11.8. Of this increase, $8.2 was the result of a gain realized on an interest rate swap contract after management determined the anticipated issuance of certain debt was no longer probable of occurring, resulting in the discontinuation of hedge accounting. The remaining variance was primarily attributable to inventory carrying cost credits at Spire Missouri, combined with favorable mark-to-market valuations on unqualified retirement and investment trusts.

The change in income taxes is materially consistent with the change in pre-tax book income combined with a slight increase in the effective tax rate, as certain benefits in the prior year did not recur.

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Gas Utility

For the six months ended March 31, 2024, Gas Utility net income was $17.4 higher than the prior-year period, primarily reflecting stronger financial performance across the Southeast utilities, and to a lesser extent, growth at Spire Missouri. Net economic earnings in the current year was $17.0 higher than the prior year, which tracks the net income trend. These results are described in further detail below.

The $0.4 increase in Gas Utility operating revenues was attributable to the following factors:

Spire Missouri and Spire Alabama – Lower PGA/GSA collections (gas cost recovery) due to volume	$	(53.5	)
Spire Missouri – Volumetric usage (net of weather mitigation)		(13.6	)
Spire Missouri – 2022 rate case outcomes		22.9
Spire Alabama – Per customer usage charge reset, combined with warm weather adjustment		21.8
Spire Alabama – RSE adjustments, net		10.4
Spire Missouri – Off-system sales and capacity release		6.9
Spire Missouri – Infrastructure System Replacement Surcharge ("ISRS")		5.6
All other factors		(0.1	)
Total Variation	$	0.4

The current year is benefiting from a $22.9 increase from Spire Missouri reflecting the final quarterly impact of implementing the 2022 rate order, $21.8 incremental revenues resulting from the reset of the Spire Alabama per customer usage charge (net of weather adjustment), favorable Spire Alabama RSE adjustments totaling $10.4, and increases in off-system sales and ISRS of $6.9 and $5.6, respectively, at Spire Missouri. These benefits were mostly offset due to weather impacts. Warmer weather across our utility footprint in the current year negatively impacted both gas cost recoveries and customer usage, particularly for Spire Missouri. Spire Missouri realized $51.8 lower gas cost recoveries in the current year, as the current year lower volumes more than offset the higher PGA rates being charged to customers. Spire Missouri also experienced lower volumetric usage totaling $13.6 in the current-year quarter. 

The year-over-year increase in Gas Utility contribution margin was attributable to the following factors:

Spire Missouri – 2022 rate case outcomes	$	22.9
Spire Alabama – RSE adjustments, net		10.3
Spire Alabama – Per customer usage charge reset, combined with warm weather adjustment		9.8
Spire Missouri – Infrastructure System Replacement Surcharge ("ISRS")		5.6
Spire Missouri – Volumetric usage (net of weather mitigation)		(13.6	)
All other factors		6.2
Total Variation	$	41.2

Contribution margin increased $41.2 versus the prior year. The $22.9 increase attributable to the implementation of the 2022 Missouri rate case order, $10.3 favorable RSE adjustment at Spire Alabama, $9.8 growth resulting from the reset of the Spire Alabama per customer usage charge (net of weather adjustment) and $5.6 increase in ISRS combined to more than offset the $13.6 negative volume usage impact (net of weather mitigation) experienced by Spire Missouri in the current year.

O&M expenses for the six months ended March 31, 2024 were $0.9 lower than the prior year. The Gas Utility segment O&M decrease reflects lower operations expense, and reductions in outside service costs. These favorable benefits were only partly offset by higher employee-related costs.

Taxes, other than income taxes, increased $2.0, primarily due to higher property and real estate taxes. Depreciation and amortization expenses for the six months ended March 31, 2024 were $9.7 higher than the same period in the prior year primarily driven by continued infrastructure capital expenditures across all the Utilities. Interest expense increased $9.7 to $77.3 reflecting higher average net debt levels and slightly higher short-term interest rates. Other income increased $2.3 in the current year, primarily the result of favorable mark-to-market valuations on unqualified retirement trusts.

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Gas Marketing

The $24.8 year-over-year decline in net economic earnings primarily reflects very favorable market conditions in the prior year that did not recur this year. Net income's inclusion of $25.3 (after-tax) favorable mark-to-market activity more than offset the decline in business conditions.

Revenues in the current year decreased $52.4 and contribution margin decreased $34.0 (after removing the $33.7 pre-tax favorable mark-to-market activity) versus the prior-year period, reflecting the lower current-year asset optimization opportunities outlined above. Operating expenses decreased by $1.4 year-over-year, due primarily lower employee-related costs.

Midstream

Net income and net economic earnings for the Company’s Midstream segment for the six months ended March 31, 2024 versus the prior-year period decreased $3.3 and $1.8, respectively. The benefits of the Spire Storage Salt Plains and MoGas acquisitions were more than offset by the $4.0 reduction in net income and net economic earnings at Spire Storage West, which benefited from more favorable market conditions in the prior year when it was able to optimize storage operations and commitments. Net income was also impacted by $1.5 (after-tax) in acquisition transaction expenses incurred in the current year relating to the acquisition of MoGas.

Revenues in the current year increased $4.7 versus the prior-year period, due primarily to the acquisitions of Spire Storage Salt Plains and MoGas offsetting lower Spire Storage West revenues attributable primarily to the previously mentioned more favorable market conditions in the prior year. O&M expenses increased by $6.0 year-over-year, due primarily to operating expenses associated with the before-mentioned acquisitions, combined with transaction costs related to MoGas.

Other

The Company’s other activities generated a $13.4 loss in the six months ended March 31, 2024, $4.6 lower than the prior-year period. The improved results were driven by the current-year $8.2 gain realized on an interest rate swap contract after management determined the anticipated issuance of certain debt was no longer probable of occurring, resulting in the discontinuation of hedge accounting. This gain more than offset higher interest expense and slightly higher corporate costs in the current year.

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Spire Missouri

	Six Months Ended March 31,
	2024			2023
Operating Income [GAAP]	$	228.6		$	219.9
Operation and maintenance expenses		153.5			154.5
Depreciation and amortization		85.2			77.8
Taxes, other than income taxes		98.3			97.6
Less: Gross receipts tax expense		(66.5	)		(67.7	)
Contribution Margin [Non-GAAP]		499.1			482.1
Natural gas costs		736.3			782.4
Gross receipts tax expense		66.5			67.7
Operating Revenues	$	1,301.9		$	1,332.2
Net Income	$	162.2		$	159.4

Revenues for the six months ended March 31, 2024 were $30.3 lower than the comparable prior-year period. A key driver was a decrease in gas recovery (PGA) totaling $51.8. Higher rates in the current year were more than offset by lower volumetric usage. This lower volume usage decreased revenues versus the prior year by $13.6. These negative impacts were only partly offset by an increase of $22.9 attributable to the impact of the 2022 rate order (new rates became effective the last week of December 2022) and higher off-system sales and ISRS of $6.9 and $5.6, respectively. 

Contribution margin for the six months ended March 31, 2024 increased $17.0 from the same period in the prior year. The previously mentioned timing of the 2022 rate case implementation generated $22.9 incremental contribution combined with $5.6 higher ISRSA more than offset the $13.6 impact of lower volumes. 

Degree days in Spire Missouri’s service areas during the six months ended March 31, 2024, were 16.7% warmer than normal, and 9.2% warmer than the same period last year. Spire Missouri’s total system volume sold and transported were 1,090.4 million CCF for the current-year period, compared with 1,215.9 million CCF for the prior-year period. Total off-system volume sold and transported were 23.8 million CCF for the current-year, compared with 3.9 million CCF a year ago.

Reported O&M expenses for the current-year quarter decreased $1.0 versus the prior year. The reduction of current year O&M was driven by non-payroll operations expense, lower outside services costs, and lower bad debt expense. These lower expenditure levels in the current year were only partly offset by higher employee related expenses and higher benefit claims expense.

Depreciation and amortization expenses increased $7.4 versus the prior-year period due to ongoing capital investments. Taxes, other than income taxes, increased $0.7, as higher property taxes in the current year were mostly offset by lower pass-through gross receipts taxes.

Other income improved by $2.0. This variance is primarily attributable to favorable mark-to-market valuations on unqualified retirement trusts. Interest expense increased $9.0, reflecting higher short-term interest rates in the current year and the $400 in long-term debt that was issued in the prior-year second quarter.

Resulting net income for the six months ended March 31, 2024 increased $2.8 versus the prior-year comparable period.

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Spire Alabama

	Six Months Ended March 31,
	2024			2023
Operating Income [GAAP]	$	126.4		$	109.2
Operation and maintenance expenses		69.6			69.6
Depreciation and amortization		36.1			34.0
Taxes, other than income taxes		28.1			26.7
Less: Gross receipts tax expense		(21.0	)		(19.4	)
Contribution Margin [Non-GAAP]		239.2			220.1
Natural gas costs		141.4			131.2
Gross receipts tax expense		21.0			19.4
Operating Revenues	$	401.6		$	370.7
Net Income	$	81.8		$	69.2

Operating revenues for the six months ended March 31, 2024 increased $30.9 from the same period in the prior year. The increase in operating revenue was principally due to the $21.8 impact of the current year customer usage charge reset net of weather adjustments, combined with favorable RSE adjustments of $10.4. These favorable impacts were only partly offset by a $1.7 decrease in gas cost recovery.

Contribution margin was $19.1 higher versus the prior-year comparable period, primarily driven by $10.3 favorable net rate adjustments under the RSE mechanism and $9.8 relating to the customer usage charge reset (net of weather adjustments). This increase was slightly offset by a $0.8 decrease attributable to lower off-system sales.

As measured in degree days, temperatures in Spire Alabama’s service area during the six months ended March 31, 2024, were 10.6% warmer than normal, but 15.3% colder than a year ago. Spire Alabama’s total system volume sold and transported were 552.0 million CCF for the six months ended March 31, 2024, compared with 547.7 million CCF for the same period in the prior year. Total off-system volume sold and transported were 33.9 million CCF for the current year, compared with 28.0 million CCF off-system volume sold and transported in last year’s comparable period.

O&M expenses for the six months ended March 31, 2024 were flat versus the comparable prior-year period, as lower employee-related costs and lower non-employee operating expenses, were offset by higher insurance and bad debt expense.

Depreciation and amortization expenses were up $2.1, the result of continued investment in infrastructure upgrades. Interest expense for the current-year period increased $0.3 versus the prior-year period, primarily the result of higher short-term interest rates.

For the six months ended March 31, 2024, resulting net income increased $12.6 versus the prior-year period.

LIQUIDITY AND CAPITAL RESOURCES

Recent Cash Flows

	Six Months Ended March 31,
Cash Flow Summary	2024			2023
Net cash provided by operating activities	$	559.4		$	179.9
Net cash used in investing activities		(583.9	)		(340.7	)
Net cash provided by financing activities		45.1			161.5

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For the six months ended March 31, 2024, net cash from operating activities improved $379.5 from the corresponding period of fiscal 2023. The key drivers of the favorable change are regulatory timing and fluctuations in working capital items, as discussed below in the Future Cash Requirements section, particularly the prior-year decreases in accounts payable and inventories and the current-year decrease in net regulatory assets.

For the six months ended March 31, 2024, net cash used in investing activities was $243.2 greater than for the same period in the prior year. Payments for business acquisitions (net of cash acquired) were $177.4 for MoGas this year and $37.1 for Spire Storage Salt Plains last year. Total capital expenditures were $101.5 higher than last year, with a $22.2 spending increase in the Utilities and an $81.0 increase for Midstream (Spire Storage West expansion).

Lastly, for the six months ended March 31, 2024, net cash provided by financing activities decreased $116.4 versus the six months ended March 31, 2023. In the first half of fiscal 2024, there was a $151.1 reduction of debt, while debt increased $247.3 in the first half of fiscal 2023. The relative cash outflow of those changes was only partially offset by the increase in stock issuance this year. Cash from the issuance of common stock in the current-year period included the $112.2 settlement of forward sales under its ATM program and the $175 settlement of equity units, described in Note 4 of the Notes to Financial Statements in Item 1.

Future Cash Requirements

The Company’s short-term borrowing requirements typically peak during colder months when the Utilities borrow money to cover the lag between when they purchase natural gas and when their customers pay for that gas. Changes in the wholesale cost of natural gas (including cash payments for margin deposits associated with Spire Missouri’s use of natural gas derivative instruments), variations in the timing of collections of gas cost under the Utilities’ PGA clauses and GSA riders, the seasonality of accounts receivable balances, and the utilization of stored gas inventories cause short-term cash requirements to vary during the year and from year to year, and may cause significant variations in the Company’s cash provided by or used in operating activities.

Spire’s material cash requirements as of March 31, 2024, are related to capital expenditures, principal and interest payments on long-term debt, natural gas purchase obligations, and dividends. There were no material changes outside the ordinary course of business from the future cash requirements discussed in the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2023. Total Company capital expenditures are planned to be $800 for fiscal 2024.

Source of Funds

It is management’s view that the Company, Spire Missouri and Spire Alabama have adequate access to capital markets and will have sufficient capital resources, both internal and external, to meet anticipated requirements. Their debt is rated by two rating agencies: Standard & Poor’s Corporation (“S&P”) and Moody’s Investors Service (“Moody’s”). As of March 31, 2024, the debt ratings of the Company, Spire Missouri and Spire Alabama (shown in the following table) remain at investment grade, with a negative outlook (other than Moody’s stable outlook for Spire Inc. and Spire Missouri).

	S&P	Moody’s
Spire Inc. senior unsecured long-term debt	BBB+	Baa2
Spire Inc. preferred stock	BBB	Ba1
Spire Inc. short-term debt	A-2	P-2
Spire Missouri senior secured long-term debt	A	A1
Spire Alabama senior unsecured long-term debt	A-	A2

Cash and Cash Equivalents

Bank deposits were used to support working capital needs of the business. Spire had no temporary cash investments as of March 31, 2024.

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Short-term Debt

The Company’s short-term cash requirements can be met through the sale of up to $1,300.0 of commercial paper or through the use of Spire’s $1,300.0 revolving credit facility. For information about short-term borrowings, see Note 6, Financing, of the Notes to Financial Statements in Item 1.

Long-term Debt and Equity

At March 31, 2024, Spire had outstanding principal of long-term debt totaling $3,751.1, of which $1,798.0 was issued by Spire Missouri, $750.0 was issued by Spire Alabama, and $223.1 was issued by other subsidiaries. For information about long-term debt issued this fiscal year, see Note 6, Financing, of the Notes to Financial Statements in Item 1.

Effective March 5, 2022, Spire Missouri was authorized by the MoPSC to issue conventional term loans, first mortgage bonds, unsecured debt, preferred stock and common stock in an aggregate amount of up to $800.0 for financings placed any time before December 31, 2024. Under this authorization through December 2023, Spire Missouri has issued $79.1 of common stock and $400.0 of first mortgage bonds. Spire Alabama has no standing authority to issue long-term debt and must petition the APSC for each planned issuance.

Spire has a shelf registration statement on Form S-3 on file with the U.S. Securities and Exchange Commission (SEC) for the issuance and sale of up to 250,000 shares of common stock under its Dividend Reinvestment and Direct Stock Purchase Plan. There were 230,971 and 225,054 shares at March 31, 2024 and April 28, 2024, respectively, remaining available for issuance under this Form S-3. Spire and Spire Missouri also have a universal shelf registration statement on Form S-3 on file with the SEC for the issuance of various equity and debt securities, which expires on May 9, 2025.

For more information about the issuance of common stock, including Spire's “at-the-market” (ATM) equity distribution agreement and the settlement of equity units, see Note 4, Shareholders’ Equity, of the Notes to Financial Statements in Item 1.

Including the current portion of long-term debt, the Company’s long-term consolidated capitalization consisted of 48% and 44% equity at March 31, 2024 and September 30, 2023, respectively.

ENVIRONMENTAL MATTERS

The Utilities and other Spire subsidiaries own and operate natural gas distribution, transmission and storage facilities, the operations of which are subject to various environmental laws, regulations, and interpretations. While environmental issues resulting from such operations arise in the ordinary course of business, such issues have not materially affected the Company’s, Spire Missouri’s, or Spire Alabama’s financial position and results of operations. As environmental laws, regulations, and interpretations change, however, the Company and the Utilities may be required to incur additional costs. For information relative to environmental matters, see Contingencies in Note 11 of the Notes to Financial Statements in Item 1.

REGULATORY MATTERS

For discussions of regulatory matters for Spire, Spire Missouri, and Spire Alabama, see Note 5, Regulatory Matters, of the Notes to Financial Statements in Item 1.

ACCOUNTING PRONOUNCEMENTS

The Company, Spire Missouri and Spire Alabama have evaluated or are in the process of evaluating the effects that recently issued accounting standards will have on the companies’ financial position or results of operations upon adoption, but none are currently expected to have a significant impact.

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CRITICAL ACCOUNTING ESTIMATES

Our discussion and analysis of our financial condition, results of operations, liquidity and capital resources are based upon our financial statements, which have been prepared in accordance with GAAP, which requires that we make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. We evaluate our estimates on an ongoing basis. We base our estimates on historical experience and on various other assumptions that we believe are reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates. Our critical accounting estimates used in the preparation of our financial statements are described in Item 7 of Spire, Spire Missouri, and Spire Alabama’s combined Annual Report on Form 10-K for the fiscal year ended September 30, 2023, and include regulatory accounting, employee benefits and postretirement obligations, impairment of long-lived assets, and income taxes. There were no significant changes to critical accounting estimates during the six months ended March 31, 2024.

For discussion of other significant accounting policies, see Note 1 of the Notes to Financial Statements included in this Form 10-Q as well as Note 1 of the Notes to Financial Statements included in Spire, Spire Missouri, and Spire Alabama’s combined Annual Report on Form 10-K for the fiscal year ended September 30, 2023.

MARKET RISK

There were no material changes in the Company’s commodity price risk or counterparty credit risk as of March 31, 2024, relative to the corresponding information provided in the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2023.

Spire enters into cash flow hedges through execution of interest rate swap contracts to protect itself against adverse movements in interest rates. At March 31, 2024, the following swaps were outstanding:

Period Originated	Contract Hedge Term (Years)		Notional Amount		Fixed Interest Rate			Fiscal 2024 Mark-to-Market (Loss) Gain			Net Asset
Quarter 1, fiscal 2022		10	$	50.0		1.4918	%	$	(1.3	)	$	8.4
Quarter 2, fiscal 2022		10		75.0		1.6475	%		(1.9	)		11.7
Quarter 2, fiscal 2022		10		25.0		1.7460	%		(0.6	)		3.7
Quarter 1, fiscal 2023		10		50.0		3.4480	%		(1.6	)		0.9
Quarter 3, fiscal 2023		10		25.0		2.9020	%		(0.7	)		1.5
Quarter 3, fiscal 2023		10		25.0		3.0180	%		(0.8	)		1.2
Quarter 1, fiscal 2024		10		25.0		3.5250	%		0.3			0.3
Quarter 1, fiscal 2024		10		25.0		3.5350	%		0.3			0.3
Quarter 1, fiscal 2024		10		25.0		3.4500	%		0.5			0.5
Quarter 1, fiscal 2024		10		25.0		3.4000	%		0.5			0.5
			$	350.0				$	(5.3	)	$	29.0

As of March 31, 2024, the Company has recorded through accumulated other comprehensive income a cumulative mark-to-market net gain of $29.0 on open swap contracts.

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Item 3. Quantitative and Qualitative Disclosures About Market Risk

For this discussion, see Part I, Item 2, Management’s Discussion and Analysis of Financial Condition and Results of Operations – Market Risk.

Item 4. Controls and Procedures

Spire

Evaluation of Disclosure Controls and Procedures

As of the end of the period covered by this report, we carried out an evaluation, under the supervision and with participation of our management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures pursuant to Rule 13a-15(e) and Rule 15d-15(e) under the Securities Exchange Act of 1934, as amended. Based upon such evaluation, the Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures are effective.

Change in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting that occurred during the quarter ended March 31, 2024, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Spire Missouri

Evaluation of Disclosure Controls and Procedures

As of the end of the period covered by this report, we carried out an evaluation, under the supervision and with participation of our management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of our disclosure controls and procedures pursuant to Rule 13a-15(e) and Rule 15d-15(e) under the Securities Exchange Act of 1934, as amended. Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures are effective.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting that occurred during the quarter ended March 31, 2024, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Spire Alabama

Evaluation of Disclosure Controls and Procedures

As of the end of the period covered by this report, we carried out an evaluation, under the supervision and with participation of our management, including our Chief Executive Officer and Chief Financial Officer, of the effectiveness of the design and operation of the disclosure controls and procedures pursuant to Rule 13a-15(e) and Rule 15d-15(e) under the Securities Exchange Act of 1934, as amended. Based upon that evaluation, the Chief Executive Officer and Chief Financial Officer concluded that our disclosure controls and procedures are effective.

Changes in Internal Control over Financial Reporting

There were no changes in our internal control over financial reporting that occurred during the quarter ended March 31, 2024, that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

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PART II. OTHER INFORMATION

Item 1. Legal Proceedings

For a description of legal proceedings, environmental matters and regulatory matters, see Note 11, Commitments and Contingencies, and Note 5, Regulatory Matters, of the Notes to Financial Statements in Item 1 of Part I.

Item 1A. Risk Factors

There were no material changes in the Company’s risk factors from those disclosed in Part I, Item 1A of the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2023.

Item 2. Unregistered Sales of Equity Securities and Use of Proceeds

The only repurchases of Spire’s common stock in the quarter were pursuant to elections by employees to have shares of stock withheld to cover employee tax withholding obligations upon the vesting of performance-based and time-vested restricted stock and stock units. The following table provides information on those repurchases.

Period	(a) Total Number of Shares Purchased		(b) Average Price Paid Per Share		(c) Total Number of Shares Purchased as Part of Publicly Announced Plans or Programs		(d) Maximum Number of Shares That May Yet be Purchased Under the Plans or Programs
January 1, 2024 – January 31, 2024		897	$	63.68		—		—
February 1, 2024 – February 29, 2024		—		—		—		—
March 1, 2024 – March 31, 2024		85		59.61		—		—
Total		982		63.33		—		—

Spire Missouri’s outstanding first mortgage bonds contain restrictions on its ability to pay cash dividends on its common stock. As of March 31, 2024, all of Spire Missouri’s retained earnings were free from such restrictions.

Item 3. Defaults upon Senior Securities

None.

Item 4. Mine Safety Disclosures

Not applicable.

Item 5. Other Information

During the quarterly period ended March 31, 2024, no director or officer of the Company adopted or terminated any contract, instruction or written plan for the purchase or sale of securities of the Company intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) of the Exchange Act or any “non-Rule 10b5-1 trading arrangement” (as defined in the Exchange Act).

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Item 6. Exhibits

Exhibit No.	Description
4.1*	Third Supplemental Indenture, dated as of February 12, 2024, between Spire Inc. and Regions Bank, as successor Trustee to UMB Bank & Trust, N.A.; filed as Exhibit 4.2 to Spire Inc.’s Current Report on Form 8-K on February 12, 2024.
4.2*	Form of 5.300% Senior Notes due 2026 (included in Exhibit 4.1).
4.3*	Securities Purchase and Registration Rights Agreement, dated February 5, 2024, among Spire Inc. and the several purchasers named in Schedule A thereto; filed as Exhibit 1.1 to Spire Inc.’s Current Report on Form 8-K on February 9, 2024.
10.1*	Loan Agreement, dated January 3, 2024, among Spire Missouri Inc., U.S. Bank National Association, as the administrative agent, and the lenders party thereto; filed as Exhibit 10.1 to Spire Inc. and Spire Missouri Inc.’s Current Report on Form 8-K on January 3, 2024.
10.2*	Third Letter Agreement to the Equity Distribution Agreement of the Company, dated as of February 6, 2024, filed as Exhibit 1.1 to Spire Inc.’s Current Report on Form 8-K on February 6, 2024.
31.1	CEO and CFO Certifications under Exchange Act Rule 13a-14(a) of Spire Inc.
31.2	CEO and CFO Certifications under Exchange Act Rule 13a-14(a) of Spire Missouri Inc.
31.3	CEO and CFO Certifications under Exchange Act Rule 13a-14(a) of Spire Alabama Inc.
32.1	CEO and CFO Section 1350 Certifications of Spire Inc.
32.2	CEO and CFO Section 1350 Certifications of Spire Missouri Inc.
32.3	CEO and CFO Section 1350 Certifications of Spire Alabama Inc.
101	Interactive Data Files including the following information from the Quarterly Report on Form 10-Q for the period ended March 31, 2024, formatted in inline extensible business reporting language (“Inline XBRL”): (i) Cover Page Interactive Data and (ii) the Financial Statements included in Item 1.
104	Cover Page Interactive Data File (formatted in Inline XBRL and included in the Interactive Data Files submitted under Exhibit 101).

* Incorporated herein by reference and made a part hereof. Spire Inc. file No. 1-16681. Spire Missouri Inc. File No. 1-1822.

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, each of the registrants has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

		Spire Inc.
Date:	May 1, 2024	By:	/s/ Steven P. Rasche
			Steven P. Rasche
			Executive Vice President and Chief Financial Officer
			(Authorized Signatory and Principal Financial Officer)

		Spire Missouri Inc.
Date:	May 1, 2024	By:	/s/ Timothy W. Krick
			Timothy W. Krick
			Controller and Chief Accounting Officer
			(Authorized Signatory and Chief Accounting Officer)

		Spire Alabama Inc.
Date:	May 1, 2024	By:	/s/ Timothy W. Krick
			Timothy W. Krick
			Chief Accounting Officer
			(Authorized Signatory and Chief Accounting Officer)

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EX-31.1

Exhibit 31.1

CERTIFICATION

I, Steven L. Lindsey, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Spire Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	May 1, 2024	Signature:	/s/ Steven L. Lindsey
			Steven L. Lindsey
			President and Chief Executive Officer

CERTIFICATION

I, Steven P. Rasche, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Spire Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	May 1, 2024	Signature:	/s/ Steven P. Rasche
			Steven P. Rasche
			Executive Vice President and Chief Financial Officer

EX-31.2

Exhibit 31.2

CERTIFICATION

I, Steven L. Lindsey, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Spire Missouri Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	May 1, 2024	Signature:	/s/ Steven L. Lindsey
			Steven L. Lindsey
			Chief Executive Officer

CERTIFICATION

I, Adam W. Woodard, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Spire Missouri Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	May 1, 2024	Signature:	/s/ Adam W. Woodard
			Adam W. Woodard
			Chief Financial Officer

EX-31.3

Exhibit 31.3

CERTIFICATION

I, Steven L. Lindsey, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Spire Alabama Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	May 1, 2024	Signature:	/s/ Steven L. Lindsey
			Steven L. Lindsey
			Chief Executive Officer

CERTIFICATION

I, Adam W. Woodard, certify that:

1. I have reviewed this quarterly report on Form 10-Q of Spire Alabama Inc.;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:	May 1, 2024	Signature:	/s/ Adam W. Woodard
			Adam W. Woodard
			Chief Financial Officer

EX-32.1

Exhibit 32.1

Section 1350 Certification

Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, I, Steven L. Lindsey, President and Chief Executive Officer of Spire Inc., hereby certify that:

(a) To the best of my knowledge, the accompanying report on Form 10-Q for the period ended March 31, 2024, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(b) To the best of my knowledge, the information contained in the accompanying report on Form 10-Q for the period ended March 31, 2024, fairly presents, in all material respects, the financial condition and results of operations of Spire Inc.

Date: May 1, 2024	Signature:	/s/ Steven L. Lindsey
		Steven L. Lindsey
		President and Chief Executive Officer

Section 1350 Certification

Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, I, Steven P. Rasche, Executive Vice President and Chief Financial Officer of Spire Inc., hereby certify that:

(a) To the best of my knowledge, the accompanying report on Form 10-Q for the period ended March 31, 2024, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(b) To the best of my knowledge, the information contained in the accompanying report on Form 10-Q for the period ended March 31, 2024, fairly presents, in all material respects, the financial condition and results of operations of Spire Inc.

Date: May 1, 2024	Signature:	/s/ Steven P. Rasche
		Steven P. Rasche
		Executive Vice President and Chief Financial Officer

EX-32.2

Exhibit 32.2

Section 1350 Certification

Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, I, Steven L. Lindsey, Chief Executive Officer of Spire Missouri Inc., hereby certify that:

(a) To the best of my knowledge, the accompanying report on Form 10-Q for the period ended March 31, 2024, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(b) To the best of my knowledge, the information contained in the accompanying report on Form 10-Q for the period ended March 31, 2024, fairly presents, in all material respects, the financial condition and results of operations of Spire Missouri Inc.

Date: May 1, 2024	Signature:	/s/ Steven L. Lindsey
		Steven L. Lindsey
		Chief Executive Officer

Section 1350 Certification

Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, I, Adam W. Woodard, Chief Financial Officer of Spire Missouri Inc., hereby certify that:

(a) To the best of my knowledge, the accompanying report on Form 10-Q for the period ended March 31, 2024, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(b) To the best of my knowledge, the information contained in the accompanying report on Form 10-Q for the period ended March 31, 2024, fairly presents, in all material respects, the financial condition and results of operations of Spire Missouri Inc.

Date: May 1, 2024	Signature:	/s/ Adam W. Woodard
		Adam W. Woodard
		Chief Financial Officer

EX-32.3

Exhibit 32.3

Section 1350 Certification

Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, I, Steven L. Lindsey, Chief Executive Officer of Spire Alabama Inc., hereby certify that:

(a) To the best of my knowledge, the accompanying report on Form 10-Q for the period ended March 31, 2024, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(b) To the best of my knowledge, the information contained in the accompanying report on Form 10-Q for the period ended March 31, 2024, fairly presents, in all material respects, the financial condition and results of operations of Spire Alabama Inc.

Date: May 1, 2024	Signature:	/s/ Steven L. Lindsey
		Steven L. Lindsey
		Chief Executive Officer

Section 1350 Certification

Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, I, Adam W. Woodard, Chief Financial Officer of Spire Alabama Inc., hereby certify that:

(a) To the best of my knowledge, the accompanying report on Form 10-Q for the period ended March 31, 2024, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(b) To the best of my knowledge, the information contained in the accompanying report on Form 10-Q for the period ended March 31, 2024, fairly presents, in all material respects, the financial condition and results of operations of Spire Alabama Inc.

Date: May 1, 2024	Signature:	/s/ Adam W. Woodard
		Adam W. Woodard
		Chief Financial Officer

XML

Document And Entity Information - shares	6 Months Ended
	Mar. 31, 2024	Apr. 28, 2024
Document Information [Line Items]
Entity Central Index Key	0001126956
Entity Registrant Name	Spire Inc.
Amendment Flag	false
Current Fiscal Year End Date	--09-30
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2024
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2024
Document Transition Report	false
Entity File Number	1-16681
Entity Address, Address Line One	700 Market Street
Entity Address, City or Town	St. Louis
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	63101
City Area Code	314
Local Phone Number	342-0500
Entity Incorporation, State or Country Code	MO
Entity Tax Identification Number	74-2976504
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		57,747,978
Spire Missouri [Member]
Document Information [Line Items]
Entity Central Index Key	0000057183
Entity Registrant Name	Spire Missouri Inc.
Amendment Flag	false
Current Fiscal Year End Date	--09-30
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2024
Entity File Number	1-1822
Entity Address, Address Line One	700 Market Street
Entity Address, City or Town	St. Louis
Entity Address, State or Province	MO
Entity Address, Postal Zip Code	63101
City Area Code	314
Local Phone Number	342-0500
Entity Incorporation, State or Country Code	MO
Entity Tax Identification Number	43-0368139
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		25,855
Spire Alabama Inc [Member]
Document Information [Line Items]
Entity Central Index Key	0000003146
Entity Registrant Name	Spire Alabama Inc.
Amendment Flag	false
Current Fiscal Year End Date	--09-30
Document Fiscal Period Focus	Q2
Document Fiscal Year Focus	2024
Entity File Number	2-38960
Entity Address, Address Line One	605 Richard Arrington Blvd N
Entity Address, City or Town	Birmingham
Entity Address, State or Province	AL
Entity Address, Postal Zip Code	35203
City Area Code	205
Local Phone Number	326-8100
Entity Incorporation, State or Country Code	AL
Entity Tax Identification Number	63-0022000
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		1,972,052
Depositary Shares [Member]
Document Information [Line Items]
Title of 12(b) Security	Depositary Shares
Trading Symbol	SR.PRA
Security Exchange Name	NYSE
Common Stock [Member]
Document Information [Line Items]
Title of 12(b) Security	Common Stock $1.00 par value
Trading Symbol	SR
Security Exchange Name	NYSE

XML

Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Operating Revenues	$ 1,128.5	$ 1,123.4	$ 1,885.1	$ 1,937.4
Operating Expenses:
Natural gas	540.8	586.5	907.8	1,005.7
Operation and maintenance	137.8	132.1	268.5	264.2
Depreciation and amortization	68.9	62.6	135.9	124.7
Taxes, other than income taxes	82.4	81.9	135.1	132.3
Total Operating Expenses	829.9	863.1	1,447.3	1,526.9
Operating Income	298.6	260.3	437.8	410.5
Interest Expense, Net	52.2	47.2	102.8	90.8
Other Income, Net	7.3	7.0	24.8	13.0
Income Before Income Taxes	253.7	220.1	359.8	332.7
Income Tax Expense	49.4	40.9	70.4	62.5
Net Income	204.3	179.2	289.4	270.2
Provision for preferred dividends	3.7	3.7	7.4	7.4
Income allocated to participating securities	0.3	0.4	0.4	0.5
Net Income Available to Common Shareholders	$ 200.3	$ 175.1	$ 281.6	$ 262.3
Weighted Average Number of Common Shares Outstanding:
Basic (in shares)	55.8	52.5	54.6	52.5
Diluted (in shares)	55.9	52.6	54.7	52.6
Basic Earnings Per Common Share (in dollars per share)	$ 3.59	$ 3.33	$ 5.16	$ 5
Diluted Earnings Per Common Share (in dollars per share)	$ 3.58	$ 3.33	$ 5.14	$ 4.99
Operating Revenues	$ 1,128.5	$ 1,123.4	$ 1,885.1	$ 1,937.4
Spire Alabama Inc [Member]
Operating Revenues	259.5	218.3	401.6	370.7
Operating Expenses:
Natural gas	85.6	61.8	141.4	131.2
Operation and maintenance	35.4	34.5	69.6	69.6
Depreciation and amortization	18.2	17.0	36.1	34.0
Taxes, other than income taxes	17.9	16.1	28.1	26.7
Total Operating Expenses	157.1	129.4	275.2	261.5
Operating Income	102.4	88.9	126.4	109.2
Interest Expense, Net	8.3	9.0	17.6	17.3
Other Income, Net	0.4	0.3	0.7	0.7
Income Before Income Taxes	94.5	80.2	109.5	92.6
Income Tax Expense	23.8	20.2	27.7	23.4
Net Income	70.7	60.0	81.8	69.2
Weighted Average Number of Common Shares Outstanding:
Operating Revenues	$ 259.5	$ 218.3	$ 401.6	$ 370.7

XML

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Mar. 31, 2024		Mar. 31, 2023		Mar. 31, 2024		Mar. 31, 2023
Net Income	$ 204.3		$ 179.2		$ 289.4		$ 270.2
Other Comprehensive Income (Loss), Before Tax:
Net hedging gain (loss) arising during the period	9.1		(6.8)		(6.3)		(9.8)
Amounts reclassified into regulatory liabilities	0.0		(17.5)		0.0		(17.5)
Amounts reclassified into net income	(0.6)		(0.5)		(9.6)		(0.8)
Net gain (loss) on cash flow hedging derivative instruments	8.5		(24.8)		(15.9)		(28.1)
Net gain on defined benefit pension and other postretirement plans	0.0		0.1		0.1		0.2
Net unrealized gain on available for sale securities	0.0		0.0		0.1		0.0
Other Comprehensive Income (Loss), Before Tax	8.5		(24.7)		(15.7)		(27.9)
Income Tax Expense (Benefit) Related to Items of Other Comprehensive Income (Loss)	2.0		(5.8)		(3.7)		(6.6)
Other Comprehensive Income (Loss), Net of Tax	6.5		(18.9)		(12.0)		(21.3)
Comprehensive Income	210.8		160.3		277.4		248.9
Operating Revenues	1,128.5		1,123.4		1,885.1		1,937.4
Operating Expenses:
Natural gas	540.8		586.5		907.8		1,005.7
Operation and maintenance	137.8		132.1		268.5		264.2
Depreciation and amortization	68.9		62.6		135.9		124.7
Taxes, other than income taxes	82.4		81.9		135.1		132.3
Total Operating Expenses	829.9		863.1		1,447.3		1,526.9
Operating Income	298.6		260.3		437.8		410.5
Interest Expense, Net	52.2		47.2		102.8		90.8
Other Income, Net	7.3		7.0		24.8		13.0
Income Before Income Taxes	253.7		220.1		359.8		332.7
Income Tax Expense	49.4		40.9		70.4		62.5
Net Income	204.3		179.2		289.4		270.2
Other Comprehensive Income, Net of Tax	6.5		(18.9)		(12.0)		(21.3)
Comprehensive Income	210.8		160.3		277.4		248.9
Spire Missouri [Member]
Net Income	105.2	[1]	112.1		162.2		159.4
Other Comprehensive Income (Loss), Before Tax:
Other Comprehensive Income (Loss), Net of Tax	0.0		0.1	[1]	0.1	[1]	0.2
Comprehensive Income	105.2		112.2		162.3		159.6
Operating Revenues	766.5		791.0		1,301.9		1,332.2
Operating Expenses:
Natural gas	443.7		465.7		736.3		782.4
Operation and maintenance	78.6		77.4		153.5		154.5
Depreciation and amortization	43.1		39.2		85.2		77.8
Taxes, other than income taxes	59.8		61.2		98.3		97.6
Total Operating Expenses	625.2		643.5		1,073.3		1,112.3
Operating Income	141.3		147.5		228.6		219.9
Interest Expense, Net	27.7		24.6		55.6		46.6
Other Income, Net	5.7		5.9		12.9		10.9
Income Before Income Taxes	119.3		128.8		185.9		184.2
Income Tax Expense	14.1		16.7		23.7		24.8
Net Income	105.2	[1]	112.1		162.2		159.4
Other Comprehensive Income, Net of Tax	0.0		0.1	[1]	0.1	[1]	0.2
Comprehensive Income	$ 105.2		$ 112.2		$ 162.3		$ 159.6

[1] Accumulated other comprehensive income (loss)

XML

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Millions	Mar. 31, 2024		Sep. 30, 2023		Mar. 31, 2023
ASSETS
Utility Plant	$ 8,480.3		$ 8,210.1		$ 7,892.4
Less: Accumulated depreciation and amortization	2,509.3		2,431.2		2,358.5
Net Utility Plant	5,971.0		5,778.9		5,533.9
Non-utility Property (net of accumulated depreciation and amortization of $115.9, $71.1 and $60.6 at March 31, 2024, September 30, 2023, and March 31, 2023, respectively)	886.2		628.5		520.4
Other Investments	105.3		102.6		131.3
Total Other Property and Investments	991.5		731.1		651.7
Other Property and Investments	991.5		731.1		651.7
Current Assets:
Cash and cash equivalents	25.6		5.6		6.9
Utility	398.5		192.4		453.7
Other	107.3		128.6		166.0
Allowance for credit losses	(39.1)		(32.5)		(40.6)
Delayed customer billings	54.8		22.0		85.6
Accounts receivable:
Utility	398.5		192.4		453.7
Other	107.3		128.6		166.0
Allowance for credit losses	(39.1)		(32.5)		(40.6)
Delayed customer billings	54.8		22.0		85.6
Inventories:
Natural gas	159.0		223.7		146.8
Propane gas	8.6		8.6		8.6
Materials and supplies	47.2		47.2		48.9
Regulatory assets	116.9		348.3		143.0
Prepayments	34.1		48.2		32.5
Other current assets	92.8		84.8		60.2
Total Current Assets	1,005.7		1,076.9		1,111.6
Deferred Charges and Other Assets:
Goodwill	1,171.6		1,171.6		1,171.6
Regulatory assets	1,272.7		1,249.2		1,316.7
Other	298.9		305.9		263.5
Total Deferred Charges and Other Assets	2,743.2		2,726.7		2,751.8
Total Assets	10,711.4		10,313.6		10,049.0
Capitalization:
Preferred stock ($25.00 par value per share; 10.0 million depositary shares authorized, issued and outstanding at March 31, 2024, September 30, 2023, and March 31, 2023)	242.0		242.0		242.0
Common stock (par value $1.00 per share; 70.0 million shares authorized; 57.7 million, 53.2 million, and 52.6 million shares issued and outstanding at March 31, 2024, September 30, 2023, and March 31, 2023, respectively)	57.7		53.2		52.6
Paid-in capital	1,899.7		1,616.5		1,576.5
Retained earnings	1,155.3		958.0		1,089.5
Accumulated other comprehensive income	35.6		47.6		25.9
Total Shareholders' Equity	3,390.3		2,917.3		2,986.5
Temporary equity	10.3		16.5		18.8
Long-term debt (less current portion)	3,421.4		3,554.0		3,702.5
Total Capitalization	6,822.0		6,487.8		6,707.8
Current Liabilities:
Current portion of long-term debt	307.0		156.6		256.6
Notes payable	786.0		955.5		561.0
Accounts payable	193.4		253.1		232.3
Advance customer billings	6.1		20.9		6.8
Wages and compensation accrued	40.2		47.0		38.6
Customer deposits	29.4		27.7		28.3
Taxes accrued	82.6		104.1		79.9
Regulatory liabilities	25.1		7.3		5.3
Other current liabilities	180.5		183.2		198.1
Total Current Liabilities	1,650.3		1,755.4		1,406.9
Deferred Credits and Other Liabilities:
Deferred income taxes	816.6		743.7		737.9
Pension and postretirement benefit costs	130.0		137.3		158.6
Asset retirement obligations	589.7		577.4		531.5
Regulatory liabilities	557.7		472.4		360.3
Other noncurrent liabilities	145.1		139.6		146.0
Total Deferred Credits and Other Liabilities	2,239.1		2,070.4		1,934.3
Commitments and Contingencies (Note 11)
Total Capitalization and Liabilities	10,711.4		10,313.6		10,049.0
Spire Missouri [Member]
ASSETS
Utility Plant	5,193.5		4,964.9		4,731.2
Less: Accumulated depreciation and amortization	1,088.1		1,043.2		1,027.1
Net Utility Plant	4,105.4		3,921.7		3,704.1
Total Other Property and Investments	67.8		65.7		66.7
Other Property and Investments	67.8		65.7		66.7
Current Assets:
Cash and cash equivalents	0.0		0.8		0.0
Other	23.8		21.1		32.5
Allowance for credit losses	(32.0)		(26.2)		(34.5)
Delayed customer billings	53.6		17.9		84.5
Accounts receivable:
Other	23.8		21.1		32.5
Allowance for credit losses	(32.0)		(26.2)		(34.5)
Delayed customer billings	53.6		17.9		84.5
Inventories:
Natural gas	101.9		132.8		86.7
Propane gas	8.6		8.6		8.6
Materials and supplies	24.0		24.2		24.4
Regulatory assets	89.2		293.1		62.7
Prepayments	17.0		26.7		18.5
Total Current Assets	595.8		642.9		649.2
Deferred Charges and Other Assets:
Goodwill	210.2		210.2		210.2
Regulatory assets	630.5		617.6		722.0
Other	145.2		147.4		107.2
Total Deferred Charges and Other Assets	985.9		975.2		1,039.4
Total Assets	5,754.9		5,605.5		5,459.4
Capitalization:
Retained earnings	1,154.6		992.4		1,061.3
Accumulated other comprehensive income	(2.4)		(2.5)		(2.5)
Total Shareholders' Equity	2,007.1	[1]	1,844.8	[1]	1,875.0
Long-term debt (less current portion)	1,486.2		1,785.4		1,784.5
Total Capitalization	3,493.3		3,630.2		3,659.5
Paid-in capital and common stock	854.9		854.9		816.2
Current Liabilities:
Current portion of long-term debt	300.0		0.0		250.0
Advance customer billings	0.0		11.0		0.0
Wages and compensation accrued	19.9		23.6		20.4
Customer deposits	5.9		5.8		6.0
Taxes accrued	47.0		60.3		47.2
Other current liabilities	44.6		48.7		52.5
Total Current Liabilities	949.5		786.3		726.9
Deferred Credits and Other Liabilities:
Deferred income taxes	563.9		531.8		533.3
Pension and postretirement benefit costs	100.5		103.3		99.8
Asset retirement obligations	113.4		111.1		112.8
Regulatory liabilities	475.3		389.4		276.9
Other noncurrent liabilities	59.0		53.4		50.2
Total Deferred Credits and Other Liabilities	1,312.1		1,189.0		1,073.0
Total Capitalization and Liabilities	5,754.9		5,605.5		5,459.4
Spire Missouri [Member] | Nonrelated Party [Member]
Current Assets:
Utility	307.6		142.6		362.0
Accounts receivable:
Utility	307.6		142.6		362.0
Current Liabilities:
Notes payable	200.0		0.0		200.0
Accounts payable	78.7		85.8		78.8
Spire Missouri [Member] | Related Party [Member]
Current Assets:
Utility	2.1		1.3		3.8
Accounts receivable:
Utility	2.1		1.3		3.8
Current Liabilities:
Notes payable	243.9		540.6		60.7
Accounts payable	9.5		10.5		11.3
Spire Alabama Inc [Member]
ASSETS
Utility Plant	2,900.7		2,862.6		2,781.4
Less: Accumulated depreciation and amortization	1,307.4		1,273.0		1,208.7
Net Utility Plant	1,593.3		1,589.6		1,572.7
Current Assets:
Cash and cash equivalents	1.8		1.2		1.0
Other	6.8		6.6		5.3
Allowance for credit losses	(6.2)		(5.7)		(5.3)
Delayed customer billings	1.0		3.6		1.0
Accounts receivable:
Other	6.8		6.6		5.3
Allowance for credit losses	(6.2)		(5.7)		(5.3)
Delayed customer billings	1.0		3.6		1.0
Inventories:
Natural gas	34.1		52.4		41.4
Materials and supplies	19.2		19.1		20.5
Regulatory assets	14.9		41.6		64.8
Prepayments	3.3		6.4		3.8
Total Current Assets	148.9		168.6		208.7
Deferred Charges and Other Assets:
Regulatory assets	619.1		606.9		568.3
Other	84.2		84.2		81.9
Total Deferred Charges and Other Assets	703.3		691.1		650.2
Total Assets	2,445.5		2,449.3		2,431.6
Capitalization:
Retained earnings	687.5		642.1		645.3
Total Shareholders' Equity	966.9		928.0		935.2
Long-term debt (less current portion)	746.1		745.9		745.7
Total Capitalization	1,713.0		1,673.9		1,680.9
Paid-in capital and common stock	279.4		285.9		289.9
Current Liabilities:
Advance customer billings	4.7		8.1		5.3
Wages and compensation accrued	5.6		6.6		5.4
Customer deposits	20.5		19.3		19.6
Taxes accrued	28.8		34.5		26.4
Regulatory liabilities	18.7		0.0		0.0
Other current liabilities	14.1		14.7		15.7
Total Current Liabilities	163.6		240.3		230.5
Deferred Credits and Other Liabilities:
Deferred income taxes	36.8		9.1		12.3
Pension and postretirement benefit costs	22.5		27.2		52.8
Asset retirement obligations	460.6		451.0		406.9
Regulatory liabilities	20.1		21.2		21.5
Other noncurrent liabilities	28.9		26.6		26.7
Total Deferred Credits and Other Liabilities	568.9		535.1		520.2
Total Capitalization and Liabilities	2,445.5		2,449.3		2,431.6
Spire Alabama Inc [Member] | Nonrelated Party [Member]
Current Assets:
Utility	74.0		42.2		75.4
Accounts receivable:
Utility	74.0		42.2		75.4
Current Liabilities:
Accounts payable	28.4		28.4		29.8
Spire Alabama Inc [Member] | Related Party [Member]
Current Assets:
Utility	0.0		1.2		0.8
Accounts receivable:
Utility	0.0		1.2		0.8
Current Liabilities:
Notes payable	37.4		124.1		121.3
Accounts payable	$ 5.4		$ 4.6		$ 7.0

[1] Accumulated other comprehensive income (loss)

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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Millions	Mar. 31, 2024	Sep. 30, 2023	Mar. 31, 2023
Non-utility property, accumulated depreciation and amortization	$ 115.9	$ 71.1	$ 60.6
Preferred stock, par value (in dollars per share)	$ 25	$ 25	$ 25
Common stock, par value (in dollars per share)	$ 1	$ 1	$ 1
Common stock, shares authorized (in shares)	70,000,000	70,000,000	70,000,000
Common stock, shares issued (in shares)	57,700,000	53,200,000	52,600,000
Common Stock, shares outstanding (in shares)	57,700,000	53,200,000	52,600,000
Depositary Shares [Member]
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	10,000,000	10,000,000	10,000,000
Preferred stock, shares outstanding (in shares)	10,000,000	10,000,000	10,000,000
Spire Missouri [Member]
Common stock, par value (in dollars per share)	$ 1	$ 1	$ 1
Common stock, shares authorized (in shares)	50,000,000	50,000,000	50,000,000
Common stock, shares issued (in shares)	25,855	25,855	25,325
Common Stock, shares outstanding (in shares)	25,855	25,855	25,325
Spire Alabama Inc [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	3,000,000	3,000,000	3,000,000
Common stock, shares issued (in shares)	2,000,000	2,000,000	2,000,000
Common Stock, shares outstanding (in shares)	2,000,000	2,000,000	2,000,000

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Condensed Consolidated Statements of Shareholders' Equity (Unaudited) - USD ($) $ in Millions	Spire Missouri [Member] Common Stock [Member]	Spire Missouri [Member] Additional Paid-in Capital [Member]	Spire Missouri [Member] Retained Earnings [Member]	Spire Missouri [Member] AOCI Attributable to Parent [Member]	Spire Missouri [Member]		Spire Alabama Inc [Member] Common Stock [Member]	Spire Alabama Inc [Member] Additional Paid-in Capital [Member]	Spire Alabama Inc [Member] Retained Earnings [Member]	Spire Alabama Inc [Member]	Common Stock [Member]	Preferred Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]		Total
Balance (in shares) at Sep. 30, 2022	25,325						1,972,052				52,494,543
Balance at Sep. 30, 2022	$ 0.1	$ 816.1	$ 931.9	$ (2.7)	$ 1,745.4		$ 0.0	$ 316.9	$ 589.1	$ 906.0	$ 52.5	$ 242.0	$ 1,571.3	$ 905.5	$ 47.2		$ 2,818.5
Net Income	0.0	0.0	159.4	0.0	159.4		0.0	0.0	69.2	69.2	$ 0.0	0.0	0.0	270.2	0.0		270.2
Common stock issued (in shares)											40,500
Common stock issued											$ 0.1	0.0	2.9	0.0	0.0		3.0
Dividend reinvestment plan (in shares)											11,121
Dividend reinvestment plan											$ 0.0	0.0	0.7	0.0	0.0		0.7
Stock-based compensation costs											$ 0.0	0.0	2.9	0.0	0.0		2.9
Stock activity under stock-based compensation plans (in shares)											64,686
Stock activity under stock-based compensation plans											$ 0.0	0.0	0.0		0.0		0.0
Employees’ tax withholding for stock-based compensation (in shares)											(17,417)
Employees’ tax withholding for stock-based compensation											$ 0.0	0.0	(1.3)	0.0	0.0		(1.3)
Temporary equity adjustment to redemption value											0.0	0.0	0.0	(3.0)	0.0		(3.0)
Common stock, dividends	0.0	0.0	(30.0)	0.0	(30.0)		$ 0.0	0.0	(13.0)	(13.0)	0.0	0.0	0.0	(75.8)	0.0		(75.8)
Other Comprehensive Income, Net of Tax	$ 0.0	0.0	0.0	0.2	0.2						0.0	0.0	0.0	0.0	(21.3)		(21.3)
Preferred stock dividends											$ 0.0	0.0	0.0	(7.4)	0.0		(7.4)
Balance (in shares) at Mar. 31, 2023	25,325						1,972,052				52,593,433
Balance at Mar. 31, 2023	$ 0.1	816.1	1,061.3	(2.5)	1,875.0		$ 0.0	289.9	645.3	935.2	$ 52.6	242.0	1,576.5	1,089.5	25.9	[1]	2,986.5
Return of capital to Spire							$ 0.0	(27.0)	0.0	(27.0)
Balance (in shares) at Dec. 31, 2022	25,325						1,972,052				52,541,696
Balance at Dec. 31, 2022	$ 0.1	816.1	979.2	(2.6)	1,792.8		$ 0.0	305.4	595.3	900.7	$ 52.5	242.0	1,571.8	953.0	44.8	[1]	2,864.1
Net Income	0.0	0.0	112.1	0.0	112.1		0.0	0.0	60.0	60.0	$ 0.0		0.0	179.2	0.0	[1]	179.2
Common stock issued (in shares)											40,500
Common stock issued											$ 0.1	0.0	2.9	0.0	0.0		3.0
Dividend reinvestment plan (in shares)											5,421
Dividend reinvestment plan											$ 0.0	0.0	0.3	0.0	0.0	[1]	0.3
Stock-based compensation costs											$ 0.0		1.5	0.0	0.0	[1]	1.5
Stock activity under stock-based compensation plans (in shares)											6,008
Stock activity under stock-based compensation plans											$ 0.0	0.0	0.0		0.0		0.0
Employees’ tax withholding for stock-based compensation (in shares)											(192)
Employees’ tax withholding for stock-based compensation											$ 0.0	0.0	0.0	0.0	0.0	[1]	0.0
Temporary equity adjustment to redemption value											0.0		0.0	(1.3)	0.0	[1]	(1.3)
Common stock, dividends	0.0	0.0	(30.0)	0.0	(30.0)		$ 0.0	0.0	(10.0)	(10.0)	0.0		0.0	(37.7)	0.0	[1]	(37.7)
Other Comprehensive Income, Net of Tax	$ 0.0	0.0	0.0	0.1	0.1	[1]					0.0	0.0	0.0	0.0	(18.9)		(18.9)
Preferred stock dividends											$ 0.0		0.0	(3.7)	0.0	[1]	(3.7)
Balance (in shares) at Mar. 31, 2023	25,325						1,972,052				52,593,433
Balance at Mar. 31, 2023	$ 0.1	816.1	1,061.3	(2.5)	1,875.0		$ 0.0	289.9	645.3	935.2	$ 52.6	242.0	1,576.5	1,089.5	25.9	[1]	2,986.5
Return of capital to Spire							$ 0.0	(15.5)	0.0	(15.5)
Balance (in shares) at Sep. 30, 2023	25,855						1,972,052				53,170,224
Balance at Sep. 30, 2023	$ 0.1	854.8	992.4	(2.5)	1,844.8	[1]	$ 0.0	285.9	642.1	928.0	$ 53.2	242.0	1,616.5	958.0	47.6		2,917.3
Net Income	0.0	0.0	162.2	0.0	162.2		0.0	0.0	81.8	81.8	$ 0.0	0.0	0.0	289.4	0.0		289.4
Common stock issued (in shares)											4,490,282
Common stock issued											$ 4.4	0.0	281.6	0.0	0.0		286.0
Dividend reinvestment plan (in shares)											13,211
Dividend reinvestment plan											$ 0.0	0.0	0.8	0.0	0.0		0.8
Stock-based compensation costs											$ 0.0	0.0	2.4	0.0	0.0		2.4
Stock activity under stock-based compensation plans (in shares)											92,516
Stock activity under stock-based compensation plans											$ 0.1	0.0	(0.1)		0.0		0.0
Employees’ tax withholding for stock-based compensation (in shares)											(24,541)
Employees’ tax withholding for stock-based compensation											$ 0.0	0.0	(1.5)	0.0	0.0		(1.5)
Temporary equity adjustment to redemption value											0.0	0.0	0.0	(1.4)	0.0		(1.4)
Common stock, dividends							$ 0.0	0.0	(36.4)	(36.4)	0.0	0.0	0.0	(83.3)	0.0		(83.3)
Other Comprehensive Income, Net of Tax	$ 0.0	0.0	0.0	0.1	0.1	[1]					0.0	0.0	0.0	0.0	(12.0)		(12.0)
Preferred stock dividends											$ 0.0	0.0	0.0	(7.4)	0.0		(7.4)
Balance (in shares) at Mar. 31, 2024	25,855						1,972,052				57,741,692
Balance at Mar. 31, 2024	$ 0.1	854.8	1,154.6	(2.4)	2,007.1	[1]	$ 0.0	279.4	687.5	966.9							3,390.3
Return of capital to Spire							$ 0.0	(6.5)	0.0	(6.5)
Balance (in shares) at Dec. 31, 2023	25,855						1,972,052				54,973,694
Balance at Dec. 31, 2023	$ 0.1	854.8	1,049.4	(2.4)	1,901.9	[1]	$ 0.0	284.9	639.2	924.1	$ 55.0	242.0	1,727.4	997.3	29.1	[1]	3,050.8
Net Income	$ 0.0	0.0	105.2	0.0	105.2	[1]	0.0	0.0	70.7	70.7	$ 0.0		0.0	204.3	0.0	[1]	204.3
Common stock issued (in shares)											2,745,733
Common stock issued											$ 2.7	0.0	170.5	0.0	0.0		173.2
Dividend reinvestment plan (in shares)											6,437
Dividend reinvestment plan											$ 0.0	0.0	0.4	0.0	0.0	[1]	0.4
Stock-based compensation costs											$ 0.0		1.5		0.0	[1]	1.5
Stock activity under stock-based compensation plans (in shares)											16,810
Stock activity under stock-based compensation plans											$ 0.0	0.0	0.0		0.0		0.0
Employees’ tax withholding for stock-based compensation (in shares)											(982)
Employees’ tax withholding for stock-based compensation											$ 0.0	0.0	(0.1)	0.0	0.0	[1]	(0.1)
Temporary equity adjustment to redemption value											0.0		0.0	0.5	0.0	[1]	0.5
Common stock, dividends							$ 0.0	0.0	(22.4)	(22.4)	0.0		0.0	(43.1)	0.0	[1]	(43.1)
Other Comprehensive Income, Net of Tax					0.0						$ 0.0	$ 0.0	$ 0.0	$ 0.0	$ 6.5		6.5
Balance (in shares) at Mar. 31, 2024	25,855						1,972,052				57,741,692
Balance at Mar. 31, 2024	$ 0.1	$ 854.8	$ 1,154.6	$ (2.4)	$ 2,007.1	[1]	$ 0.0	279.4	687.5	966.9							$ 3,390.3
Return of capital to Spire							$ 0.0	$ (5.5)	$ 0.0	$ (5.5)

[1] Accumulated other comprehensive income (loss)

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Condensed Consolidated Statements of Shareholders' Equity (Unaudited) (Parentheticals) - $ / shares	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Common stock, dividends per share declared (in dollars per share)	$ 0.755	$ 0.72	$ 1.51	$ 1.44
Preferred stock dividends per share declared (in dollars per share)	$ 0.36875	$ 0.36875	$ 0.7375	$ 0.7375

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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Operating Activities:
Net Income	$ 289.4	$ 270.2
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	135.9	124.7
Deferred income taxes and investment tax credits	69.5	62.5
Changes in assets and liabilities:
Accounts receivable	(175.4)	43.7
Inventories	64.8	218.2
Regulatory assets and liabilities	317.6	(35.5)
Accounts payable	(34.6)	(372.9)
Delayed/advance customer billings, net	(47.7)	(76.3)
Taxes accrued	(21.5)	(10.8)
Other assets and liabilities	(41.7)	(50.6)
Other	3.1	6.7
Net cash provided by operating activities	559.4	179.9
Delayed/advance customer billings	(47.7)	(76.3)
Investing Activities:
Capital expenditures	(409.3)	(307.8)
Business acquisitions, net of cash acquired	(177.4)	(37.1)
Other	2.8	4.2
Net cash used in investing activities	(583.9)	(340.7)
Financing Activities:
Issuance of long-term debt	175.0	755.0
Repayment of long-term debt	(156.6)	(31.2)
Repayment of short-term debt, net	(169.5)	(476.5)
Issuance of common stock	286.8	3.6
Dividends paid on common stock	(80.5)	(74.5)
Dividends paid on preferred stock	(7.4)	(7.4)
Other financing activities	(2.7)	(7.5)
Net cash provided by financing activities	45.1	161.5
Net Increase in Cash, Cash Equivalents, and Restricted Cash	20.6	0.7
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	25.8	20.5
Cash, Cash Equivalents, and Restricted Cash at End of Period	46.4	21.2
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	(102.9)	(80.5)
Income taxes	(0.9)	(1.4)
Spire Missouri [Member]
Operating Activities:
Net Income	162.2	159.4
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	85.2	77.8
Deferred income taxes and investment tax credits	23.3	24.8
Changes in assets and liabilities:
Accounts receivable	(162.6)	(208.9)
Inventories	31.1	126.2
Regulatory assets and liabilities	276.5	0.6
Accounts payable	2.2	(31.5)
Delayed/advance customer billings, net	(46.7)	(75.4)
Taxes accrued	(13.2)	(3.2)
Other assets and liabilities	(10.2)	(47.4)
Other	0.8	0.8
Net cash provided by operating activities	348.6	23.2
Delayed/advance customer billings	(46.7)	(75.4)
Investing Activities:
Capital expenditures	(255.1)	(206.6)
Other	2.4	1.8
Net cash used in investing activities	(252.7)	(204.8)
Financing Activities:
Issuance of long-term debt	0.0	400.0
Repayment of short-term debt, net	200.0	200.0
Dividends paid on common stock	0.0	(30.0)
Other financing activities	0.0	(3.9)
Net cash provided by financing activities	(96.7)	181.6
Net Increase in Cash, Cash Equivalents, and Restricted Cash	(0.8)	0.0
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	0.8	0.0
Cash, Cash Equivalents, and Restricted Cash at End of Period	0.0	0.0
Repayments of borrowings from Spire, net	(296.7)	(384.5)
Repayments of borrowings from Spire, net	(296.7)	(384.5)
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	(60.9)	(44.1)
Income taxes	(0.4)	0.0
Spire Alabama Inc [Member]
Operating Activities:
Net Income	81.8	69.2
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	36.1	34.0
Deferred income taxes and investment tax credits	27.7	23.4
Changes in assets and liabilities:
Accounts receivable	(30.4)	(4.8)
Inventories	18.2	26.9
Regulatory assets and liabilities	40.4	(32.3)
Accounts payable	2.9	(39.2)
Delayed/advance customer billings, net	(0.8)	(0.7)
Taxes accrued	(5.7)	(4.9)
Other assets and liabilities	3.1	12.6
Other	0.2	0.2
Net cash provided by operating activities	173.5	84.4
Delayed/advance customer billings	(0.8)	(0.7)
Investing Activities:
Capital expenditures	(43.6)	(72.9)
Other	0.3	0.7
Net cash used in investing activities	(43.3)	(72.2)
Financing Activities:
Issuance of long-term debt	0.0	175.0
Dividends paid on common stock	(36.4)	(21.0)
Other financing activities	0.0	(1.0)
Net cash provided by financing activities	(129.6)	(13.6)
Net Increase in Cash, Cash Equivalents, and Restricted Cash	0.6	(1.4)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	1.2	2.4
Cash, Cash Equivalents, and Restricted Cash at End of Period	1.8	1.0
Repayments of borrowings from Spire, net	(86.7)	(139.6)
Repayments of borrowings from Spire, net	(86.7)	(139.6)
Return of capital to Spire	(6.5)	(27.0)
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	(17.7)	(12.6)
Income taxes	$ 0.0	$ 0.0

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Note 1 - Summary of Significant Accounting Policies

6 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Significant Accounting Policies [Text Block]

1. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

BASIS OF PRESENTATION – These notes are an integral part of the accompanying unaudited financial statements of Spire Inc. (“Spire” or the “Company”) presented on a consolidated basis, Spire Missouri Inc. (“Spire Missouri”) and Spire Alabama Inc. (“Spire Alabama”). Spire Missouri, Spire Alabama and Spire EnergySouth Inc. (“Spire EnergySouth”) are wholly owned subsidiaries of Spire. Spire Missouri, Spire Alabama and the subsidiaries of Spire EnergySouth (Spire Gulf Inc. and Spire Mississippi Inc.) are collectively referred to as the “Utilities.”

The accompanying unaudited financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) for interim financial information with the instructions to Form 10-Q and Rule 10-01 of Regulation S‑X. Accordingly, they do not include all the disclosures required for complete financial statements. In the opinion of management, the accompanying unaudited financial statements include all adjustments necessary for the fair presentation of the results of operations for the periods presented. This Form 10-Q should be read in conjunction with the Notes to Financial Statements contained in Spire, Spire Missouri and Spire Alabama’s combined Annual Report on Form 10-K for the fiscal year ended September 30, 2023.

The consolidated financial position, results of operations, and cash flows of Spire include the accounts of the Company and all its subsidiaries. Transactions and balances between consolidated entities have been eliminated from the consolidated financial statements of Spire. In compliance with GAAP, transactions between Spire Missouri and Spire Alabama and their affiliates, as well as intercompany balances on their balance sheets, have not been eliminated from their separate financial statements.

NATURE OF OPERATIONS – Spire has three reportable segments: Gas Utility, Gas Marketing, and Midstream. The Gas Utility segment consists of the regulated natural gas distribution operations of the Company and is the core business segment of Spire in terms of revenue and earnings. The Gas Utility segment is comprised of the operations of: Spire Missouri, serving St. Louis, Kansas City, and other areas in Missouri; Spire Alabama, serving central and northern Alabama; and the subsidiaries of Spire EnergySouth, serving the Mobile, Alabama area and south-central Mississippi. The Gas Marketing segment includes Spire’s largest gas-related business, Spire Marketing Inc. (“Spire Marketing”), which provides non-regulated natural gas services throughout the United States (U.S.). The Midstream segment includes Spire Storage, Spire STL Pipeline and Spire MoGas Pipeline, which are subsidiaries engaged in the storage and transportation of natural gas. The activities of the Company’s other subsidiaries are reported as Other and are described in Note 10, Information by Operating Segment. Spire Missouri and Spire Alabama each have a single reportable segment. 

The Company’s earnings are derived primarily from its Gas Utility segment. Due to the seasonal nature of the Utilities’ business and the volumetric Spire Missouri rate design, earnings are typically concentrated during the heating season of November through April each fiscal year. As a result, the interim statements of income for Spire, Spire Missouri and Spire Alabama are not necessarily indicative of annual results or representative of succeeding quarters of the fiscal year.

REGULATED OPERATIONS – The Utilities account for their regulated operations in accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 980, Regulated Operations. This topic sets forth the application of GAAP for those companies whose rates are established by or are subject to approval by an independent third-party regulator. The provisions of this accounting guidance require, among other things, that financial statements of a regulated enterprise reflect the actions of regulators, where appropriate. These actions may result in the recognition of revenues and expenses in time periods that are different than non-regulated enterprises. When this occurs, costs are deferred as assets in the balance sheet (regulatory assets) and recorded as expenses when those amounts are reflected in rates. In addition, regulators can impose liabilities upon a regulated company for amounts previously collected from customers and for recovery of costs that are expected to be incurred in the future (regulatory liabilities). Management believes that the current regulatory environment supports the continued use of these regulatory accounting principles and that all regulatory assets and regulatory liabilities are recoverable or refundable through the regulatory process.

As authorized by the Missouri Public Service Commission (MoPSC), the Mississippi Public Service Commission (MSPSC) and the Alabama Public Service Commission (APSC), the Purchased Gas Adjustment (PGA) clauses and Gas Supply Adjustment (GSA) riders allow the Utilities to pass through to customers the cost of purchased gas supplies. Regulatory assets and liabilities related to the PGA clauses and the GSA riders are both labeled Unamortized Purchased Gas Adjustments herein. See additional information about regulatory assets and liabilities in Note 5, Regulatory Matters.

DERIVATIVES – In the course of their business, certain subsidiaries of Spire enter into commitments associated with the purchase or sale of natural gas. Certain of their derivative natural gas contracts are designated as normal purchases or normal sales and, as such, are excluded from the scope of FASB ASC Topic 815, Derivatives and Hedging. Those contracts are accounted for as executory contracts and recorded on an accrual basis. Revenues and expenses from such contracts are recorded gross. Contracts not designated as normal purchases or normal sales are recorded as derivatives with changes in fair value recognized in earnings in the periods prior to physical delivery. Certain of Spire Marketing’s wholesale purchase and sale transactions are classified as trading activities for financial reporting purposes, with income and expenses presented on a net basis in natural gas expenses in the Condensed Consolidated Statements of Income. Spire also enters into cash flow hedges through execution of interest rate swap contracts to protect itself against adverse movements in interest rates. In the first quarter of fiscal 2024, Spire management determined it was probable the anticipated issuance of certain debt, and therefore the hedged forecasted interest payments, would not occur. The related swap was settled, hedge accounting was discontinued, and amounts previously deferred in “Accumulated other comprehensive income” were reclassified to earnings, such that the entire realized gain of $8.2 was included in “Other income” for Spire Inc. in the quarter ended December 31, 2023.

TRANSACTIONS WITH AFFILIATES – Transactions between affiliates of the Company have been eliminated from the consolidated financial statements of Spire. As reflected in their separate financial statements, Spire Missouri and Spire Alabama borrowed funds from the Company and incurred related interest. Spire Missouri and Spire Alabama also participated in normal intercompany shared services transactions. Spire Missouri’s and Spire Alabama’s other transactions with affiliates are presented below:

	Three Months Ended March 31,				Six Months Ended March 31,
	2024		2023		2024		2023
Spire Missouri
Purchases of natural gas from Spire Marketing	$	5.6	$	13.8	$	10.6	$	42.3
Transportation services received from Spire STL Pipeline		8.3		7.8		16.5		15.9
Transportation services received from Spire MoGas Pipeline		1.4		—		1.4		—
Sales of natural gas to Spire Marketing		0.3		0.1		0.3		0.1
Natural gas storage services from Spire Storage Salt Plains LLC		0.4		—		0.7		—
Spire Alabama
Purchases of natural gas from Spire Marketing	$	—	$	—	$	3.4	$	1.1

RESTRICTED CASH AND OTHER INVESTMENTS – In Spire’s statement of cash flows for the period ended March 31, 2024, total Cash, Cash Equivalents, and Restricted Cash included $20.8, $20.2 and $14.3 of restricted cash reported in “Other Investments” on the Company’s balance sheet as of March 31, 2024,  September 30, 2023, and March 31, 2023, respectively (in addition to amounts shown as “Cash and cash equivalents”). This restricted cash has been segregated and invested in debt securities in a trust account based on collateral requirements for reinsurance at Spire’s risk management company.

BUSINESS COMBINATIONS – On January 19, 2024, a subsidiary in Spire’s Midstream segment acquired MoGas Pipeline, an interstate natural gas pipeline, and Omega Pipeline, a connected gas distribution system in Missouri, to better serve customers in Missouri. MoGas interconnects with Spire STL Pipeline and other regional pipelines to deliver gas to Spire Missouri’s growing customer base in St. Charles, Franklin, and western St. Louis counties, among other utility, municipal, industrial and commercial customers. Omega owns and operates an approximately 75-mile natural gas distribution system within Fort Leonard Wood in south-central Missouri and is interconnected with the MoGas system. The acquisition was accounted for as a business combination in accordance with ASC 805, Business Combinations. The $177.6 preliminary cash consideration transferred is subject to further working capital adjustments as provided in the purchase agreement. This preliminary purchase price was allocated entirely to property, plant and equipment based on their estimated fair value at the acquisition date and recorded as non-utility property in the consolidated balance sheet. The operating revenues and operating income of MoGas and Omega were not material to our consolidated results for the three and six months ended March 31, 2024.

ACCRUED CAPITAL EXPENDITURES – Accrued capital expenditures, shown in the following table, are excluded from capital expenditures in the statements of cash flows until paid.

	March 31,		September 30,		March 31,
	2024		2023		2023
Spire	$	80.4	$	104.3	$	66.3
Spire Missouri		47.2		56.5		35.4
Spire Alabama		2.7		4.6		5.2

ACCOUNTS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES – Trade accounts receivable are recorded at the amounts due from customers, including unbilled amounts. Accounts receivable are written off when they are deemed to be uncollectible. An allowance for expected credit losses is estimated and updated based on relevant data and trends such as accounts receivable aging, historical write-off experience, current write-off trends, economic conditions, and the impact of weather and availability of customer payment assistance on collection trends. For the Utilities, net write-offs as a percentage of revenue has historically been the best predictor of base net write-off experience over time. Management judgment is applied in the development of the allowance due to the complexity of variables and subjective nature of certain relevant factors. The accounts receivable of Spire’s non-utility businesses are evaluated separately from those of the Utilities. The allowance for credit losses for those other businesses is based on a continuous evaluation of the individual counterparty risk and is not significant for the periods presented. Activity in the allowance for credit losses is shown in the following table.

	Spire						Spire Missouri						Spire Alabama
Three Months Ended March 31,	2024			2023			2024			2023			2024			2023
Allowance at beginning of period	$	35.4		$	34.5		$	28.9		$	28.2		$	5.7		$	5.5
Provision for expected credit losses		7.9			8.2			6.2			7.3			1.4			0.5
Write-offs, net of recoveries		(4.2	)		(2.1	)		(3.1	)		(1.0	)		(0.9	)		(0.7	)
Allowance at end of period	$	39.1		$	40.6		$	32.0		$	34.5		$	6.2		$	5.3
Six Months Ended March 31,	2024			2023			2024			2023			2024			2023
Allowance at beginning of period	$	32.5		$	31.9		$	26.2		$	24.9		$	5.7		$	6.3
Provision for expected credit losses		12.0			12.3			9.8			11.1			1.7			0.7
Write-offs, net of recoveries		(5.4	)		(3.6	)		(4.0	)		(1.5	)		(1.2	)		(1.7	)
Allowance at end of period	$	39.1		$	40.6		$	32.0		$	34.5		$	6.2		$	5.3

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Note 2 - Revenue

6 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Revenue from Contract with Customer [Text Block]

2. REVENUE

The following tables show revenue disaggregated by source and customer type.

	Three Months Ended March 31,						Six Months Ended March 31,
	2024			2023			2024			2023
Spire
Gas Utility:
Residential	$	729.5		$	730.2		$	1,222.3		$	1,248.2
Commercial and industrial		267.9			260.3			425.8			430.9
Transportation		36.8			33.3			69.4			64.2
Off-system and other incentive		13.0			6.1			19.4			13.7
Other customer revenue		8.2			4.3			13.7			8.7
Total revenue from contracts with customers		1,055.4			1,034.2			1,750.6			1,765.7
Changes in accrued revenue under alternative revenue programs	17.3				20.3			37.3			21.8
Total Gas Utility operating revenues		1,072.7			1,054.5			1,787.9			1,787.5
Gas Marketing		46.0			60.6			82.3			134.7
Midstream		21.5			16.5			36.4			31.7
Other		4.1			4.1			8.2			8.1
Total before eliminations		1,144.3			1,135.7			1,914.8			1,962.0
Intersegment eliminations (see Note 10, Information by Operating Segment)		(15.8	)		(12.3	)		(29.7	)		(24.6	)
Total Operating Revenues	$	1,128.5		$	1,123.4		$	1,885.1		$	1,937.4

Spire Missouri
Residential	$	532.9	$	570.0	$	921.7	$	970.6
Commercial and industrial		185.7		185.2		295.9		308.1
Transportation		10.1		9.9		19.1		19.0
Off-system and other incentive		12.3		4.5		16.4		9.6
Other customer revenue		5.0		4.3		7.5		6.3
Total revenue from contracts with customers		746.0		773.9		1,260.6		1,313.6
Changes in accrued revenue under alternative revenue programs	20.5			17.1		41.3		18.6
Total Operating Revenues	$	766.5	$	791.0	$	1,301.9	$	1,332.2

Spire Alabama
Residential	$	169.3		$	135.1		$	253.7		$	231.4
Commercial and industrial		68.8			61.5			103.5			95.1
Transportation	24.0			20.8			44.8				40.1
Off-system and other incentive		0.7			1.7			3.0			4.1
Other customer revenue		0.7			0.7			1.6			1.9
Total revenue from contracts with customers		263.5			219.8			406.6			372.6
Changes in accrued revenue under alternative revenue programs		(4.0	)		(1.5	)		(5.0	)		(1.9	)
Total Operating Revenues	$	259.5		$	218.3		$	401.6		$	370.7

Gross receipts taxes associated with the Company’s natural gas utility services are imposed on the Company, Spire Missouri, and Spire Alabama and billed to its customers. The expense amounts (shown in the table below) are reported gross in the “Taxes, other than income taxes” line in the statements of income, and corresponding revenues are reported in “Operating Revenues.”

	Three Months Ended March 31,				Six Months Ended March 31,
	2024		2023		2024		2023
Spire	$	60.0	$	60.2	$	91.1	$	90.6
Spire Missouri		44.0		45.6		66.5		67.7
Spire Alabama		14.1		12.6		21.0		19.4

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Note 3 - Earnings Per Common Share

6 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Earnings Per Share [Text Block]

3. EARNINGS PER COMMON SHARE

	Three Months Ended March 31,				Six Months Ended March 31,
	2024		2023		2024		2023
Basic Earnings Per Common Share:
Net Income	$	204.3	$	179.2	$	289.4	$	270.2
Less: Provision for preferred dividends		3.7		3.7		7.4		7.4
Income allocated to participating securities		0.3		0.4		0.4		0.5
Income Available to Common Shareholders	$	200.3	$	175.1	$	281.6	$	262.3
Weighted Average Common Shares Outstanding (in millions)		55.8		52.5		54.6		52.5
Basic Earnings Per Common Share	$	3.59	$	3.33	$	5.16	$	5.00
Diluted Earnings Per Common Share:
Net Income	$	204.3	$	179.2	$	289.4	$	270.2
Less: Provision for preferred dividends		3.7		3.7		7.4		7.4
Income allocated to participating securities		0.3		0.4		0.4		0.5
Income Available to Common Shareholders	$	200.3	$	175.1	$	281.6	$	262.3
Weighted Average Common Shares Outstanding (in millions)		55.8		52.5		54.6		52.5
Dilutive Effect of forward sales of common stock, restricted stock and restricted stock units (in millions)*		0.1		0.1		0.1		0.1
Weighted Average Diluted Common Shares (in millions)		55.9		52.6		54.7		52.6
Diluted Earnings Per Common Share	$	3.58	$	3.33	$	5.14	$	4.99
* Calculation excludes certain outstanding or potential common shares (shown in millions by period at the right) attributable to (1) forward sales of common stock, (2) stock units subject to performance or market conditions and (3) restricted stock, which could have a dilutive effect in the future		0.4		0.5		0.3		0.4

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Note 4 - Shareholders' Equity

6 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Equity [Text Block]

4. SHAREHOLDERS’ EQUITY

ATM Program

Under Spire’s “at-the-market” (ATM) equity distribution agreement and as authorized by its board of directors, the Company may offer and sell, from time to time, shares of its common stock (including shares of common stock that may be sold pursuant to forward sale agreements entered into in connection with the ATM equity distribution agreement). Settled sales under this ATM program are included in “Common stock issued” in the Condensed Consolidated Statements of Shareholders’ Equity. Specifically in the first quarter of fiscal 2024, on December 11, 2023, 1,744,549 shares were settled, generating $112.2 of net proceeds. On January 25, 2024, Spire’s board approved a new authorization for the sale of additional shares with an aggregate offering price of up to $200.0 through January 2027.

In the second quarter of fiscal 2024, Spire executed forward sale agreements for 204,405 shares of its common stock, which must be settled on or before September 27, 2024. No shares of common stock have been settled under the forward sale agreements. Had all shares under the forward agreements been settled as of March 31, 2024, it would have generated net proceeds of $12.1.

Equity Units

In February 2021, Spire issued 3.5 million equity units, initially in the form of Corporate Units (as defined in the Underwriting Agreement, dated February 9, 2021, filed as Exhibit 1.1 to the Company's Current Report on Form 8-K filed on February 16, 2021). Each Corporate Unit was comprised of (i) a purchase contract obligating the holder to purchase from the Company for a price in cash of fifty dollars, on the purchase contract settlement date ( March 1, 2024, subject to earlier termination or settlement), a certain number of shares of the Company’s common stock and (ii) a 1/20th, or 5%, undivided beneficial ownership interest in one thousand dollars principal amount of the Company’s 2021 Series A 0.75% Remarketable Senior Notes due 2026 (further discussed in Note 6, Financing). Each Corporate Unit purchase contract obligated holders to purchase a variable number of shares of common stock of the Company based on the applicable market value, subject to anti-dilution adjustments. As of March 1, 2024, the applicable market value was calculated to be $58.6809 per share, and after adjustment the holders were obligated to purchase 0.7845 shares of common stock. The Corporate Unit holders purchased an aggregate of 2,745,733 shares of common stock (net of fractional shares) for $175.0, settled on March 5, 2024.

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Note 5 - Regulatory Matters

6 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Public Utilities Disclosure [Text Block]

5. REGULATORY MATTERS

As explained in Note 1, Summary of Significant Accounting Policies, the Utilities account for regulated operations in accordance with FASB ASC Topic 980, Regulated Operations. The following regulatory assets and regulatory liabilities were reflected in the balance sheets of the Company, Spire Missouri and Spire Alabama as of March 31, 2024, September 30, 2023, and March 31, 2023.

	March 31,		September 30,		March 31,
Spire	2024		2023		2023
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	81.4	$	293.2	$	115.3
Other		35.5		55.1		27.7
Total Current Regulatory Assets		116.9		348.3		143.0
Noncurrent:
Pension and postretirement benefit costs		251.4		261.0		273.1
Cost of removal		649.2		633.2		516.4
Future income taxes due from customers		146.6		144.5		139.3
Energy efficiency		58.2		56.3		59.4
Unamortized purchased gas adjustments		—		23.0		181.3
Other		167.3		131.2		147.2
Total Noncurrent Regulatory Assets		1,272.7		1,249.2		1,316.7
Total Regulatory Assets	$	1,389.6	$	1,597.5	$	1,459.7
Regulatory Liabilities:
Current:
Unamortized purchased gas adjustments	$	19.8	$	—	$	—
Other		5.3		7.3		5.3
Total Current Regulatory Liabilities		25.1		7.3		5.3
Noncurrent:
Deferred taxes due to customers		120.9		128.0		135.8
Pension and postretirement benefit costs		192.6		185.2		161.0
Accrued cost of removal		133.5		126.6		34.6
Unamortized purchased gas adjustments		90.8		11.2		—
Other		19.9		21.4		28.9
Total Noncurrent Regulatory Liabilities		557.7		472.4		360.3
Total Regulatory Liabilities	$	582.8	$	479.7	$	365.6

	March 31,		September 30,		March 31,
Spire Missouri	2024		2023		2023
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	81.0	$	269.4	$	58.7
Other		8.2		23.7		4.0
Total Current Regulatory Assets		89.2		293.1		62.7
Noncurrent:
Future income taxes due from customers		138.5		136.2		130.9
Pension and postretirement benefit costs		183.6		189.1		195.5
Energy efficiency		58.2		56.3		59.4
Unamortized purchased gas adjustments		—		23.0		181.3
Cost of removal		97.0		97.0		24.2
Other		153.2		116.0		130.7
Total Noncurrent Regulatory Assets		630.5		617.6		722.0
Total Regulatory Assets	$	719.7	$	910.7	$	784.7
Regulatory Liabilities:
Noncurrent:
Deferred taxes due to customers	$	108.3	$	114.8	$	121.3
Pension and postretirement benefit costs		165.4		156.5		132.7
Accrued cost of removal		95.8		90.4		—
Unamortized purchased gas adjustments		90.8		11.2		—
Other		15.0		16.5		22.9
Total Noncurrent Regulatory Liabilities		475.3		389.4		276.9
Total Regulatory Liabilities	$	475.3	$	389.4	$	276.9

	March 31,		September 30,		March 31,
Spire Alabama	2024		2023		2023
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	—	$	21.7	$	53.6
Other		14.9		19.9		11.2
Total Current Regulatory Assets		14.9		41.6		64.8
Noncurrent:
Future income taxes due from customers		1.9		2.0		2.0
Pension and postretirement benefit costs		64.2		67.8		73.1
Cost of removal		552.2		536.2		492.2
Other		0.8		0.9		1.0
Total Noncurrent Regulatory Assets		619.1		606.9		568.3
Total Regulatory Assets	$	634.0	$	648.5	$	633.1
Regulatory Liabilities:
Current:
Unamortized purchased gas adjustments	$	18.7	$	—	$	—
Total Current Regulatory Liabilities		18.7		—		—
Noncurrent:
Pension and postretirement benefit costs		16.8		17.9		18.0
Other		3.3		3.3		3.5
Total Noncurrent Regulatory Liabilities		20.1		21.2		21.5
Total Regulatory Liabilities	$	38.8	$	21.2	$	21.5

A portion of the Company’s and Spire Missouri’s regulatory assets are not earning a return, as shown in the table below:

	March 31,		September 30,		March 31,
	2024		2023		2023
Spire
Pension and postretirement benefit costs	$	133.8	$	133.4	$	127.8
Future income taxes due from customers		144.7		142.5		137.2
Unamortized purchased gas adjustments		81.0		292.4		240.0
Other		127.7		104.2		102.4
Total Regulatory Assets Not Earning a Return	$	487.2	$	672.5	$	607.4
Spire Missouri
Pension and postretirement benefit costs	$	133.8	$	133.4	$	127.8
Future income taxes due from customers		138.5		136.2		130.9
Unamortized purchased gas adjustments		81.0		292.4		240.0
Other		127.7		104.2		102.4
Total Regulatory Assets Not Earning a Return	$	481.0	$	666.2	$	601.1

Like all the Company’s regulatory assets, these regulatory assets as of March 31, 2024 are expected to be recovered from customers in future rates. The recovery period for the future income taxes due from customers and pension and other postretirement benefit costs could be 20 years or longer, based on current Internal Revenue Service guidelines and average remaining service life of active participants, respectively. The recovery period for the PGA assets is less than two years. The other items not earning a return are expected to be recovered over a period not to exceed 15 years, consistent with precedent set by the MoPSC, except for certain debt costs expected to be recovered over the related debt term, up to 35 years. Spire Alabama does not have any regulatory assets that are not earning a return.

Spire Missouri

In 2022, the MoPSC initiated their annual ACA dockets (GR-2022-0135 and GR-2022-0136) to audit gas commodity and transportation costs for the 2020-2021 heating season, which included the impact of a period of unusually severe cold weather in mid- February 2021 (“Winter Storm Uri”) on Spire Missouri’s natural gas portfolio. In December 2022, the MoPSC staff filed its Reports and Recommendations in these cases proposing various disallowances relating to imbalance cash-outs and an off-system sale. In  January 2023, Spire Missouri filed its response to this proposal setting forth its position that there is no basis in law or fact for either disallowance. In  November 2023, Spire Missouri filed an unopposed settlement stipulation by which the MoPSC Staff agreed to withdraw its recommendation of a proposed disallowance relating to imbalance cash-outs. In April 2024, Spire Missouri and the MoPSC Staff reached an agreement in principle to resolve the proposed off-system sale disallowance, and the parties are working to finalize a settlement stipulation which is not expected to impact historically reported results.

The Infrastructure System Replacement Surcharge (ISRS) allows Spire Missouri expedited recovery for its investment to replace qualifying components of its infrastructure without the necessity of a formal rate case. All prior ISRS revenues were reset to zero as of December 26, 2022 as a result of Spire Missouri’s most recent base rate case. In  April 2023, the MoPSC approved an annual ISRS revenue increase of $7.7, effective May 6, 2023, reflecting eligible pipe replacement from October 2022 through February 2023. In October 2023, the MoPSC approved an incremental annual ISRS revenue increase of $12.4, effective October 23, 2023, reflecting eligible pipe replacement from March 2023 through August 2023. On January 17, 2024, Spire Missouri initiated an ISRS case reflecting eligible capital projects from September 2023 through February 2024. After Spire Missouri's true-up filing in March 2024, the MoPSC approved in April 2024, an incremental revenue increase of $16.8, for a total cumulative ISRS revenue of $36.9, tentatively expected to be effective in May 2024.

In fiscal 2023, the MoPSC approved increases in the PGA in Spire Missouri’s tariff effective in November 2022 and January 2023. In fiscal 2024, the MoPSC approved a slight decrease in the PGA in Spire Missouri’s western service territory tariff effective in November 2023 and no change in the eastern service territory. These modifications reflect changes in natural gas commodity prices. Deferred gas balances remaining from prior periods were also reflected in the recently approved tariff rates and have been almost fully recovered as of March 31, 2024.

Spire Alabama

In the first quarter of fiscal 2023, Spire Alabama made its annual Rate Stabilization and Equalization (RSE) rate filing with the APSC, presenting the utility’s budget for the fiscal year ended September 30, 2023, and new rates designed to provide an annual revenue increase of $15.0 became effective January 1, 2023. On October 26, 2023, Spire Alabama made its annual RSE rate filing, presenting the utility’s budget for the fiscal year ending September 30, 2024. After an amended filing on December 27, 2023, new rates designed to provide an annual revenue increase of $14.3 became effective January 1, 2024.

Spire Alabama’s rate schedules for natural gas distribution charges contain a GSA rider which permits the pass-through to customers of changes in the cost of gas supply. In fiscal 2023, GSA rate increases were effective December 1, 2022 and  January 1, 2023, and in fiscal 2024, GSA rate decreases were effective October 1, 2023,  January 1, 2024, and April 1, 2024, primarily attributable to changes in natural gas commodity prices.

Spire

In addition to those discussed above for Spire Missouri and Spire Alabama, Spire is affected by the following regulatory matters.

On October 26, 2022, Spire Gulf made its annual RSE filing (based on its budget for fiscal 2023), which was reviewed by the APSC and the Alabama Attorney General’s Office (AGO) resulting in an amended RSE filing made on December 21, 2022 reflecting an increase in annual revenues of $2.5 effective January 1, 2023. Spire Gulf’s April 30, 2023 RSE point of test filing reflected that its projected return on average common equity (RCE) exceeded the allowed RCE, resulting in an annualized refund of $1.8 that became effective July 1, 2023. Spire Gulf’s September 30, 2023 RSE point of test reflected that its actual RCE still exceeded the allowed RCE, resulting in an additional annualized refund of $2.0 that became effective December 13, 2023. On October 26, 2023, Spire Gulf made its annual RSE filing (based on its budget for fiscal 2024). Following review by the APSC and AGO, Spire Gulf made an amended RSE filing on December 12, 2023 reflecting a further increase in annual revenues of $2.7 which became effective December 13, 2023.

On September 14, 2022, Spire Mississippi filed its Rate Stabilization Adjustment Rider (RSA) with the Mississippi Public Service Commission (MSPSC) for the rate year ended June 30, 2022, and the MSPSC, by its order dated December 6, 2022, approved a stipulation agreement between the Mississippi Public Utility Staff and Spire Mississippi that provides for a $0.8 increase in annual revenues through rates that became effective on January 1, 2023. Similarly, on September 1, 2023, Spire Mississippi filed its RSA with the MSPSC for the rate year ended June 30, 2023, and the MSPSC, by its order dated December 14, 2023, approved a stipulation agreement between the Mississippi Public Utility Staff and Spire Mississippi that provides for another $0.8 increase in annual revenues through rates that became effective on January 1, 2024.

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Note 6 - Financing

6 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Debt Disclosure [Text Block]

6. FINANCING

Short-term

Spire, Spire Missouri and Spire Alabama have a syndicated revolving credit facility pursuant to a loan agreement with 12 banks through July 22, 2027. The agreement has an aggregate credit commitment of $1,300.0, including sublimits of $450.0 for the Spire holding company, $575.0 for Spire Missouri and $275.0 for Spire Alabama. These sublimits may be reallocated from time to time among the three borrowers within the $1,300.0 aggregate commitment, with commitment fees and interest margins applied for each borrower relative to its credit rating, as well as sustainability rate adjustments based on Spire’s DART (“Days Away Restricted or Transferred”) rate and methane emissions reductions. The Spire holding company may use its line to provide for the funding needs of various subsidiaries. The agreement also contains financial covenants limiting each borrower’s consolidated total debt, including short-term debt, to no more than 70% of its total capitalization. As defined in the line of credit, on March 31, 2024, total debt was less than 65% of total capitalization for each borrower. There were no borrowings against this credit facility as of March 31, 2024.

Spire has a commercial paper program (“CP Program”) pursuant to which it may issue short-term, unsecured commercial paper notes. Amounts available under the CP Program may be borrowed, repaid and re-borrowed from time to time, with the aggregate face or principal amount of the notes outstanding under the CP Program at any time not to exceed $1,300.0. The notes may have maturities of up to 365 days from date of issue.

On January 3, 2024, Spire Missouri entered into a short-term loan agreement with several banks for a $200.0 unsecured term loan due October 3, 2024. Interest accrues at the one-month term secured overnight financing rate (“SOFR”) plus a SOFR adjustment of 0.10% per annum plus a margin of 0.90% per annum. Spire Missouri repaid $50.0 of this loan on April 5, 2024.

Information about short-term borrowings, including Spire Missouri’s and Spire Alabama’s borrowings from Spire, is presented in the following table. As of March 31, 2024, $319.8 of Spire’s CP Program borrowings was used to support lending to the Utilities.

	Spire (Parent Only)			Spire Missouri						Spire Alabama			Spire
	CP			Term			Spire			Spire			Consol-
	Program			Loan			Note			Note			idated
Six Months Ended March 31, 2024
Highest borrowings outstanding	$	1,135.0		$	200.0		$	643.6		$	132.5		$	1,275.0
Lowest borrowings outstanding		554.6			—			234.7			25.2			754.6
Weighted average borrowings		930.6			97.3			469.9			94.5			1,027.9
Weighted average interest rate		5.7	%		6.7	%		5.7	%		5.7	%		5.8	%
As of March 31, 2024
Borrowings outstanding	$	586.0		$	200.0		$	243.9		$	37.4		$	786.0
Weighted average interest rate		5.6	%		6.3	%		5.6	%		5.6	%		5.8	%
As of September 30, 2023
Borrowings outstanding	$	955.5		$	—		$	540.6		$	124.1		$	955.5
Weighted average interest rate		5.6	%		n/a			5.6	%		5.6	%		5.6	%
As of March 31, 2023
Borrowings outstanding	$	361.0		$	200.0		$	60.7		$	121.3		$	561.0
Weighted average interest rate		5.3	%		5.6	%		5.3	%		5.3	%		5.4	%

Long-term

In February 2024, Spire successfully remarketed on behalf of the selling securityholders the 2021 Series A 0.75% Remarketable Senior Notes due 2026, which were originally issued in February 2021 as a component of the equity units further discussed in Note 4, Shareholders’ Equity. As a result, the interest rate on that original $175.0 obligation was reset to 5.300%. Also in February 2024, Spire sold an additional $175.0 aggregate principal amount of these 5.300% Senior Notes due March 1, 2026, with interest payable semiannually. Spire received net proceeds of $173.5 from this offering.

The long-term debt agreements of Spire, Spire Missouri and Spire Alabama contain customary financial covenants and default provisions. As of March 31, 2024, there were no events of default under these financial covenants.

Interest expense shown on the statements of income is net of the capitalized interest amounts shown in the following table.

	Three Months Ended March 31,				Six Months Ended March 31,
	2024		2023		2024		2023
Spire	$	4.0	$	1.9	$	7.8	$	3.5
Spire Missouri		1.1		0.6		2.3		1.1
Spire Alabama		0.4		0.6		0.8		1.3

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Note 7 - Fair Value of Financial Instruments

6 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Fair Value Disclosures [Text Block]

7. FAIR VALUE OF FINANCIAL INSTRUMENTS

The carrying amounts of cash and cash equivalents, notes receivable, and short-term debt approximate fair value due to the short maturity of these instruments. The fair values of long-term debt are estimated based on market prices for similar issues. Refer to Note 8, Fair Value Measurements, for information on financial instruments measured at fair value on a 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 March 31, 2024, September 30, 2023, and March 31, 2023.

					Classification of Estimated Fair Value
	Carrying Amount		Fair Value		Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)
Spire
As of March 31, 2024
Cash and cash equivalents	$	25.6	$	25.6	$	25.6	$	—
Notes payable		786.0		786.0		—		786.0
Long-term debt, including current portion		3,728.4		3,452.0		—		3,452.0
As of September 30, 2023
Cash and cash equivalents	$	5.6	$	5.6	$	5.6	$	—
Notes payable		955.5		955.5		—		955.5
Long-term debt, including current portion		3,710.6		3,270.2		—		3,270.2
As of March 31, 2023
Cash and cash equivalents	$	6.9	$	6.9	$	6.9	$	—
Notes payable		561.0		561.0		—		561.0
Long-term debt, including current portion		3,959.1		3,704.2		—		3,704.2
Spire Missouri
As of March 31, 2024
Notes payable	$	200.0	$	200.0	$	—	$	200.0
Notes payable – associated companies		243.9		243.9		—		243.9
Long-term debt, including current portion		1,786.2		1,649.4		—		1,649.4
As of September 30, 2023
Cash and cash equivalents	$	0.8	$	0.8	$	0.8	$	—
Notes payable – associated companies		540.6		540.6		—		540.6
Long-term debt		1,785.4		1,592.4		—		1,592.4
As of March 31, 2023
Notes payable	$	200.0	$	200.0	$	—	$	200.0
Notes payable – associated companies		60.7		60.7		—		60.7
Long-term debt, including current portion		2,034.5		1,930.2		—		1,930.2
Spire Alabama
As of March 31, 2024
Cash and cash equivalents	$	1.8	$	1.8	$	1.8	$	—
Notes payable – associated companies		37.4		37.4		—		37.4
Long-term debt		746.1		685.3		—		685.3
As of September 30, 2023
Cash and cash equivalents	$	1.2	$	1.2	$	1.2	$	—
Notes payable – associated companies		124.1		124.1		—		124.1
Long-term debt		745.9		648.0		—		648.0
As of March 31, 2023
Cash and cash equivalents	$	1.0	$	1.0	$	1.0	$	—
Notes payable – associated companies		121.3		121.3		—		121.3
Long-term debt		745.7		696.6		—		696.6

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Note 8 - Fair Value Measurements

6 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block]

8. FAIR VALUE MEASUREMENTS

The information presented in the following tables categorizes the assets and liabilities in the balance sheets that are accounted for at fair value on a recurring basis in periods subsequent to initial recognition.

The mutual funds included in Level 1 are valued based on exchange-quoted market prices of individual securities.

Derivative instruments included in Level 1 are valued using quoted market prices on the New York Mercantile Exchange (NYMEX) or the Intercontinental Exchange (ICE), and also certain natural gas commodity contracts. Derivative instruments classified in Level 2 include derivatives that are valued using broker or dealer quotation services or published benchmarks whose prices are derived principally from, or are corroborated by, observable market inputs. Also included in Level 2 are certain derivative instruments that have values that are similar to, and correlate with, quoted prices for exchange-traded instruments or in active markets. Derivative instruments included in Level 3 are valued using generally unobservable inputs that are based upon the best information available and reflect management’s assumptions about how market participants would price the asset or liability. There were no Level 3 balances as of March 31, 2024, September 30, 2023, or  March 31, 2023. The Company’s and the Utilities’ policy is to recognize transfers between the levels of the fair value hierarchy, if any, as of the beginning of the interim reporting period in which circumstances change or events occur to cause the transfer.

The mutual funds are included in “Other Investments” on the Company’s balance sheets and in “Other Property and Investments” on Spire Missouri’s balance sheets. Changes in their recurring valuations are recorded as unrealized gains or losses in the corresponding income statement. Derivative assets and liabilities, including receivables and payables associated with cash margin requirements, are presented net in the balance sheets when a legally enforceable netting agreement exists between the Company, Spire Missouri, or Spire Alabama and the counterparty to a derivative contract.

Spire

	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Effects of Netting and Cash Margin Receivables /Payables			Total
As of March 31, 2024
ASSETS
Gas Utility:
U.S. stock/bond mutual funds	$	22.6	$	—	$	—		$	22.6
NYMEX/ICE natural gas contracts		3.7		—		(3.7	)		—
Gasoline and heating oil contracts		—		0.1		(0.1	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		8.6		—		(8.6	)		—
Natural gas commodity contracts		—		62.2		(2.6	)		59.6
Other:
U.S. stock/bond mutual funds		16.6		—		—			16.6
U.S. bonds		17.1		—		—			17.1
Global bonds		1.4		—		—			1.4
Interest rate swaps		—		29.0		—			29.0
Total	$	70.0	$	91.3	$	(15.0	)	$	146.3
LIABILITIES
Gas Utility:
NYMEX/ICE natural gas contracts	$	35.7	$	—	$	(35.7	)	$	—
Gas Marketing:
NYMEX/ICE natural gas contracts		30.7		—		(30.7	)		—
Natural gas commodity contracts		—		25.3		(2.6	)		22.7
Total	$	66.4	$	25.3	$	(69.0	)	$	22.7

	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Effects of Netting and Cash Margin Receivables /Payables			Total
As of September 30, 2023
ASSETS
Gas Utility:
U.S. stock/bond mutual funds	$	20.4	$	—	$	—		$	20.4
NYMEX/ICE natural gas contracts		6.3		—		(6.3	)		—
Gasoline and heating oil contracts		—		0.1		(0.1	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		10.1		—		(10.1	)		—
Natural gas commodity contracts		—		36.7		(3.6	)		33.1
Other:
U.S. stock/bond mutual funds		37.6		—		—			37.6
Interest rate swaps		—		44.2		—			44.2
Total	$	74.4	$	81.0	$	(20.1	)	$	135.3
LIABILITIES
Gas Utility:
NYMEX/ICE natural gas contracts	$	50.8	$	—	$	(44.0	)	$	6.8
Gas Marketing:
NYMEX/ICE natural gas contracts		21.8		—		(21.8	)		—
Natural gas commodity contracts		—		27.6		(3.6	)		24.0
Total	$	72.6	$	27.6	$	(69.4	)	$	30.8
As of March 31, 2023
ASSETS
Gas Utility:
U.S. stock/bond mutual funds	$	20.7	$	—	$	—		$	20.7
NYMEX/ICE natural gas contracts		0.1		—		(0.1	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		31.9		—		(31.9	)		—
Natural gas commodity contracts *		—		39.2		(1.3	)		37.9
Other:
U.S. stock/bond mutual funds		29.2		—		—			29.2
Interest rate swaps *		—		16.5		—			16.5
Total	$	81.9	$	55.7	$	(33.3	)	$	104.3
LIABILITIES
Gas Utility:
NYMEX/ICE natural gas contracts	$	62.7	$	—	$	(62.7	)	$	—
Gasoline and heating oil contracts		0.5		—		(0.5	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		48.1		—		(48.1	)		—
Natural gas commodity contracts *		—		32.4		(1.3	)		31.1
Other:
Interest rate swaps *		—		2.2		—			2.2
Total	$	111.3	$	34.6	$	(112.6	)	$	33.3

* Subsequent to the issuance of its consolidated financial statements for the quarter ended March 31, 2023, during the fourth quarter of fiscal 2023, the Company identified an error in the fair value level presentation for certain line items in the Fair Value Measurements table. The presentation has been corrected to reflect the impacted line items in Level 2 rather than Level 1 as of March 31, 2023. This immaterial correction did not impact the reported fair values or the consolidated financial statements.

Spire Missouri

	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Effects of Netting and Cash Margin Receivables /Payables			Total
As of March 31, 2024
ASSETS
U.S. stock/bond mutual funds	$	22.6	$	—	$	—		$	22.6
NYMEX/ICE natural gas contracts		3.7		—		(3.7	)		—
Gasoline and heating oil contracts		—		0.1		(0.1	)		—
Total	$	26.3	$	0.1	$	(3.8	)	$	22.6
LIABILITIES
NYMEX/ICE natural gas contracts	$	35.7	$	—	$	(35.7	)	$	—
As of September 30, 2023
ASSETS
U.S. stock/bond mutual funds	$	20.4	$	—	$	—		$	20.4
NYMEX/ICE natural gas contracts		6.3		—		(6.3	)		—
Gasoline and heating oil contracts		—		0.1		(0.1	)		—
Total	$	26.7	$	0.1	$	(6.4	)	$	20.4
LIABILITIES
NYMEX/ICE natural gas contracts	$	50.8	$	—	$	(44.0	)	$	6.8
As of March 31, 2023
ASSETS
U.S. stock/bond mutual funds	$	20.7	$	—	$	—		$	20.7
NYMEX/ICE natural gas contracts		0.1		—		(0.1	)		—
Total	$	20.8	$	—	$	(0.1	)	$	20.7
LIABILITIES
NYMEX/ICE natural gas contracts	$	62.7	$	—	$	(62.7	)	$	—
Gasoline and heating oil contracts		0.5		—		(0.5	)		—
Total	$	63.2	$	—	$	(63.2	)	$	—

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Note 9 - Pension Plans and Other Postretirement Benefits

6 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Retirement Benefits [Text Block]

9. PENSION PLANS AND OTHER POSTRETIREMENT BENEFITS

Pension Plans

Spire and the Utilities maintain pension plans for their employees.

Spire Missouri and Spire Alabama have non-contributory, defined benefit, trusteed forms of pension plans covering the majority of their employees. Qualified plan assets are comprised of mutual and commingled funds consisting of U.S. equities with varying strategies, global equities, alternative investments, and fixed income investments.

The net periodic pension cost includes components shown in the following tables. The components other than the service costs and regulatory adjustment are presented in “Other Income, Net” in the income statement, except for Spire Alabama’s losses on lump-sum settlements. Such losses are capitalized in regulatory balances and amortized over the remaining actuarial life of individuals in the plan, and that amortization is presented in “Other Income, Net.”

	Three Months Ended March 31,						Six Months Ended March 31,
	2024			2023			2024			2023
Spire
Service cost – benefits earned during the period	$	3.9		$	3.9		$	7.9		$	8.0
Interest cost on projected benefit obligation		6.6			5.9			13.4			12.3
Expected return on plan assets		(6.1	)		(5.7	)		(12.4	)		(12.1	)
Amortization of prior service credit		(1.2	)		(1.2	)		(2.3	)		(2.3	)
Amortization of actuarial loss		1.6			1.6			3.2			3.2
Loss on lump-sum settlements		—			—			—			8.6
Subtotal		4.8			4.5			9.8			17.7
Regulatory adjustment		8.8			10.4			17.5			12.2
Net pension cost	$	13.6		$	14.9		$	27.3		$	29.9
Spire Missouri
Service cost – benefits earned during the period	$	2.6		$	2.9		$	5.2		$	5.7
Interest cost on projected benefit obligation		4.7			4.4			9.5			8.9
Expected return on plan assets		(4.2	)		(4.5	)		(8.5	)		(9.0	)
Amortization of prior service credit		(0.5	)		(0.5	)		(1.0	)		(1.0	)
Amortization of actuarial loss		1.4			1.6			2.9			3.1
Subtotal		4.0			3.9			8.1			7.7
Regulatory adjustment		6.3			8.1			12.6			16.2
Net pension cost	$	10.3		$	12.0		$	20.7		$	23.9
Spire Alabama
Service cost – benefits earned during the period	$	1.1		$	0.8		$	2.3		$	1.9
Interest cost on projected benefit obligation		1.2			0.8			2.5			2.1
Expected return on plan assets		(1.2	)		(0.5	)		(2.4	)		(1.6	)
Amortization of prior service credit		(0.6	)		(0.6	)		(1.2	)		(1.2	)
Amortization of actuarial loss		0.3			0.2			0.5			0.3
Loss on lump-sum settlements		—			—			—			8.6
Subtotal		0.8			0.7			1.7			10.1
Regulatory adjustment		2.3			2.1			4.5			(4.4	)
Net pension cost	$	3.1		$	2.8		$	6.2		$	5.7

Pursuant to the provisions of Spire Missouri’s and Spire Alabama’s pension plans, pension obligations may be satisfied by monthly annuities, lump-sum cash payments, or special termination benefits. Lump-sum payments are recognized as settlements (which can result in gains or losses) only if the total of such payments exceeds the sum of service and interest costs in a specific year. Special termination benefits, when offered, are also recognized as settlements which can result in gains or losses. For the three and six months ended March 31, 2024, no Spire plans met the criteria for settlement recognition.

For the six months ended March 31, 2023, two Spire Alabama plans met the criteria for settlement recognition. The lump-sum payments recognized as settlements for the remeasurement were $27.5 for the Spire Alabama plans. The lump-sum settlements resulted in a loss of $8.6 for Spire Alabama. The Spire Alabama regulatory tariff requires that settlement losses be amortized over the remaining actuarial life of the individuals in the plan — in this case, 13.4 years for one plan and 12.4 years for the other plan. Therefore, no lump sum settlement expense was recorded in the six months ended March 31, 2023.

Effective December 23, 2021, the pension cost for Spire Missouri’s western territory (“Missouri West”) included in customer rates was reduced from $5.5 to $4.4 per year, the pension cost included in Spire Missouri’s eastern territory (“Missouri East”) customer rates was increased from $29.0 to $32.4 per year. Subsequently, on December 26, 2022, the amount in Missouri East was lowered to $29.9. The difference between these amounts and pension expense as calculated pursuant to the above and that otherwise would be included in the statements of income and statements of comprehensive income is deferred as a regulatory asset or regulatory liability.

Also effective December 23, 2021, Missouri East prepaid pension assets and other postretirement benefits that were previously being included in rates at $21.6 per year for eight years were reduced to $11.0 per year, with the amortization period being reset for another eight years. Missouri West net liability for pension and other postretirement benefits that were previously reducing rates by $3.3 per year for eight years were reduced to a $1.1 reduction in rates per year, with the amortization period being reset for another eight years. Subsequently, on December 26, 2022, Missouri East amortization was lowered to $6.9 and Missouri West to a reduction of $0.8.

The funding policy of the Utilities is to contribute an amount not less than the minimum required by government funding standards, nor more than the maximum deductible amount for federal income tax purposes. Fiscal 2024 contributions to Spire Missouri’s pension plans through March 31, 2024 were $5.0 to the qualified trusts and none to non-qualified plans. Fiscal 2024 contributions to the Spire Alabama pension plans through March 31, 2024 were $5.4. Contributions totaling $16.6 to the qualified trusts of Spire Missouri’s pension plans are anticipated for the remainder of fiscal 2024. Contributions to Spire Alabama’s pension plans for the remainder of fiscal 2024 are anticipated to be $11.0.

Other Postretirement Benefits

Spire and the Utilities provide certain life insurance benefits at retirement. Spire Missouri plans provide for medical insurance after early retirement until age 65. For retirements prior to January 1, 2015, certain Spire Missouri plans provided medical insurance after retirement until death. The Spire Alabama plans provide medical insurance upon retirement until death for certain retirees depending on the type of employee and the date the employee was originally hired.

The net periodic postretirement benefit cost includes components shown in the following tables. The components other than the service costs and regulatory adjustment are presented in “Other Income, Net” in the income statement, except in the event Spire Alabama incurs losses on lump-sum settlements. Any such losses are capitalized in regulatory balances and amortized over the remaining actuarial life of individuals in the plan, and that amortization is presented in “Other Income, Net.”

	Three Months Ended March 31,						Six Months Ended March 31,
	2024			2023			2024			2023
Spire
Service cost – benefits earned during the period	$	1.0		$	1.2		$	2.1		$	2.4
Interest cost on accumulated postretirement benefit obligation		2.4			2.2			4.5			4.3
Expected return on plan assets		(4.2	)		(3.9	)		(8.2	)		(7.8	)
Amortization of prior service cost		0.1			—			0.2			0.1
Amortization of actuarial gain		(1.1	)		(1.1	)		(2.1	)		(2.1	)
Subtotal		(1.8	)		(1.6	)		(3.5	)		(3.1	)
Regulatory adjustment		0.3			0.2			0.5			0.3
Net postretirement benefit income	$	(1.5	)	$	(1.4	)	$	(3.0	)	$	(2.8	)
Spire Missouri
Service cost – benefits earned during the period	$	0.9		$	1.0		$	1.8		$	2.0
Interest cost on accumulated postretirement benefit obligation		1.7			1.7			3.3			3.3
Expected return on plan assets		(2.7	)		(2.7	)		(5.4	)		(5.3	)
Amortization of prior service cost		0.1			0.1			0.3			0.3
Amortization of actuarial gain		(0.9	)		(0.8	)		(1.8	)		(1.6	)
Subtotal		(0.9	)		(0.7	)		(1.8	)		(1.3	)
Regulatory adjustment		0.7			0.7			1.3			1.3
Net postretirement benefit income	$	(0.2	)	$	—		$	(0.5	)	$	—
Spire Alabama
Service cost – benefits earned during the period	$	0.1		$	0.1		$	0.3		$	0.3
Interest cost on accumulated postretirement benefit obligation		0.6			0.5			1.1			0.9
Expected return on plan assets		(1.3	)		(1.3	)		(2.6	)		(2.5	)
Amortization of prior service credit		—			(0.1	)		(0.1	)		(0.2	)
Amortization of actuarial gain		(0.1	)		(0.2	)		(0.1	)		(0.3	)
Subtotal		(0.7	)		(1.0	)		(1.4	)		(1.8	)
Regulatory adjustment		(0.5	)		(0.4	)		(0.9	)		(0.9	)
Net postretirement benefit income	$	(1.2	)	$	(1.4	)	$	(2.3	)	$	(2.7	)

Missouri and Alabama state laws provide for the recovery in rates of costs accrued pursuant to GAAP provided that such costs are funded through an independent, external funding mechanism. The Utilities have established Voluntary Employees’ Beneficiary Association (VEBA) and Rabbi Trusts as external funding mechanisms. The assets of the VEBA and Rabbi Trusts consist primarily of money market securities and mutual funds invested in stocks and bonds.

Effective December 23, 2021, the $8.6 allowance for recovery in rates for Spire Missouri’s postretirement benefit plans was discontinued. The difference between no recovery in rates and pension expense as calculated pursuant to the above and that otherwise would be included in the statements of income and statements of comprehensive income is deferred as a regulatory asset or regulatory liability. Effective with the resolution of the 2022 Missouri rate case in December 2022, net liabilities for postretirement benefits will reduce rates $0.9 and $0.1 per year for Missouri East and Missouri West, respectively.

The Utilities’ funding policy is to contribute amounts to the trusts equal to the periodic benefit cost calculated pursuant to GAAP as recovered in rates. There have been no contributions to the postretirement plans through March 31, 2024 for Spire Missouri or Spire Alabama, and none are expected to be required for the remainder of the fiscal year.

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Note 10 - Information by Operating Segment

6 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Segment Reporting Disclosure [Text Block]

10. INFORMATION BY OPERATING SEGMENT

The Company has three reportable segments: Gas Utility, Gas Marketing, and Midstream. The Gas Utility segment is the aggregation of the operations of the Utilities. The Gas Marketing segment includes the results of Spire Marketing, a subsidiary engaged in the non-regulated marketing of natural gas and related activities, including utilizing natural gas storage contracts for providing natural gas sales. The Midstream segment includes Spire Storage, Spire STL Pipeline and Spire MoGas Pipeline, which are subsidiaries engaged in the storage and transportation of natural gas. Other components of the Company’s consolidated information include Spire’s subsidiaries engaged in the operation of a propane pipeline and risk management, among other activities, and unallocated corporate items, including certain debt and associated interest costs.

Accounting policies are described in Note 1, Summary of Significant Accounting Policies. Intersegment transactions include sales of natural gas from Spire Marketing to Spire Missouri, Spire Alabama and Spire Storage, storage services from Spire Storage to Spire Missouri and Spire Marketing, and natural gas transportation services provided by Spire STL Pipeline and Spire MoGas Pipeline to Spire Missouri and Spire Marketing. 

Management evaluates the performance of the operating segments based on the computation of net economic earnings. Net economic earnings exclude from reported net income the after-tax impacts of fair value accounting and timing adjustments associated with energy-related transactions, the impacts of acquisition, divestiture and restructuring activities, and the largely non-cash impacts of impairments and other non-recurring or unusual items such as certain regulatory, legislative, or GAAP standard-setting actions.

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Three Months Ended March 31, 2024
Revenues from external customers	$	1,072.4	$	46.0	$	10.0	$	0.1		$	—		$	1,128.5
Intersegment revenues		0.3		—		11.5		4.0			(15.8	)		—
Total Operating Revenues		1,072.7		46.0		21.5		4.1			(15.8	)		1,128.5
Depreciation and amortization expense		65.4		0.4		3.0		0.1			—			68.9
Interest expense		38.3		—		2.0		22.3			(10.4	)		52.2
Income tax expense (benefit)		41.7		7.6		1.5		(1.4	)		—			49.4
Net economic earnings (loss)		188.0		15.5		3.8		(10.7	)		—			196.6
Capital expenditures		137.3		—		46.0		—			(0.5	)		182.8

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Three Months Ended March 31, 2023
Revenues from external customers	$	1,054.4	$	60.6	$	8.2	$	0.2		$	—		$	1,123.4
Intersegment revenues		0.1		—		8.3		3.9			(12.3	)		—
Total Operating Revenues		1,054.5		60.6		16.5		4.1			(12.3	)		1,123.4
Depreciation and amortization expense		60.2		0.4		2.0		—			—			62.6
Interest expense		35.5		—		1.9		17.0			(7.2	)		47.2
Income tax expense (benefit)		38.9		0.8		1.5		(0.3	)		—			40.9
Net economic earnings (loss)		183.9		21.8		4.2		(10.7	)		—			199.2
Capital expenditures		143.7		—		9.3		—			—			153.0

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Six Months Ended March 31, 2024
Revenues from external customers	$	1,787.6	$	82.3	$	15.0	$	0.2		$	—		$	1,885.1
Intersegment revenues		0.3		—		21.4		8.0			(29.7	)		—
Total Operating Revenues		1,787.9		82.3		36.4		8.2			(29.7	)		1,885.1
Depreciation and amortization		129.6		0.8		5.3		0.2			—			135.9
Interest Expense		77.3		—		3.8		46.3			(24.6	)		102.8
Income tax expense (benefit)		57.4		11.4		2.1		(0.5	)		—			70.4
Net Economic Earnings (Loss)		263.8		22.7		6.2		(13.4	)		—			279.3
Capital expenditures		312.2		—		98.0		—			(0.9	)		409.3

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Six Months Ended March 31, 2023
Revenues from external customers	$	1,787.4	$	134.7	$	15.0	$	0.3		$	—		$	1,937.4
Intersegment revenues		0.1		—		16.7		7.8			(24.6	)		—
Total Operating Revenues		1,787.5		134.7		31.7		8.1			(24.6	)		1,937.4
Depreciation and amortization		119.9		0.7		3.9		0.2			—			124.7
Interest Expense		67.6		—		3.8		36.5			(17.1	)		90.8
Income tax expense (benefit)		51.3		11.3		2.9		(3.0	)		—			62.5
Net Economic Earnings (Loss)		246.8		47.5		8.0		(18.0	)		—			284.3
Capital expenditures		290.0		0.2		17.0		0.6			—			307.8

The following table reconciles the Company’s net economic earnings (loss) to net income (loss).

	Three Months Ended March 31,						Six Months Ended March 31,
	2024			2023			2024			2023
Net Income	$	204.3		$	179.2		$	289.4		$	270.2
Adjustments, pre-tax:
Fair value and timing adjustments		(10.2	)		26.6			(15.4	)		18.8
Acquisition activities		—			—			1.9			—
Income tax adjustments		2.5			(6.6	)		3.4			(4.7	)
Net Economic Earnings	$	196.6		$	199.2		$	279.3		$	284.3

The Company’s total assets by segment were as follows:

	March 31,			September 30,			March 31,
	2024			2023			2023
Total Assets:
Gas Utility	$	8,646.3		$	8,486.7		$	8,317.6
Gas Marketing		191.4			332.0			335.0
Midstream		845.2			574.3			506.2
Other		2,467.2			2,533.3			1,959.1
Eliminations		(1,438.7	)		(1,612.7	)		(1,068.9	)
Total Assets	$	10,711.4		$	10,313.6		$	10,049.0

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Note 11 - Commitments and Contingencies

6 Months Ended

Mar. 31, 2024

Notes to Financial Statements

Commitments and Contingencies Disclosure [Text Block]

11. COMMITMENTS AND CONTINGENCIES

Commitments

The Company and the Utilities have entered into contracts with various counterparties, expiring on dates through calendar 2039, for the storage, transportation, and supply of natural gas. Minimum payments required under the contracts in place at March 31, 2024, are estimated at $2,107.5, $1,553.2, and $383.9 for the Company, Spire Missouri, and Spire Alabama, respectively. Additional contracts are generally entered into prior to or during the heating season of November through April. The Utilities recover their costs from customers in accordance with their PGA clauses or GSA riders.

A consolidated subsidiary of Spire is a limited partner in Inter-Atlantic Energy Capital Ventures, L.P., an unconsolidated partnership focusing on sustainability initiatives largely tied to the natural gas utility sector. Spire committed to contribute a total of $10.0 of capital to the partnership as and when requested by the general partner. As of March 31, 2024, the remaining unfunded commitment was $4.6.

Contingencies

The Company and the Utilities account for contingencies, including environmental liabilities, in accordance with accounting standards under the loss contingency guidance of ASC Topic 450, Contingencies, when it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated.

In addition to matters noted below, the Company and the Utilities are involved in other litigation, claims, and investigations arising in the normal course of business. Management, after discussion with counsel, believes the final outcome will not have a material effect on the statements of income, balance sheets, and statements of cash flows of the Company, Spire Missouri, or Spire Alabama. However, there is uncertainty in the valuation of pending claims and prediction of litigation results.

The Company and the Utilities own and operate natural gas distribution, transmission, and storage facilities, the operations of which are subject to various environmental laws, regulations, and interpretations. While environmental issues resulting from such operations arise in the ordinary course of business, such issues have not materially affected the Company’s or Utilities’ financial position and results of operations. As environmental laws, regulations, and their interpretations change, the Company or the Utilities may incur additional environmental liabilities that may result in additional costs, which may be material.

In the natural gas industry, many gas distribution companies have incurred environmental liabilities associated with sites they or their predecessor companies formerly owned or operated where manufactured gas operations took place. The Utilities each have former manufactured gas plant (MGP) operations in their respective service territories, some of which are discussed under the Spire Missouri and Spire Alabama headings below. To the extent costs are incurred associated with environmental remediation activities, the Utilities would request authority from their respective regulators to defer such costs (less any amounts received from insurance proceeds or as contributions from other potentially responsible parties (PRPs)) and collect them through future rates.

To date, costs incurred for all Spire MGP sites for investigation, remediation and monitoring have not been material. However, the amount of costs relative to future remedial actions at these and other sites is unknown and may be material. The actual future costs that Spire Missouri and Spire Alabama may incur could be materially higher or lower depending upon several factors, including whether remediation will be required, final selection and regulatory approval of any remedial actions, changing technologies and government regulations, the ultimate ability of other PRPs to pay, and any insurance recoveries.

In 2020, Spire retained an outside consultant to conduct probabilistic cost modeling of its former MGP sites in Missouri and Alabama. The purpose of this analysis was to develop an estimated range of probabilistic future liability for each of their MGP sites. That analysis, completed in March 2021, provided a range of demonstrated possible future expenditures to investigate, monitor and remediate the former MGP sites. Spire Missouri and Spire Alabama have recorded their best estimates of the probable expenditures that relate to these matters. The amount remains immaterial, and Spire Missouri, Spire Alabama and the Company do not expect potential liabilities that may arise from remediating these sites to have a material impact on their future financial condition or results of operations.

Spire Missouri

Spire Missouri has identified three former MGP sites in the city of St. Louis, Missouri (the “City”) where costs have been incurred and claims have been asserted. Spire Missouri has enrolled two of the sites in the Missouri Department of Natural Resources (MoDNR) Brownfields/Voluntary Cleanup Program (BVCP). The third site is the result of an assertion by the United States Environmental Protection Agency (EPA).

In conjunction with redevelopment of the Carondelet Coke site, Spire Missouri and another former owner of the site entered into an agreement (the “Remediation Agreement”) with the City development agencies, the developer, and an environmental consultant that obligates one of the City agencies and the environmental consultant to remediate the site and obtain a No Further Action (NFA) letter from the MoDNR. The Remediation Agreement also provides for a release of Spire Missouri and the other former site owner from certain liabilities related to the past and current environmental condition of the site and requires the developer and the environmental consultant to maintain certain insurance coverage, including remediation cost containment, premises pollution liability, and professional liability. The operative provisions of the Remediation Agreement were triggered on December 20, 2010, on which date Spire Missouri and the other former site owner, as full consideration under the Remediation Agreement, paid a small percentage of the cost of remediation of the site. The property was divided into seven parcels, and MoDNR NFA letters have been received for six of the parcels. Remediation is ongoing on the last parcel.

In a letter dated June 29, 2011, the Attorney General for the State of Missouri informed Spire Missouri that the MoDNR had completed an investigation of the second site, Station A. The Attorney General requested that Spire Missouri participate in the follow up investigations of the site. In a letter dated January 10, 2012, Spire Missouri stated that it would participate in future environmental response activities at the site in conjunction with other PRPs. Accordingly, Spire Missouri entered into a cost sharing agreement for remedial investigation with other PRPs. MoDNR never approved the agreement, so no remedial investigation took place. Recently, Spire Missouri was approached by a real estate developer interested in purchasing the northern half of the Station A site and developing the same for industrial purposes. Consequently, Spire Missouri is now in discussions with the developer, other PRPs and MoDNR to develop a new remedial investigation plan for the site.

Additionally, in correspondence dated November 30, 2016, Region 7 of the EPA has asserted that Spire Missouri is liable under Section 107(a) of the Comprehensive Environmental Response, Compensation, and Liability Act of 1980 (CERCLA) for alleged coal gas waste contamination at a third site, Station B. Spire Missouri and the site owner notified the EPA that information and data provided by the EPA to date does not rise to the level of documenting a threat to the public health or environment. As such, in March 2017 Spire Missouri requested more information from the EPA. Spire Missouri never received a response from the EPA.

Spire Missouri has notified its insurers that it seeks reimbursement for costs incurred in the past and future potential liabilities associated with these MGP sites. While some of the insurers have denied coverage and reserved their rights, Spire Missouri retains the right to seek potential reimbursements from them.

On March 10, 2015, Spire Missouri received a Section 104(e) information request under CERCLA from EPA Region 7 regarding the former Thompson Chemical/Superior Solvents site in the City. In turn, Spire Missouri issued a Freedom of Information Act (FOIA) request to the EPA on April 3, 2015, to identify the basis of the inquiry. The FOIA response from the EPA was received on July 15, 2015, and a response was provided to the EPA on August 15, 2015. Spire Missouri has received no further inquiry from the EPA regarding this matter.

In its western service area, Spire Missouri has six owned MGP sites enrolled in the BVCP, including Joplin MGP #1, St. Joseph MGP #1, Kansas City Coal Gas Station B, Kansas City Station A Railroad area, Kansas City Coal Gas Station A, and Independence MGP #2. Source removal has been conducted at all the owned sites since 2003 with the exception of Joplin. On September 15, 2016, a request was made with the MoDNR for a restrictive covenant use limitation with respect to Joplin. Remediation efforts at the six sites are at various stages of completion, ranging from groundwater monitoring and sampling following source removal activities to the aforementioned request for the Joplin site. As part of its participation in the BVCP, Spire Missouri communicates regularly with the MoDNR with respect to its remediation efforts and monitoring activities at these sites. On May 11, 2015, MoDNR approved the next phase of investigation at the Kansas City Station A Railroad area.

Spire Alabama

Spire Alabama is in the chain of title of nine former MGP sites, four of which it still owns, and five former manufactured gas distribution sites, one of which it still owns. All are located in the state of Alabama.

In 2011, a removal action was completed and an NFA letter was received at the Huntsville MGP site pursuant to an Administrative Settlement Agreement and Order on Consent among the EPA, Spire Alabama and the current site owner.

In 2012, Spire Alabama responded to an EPA Request for Information Pursuant to Section 104 of CERCLA relating to the 35th Avenue Superfund Site located in North Birmingham, Jefferson County, Alabama. Spire Alabama was identified as a PRP under CERCLA for the cleanup of the site or costs the EPA incurs in cleaning up the site. At this point, Spire Alabama has not been provided information that would allow it to determine the extent, if any, of its potential liability with respect to the 35th Avenue Superfund Site and vigorously denies its inclusion as a PRP.

Assessments were performed by the EPA of the former MGP sites in Gadsden and Anniston, and NFA letters were received after each assessment.

Spire

In addition to those discussed above for Spire Missouri and Spire Alabama, Spire is aware of the following contingent matters.

Spire Marketing, along with many natural gas industry participants, faced the unprecedented effects of Winter Storm Uri in February 2021. Numerous natural gas producers and midstream operators were unable to deliver natural gas to market as they experienced wellhead freeze-offs, power outages and equipment failure due to the extreme weather. These events resulted in supply curtailments, and related notices of force majeure to excuse performance, from and to certain counterparties. Further, these events have made Spire Marketing subject to various commercial disputes (including regarding force majeure). As such, Spire Marketing has recorded an estimate of potential liabilities for damages based on communications with counterparties and the facts and circumstances surrounding each transaction. These estimates are adjusted as new facts emerge or settlement agreements are reached.

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Insider Trading Arrangements

3 Months Ended

6 Months Ended

Mar. 31, 2024

Mar. 31, 2024

Insider Trading Arr Line Items

Material Terms of Trading Arrangement [Text Block]

Item 5. Other Information

During the quarterly period ended March 31, 2024, no director or officer of the Company adopted or terminated any contract, instruction or written plan for the purchase or sale of securities of the Company intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) of the Exchange Act or any “non-Rule 10b5-1 trading arrangement” (as defined in the Exchange Act).

Rule 10b5-1 Arrangement Adopted [Flag]

false

Non-Rule 10b5-1 Arrangement Adopted [Flag]

false

Rule 10b5-1 Arrangement Terminated [Flag]

false

Non-Rule 10b5-1 Arrangement Terminated [Flag]

false

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Significant Accounting Policies (Policies)

6 Months Ended

Mar. 31, 2024

Accounting Policies [Abstract]

Basis of Accounting, Policy [Policy Text Block]

BASIS OF PRESENTATION – These notes are an integral part of the accompanying unaudited financial statements of Spire Inc. (“Spire” or the “Company”) presented on a consolidated basis, Spire Missouri Inc. (“Spire Missouri”) and Spire Alabama Inc. (“Spire Alabama”). Spire Missouri, Spire Alabama and Spire EnergySouth Inc. (“Spire EnergySouth”) are wholly owned subsidiaries of Spire. Spire Missouri, Spire Alabama and the subsidiaries of Spire EnergySouth (Spire Gulf Inc. and Spire Mississippi Inc.) are collectively referred to as the “Utilities.”

The accompanying unaudited financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) for interim financial information with the instructions to Form 10-Q and Rule 10-01 of Regulation S‑X. Accordingly, they do not include all the disclosures required for complete financial statements. In the opinion of management, the accompanying unaudited financial statements include all adjustments necessary for the fair presentation of the results of operations for the periods presented. This Form 10-Q should be read in conjunction with the Notes to Financial Statements contained in Spire, Spire Missouri and Spire Alabama’s combined Annual Report on Form 10-K for the fiscal year ended September 30, 2023.

The consolidated financial position, results of operations, and cash flows of Spire include the accounts of the Company and all its subsidiaries. Transactions and balances between consolidated entities have been eliminated from the consolidated financial statements of Spire. In compliance with GAAP, transactions between Spire Missouri and Spire Alabama and their affiliates, as well as intercompany balances on their balance sheets, have not been eliminated from their separate financial statements.

NATURE OF OPERATIONS – Spire has three reportable segments: Gas Utility, Gas Marketing, and Midstream. The Gas Utility segment consists of the regulated natural gas distribution operations of the Company and is the core business segment of Spire in terms of revenue and earnings. The Gas Utility segment is comprised of the operations of: Spire Missouri, serving St. Louis, Kansas City, and other areas in Missouri; Spire Alabama, serving central and northern Alabama; and the subsidiaries of Spire EnergySouth, serving the Mobile, Alabama area and south-central Mississippi. The Gas Marketing segment includes Spire’s largest gas-related business, Spire Marketing Inc. (“Spire Marketing”), which provides non-regulated natural gas services throughout the United States (U.S.). The Midstream segment includes Spire Storage, Spire STL Pipeline and Spire MoGas Pipeline, which are subsidiaries engaged in the storage and transportation of natural gas. The activities of the Company’s other subsidiaries are reported as Other and are described in Note 10, Information by Operating Segment. Spire Missouri and Spire Alabama each have a single reportable segment. 

The Company’s earnings are derived primarily from its Gas Utility segment. Due to the seasonal nature of the Utilities’ business and the volumetric Spire Missouri rate design, earnings are typically concentrated during the heating season of November through April each fiscal year. As a result, the interim statements of income for Spire, Spire Missouri and Spire Alabama are not necessarily indicative of annual results or representative of succeeding quarters of the fiscal year.

Public Utilities, Policy [Policy Text Block]

REGULATED OPERATIONS – The Utilities account for their regulated operations in accordance with Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC) Topic 980, Regulated Operations. This topic sets forth the application of GAAP for those companies whose rates are established by or are subject to approval by an independent third-party regulator. The provisions of this accounting guidance require, among other things, that financial statements of a regulated enterprise reflect the actions of regulators, where appropriate. These actions may result in the recognition of revenues and expenses in time periods that are different than non-regulated enterprises. When this occurs, costs are deferred as assets in the balance sheet (regulatory assets) and recorded as expenses when those amounts are reflected in rates. In addition, regulators can impose liabilities upon a regulated company for amounts previously collected from customers and for recovery of costs that are expected to be incurred in the future (regulatory liabilities). Management believes that the current regulatory environment supports the continued use of these regulatory accounting principles and that all regulatory assets and regulatory liabilities are recoverable or refundable through the regulatory process.

As authorized by the Missouri Public Service Commission (MoPSC), the Mississippi Public Service Commission (MSPSC) and the Alabama Public Service Commission (APSC), the Purchased Gas Adjustment (PGA) clauses and Gas Supply Adjustment (GSA) riders allow the Utilities to pass through to customers the cost of purchased gas supplies. Regulatory assets and liabilities related to the PGA clauses and the GSA riders are both labeled Unamortized Purchased Gas Adjustments herein. See additional information about regulatory assets and liabilities in Note 5, Regulatory Matters.

Derivatives, Policy [Policy Text Block]

DERIVATIVES – In the course of their business, certain subsidiaries of Spire enter into commitments associated with the purchase or sale of natural gas. Certain of their derivative natural gas contracts are designated as normal purchases or normal sales and, as such, are excluded from the scope of FASB ASC Topic 815, Derivatives and Hedging. Those contracts are accounted for as executory contracts and recorded on an accrual basis. Revenues and expenses from such contracts are recorded gross. Contracts not designated as normal purchases or normal sales are recorded as derivatives with changes in fair value recognized in earnings in the periods prior to physical delivery. Certain of Spire Marketing’s wholesale purchase and sale transactions are classified as trading activities for financial reporting purposes, with income and expenses presented on a net basis in natural gas expenses in the Condensed Consolidated Statements of Income. Spire also enters into cash flow hedges through execution of interest rate swap contracts to protect itself against adverse movements in interest rates. In the first quarter of fiscal 2024, Spire management determined it was probable the anticipated issuance of certain debt, and therefore the hedged forecasted interest payments, would not occur. The related swap was settled, hedge accounting was discontinued, and amounts previously deferred in “Accumulated other comprehensive income” were reclassified to earnings, such that the entire realized gain of $8.2 was included in “Other income” for Spire Inc. in the quarter ended December 31, 2023.

Transactions With Affiliates [Policy Text Block]

TRANSACTIONS WITH AFFILIATES – Transactions between affiliates of the Company have been eliminated from the consolidated financial statements of Spire. As reflected in their separate financial statements, Spire Missouri and Spire Alabama borrowed funds from the Company and incurred related interest. Spire Missouri and Spire Alabama also participated in normal intercompany shared services transactions. Spire Missouri’s and Spire Alabama’s other transactions with affiliates are presented below:

	Three Months Ended March 31,				Six Months Ended March 31,
	2024		2023		2024		2023
Spire Missouri
Purchases of natural gas from Spire Marketing	$	5.6	$	13.8	$	10.6	$	42.3
Transportation services received from Spire STL Pipeline		8.3		7.8		16.5		15.9
Transportation services received from Spire MoGas Pipeline		1.4		—		1.4		—
Sales of natural gas to Spire Marketing		0.3		0.1		0.3		0.1
Natural gas storage services from Spire Storage Salt Plains LLC		0.4		—		0.7		—
Spire Alabama
Purchases of natural gas from Spire Marketing	$	—	$	—	$	3.4	$	1.1

Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]

RESTRICTED CASH AND OTHER INVESTMENTS – In Spire’s statement of cash flows for the period ended March 31, 2024, total Cash, Cash Equivalents, and Restricted Cash included $20.8, $20.2 and $14.3 of restricted cash reported in “Other Investments” on the Company’s balance sheet as of March 31, 2024,  September 30, 2023, and March 31, 2023, respectively (in addition to amounts shown as “Cash and cash equivalents”). This restricted cash has been segregated and invested in debt securities in a trust account based on collateral requirements for reinsurance at Spire’s risk management company.

Business Combinations Policy [Policy Text Block]

BUSINESS COMBINATIONS – On January 19, 2024, a subsidiary in Spire’s Midstream segment acquired MoGas Pipeline, an interstate natural gas pipeline, and Omega Pipeline, a connected gas distribution system in Missouri, to better serve customers in Missouri. MoGas interconnects with Spire STL Pipeline and other regional pipelines to deliver gas to Spire Missouri’s growing customer base in St. Charles, Franklin, and western St. Louis counties, among other utility, municipal, industrial and commercial customers. Omega owns and operates an approximately 75-mile natural gas distribution system within Fort Leonard Wood in south-central Missouri and is interconnected with the MoGas system. The acquisition was accounted for as a business combination in accordance with ASC 805, Business Combinations. The $177.6 preliminary cash consideration transferred is subject to further working capital adjustments as provided in the purchase agreement. This preliminary purchase price was allocated entirely to property, plant and equipment based on their estimated fair value at the acquisition date and recorded as non-utility property in the consolidated balance sheet. The operating revenues and operating income of MoGas and Omega were not material to our consolidated results for the three and six months ended March 31, 2024.

Accrued Capital Expenditures [Policy Text Block]

ACCRUED CAPITAL EXPENDITURES – Accrued capital expenditures, shown in the following table, are excluded from capital expenditures in the statements of cash flows until paid.

	March 31,		September 30,		March 31,
	2024		2023		2023
Spire	$	80.4	$	104.3	$	66.3
Spire Missouri		47.2		56.5		35.4
Spire Alabama		2.7		4.6		5.2

Receivable [Policy Text Block]

ACCOUNTS RECEIVABLE AND ALLOWANCE FOR CREDIT LOSSES – Trade accounts receivable are recorded at the amounts due from customers, including unbilled amounts. Accounts receivable are written off when they are deemed to be uncollectible. An allowance for expected credit losses is estimated and updated based on relevant data and trends such as accounts receivable aging, historical write-off experience, current write-off trends, economic conditions, and the impact of weather and availability of customer payment assistance on collection trends. For the Utilities, net write-offs as a percentage of revenue has historically been the best predictor of base net write-off experience over time. Management judgment is applied in the development of the allowance due to the complexity of variables and subjective nature of certain relevant factors. The accounts receivable of Spire’s non-utility businesses are evaluated separately from those of the Utilities. The allowance for credit losses for those other businesses is based on a continuous evaluation of the individual counterparty risk and is not significant for the periods presented. Activity in the allowance for credit losses is shown in the following table.

	Spire						Spire Missouri						Spire Alabama
Three Months Ended March 31,	2024			2023			2024			2023			2024			2023
Allowance at beginning of period	$	35.4		$	34.5		$	28.9		$	28.2		$	5.7		$	5.5
Provision for expected credit losses		7.9			8.2			6.2			7.3			1.4			0.5
Write-offs, net of recoveries		(4.2	)		(2.1	)		(3.1	)		(1.0	)		(0.9	)		(0.7	)
Allowance at end of period	$	39.1		$	40.6		$	32.0		$	34.5		$	6.2		$	5.3
Six Months Ended March 31,	2024			2023			2024			2023			2024			2023
Allowance at beginning of period	$	32.5		$	31.9		$	26.2		$	24.9		$	5.7		$	6.3
Provision for expected credit losses		12.0			12.3			9.8			11.1			1.7			0.7
Write-offs, net of recoveries		(5.4	)		(3.6	)		(4.0	)		(1.5	)		(1.2	)		(1.7	)
Allowance at end of period	$	39.1		$	40.6		$	32.0		$	34.5		$	6.2		$	5.3

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Note 1 - Summary of Significant Accounting Policies (Tables)

6 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Related Party Transactions [Table Text Block]

	Three Months Ended March 31,				Six Months Ended March 31,
	2024		2023		2024		2023
Spire Missouri
Purchases of natural gas from Spire Marketing	$	5.6	$	13.8	$	10.6	$	42.3
Transportation services received from Spire STL Pipeline		8.3		7.8		16.5		15.9
Transportation services received from Spire MoGas Pipeline		1.4		—		1.4		—
Sales of natural gas to Spire Marketing		0.3		0.1		0.3		0.1
Natural gas storage services from Spire Storage Salt Plains LLC		0.4		—		0.7		—
Spire Alabama
Purchases of natural gas from Spire Marketing	$	—	$	—	$	3.4	$	1.1

Schedule Of Capital Expenditure Excluded From Statement Of Cash Flow [Table Text Block]

	March 31,		September 30,		March 31,
	2024		2023		2023
Spire	$	80.4	$	104.3	$	66.3
Spire Missouri		47.2		56.5		35.4
Spire Alabama		2.7		4.6		5.2

Accounts Receivable, Allowance for Credit Loss [Table Text Block]

	Spire						Spire Missouri						Spire Alabama
Three Months Ended March 31,	2024			2023			2024			2023			2024			2023
Allowance at beginning of period	$	35.4		$	34.5		$	28.9		$	28.2		$	5.7		$	5.5
Provision for expected credit losses		7.9			8.2			6.2			7.3			1.4			0.5
Write-offs, net of recoveries		(4.2	)		(2.1	)		(3.1	)		(1.0	)		(0.9	)		(0.7	)
Allowance at end of period	$	39.1		$	40.6		$	32.0		$	34.5		$	6.2		$	5.3
Six Months Ended March 31,	2024			2023			2024			2023			2024			2023
Allowance at beginning of period	$	32.5		$	31.9		$	26.2		$	24.9		$	5.7		$	6.3
Provision for expected credit losses		12.0			12.3			9.8			11.1			1.7			0.7
Write-offs, net of recoveries		(5.4	)		(3.6	)		(4.0	)		(1.5	)		(1.2	)		(1.7	)
Allowance at end of period	$	39.1		$	40.6		$	32.0		$	34.5		$	6.2		$	5.3

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Note 2 - Revenue (Tables)

6 Months Ended

Mar. 31, 2024

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended March 31,						Six Months Ended March 31,
	2024			2023			2024			2023
Spire
Gas Utility:
Residential	$	729.5		$	730.2		$	1,222.3		$	1,248.2
Commercial and industrial		267.9			260.3			425.8			430.9
Transportation		36.8			33.3			69.4			64.2
Off-system and other incentive		13.0			6.1			19.4			13.7
Other customer revenue		8.2			4.3			13.7			8.7
Total revenue from contracts with customers		1,055.4			1,034.2			1,750.6			1,765.7
Changes in accrued revenue under alternative revenue programs	17.3				20.3			37.3			21.8
Total Gas Utility operating revenues		1,072.7			1,054.5			1,787.9			1,787.5
Gas Marketing		46.0			60.6			82.3			134.7
Midstream		21.5			16.5			36.4			31.7
Other		4.1			4.1			8.2			8.1
Total before eliminations		1,144.3			1,135.7			1,914.8			1,962.0
Intersegment eliminations (see Note 10, Information by Operating Segment)		(15.8	)		(12.3	)		(29.7	)		(24.6	)
Total Operating Revenues	$	1,128.5		$	1,123.4		$	1,885.1		$	1,937.4

Spire Missouri
Residential	$	532.9	$	570.0	$	921.7	$	970.6
Commercial and industrial		185.7		185.2		295.9		308.1
Transportation		10.1		9.9		19.1		19.0
Off-system and other incentive		12.3		4.5		16.4		9.6
Other customer revenue		5.0		4.3		7.5		6.3
Total revenue from contracts with customers		746.0		773.9		1,260.6		1,313.6
Changes in accrued revenue under alternative revenue programs	20.5			17.1		41.3		18.6
Total Operating Revenues	$	766.5	$	791.0	$	1,301.9	$	1,332.2

Spire Alabama
Residential	$	169.3		$	135.1		$	253.7		$	231.4
Commercial and industrial		68.8			61.5			103.5			95.1
Transportation	24.0			20.8			44.8				40.1
Off-system and other incentive		0.7			1.7			3.0			4.1
Other customer revenue		0.7			0.7			1.6			1.9
Total revenue from contracts with customers		263.5			219.8			406.6			372.6
Changes in accrued revenue under alternative revenue programs		(4.0	)		(1.5	)		(5.0	)		(1.9	)
Total Operating Revenues	$	259.5		$	218.3		$	401.6		$	370.7

Schedule Of Taxes On Revenues [Table Text Block]

	Three Months Ended March 31,				Six Months Ended March 31,
	2024		2023		2024		2023
Spire	$	60.0	$	60.2	$	91.1	$	90.6
Spire Missouri		44.0		45.6		66.5		67.7
Spire Alabama		14.1		12.6		21.0		19.4

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Note 3 - Earnings Per Common Share (Tables)

6 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Earnings Per Share, Basic and Diluted [Table Text Block]

	Three Months Ended March 31,				Six Months Ended March 31,
	2024		2023		2024		2023
Basic Earnings Per Common Share:
Net Income	$	204.3	$	179.2	$	289.4	$	270.2
Less: Provision for preferred dividends		3.7		3.7		7.4		7.4
Income allocated to participating securities		0.3		0.4		0.4		0.5
Income Available to Common Shareholders	$	200.3	$	175.1	$	281.6	$	262.3
Weighted Average Common Shares Outstanding (in millions)		55.8		52.5		54.6		52.5
Basic Earnings Per Common Share	$	3.59	$	3.33	$	5.16	$	5.00
Diluted Earnings Per Common Share:
Net Income	$	204.3	$	179.2	$	289.4	$	270.2
Less: Provision for preferred dividends		3.7		3.7		7.4		7.4
Income allocated to participating securities		0.3		0.4		0.4		0.5
Income Available to Common Shareholders	$	200.3	$	175.1	$	281.6	$	262.3
Weighted Average Common Shares Outstanding (in millions)		55.8		52.5		54.6		52.5
Dilutive Effect of forward sales of common stock, restricted stock and restricted stock units (in millions)*		0.1		0.1		0.1		0.1
Weighted Average Diluted Common Shares (in millions)		55.9		52.6		54.7		52.6
Diluted Earnings Per Common Share	$	3.58	$	3.33	$	5.14	$	4.99
* Calculation excludes certain outstanding or potential common shares (shown in millions by period at the right) attributable to (1) forward sales of common stock, (2) stock units subject to performance or market conditions and (3) restricted stock, which could have a dilutive effect in the future		0.4		0.5		0.3		0.4

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Note 5 - Regulatory Matters (Tables)

6 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Regulatory Assets and Liabilities [Table Text Block]

	March 31,		September 30,		March 31,
Spire	2024		2023		2023
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	81.4	$	293.2	$	115.3
Other		35.5		55.1		27.7
Total Current Regulatory Assets		116.9		348.3		143.0
Noncurrent:
Pension and postretirement benefit costs		251.4		261.0		273.1
Cost of removal		649.2		633.2		516.4
Future income taxes due from customers		146.6		144.5		139.3
Energy efficiency		58.2		56.3		59.4
Unamortized purchased gas adjustments		—		23.0		181.3
Other		167.3		131.2		147.2
Total Noncurrent Regulatory Assets		1,272.7		1,249.2		1,316.7
Total Regulatory Assets	$	1,389.6	$	1,597.5	$	1,459.7
Regulatory Liabilities:
Current:
Unamortized purchased gas adjustments	$	19.8	$	—	$	—
Other		5.3		7.3		5.3
Total Current Regulatory Liabilities		25.1		7.3		5.3
Noncurrent:
Deferred taxes due to customers		120.9		128.0		135.8
Pension and postretirement benefit costs		192.6		185.2		161.0
Accrued cost of removal		133.5		126.6		34.6
Unamortized purchased gas adjustments		90.8		11.2		—
Other		19.9		21.4		28.9
Total Noncurrent Regulatory Liabilities		557.7		472.4		360.3
Total Regulatory Liabilities	$	582.8	$	479.7	$	365.6

	March 31,		September 30,		March 31,
Spire Missouri	2024		2023		2023
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	81.0	$	269.4	$	58.7
Other		8.2		23.7		4.0
Total Current Regulatory Assets		89.2		293.1		62.7
Noncurrent:
Future income taxes due from customers		138.5		136.2		130.9
Pension and postretirement benefit costs		183.6		189.1		195.5
Energy efficiency		58.2		56.3		59.4
Unamortized purchased gas adjustments		—		23.0		181.3
Cost of removal		97.0		97.0		24.2
Other		153.2		116.0		130.7
Total Noncurrent Regulatory Assets		630.5		617.6		722.0
Total Regulatory Assets	$	719.7	$	910.7	$	784.7
Regulatory Liabilities:
Noncurrent:
Deferred taxes due to customers	$	108.3	$	114.8	$	121.3
Pension and postretirement benefit costs		165.4		156.5		132.7
Accrued cost of removal		95.8		90.4		—
Unamortized purchased gas adjustments		90.8		11.2		—
Other		15.0		16.5		22.9
Total Noncurrent Regulatory Liabilities		475.3		389.4		276.9
Total Regulatory Liabilities	$	475.3	$	389.4	$	276.9

	March 31,		September 30,		March 31,
Spire Alabama	2024		2023		2023
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	—	$	21.7	$	53.6
Other		14.9		19.9		11.2
Total Current Regulatory Assets		14.9		41.6		64.8
Noncurrent:
Future income taxes due from customers		1.9		2.0		2.0
Pension and postretirement benefit costs		64.2		67.8		73.1
Cost of removal		552.2		536.2		492.2
Other		0.8		0.9		1.0
Total Noncurrent Regulatory Assets		619.1		606.9		568.3
Total Regulatory Assets	$	634.0	$	648.5	$	633.1
Regulatory Liabilities:
Current:
Unamortized purchased gas adjustments	$	18.7	$	—	$	—
Total Current Regulatory Liabilities		18.7		—		—
Noncurrent:
Pension and postretirement benefit costs		16.8		17.9		18.0
Other		3.3		3.3		3.5
Total Noncurrent Regulatory Liabilities		20.1		21.2		21.5
Total Regulatory Liabilities	$	38.8	$	21.2	$	21.5

Schedule of Regulatory Assets Not Earning Return [Table Text Block]

	March 31,		September 30,		March 31,
	2024		2023		2023
Spire
Pension and postretirement benefit costs	$	133.8	$	133.4	$	127.8
Future income taxes due from customers		144.7		142.5		137.2
Unamortized purchased gas adjustments		81.0		292.4		240.0
Other		127.7		104.2		102.4
Total Regulatory Assets Not Earning a Return	$	487.2	$	672.5	$	607.4
Spire Missouri
Pension and postretirement benefit costs	$	133.8	$	133.4	$	127.8
Future income taxes due from customers		138.5		136.2		130.9
Unamortized purchased gas adjustments		81.0		292.4		240.0
Other		127.7		104.2		102.4
Total Regulatory Assets Not Earning a Return	$	481.0	$	666.2	$	601.1

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Note 6 - Financing (Tables)

6 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Short-Term Debt [Table Text Block]

	Spire (Parent Only)			Spire Missouri						Spire Alabama			Spire
	CP			Term			Spire			Spire			Consol-
	Program			Loan			Note			Note			idated
Six Months Ended March 31, 2024
Highest borrowings outstanding	$	1,135.0		$	200.0		$	643.6		$	132.5		$	1,275.0
Lowest borrowings outstanding		554.6			—			234.7			25.2			754.6
Weighted average borrowings		930.6			97.3			469.9			94.5			1,027.9
Weighted average interest rate		5.7	%		6.7	%		5.7	%		5.7	%		5.8	%
As of March 31, 2024
Borrowings outstanding	$	586.0		$	200.0		$	243.9		$	37.4		$	786.0
Weighted average interest rate		5.6	%		6.3	%		5.6	%		5.6	%		5.8	%
As of September 30, 2023
Borrowings outstanding	$	955.5		$	—		$	540.6		$	124.1		$	955.5
Weighted average interest rate		5.6	%		n/a			5.6	%		5.6	%		5.6	%
As of March 31, 2023
Borrowings outstanding	$	361.0		$	200.0		$	60.7		$	121.3		$	561.0
Weighted average interest rate		5.3	%		5.6	%		5.3	%		5.3	%		5.4	%

Summary Of Capitalized Interest [Table Text Block]

	Three Months Ended March 31,				Six Months Ended March 31,
	2024		2023		2024		2023
Spire	$	4.0	$	1.9	$	7.8	$	3.5
Spire Missouri		1.1		0.6		2.3		1.1
Spire Alabama		0.4		0.6		0.8		1.3

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Note 7 - Fair Value of Financial Instruments (Tables)

6 Months Ended

Mar. 31, 2024

Notes Tables

Fair Value, by Balance Sheet Grouping [Table Text Block]

					Classification of Estimated Fair Value
	Carrying Amount		Fair Value		Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)
Spire
As of March 31, 2024
Cash and cash equivalents	$	25.6	$	25.6	$	25.6	$	—
Notes payable		786.0		786.0		—		786.0
Long-term debt, including current portion		3,728.4		3,452.0		—		3,452.0
As of September 30, 2023
Cash and cash equivalents	$	5.6	$	5.6	$	5.6	$	—
Notes payable		955.5		955.5		—		955.5
Long-term debt, including current portion		3,710.6		3,270.2		—		3,270.2
As of March 31, 2023
Cash and cash equivalents	$	6.9	$	6.9	$	6.9	$	—
Notes payable		561.0		561.0		—		561.0
Long-term debt, including current portion		3,959.1		3,704.2		—		3,704.2
Spire Missouri
As of March 31, 2024
Notes payable	$	200.0	$	200.0	$	—	$	200.0
Notes payable – associated companies		243.9		243.9		—		243.9
Long-term debt, including current portion		1,786.2		1,649.4		—		1,649.4
As of September 30, 2023
Cash and cash equivalents	$	0.8	$	0.8	$	0.8	$	—
Notes payable – associated companies		540.6		540.6		—		540.6
Long-term debt		1,785.4		1,592.4		—		1,592.4
As of March 31, 2023
Notes payable	$	200.0	$	200.0	$	—	$	200.0
Notes payable – associated companies		60.7		60.7		—		60.7
Long-term debt, including current portion		2,034.5		1,930.2		—		1,930.2
Spire Alabama
As of March 31, 2024
Cash and cash equivalents	$	1.8	$	1.8	$	1.8	$	—
Notes payable – associated companies		37.4		37.4		—		37.4
Long-term debt		746.1		685.3		—		685.3
As of September 30, 2023
Cash and cash equivalents	$	1.2	$	1.2	$	1.2	$	—
Notes payable – associated companies		124.1		124.1		—		124.1
Long-term debt		745.9		648.0		—		648.0
As of March 31, 2023
Cash and cash equivalents	$	1.0	$	1.0	$	1.0	$	—
Notes payable – associated companies		121.3		121.3		—		121.3
Long-term debt		745.7		696.6		—		696.6

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Note 8 - Fair Value Measurements (Tables)

6 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]

	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Effects of Netting and Cash Margin Receivables /Payables			Total
As of March 31, 2024
ASSETS
Gas Utility:
U.S. stock/bond mutual funds	$	22.6	$	—	$	—		$	22.6
NYMEX/ICE natural gas contracts		3.7		—		(3.7	)		—
Gasoline and heating oil contracts		—		0.1		(0.1	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		8.6		—		(8.6	)		—
Natural gas commodity contracts		—		62.2		(2.6	)		59.6
Other:
U.S. stock/bond mutual funds		16.6		—		—			16.6
U.S. bonds		17.1		—		—			17.1
Global bonds		1.4		—		—			1.4
Interest rate swaps		—		29.0		—			29.0
Total	$	70.0	$	91.3	$	(15.0	)	$	146.3
LIABILITIES
Gas Utility:
NYMEX/ICE natural gas contracts	$	35.7	$	—	$	(35.7	)	$	—
Gas Marketing:
NYMEX/ICE natural gas contracts		30.7		—		(30.7	)		—
Natural gas commodity contracts		—		25.3		(2.6	)		22.7
Total	$	66.4	$	25.3	$	(69.0	)	$	22.7

	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Effects of Netting and Cash Margin Receivables /Payables			Total
As of September 30, 2023
ASSETS
Gas Utility:
U.S. stock/bond mutual funds	$	20.4	$	—	$	—		$	20.4
NYMEX/ICE natural gas contracts		6.3		—		(6.3	)		—
Gasoline and heating oil contracts		—		0.1		(0.1	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		10.1		—		(10.1	)		—
Natural gas commodity contracts		—		36.7		(3.6	)		33.1
Other:
U.S. stock/bond mutual funds		37.6		—		—			37.6
Interest rate swaps		—		44.2		—			44.2
Total	$	74.4	$	81.0	$	(20.1	)	$	135.3
LIABILITIES
Gas Utility:
NYMEX/ICE natural gas contracts	$	50.8	$	—	$	(44.0	)	$	6.8
Gas Marketing:
NYMEX/ICE natural gas contracts		21.8		—		(21.8	)		—
Natural gas commodity contracts		—		27.6		(3.6	)		24.0
Total	$	72.6	$	27.6	$	(69.4	)	$	30.8
As of March 31, 2023
ASSETS
Gas Utility:
U.S. stock/bond mutual funds	$	20.7	$	—	$	—		$	20.7
NYMEX/ICE natural gas contracts		0.1		—		(0.1	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		31.9		—		(31.9	)		—
Natural gas commodity contracts *		—		39.2		(1.3	)		37.9
Other:
U.S. stock/bond mutual funds		29.2		—		—			29.2
Interest rate swaps *		—		16.5		—			16.5
Total	$	81.9	$	55.7	$	(33.3	)	$	104.3
LIABILITIES
Gas Utility:
NYMEX/ICE natural gas contracts	$	62.7	$	—	$	(62.7	)	$	—
Gasoline and heating oil contracts		0.5		—		(0.5	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		48.1		—		(48.1	)		—
Natural gas commodity contracts *		—		32.4		(1.3	)		31.1
Other:
Interest rate swaps *		—		2.2		—			2.2
Total	$	111.3	$	34.6	$	(112.6	)	$	33.3

	Quoted Prices in Active Markets (Level 1)		Significant Observable Inputs (Level 2)		Effects of Netting and Cash Margin Receivables /Payables			Total
As of March 31, 2024
ASSETS
U.S. stock/bond mutual funds	$	22.6	$	—	$	—		$	22.6
NYMEX/ICE natural gas contracts		3.7		—		(3.7	)		—
Gasoline and heating oil contracts		—		0.1		(0.1	)		—
Total	$	26.3	$	0.1	$	(3.8	)	$	22.6
LIABILITIES
NYMEX/ICE natural gas contracts	$	35.7	$	—	$	(35.7	)	$	—
As of September 30, 2023
ASSETS
U.S. stock/bond mutual funds	$	20.4	$	—	$	—		$	20.4
NYMEX/ICE natural gas contracts		6.3		—		(6.3	)		—
Gasoline and heating oil contracts		—		0.1		(0.1	)		—
Total	$	26.7	$	0.1	$	(6.4	)	$	20.4
LIABILITIES
NYMEX/ICE natural gas contracts	$	50.8	$	—	$	(44.0	)	$	6.8
As of March 31, 2023
ASSETS
U.S. stock/bond mutual funds	$	20.7	$	—	$	—		$	20.7
NYMEX/ICE natural gas contracts		0.1		—		(0.1	)		—
Total	$	20.8	$	—	$	(0.1	)	$	20.7
LIABILITIES
NYMEX/ICE natural gas contracts	$	62.7	$	—	$	(62.7	)	$	—
Gasoline and heating oil contracts		0.5		—		(0.5	)		—
Total	$	63.2	$	—	$	(63.2	)	$	—

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Note 9 - Pension Plans and Other Postretirement Benefits (Tables)

6 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended March 31,						Six Months Ended March 31,
	2024			2023			2024			2023
Spire
Service cost – benefits earned during the period	$	3.9		$	3.9		$	7.9		$	8.0
Interest cost on projected benefit obligation		6.6			5.9			13.4			12.3
Expected return on plan assets		(6.1	)		(5.7	)		(12.4	)		(12.1	)
Amortization of prior service credit		(1.2	)		(1.2	)		(2.3	)		(2.3	)
Amortization of actuarial loss		1.6			1.6			3.2			3.2
Loss on lump-sum settlements		—			—			—			8.6
Subtotal		4.8			4.5			9.8			17.7
Regulatory adjustment		8.8			10.4			17.5			12.2
Net pension cost	$	13.6		$	14.9		$	27.3		$	29.9
Spire Missouri
Service cost – benefits earned during the period	$	2.6		$	2.9		$	5.2		$	5.7
Interest cost on projected benefit obligation		4.7			4.4			9.5			8.9
Expected return on plan assets		(4.2	)		(4.5	)		(8.5	)		(9.0	)
Amortization of prior service credit		(0.5	)		(0.5	)		(1.0	)		(1.0	)
Amortization of actuarial loss		1.4			1.6			2.9			3.1
Subtotal		4.0			3.9			8.1			7.7
Regulatory adjustment		6.3			8.1			12.6			16.2
Net pension cost	$	10.3		$	12.0		$	20.7		$	23.9
Spire Alabama
Service cost – benefits earned during the period	$	1.1		$	0.8		$	2.3		$	1.9
Interest cost on projected benefit obligation		1.2			0.8			2.5			2.1
Expected return on plan assets		(1.2	)		(0.5	)		(2.4	)		(1.6	)
Amortization of prior service credit		(0.6	)		(0.6	)		(1.2	)		(1.2	)
Amortization of actuarial loss		0.3			0.2			0.5			0.3
Loss on lump-sum settlements		—			—			—			8.6
Subtotal		0.8			0.7			1.7			10.1
Regulatory adjustment		2.3			2.1			4.5			(4.4	)
Net pension cost	$	3.1		$	2.8		$	6.2		$	5.7

	Three Months Ended March 31,						Six Months Ended March 31,
	2024			2023			2024			2023
Spire
Service cost – benefits earned during the period	$	1.0		$	1.2		$	2.1		$	2.4
Interest cost on accumulated postretirement benefit obligation		2.4			2.2			4.5			4.3
Expected return on plan assets		(4.2	)		(3.9	)		(8.2	)		(7.8	)
Amortization of prior service cost		0.1			—			0.2			0.1
Amortization of actuarial gain		(1.1	)		(1.1	)		(2.1	)		(2.1	)
Subtotal		(1.8	)		(1.6	)		(3.5	)		(3.1	)
Regulatory adjustment		0.3			0.2			0.5			0.3
Net postretirement benefit income	$	(1.5	)	$	(1.4	)	$	(3.0	)	$	(2.8	)
Spire Missouri
Service cost – benefits earned during the period	$	0.9		$	1.0		$	1.8		$	2.0
Interest cost on accumulated postretirement benefit obligation		1.7			1.7			3.3			3.3
Expected return on plan assets		(2.7	)		(2.7	)		(5.4	)		(5.3	)
Amortization of prior service cost		0.1			0.1			0.3			0.3
Amortization of actuarial gain		(0.9	)		(0.8	)		(1.8	)		(1.6	)
Subtotal		(0.9	)		(0.7	)		(1.8	)		(1.3	)
Regulatory adjustment		0.7			0.7			1.3			1.3
Net postretirement benefit income	$	(0.2	)	$	—		$	(0.5	)	$	—
Spire Alabama
Service cost – benefits earned during the period	$	0.1		$	0.1		$	0.3		$	0.3
Interest cost on accumulated postretirement benefit obligation		0.6			0.5			1.1			0.9
Expected return on plan assets		(1.3	)		(1.3	)		(2.6	)		(2.5	)
Amortization of prior service credit		—			(0.1	)		(0.1	)		(0.2	)
Amortization of actuarial gain		(0.1	)		(0.2	)		(0.1	)		(0.3	)
Subtotal		(0.7	)		(1.0	)		(1.4	)		(1.8	)
Regulatory adjustment		(0.5	)		(0.4	)		(0.9	)		(0.9	)
Net postretirement benefit income	$	(1.2	)	$	(1.4	)	$	(2.3	)	$	(2.7	)

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Note 10 - Information by Operating Segment (Tables)

6 Months Ended

Mar. 31, 2024

Notes Tables

Schedule of Segment Reporting Information, by Segment [Table Text Block]

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Three Months Ended March 31, 2024
Revenues from external customers	$	1,072.4	$	46.0	$	10.0	$	0.1		$	—		$	1,128.5
Intersegment revenues		0.3		—		11.5		4.0			(15.8	)		—
Total Operating Revenues		1,072.7		46.0		21.5		4.1			(15.8	)		1,128.5
Depreciation and amortization expense		65.4		0.4		3.0		0.1			—			68.9
Interest expense		38.3		—		2.0		22.3			(10.4	)		52.2
Income tax expense (benefit)		41.7		7.6		1.5		(1.4	)		—			49.4
Net economic earnings (loss)		188.0		15.5		3.8		(10.7	)		—			196.6
Capital expenditures		137.3		—		46.0		—			(0.5	)		182.8

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Three Months Ended March 31, 2023
Revenues from external customers	$	1,054.4	$	60.6	$	8.2	$	0.2		$	—		$	1,123.4
Intersegment revenues		0.1		—		8.3		3.9			(12.3	)		—
Total Operating Revenues		1,054.5		60.6		16.5		4.1			(12.3	)		1,123.4
Depreciation and amortization expense		60.2		0.4		2.0		—			—			62.6
Interest expense		35.5		—		1.9		17.0			(7.2	)		47.2
Income tax expense (benefit)		38.9		0.8		1.5		(0.3	)		—			40.9
Net economic earnings (loss)		183.9		21.8		4.2		(10.7	)		—			199.2
Capital expenditures		143.7		—		9.3		—			—			153.0

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Six Months Ended March 31, 2024
Revenues from external customers	$	1,787.6	$	82.3	$	15.0	$	0.2		$	—		$	1,885.1
Intersegment revenues		0.3		—		21.4		8.0			(29.7	)		—
Total Operating Revenues		1,787.9		82.3		36.4		8.2			(29.7	)		1,885.1
Depreciation and amortization		129.6		0.8		5.3		0.2			—			135.9
Interest Expense		77.3		—		3.8		46.3			(24.6	)		102.8
Income tax expense (benefit)		57.4		11.4		2.1		(0.5	)		—			70.4
Net Economic Earnings (Loss)		263.8		22.7		6.2		(13.4	)		—			279.3
Capital expenditures		312.2		—		98.0		—			(0.9	)		409.3

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Six Months Ended March 31, 2023
Revenues from external customers	$	1,787.4	$	134.7	$	15.0	$	0.3		$	—		$	1,937.4
Intersegment revenues		0.1		—		16.7		7.8			(24.6	)		—
Total Operating Revenues		1,787.5		134.7		31.7		8.1			(24.6	)		1,937.4
Depreciation and amortization		119.9		0.7		3.9		0.2			—			124.7
Interest Expense		67.6		—		3.8		36.5			(17.1	)		90.8
Income tax expense (benefit)		51.3		11.3		2.9		(3.0	)		—			62.5
Net Economic Earnings (Loss)		246.8		47.5		8.0		(18.0	)		—			284.3
Capital expenditures		290.0		0.2		17.0		0.6			—			307.8

Reconciliation Of Consolidated Net Economic Earnings To Consolidated Net Income [Table Text Block]

	Three Months Ended March 31,						Six Months Ended March 31,
	2024			2023			2024			2023
Net Income	$	204.3		$	179.2		$	289.4		$	270.2
Adjustments, pre-tax:
Fair value and timing adjustments		(10.2	)		26.6			(15.4	)		18.8
Acquisition activities		—			—			1.9			—
Income tax adjustments		2.5			(6.6	)		3.4			(4.7	)
Net Economic Earnings	$	196.6		$	199.2		$	279.3		$	284.3

Reconciliation of Assets from Segment to Consolidated [Table Text Block]

	March 31,			September 30,			March 31,
	2024			2023			2023
Total Assets:
Gas Utility	$	8,646.3		$	8,486.7		$	8,317.6
Gas Marketing		191.4			332.0			335.0
Midstream		845.2			574.3			506.2
Other		2,467.2			2,533.3			1,959.1
Eliminations		(1,438.7	)		(1,612.7	)		(1,068.9	)
Total Assets	$	10,711.4		$	10,313.6		$	10,049.0

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Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Millions		3 Months Ended	6 Months Ended
	Jan. 19, 2024 USD ($)	Dec. 31, 2023 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2023 USD ($)
Number of Reportable Segments			3
Restricted Cash			$ 20.8	$ 14.3	$ 20.2
Payments to Acquire Businesses, Gross			$ 177.4	$ 37.1
MoGas Pipeline [Member]
Payments to Acquire Businesses, Gross	$ 177.6
Other Income [Member]
Gain on Discontinuation of Cash Flow Hedge Due to Forecasted Transaction Probable of Not Occurring		$ 8.2

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Note 1 - Summary of Significant Accounting Policies - Transactions with Affiliates (Details) - Affiliated Entity [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Regulated Operation [Member] | Spire Marketing [Member] | Spire Missouri [Member]
Purchases of natural gas from Spire Marketing	$ 5.6	$ 13.8	$ 10.6	$ 42.3
Transaction amount	0.3	0.1	0.3	0.1
Regulated Operation [Member] | Spire Marketing [Member] | Spire Alabama Inc [Member]
Purchases of natural gas from Spire Marketing	0.0	0.0	3.4	1.1
Unregulated Operation [Member] | Spire S T L Pipeline L L C [Member] | Spire Missouri [Member]
Transaction amount	8.3	7.8	16.5	15.9
Unregulated Operation [Member] | Spire MoGas Pipeline [Member] | Spire Missouri [Member]
Transaction amount	1.4	0.0	1.4	0.0
Unregulated Operation [Member] | Spire Storage Salt Plains LLC [Member] | Spire Missouri [Member]
Transaction amount	$ 0.4	$ 0.0	$ 0.7	$ 0.0

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Note 1 - Summary of Significant Accounting Policies - Accrued Capital Expenditures Excluded from Capital Expenditures in the Statements of Cash Flows (Details) - USD ($) $ in Millions	6 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Sep. 30, 2023
Accrued capital expenditures	$ 80.4	$ 66.3	$ 104.3
Spire Missouri [Member]
Accrued capital expenditures	47.2	35.4	56.5
Spire Alabama Inc [Member]
Accrued capital expenditures	$ 2.7	$ 5.2	$ 4.6

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Note 1 - Summary of Significant Accounting Policies - Activity in the Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Allowance at beginning of period	$ 35.4	$ 34.5	$ 32.5	$ 31.9
Provision for expected credit losses	7.9	8.2	12.0	12.3
Write-offs, net of recoveries	(4.2)	(2.1)	(5.4)	(3.6)
Allowance at end of period	39.1	40.6	39.1	40.6
Spire Missouri [Member]
Allowance at beginning of period	28.9	28.2	26.2	24.9
Provision for expected credit losses	6.2	7.3	9.8	11.1
Write-offs, net of recoveries	(3.1)	(1.0)	(4.0)	(1.5)
Allowance at end of period	32.0	34.5	32.0	34.5
Spire Alabama Inc [Member]
Allowance at beginning of period	5.7	5.5	5.7	6.3
Provision for expected credit losses	1.4	0.5	1.7	0.7
Write-offs, net of recoveries	(0.9)	(0.7)	(1.2)	(1.7)
Allowance at end of period	$ 6.2	$ 5.3	$ 6.2	$ 5.3

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Note 2 - Revenue - Disaggregated of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Operating Revenues	$ 1,128.5	$ 1,123.4	$ 1,885.1	$ 1,937.4
Consolidation, Eliminations [Member]
Operating Revenues	(15.8)	(12.3)	(29.7)	(24.6)
Gas Utility [Member] | Operating Segments [Member]
Operating Revenues	1,072.7	1,054.5	1,787.9	1,787.5
Gas Marketing [Member] | Operating Segments [Member]
Operating Revenues	46.0	60.6	82.3	134.7
Midstream [Member] | Operating Segments [Member]
Operating Revenues	21.5	16.5	36.4	31.7
Other Operating Segment [Member] | Consolidation, Eliminations [Member]
Operating Revenues	4.1	4.1	8.2	8.1
Spire Missouri [Member]
Operating Revenues	766.5	791.0	1,301.9	1,332.2
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member]
Revenue	746.0	773.9	1,260.6	1,313.6
Changes in accrued revenue under alternative revenue programs	20.5	17.1	41.3	18.6
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member] | Residential [Member]
Revenue	532.9	570.0	921.7	970.6
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member] | Commercial and Industrial [Member]
Revenue	185.7	185.2	295.9	308.1
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member] | Transportation [Member]
Revenue	10.1	9.9	19.1	19.0
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member] | Off-system and Other Incentive [Member]
Revenue	12.3	4.5	16.4	9.6
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member] | Other Customer Revenue [Member]
Revenue	5.0	4.3	7.5	6.3
Spire Alabama Inc [Member]
Operating Revenues	259.5	218.3	401.6	370.7
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member]
Revenue	263.5	219.8	406.6	372.6
Changes in accrued revenue under alternative revenue programs	(4.0)	(1.5)	(5.0)	(1.9)
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member] | Residential [Member]
Revenue	169.3	135.1	253.7	231.4
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member] | Commercial and Industrial [Member]
Revenue	68.8	61.5	103.5	95.1
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member] | Transportation [Member]
Revenue	24.0	20.8	44.8	40.1
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member] | Off-system and Other Incentive [Member]
Revenue	0.7	1.7	3.0	4.1
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member] | Other Customer Revenue [Member]
Revenue	0.7	0.7	1.6	1.9
Spire [Member]
Operating Revenues	1,128.5	1,123.4	1,885.1	1,937.4
Spire [Member] | Operating Segments [Member]
Operating Revenues	1,144.3	1,135.7	1,914.8	1,962.0
Spire [Member] | Consolidation, Eliminations [Member]
Operating Revenues	(15.8)
Spire [Member] | Segment Reporting, Reconciling Item, Excluding Corporate Nonsegment [Member]
Operating Revenues		(12.3)	(29.7)	(24.6)
Spire [Member] | Gas Utility [Member] | Operating Segments [Member]
Revenue	1,055.4	1,034.2	1,750.6	1,765.7
Changes in accrued revenue under alternative revenue programs	17.3	20.3	37.3	21.8
Total Gas Utility operating revenues	1,072.7	1,054.5	1,787.9	1,787.5
Spire [Member] | Gas Utility [Member] | Operating Segments [Member] | Residential [Member]
Revenue	729.5	730.2	1,222.3	1,248.2
Spire [Member] | Gas Utility [Member] | Operating Segments [Member] | Commercial and Industrial [Member]
Revenue	267.9	260.3	425.8	430.9
Spire [Member] | Gas Utility [Member] | Operating Segments [Member] | Transportation [Member]
Revenue	36.8	33.3	69.4	64.2
Spire [Member] | Gas Utility [Member] | Operating Segments [Member] | Off-system and Other Incentive [Member]
Revenue	13.0	6.1	19.4	13.7
Spire [Member] | Gas Utility [Member] | Operating Segments [Member] | Other Customer Revenue [Member]
Revenue	8.2	4.3	13.7	8.7
Spire [Member] | Gas Marketing [Member] | Operating Segments [Member]
Unregulated Operating Revenue	46.0	60.6	82.3	134.7
Spire [Member] | Midstream [Member] | Operating Segments [Member]
Unregulated Operating Revenue	21.5	16.5	36.4	31.7
Spire [Member] | Other Operating Segment [Member] | Operating Segments [Member]
Unregulated Operating Revenue	$ 4.1	$ 4.1	$ 8.2	$ 8.1

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Note 2 - Revenue - Taxes Associated with Natural Gas Utility Services (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Gross Receipts Tax Amounts	$ 60.0	$ 60.2	$ 91.1	$ 90.6
Spire Missouri [Member]
Gross Receipts Tax Amounts	44.0	45.6	66.5	67.7
Spire Alabama Inc [Member]
Gross Receipts Tax Amounts	$ 14.1	$ 12.6	$ 21.0	$ 19.4

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Note 3 - Earnings Per Common Share - Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions		3 Months Ended		6 Months Ended
		Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Net Income		$ 204.3	$ 179.2	$ 289.4	$ 270.2
Provision for preferred dividends		3.7	3.7	7.4	7.4
Income allocated to participating securities		0.3	0.4	0.4	0.5
Income Available to Common Shareholders		$ 200.3	$ 175.1	$ 281.6	$ 262.3
Basic (in shares)		55.8	52.5	54.6	52.5
Basic Earnings Per Common Share (in dollars per share)		$ 3.59	$ 3.33	$ 5.16	$ 5
Dilutive Effect of forward sales of common stock, restricted stock and restricted stock units (in millions)* (in shares)	[1]	0.1	0.1	0.1	0.1
Weighted Average Diluted Common Shares (in millions) (in shares)		55.9	52.6	54.7	52.6
Diluted Earnings Per Common Share (in dollars per share)		$ 3.58	$ 3.33	$ 5.14	$ 4.99
* Calculation excludes certain outstanding or potential common shares (shown in millions by period at the right) attributable to (1) forward sales of common stock, (2) stock units subject to performance or market conditions and (3) restricted stock, which could have a dilutive effect in the future (in shares)		0.4	0.5	0.3	0.4

[1] Calculation excludes certain outstanding or potential common shares (shown in millions by period at the right) attributable to (1) forward sales of common stock, (2) stock units subject to performance or market conditions, and (3) restricted stock, which could have a dilutive effect in the future

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Note 4 - Shareholders' Equity (Details Textual) - USD ($)			1 Months Ended	3 Months Ended
	Mar. 05, 2024	Dec. 11, 2023	Feb. 28, 2021	Mar. 31, 2024	Mar. 01, 2024	Jan. 25, 2024
Parent Company [Member] | Two Thousand Twenty One Series A Zero Point Seven Five Percentage Remarketable Senior Notes [Member]
Debt Instrument, Face Amount			$ 1,000
Debt Instrument, Interest Rate, Stated Percentage			0.75%
Corporate Unit [Member] | Parent Company [Member]
Stock Issued During Period, Shares, New Issues (in shares)	2,745,733		3,500,000
Equity Units, Stated Value (in dollars per share)			$ 50
Percentage of Undivided Beneficial Ownership Interest			5.00%
Equity Units, Applicable Market Value (in dollars per share)					$ 58.6809
Equity Units, Number of Common Stock Obligated to be Purchased After Adjustment (in shares)					0.7845
Equity Stock Units Issued	$ 175,000,000
At The Market Program [Member]
Forward Sales Agreements, Shares Settled (in shares)		1,744,549		0
Proceeds from Shares Settled		$ 112,200,000
Sale of Stock, Maximum Aggregate Offering Price						$ 200,000,000
Forward Sales Agreements, Shares (in shares)				204,405
Forward Sales Agreements, Proceeds If Settled				$ 12,100,000

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Note 5 - Regulatory Matters (Details Textual) - USD ($) $ in Thousands										15 Months Ended
	Apr. 16, 2024	Jan. 01, 2024	Dec. 14, 2023	Dec. 13, 2023	Oct. 04, 2023	Apr. 30, 2023	Apr. 20, 2023	Jan. 01, 2023	Dec. 26, 2022	Apr. 16, 2024	Mar. 31, 2024
Spire Missouri [Member] | Missouri Public Service Commission [Member] | Infrastructure System Replacement Surcharge [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount									$ 0	$ 36,900
Public Utilities, Approved Rate Increase (Decrease), Amount					$ 12,400		$ 7,700
Spire Missouri [Member] | Missouri Public Service Commission [Member] | Infrastructure System Replacement Surcharge [Member] | Subsequent Event [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 16,800
Spire Alabama Inc [Member] | Alabama Public Service Commission [Member]
Annual Revenue Increase From Rates, Amount		$ 14,300						$ 15,000
Spire Gulf [Member]
Annual Revenue Increase From Rates, Amount				$ 2,700
Public Utilities, Approved Rate, Increase Decrease Annualized Revenue				$ 2,000		$ 1,800		2,500
Spire Mississippi [Member]
Public Utilities, Approved Rate, Increase Decrease Annualized Revenue			$ 800					$ 800
Future Income Taxes Due From Customers and Pension and Other Postretirement Benefit Costs [Member]
Remaining Recovery Period of Regulatory Assets for which No Return on Investment During Recovery Period is Provided (Year)											20 years
PGA Assets [Member]
Remaining Recovery Period of Regulatory Assets for which No Return on Investment During Recovery Period is Provided (Year)											2 years
PGA Assets Not Earning A Return [Member]
Remaining Recovery Period of Regulatory Assets for which No Return on Investment During Recovery Period is Provided (Year)											15 years

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Note 5 - Regulatory Matters - Regulatory Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2024	Sep. 30, 2023	Mar. 31, 2023
Regulatory assets	$ 116.9	$ 348.3	$ 143.0
Regulatory Assets Noncurrent	1,272.7	1,249.2	1,316.7
Total Regulatory Assets	1,389.6	1,597.5	1,459.7
Regulatory Liability Current	25.1	7.3	5.3
Regulatory Liability Noncurrent	557.7	472.4	360.3
Total Regulatory Liabilities	582.8	479.7	365.6
Spire Missouri [Member]
Regulatory assets	89.2	293.1	62.7
Regulatory Assets Noncurrent	630.5	617.6	722.0
Total Regulatory Assets	719.7	910.7	784.7
Regulatory Liability Noncurrent	475.3	389.4	276.9
Total Regulatory Liabilities	475.3	389.4	276.9
Spire Alabama Inc [Member]
Regulatory assets	14.9	41.6	64.8
Regulatory Assets Noncurrent	619.1	606.9	568.3
Total Regulatory Assets	634.0	648.5	633.1
Regulatory Liability Current	18.7	0.0	0.0
Regulatory Liability Noncurrent	20.1	21.2	21.5
Total Regulatory Liabilities	38.8	21.2	21.5
Unamortized Purchased Gas Adjustments Asset [Member]
Regulatory assets	81.4	293.2	115.3
Regulatory Assets Noncurrent	0.0	23.0	181.3
Regulatory Liability Current	19.8	0.0	0.0
Regulatory Liability Noncurrent	90.8	11.2	0.0
Unamortized Purchased Gas Adjustments Asset [Member] | Spire Missouri [Member]
Regulatory assets	81.0	269.4	58.7
Regulatory Assets Noncurrent	0.0	23.0	181.3
Regulatory Liability Noncurrent	90.8	11.2	0.0
Unamortized Purchased Gas Adjustments Asset [Member] | Spire Alabama Inc [Member]
Regulatory assets	0.0	21.7	53.6
Regulatory Liability Current	18.7	0.0	0.0
Other Regulatory Assets (Liabilities) [Member]
Regulatory assets	35.5	55.1	27.7
Regulatory Assets Noncurrent	167.3	131.2	147.2
Regulatory Liability Current	5.3	7.3	5.3
Regulatory Liability Noncurrent	19.9	21.4	28.9
Other Regulatory Assets (Liabilities) [Member] | Spire Missouri [Member]
Regulatory assets	8.2	23.7	4.0
Regulatory Assets Noncurrent	153.2	116.0	130.7
Regulatory Liability Noncurrent	15.0	16.5	22.9
Other Regulatory Assets (Liabilities) [Member] | Spire Alabama Inc [Member]
Regulatory assets	14.9	19.9	11.2
Regulatory Assets Noncurrent	0.8	0.9	1.0
Regulatory Liability Noncurrent	3.3	3.3	3.5
Pension and Other Postretirement Plans Costs [Member]
Regulatory Assets Noncurrent	251.4	261.0	273.1
Regulatory Liability Noncurrent	192.6	185.2	161.0
Pension and Other Postretirement Plans Costs [Member] | Spire Missouri [Member]
Regulatory Assets Noncurrent	183.6	189.1	195.5
Regulatory Liability Noncurrent	165.4	156.5	132.7
Pension and Other Postretirement Plans Costs [Member] | Spire Alabama Inc [Member]
Regulatory Assets Noncurrent	64.2	67.8	73.1
Regulatory Liability Noncurrent	16.8	17.9	18.0
Deferred Income Tax Charge [Member]
Regulatory Assets Noncurrent	146.6	144.5	139.3
Deferred Income Tax Charge [Member] | Spire Missouri [Member]
Regulatory Assets Noncurrent	138.5	136.2	130.9
Deferred Income Tax Charge [Member] | Spire Alabama Inc [Member]
Regulatory Assets Noncurrent	1.9	2.0	2.0
Removal Costs [Member]
Regulatory Assets Noncurrent	649.2	633.2	516.4
Regulatory Liability Noncurrent	133.5	126.6	34.6
Removal Costs [Member] | Spire Missouri [Member]
Regulatory Assets Noncurrent	97.0	97.0	24.2
Regulatory Liability Noncurrent	95.8	90.4	0.0
Removal Costs [Member] | Spire Alabama Inc [Member]
Regulatory Assets Noncurrent	552.2	536.2	492.2
Renewable Energy Program [Member]
Regulatory Assets Noncurrent	58.2	56.3	59.4
Renewable Energy Program [Member] | Spire Missouri [Member]
Regulatory Assets Noncurrent	58.2	56.3	59.4
Estimated Deferred Taxes Due to Customers [Member]
Regulatory Liability Noncurrent	120.9	128.0	135.8
Estimated Deferred Taxes Due to Customers [Member] | Spire Missouri [Member]
Regulatory Liability Noncurrent	$ 108.3	$ 114.8	$ 121.3

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Note 5 - Regulatory Matters - Regulatory Assets Not Earning a Return (Details) - USD ($) $ in Millions	Mar. 31, 2024	Sep. 30, 2023	Mar. 31, 2023
Regulatory assets not earning a return	$ 487.2	$ 672.5	$ 607.4
Spire Missouri [Member]
Regulatory assets not earning a return	481.0	666.2	601.1
Pension and Other Postretirement Plans Costs [Member]
Regulatory assets not earning a return	133.8	133.4	127.8
Pension and Other Postretirement Plans Costs [Member] | Spire Missouri [Member]
Regulatory assets not earning a return	133.8	133.4	127.8
Deferred Income Tax Charge [Member]
Regulatory assets not earning a return	144.7	142.5	137.2
Deferred Income Tax Charge [Member] | Spire Missouri [Member]
Regulatory assets not earning a return	138.5	136.2	130.9
Unamortized Purchased Gas Adjustments Asset [Member]
Regulatory assets not earning a return	81.0	292.4	240.0
Unamortized Purchased Gas Adjustments Asset [Member] | Spire Missouri [Member]
Regulatory assets not earning a return	81.0	292.4	240.0
Other Regulatory Assets (Liabilities) [Member]
Regulatory assets not earning a return	127.7	104.2	102.4
Other Regulatory Assets (Liabilities) [Member] | Spire Missouri [Member]
Regulatory assets not earning a return	$ 127.7	$ 104.2	$ 102.4

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Note 6 - Financing (Details Textual) - USD ($) $ in Thousands			1 Months Ended
	Apr. 05, 2024	Jan. 03, 2024	Feb. 29, 2024	Mar. 31, 2024	Feb. 28, 2021
Remarketable Notes [Member]
Debt Instrument, Face Amount					$ 175,000
Debt Instrument, Interest Rate, Stated Percentage					0.75%
Senior Note [Member]
Debt Instrument, Face Amount			$ 175,000
Debt Instrument, Interest Rate, Stated Percentage			5.30%
Proceeds from Issuance of Debt			$ 173,500
Commercial Paper [Member] | Parent Company [Member]
Short Term Borrowings Used to Support Lending to Utilities				$ 319,800
Spire Missouri [Member] | Unsecured Term Loan [Member] | London Interbank Offered Rate LIBOR 1 [Member]
Line of Credit Facility, Covenant, Percentage of Total Capitalization				65.00%
Spire Missouri [Member] | Loans Payable [Member]
Debt Instrument, Face Amount		$ 200,000
Spire Missouri [Member] | Loans Payable [Member] | Subsequent Event [Member]
Repayments of Debt	$ 50,000
Spire Missouri [Member] | Loans Payable [Member] | Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, Basis Spread on Variable Rate		0.10%
Spire Missouri [Member] | Loans Payable [Member] | Adjusted SOFR [Member[
Debt Instrument, Basis Spread on Variable Rate		0.90%
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity				$ 1,300,000
Long-Term Line of Credit				$ 0
Revolving Credit Facility [Member] | Maximum [Member]
Line of Credit Facility, Covenant, Percentage of Total Capitalization				70.00%
Revolving Credit Facility [Member] | Spire [Member]
Line of Credit Facility, Maximum Borrowing Capacity				$ 450,000
Revolving Credit Facility [Member] | Spire Missouri [Member]
Line of Credit Facility, Maximum Borrowing Capacity				575,000
Revolving Credit Facility [Member] | Spire Alabama Inc [Member]
Line of Credit Facility, Maximum Borrowing Capacity				$ 275,000

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Note 6 - Financing - Short-term Borrowings (Details) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2024	Sep. 30, 2023	Mar. 31, 2023
Highest borrowings outstanding	$ 1,275.0
Lowest borrowings outstanding	754.6
Weighted average borrowings	$ 1,027.9
Weighted average interest rate	5.80%
Borrowings outstanding	$ 786.0	$ 955.5	$ 561.0
Weighted average interest rate	5.80%	5.60%	5.40%
Spire Alabama Inc [Member] | Spire Note [Member]
Highest borrowings outstanding	$ 132.5
Lowest borrowings outstanding	25.2
Weighted average borrowings	$ 94.5
Weighted average interest rate	5.70%
Borrowings outstanding	$ 37.4	$ 124.1	$ 121.3
Weighted average interest rate	5.60%	5.60%	5.30%
Spire Note [Member] | Spire Missouri [Member]
Highest borrowings outstanding	$ 643.6
Lowest borrowings outstanding	234.7
Weighted average borrowings	$ 469.9
Weighted average interest rate	5.70%
Borrowings outstanding	$ 243.9	$ 540.6	$ 60.7
Weighted average interest rate	5.60%	5.60%	5.30%
Parent Company [Member] | Commercial Paper [Member]
Highest borrowings outstanding	$ 1,135.0
Lowest borrowings outstanding	554.6
Weighted average borrowings	$ 930.6
Weighted average interest rate	5.70%
Borrowings outstanding	$ 586.0	$ 955.5	$ 361.0
Weighted average interest rate	5.60%	5.60%	5.30%

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Note 6 - Financing - Capitalized Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Interest Paid Capitalized	$ 4.0	$ 1.9	$ 7.8	$ 3.5
Spire Missouri [Member]
Interest Paid Capitalized	1.1	0.6	2.3	1.1
Spire Alabama Inc [Member]
Interest Paid Capitalized	$ 0.4	$ 0.6	$ 0.8	$ 1.3

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Note 7 - Fair Value of Financial Instruments - Estimated Fair Value of Financial Instruments Not Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Mar. 31, 2024	Sep. 30, 2023	Mar. 31, 2023
Reported Value Measurement [Member]
Cash and cash equivalents	$ 25.6	$ 5.6	$ 6.9
Notes payable	786.0	955.5	561.0
Long-term debt, including current portion	3,728.4	3,710.6	3,959.1
Reported Value Measurement [Member] | Spire Missouri [Member]
Cash and cash equivalents		0.8
Notes payable	200.0		200.0
Long-term debt, including current portion	1,786.2	1,785.4	2,034.5
Notes payable – associated companies	243.9	540.6	60.7
Reported Value Measurement [Member] | Spire Alabama Inc [Member]
Cash and cash equivalents	1.8	1.2	1.0
Long-term debt, including current portion	746.1	745.9	745.7
Notes payable – associated companies	37.4	124.1	121.3
Estimate of Fair Value Measurement [Member]
Cash and cash equivalents	25.6	5.6	6.9
Notes payable	786.0	955.5	561.0
Long-term debt, including current portion	3,452.0	3,270.2	3,704.2
Estimate of Fair Value Measurement [Member] | Spire Missouri [Member]
Cash and cash equivalents		0.8
Notes payable	200.0		200.0
Long-term debt, including current portion	1,649.4	1,592.4	1,930.2
Notes payable – associated companies	243.9	540.6	60.7
Estimate of Fair Value Measurement [Member] | Spire Alabama Inc [Member]
Cash and cash equivalents	1.8	1.2	1.0
Long-term debt, including current portion	685.3	648.0	696.6
Notes payable – associated companies	37.4	124.1	121.3
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	25.6	5.6	6.9
Notes payable	0.0	0.0	0.0
Long-term debt, including current portion	0.0	0.0	0.0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Spire Missouri [Member]
Cash and cash equivalents		0.8
Notes payable	0.0		0.0
Long-term debt, including current portion	0.0	0.0	0.0
Notes payable – associated companies	0.0	0.0	0.0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member] | Spire Alabama Inc [Member]
Cash and cash equivalents	1.8	1.2	1.0
Long-term debt, including current portion	0.0	0.0	0.0
Notes payable – associated companies	0.0	0.0	0.0
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member]
Cash and cash equivalents	0.0	0.0	0.0
Notes payable	786.0	955.5	561.0
Long-term debt, including current portion	3,452.0	3,270.2	3,704.2
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Spire Missouri [Member]
Cash and cash equivalents		0.0
Notes payable	200.0		200.0
Long-term debt, including current portion	1,649.4	1,592.4	1,930.2
Notes payable – associated companies	243.9	540.6	60.7
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Spire Alabama Inc [Member]
Cash and cash equivalents	0.0	0.0	0.0
Long-term debt, including current portion	685.3	648.0	696.6
Notes payable – associated companies	$ 37.4	$ 124.1	$ 121.3

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Note 8 - Fair Value Measurements - Schedule of Derivative Assets and Liabilities, Including Receivables and Payables (Details) - Fair Value, Recurring [Member] - USD ($) $ in Millions	Mar. 31, 2024	Sep. 30, 2023	Mar. 31, 2023
Derivative Asset Fair Value Gross Asset	$ 146.3
Effects of netting, asset	(15.0)
Derivative Liability Fair Value Gross Liability	22.7
Effects of netting, liability	(69.0)
Fair Value, Inputs, Level 1 [Member]
Derivative Asset Fair Value Gross Asset	70.0
Derivative Liability Fair Value Gross Liability	66.4
Fair Value, Inputs, Level 2 [Member]
Derivative Asset Fair Value Gross Asset	91.3
Derivative Liability Fair Value Gross Liability	25.3
U S Stock And Bond Mutual Funds [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset	22.6
Effects of netting, asset	0.0
U S Stock And Bond Mutual Funds [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset	16.6
Effects of netting, asset	0.0
U S Stock And Bond Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset	22.6
U S Stock And Bond Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset	16.6
U S Stock And Bond Mutual Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset	0.0
U S Stock And Bond Mutual Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset	0.0
N Y M E X And I C E Natural Gas Contracts [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset	0.0
Effects of netting, asset	(3.7)
Derivative Liability Fair Value Gross Liability	0.0
Effects of netting, liability	(35.7)
N Y M E X And I C E Natural Gas Contracts [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset	0.0
Effects of netting, asset	(8.6)
Derivative Liability Fair Value Gross Liability	0.0
Effects of netting, liability	(30.7)
N Y M E X And I C E Natural Gas Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset	3.7
Derivative Liability Fair Value Gross Liability	35.7
N Y M E X And I C E Natural Gas Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset	8.6
Derivative Liability Fair Value Gross Liability	30.7
N Y M E X And I C E Natural Gas Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset	0.0
Derivative Liability Fair Value Gross Liability	0.0
N Y M E X And I C E Natural Gas Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset	0.0
Derivative Liability Fair Value Gross Liability	0.0
Gasoline And Heating Oil Contracts [Member] | Gas Utility [Member]
Derivative Liability Fair Value Gross Liability	0.0
Effects of netting, liability	(0.1)
Gasoline And Heating Oil Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Utility [Member]
Derivative Liability Fair Value Gross Liability	0.0
Gasoline And Heating Oil Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Utility [Member]
Derivative Liability Fair Value Gross Liability	0.1
Natural Gas Commodity Contracts [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset	59.6
Effects of netting, asset	(2.6)
Derivative Liability Fair Value Gross Liability	22.7
Effects of netting, liability	(2.6)
Natural Gas Commodity Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset	0.0
Derivative Liability Fair Value Gross Liability	0.0
Natural Gas Commodity Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset	62.2
Derivative Liability Fair Value Gross Liability	25.3
U.S. Bonds [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset	17.1
Effects of netting, asset	0.0
U.S. Bonds [Member] | Fair Value, Inputs, Level 1 [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset	17.1
U.S. Bonds [Member] | Fair Value, Inputs, Level 2 [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset	0.0
Interest Rate Swap [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset	29.0
Effects of netting, asset	0.0
Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset	0.0
Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset	29.0
Global Bonds [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset	1.4
Effects of netting, asset	0.0
Global Bonds [Member] | Fair Value, Inputs, Level 1 [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset	1.4
Global Bonds [Member] | Fair Value, Inputs, Level 2 [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset	0.0
Spire Missouri [Member]
Derivative Asset Fair Value Gross Asset	22.6	$ 20.4	$ 20.7
Effects of netting, asset	(3.8)	(6.4)	(0.1)
Derivative Liability Fair Value Gross Liability			0.0
Effects of netting, liability			(63.2)
Spire Missouri [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Asset Fair Value Gross Asset	26.3	26.7	20.8
Derivative Liability Fair Value Gross Liability			63.2
Spire Missouri [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Asset Fair Value Gross Asset	0.1	0.1	0.0
Derivative Liability Fair Value Gross Liability			0.0
Spire Missouri [Member] | U S Stock And Bond Mutual Funds [Member]
Derivative Asset Fair Value Gross Asset	22.6	20.4	20.7
Effects of netting, asset	0.0	0.0	0.0
Derivative Liability Fair Value Gross Liability			0.0
Effects of netting, liability			(62.7)
Spire Missouri [Member] | U S Stock And Bond Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Asset Fair Value Gross Asset	22.6	20.4	20.7
Derivative Liability Fair Value Gross Liability			62.7
Spire Missouri [Member] | U S Stock And Bond Mutual Funds [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Asset Fair Value Gross Asset	0.0	0.0	0.0
Derivative Liability Fair Value Gross Liability			0.0
Spire Missouri [Member] | N Y M E X I C E Natural Gas Contracts [Member]
Derivative Asset Fair Value Gross Asset	0.0	0.0	0.0
Effects of netting, asset	(3.7)	(6.3)	(0.1)
Derivative Liability Fair Value Gross Liability	0.0	6.8
Effects of netting, liability	(35.7)	(44.0)
Spire Missouri [Member] | N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Asset Fair Value Gross Asset	3.7	6.3	0.1
Derivative Liability Fair Value Gross Liability	35.7	50.8
Spire Missouri [Member] | N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Asset Fair Value Gross Asset	0.0	0.0	0.0
Derivative Liability Fair Value Gross Liability	0.0	0.0
Spire Missouri [Member] | Gasoline And Heating Oil Contracts [Member]
Derivative Asset Fair Value Gross Asset		0.0
Effects of netting, asset	(0.1)	(0.1)
Derivative Liability Fair Value Gross Liability	0.0		0.0
Effects of netting, liability			(0.5)
Spire Missouri [Member] | Gasoline And Heating Oil Contracts [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Asset Fair Value Gross Asset		0.0
Derivative Liability Fair Value Gross Liability	0.0		0.5
Spire Missouri [Member] | Gasoline And Heating Oil Contracts [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Asset Fair Value Gross Asset		0.1
Derivative Liability Fair Value Gross Liability	$ 0.1		0.0
Spire Alabama Inc [Member]
Derivative Asset Fair Value Gross Asset		135.3	104.3
Effects of netting, asset		(20.1)	(33.3)
Derivative Liability Fair Value Gross Liability		30.8	33.3
Effects of netting, liability		(69.4)	(112.6)
Spire Alabama Inc [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Asset Fair Value Gross Asset		74.4	81.9
Derivative Liability Fair Value Gross Liability		72.6	111.3
Spire Alabama Inc [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Asset Fair Value Gross Asset		81.0	55.7
Derivative Liability Fair Value Gross Liability		27.6	34.6
Spire Alabama Inc [Member] | U S Stock And Bond Mutual Funds [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset		20.4	20.7
Effects of netting, asset		0.0	0.0
Spire Alabama Inc [Member] | U S Stock And Bond Mutual Funds [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset			0.0
Effects of netting, asset			(31.9)
Spire Alabama Inc [Member] | U S Stock And Bond Mutual Funds [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset		37.6	29.2
Effects of netting, asset		0.0	0.0
Spire Alabama Inc [Member] | U S Stock And Bond Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset		20.4	20.7
Spire Alabama Inc [Member] | U S Stock And Bond Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset			31.9
Spire Alabama Inc [Member] | U S Stock And Bond Mutual Funds [Member] | Fair Value, Inputs, Level 1 [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset		37.6	29.2
Spire Alabama Inc [Member] | U S Stock And Bond Mutual Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset		0.0	0.0
Spire Alabama Inc [Member] | U S Stock And Bond Mutual Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset			0.0
Spire Alabama Inc [Member] | U S Stock And Bond Mutual Funds [Member] | Fair Value, Inputs, Level 2 [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset		0.0	0.0
Spire Alabama Inc [Member] | N Y M E X I C E Natural Gas Contracts [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset		0.0	0.0
Effects of netting, asset		(6.3)	(0.1)
Derivative Liability Fair Value Gross Liability		6.8	0.0
Effects of netting, liability		(44.0)	(62.7)
Spire Alabama Inc [Member] | N Y M E X I C E Natural Gas Contracts [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset		0.0
Effects of netting, asset		(10.1)
Derivative Liability Fair Value Gross Liability		0.0	0.0
Effects of netting, liability		(21.8)	(48.1)
Spire Alabama Inc [Member] | N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset		6.3	0.1
Derivative Liability Fair Value Gross Liability		50.8	62.7
Spire Alabama Inc [Member] | N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset		10.1
Derivative Liability Fair Value Gross Liability		21.8	48.1
Spire Alabama Inc [Member] | N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset		0.0	0.0
Derivative Liability Fair Value Gross Liability		0.0	0.0
Spire Alabama Inc [Member] | N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset		0.0
Derivative Liability Fair Value Gross Liability		0.0	0.0
Spire Alabama Inc [Member] | Gasoline And Heating Oil Contracts [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset		0.0	0.0
Effects of netting, asset		(0.1)	(0.5)
Spire Alabama Inc [Member] | Gasoline And Heating Oil Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset		0.0	0.5
Spire Alabama Inc [Member] | Gasoline And Heating Oil Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset		0.1	0.0
Spire Alabama Inc [Member] | Natural Gas Commodity Contracts [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset		33.1	37.9
Effects of netting, asset		(3.6)	(1.3)
Derivative Liability Fair Value Gross Liability		24.0	31.1
Effects of netting, liability		(3.6)	(1.3)
Spire Alabama Inc [Member] | Natural Gas Commodity Contracts [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset		0.0	0.0
Derivative Liability Fair Value Gross Liability		0.0	0.0
Spire Alabama Inc [Member] | Natural Gas Commodity Contracts [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset		36.7	39.2
Derivative Liability Fair Value Gross Liability		27.6	32.4
Spire Alabama Inc [Member] | Interest Rate Swap [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset		44.2	16.5	[1]
Effects of netting, asset		0.0	0.0
Derivative Liability Fair Value Gross Liability			2.2
Effects of netting, liability			0.0
Spire Alabama Inc [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 1 [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset		0.0	0.0	[1]
Derivative Liability Fair Value Gross Liability			0.0
Spire Alabama Inc [Member] | Interest Rate Swap [Member] | Fair Value, Inputs, Level 2 [Member] | Other Operating Segment [Member]
Derivative Asset Fair Value Gross Asset		$ 44.2	16.5	[1]
Derivative Liability Fair Value Gross Liability			$ 2.2

[1] Subsequent to the issuance of its consolidated financial statements for the quarter ended March 31, 2023, during the fourth quarter of fiscal 2023, the Company identified an error in the fair value level presentation for certain line items in the Fair Value Measurements table. The presentaion has been corrected to reflect the impacted line items in Level 2 rather than Level 1 as of March 31, 2023. This immaterial correction did not impact the reported fair values or the consolidated financial statements.

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Note 9 - Pension Plans and Other Postretirement Benefits (Details Textual) - USD ($) $ in Thousands				3 Months Ended		6 Months Ended
	Dec. 26, 2022	Dec. 23, 2021	Dec. 22, 2021	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023	Sep. 30, 2023
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement				$ 0		$ 0
Regulatory Asset, Total				1,389,600	$ 1,459,700	1,389,600	$ 1,459,700	$ 1,597,500
Regulatory Liability				582,800	365,600	582,800	365,600	479,700
Pension Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement				(0)	(0)	(0)	(8,600)
Spire Alabama Inc [Member]
Regulatory Asset, Total				634,000	633,100	634,000	633,100	648,500
Regulatory Liability				38,800	21,500	38,800	21,500	21,200
Spire Alabama Inc [Member] | Pension Plan [Member]
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement						27,500
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement				(0)	(0)	(0)	(8,600)
Defined Benefit Plan, Plan Assets, Contributions by Employer						5,400
Anticipated Contributions to Pension Plans Qualified Trusts						11,000
Spire Alabama Inc [Member] | Two Plans [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement						$ (8,600)
Spire Alabama Inc [Member] | Pension Plan One [Member]
Defined Benefit Plan, Benefit Obligation, Settlement Losses Amortized Over Remaining Actuarial Life (Year)						13 years 4 months 24 days
Spire Alabama Inc [Member] | Pension Plan Two [Member]
Defined Benefit Plan, Benefit Obligation, Settlement Losses Amortized Over Remaining Actuarial Life (Year)						12 years 4 months 24 days
Spire Alabama Inc [Member] | Other Postretirement Benefits Plan [Member]
Anticipated Contributions to Pension Plans Qualified Trusts						$ 0
Spire Missouri [Member]
Regulatory Asset, Total				719,700	784,700	719,700	784,700	910,700
Regulatory Liability				$ 475,300	$ 276,900	475,300	$ 276,900	$ 389,400
Spire Missouri [Member] | Pension Costs [Member] | Missouri West [Member]
Regulatory Asset, Total		$ 4,400	$ 5,500
Spire Missouri [Member] | Pension Costs [Member] | Missouri East [Member]
Regulatory Asset, Total	$ 29,900	32,400	29,000
Spire Missouri [Member] | Pension and Other Postretirement Plans Costs [Member] | Missouri West [Member]
Regulatory Liabilities For Which No Return On Investment During Recovery Period Is Provided	800	$ 1,100	$ 3,300
Remaining Recovery Period of Regulatory Liabilities for which No Return on Investment During Recovery Period is Provided (Year)		8 years	8 years
Spire Missouri [Member] | Pension and Other Postretirement Plans Costs [Member] | Missouri East [Member]
Regulatory Assets for Which No Return on Investment During Recovery Period Is Provided	6,900	$ 11,000	$ 21,600
Remaining Recovery Period of Regulatory Assets for which No Return on Investment During Recovery Period is Provided (Year)			8 years
Additional Remaining Recovery Period of Regulatory Assets for Which No Return on Investment During Recovery Period Is Provided (Year)		8 years
Spire Missouri [Member] | Pension Plan [Member]
Anticipated Contributions to Pension Plans Qualified Trusts						16,600
Spire Missouri [Member] | Pension Plan [Member] | Qualified Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer						5,000
Spire Missouri [Member] | Pension Plan [Member] | Nonqualified Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer						0
Spire Missouri [Member] | Other Postretirement Benefits Plan [Member]
Anticipated Contributions to Pension Plans Qualified Trusts						$ 0
Postretirement Benefit Plans, Recovery in Rates Base Allowance		$ 8,600
Spire Missouri [Member] | Other Postretirement Benefits Plan [Member] | Missouri West [Member]
Regulatory Liability	100
Spire Missouri [Member] | Other Postretirement Benefits Plan [Member] | Missouri East [Member]
Regulatory Liability	$ 900

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Note 9 - Pension Plans and Other Postretirement Benefits - Net Pension Costs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Pension Plan [Member]
Service cost – benefits earned during the period	$ 3.9	$ 3.9	$ 7.9	$ 8.0
Interest cost on projected benefit obligation	6.6	5.9	13.4	12.3
Expected return on plan assets	(6.1)	(5.7)	(12.4)	(12.1)
Amortization of prior service credit	(1.2)	(1.2)	(2.3)	(2.3)
Amortization of actuarial loss	1.6	1.6	3.2	3.2
Loss on lump-sum settlements	0.0	0.0	0.0	8.6
Subtotal	4.8	4.5	9.8	17.7
Regulatory adjustment	8.8	10.4	17.5	12.2
Net pension cost	13.6	14.9	27.3	29.9
Pension Plan [Member] | Spire Missouri [Member]
Service cost – benefits earned during the period	2.6	2.9	5.2	5.7
Interest cost on projected benefit obligation	4.7	4.4	9.5	8.9
Expected return on plan assets	(4.2)	(4.5)	(8.5)	(9.0)
Amortization of prior service credit	(0.5)	(0.5)	(1.0)	(1.0)
Amortization of actuarial loss	1.4	1.6	2.9	3.1
Subtotal	4.0	3.9	8.1	7.7
Regulatory adjustment	6.3	8.1	12.6	16.2
Net pension cost	10.3	12.0	20.7	23.9
Pension Plan [Member] | Spire Alabama Inc [Member]
Service cost – benefits earned during the period	1.1	0.8	2.3	1.9
Interest cost on projected benefit obligation	1.2	0.8	2.5	2.1
Expected return on plan assets	(1.2)	(0.5)	(2.4)	(1.6)
Amortization of prior service credit	(0.6)	(0.6)	(1.2)	(1.2)
Amortization of actuarial loss	0.3	0.2	0.5	0.3
Loss on lump-sum settlements	0.0	0.0	0.0	8.6
Subtotal	0.8	0.7	1.7	10.1
Regulatory adjustment	2.3	2.1	4.5	(4.4)
Net pension cost	3.1	2.8	6.2	5.7
Other Postretirement Benefits Plan [Member]
Service cost – benefits earned during the period	1.0	1.2	2.1	2.4
Interest cost on projected benefit obligation	2.4	2.2	4.5	4.3
Expected return on plan assets	(4.2)	(3.9)	(8.2)	(7.8)
Amortization of prior service credit	0.1	0.0	0.2	0.1
Amortization of actuarial loss	(1.1)	(1.1)	(2.1)	(2.1)
Subtotal	(1.8)	(1.6)	(3.5)	(3.1)
Regulatory adjustment	0.3	0.2	0.5	0.3
Net pension cost	(1.5)	(1.4)	(3.0)	(2.8)
Other Postretirement Benefits Plan [Member] | Spire Missouri [Member]
Service cost – benefits earned during the period	0.9	1.0	1.8	2.0
Interest cost on projected benefit obligation	1.7	1.7	3.3	3.3
Expected return on plan assets	(2.7)	(2.7)	(5.4)	(5.3)
Amortization of prior service credit	0.1	0.1	0.3	0.3
Amortization of actuarial loss	(0.9)	(0.8)	(1.8)	(1.6)
Subtotal	(0.9)	(0.7)	(1.8)	(1.3)
Regulatory adjustment	0.7	0.7	1.3	1.3
Net pension cost	(0.2)	0.0	(0.5)	0.0
Other Postretirement Benefits Plan [Member] | Spire Alabama Inc [Member]
Service cost – benefits earned during the period	0.1	0.1	0.3	0.3
Interest cost on projected benefit obligation	0.6	0.5	1.1	0.9
Expected return on plan assets	(1.3)	(1.3)	(2.6)	(2.5)
Amortization of prior service credit	0.0	(0.1)	(0.1)	(0.2)
Amortization of actuarial loss	(0.1)	(0.2)	(0.1)	(0.3)
Subtotal	(0.7)	(1.0)	(1.4)	(1.8)
Regulatory adjustment	(0.5)	(0.4)	(0.9)	(0.9)
Net pension cost	$ (1.2)	$ (1.4)	$ (2.3)	$ (2.7)

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Note 10 - Information by Operating Segment (Details Textual)	6 Months Ended
	Mar. 31, 2024
Number of Reportable Segments	3

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Note 10 - Information by Operating Segment - Segment Information by Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Revenues from external customers	$ 1,128.5	$ 1,123.4	$ 1,885.1	$ 1,937.4
Intersegment revenues	0.0	0.0	0.0	0.0
Operating Revenues	1,128.5	1,123.4	1,885.1	1,937.4
Depreciation and amortization	68.9	62.6	135.9	124.7
Interest Expense, Net	52.2	47.2	102.8	90.8
Income Tax Expense	49.4	40.9	70.4	62.5
Net economic earnings (loss)	196.6	199.2	279.3	284.3
Capital expenditures	182.8	153.0	409.3	307.8
Consolidation, Eliminations [Member]
Revenues from external customers	0.0	0.0	0.0	0.0
Intersegment revenues	(15.8)	(12.3)	(29.7)	(24.6)
Operating Revenues	(15.8)	(12.3)	(29.7)	(24.6)
Depreciation and amortization	0.0	0.0	0.0	0.0
Interest Expense, Net	(10.4)	(7.2)	(24.6)	(17.1)
Income Tax Expense	0.0	0.0	0.0	0.0
Net economic earnings (loss)	0.0	0.0	0.0	0.0
Capital expenditures	(0.5)	0.0	(0.9)	0.0
Gas Utility [Member] | Operating Segments [Member]
Revenues from external customers	1,072.4	1,054.4	1,787.6	1,787.4
Intersegment revenues	0.3	0.1	0.3	0.1
Operating Revenues	1,072.7	1,054.5	1,787.9	1,787.5
Depreciation and amortization	65.4	60.2	129.6	119.9
Interest Expense, Net	38.3	35.5	77.3	67.6
Income Tax Expense	41.7	38.9	57.4	51.3
Net economic earnings (loss)	188.0	183.9	263.8	246.8
Capital expenditures	137.3	143.7	312.2	290.0
Gas Marketing [Member] | Operating Segments [Member]
Revenues from external customers	46.0	60.6	82.3	134.7
Intersegment revenues	0.0	0.0	0.0	0.0
Operating Revenues	46.0	60.6	82.3	134.7
Depreciation and amortization	0.4	0.4	0.8	0.7
Interest Expense, Net	0.0	0.0	0.0	0.0
Income Tax Expense	7.6	0.8	11.4	11.3
Net economic earnings (loss)	15.5	21.8	22.7	47.5
Capital expenditures	0.0	0.0	0.0	0.2
Midstream [Member] | Operating Segments [Member]
Revenues from external customers	10.0	8.2	15.0	15.0
Intersegment revenues	11.5	8.3	21.4	16.7
Operating Revenues	21.5	16.5	36.4	31.7
Depreciation and amortization	3.0	2.0	5.3	3.9
Interest Expense, Net	2.0	1.9	3.8	3.8
Income Tax Expense	1.5	1.5	2.1	2.9
Net economic earnings (loss)	3.8	4.2	6.2	8.0
Capital expenditures	46.0	9.3	98.0	17.0
Other Operating Segment [Member]
Depreciation and amortization	0.1	0.0	0.2	0.2
Interest Expense, Net	22.3	17.0	46.3	36.5
Income Tax Expense	(1.4)	(0.3)	(0.5)	(3.0)
Other Operating Segment [Member] | Consolidation, Eliminations [Member]
Revenues from external customers	0.1	0.2	0.2	0.3
Intersegment revenues	4.0	3.9	8.0	7.8
Operating Revenues	4.1	4.1	8.2	8.1
Net economic earnings (loss)	(10.7)	(10.7)	(13.4)	(18.0)
Capital expenditures	$ 0.0	$ 0.0	$ 0.0	$ 0.6

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Note 10 - Information by Operating Segment - Net Economic Earnings to Net Income (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Net Income	$ 204.3	$ 179.2	$ 289.4	$ 270.2
Fair value and timing adjustments	(10.2)	26.6	(15.4)	18.8
Acquisition activities	0.0	0.0	1.9	0.0
Income tax adjustments	2.5	(6.6)	3.4	(4.7)
Net Economic Earnings	$ 196.6	$ 199.2	$ 279.3	$ 284.3

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Note 10 - Information by Operating Segment - Total Assets by Segment (Details) - USD ($) $ in Millions	Mar. 31, 2024	Sep. 30, 2023	Mar. 31, 2023
Total Assets	$ 10,711.4	$ 10,313.6	$ 10,049.0
Operating Segments [Member] | Gas Utility [Member]
Total Assets	8,646.3	8,486.7	8,317.6
Operating Segments [Member] | Gas Marketing [Member]
Total Assets	191.4	332.0	335.0
Operating Segments [Member] | Midstream [Member]
Total Assets	845.2	574.3	506.2
Operating Segments [Member] | Other Operating Segment [Member]
Total Assets	2,467.2	2,533.3	1,959.1
Consolidation, Eliminations [Member]
Total Assets	$ (1,438.7)	$ (1,612.7)	$ (1,068.9)

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Note 11 - Commitments and Contingencies (Details Textual) $ in Millions	6 Months Ended
	Mar. 31, 2024 USD ($)
Long-Term Purchase Commitment, Amount	$ 2,107.5
Capital Committed to Contribute to Partnership	10.0
Remaining Unfunded Capital Commitment	4.6
Spire Missouri [Member]
Long-Term Purchase Commitment, Amount	1,553.2
Spire Alabama Inc [Member]
Long-Term Purchase Commitment, Amount	$ 383.9