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, 2023
	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 30, 2023, was as follows:

Spire Inc.	Common Stock, par value $1.00 per share	52,597,027
Spire Missouri Inc.	Common Stock, par value $1.00 per share (all owned by Spire Inc.)	25,325
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	31
	Note 7. Fair Value of Financial Instruments	32
	Note 8. Fair Value Measurements	34
	Note 9. Pension Plans and Other Postretirement Benefits	37
	Note 10. Information by Operating Segment	40
	Note 11. Commitments and Contingencies	43
Item 2	Management’s Discussion and Analysis of Financial Condition and Results of Operations	46
Item 3	Quantitative and Qualitative Disclosures About Market Risk	64
Item 4	Controls and Procedures	64
PART II. OTHER INFORMATION
Item 1	Legal Proceedings	65
Item 1A	Risk Factors	65
Item 2	Unregistered Sales of Equity Securities and Use of Proceeds	65
Item 3	Defaults upon Senior Securities	65
Item 4	Mine Safety Disclosures	65
Item 5	Other Information	65
Item 6	Exhibits	66
SIGNATURES		67

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 STL Pipeline	Spire STL Pipeline LLC, or the 65-mile FERC-regulated pipeline it constructed and operates to deliver natural gas into eastern Missouri
Midstream	Segment including Spire Storage and Spire STL Pipeline	Spire Storage	The physical natural gas storage operations of Spire Storage West LLC
MoPSC	Missouri Public Service Commission	U.S.	United States
MSPSC	Mississippi Public Service Commission	Utilities	Spire Missouri, Spire Alabama and the subsidiaries of Spire EnergySouth
O&M	Operation and maintenance expense

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, 2022.

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)	2023		2022			2023		2022
Operating Revenues	$	1,123.4	$	880.9		$	1,937.4	$	1,436.3
Operating Expenses:
Natural gas		586.5		392.0			1,005.7		641.2
Operation and maintenance		132.1		113.2			264.2		229.6
Depreciation and amortization		62.6		58.9			124.7		115.8
Taxes, other than income taxes		81.9		71.6			132.3		109.2
Total Operating Expenses		863.1		635.7			1,526.9		1,095.8
Operating Income		260.3		245.2			410.5		340.5
Interest Expense, Net		47.2		27.5			90.8		56.1
Other Income (Expense), Net		7.0		(3.4	)		13.0		4.0
Income Before Income Taxes		220.1		214.3			332.7		288.4
Income Tax Expense		40.9		40.7			62.5		59.1
Net Income		179.2		173.6			270.2		229.3
Provision for preferred dividends		3.7		3.7			7.4		7.4
Income allocated to participating securities		0.4		0.2			0.5		0.3
Net Income Available to Common Shareholders	$	175.1	$	169.7		$	262.3	$	221.6
Weighted Average Number of Common Shares Outstanding:
Basic		52.5		51.8			52.5		51.7
Diluted		52.6		51.9			52.6		51.8
Basic Earnings Per Common Share	$	3.33	$	3.27		$	5.00	$	4.28
Diluted Earnings Per Common Share	$	3.33	$	3.27		$	4.99	$	4.28

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)	2023			2022			2023			2022
Net Income	$	179.2		$	173.6		$	270.2		$	229.3
Other Comprehensive (Loss) Income, Before Tax:
Cash flow hedging derivative instruments:
Net hedging (loss) gain arising during the period		(6.8	)		18.7			(9.8	)		13.9
Amounts reclassified into regulatory liabilities		(17.5	)		—			(17.5	)		—
Amounts reclassified into net income		(0.5	)		(0.4	)		(0.8	)		(0.7	)
Net (loss) gain on cash flow hedging derivative instruments		(24.8	)		18.3			(28.1	)		13.2
Net gain on defined benefit pension and other postretirement plans		0.1			0.1			0.2			0.2
Net unrealized loss on available for sale securities		—			(0.1	)		—			(0.2	)
Other Comprehensive (Loss) Income, Before Tax		(24.7	)		18.3			(27.9	)		13.2
Income Tax (Benefit) Expense Related to Items of Other Comprehensive Income or Loss		(5.8	)		4.3			(6.6	)		3.1
Other Comprehensive (Loss) Income, Net of Tax		(18.9	)		14.0			(21.3	)		10.1
Comprehensive Income	$	160.3		$	187.6		$	248.9		$	239.4

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)	2023			2022			2022
ASSETS
Utility Plant	$	7,892.4		$	7,664.9		$	7,443.7
Less: Accumulated depreciation and amortization		2,358.5			2,294.5			2,241.9
Net Utility Plant		5,533.9			5,370.4			5,201.8
Non-utility Property (net of accumulated depreciation and amortization of $60.6, $50.7 and $41.3 at March 31, 2023, September 30, 2022, and March 31, 2022, respectively)		520.4			491.4			475.8
Other Investments		131.3			87.8			89.0
Total Other Property and Investments		651.7			579.2			564.8
Current Assets:
Cash and cash equivalents		6.9			6.5			8.3
Accounts receivable:
Utility		453.7			210.8			389.2
Other		166.0			443.8			245.4
Allowance for credit losses		(40.6	)		(31.9	)		(35.1	)
Delayed customer billings		85.6			21.3			54.7
Inventories:
Natural gas		146.8			371.8			125.0
Propane gas		8.6			8.6			8.6
Materials and supplies		48.9			41.9			34.7
Regulatory assets		143.0			355.4			164.0
Prepayments		32.5			41.1			26.6
Other		60.2			122.7			67.9
Total Current Assets		1,111.6			1,592.0			1,089.3
Deferred Charges and Other Assets:
Goodwill		1,171.6			1,171.6			1,171.6
Regulatory assets		1,316.7			1,112.4			1,106.8
Other		263.5			258.1			267.0
Total Deferred Charges and Other Assets		2,751.8			2,542.1			2,545.4
Total Assets	$	10,049.0		$	10,083.7		$	9,401.3

6

SPIRE INC.

CONDENSED CONSOLIDATED BALANCE SHEETS (Continued)

(UNAUDITED)

	March 31,		September 30,		March 31,
	2023		2022		2022
CAPITALIZATION AND LIABILITIES
Capitalization:
Preferred stock ($25.00 par value per share; 10.0 million depositary shares authorized, issued and outstanding at March 31, 2023, September 30, 2022, and March 31, 2022)	$	242.0	$	242.0	$	242.0
Common stock (par value $1.00 per share; 70.0 million shares authorized; 52.6 million, 52.5 million, and 52.1 million shares issued and outstanding at March 31, 2023, September 30, 2022, and March 31, 2022, respectively)		52.6		52.5		52.1
Paid-in capital		1,576.5		1,571.3		1,541.1
Retained earnings		1,089.5		905.5		992.3
Accumulated other comprehensive income		25.9		47.2		13.7
Total Shareholders' Equity		2,986.5		2,818.5		2,841.2
Temporary equity		18.8		13.1		11.8
Long-term debt (less current portion)		3,702.5		2,958.5		3,207.3
Total Capitalization		6,707.8		5,790.1		6,060.3
Current Liabilities:
Current portion of long-term debt		256.6		281.2		31.2
Notes payable		561.0		1,037.5		607.1
Accounts payable		232.3		617.4		367.5
Advance customer billings		6.8		18.7		6.3
Wages and compensation accrued		38.6		50.2		39.3
Customer deposits		28.3		28.2		29.4
Taxes accrued		79.9		90.1		67.4
Regulatory liabilities		5.3		3.7		3.2
Other		198.1		226.6		244.4
Total Current Liabilities		1,406.9		2,353.6		1,395.8
Deferred Credits and Other Liabilities:
Deferred income taxes		737.9		675.1		666.5
Pension and postretirement benefit costs		158.6		163.0		199.2
Asset retirement obligations		531.5		520.9		530.1
Regulatory liabilities		360.3		418.2		400.4
Other		146.0		162.8		149.0
Total Deferred Credits and Other Liabilities		1,934.3		1,940.0		1,945.2
Commitments and Contingencies (Note 11)
Total Capitalization and Liabilities	$	10,049.0	$	10,083.7	$	9,401.3

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, 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 issued 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 issued 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 depositary 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

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, 2022:
Balance at December 31, 2021		51,742,481		$	51.7	$	242.0	$	1,516.9		$	859.5		$	(0.3	)	$	2,669.8
Net income		—			—		—		—			173.6			—			173.6
Common stock issued		354,000			0.3		—		22.8			—			—			23.1
Dividend reinvestment plan		7,036			—		—		0.4			—			—			0.4
Stock-based compensation costs		—			—		—		1.1			—			—			1.1
Stock issued under stock-based compensation plans		13,452			0.1		—		(0.1	)		—			—			—
Employees’ tax withholding for stock-based compensation		(302	)		—		—		—			—			—			—
Temporary equity adjustment to redemption value		—			—		—		—			(1.3	)		—			(1.3	)
Dividends declared:
Common stock ($0.685 per share)		—			—		—		—			(35.8	)		—			(35.8	)
Preferred stock ($0.36875 per depositary share)		—			—		—		—			(3.7	)		—			(3.7	)
Other comprehensive income, net of tax		—			—		—		—			—			14.0			14.0
Balance at March 31, 2022		52,116,667		$	52.1	$	242.0	$	1,541.1		$	992.3		$	13.7		$	2,841.2
Six Months Ended March 31, 2022:
Balance at September 30, 2021		51,684,883		$	51.7	$	242.0	$	1,517.9		$	843.0		$	3.6		$	2,658.2
Net income		—			—		—		—			229.3			—			229.3
Common stock issued		354,000			0.3		—		22.8			—			—			23.1
Dividend reinvestment plan		13,269			—		—		0.8			—			—			0.8
Stock-based compensation costs		—			—		—		1.4			—			—			1.4
Stock issued under stock-based compensation plans		91,428			0.1		—		(0.1	)		—			—			—
Employees’ tax withholding for stock-based compensation		(26,913	)		—		—		(1.7	)		—			—			(1.7	)
Temporary equity adjustment to redemption value		—			—		—		—			(1.2	)		—			(1.2	)
Dividends declared:
Common stock ($1.37 per share)		—			—		—		—			(71.4	)		—			(71.4	)
Preferred stock ($0.7375 per depository share)		—			—		—		—			(7.4	)		—			(7.4	)
Other comprehensive income, net of tax		—			—		—		—			—			10.1			10.1
Balance at March 31, 2022		52,116,667		$	52.1	$	242.0	$	1,541.1		$	992.3		$	13.7		$	2,841.2

* 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)	2023			2022
Operating Activities:
Net Income	$	270.2		$	229.3
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		124.7			115.8
Deferred income taxes and investment tax credits		62.5			59.1
Changes in assets and liabilities:
Accounts receivable		43.7			(3.4	)
Inventories		218.2			136.9
Regulatory assets and liabilities		(35.5	)		(230.5	)
Accounts payable		(372.9	)		(21.1	)
Delayed/advance customer billings, net		(76.3	)		(71.4	)
Taxes accrued		(10.8	)		(11.2	)
Other assets and liabilities		(50.6	)		(51.4	)
Other		6.7			3.0
Net cash provided by operating activities		179.9			155.1
Investing Activities:
Capital expenditures		(307.8	)		(275.9	)
Advance payment for business acquisition		(37.1	)		—
Other		4.2			2.7
Net cash used in investing activities		(340.7	)		(273.2	)
Financing Activities:
Issuance of long-term debt		755.0			300.0
Repayment of long-term debt		(31.2	)		(55.8	)
Repayment of short-term debt, net		(476.5	)		(64.9	)
Issuance of common stock		3.6			24.0
Dividends paid on common stock		(74.5	)		(70.1	)
Dividends paid on preferred stock		(7.4	)		(7.4	)
Other		(7.5	)		(3.8	)
Net cash provided by financing activities		161.5			122.0
Net Increase in Cash, Cash Equivalents, and Restricted Cash		0.7			3.9
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period		20.5			11.3
Cash, Cash Equivalents, and Restricted Cash at End of Period	$	21.2		$	15.2
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	$	(80.5	)	$	(56.5	)
Income taxes		(1.4	)		(0.2	)

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)	2023		2022			2023		2022
Operating Revenues	$	791.0	$	571.2		$	1,332.2	$	919.1
Operating Expenses:
Natural gas		465.7		287.8			782.4		444.1
Operation and maintenance		77.4		64.3			154.5		130.6
Depreciation and amortization		39.2		35.9			77.8		70.1
Taxes, other than income taxes		61.2		53.0			97.6		78.7
Total Operating Expenses		643.5		441.0			1,112.3		723.5
Operating Income		147.5		130.2			219.9		195.6
Interest Expense, Net		24.6		14.2			46.6		28.7
Other Income (Expense), Net		5.9		(2.4	)		10.9		3.5
Income Before Income Taxes		128.8		113.6			184.2		170.4
Income Tax Expense		16.7		15.4			24.8		26.9
Net Income		112.1		98.2			159.4		143.5
Other Comprehensive Income, Net of Tax		0.1		0.1			0.2		0.2
Comprehensive Income	$	112.2	$	98.3		$	159.6	$	143.7

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)	2023			2022			2022
ASSETS
Utility Plant	$	4,731.2		$	4,550.4		$	4,416.9
Less: Accumulated depreciation and amortization		1,027.1			982.1			949.2
Net Utility Plant		3,704.1			3,568.3			3,467.7
Other Property and Investments		66.7			58.9			66.9
Current Assets:
Accounts receivable:
Utility		362.0			131.5			288.6
Associated companies		3.8			3.7			3.6
Other		32.5			44.5			35.3
Allowance for credit losses		(34.5	)		(24.9	)		(27.0	)
Delayed customer billings		84.5			16.1			53.5
Inventories:
Natural gas		86.7			215.3			80.9
Propane gas		8.6			8.6			8.6
Materials and supplies		24.4			22.0			18.6
Regulatory assets		62.7			288.1			112.7
Prepayments		18.5			23.3			16.0
Total Current Assets		649.2			728.2			590.8
Deferred Charges and Other Assets:
Goodwill		210.2			210.2			210.2
Regulatory assets		722.0			547.6			572.7
Other		107.2			105.0			126.4
Total Deferred Charges and Other Assets		1,039.4			862.8			909.3
Total Assets	$	5,459.4		$	5,218.2		$	5,034.7

12

SPIRE MISSOURI INC.

CONDENSED BALANCE SHEETS (Continued)

(UNAUDITED)

	March 31,			September 30,			March 31,
	2023			2022			2022
CAPITALIZATION AND LIABILITIES
Capitalization:
Paid-in capital and common stock (par value $1.00 per share; 50.0 million shares authorized; 25,325, 25,325, and 24,929 shares issued and outstanding at March 31, 2023, September 30, 2022, and March 31, 2022, respectively)	$	816.2		$	816.2		$	788.4
Retained earnings		1,061.3			931.9			960.5
Accumulated other comprehensive loss		(2.5	)		(2.7	)		(4.0	)
Total Shareholder's Equity		1,875.0			1,745.4			1,744.9
Long-term debt (less current portion)		1,784.5			1,387.7			1,637.1
Total Capitalization		3,659.5			3,133.1			3,382.0
Current Liabilities:
Current portion of long-term debt		250.0			250.0			—
Notes payable		200.0			—			—
Notes payable – associated companies		60.7			445.3			277.2
Accounts payable		78.8			119.0			96.9
Accounts payable – associated companies		11.3			13.3			6.9
Advance customer billings		—			7.0			—
Wages and compensation accrued		20.4			33.8			27.1
Customer deposits		6.0			6.5			7.7
Taxes accrued		47.2			50.4			37.4
Other		52.5			45.6			49.4
Total Current Liabilities		726.9			970.9			502.6
Deferred Credits and Other Liabilities:
Deferred income taxes		533.3			500.1			498.9
Pension and postretirement benefit costs		99.8			115.5			132.9
Asset retirement obligations		112.8			110.6			146.3
Regulatory liabilities		276.9			331.8			313.7
Other		50.2			56.2			58.3
Total Deferred Credits and Other Liabilities		1,073.0			1,114.2			1,150.1
Commitments and Contingencies (Note 11)
Total Capitalization and Liabilities	$	5,459.4		$	5,218.2		$	5,034.7

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, 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
Three Months Ended March 31, 2022:
Balance at December 31, 2021		24,577	$	0.1	$	765.0	$	862.3		$	(4.1	)	$	1,623.3
Net income		—		—		—		98.2			—			98.2
Common stock issued to Spire Inc.		352		—		23.3		—			—			23.3
Other comprehensive income, net of tax		—		—		—		—			0.1			0.1
Balance at March 31, 2022		24,929	$	0.1	$	788.3	$	960.5		$	(4.0	)	$	1,744.9
Six Months Ended March 31, 2022:
Balance at September 30, 2021		24,577	$	0.1	$	765.0	$	817.0		$	(4.2	)	$	1,577.9
Net income		—		—		—		143.5			—			143.5
Common stock issued to Spire Inc.		352		—		23.3		—			—			23.3
Other comprehensive income, net of tax		—		—		—		—			0.2			0.2
Balance at March 31, 2022		24,929	$	0.1	$	788.3	$	960.5		$	(4.0	)	$	1,744.9

* 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)	2023			2022
Operating Activities:
Net Income	$	159.4		$	143.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		77.8			70.1
Deferred income taxes and investment tax credits		24.8			26.9
Changes in assets and liabilities:
Accounts receivable		(208.9	)		18.2
Inventories		126.2			92.4
Regulatory assets and liabilities		0.6			(181.3	)
Accounts payable		(31.5	)		12.9
Delayed/advance customer billings, net		(75.4	)		(70.8	)
Taxes accrued		(3.2	)		(3.8	)
Other assets and liabilities		(47.4	)		(41.7	)
Other		0.8			0.7
Net cash provided by operating activities		23.2			67.1
Investing Activities:
Capital expenditures		(206.6	)		(176.0	)
Other		1.8			1.4
Net cash used in investing activities		(204.8	)		(174.6	)
Financing Activities:
Issuance of long-term debt		400.0			300.0
Issuance (repayment) of short-term debt, net		200.0			(250.0	)
(Repayments to) borrowings from Spire, net		(384.5	)		36.2
Issuance of common stock		—			23.3
Dividends paid		(30.0	)		—
Other		(3.9	)		(2.0	)
Net cash provided by financing activities		181.6			107.5
Net Change in Cash and Cash Equivalents		—			—
Cash and Cash Equivalents at Beginning of Period		—			—
Cash and Cash Equivalents at End of Period	$	—		$	—
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	$	(44.1	)	$	(28.3	)
Income taxes		—			—

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)	2023		2022		2023		2022
Operating Revenues	$	218.3	$	204.1	$	370.7	$	330.7
Operating Expenses:
Natural gas		61.8		52.1		131.2		97.6
Operation and maintenance		34.5		32.9		69.6		67.4
Depreciation and amortization		17.0		16.7		34.0		33.2
Taxes, other than income taxes		16.1		14.5		26.7		23.5
Total Operating Expenses		129.4		116.2		261.5		221.7
Operating Income		88.9		87.9		109.2		109.0
Interest Expense, Net		9.0		4.7		17.3		9.8
Other Income, Net		0.3		0.1		0.7		0.5
Income Before Income Taxes		80.2		83.3		92.6		99.7
Income Tax Expense	20.2		20.9			23.4		25.1
Net Income	$	60.0	$	62.4	$	69.2	$	74.6

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)	2023			2022			2022
ASSETS
Utility Plant	$	2,781.4		$	2,732.6		$	2,643.9
Less: Accumulated depreciation and amortization		1,208.7			1,184.1			1,154.0
Net Utility Plant		1,572.7			1,548.5			1,489.9
Current Assets:
Cash and cash equivalents		1.0			2.4			0.2
Accounts receivable:
Utility		75.4			69.9			86.0
Associated companies		0.8			1.3			0.7
Other		5.3			6.5			5.6
Allowance for credit losses		(5.3	)		(6.3	)		(7.1	)
Delayed customer billings		1.0			4.8			1.2
Inventories:
Natural gas		41.4			72.5			32.0
Materials and supplies		20.5			16.3			13.1
Regulatory assets		64.8			56.9			41.0
Prepayments		3.8			5.8			3.6
Total Current Assets		208.7			230.1			176.3
Deferred Charges and Other Assets:
Regulatory assets		568.3			538.2			506.7
Deferred income taxes		—			11.0			9.1
Other		81.9			81.3			63.6
Total Deferred Charges and Other Assets		650.2			630.5			579.4
Total Assets	$	2,431.6		$	2,409.1		$	2,245.6

17

SPIRE ALABAMA INC.

CONDENSED BALANCE SHEETS (Continued)

(UNAUDITED)

	March 31,		September 30,		March 31,
	2023		2022		2022
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)	$	289.9	$	316.9	$	322.9
Retained earnings		645.3		589.1		611.2
Total Shareholder's Equity		935.2		906.0		934.1
Long-term debt		745.7		571.5		571.4
Total Capitalization		1,680.9		1,477.5		1,505.5
Current Liabilities:
Notes payable – associated companies		121.3		260.9		156.6
Accounts payable		29.8		85.6		50.8
Accounts payable – associated companies		7.0		4.4		6.2
Advance customer billings		5.3		9.9		5.2
Wages and compensation accrued		5.4		7.6		5.6
Customer deposits	19.6			19.0		19.0
Taxes accrued		26.4		31.3		24.3
Other		15.7		22.4		12.3
Total Current Liabilities		230.5		441.1		280.0
Deferred Credits and Other Liabilities:
Deferred income taxes		12.3		—		—
Pension and postretirement benefit costs		52.8		40.5		59.1
Asset retirement obligations		406.9		398.7		370.0
Regulatory liabilities		21.5		23.0		24.7
Other		26.7		28.3		6.3
Total Deferred Credits and Other Liabilities		520.2		490.5		460.1
Commitments and Contingencies (Note 11)
Total Capitalization and Liabilities	$	2,431.6	$	2,409.1	$	2,245.6

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, 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
Three Months Ended March 31, 2022:
Balance at December 31, 2021		1,972,052	$	—	$	322.9		$	556.8		$	879.7
Net income		—		—		—			62.4			62.4
Dividends declared		—		—		—			(8.0	)		(8.0	)
Balance at March 31, 2022		1,972,052	$	—	$	322.9		$	611.2		$	934.1
Six Months Ended March 31, 2022:
Balance at September 30, 2021		1,972,052	$	—	$	328.9		$	552.6		$	881.5
Net income		—		—		—			74.6			74.6
Return of capital to Spire		—		—		(6.0	)		—			(6.0	)
Dividends declared		—		—		—			(16.0	)		(16.0	)
Balance at March 31, 2022		1,972,052	$	—	$	322.9		$	611.2		$	934.1

See the accompanying Notes to Financial Statements.

19

SPIRE ALABAMA INC.

CONDENSED STATEMENTS OF CASH FLOWS

(UNAUDITED)

	Six Months Ended March 31,
(In millions)	2023			2022
Operating Activities:
Net Income	$	69.2		$	74.6
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization		34.0			33.2
Deferred income taxes and investment tax credits		23.4			25.1
Changes in assets and liabilities:
Accounts receivable		(4.8	)		(34.9	)
Inventories		26.9			1.3
Regulatory assets and liabilities		(32.3	)		(50.7	)
Accounts payable		(39.2	)		7.4
Delayed/advance customer billings		(0.7	)		(0.6	)
Taxes accrued		(4.9	)		(6.1	)
Other assets and liabilities		12.6			(14.2	)
Other		0.2			(0.1	)
Net cash provided by operating activities		84.4			35.0
Investing Activities:
Capital expenditures		(72.9	)		(71.0	)
Other		0.7			0.6
Net cash used in investing activities		(72.2	)		(70.4	)
Financing Activities:
Issuance of long-term debt		175.0			—
Repayment of long-term debt		—			(50.0	)
(Repayments to) borrowings from Spire, net		(139.6	)		107.6
Return of capital to Spire		(27.0	)		(6.0	)
Dividends paid		(21.0	)		(16.0	)
Other		(1.0	)		—
Net cash (used in) provided by financing activities		(13.6	)		35.6
Net (Decrease) Increase in Cash and Cash Equivalents		(1.4	)		0.2
Cash and Cash Equivalents at Beginning of Period		2.4			—
Cash and Cash Equivalents at End of Period	$	1.0		$	0.2
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	$	(12.6	)	$	(10.1	)
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, 2022.

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.

Certain information is presented by reportable segment, as described below. Effective during the first quarter of fiscal 2023, the Company changed its reportable segments to reflect changes in the way its chief operating decision maker evaluates the performance of its operations, develops strategy and allocates capital resources. Specifically, Midstream, which was formerly included in Other, is now reported separately. The Company's historical segment disclosures have been recast to be consistent with the current presentation.

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 and Spire STL 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.

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,
	2023		2022		2023		2022
Spire Missouri
Purchases of natural gas from Spire Marketing	$	13.8	$	17.9	$	42.3	$	36.1
Transportation services received from Spire STL Pipeline		7.8		7.8		15.9		15.9
Sales of natural gas to Spire Marketing		0.1		—		0.1		—
Spire Alabama
Purchases of natural gas from Spire Marketing	$	—	$	—	$	1.1	$	—

22

 

RESTRICTED CASH AND OTHER INVESTMENTS – In Spire’s statement of cash flows for the period ended March 31, 2023, total Cash, Cash Equivalents, and Restricted Cash included $14.3, $14.0 and $6.9 of restricted cash reported in “Other Investments” on the Company’s balance sheet as of March 31, 2023,  September 30, 2022, and March 31, 2022, 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.

A subsidiary of Spire Storage, in the Midstream segment, acquired a natural gas storage facility in northern Oklahoma formerly known as Salt Plains Storage on April 1, 2023. This will be reflected as a business combination in Spire’s third fiscal quarter ending June 30, 2023, with the assets acquired and liabilities assumed recorded based on their fair value at the acquisition date, and goodwill, if any, measured as the excess of the purchase price over the value of the net assets acquired. Because the closing date occurred on a weekend, Spire made a refundable payment of the $37.1 preliminary purchase price in advance on Friday, March 31, 2023, which is reflected in “Other Investments” in the consolidated balance sheet as of that date and as “Advance payment for business acquisition” on the related consolidated statement of cash flows.

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,
	2023		2022		2022
Spire	$	66.3	$	77.8	$	38.8
Spire Missouri		35.4		45.6		28.7
Spire Alabama		5.2		19.2		5.0

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,	2023			2022			2023			2022			2023			2022
Allowance at beginning of period	$	34.5		$	31.4		$	28.2		$	23.8		$	5.5		$	6.7
Provision for expected credit losses		8.2			5.2			7.3			4.7			0.5			0.5
Write-offs, net of recoveries		(2.1	)		(1.5	)		(1.0	)		(1.5	)		(0.7	)		(0.1	)
Allowance at end of period	$	40.6		$	35.1		$	34.5		$	27.0		$	5.3		$	7.1

Six Months Ended March 31,	2023			2022			2023			2022			2023			2022
Allowance at beginning of period	$	31.9		$	30.3		$	24.9		$	22.6		$	6.3		$	6.6
Provision for expected credit losses		12.3			6.7			11.1			6.8			0.7			—
Write-offs, net of recoveries		(3.6	)		(1.9	)		(1.5	)		(2.4	)		(1.7	)		0.5
Allowance at end of period	$	40.6		$	35.1		$	34.5		$	27.0		$	5.3		$	7.1

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2. REVENUE

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

	Three Months Ended March 31,						Six Months Ended March 31,
	2023			2022			2023			2022
Spire
Gas Utility:
Residential	$	730.2		$	687.3		$	1,248.2		$	1,029.3
Commercial and industrial		260.3			85.6			430.9			189.4
Transportation		33.3			33.5			64.2			64.7
Off-system and other incentive		6.1			12.0			13.7			16.8
Other customer revenue		4.3			6.5			8.7			10.1
Total revenue from contracts with customers		1,034.2			824.9			1,765.7			1,310.3
Changes in accrued revenue under alternative revenue programs		20.3			(7.5	)		21.8			10.6
Total Gas Utility operating revenues		1,054.5			817.4			1,787.5			1,320.9
Gas Marketing		60.6			59.4			134.7			107.3
Midstream		16.5			13.8			31.7			26.7
Other		4.1			4.3			8.1			8.0
Total before eliminations		1,135.7			894.9			1,962.0			1,462.9
Intersegment eliminations (see Note 10, Information by Operating Segment)		(12.3	)		(14.0	)		(24.6	)		(26.6	)
Total Operating Revenues	$	1,123.4		$	880.9		$	1,937.4		$	1,436.3

Spire Missouri
Residential	$	570.0	$	529.1		$	970.6	$	776.2
Commercial and industrial		185.2		19.9			308.1		88.1
Transportation		9.9		10.1			19.0		19.3
Off-system and other incentive		4.5		11.3			9.6		15.8
Other customer revenue		4.3		3.6			6.3		5.9
Total revenue from contracts with customers		773.9		574.0			1,313.6		905.3
Changes in accrued revenue under alternative revenue programs		17.1		(2.8	)		18.6		13.8
Total Operating Revenues	$	791.0	$	571.2		$	1,332.2	$	919.1

Spire Alabama
Residential	$	135.1		$	129.9		$	231.4		$	210.0
Commercial and industrial		61.5			51.6			95.1			77.6
Transportation	20.8			20.7			40.1				40.1
Off-system and other incentive		1.7			0.6			4.1			1.0
Other customer revenue		0.7			1.9			1.9			2.7
Total revenue from contracts with customers		219.8			204.7			372.6			331.4
Changes in accrued revenue under alternative revenue programs		(1.5	)		(0.6	)		(1.9	)		(0.7	)
Total Operating Revenues	$	218.3		$	204.1		$	370.7		$	330.7

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,
	2023		2022		2023		2022
Spire	$	60.2	$	51.9	$	90.6	$	73.8
Spire Missouri		45.6		39.0		67.7		53.9
Spire Alabama		12.6		11.3		19.4		17.0

3. EARNINGS PER COMMON SHARE

	Three Months Ended March 31,				Six Months Ended March 31,
	2023		2022		2023		2022
Basic Earnings Per Common Share:
Net Income	$	179.2	$	173.6	$	270.2	$	229.3
Less: Provision for preferred dividends		3.7		3.7		7.4		7.4
Income allocated to participating securities		0.4		0.2		0.5		0.3
Income Available to Common Shareholders	$	175.1	$	169.7	$	262.3	$	221.6
Weighted Average Common Shares Outstanding (in millions)		52.5		51.8		52.5		51.7
Basic Earnings Per Common Share	$	3.33	$	3.27	$	5.00	$	4.28
Diluted Earnings Per Common Share:
Net Income	$	179.2	$	173.6	$	270.2	$	229.3
Less: Provision for preferred dividends		3.7		3.7		7.4		7.4
Income allocated to participating securities		0.4		0.2		0.5		0.3
Income Available to Common Shareholders	$	175.1	$	169.7	$	262.3	$	221.6
Weighted Average Common Shares Outstanding (in millions)		52.5		51.8		52.5		51.7
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)		52.6		51.9		52.6		51.8
Diluted Earnings Per Common Share	$	3.33	$	3.27	$	4.99	$	4.28
* 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		0.5		0.2		0.4		0.2

4. SHAREHOLDERS’ EQUITY

ATM Program

On February 6, 2019, Spire entered into an “at-the-market” (ATM) equity distribution agreement, supplemented as of May 14, 2019, pursuant to which 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). On April 28, 2022, Spire's board approved a new authorization for the sale of additional shares with an aggregate offering price of up to $200.0 with a prospectus supplement dated May 9, 2022.

25

 

Settled sales under this ATM program are included in “Common stock issued” in the Condensed Consolidated Statements of Shareholders’ Equity. Also, in the second quarter of fiscal 2023, Spire executed forward sale agreements for 228,690 shares of its common stock, which must be settled on or before September 28, 2023. 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, 2023, it would have generated net proceeds of $16.0.

As of March 31, 2023, under the ATM program, Spire may sell additional shares with an aggregate offering price of up to $152.8 under the current Board of Directors authorization expiring May 2025.

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, 2023, September 30, 2022, and March 31, 2022.

	March 31,		September 30,		March 31,
Spire	2023		2022		2022
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	115.3	$	322.2	$	146.6
Other		27.7		33.2		17.4
Total Current Regulatory Assets		143.0		355.4		164.0
Noncurrent:
Pension and postretirement benefit costs		273.1		294.5		314.8
Cost of removal		516.4		493.7		456.3
Future income taxes due from customers		139.3		137.8		138.0
Energy efficiency		59.4		57.2		53.1
Unamortized purchased gas adjustments		181.3		—		35.2
Other		147.2		129.2		109.4
Total Noncurrent Regulatory Assets		1,316.7		1,112.4		1,106.8
Total Regulatory Assets	$	1,459.7	$	1,467.8	$	1,270.8
Regulatory Liabilities:
Current:
Other	$	5.3	$	3.7	$	3.2
Total Current Regulatory Liabilities		5.3		3.7		3.2
Noncurrent:
Deferred taxes due to customers		135.8		145.3		152.1
Pension and postretirement benefit costs		161.0		172.6		179.4
Accrued cost of removal		34.6		32.9		38.3
Unamortized purchased gas adjustments		—		53.0		17.1
Other		28.9		14.4		13.5
Total Noncurrent Regulatory Liabilities		360.3		418.2		400.4
Total Regulatory Liabilities	$	365.6	$	421.9	$	403.6

26

 

	March 31,		September 30,		March 31,
Spire Missouri	2023		2022		2022
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	58.7	$	275.1	$	112.5
Other		4.0		13.0		0.2
Total Current Regulatory Assets		62.7		288.1		112.7
Noncurrent:
Future income taxes due from customers		130.9		129.2		129.3
Pension and postretirement benefit costs		195.5		222.9		227.5
Energy efficiency		59.4		57.2		53.1
Unamortized purchased gas adjustments		181.3		—		35.2
Cost of removal		24.2		25.2		34.9
Other		130.7		113.1		92.7
Total Noncurrent Regulatory Assets		722.0		547.6		572.7
Total Regulatory Assets	$	784.7	$	835.7	$	685.4
Regulatory Liabilities:
Noncurrent:
Deferred taxes due to customers	$	121.3	$	127.9	$	134.7
Pension and postretirement benefit costs		132.7		143.6		148.3
Accrued cost of removal		—		—		5.7
Unamortized purchased gas adjustments		—		53.0		17.1
Other		22.9		7.3		7.9
Total Noncurrent Regulatory Liabilities		276.9		331.8		313.7
Total Regulatory Liabilities	$	276.9	$	331.8	$	313.7

	March 31,		September 30,		March 31,
Spire Alabama	2023		2022		2022
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	53.6	$	43.8	$	31.0
Other		11.2		13.1		10.0
Total Current Regulatory Assets		64.8		56.9		41.0
Noncurrent:
Future income taxes due from customers		2.0		2.2		2.2
Pension and postretirement benefit costs		73.1		66.5		82.0
Cost of removal		492.2		468.5		421.4
Other		1.0		1.0		1.1
Total Noncurrent Regulatory Assets		568.3		538.2		506.7
Total Regulatory Assets	$	633.1	$	595.1	$	547.7
Regulatory Liabilities:
Noncurrent:
Pension and postretirement benefit costs	$	18.0	$	19.4	$	21.1
Other		3.5		3.6		3.6
Total Noncurrent Regulatory Liabilities		21.5		23.0		24.7
Total Regulatory Liabilities	$	21.5	$	23.0	$	24.7

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,
	2023		2022		2022
Spire
Pension and postretirement benefit costs	$	127.8	$	152.9	$	152.0
Future income taxes due from customers		137.2		135.6		135.7
Unamortized purchased gas adjustments		240.0		275.1		147.7
Other		102.4		122.7		120.2
Total Regulatory Assets Not Earning a Return	$	607.4	$	686.3	$	555.6
Spire Missouri
Pension and postretirement benefit costs	$	127.8	$	152.9	$	152.0
Future income taxes due from customers		130.9		129.2		129.3
Unamortized purchased gas adjustments		240.0		275.1		147.7
Other		102.4		122.7		120.2
Total Regulatory Assets Not Earning a Return	$	601.1	$	679.9	$	549.2

Like all the Company’s regulatory assets, these regulatory assets as of March 31, 2023 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 mid- February 2021, the central U.S. experienced a period of unusually severe cold weather (“Winter Storm Uri”), and Spire Missouri implemented an Operational Flow Order (OFO) to preserve the integrity of its distribution system. During this time, Spire Missouri was required to purchase additional natural gas supply, both to ensure adequate supply for its firm utility customers, and to cover the shortfall created when third-party marketers failed to deliver natural gas supply to its city gates on behalf of their customers. In accordance with its MoPSC-approved OFO tariff, Spire Missouri invoiced the cost of gas and associated penalties totaling $195.8 to non-compliant marketers and recorded accounts receivable. Recoveries collected are an offset to cost of natural gas for firm utility customers through the Purchased Gas Adjustment (PGA) and Actual Cost Adjustment (ACA), so are net income neutral to Spire Missouri. The three largest counterparties did not remit payment when due, so Spire Missouri filed suit against them in federal court to recover the invoiced amounts. In late February 2022, the parties to the OFO waiver suits agreed to a settlement in principle, pursuant to which marketers will reimburse Spire Missouri for the actual cost of its incremental gas purchases to serve marketers’ customers during Winter Storm Uri, so Spire Missouri reduced revenue, accounts receivable, cost of gas and regulatory liabilities by approximately $150 in the second quarter of fiscal 2022. The settlement, which reduced the total amount due from the three marketers to approximately $42, was approved by the MoPSC in late May 2022, and the marketers are making payments to Spire Missouri.

28

 

In the first quarter of fiscal 2022, the MoPSC approved Spire Missouri compliance tariffs with an effective date of December 23, 2021 consistent with its order in Spire Missouri's general rate case. These new tariffs were designed to increase Spire Missouri’s aggregate annual gross base rate revenues by $72.2, which includes $24.9 incremental and $47.3 already being collected through the Infrastructure System Replacement Surcharge (ISRS). The MoPSC required Spire Missouri to defer all non-operational overheads from December 23, 2021 through September 30, 2022 into a regulatory asset totaling $42.8.

On April 1, 2022, Spire Missouri filed tariff sheets to initiate a new general rate case proceeding intended to address the deferred amounts, along with other matters. The parties reached a Full Unanimous Stipulation and Agreement (the “Stipulation”) to resolve all issues in the case, which was filed with the MoPSC on November 4, 2022. On November 18, 2022, the Stipulation was approved, including authorization of $78.0 in new base rate revenue (including $19.0 already being collected through ISRS) and recovery of deferred overheads through amortization of the related regulatory asset. New base rates became effective on December 26, 2022.

The ISRS allows Spire Missouri expedited recovery for its investment to replace qualifying components of its infrastructure without the necessity of a formal rate case. As noted above, 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. On April 20, 2023, the MoPSC approved an incremental annual ISRS revenue increase of $7.7, reflecting eligible pipe replacement from October 2022 through February 2023. This rate increase will be effective May 6, 2023.

The Utilities purchase the natural gas to be delivered to their customers and typically defer the recovery of this expense thereby lessening the immediate impact on customers’ bills of higher realized commodity costs. These deferred gas balances are expected to be recovered over the next 12 months pursuant to tariff adjustments effective in Missouri (and Alabama). Spire Missouri filed Purchase Gas Adjustment (PGA) changes to its tariff in November and January which were approved and became effective November 29, 2022 and January 19, 2023, respectively.

On May 27, 2022, the MoPSC staff filed an ACA Review Recommendation and Report for the ACA period that first includes transportation charges incurred by Spire Missouri for service on the Spire STL Pipeline. That report concluded that the transaction complied with Missouri affiliate transaction rules and was prudent, and it recommended no disallowance of any Spire STL Pipeline related costs from the ACA mechanism. On July 11, 2022, Spire Missouri filed its response comments in support of the recommendation. The Missouri Office of the Public Counsel and Environmental Defense Fund (EDF) filed comments on July 29 and August 1, 2022, respectively, raising concerns about the Spire STL Pipeline transaction, the ACA process itself, and other matters. The MoPSC has entered a scheduling order in the matter which includes an evidentiary hearing on July 25-26, 2023. On January 6, 2023, Spire Missouri filed a Partial Stipulation and Agreement resolving all other issues raised by the MoPSC staff in its Recommendation and Report. The partial stipulation was approved by the MoPSC on January 25, 2023, and will result in a $0.6 credit to the ACA balance. Issues relating to Spire STL Pipeline costs remain contested. On April 28, 2023, MoPSC Staff and its consultant filed direct testimony confirming their position that the transaction was prudent and in compliance with Missouri affiliate transaction rules. EDF also filed direct testimony arguing Spire Missouri imprudently changed the physical manner in which it receives supply and created risk for customers, and advocating for a disallowance of $27.7 in the case. No other parties filed direct testimony. Rebuttal testimony from all parties is due to be filed in late May 2023.

The MoPSC has 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 includes the impact of Winter Storm Uri on Spire Missouri's natural gas portfolio. On December 15, 2022, the MoPSC staff filed its Reports and Recommendations in these cases. Spire Missouri filed its responses to these Reports and Recommendations on January 19, 2023. The MoPSC has ordered that a status report or procedural schedule be submitted no later than May 22, 2023.

29

 

Spire Alabama

On October 26, 2022, Spire Alabama made its annual Rate Stabilization and Equalization (RSE) rate filing with the APSC, presenting the utility’s budget for the fiscal year ending September 30, 2023, including net income and a calculation of allowed return on average common equity (ROE). The budget reflected the start of amortization of the accumulated deferred income tax (ADIT) adjustment related to the Tax Cuts and Jobs Act of 2017 (TCJA). New rates designed to provide an annual revenue increase of $15.0 became effective January 1, 2023.

Spire Alabama filed GSA rate increases effective December 1, 2022, and January 1, 2023, primarily attributable to higher natural gas prices.

Spire

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

In October 2022, Spire Gulf made its annual RSE rate filing with the APSC based on its budget for fiscal 2023 and an allowed ROE of 9.95%. The budget reflected the start of amortization of the excess ADIT from the TCJA. New rates designed to provide an annual revenue increase of $2.5 became effective January 1, 2023.

On September 14, 2022, Spire Mississippi filed its Rate Stabilization Adjustment Rider with the Mississippi Public Service Commission (MSPSC) for the rate year ended June 30, 2022, which reflected an increase to annual revenues of $1.3. 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 an annual revenue increase of $0.8 through rates that became effective on January 1, 2023.

In August 2018, the FERC approved an order issuing Certificates of Public Convenience and Necessity (“FERC Certificates”) for the Spire STL Pipeline ( “August 2018 Order”). In November 2019, the FERC issued an Order on Rehearing of the August 2018 Order dismissing or denying the outstanding requests for rehearing filed by several parties, dismissing the request for stay filed by one party, and noting the withdrawal of the request for rehearing by another party. In January 2020, two of the rehearing parties filed petitions for review of the FERC’s orders with the U.S. Court of Appeals for the District of Columbia Circuit (“DC Circuit”). On June 22, 2021, the DC Circuit issued an order vacating the FERC Certificates and remanding the matter back to the FERC for further action. On September 14, 2021 and December 3, 2021, the FERC issued temporary certificates for the continued authorized operation of the Spire STL Pipeline pending the outcome of its determination on remand. On December 15, 2022, the FERC issued its order on remand reissuing permanent FERC Certificates for the continued operation of Spire STL Pipeline. On January 17, 2023, EDF requested rehearing of the December 15, 2022 FERC order, but on February 17, 2023, that rehearing request was denied by operation of law. On April 20, 2023, the FERC issued an “Order Addressing Arguments Raised on Rehearing” in which it further clarified the rationale for denying EDF's rehearing request. EDF has 60 days, or until June 19, 2023, to file an appeal with the DC Circuit or another federal appellate court.

30

 

6. FINANCING

Short-term

Spire, Spire Missouri and Spire Alabama have a syndicated revolving credit facility pursuant to a loan agreement with 12 banks, which was amended July 22, 2022, to increase the commitment and sublimits and extend the agreement through July 22, 2027. The amended loan 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, 2023, total debt was less than 65% of total capitalization for each borrower. There were no borrowings against this credit facility as of March 31, 2023.

Spire utilizes a commercial paper program (“CP Program”) pursuant to which Spire 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.

In March 2021, Spire Missouri entered into a loan agreement with several banks for a $250.0, 364-day unsecured term loan with an interest rate based on LIBOR plus 65 basis points. The loan was repaid in March 2022.

On January 5, 2023, Spire Missouri entered into a loan agreement with several banks for a $250.0 unsecured term loan due October 5, 2023. Interest accrues at either, as selected by the Company, a base rate or an adjusted forward-looking secured overnight financing rate (“SOFR”). Adjusted SOFR is based on one- or three-month term SOFR, as selected by the Company, plus a SOFR adjustment of 0.10% per annum plus a margin of 0.80% per annum.

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, 2023, $224.2 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, 2023
Highest borrowings outstanding	$	1,282.0		$	250.0		$	656.9		$	274.0		$	1,482.0
Lowest borrowings outstanding		354.4			—			3.8			76.7			554.4
Weighted average borrowings		922.7			111.0			383.6			134.9			1,033.7
Weighted average interest rate		4.6	%		5.4	%		4.5	%		4.6	%		4.7	%
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	%
As of September 30, 2022
Borrowings outstanding	$	1,037.5		$	—		$	445.3		$	260.9		$	1,037.5
Weighted average interest rate		3.3	%		0.0	%		3.3	%		3.3	%		3.3	%
As of March 31, 2022
Borrowings outstanding	$	607.1		$	—		$	277.2		$	156.6		$	607.1
Weighted average interest rate		0.9	%		0.0	%		0.9	%		0.9	%		0.9	%

31

 

Long-term

The long-term debt agreements of Spire, Spire Missouri and Spire Alabama contain customary financial covenants and default provisions. As of March 31, 2023, 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,
	2023		2022		2023		2022
Spire	$	1.9	$	1.0	$	3.5	$	2.1
Spire Missouri		0.6		0.1		1.1		0.1
Spire Alabama		0.6		0.8		1.3		1.6

On  October 13, 2022, Spire Alabama issued $90.0 of notes due  October 15, 2029, bearing interest at 5.32% and $85.0 of notes due  October 15, 2032, bearing interest at 5.41%. Interest is payable semi-annually. The notes are senior unsecured obligations and rank equal in right to payment with all other senior unsecured indebtedness of Spire Alabama. Also on  October 13, 2022, Spire Gulf issued $30.0 of first mortgage bonds due  October 15, 2037, bearing interest at 5.61% payable semi-annually. The bonds rank equal in right to payment with the other first mortgage bonds issued by Spire Gulf. The bonds were issued under a supplemental indenture with collateral fall away provisions whereby, under certain conditions, Spire Gulf  may elect to exchange the bonds, which are secured, for unsecured notes.

On February 13, 2023, Spire Missouri issued $400.0 aggregate principal amount of its 4.800% Series First Mortgage Bonds due 2033. Interest is payable semi-annually. The notes are senior secured indebtedness of Spire Missouri and rank equally with all other existing and future senior secured indebtedness issued by Spire Missouri under its mortgage and deed of trust. The bonds are secured by a first mortgage lien on substantially all of the real properties of Spire Missouri, subject to limited exceptions.

On March 7, 2023, Spire issued $150.0 aggregate principal amount of its 5.80% Series 2023 Senior Notes due March 15, 2033. Interest is payable semi-annually. The notes are senior unsecured obligations of the Company.

In the quarter ended March 31, 2023, the company settled interest rate swap contracts with a notional amount of $325.0 and a realized gain of $39.5. This gain will be amortized against the interest expense related to the 10-year debt issued during that quarter (described in the previous two paragraphs).

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.

32

 

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, 2023, September 30, 2022, and March 31, 2022.

					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, 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
As of September 30, 2022
Cash and cash equivalents	$	6.5	$	6.5	$	6.5	$	—
Notes payable		1,037.5		1,037.5		—		1,037.5
Long-term debt, including current portion		3,239.7		2,851.8		—		2,851.8
As of March 31, 2022
Cash and cash equivalents	$	8.3	$	8.3	$	8.3	$	—
Notes payable		607.1		607.1		—		607.1
Long-term debt, including current portion		3,238.5		3,299.1		—		3,299.1
Spire Missouri
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
As of September 30, 2022
Notes payable – associated companies	$	445.3	$	445.3	$	—	$	445.3
Long-term debt, including current portion		1,637.7		1,473.9		—		1,473.9
As of March 31, 2022
Notes payable – associated companies	$	277.2	$	277.2	$	—	$	277.2
Long-term debt		1,637.1		1,691.9		—		1,691.9
Spire Alabama
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
As of September 30, 2022
Cash and cash equivalents	$	2.4	$	2.4	$	2.4	$	—
Notes payable – associated companies		260.9		260.9		—		260.9
Long-term debt		571.5		485.0		—		485.0
As of March 31, 2022
Cash and cash equivalents	$	0.2	$	0.2	$	0.2	$	—
Notes payable – associated companies		156.6		156.6		—		156.6
Long-term debt		571.4		588.0		—		588.0

33

 

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 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 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, 2023, September 30, 2022, and March 31, 2022. 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, 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	$	137.6	$	—	$	(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	$	145.9	$	—	$	(112.6	)	$	33.3

34

 

	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, 2022
ASSETS
Gas Utility:
U.S. stock/bond mutual funds	$	19.1	$	—	$	—		$	19.1
NYMEX/ICE natural gas contracts		57.8		—		(57.8	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		91.8		—		(91.8	)		—
Natural gas commodity contracts		56.6		—		(4.0	)		52.6
Other:
U.S. stock/bond mutual funds		29.3		—		—			29.3
Interest rate swaps		63.6		—		—			63.6
Total	$	318.2	$	—	$	(153.6	)	$	164.6
LIABILITIES
Gas Utility:
NYMEX/ICE natural gas contracts	$	30.7	$	—	$	(30.7	)	$	—
Gas Marketing:
NYMEX/ICE natural gas contracts		82.3		—		(82.3	)		—
Natural gas commodity contracts		65.5		—		(4.0	)		61.5
Total	$	178.5	$	—	$	(117.0	)	$	61.5
As of March 31, 2022
ASSETS
Gas Utility:
U.S. stock/bond mutual funds	$	23.0	$	—	$	—		$	23.0
NYMEX/ICE natural gas contracts		58.9		—		(58.9	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		96.1		—		(88.4	)		7.7
Natural gas commodity contracts		30.8		—		(1.0	)		29.8
Other:
U.S. stock/bond mutual funds		24.1		—		—			24.1
Interest rate swaps		28.8		—		(7.9	)		20.9
Total	$	261.7	$	—	$	(156.2	)	$	105.5
LIABILITIES
Gas Marketing:
NYMEX/ICE natural gas contracts	$	40.4	$	—	$	(40.4	)	$	—
Natural gas commodity contracts		106.2		—		(1.0	)		105.2
Other:
Interest rate swaps		7.9		—		(7.9	)		—
Total	$	154.5	$	—	$	(49.3	)	$	105.2

35

 

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, 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	)	$	—
As of September 30, 2022
ASSETS
U.S. stock/bond mutual funds	$	19.1	$	—	$	—		$	19.1
NYMEX/ICE natural gas contracts		57.8		—		(57.8	)		—
Total	$	76.9	$	—	$	(57.8	)	$	19.1
LIABILITIES
NYMEX/ICE natural gas contracts	$	30.7	$	—	$	(30.7	)	$	—
As of March 31, 2022
ASSETS
U.S. stock/bond mutual funds	$	23.0	$	—	$	—		$	23.0
NYMEX/ICE natural gas contracts		58.9		—		(58.9	)		—
Total	$	81.9	$	—	$	(58.9	)	$	23.0

36

 

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,
	2023			2022			2023			2022
Spire
Service cost – benefits earned during the period	$	3.9		$	5.4		$	8.0		$	10.8
Interest cost on projected benefit obligation		5.9			5.3			12.3			10.4
Expected return on plan assets		(5.7	)		(8.2	)		(12.1	)		(16.4	)
Amortization of prior service credit		(1.2	)		(1.2	)		(2.3	)		(2.3	)
Amortization of actuarial loss		1.6			3.6			3.2			7.3
Loss on lump-sum settlements		—			11.7			8.6			11.7
Subtotal		4.5			16.6			17.7			21.5
Regulatory adjustment		10.4			(1.2	)		12.2			9.4
Net pension cost	$	14.9		$	15.4		$	29.9		$	30.9
Spire Missouri
Service cost – benefits earned during the period	$	2.9		$	3.8		$	5.7		$	7.7
Interest cost on projected benefit obligation		4.4			3.6			8.9			7.1
Expected return on plan assets		(4.5	)		(5.9	)		(9.0	)		(11.9	)
Amortization of prior service credit		(0.5	)		(0.5	)		(1.0	)		(1.0	)
Amortization of actuarial loss		1.6			2.8			3.1			5.6
Loss on lump-sum settlements		—			6.8			—			6.8
Subtotal		3.9			10.6			7.7			14.3
Regulatory adjustment		8.1			1.1			16.2			9.6
Net pension cost	$	12.0		$	11.7		$	23.9		$	23.9
Spire Alabama
Service cost – benefits earned during the period	$	0.8		$	1.3		$	1.9		$	2.7
Interest cost on projected benefit obligation		0.8			1.2			2.1			2.3
Expected return on plan assets		(0.5	)		(1.4	)		(1.6	)		(2.8	)
Amortization of prior service credit		(0.6	)		(0.6	)		(1.2	)		(1.2	)
Amortization of actuarial loss		0.2			0.8			0.3			1.7
Loss on lump-sum settlements		—			4.9			8.6			4.9
Subtotal		0.7			6.2			10.1			7.6
Regulatory adjustment		2.1			(2.5	)		(4.4	)		(0.6	)
Net pension cost	$	2.8		$	3.7		$	5.7		$	7.0

37

 

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, 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 settlement resulted in a loss of $8.6 for Spire Alabama. For the remeasurement, the discount rate for both of the Spire Alabama plans was updated to 5.6%, from 5.7% for one plan and 5.65% for the other plan, at September 30, 2022. 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. 

For the three and six months ended March 31, 2022, one Spire Missouri plan and two Spire Alabama plans met the criteria for settlement recognition. The lump-sum payments recognized as settlements for the remeasurement were $21.6 for the Spire Missouri plan and $17.4 for the Spire Alabama plans. The lump-sum settlement resulted in losses of $6.8 and $4.9 for Spire Missouri and Spire Alabama, respectively. For the remeasurement, the discount rate for the Spire Missouri plan was updated to 3.6% from 3.0% at September 30, 2021, and the discount rate for the Spire Alabama plans were updated to 3.6% from 3.0% for the first plan and 3.1% for the second plan at September 30, 2021. 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, 12.3 years for the one plan and 12.6 years for the second plan. Therefore, no lump sum settlement expense was recorded in the period ended March 31, 2022.

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. 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.

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 2023 contributions to Spire Missouri’s pension plans through March 31, 2023 were $23.2 to the qualified trusts and none to non-qualified plans. Fiscal 2023 contributions to the Spire Alabama pension plans through March 31, 2023 were $0.8. Contributions to the qualified trusts of Spire Missouri’s pension plans for the remainder of fiscal 2023 are anticipated to be $21.3. Contributions to Spire Alabama’s pension plans for the remainder of fiscal 2023 are anticipated to be $13.0.

38

 

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,
	2023			2022			2023			2022
Spire
Service cost – benefits earned during the period	$	1.2		$	2.0		$	2.4		$	3.9
Interest cost on accumulated postretirement benefit obligation		2.2			1.5			4.3			3.0
Expected return on plan assets		(3.9	)		(4.3	)		(7.8	)		(8.5	)
Amortization of prior service cost		—			0.2			0.1			0.5
Amortization of actuarial gain		(1.1	)		(0.6	)		(2.1	)		(1.2	)
Subtotal		(1.6	)		(1.2	)		(3.1	)		(2.3	)
Regulatory adjustment		0.2			0.1			0.3			3.3
Net postretirement benefit (income) cost	$	(1.4	)	$	(1.1	)	$	(2.8	)	$	1.0
Spire Missouri
Service cost – benefits earned during the period	$	1.0		$	1.6		$	2.0		$	3.2
Interest cost on accumulated postretirement benefit obligation		1.7			1.1			3.3			2.2
Expected return on plan assets		(2.7	)		(2.9	)		(5.3	)		(5.7	)
Amortization of prior service cost		0.1			0.2			0.3			0.4
Amortization of actuarial gain		(0.8	)		(0.5	)		(1.6	)		(1.0	)
Subtotal		(0.7	)		(0.5	)		(1.3	)		(0.9	)
Regulatory adjustment		0.7			0.5			1.3			4.1
Net postretirement benefit cost	$	—		$	—		$	—		$	3.2
Spire Alabama
Service cost – benefits earned during the period	$	0.1		$	0.3		$	0.3		$	0.6
Interest cost on accumulated postretirement benefit obligation		0.5			0.3			0.9			0.7
Expected return on plan assets		(1.3	)		(1.3	)		(2.5	)		(2.6	)
Amortization of prior service (credit) cost		(0.1	)		—			(0.2	)		0.1
Amortization of actuarial gain		(0.2	)		—			(0.3	)		—
Subtotal		(1.0	)		(0.7	)		(1.8	)		(1.2	)
Regulatory adjustment		(0.4	)		(0.4	)		(0.9	)		(0.9	)
Net postretirement benefit income	$	(1.4	)	$	(1.1	)	$	(2.7	)	$	(2.1	)

39

 

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.

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, 2023 for Spire Missouri or Spire Alabama, and none are expected to be required for the remainder of the fiscal year.

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 STL Pipeline, a subsidiary of Spire providing interstate natural gas pipeline transportation services, and Spire Storage, a subsidiary of Spire providing interstate natural gas storage services. 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, sales of natural gas from Spire Missouri to Spire Marketing, propane transportation services provided by Spire NGL Inc. to Spire Missouri, and natural gas transportation services provided by Spire STL Pipeline to Spire Missouri.

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.

40

 

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Three Months Ended March 31, 2023
Operating Revenues:
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
Operating Expenses:
Natural gas		543.3		51.5		—		—			(8.3	)		586.5
Operation and maintenance		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
Total Operating Expenses		803.2		58.2		9.0		5.0			(12.3	)		863.1
Operating Income (Loss)	$	251.3	$	2.4	$	7.5	$	(0.9	)	$	—		$	260.3
Net Economic Earnings (Loss)	$	183.9	$	21.8	$	4.2	$	(10.7	)	$	—		$	199.2

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Three Months Ended March 31, 2022
Operating Revenues:
Revenues from external customers	$	817.4	$	59.4	$	4.0	$	0.1		$	—		$	880.9
Intersegment revenues		—		—		9.8		4.2			(14.0	)		—
Total Operating Revenues		817.4		59.4		13.8		4.3			(14.0	)		880.9
Operating Expenses:
Natural gas		356.0		45.8		—		—			(9.8	)		392.0
Operation and maintenance		104.2		3.2		5.8		4.2			(4.2	)		113.2
Depreciation and amortization		56.5		0.4		1.9		0.1			—			58.9
Taxes, other than income taxes		70.3		0.4		0.9		—			—			71.6
Total Operating Expenses		587.0		49.8		8.6		4.3			(14.0	)		635.7
Operating Income	$	230.4	$	9.6	$	5.2	$	—		$	—		$	245.2
Net Economic Earnings (Loss)	$	169.2	$	14.4	$	3.0	$	(5.6	)	$	—		$	181.0

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	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Six Months Ended March 31, 2023
Operating Revenues:
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
Operating Expenses:
Natural gas		944.9		77.5		—		—			(16.7	)		1,005.7
Operation and maintenance		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
Total Operating Expenses		1,434.3		90.9		17.1		9.2			(24.6	)		1,526.9
Operating Income (Loss)	$	353.2	$	43.8	$	14.6	$	(1.1	)	$	—		$	410.5
Net Economic Earnings (Loss)	$	246.8	$	47.5	$	8.0	$	(18.0	)	$	—		$	284.3

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Six Months Ended March 31, 2022
Operating Revenues:
Revenues from external customers	$	1,320.9	$	107.3	$	7.8	$	0.3		$	—		$	1,436.3
Intersegment revenues		—		—		18.9		7.7			(26.6	)		—
Total Operating Revenues		1,320.9		107.3		26.7		8.0			(26.6	)		1,436.3
Operating Expenses:
Natural gas		566.2		93.8		—		—			(18.8	)		641.2
Operation and maintenance		211.5		5.9		11.6		8.4			(7.8	)		229.6
Depreciation and amortization		111.1		0.7		3.8		0.2			—			115.8
Taxes, other than income taxes		107.3		0.4		1.5		—			—			109.2
Total Operating Expenses		996.1		100.8		16.9		8.6			(26.6	)		1,095.8
Operating Income (Loss)	$	324.8	$	6.5	$	9.8	$	(0.6	)	$	—		$	340.5
Net Economic Earnings (Loss)	$	236.4	$	14.9	$	5.5	$	(13.2	)	$	—		$	243.6

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

	Three Months Ended March 31,						Six Months Ended March 31,
	2023			2022			2023			2022
Net Income	$	179.2		$	173.6		$	270.2		$	229.3
Adjustments, pre-tax:
Fair value and timing adjustments		26.6			9.9			18.8			13.6
Income tax adjustments		(6.6	)		(2.5	)		(4.7	)		0.7
Net Economic Earnings	$	199.2		$	181.0		$	284.3		$	243.6

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

	March 31,			September 30,			March 31,
	2023			2022			2022
Total Assets:
Gas Utility	$	8,317.6		$	8,042.8		$	7,684.1
Gas Marketing		335.0			638.7			431.1
Midstream		506.2			446.0			420.3
Other		1,959.1			2,449.2			2,123.5
Eliminations		(1,068.9	)		(1,493.0	)		(1,257.7	)
Total Assets	$	10,049.0		$	10,083.7		$	9,401.3

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, 2023, are estimated at $1,551.7, $1,133.0, and $233.4 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 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, 2023, the remaining unfunded commitment was $7.7.

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.

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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.

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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, and it is possible that final settlement amounts may materially differ from the current estimate.

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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 (including as a result of a failure of the Spire STL Pipeline to retain its permanent Certificate of Public Convenience and Necessity from the FERC due to any appeal related to the FERC's December 15, 2022 order granting such certificate or as a result of any related regulatory uncertainty), 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

Certain information is presented by reportable segment, as described below. Effective during the first quarter of fiscal 2023, the Company changed its reportable segments to reflect changes in the way its chief operating decision maker evaluates the performance of its operations, develops strategy and allocates capital resources. Specifically, Midstream, which was formerly included in Other is now reported separately. The Company's historical segment disclosures have been recast to be consistent with the current presentation.

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”) and Spire STL Pipeline LLC (“Spire STL Pipeline”). Spire STL Pipeline is a wholly owned subsidiary of Spire which 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. Spire STL Pipeline’s operating revenue is derived primarily from Spire Missouri as its foundation shipper. Spire Storage is engaged in the storage of natural gas in both the western and midcontinent regions of the United States. The storage facility located in Wyoming consists of two storage fields operating under one FERC market-based rate tariff, while the storage facility located in Oklahoma, acquired on April 1, 2023, 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, 2023

This section contains discussion and analysis of the results for the three months ended March 31, 2023 compared to the results for the three months ended March 31, 2022, in total and by registrant and segment. 

Spire

Net Income and Net Economic Earnings

The Company reported net income growth of $5.6 and net economic earnings growth of $18.2, reflecting improved results across all segments in the quarter.

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, 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
Three Months Ended March 31, 2022
Net Income (Loss) [GAAP]	$	169.2		$	7.0		$	3.0	$	(5.6	)	$	173.6		$	3.27
Adjustments, pre-tax:
Fair value and timing adjustments		—			9.9			—		—			9.9			0.20
Income tax adjustments*		—			(2.5	)		—		—			(2.5	)		(0.05	)
Net Economic Earnings (Loss) [Non-GAAP]	$	169.2		$	14.4		$	3.0	$	(5.6	)	$	181.0		$	3.42

*      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, 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
Three Months Ended March 31, 2022
Operating Income [GAAP]	$	230.4		$	9.6		$	5.2	$	—		$	—		$	245.2
Operation and maintenance expenses		104.2			3.2			5.8		4.2			(4.2	)		113.2
Depreciation and amortization		56.5			0.4			1.9		0.1			—			58.9
Taxes, other than income taxes		70.3			0.4			0.9		—			—			71.6
Less: Gross receipts tax expense		(51.9	)		—			—		—			—			(51.9	)
Contribution Margin [Non-GAAP]		409.5			13.6			13.8		4.3			(4.2	)		437.0
Natural gas costs		356.0			45.8			—		—			(9.8	)		392.0
Gross receipts tax expense		51.9			—			—		—			—			51.9
Operating Revenues	$	817.4		$	59.4		$	13.8	$	4.3		$	(14.0	)	$	880.9

51

Select variances for the quarter ended March 31, 2023 compared to the quarter ended March 31, 2022 are summarized in the following table and discussed below.

	Gas		Gas					Other, Net of
Variances: Fiscal 2023 Versus Fiscal 2022	Utility		Marketing			Midstream		Eliminations			Consolidated
Net Income	$	14.3	$	(4.8	)	$	1.2	$	(5.1	)	$	5.6
Net Economic Earnings [Non-GAAP]		14.7		7.4			1.2		(5.1	)		18.2
Operating Revenues		237.1		1.2			2.7		1.5			242.5
Contribution Margin [Non-GAAP]		41.7		(4.7	)		2.7		(0.0	)		39.7
Operation and Maintenance Expenses		15.1		2.5			0.4		0.9			18.9
Interest Expense												19.7
Other Income												10.4
Income Tax												0.2

The increase in interest expense reflects the significant increase in short-term interest rates and higher debt levels versus the prior year. Current year weighted-average short-term debt increased, driven by timing of gas cost recoveries, and weighted-average short-term interest rates were 5.03% in the current-year quarter, versus 0.56% in the prior-year quarter.

After removing the impact of the Non-Service Cost Postretirement Benefit Transfer (“NSC Transfer”) of $2.8, other income increased $7.6. This increase was primarily the result of favorable inventory carrying cost credits and mark-to-market valuations on unqualified retirement trusts at Spire Missouri.

The change in income taxes reflects slightly favorable income mix. Removing this impact, the change in income taxes is in line with the change in pre-tax book income.

Gas Utility

For the quarter ended March 31, 2023, Gas Utility net income was $14.3 higher than the prior-year period, driven by $13.9 growth at Spire Missouri. Net economic earnings in the current year was $14.7 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 Missouri and Spire Alabama – Higher PGA/GSA rates (gas cost recovery)	$	219.2
Spire Missouri – 2022 rate order		36.2
Spire Alabama – RSE adjustments, net		7.9
Spire EnergySouth		3.1
Spire Missouri and Spire Alabama – Volumetric usage (net of weather mitigation)		(32.6	)
All other factors		3.3
Total Variation	$	237.1

The primary driver of revenue growth was $219.2 in higher gas cost recoveries in the current year reflecting the higher average gas costs being passed through to customers, and a $36.2 increase from Spire Missouri resulting from the impact of implementing the 2022 rate order. The current-year quarter also benefited from Spire Alabama's favorable RSE adjustments of $7.9 and an increase of $3.1 at Spire EnergySouth. These favorable impacts were partly offset by lower volumetric usage (net of weather mitigation) totaling $32.6 across Spire Missouri and Spire Alabama.

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

Spire Missouri – 2022 rate order	$	36.2
Spire Alabama – RSE adjustments, net		6.4
Spire EnergySouth		3.2
Spire Missouri and Spire Alabama – Volumetric usage (net of weather mitigation)		(5.0	)
All other factors		0.9
Total Variation	$	41.7

Contribution margin growth versus the prior year was primarily driven by the previously mentioned $36.2 increase from the impact of the Spire Missouri 2022 rate order, $6.4 from favorable rate adjustments within the RSE framework at Spire Alabama, and gains of $3.2 at Spire EnergySouth. 

O&M expenses for the three months ended March 31, 2023, were $15.1 higher than the prior year. Run-rate expenses increased $12.4 after removing the $2.7 impact of the NSC Transfer. The Gas Utility segment O&M increase reflects approximately $6.0 due to the change in treatment of Spire Missouri general overheads that were being deferred in the prior-year period, higher non-employee operations expense of $5.8 and higher bad debts expense of $2.9. These unfavorable impacts were only partly offset by lower employee-related expenses and favorable insurance expense.

Taxes, other than income taxes, increased $10.1, and were driven by $8.1 in higher pass-through gross receipts taxes, along with higher property taxes resulting from the continued infrastructure build-out by the Utilities. Depreciation and amortization expenses for the quarter ended March 31, 2023 were $3.7 higher than the same period in the prior year primarily driven by continued infrastructure capital expenditures across all the Utilities.

Gas Marketing

Net economic earnings reflect the strong operating results experienced in the current-year quarter, driven by favorable market conditions that allowed the business to take advantage of regional basis differentials to optimize storage and transportation positions, only slightly offset by higher O&M costs from associated higher employee-related costs. Net income reflected these same variance drivers, as well as the unfavorable quarter-over-quarter mark-to-market activity on open derivative contracts.

Midstream

Net income and net economic earnings for the Company’s Midstream segment increased $1.2 for the quarter ended March 31, 2023 versus the prior-year quarter, primarily attributable to Spire Storage, reflecting optimized operational and withdrawal commitments. The $2.7 increase in revenues and contribution margin reflect the optimization activity at Spire Storage. Operating expenses across the segment were in line with the prior-year quarter.

Other

The Company’s other activities generated a $10.7 loss in the three months ended March 31, 2023, $5.1 higher than the prior-year quarter. The larger current-year loss was driven by $3.8 higher interest expense in the current year, reflecting both higher borrowings and interest rates, combined with higher corporate costs.

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Spire Missouri

	Three Months Ended March 31,
	2023			2022
Operating Income [GAAP]	$	147.5		$	130.2
Operation and maintenance expenses		77.4			64.3
Depreciation and amortization		39.2			35.9
Taxes, other than income taxes		61.2			53.0
Less: Gross receipts tax expense		(45.6	)		(39.0	)
Contribution Margin [Non-GAAP]		279.7			244.4
Natural gas costs		465.7			287.8
Gross receipts tax expense		45.6			39.0
Operating Revenues	$	791.0		$	571.2
Net Income	$	112.1		$	98.2

Revenues for the quarter ended March 31, 2023 were $219.8 higher than the comparable prior-year period. A key driver was an increase in gas recovery costs totaling $184.0. Further, $36.2 of the increase was attributable to fiscal 2023 results including the impact of the implementation of the 2022 rate order. Higher gross receipts taxes contributed a $6.6 increase. These revenue growth drivers were only partially offset by lower off-system sales of $6.8.

Contribution margin for the three months ended March 31, 2023, increased $35.3 from the same period in the prior year, largely as a result of the previously mentioned timing of the 2022 rate case implementation generating $36.2 incremental contribution.

Reported O&M expenses for the current-year quarter increased $13.1 versus the prior year. Run-rate expenses increased $10.8 after removing the $2.3 impact of the NSC Transfer. The increase was largely due to $6.0 of general overheads that were previously deferred and were not reflected in rates collected during the current year. The increase also reflects higher non-employee operations expense of $4.8 and higher bad debts expense of $2.7, partly offset by lower employee-related expenses and favorable insurance expense. 

Depreciation and amortization expenses increased $3.3 versus the prior-year quarter due to ongoing capital investments. Taxes, other than income taxes, increased $8.2, driven by the higher pass-through gross receipts taxes of $6.6, combined with higher property taxes resulting from the continued infrastructure build-out. 

Other income improved by $6.0 after removing the $2.3 impact due to the NSC Transfer. This variance is primarily attributable to increased inventory carrying cost credits and, to a lesser extent, mark-to-market valuations on unqualified retirement trusts. Interest expense increased $10.4, reflecting higher short-term interest rates in the current year and the $400 in long-term debt that was issued early in the current-year second quarter.

Resulting net income for the quarter ended March 31, 2023 represents a $13.9 increase in results versus the prior-year quarter.

Degree days in Spire Missouri’s service areas during the three months ended March 31, 2023, were 13.7% warmer than normal, and 14.4% warmer than the same period last year. Spire Missouri’s total system volume sold and transported were 657.8 million centum (Latin for “hundred”) cubic feet (CCF) for the quarter, compared with 765.5 million CCF for the same period in the prior year. Total off-system volume sold and transported were 1.2 million CCF for the current-year quarter, compared with 14.4 million CCF a year ago.

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Spire Alabama

	Three Months Ended March 31,
	2023			2022
Operating Income [GAAP]	$	88.9		$	87.9
Operation and maintenance expenses		34.5			32.9
Depreciation and amortization		17.0			16.7
Taxes, other than income taxes		16.1			14.5
Less: Gross receipts tax expense		(12.6	)		(11.3	)
Contribution Margin [Non-GAAP]		143.9			140.7
Natural gas costs		61.8			52.1
Gross receipts tax expense		12.6			11.3
Operating Revenues	$	218.3		$	204.1
Net Income	$	60.0		$	62.4

Operating revenues for the three months ended March 31, 2023 increased $14.2 from the same period in the prior year. The change in operating revenue was principally due to $35.2 higher gas recovery costs, and net favorable regulatory adjustments of $7.9 under the RSE framework, and an increase in off-system sales totaling $1.1. These favorable impacts were only partly offset by the $31.0 decrease attributable to unfavorable weather/usage impacts.

Contribution margin was $3.2 higher versus the prior-year quarter, primarily driven by $6.4 favorable net rate adjustments under the RSE mechanism, slightly offset by $3.4 unfavorable weather/usage variance after weather mitigation.

O&M expenses for the three months ended March 31, 2023 increased $1.6 versus the prior-year quarter, $1.4 after removing the NSC Transfer variance versus the prior-year quarter. The increase was primarily due to higher non-employee operating expenses that were only partly offset by lower employee-related expenses.

Depreciation and amortization expenses were up $0.3, the result of continued investment in infrastructure upgrades. Interest expense for the current-year quarter increased $4.3 versus the prior-year quarter, the result of significantly higher short-term interest rates and to a lesser extent, higher levels of long-term debt.

For the quarter ended March 31, 2023, resulting net income decreased $2.4 versus the prior-year quarter.

As measured in degree days, temperatures in Spire Alabama’s service area during the three months ended March 31, 2023, were 26.3% warmer than normal and 12.4% warmer than a year ago. Spire Alabama’s total system volume sold and transported were 295.6 million CCF for the three months ended March 31, 2023, compared with 319.7 million CCF for the same period in the prior year. Total off-system volume sold and transported were 13.4 million CCF for the quarter, compared with nominal off-system volume sold and transported in last year's second quarter.

EARNINGS – SIX MONTHS ENDED March 31, 2023

This section contains discussion and analysis of the results for the six months ended March 31, 2023 compared to the results for the six months ended March 31, 2022, in total and by registrant and segment. 

Spire

Net Income and Net Economic Earnings

The Company reported net income growth of $40.9 and net economic earnings growth of $40.7, reflecting improved results across all segments.

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

55

	Gas Utility			Gas Marketing			Midstream		Other			Total			Per Diluted Common Share**
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
Six Months Ended March 31, 2022
Net Income (Loss) [GAAP]	$	232.3		$	4.7		$	5.5	$	(13.2	)	$	229.3		$	4.28
Adjustments, pre-tax:
Fair value and timing adjustments		—			13.6			—		—			13.6			0.27
Income tax effect of adjustments*		4.1			(3.4	)		—		—			0.7			0.01
Net Economic Earnings (Loss) [Non-GAAP]	$	236.4		$	14.9		$	5.5	$	(13.2	)	$	243.6		$	4.56

*      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, and for fiscal 2022, include a $4.1 Spire Missouri regulatory adjustment.

**    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.

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, 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
Six Months Ended March 31, 2022
Operating Income (Loss) [GAAP]	$	324.8		$	6.5		$	9.8	$	(0.6	)	$	—		$	340.5
Operation and maintenance expenses		211.5			5.9			11.6		8.4			(7.8	)		229.6
Depreciation and amortization		111.1			0.7			3.8		0.2			—			115.8
Taxes, other than income taxes		107.3			0.4			1.5		—			—			109.2
Less: Gross receipts tax expense		(73.6	)		(0.2	)		—		—			—			(73.8	)
Contribution Margin [Non-GAAP]		681.1			13.3			26.7		8.0			(7.8	)		721.3
Natural gas costs		566.2			93.8			—		—			(18.8	)		641.2
Gross receipts tax expense		73.6			0.2			—		—			—			73.8
Operating Revenues	$	1,320.9		$	107.3		$	26.7	$	8.0		$	(26.6	)	$	1,436.3

56

Select variances for the  six months ended March 31, 2023 compared to the  six months ended March 31, 2022 are summarized in the following table and discussed below.

	Gas		Gas				Other, Net of
Variances: Fiscal 2023 Versus Fiscal 2022	Utility		Marketing		Midstream		Eliminations			Consolidated
Net Income	$	14.1	$	29.1	$	2.5	$	(4.8	)	$	40.9
Net Economic Earnings [Non-GAAP]		10.4		32.6		2.5		(4.8	)		40.7
Operating Revenues		466.6		27.4		5.0		2.1			501.1
Contribution Margin [Non-GAAP]		71.1		43.7		5.0		—			119.8
Operation and Maintenance Expenses		27.7		6.1		0.4		0.4			34.6
Interest Expense											34.7
Other Income											9.0
Income Tax											3.4

The increase in interest expense reflects the significant increase in short-term interest rates and higher debt levels versus the prior year. Current-year weighted-average short-term debt increased over $230, driven by timing of gas cost recoveries, and weighted-average short-term interest rates were 4.7% in the current year, versus 0.5% in the prior year.

The change in other income was $8.2 after removing the impact of the NSC Transfer of $0.8. This increase was primarily the result of increased inventory carrying-cost credits, along with favorable mark-to-market valuations on unqualified retirement trusts at Spire Missouri.

After removing the $4.1 Spire Missouri regulatory charge that was recorded in the prior year, the change in income taxes is consistent with the change in pre-tax book income.

Gas Utility

For the six months ended March 31, 2023, Gas Utility net income was $14.1 higher than the prior-year period, as the $5.4 decrease experienced by Spire Alabama was more than offset by the $15.9 and $3.6 growth at Spire Missouri and Spire EnergySouth, respectively. Net economic earnings in the current year was $10.4 higher than the prior year, which tracks the net income trend after removing the Spire Missouri $4.1 GAAP regulatory adjustment in the prior-year period. These results are described in further detail below.

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

Spire Missouri and Spire Alabama – Higher PGA/GSA rates (gas cost recovery)	$	394.3
Spire Missouri – 2021 and 2022 rate case outcomes		54.6
Spire Missouri and Spire Alabama – Higher gross receipts taxes		16.2
Spire EnergySouth		13.5
Spire Alabama – RSE adjustments, net		9.4
Spire Alabama – Volumetric usage (net of weather mitigation)		(25.3	)
All other factors		3.9
Total Variation	$	466.6

The primary driver of revenue growth in the current year-to-date results was $394.3 in higher gas cost recoveries at the utilities of Spire Missouri and Spire Alabama in the current year, reflecting higher average gas costs being passed through to customers. The current year also benefited from a $54.6 increase at Spire Missouri resulting from the current-year impacts of implementing the 2022 and 2021 rate orders. The current year-to-date results also benefited from higher gross receipts taxes of $16.2 at Spire Missouri and Spire Alabama, growth of $13.5 at Spire EnergySouth, and $9.4 at Spire Alabama, reflecting favorable rate adjustments within the RSE framework. These favorable impacts were only partly offset by an unfavorable volumetric usage impact (net of weather mitigation) totaling $25.3 at Spire Alabama.

57

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

Spire Missouri – 2021 and 2022 rate case outcomes	$	54.6
Spire Alabama – Rate adjustment under RSE mechanism, net		7.8
Spire EnergySouth		6.1
All other factors		2.6
Total Variation	$	71.1

Year-to-date contribution margin growth was primarily driven by the $54.6 increase from the Spire Missouri 2022 and 2021 rate order implementations, $7.8 from favorable rate adjustments within the RSE framework at Spire Alabama, and a $6.1 increase at Spire EnergySouth.

O&M expenses for the six months ended March 31, 2023, were $27.7 higher than the prior year. Run-rate expenses increased $27.0 after removing the $0.7 impact of the NSC Transfer. The Gas Utility segment O&M increase reflects higher non-employee operations expense of $12.1, approximately $12 due to the change in treatment of Spire Missouri general overheads that were being deferred in the prior-year period, and higher bad debts expense of $5.5. These impacts were only partly offset by favorable insurance expense and lower employee-related expenses.

Taxes, other than income taxes, increased $23.0, and were driven by $16.8 in higher pass-through gross receipts taxes, along with higher property taxes resulting from the continued infrastructure build-out by the Utilities. Depreciation and amortization expenses for the first half of fiscal 2023 were $8.8 higher than the same period in the prior year primarily driven by continued infrastructure capital expenditures across all the Utilities.

Gas Marketing

Net income and net economic earnings reflect the strong operating results experienced in the current-year, driven by favorable market conditions that allowed the business to take advantage of regional basis differentials to optimize storage and transportation positions, only slightly offset by higher O&M costs associated with higher employee-related expenses. 

Midstream

Net income and net economic earnings for the Company’s Midstream segment increased $2.5 for the year-to-date ended March 31, 2023 versus the prior-year period. Of this increase, $2.4 was attributable to Spire Storage, reflecting optimized operational and withdrawal commitments. The $5.0 increase in revenues and contribution margin reflect the optimization activity at Spire Storage. Operating expenses across the segment were in-line with the prior-year-to-date period.

Other

The Company’s other activities generated a $18.0 loss in the six months ended March 31, 2023, $4.8 higher than the prior-year corresponding period. The larger current-year loss was driven by $7.2 higher interest expense, reflecting both higher borrowings and interest rates, and higher corporate costs, offset partly by lower income tax expense.

58

Spire Missouri

	Six Months Ended March 31,
	2023			2022
Operating Income [GAAP]	$	219.9		$	195.6
Operation and maintenance expenses		154.5			130.6
Depreciation and amortization		77.8			70.1
Taxes, other than income taxes		97.6			78.7
Less: Gross receipts tax expense		(67.7	)		(53.9	)
Contribution Margin [Non-GAAP]		482.1			421.1
Natural gas costs		782.4			444.1
Gross receipts tax expense		67.7			53.9
Operating Revenues	$	1,332.2		$	919.1
Net Income	$	159.4		$	143.5

Revenues for the six months ended March 31, 2023 were $413.1 higher than the comparable prior-year period. A key driver was an increase in gas recovery costs totaling $343.9. Further, $54.6 of the increase was attributable to fiscal 2023 results including the cumulative impacts of the implementation of the 2022 and 2021 rate orders. Higher gross receipts taxes contributed a $13.8 increase, and volume (net of weather mitigation) contributing $5.0 growth. These revenues growth drivers were only partially offset by lower off-system sales of $6.3.

Contribution margin for the six months ended March 31, 2023 increased $61.0 from the same period in the prior year, largely as a result of the previously mentioned timing of the 2022 and 2021 rate case implementations generating $54.6 incremental contribution, combined with favorable volumetric impacts of $5.0.

Reported O&M expenses for the current year-to-date period increased $23.9 versus the prior year. Run-rate expenses increased $23.5 after removing the $0.4 impact of the NSC Transfer. The increase was largely due to approximately $12 of general overheads that were previously deferred and were not reflected in rates collected during the current year. The increase also reflects higher non-employee operations expense of $10.4 and higher bad debts expense of $4.3, partly offset by lower employee-related expenses and favorable insurance expense in the current year. 

Other income was higher by $7.0, after removing the $0.4 expense due to the NSC Transfer. This variance is primarily attributable to increased inventory carrying cost credits, combined with favorable mark-to-market valuations on unqualified retirement trusts. Interest expense increased $17.9, primarily reflecting higher short-term interest rates and net long-term debt issuances in the current year.

Resulting net income for the six months ended March 31, 2023 represents a $15.9 increase versus the prior-year period.

Degree days in Spire Missouri’s service areas during the six months ended March 31, 2023 were 8.5% warmer than normal, but 1.7% colder than the same period last year. Spire Missouri’s total system volume sold and transported were 1,215.9 million CCF for the first half of this year, compared with 1,196.5 million CCF for the same period in the prior year. Total off-system volume sold and transported were 3.9 million CCF for the current year, compared with 16.5 million CCF a year ago.

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Spire Alabama

	Six Months Ended March 31,
	2023			2022
Operating Income [GAAP]	$	109.2		$	109.0
Operation and maintenance expenses		69.6			67.4
Depreciation and amortization		34.0			33.2
Taxes, other than income taxes		26.7			23.5
Less: Gross receipts tax expense		(19.4	)		(17.0	)
Contribution Margin [Non-GAAP]		220.1			216.1
Natural gas costs		131.2			97.6
Gross receipts tax expense		19.4			17.0
Operating Revenues	$	370.7		$	330.7
Net Income	$	69.2		$	74.6

Revenues for the six months ended March 31, 2023 were $40.0 higher than the comparable prior-year period. A key driver was an increase in gas recovery costs totaling $50.4. Further, $9.4 of the increase was attributable to fiscal 2023 results including favorable adjustments under the RSE framework. Revenue in the current year also benefited $5.5 due to the combination of higher off-system sales and gross receipts taxes. These growth drivers were only partially offset by $25.3 unfavorable volume impacts (net of weather mitigation).

Contribution margin for the six months ended March 31, 2023, increased $4.0 from the same period in the prior year, as favorable RSE adjustments of $7.8 more than offset unfavorable volumetric impacts of $4.1.

Reported O&M expenses for the first half of fiscal 2023 increased $2.2 versus the comparable prior-year period. Run-rate expenses increased $2.0 after removing the $0.2 impact of the NSC Transfer. The increase was largely due to higher non-employee operations expense, a $0.7 increase in bad debts expense, partly offset by lower employee-related expenses. 

Depreciation and amortization expenses were up $0.8, the result of continued investment in infrastructure upgrades. Interest expense for the six months ended March 31, 2023 increased $7.5 versus the prior-year period, the result of significantly higher short-term interest rates and, to a lesser extent, higher levels of long-term debt.

For the six months ended March 31, 2023, resulting net income decreased $5.4 versus the prior-year period.

As measured in degree days, temperatures in Spire Alabama’s service area during the six months ended March 31, 2023 , were 22.0% warmer than normal and 10.9% warmer than a year ago. Spire Alabama’s total system volume sold and transported were 547.7 million CCF for the six months ended March 31, 2023 , compared with 572.5 million CCF for the same period in the prior year. Total off-system volume sold and transported were 28.0 million CCF for the first half this year, compared with 0.1 million CCF a year ago.

LIQUIDITY AND CAPITAL RESOURCES

Recent Cash Flows

	Six Months Ended March 31,
Cash Flow Summary	2023			2022
Net cash provided by operating activities	$	179.9		$	155.1
Net cash used in investing activities		(340.7	)		(273.2	)
Net cash provided by financing activities		161.5			122.0

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For the six months ended March 31, 2023, net cash from operating activities improved $24.8 from the corresponding period of fiscal 2022. The key drivers to the favorable change are the $40.9 increase in net income (discussed above), coupled with changes related to regulatory timing and fluctuation in working capital items (as discussed below in the Future Cash Requirements section).

For the six months ended March 31, 2023, net cash used in investing activities was $67.5 greater than for the same period in the prior year. As discussed in Note 1 of the Notes to Financial Statements in Item 1, on March 31, 2023, Spire made an advance payment of the $37.1 preliminary purchase price for the subsequent acquisition of a natural gas storage facility. Total capital expenditures were $31.9 higher than last year, with a $24.1 spending increase in the Utilities, and a $11.7 increase for Spire Storage, partially offset by a $5.3 spending decline at Spire STL Pipeline.

Lastly, for the six months ended March 31, 2023, net cash provided by financing activities increased $39.5 versus the six months ended March 31, 2022. Current-year long-term debt issuances were $755.0, or $455.0 higher than a year ago, and repayments of long-term debt in the current period declined $24.6 compared to the prior-year period. Offsetting a substantial portion of the higher net long-term debt issuances was a $411.6 net increase in repayments of short-term debt. Cash from the issuance of common stock in the current-year period was $3.6, a decline of $20.4 from the comparative period; see the discussion regarding Spire's forward sales of stock under its ATM program in Note 4 of the Notes to Financial Statements in Item 1. Finally, dividends paid on common stock rose $4.4 in the first half of fiscal 2023 compared to the first half of fiscal 2022.

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 storage 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, 2023, are related to capital expenditures, principal and interest payments on long-term debt, natural gas purchase obligations, and dividends. Except for the issuance of debt described in Note 6 of the Notes to Financial Statements in Item 1, 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, 2022. Total Company capital expenditures are planned to be $700 for fiscal 2023.

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, 2023, the debt ratings of the Company, Spire Missouri and Spire Alabama (shown in the following table) remain at investment grade with a stable outlook (other than Moody’s negative outlook for Spire Missouri debt).

	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

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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, 2023.

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 of the Notes to Financial Statements in Item 1.

Long-term Debt and Equity

At March 31, 2023, including the current portion but excluding unamortized discounts and debt issuance costs, Spire had long-term debt totaling $3,982.7, of which $2,048.0 was issued by Spire Missouri, $750.0 was issued by Spire Alabama, and $229.7 was issued by other subsidiaries. For information about long-term debt issued this fiscal year, see Note 6 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 April 2023, Spire Missouri has issued $40.4 of common stock, a $250.0 term loan, 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 147,414 and 142,290 shares at March 31, 2023 and April 30, 2023, 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.

Spire has an “at-the-market” (ATM) equity distribution agreement, pursuant to which 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). As of March 31, 2023, under this ATM program, Spire may sell additional shares with an aggregate offering price of up to $152.8 under the current Board of Directors authorization expiring May 2025. For additional information about the ATM program, see Note 4 of the Notes to Financial Statements in Item 1.

Taking into account the current portion of long-term debt, the Company’s long-term consolidated capitalization consisted of 43% and 46% equity at March 31, 2023 and September 30, 2022, 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.

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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.

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, 2022, 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, 2023.

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, 2022.

MARKET RISK

There were no material changes in the Company’s commodity price risk or counterparty credit risk as of March 31, 2023, relative to the corresponding information provided in the Company’s Annual Report on Form 10-K for the fiscal year ended September 30, 2022.

At March 31, 2023, the following swaps were outstanding:

•  From the first quarter of fiscal 2021, one swap contract remains outstanding. The remaining outstanding contract is a ten-year interest rate swap that has a notional amount of $50.0 with a fixed interest rate of 1.49180%. The Company recorded a $1.0 mark-to-market loss to accumulated other comprehensive income on the swap for the six months ended March 31, 2023.

•  From the second quarter of 2022, two swap contracts remain outstanding. Both contracts are ten-year interest rate swap contracts; the first swap has a notional amount of $75.o with a fixed interest rate of 1.6475%, while the second swap has a notional amount of $25.0 with a fixed interest rate of 1.746%. The Company recorded a $2.1 mark-to-market loss to accumulated other comprehensive income on these swaps for the six months ended March 31, 2023.

•  From the first quarter of fiscal 2023, one swap contract is outstanding. The remaining outstanding contract is a ten-year interest rate swap that has a notional amount of $50.0 with a fixed interest rate of 3.4480%. The Company recorded a $1.7 mark-to-market loss to accumulated other comprehensive income on this swap for the six months ended March 31, 2023.

•  In the second quarter of fiscal 2023, the Company entered into multiple two-year interest rate swap contracts with a cumulative total notional amount of $100.0 with fixed interest rates ranging from 3.385% to 3.685%. The Company recorded an $0.5 mark-to-market loss to accumulated other comprehensive income on these swaps for the six months ended March 31, 2023.

As of March 31, 2023, the Company has recorded through accumulated other comprehensive income a cumulative mark-to-market net gain of $14.3 on open swaps.

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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, 2023, 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, 2023, 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, 2023, 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, 2022.

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, 2023 – January 31, 2023		63	$	72.11		—		—
February 1, 2023 – February 28, 2023		—		—		—		—
March 1, 2023 – March 31, 2023		129		69.71		—		—
Total		192		70.50		—		—

Spire Missouri’s outstanding first mortgage bonds contain restrictions on its ability to pay cash dividends on its common stock. As of March 31, 2023, 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

None.

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Item 6. Exhibits

Exhibit No.	Description
4.1*	Thirty-Eighth Supplemental Indenture dated as of February 13, 2023 between Spire Missouri Inc. and Regions Bank, as trustee (including Form of 4.800% Series First Mortgage Bond due 2033); filed as Exhibit 4.1 to Spire Inc. and Spire Missouri Inc.'s Current Report on Form 8-K on February 13, 2023.
4.2	Second Supplement to Master Note Purchase Agreement, dated as of March 7, 2023, between Spire Inc. and certain institutional investors (including Form of 5.80% Series 2023 Senior Note, Tranche D, due March 15, 2033).
10.1*	Loan Agreement, dated January 5, 2023, 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 10, 2023.
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, 2023, 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 3, 2023	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 3, 2023	By:	/s/ Timothy W. Krick
			Timothy W. Krick
			Controller and Chief Accounting Officer
			(Authorized Signatory and Chief Accounting Officer)

		Spire Alabama Inc.
Date:	May 3, 2023	By:	/s/ Timothy W. Krick
			Timothy W. Krick
			Chief Accounting Officer
			(Authorized Signatory and Chief Accounting Officer)

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EX-4.2

Exhibit 4.2

Spire Inc.

Second Supplement to Master Note Purchase Agreement

Dated as of March 7, 2023

Re:         $150,000,000 5.80% Series 2023 Senior Notes, Tranche D

due March 15, 2033

Spire Inc.

Dated as of March 7, 2023

To the Purchaser(s) named in

Schedule A hereto

Ladies and Gentlemen:

This Second Supplement to Master Note Purchase Agreement (this “Second Supplement”) is between Spire Inc., a Missouri corporation (the “Company”), and the institutional investors named on Schedule A attached hereto (the “Purchasers”).

Reference is hereby made to that certain Master Note Purchase Agreement dated as of June 20, 2016 (as supplemented pursuant to that certain First Supplement to Master Note Purchase Agreement dated as of March 15, 2017 and as further amended, restated, supplemented or otherwise modified from time to time, the “Note Purchase Agreement”) between the Company and the purchasers listed on Schedule A thereto. All capitalized definitional terms not otherwise defined herein shall have the same meaning as specified in the Note Purchase Agreement. Reference is further made to Section 1.3 of the Note Purchase Agreement which requires that, prior to the delivery of any Additional Notes, the Company and each Additional Purchaser shall execute and deliver a Supplement.

The Company hereby agrees with the Purchaser(s) as follows:

1.         The Company has authorized the issue and sale of $150,000,000 aggregate principal amount of its 5.80% Series 2023 Senior Notes, Tranche D, due March 15, 2033 (the “Series 2023 Notes”). The Series 2023 Notes, together with the Series 2016 Notes initially issued pursuant to the Note Purchase Agreement, the Series 2017 Notes issued pursuant to the First Supplement to Master Note Purchase Agreement and each series of Additional Notes which may from time to time hereafter be issued pursuant to the provisions of Section 1.3 of the Note Purchase Agreement, are collectively referred to as the “Notes” (such term shall also include any such notes issued in substitution therefor pursuant to Section 13 of the Note Purchase Agreement). The Series 2023 Notes shall be substantially in the form set out in Exhibit 1 hereto with such changes therefrom, if any, as may be approved by the Purchaser(s) and the Company.

2.         Subject to the terms and conditions hereof and as set forth in the Note Purchase Agreement and on the basis of the representations and warranties hereinafter set forth, the Company agrees to issue and sell to each Purchaser, and each Purchaser agrees to purchase from the Company, Series 2023 Notes in the principal amount set forth opposite such Purchaser’s name on Schedule A hereto at a price of 100% of the principal amount thereof on the closing date hereinafter mentioned.

3.         The sale and purchase of the Series 2023 Notes to be purchased by each Purchaser shall occur at the offices of Chapman and Cutler LLP, 320 South Canal Street, Chicago, Illinois 60606, at 10:00 A.M. Chicago time, at a closing (the “Closing”) on March 7, 2023 or on such other Business Day thereafter on or prior to March 7, 2023 as may be agreed upon by the Company and the Purchasers. At the Closing, the Company will deliver to each Purchaser the Series 2023 Notes to be purchased by such Purchaser in the form of a single Series 2023 Note (or such greater number of Series 2023 Notes in denominations of at least $250,000 as such Purchaser may request) dated the date of the Closing and registered in such Purchaser’s name (or in the name of such Purchaser’s nominee), against delivery by such Purchaser to the Company or its order of immediately available funds in the amount of the purchase price therefor by wire transfer of immediately available funds for the account of the Company, with wire instructions to be provided by the Company to the Purchaser at least three Business Days prior to the Closing date in accordance with Section 4. If, at the Closing, the Company shall fail to tender such Series 2023 Notes to any Purchaser as provided above in this Section 3, or any of the conditions specified in Section 4 shall not have been fulfilled to any Purchaser’s satisfaction, such Purchaser shall, at such Purchaser’s election, be relieved of all further obligations under this Second Supplement, without thereby waiving any rights such Purchaser may have by reason of such failure or such nonfulfillment.

4.         Each Purchaser’s obligation to purchase and pay for the Series 2023 Notes to be sold to such Purchaser at the Closing is subject to the fulfillment to such Purchaser’s satisfaction, prior to or at the Closing, of the conditions set forth in Exhibit A hereto.

5.         The obligation of each Purchaser to purchase and pay for the Series 2023 Notes to be sold to such Purchaser at the Closing is subject to the fulfillment to such Purchaser’s satisfaction, prior to the Closing, of the following conditions:

(a)         The representations and warranties set forth in Exhibit B hereto, amend and supersede the representations and warranties set forth in Section 5 of the Note Purchase Agreement. Each of such representations and warranties shall be correct as of the date of Closing and the Company shall have delivered to each Purchaser an Officer’s Certificate, dated the date of the Closing certifying that such condition has been fulfilled.

(b)         The Company shall have consummated the sale of the entire principal amount of the Notes scheduled to be sold at the Closing pursuant to this Second Supplement.

6.         (a) The entire unpaid principal balance of the Series 2023 Notes shall be due and payable on the stated maturity date thereof.

(b)        For the purposes of the Note Purchase Agreement and this Second Supplement, the term “Make‑Whole Amount” means with respect to any Series 2023 Note, an amount equal to the excess, if any, of the Discounted Value of the Remaining Scheduled Payments with respect to the Called Principal of such Series 2023 Note, minus the amount of such Called Principal, provided that the Make‑Whole Amount may in no event be less than zero. For the purposes of determining the Make‑Whole Amount, the following terms have the following meanings with respect to such Series 2023 Note:

2

“Called Principal” means, with respect to any Series 2023 Note, the principal of such Series 2023 Note that is to be prepaid pursuant to Section 8.2 of the Note Purchase Agreement or has become or is declared to be immediately due and payable pursuant to Section 12.1 to the Note Purchase Agreement, as the context requires.

“Discounted Value” means, with respect to the Called Principal of any Series 2023 Note, the amount obtained by discounting all Remaining Scheduled Payments with respect to such Called Principal from their respective scheduled due dates to the Settlement Date with respect to such Called Principal, in accordance with accepted financial practice and at a discount factor (applied on the same periodic basis as that on which interest on the Series 2023 Notes is payable) equal to the Reinvestment Yield with respect to such Called Principal.

“Reinvestment Yield” means, with respect to the Called Principal of any Series 2023 Note, 0.50% over the yield to maturity implied by the yield(s) reported as of 10:00 a.m. (New York City time) on the second Business Day preceding the Settlement Date with respect to such Called Principal, on the display designated as “Page PX1” (or such other display as may replace Page PX1) on Bloomberg Financial Markets for the most recently issued actively traded on‑the‑run U.S. Treasury securities (“Reported”) having a maturity equal to the Remaining Average Life of such Called Principal as of such Settlement Date. If there are no such U.S. Treasury securities Reported having a maturity equal to such Remaining Average Life, then such implied yield to maturity will be determined by (a) converting U.S. Treasury bill quotations to bond equivalent yields in accordance with accepted financial practice and (b) interpolating linearly between the yields Reported for the applicable most recently issued actively traded on‑the‑run U.S. Treasury securities with the maturities (1) closest to and greater than such Remaining Average Life and (2) closest to and less than such Remaining Average Life. The Reinvestment Yield shall be rounded to the number of decimal places as appears in the interest rate of the applicable Note.

If such yields are not Reported or the yields Reported as of such time are not ascertainable (including by way of interpolation), then “Reinvestment Yield” means, with respect to the Called Principal of any Series 2023 Note, 0.50% over the yield to maturity implied by the U.S. Treasury constant maturity yields reported, for the latest day for which such yields have been so reported as of the second Business Day preceding the Settlement Date with respect to such Called Principal, in Federal Reserve Statistical Release H.15 (or any comparable successor publication) for the U.S. Treasury constant maturity having a term equal to the Remaining Average Life of such Called Principal as of such Settlement Date. If there is no such U.S. Treasury constant maturity having a term equal to such Remaining Average Life, such implied yield to maturity will be determined by interpolating linearly between (1) the U.S. Treasury constant maturity so reported with the term closest to and greater than such Remaining Average Life and (2) the U.S. Treasury constant maturity so reported with the term closest to and less than such Remaining Average Life. The Reinvestment Yield shall be rounded to the number of decimal places as appears in the interest rate of the applicable Series 2023 Note.

3

“Remaining Average Life” means, with respect to any Called Principal, the number of years obtained by dividing (i) such Called Principal into (ii) the sum of the products obtained by multiplying (a) the principal component of each Remaining Scheduled Payment with respect to such Called Principal by (b) the number of years, computed on the basis of a 360‑day year composed of twelve 30‑day months and calculated to two decimal places, that will elapse between the Settlement Date with respect to such Called Principal and the scheduled due date of such Remaining Scheduled Payment.

“Remaining Scheduled Payments” means, with respect to the Called Principal of any Series 2023 Note, all payments of such Called Principal and interest thereon that would be due after the Settlement Date with respect to such Called Principal if no payment of such Called Principal were made prior to its scheduled due date, provided that if such Settlement Date is not a date on which interest payments are due to be made under the Series 2023 Notes, then the amount of the next succeeding scheduled interest payment will be reduced by the amount of interest accrued to such Settlement Date and required to be paid on such Settlement Date pursuant to Section 8.4 of the Note Purchase Agreement or Section 12.1 of the Note Purchase Agreement.

“Settlement Date” means, with respect to the Called Principal of any Series 2023 Note, the date on which such Called Principal is to be prepaid pursuant to Section 8.2 of the Note Purchase Agreement or has become or is declared to be immediately due and payable pursuant to Section 12.1 of the Note Purchase Agreement, as the context requires.

(c) For the purposes of the Note Purchase Agreement and this Second Supplement, Section 6.1 of the Note Purchase Agreement is hereby amended to read as follows:

“Section 6.1.   Purchase for Investment. (a) Each Purchaser severally represents that (i) it is an “accredited investor” (as defined in Rule 501(a)(1), (2), (3) or (7) of Regulation D under the Securities Act) and (ii) it is purchasing the Series 2023 Notes for its own account or for one or more separate accounts maintained by such Purchaser or for the account of one or more pension or trust funds and not with a view to the distribution thereof, provided that the disposition of such Purchaser’s or their property shall at all times be within such Purchaser’s or their control. Each Purchaser understands that the Series 2023 Notes have not been registered under the Securities Act and may be resold only if registered pursuant to the provisions of the Securities Act or if an exemption from registration is available, except under circumstances where neither such registration nor such an exemption is required by law, and that the Company is not required to register the Series 2023 Notes.

(b) Each Purchaser severally represents that it (or its investment manager) has received and reviewed the Disclosure Documents and has been furnished an opportunity to obtain any additional information or documents concerning the Company and its Subsidiaries, and their financial condition, operations, business or properties, necessary or desirable to make an informed decision as to an investment in the Notes. Each Purchaser further represents that such Purchaser (or its investment manager) has had the opportunity to ask questions of the Company and received answers concerning the terms and conditions of the sale of the Notes.”

4

(d) For the purposes of the Note Purchase Agreement and this Second Supplement, Section 6.2 of the Note Purchase Agreement is hereby amended to read as follows:

“Section 6.2.   Source of Funds. Each Purchaser severally represents that at least one of the following statements is an accurate representation as to each source of funds (a “Source”) to be used by such Purchaser to pay the purchase price of the Series 2023 Notes to be purchased by such Purchaser hereunder:

(a) the Source is an “insurance company general account” (as the term is defined in the United States Department of Labor’s Prohibited Transaction Exemption (“PTE”) 95-60) in respect of which the reserves and liabilities (as defined by the annual statement for life insurance companies approved by the NAIC (the “NAIC Annual Statement”)) for the general account contract(s) held by or on behalf of any employee benefit plan together with the amount of the reserves and liabilities for the general account contract(s) held by or on behalf of any other employee benefit plans maintained by the same employer (or affiliate thereof as defined in PTE 95-60) or by the same employee organization in the general account do not exceed 10% of the total reserves and liabilities of the general account (exclusive of separate account liabilities) plus surplus as set forth in the NAIC Annual Statement filed with such Purchaser’s state of domicile; or

(b) the Source is a separate account that is maintained solely in connection with such Purchaser’s fixed contractual obligations under which the amounts payable, or credited, to any employee benefit plan (or its related trust) that has any interest in such separate account (or to any participant or beneficiary of such plan (including any annuitant)) are not affected in any manner by the investment performance of the separate account; or

(c) the Source is either (i) an “insurance company pooled separate account”, within the meaning of PTE 90-1 or (ii) a “bank collective investment fund”, within the meaning of the PTE 91-38 and, except as disclosed by such Purchaser to the Company in writing pursuant to this clause (c), no employee benefit plan or group of plans maintained by the same employer or employee organization beneficially owns more than 10% of all assets allocated to such pooled separate account or collective investment fund; or

(d) the Source constitutes assets of an “investment fund” (within the meaning of Part VI of PTE 84-14 (the “QPAM Exemption”)) managed by a “qualified professional asset manager” or “QPAM” (within the meaning of Part VI of the QPAM Exemption), no employee benefit plan’s assets that are managed by the QPAM in such investment fund, when combined with the assets of all other employee benefit plans established or maintained by the same employer or by an affiliate (within the meaning of Part VI(c)(1) of the QPAM Exemption) of such employer or by the same employee organization and managed by such QPAM, represent more than 20% of the total client assets managed by such QPAM, the conditions of Part I(c) and (g) of the QPAM Exemption are satisfied, neither the QPAM nor a Person controlling or controlled by the QPAM maintains an ownership interest in the Company that would cause the QPAM and the Company to be related within the meaning of Part VI(h) of the QPAM Exemption and (i) the identity of such QPAM and (ii) the names of any employee benefit plans whose assets in the investment fund, when combined with the assets of all other employee benefit plans established or maintained by the same employer or by an affiliate (within the meaning of Part VI(c)(1) of the QPAM Exemption) of such employer or by the same employee organization, represent 10% or more of the assets of such investment fund, have been disclosed to the Company in writing pursuant to this clause (d); or

5

(e) the Source constitutes assets of a “plan(s)” (within the meaning of Part IV(h) of PTE 96-23 (the “INHAM Exemption”)) managed by an “in-house asset manager” or “INHAM” (within the meaning of Part IV(a) of the INHAM Exemption), the conditions of Part I(a), (g) and (h) of the INHAM Exemption are satisfied, neither the INHAM nor a Person controlling or controlled by the INHAM (applying the definition of “control” in Part IV(d)(3) of the INHAM Exemption) owns a 10% or more interest in the Company and (i) the identity of such INHAM and (ii) the name(s) of the employee benefit plan(s) whose assets constitute the Source have been disclosed to the Company in writing pursuant to this clause (e); or

(f) the Source is a governmental plan; or

(g) the Source is one or more employee benefit plans, or a separate account or trust fund comprised of one or more employee benefit plans, each of which has been identified to the Company in writing pursuant to this clause (g); or

(h) the Source does not include assets of any employee benefit plan, other than a plan exempt from the coverage of ERISA.

As used in this Section 6.2, the terms “employee benefit plan,” “governmental plan,” and “separate account” shall have the respective meanings assigned to such terms in section 3 of ERISA.”

(e) For the purposes of the Note Purchase Agreement and this Second Supplement, the terms below have the following meaning with respect to any holder of a Series 2023 Note:

"Mortgage" means any of the following: (1) Mortgage and Deed of Trust, dated as of February 1, 1945, from Spire Missouri Inc. (formerly known as Laclede Gas Company and, earlier, The Laclede Gas Light Company) to Regions Bank, successor trustee, as amended and supplemented by supplemental indentures and as may be further amended and supplemented from time to time or (2) Amended and Restated Indenture of Mortgage, dated as of September 1, 2011, between Spire Gulf Inc. (formerly known as Mobile Gas Service Corporation) and Regions Bank, as trustee, as amended and supplemented by supplemental indentures and as may be further amended and supplemented from time to time.

“Permitted Liens” means, with respect to any Person, any of the following:

(a)         (i) Liens created pursuant to the Wells Facility (other than as contemplated by (ii) and (iii) below), provided that all obligations of the Company under the Notes shall concurrently be secured equally and ratably with such Indebtedness, (ii) Liens on cash or deposits granted in favor of the Swingline Bank (under the Wells Facility) or the Issuing Bank (under the Wells Facility) to Cash Collateralize (as defined in the Wells Facility) any Defaulting Bank’s (under the Wells Facility) participation in Letters of Credit or Swingline Loans (each under the Wells Facility) and (iii) Liens in favor of the Administrative Agent (as defined in the Wells Facility) with respect to the Cash Collateral Account (as defined in the Wells Facility) and all amounts held therein from time to time as security for Letter of Credit Exposure (as defined in the Wells Facility), and for application to the Company’s Reimbursement Obligations (as defined in the Wells Facility);

6

(b)         Liens for taxes, assessments and other governmental charges or levies (excluding any Lien imposed pursuant to any of the provisions of ERISA or environmental laws) (i) not yet due or as to which the period of grace (not to exceed sixty (60) days), if any, related thereto has not expired or (ii) which are being contested in good faith and by appropriate proceedings if adequate reserves are maintained to the extent required by GAAP;

(c)         Liens in respect of property imposed by law such as materialmen’s, mechanics’, carriers’, warehousemen’s, processors’ or landlords’ and other nonconsensual statutory liens incurred in the ordinary course of business, which (i) are not overdue for a period of more than sixty (60) days, or if more than sixty (60) days overdue, no action has been taken to enforce such Liens or such Liens are being contested in good faith and by appropriate proceedings if adequate reserves are maintained to the extent required by GAAP and (ii) do not, individually or in the aggregate, materially impair the use thereof in the operation of the business of the Company or any of its Subsidiaries;

(d)         Liens arising from good faith performance of bids, tenders, contracts (other than contracts for the payment of money), leases, statutory obligations, surety and appeal bonds, and other obligations of like nature arising in the ordinary course of such Person’s business, including, without limitation, deposits and pledges of funds securing Permitted Commodity Hedging Obligations;

(e)         encumbrances in the nature of zoning restrictions, easements, rights of way or restrictions of record on the use of real property, which in the aggregate do not, in any material respect, impair the use thereof in the ordinary conduct of business;

(f)         Liens arising from the filing of precautionary UCC financing statements relating solely to personal property leased pursuant to operating leases entered into in the ordinary course of business of the Company and its Subsidiaries;

(g)         Liens securing Indebtedness incurred in connection with Capitalized Leases; provided that (i) such Liens shall be created substantially simultaneously with the acquisition, repair, improvement or lease, as applicable, of the related property and (ii) such Liens do not at any time encumber any property other than the property financed by such Indebtedness;

(h)         Liens securing judgments for the payment of money not constituting an Event of Default under Section 11(i) or securing appeal or other surety bonds relating to such judgments;

7

(i)         Liens on property (i) of any Person which are in existence at the time that such Person is acquired pursuant to an Acquisition that constitutes a Permitted Investment and (ii) of the Company or any of its Subsidiaries existing at the time such tangible property or tangible assets are purchased or otherwise acquired by the Company or such Subsidiary thereof pursuant to a transaction permitted pursuant to this Agreement; provided that, with respect to each of the foregoing clauses (i) and (ii), (A) such Liens are not incurred in connection with, or in anticipation of, such Acquisition, purchase or other acquisition, (B) such Liens are not “blanket” or all asset Liens and (C) such Liens do not attach to any other property of the Company or any of its Subsidiaries;

(j)         Liens under the Mortgage;

(k)         (i) Liens of a collecting bank arising in the ordinary course of business under Section 4-210 of the Uniform Commercial Code in effect in the relevant jurisdiction and (ii) Liens of any depositary institution in connection with statutory, common law and contractual rights relating to liens, rights of set‑off, recoupment or similar rights with respect to any deposit account or other fund of the Company or any Subsidiary thereof;

(l)         (i) contractual or statutory Liens of landlords to the extent relating to the property and assets relating to any lease agreements with such landlord, and (ii) contractual Liens of suppliers (including sellers of goods) or customers granted in the ordinary course of business to the extent limited to the property or assets relating to such contract;

(m)         any interest or title of a licensor, sublicensor, lessor or sublessor with respect to any assets under any license or lease agreement entered into in the ordinary course of business which do not (i) interfere in any material respect with the business of the Company or its Subsidiaries or materially detract from the value of the relevant assets of the Company or its Subsidiaries or (ii) secure any Indebtedness;

(n)          Liens incurred in connection with the Permitted Securitization;

(o)         pledges or deposits made in the ordinary course of business to secure payment of worker’s compensation insurance, unemployment insurance, pensions or social security programs;

(p)         Liens arising from good faith deposits in connection with or to secure performance of statutory obligation and surety and appeal bonds;

(q)         Liens on the proceeds of assets that were subject to Liens permitted hereunder or on assets acquired with such proceeds as a replacement of such former assets;

(r)         any Lien on any assets securing purchase money Indebtedness or Indebtedness incurred or assumed for the purpose of financing all or any part of the cost of acquiring, developing, operating, constructing, altering, repairing or improving all or part of such assets; provided such Lien attached to such asset concurrently with or within ninety (90) days after the acquisition thereof, completion of construction, improvement or repair, or commencement of commercial operation of such assets;

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(s)         Liens constituted by a right of set off or rights over a margin call account, or any form of cash collateral, or any similar arrangement, securing Permitted Commodity Hedging Obligations and/or physical trade obligations;

(t)         Liens not otherwise permitted hereunder securing Indebtedness or other obligations in the aggregate principal amount not to exceed the greater of (i) 15% of Consolidated Net Worth (as determined at the end of the most recently ended fiscal quarter) or (ii) $250,000,000 at any time outstanding, less any amount outstanding under the Permitted Securitization; provided that, notwithstanding the foregoing, the Company will not, and will not permit any Subsidiary to, grant any Liens securing Indebtedness outstanding under or in relation to any Principal Credit Facility or any private placement document pursuant to which the Company has issued senior notes, whether now existing or existing in the future, pursuant to this subsection (t) unless and until all obligations of the Company under this Agreement and, with respect to the Company only, the Notes, shall concurrently be secured equally and ratably with such Indebtedness pursuant to documentation in form and substance reasonably satisfactory to the Required Holders, and

(u)         any extension, renewal or replacement (or successive extensions, renewals or replacements), as a whole or in part, of any Liens referred to in the foregoing clauses (a) through (s) for amounts not exceeding the principal of the indebtedness (including undrawn commitments) secured by the Lien so extended, renewed or replaced; provided that such extension, renewal or replacement Lien is limited to all or part of the same property or assets that were covered by the Lien extended, renewed, or replaced (plus improvements on such property or assets);

provided, however, notwithstanding the foregoing, Permitted Liens shall not include (1) other than the Permitted Securitization, Liens on the accounts receivable of the Company and its Subsidiaries generated from the sale of natural gas, (2) Liens on the natural gas inventory of the Company and its Subsidiaries, (3) Liens imposed by ERISA, the creation of which would result in an Event of Default under Section 11(j) and (4) Liens on any of the common stock of any Subsidiary of the Company.”

“Wells Facility” means the Amended and Restated Loan Agreement, dated as of July 22, 2022, as it may be amended from time to time, amongst the Company, Spire Alabama Inc., an Alabama corporation, Spire Missouri Inc., a Missouri corporation, the banks from time to time party thereto and Wells Fargo Bank, National Association, as administrative agent for the banks.

(f) For the purposes of the Note Purchase Agreement and this Second Supplement, the terms “Laclede Gas Loan Agreement” and “Alagsco Loan Agreement” are hereby deleted as it relates to any holder of a Series 2023 Note.

9

7.         For clarity and in addition to any other rights of the Series 2023 Notes, it is acknowledged and agreed that so long as any Series 2023 Notes remain outstanding, in the event the Company is required to offer to prepay any Notes pursuant to Section 8.7 of the Note Purchase Agreement, the Company shall also be required to make such offer pursuant to Section 8.7 of the Note Purchase Agreement to the holders of the Series 2023 Notes.

8.          Each Purchaser severally represents and warrants that the representations and warranties set forth in Section 6 of the Note Purchase Agreement are true and correct on the date hereof with respect to the purchase of the Series 2023 Notes by such Purchaser.

9.         Subject to the terms of this Second Supplement, the Company and each Purchaser agree to be bound by and comply with the terms and provisions of the Note Purchase Agreement as fully and completely as if such Purchaser were an original signatory to the Note Purchase Agreement.

The execution hereof shall constitute a contract between the Company and the Purchaser(s) for the uses and purposes hereinabove set forth, and this agreement may be executed in any number of counterparts, each executed counterpart constituting an original but all together only one agreement.

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This Second Supplement is hereby accepted and agreed to as of the date hereof.

[Signature Page to the Second Supplement to Master Note Purchase Agreement]

This Second Supplement is hereby accepted and agreed to as of the date hereof.

Spire Inc. Second Supplement to Master Note Purchase Agreement

This Second Supplement is hereby accepted and agreed to as of the date hereof.

Spire Inc. Second Supplement to Master Note Purchase Agreement

This Second Supplement is hereby accepted and agreed to as of the date hereof.

Spire Inc. Second Supplement to Master Note Purchase Agreement

Information Relating to Purchasers

Name and Address of Purchaser	Principal Amount of Series 2023 Notes, Tranche D, To Be Purchased
The Prudential Insurance Company of America c/o Prudential Private Capital 2200 Ross Ave., Suite 4300W, Dallas, TX 75201	$27,500,000
The Prudential Insurance Company of America c/o Prudential Private Capital 2200 Ross Ave., Suite 4300W, Dallas, TX 75201	$27,500,000
Allianz Life insurance Company of North America c/o Voya Investment Management Co. LLC 5780 Powers Ferry Road NW, Suite 300, Atlanta, GA 30327-4347	$23,000,000
Voya Retirement Insurance and Annuity Company c/o Voya Investment Management Co. LLC 5780 Powers Ferry Road NW, Suite 300, Atlanta, GA 30327-4347	$4,000,000
Reliastar Life Insurance Company c/o Voya Investment Management Co. LLC 5780 Powers Ferry Road NW, Suite 300, Atlanta, GA 30327-4347	$1,000,000
The Bank of New York Mellon, as Trustee for the Voya Retirement Plan Master Trust c/o Voya Investment Management Co. LLC 5780 Powers Ferry Road NW, Suite 300, Atlanta, GA 30327-4347	$2,000,000
Brighthouse Life Insurance Company c/o Voya Investment Management Co. LLC 5780 Powers Ferry Road NW, Suite 300, Atlanta, GA 30327-4347	$10,000,000
Brighthouse Life Insurance Company c/o Voya Investment Management Co. LLC 5780 Powers Ferry Road NW, Suite 300, Atlanta, GA 30327-4347	$6,000,000
Voya Investment Trust Co., as Trustee for the Voya Private Credit Trust Fund - Goldman Sachs c/o Voya Investment Management Co. LLC 5780 Powers Ferry Road NW, Suite 300, Atlanta, GA 30327-4347	$3,000,000
Deseret Mutual Benefit Administrators as Trustee for the Deseret Mutual Employee Pension Plan c/o Voya Investment Management Co. LLC 5780 Powers Ferry Road NW, Suite 300, Atlanta, GA 30327-4347	$1,000,000
Amica Mutual Insurance Company c/o Voya Investment Management Co. LLC 5780 Powers Ferry Road NW, Suite 300, Atlanta, GA 30327-4347	$2,000,000
Amica Life Insurance Company c/o Voya Investment Management Co. LLC 5780 Powers Ferry Road NW, Suite 300, Atlanta, GA 30327-4347	$1,000,000
Chesapeake Employers' Insurance Company c/o Voya Investment Management Co. LLC 5780 Powers Ferry Road NW, Suite 300, Atlanta, GA 30327-4347	$2,000,000
CoBank, ACB 6340 S. Fiddlers Green Circle, Greenwood Village, Colorado 80111	$40,000,000

Schedule A

(to Second Supplement)

Closing Conditions

Section 4.1.    Representations and Warranties. The representations and warranties of the Company in the Note Purchase Agreement as supplemented by the Second Supplement shall be correct when made and at the time of the Closing.

Section 4.2.     Performance; No Default. The Company shall have performed and complied with all agreements and conditions contained in the Note Purchase Agreement as supplemented by the Second Supplement required to be performed or complied with by it prior to or at the Closing. Before and after giving effect to the issue and sale of the Series 2023 Notes (and the application of the proceeds thereof as contemplated by Section 5.14 of Exhibit B of the Second Supplement), no Default or Event of Default shall have occurred and be continuing.

Section 4.3.    Compliance Certificates. (a) Officer’s Certificate. The Company shall have delivered to such Purchaser an Officer’s Certificate, dated the date of the Closing, certifying that the conditions specified in Sections 4.1, 4.2 and 4.9 of this Exhibit A have been fulfilled.

(b)    Secretary’s Certificate. The Company shall have delivered to such Purchaser a certificate of its Secretary or Assistant Secretary, dated the date of Closing, certifying as to (i) the resolutions attached thereto and (ii) other corporate proceedings relating to the authorization, execution and delivery of the Series 2023 Notes and the Second Supplement.

Section 4.4.    Opinions of Counsel. Such Purchaser shall have received opinions in form and substance reasonably satisfactory to such Purchaser, dated the date of the Closing (a) from Stinson LLP, counsel for the Company, covering the matters set forth in Exhibits 4.4(a) and 4.4(b) of the Note Purchase Agreement and covering such other matters incident to the transactions contemplated hereby as such Purchaser or its counsel may reasonably request (and the Company hereby instructs its counsel to deliver such opinion to the Purchasers), and (b) from Chapman and Cutler LLP, the Purchasers’ special counsel in connection with such transactions, substantially in the form set forth in Exhibit 4.4(c) of the Note Purchase Agreement and covering such other matters incident to such transactions as such Purchaser may reasonably request.

Section 4.5.    Purchase Permitted By Applicable Law, Etc. On the date of the Closing such Purchaser’s purchase of the Series 2023 Notes shall (a) be permitted by the laws and regulations of each jurisdiction to which such Purchaser is subject, without recourse to provisions (such as section 1405(a)(8) of the New York Insurance Law) permitting limited investments by insurance companies without restriction as to the character of the particular investment, (b) not violate any applicable law or regulation (including, without limitation, Regulation T, U or X of the Board of Governors of the Federal Reserve System) (assuming the preparation, execution, delivery and filing of the applicable Federal Reserve Board forms, if required) and (c) not subject such Purchaser to any tax, penalty or liability under or pursuant to any applicable law or regulation, which law or regulation was not in effect on the date hereof. If requested by such Purchaser, such Purchaser shall have received an Officer’s Certificate certifying as to such matters of fact as such Purchaser may reasonably specify to enable such Purchaser to determine whether such purchase is so permitted.

Exhibit A

(to Second Supplement)

Section 4.6.    Sale of Other Notes. Contemporaneously with the Closing, the Company shall sell to each other Purchaser and each other Purchaser shall purchase the Series 2023 Notes to be purchased by it at the Closing as specified in Schedule A of the Second Supplement.

Section 4.7.    Payment of Special Counsel Fees. Without limiting the provisions of Section 15.1 of the Note Purchase Agreement, the Company shall have paid on or before the Closing the reasonable accrued but unpaid fees, charges and disbursements of the Purchasers’ special counsel referred to in Section 4.4 of this Exhibit A to the extent reflected in a detailed statement of such counsel rendered to the Company at least one Business Day prior to the Closing.

Section 4.8.     Private Placement Number. A Private Placement Number issued by the PPN CUSIP Unit of CUSIP Global Services (in cooperation with the SVO) shall have been obtained for the Series 2023 Notes.

Section 4.9.    Changes in Corporate Structure. The Company shall not have changed its jurisdiction of incorporation or been a party to any merger or consolidation or succeeded to all or any substantial part of the liabilities of any other entity, at any time following the date of the most recent financial statements referred to in Schedule 5.5 of the Second Supplement, except as permitted under Section 10.2 of the Note Purchase Agreement.

Section 4.10.     Funding Instructions. At least three Business Days prior to the date of the Closing, each Purchaser shall have received written instructions signed by a Responsible Officer on letterhead of the Company confirming the bank and account information specified in Section 3, including (i) the name and address of the transferee bank, (ii) such bank’s ABA number and (iii) the account name and number into which the purchase price for the Series 2023 Notes is to be deposited which account shall be fully opened and able to receive micro deposits in accordance with this Section 4.10 at least five (5) Business Days prior to the date of such Closing and (iv) contact information of a representative at the transferee bank and a representative of the Company. Each Purchaser has the right, but not the obligation, upon written notice (which may be by email) to the Company, to elect to deliver a micro deposit (less than $50.00) to the account identified in the written instructions no later than two (2) Business Days prior to such Closing. If a Purchaser delivers a micro deposit, a Responsible Officer must verbally verify the receipt and amount of the micro deposit to such Purchaser on a telephone call initiated by such Purchaser prior to such Closing. The Company shall not be obligated to return the amount of the micro deposit, nor will the amount of the micro deposit be netted against the Purchaser’s purchase price of the Notes. At least two Business Days prior to the date of such Closing, if requested by a Purchaser, a Responsible Officer of the Company shall have confirmed the aforementioned written instructions in a live video conference call made available to the Purchasers.

Section 4.11.     Proceedings and Documents. All corporate and other proceedings in connection with the transactions contemplated by the Note Purchase Agreement as supplemented by the Second Supplement and all documents and instruments incident to such transactions shall be satisfactory to such Purchaser and its special counsel, and such Purchaser and its special counsel shall have received all such counterpart originals or certified or other copies of such documents as such Purchaser or such special counsel may reasonably request.

E-A-2

Supplemental Representations

The Company represents and warrants to each Purchaser that:

Section 5.1.    Organization; Power and Authority. The Company is a corporation duly incorporated, validly existing and in good standing under the laws of its jurisdiction of incorporation, and is duly qualified as a foreign corporation and is in good standing in each jurisdiction in which such qualification is required by law, other than those jurisdictions as to which the failure to be so qualified or in good standing would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect. The Company has the corporate power and authority to own or hold under lease the properties it purports to own or hold under lease and to transact the business it transacts and proposes to transact, except, in each case, as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect. The Company has the corporate power and authority to execute and deliver the Second Supplement and the Series 2023 Notes and to perform the provisions hereof and thereof.

Section 5.2.    Authorization, Etc. The Second Supplement and the Series 2023 Notes have been duly authorized by all necessary corporate action on the part of the Company, and the Note Purchase Agreement as supplemented by the Second Supplement constitutes, and upon execution and delivery thereof each Series 2023 Note will constitute, a legal, valid and binding obligation of the Company enforceable against the Company in accordance with its terms, except as such enforceability may be limited by (i) applicable bankruptcy, insolvency, reorganization, fraudulent conveyance, moratorium or other similar laws affecting the enforcement of creditors’ rights generally and (ii) general principles of equity (regardless of whether such enforceability is considered in a proceeding in equity or at law).

Section 5.3.    Disclosure. The Company, through its agents, J.P. Morgan Securities LLC and RBC Capital Markets, LLC, has delivered to each Purchaser a copy of an Investor Presentation, as posted on February 14, 2023 (the “Presentation”), relating to the transactions contemplated by the Second Supplement. The Note Purchase Agreement, the Second Supplement, the Presentation and the documents, certificates or other writings delivered to the Purchasers by or on behalf of the Company in connection with the transactions contemplated by the Note Purchase Agreement and the Second Supplement and identified in Schedule 5.3 to the Second Supplement, and the financial statements listed in Schedule 5.5 to the Second Supplement (the Note Purchase Agreement, the Second Supplement, the Presentation and such documents, certificates or other writings and such financial statements delivered to each Purchaser prior to February 24, 2023 being referred to, collectively, as the “Disclosure Documents”), taken as a whole, do not contain any untrue statement of a material fact or omit to state any material fact necessary to make the statements therein not misleading in light of the circumstances under which they were made; provided that, with respect to projections, budgets and other estimates, the Company represents only that such information was prepared in good faith based upon assumptions believed to be reasonable at the time. Except as disclosed in the Disclosure Documents, since September 30, 2022, there has been no change in the financial condition, operations, business or properties of the Company or any of its Subsidiaries except changes that individually or in the aggregate would not reasonably be expected to have a Material Adverse Effect.

Exhibit B

(to Second Supplement)

Section 5.4.    Organization and Ownership of Shares of Subsidiaries. (a) Schedule 5.4 to the Second Supplement is (except as noted therein) a complete and correct list of the Company’s Subsidiaries, showing, as to each Subsidiary, the correct name thereof, the jurisdiction of its organization, and the percentage of shares of each class of its Capital Stock outstanding owned by the Company and each other Subsidiary.

(b)    All of the outstanding Capital Stock of each Subsidiary shown in Schedule 5.4 to the Second Supplement as being owned by the Company and its Subsidiaries have been validly issued, are fully paid and nonassessable (except as limited to the extent set forth in each Subsidiary’s organizational documents) and are owned by the Company or another Subsidiary free and clear of any Lien (except as otherwise disclosed in Schedule 5.4 to the Second Supplement).

(c)    Each Subsidiary identified in Schedule 5.4 to the Second Supplement is a corporation or other legal entity duly incorporated or organized, as the case may be, validly existing and in good standing under the laws of its jurisdiction of organization, and is duly qualified as a foreign corporation or other legal entity and is in good standing in each jurisdiction in which such qualification is required by law, other than those jurisdictions as to which the failure to be so qualified or in good standing would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect. Each such Subsidiary has the corporate or other power and authority to own or hold under lease the properties it purports to own or hold under lease and to transact the business it transacts and proposes to transact, except, in each case, as would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect.

Section 5.5.    Financial Statements; Material Liabilities. The Company has delivered to each Purchaser copies of the financial statements of the Company and its Subsidiaries listed on Schedule 5.5 to the Second Supplement. All of said financial statements (including in each case the related schedules and notes) fairly present in all material respects the consolidated financial position of the Company and its Subsidiaries as of the respective dates specified in such Schedule and the consolidated results of their operations and cash flows for the respective periods so specified and have been prepared in accordance with GAAP consistently applied throughout the periods involved except as set forth in the notes thereto (subject, in the case of any interim financial statements, to normal year-end adjustments and the absence of footnote disclosures). As of the date of the execution and delivery of the Second Supplement, the Company and its Subsidiaries do not have any Material liabilities that are not disclosed on such financial statements or otherwise disclosed in the Disclosure Documents. As of the date of Closing, the Company and its Subsidiaries will not have any Material liabilities that are not disclosed on the financial statements included, or are not otherwise disclosed in, the Company’s then most recent Form 10‑Q or, as applicable, the Form 10‑K filed with the SEC or as otherwise disclosed in any other report filed with the SEC.

Section 5.6.    Compliance with Laws, Other Instruments, Etc. The execution and delivery of the Series 2023 Notes and the Second Supplement and the performance by the Company of the requirements of the Series 2023 Notes and the Note Purchase Agreement as supplemented by the Second Supplement will not (i) contravene, result in any breach of, or constitute a default under, or result in the creation of any Lien in respect of any property of the Company or any Subsidiary under, any Material indenture, mortgage, deed of trust, loan, purchase or credit agreement, lease, corporate charter or by-laws, or any other Material agreement or instrument to which the Company or any Subsidiary is bound or by which the Company or any Subsidiary or any of their respective properties may be bound or affected, (ii) conflict with or result in a breach of any of the terms, conditions or provisions of any Material order, judgment, decree, or ruling of any court, arbitrator or Governmental Authority applicable to the Company or any Subsidiary or (iii) violate, in any Material respect, any provision of any statute or other rule or regulation of any Governmental Authority applicable to the Company or any Subsidiary.

E-B-2

Section 5.7.    Governmental Authorizations, Etc. No consent, approval or authorization of, or registration, filing or declaration with, any Governmental Authority is required in connection with the execution, delivery or performance by the Company of the Second Supplement or the Series 2023 Notes that has not already been obtained.

Section 5.8.    Litigation; Observance of Statutes and Orders. (a) Except as disclosed under “Item 1. Legal Proceedings” in Part II of the Company’s most recent Form 10-Q included as part of the Disclosure Documents, there are no actions, suits or other legal proceedings pending or, to the actual knowledge of the Company, threatened against or affecting the Company or any Subsidiary or any property of the Company or any Subsidiary in any court or before any arbitrator of any kind or before or by any Governmental Authority that, individually or in the aggregate, would reasonably be expected to have a Material Adverse Effect, and (ii) to the actual knowledge of the Company, there are no audits or investigations by any Governmental Authority pending or threatened against or affecting the Company or any Subsidiary or any property of the Company or any Subsidiary that, individually or in the aggregate, would reasonably be expected to have a Material Adverse Effect.

(b)    Neither the Company nor any Subsidiary is (i) in default under any term of any agreement or instrument to which it is a party or by which it is bound, (ii) in violation of any order, judgment, decree or ruling of any court, arbitrator or Governmental Authority or (iii) in violation of any applicable law, ordinance, rule or regulation of any Governmental Authority (including, without limitation, Environmental Laws, the USA PATRIOT Act or any of the other laws and regulations that are referred to in Section 5.16 of this Exhibit A), which default or violation, individually or in the aggregate, would reasonably be expected to have a Material Adverse Effect.

Section 5.9.    Taxes. The Company and its Subsidiaries have filed all Material income tax returns that are required to have been filed in any jurisdiction, and have paid all taxes shown to be due and payable on such returns and all other taxes and assessments payable by them, to the extent such taxes and assessments have become due and payable and before they have become delinquent, except for any taxes and assessments (i) the amount of which is not individually or in the aggregate Material or (ii) the amount, applicability or validity of which is currently being contested in good faith by appropriate proceedings and with respect to which the Company or a Subsidiary, as the case may be, has established adequate reserves in accordance with GAAP. The Federal income tax liabilities of the Company and its Subsidiaries have been finally determined (whether by reason of completed audits or the statute of limitations having run) for all fiscal years up to and including the fiscal year ended September 30, 2011.

E-B-3

Section 5.10.     Title to Property; Leases. The Company and its Subsidiaries have good and sufficient title to their respective owned Material properties, including all such properties reflected in the most recent audited balance sheet referred to in Section 5.5 of this Exhibit A or purported to have been acquired by the Company or any Subsidiary after said date (except as sold or otherwise disposed of in the ordinary course of business), in each case free and clear of Liens prohibited by the Note Purchase Agreement as supplemented by the Second Supplement, except for those defects in title and Liens that, individually or in the aggregate, would not have a Material Adverse Effect. All Material leases are valid and subsisting and are in full force and effect in all material respects.

Section 5.11.     Licenses, Permits, Etc. The Company and its Subsidiaries own or possess all licenses, permits, franchises, authorizations, patents, copyrights, proprietary software, service marks, trademarks and trade names, or rights thereto, that are Material, without known conflict with the rights of others, except for those conflicts that, individually or in the aggregate, would not have a Material Adverse Effect.

Section 5.12.     Compliance with ERISA. (a) The Company and each ERISA Affiliate have operated and administered each Plan in compliance with all applicable laws except for such instances of noncompliance as have not resulted in and could not, individually or in the aggregate, reasonably be expected to result in a Material Adverse Effect. Neither the Company nor any ERISA Affiliate has incurred any liability pursuant to Title I or IV of ERISA or the penalty or excise tax provisions of the Code relating to employee benefit plans (as defined in section 3 of ERISA), and no event, transaction or condition has occurred or exists that could, individually or in the aggregate, reasonably be expected to result in the incurrence of any such liability by the Company or any ERISA Affiliate, or in the imposition of any Lien on any of the rights, properties or assets of the Company or any ERISA Affiliate, in either case pursuant to Title I or IV of ERISA or to section 430(k) of the Code or to any such penalty or excise tax provisions under the Code or federal law or section 4068 of ERISA or by the granting of a security interest in connection with the amendment of a Plan, other than such liabilities or Liens as would not be individually or in the aggregate Material.

(b)    The present value of the aggregate benefit liabilities under each of the Plans (other than Multiemployer Plans), determined as of the end of such Plan’s most recently ended plan year on the basis of the actuarial assumptions specified for funding purposes in such Plan’s most recent actuarial valuation report, did not exceed the aggregate current value of the assets of such Plan allocable to such benefit liabilities by more than an amount that would be reasonably expected to result in a Material Adverse Effect. The term “benefit liabilities” has the meaning specified in section 4001 of ERISA and the terms “current value” and “present value” have the meaning specified in section 3 of ERISA.

(c)    The Company and its ERISA Affiliates have not incurred withdrawal liabilities (and are not subject to contingent withdrawal liabilities) under section 4201 or 4204 of ERISA in respect of Multiemployer Plans that individually or in the aggregate are Material.

(d)    The expected postretirement benefit obligation (determined as of the last day of the Company’s most recently ended fiscal year in accordance with Financial Accounting Standards Board Accounting Standards Codification Topic 715 60, without regard to liabilities attributable to continuation coverage mandated by section 4980B of the Code) of the Company and its Subsidiaries is not Material.

E-B-4

(e)    The execution and delivery of the Second Supplement and the issuance and sale of the Series 2023 Notes hereunder will not involve any transaction that is subject to the prohibitions of section 406 of ERISA or in connection with which a tax could be imposed pursuant to section 4975(c)(1)(A)-(D) of the Code. The representation by the Company to each Purchaser in the first sentence of this Section 5.12(e) is made in reliance upon and subject to the accuracy of such Purchaser’s representation in Section 6.2 of the Note Purchase Agreement as to the sources of the funds to be used to pay the purchase price of the Series 2023 Notes to be purchased by such Purchaser.

Section 5.13.      Private Offering by the Company. Neither the Company nor anyone acting on its behalf has offered the Series 2023 Notes or any similar Securities for sale to, or solicited any offer to buy any of the same from, or otherwise approached or negotiated in respect thereof with, any Person other than the Purchasers and not more than 32 other Institutional Investors of the type described in clause (c) of the definition thereof, each of which has been offered the Series 2023 Notes at a private sale for investment. Neither the Company nor anyone acting on its behalf has taken, or will take, any action that would subject the issuance or sale of the Series 2023 Notes to the registration requirements of Section 5 of the Securities Act or to the registration requirements of any securities or blue sky laws of any applicable jurisdiction.

Section 5.14.     Use of Proceeds; Margin Regulations. The Company will apply the proceeds of the sale of the Series 2023 Notes as described in the “Transaction Overview” section of the Presentation. No part of the proceeds from the sale of the Series 2023 Notes under the Second Supplement will be used, directly or indirectly, for the purpose of buying or carrying any margin stock within the meaning of Regulation U of the Board of Governors of the Federal Reserve System (12 CFR 221), or for the purpose of buying or carrying or trading in any Securities under such circumstances as to involve the Company in a violation of Regulation X of said Board (12 CFR 224) or to involve any broker or dealer in a violation of Regulation T of said Board (12 CFR 220). Margin stock does not constitute more than 15% of the value of the consolidated assets of the Company and its Subsidiaries and the Company does not have any present intention that margin stock will constitute more than 15% of the value of such assets. As used in this Section, the terms “margin stock” and “purpose of buying or carrying” shall have the meanings assigned to them in said Regulation U.

Section 5.15.     Existing Indebtedness. (a) Except as described therein, Schedule 5.15 to the Second Supplement sets forth a complete and correct list of all outstanding Indebtedness of the Company and its Subsidiaries as of March 7, 2023 (including a description of the obligors, principal amount outstanding and collateral therefor, if any, and Guaranty thereof, if any), since which date there has been no Material change in the amounts, interest rates, sinking funds, installment payments or maturities of the Indebtedness of the Company or its Subsidiaries (other than as permitted hereunder). Neither the Company nor any Subsidiary is in default and no waiver of default is currently in effect, in the payment of any principal or interest on any Indebtedness of the Company or such Subsidiary and no event or condition exists with respect to any Indebtedness of the Company or any Subsidiary the outstanding principal amount of which exceeds $25,000,000 that would permit (or that with notice or the lapse of time, or both, would permit) one or more Persons to cause such Indebtedness to become due and payable before its stated maturity or before its regularly scheduled dates of payment.

E-B-5

(b)    Neither the Company nor any Subsidiary is a party to, or otherwise subject to any provision contained in, any instrument evidencing Indebtedness of the Company or such Subsidiary, any agreement relating thereto or any other agreement (including, but not limited to, its charter or other organizational document) which limits the amount of, or otherwise imposes restrictions on the incurring of, Indebtedness of the Company, except as specifically indicated in Schedule 5.15 to the Second Supplement.

Section 5.16.     Foreign Assets Control Regulations, Etc. (a) Neither the Company nor any Controlled Entity (i) is a Blocked Person, (ii) has been notified that its name appears or may in the future appear on a State Sanctions List or (iii) is a target of sanctions that have been imposed by the United Nations or the European Union.

(b)    Neither the Company nor any Controlled Entity (i) has violated, been found in violation of, or been charged or convicted under, any applicable U.S. Economic Sanctions Laws, Anti‑Money Laundering Laws or Anti‑Corruption Laws or (ii) to the Company’s knowledge, is under investigation by any Governmental Authority for possible violation of any U.S. Economic Sanctions Laws, Anti‑Money Laundering Laws or Anti‑Corruption Laws.

(c)     No part of the proceeds from the sale of the Series 2023 Notes hereunder:

(i)     constitutes or will constitute funds obtained on behalf of any Blocked Person or will otherwise be used by the Company or any Controlled Entity, directly or indirectly, (A) in connection with any investment in, or any transactions or dealings with, any Blocked Person, (B) for any purpose that would cause any Purchaser to be in violation of any U.S. Economic Sanctions Laws or (C) otherwise in violation of any U.S. Economic Sanctions Laws;

(ii)     will be used, directly or indirectly, in violation of, or cause any Purchaser to be in violation of, any applicable Anti‑Money Laundering Laws; or

(iii)     will be used, directly or indirectly, for the purpose of making any improper payments, including bribes, to any Governmental Official or commercial counterparty in order to obtain, retain or direct business or obtain any improper advantage, in each case which would be in violation of, or cause any Purchaser to be in violation of, any applicable Anti‑Corruption Laws.

(d)    The Company has established procedures and controls which it reasonably believes are adequate (and otherwise comply with applicable law) to ensure that the Company and each Controlled Entity is and will continue to be in compliance with all applicable U.S. Economic Sanctions Laws, Anti‑Money Laundering Laws and Anti‑Corruption Laws.

E-B-6

Section 5.17.     Status under Certain Statutes. Neither the Company nor any Subsidiary is subject to regulation under the Investment Company Act of 1940, as amended, the Public Utility Holding Company Act of 2005, as amended, the ICC Termination Act of 1995, as amended, or the Federal Power Act, as amended.

Section 5.18.     No Subsidiary Guarantors. As of the date hereof, there are no Subsidiaries that have an outstanding Guaranty with respect to any Indebtedness of the Company under any Principal Facility, or are a borrower under, co-obligor on, or jointly liable with respect to, any such Indebtedness outstanding under a Principal Credit Facility.

E-B-7

[Form of Series 2023 Note]

THE SECURITY (OR ITS PREDECESSOR) EVIDENCED HEREBY WAS ORIGINALLY ISSUED IN A TRANSACTION EXEMPT FROM REGISTRATION UNDER SECTION 5 OF THE UNITED STATES SECURITIES ACT OF 1933, AS AMENDED AND THE SECURITY EVIDENCED HEREBY MAY NOT BE OFFERED, SOLD OR OTHERWISE TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR AN APPLICABLE EXEMPTION THEREFROM AND, IN EACH CASE IN ACCORDANCE WITH ANY APPLICABLE SECURITIES LAWS OF ANY STATE OF THE UNITED STATES OR ANY OTHER APPLICABLE JURISDICTION.

5.80% Series 2023 Senior Note, Tranche D, due March 15, 2033

No. [_____]	March 7, 2023
$[_______]	PPN 84857L B*1

For Value Received, the undersigned, Spire Inc. (herein called the “Company”), a corporation organized and existing under the laws of the State of Missouri, hereby promises to pay to [____________], or its registered assigns, the principal sum of [_____________________] Dollars (or so much thereof as shall not have been prepaid) on March 15, 2033, with interest (computed on the basis of a 360-day year of twelve 30‑day months) (a) on the unpaid balance hereof at the rate of 5.80% per annum from the date hereof, payable semi-annually, on the 15th day of March and September in each year, commencing with the 15^th day of September, 2023, until the principal hereof shall have become due and payable, and (b) to the extent permitted by law, on any overdue payment (including any overdue prepayment) of principal, any overdue payment of interest and any overdue payment of any Make‑Whole Amount, payable semi‑annually as aforesaid (or, at the option of the registered holder hereof, on demand), at a rate per annum from time to time equal to the greater of (i) 7.80% and (ii) 2.0% over the rate of interest publicly announced by Chase Bank N.A., from time to time in New York, New York as its “base” or “prime” rate.

Payments of principal of, interest on and any Make-Whole Amount with respect to this Note are to be made in lawful money of the United States of America at UMB Bank & Trust, N.A. or at such other place as the Company shall have designated by written notice to the holder of this Note as provided in the Note Purchase Agreement referred to below.

This Note is one of a series of Senior Notes (herein called the “Notes”) issued pursuant to a Second Supplement to the Master Note Purchase Agreement, dated June 20, 2016 (as from time to time amended, restated and supplemented, the “Note Purchase Agreement”), between the Company and the respective Purchasers named therein and is entitled to the benefits thereof. Each holder of this Note will be deemed, by its acceptance hereof, to have (i) agreed to the provisions of the Note Purchase Agreement, including, without limitation, the confidentiality provisions set forth in Section 20 of the Note Purchase Agreement and (ii) made the representations set forth in Section 6.1 (except, in the case of a subsequent transferee, only Section 6.1(a)) and Section 6.2 of the Note Purchase Agreement. Unless otherwise indicated, capitalized terms used in this Note shall have the respective meanings ascribed to such terms in the Note Purchase Agreement.

Exhibit 1

(to Second Supplement)

This Note is a registered Note and, as provided in the Note Purchase Agreement, upon surrender of this Note for registration of transfer, accompanied by a written instrument of transfer duly executed, by the registered holder hereof or such holder’s attorney duly authorized in writing, a new Note for a like principal amount will be issued to, and registered in the name of, the transferee. Prior to due presentment for registration of transfer, the Company may treat the Person in whose name this Note is registered as the owner hereof for the purpose of receiving payment and for all other purposes, and the Company will not be affected by any notice to the contrary.

This Note is subject to optional prepayment, in whole or from time to time in part, at the times and on the terms specified in the Note Purchase Agreement, but not otherwise.

If an Event of Default occurs and is continuing, the principal of this Note may be declared or otherwise become due and payable in the manner, at the price (including any applicable Make-Whole Amount) and with the effect provided in the Note Purchase Agreement.

This Note shall be construed and enforced in accordance with, and the rights of the Company and the holder of this Note shall be governed by, the law of the State of New York excluding choice-of-law principles of the law of such State that would permit the application of the laws of a jurisdiction other than such State.

Spire Inc.
By
	Name:
	Title

E-1-2

Disclosure Materials

1. Private Placement Investor Presentation dated February 14, 2023.

Schedule 5.3

(to Second Supplement)

Subsidiaries of the Company and

Ownership of Subsidiary Stock

Name	Jurisdiction of Organization	Percent of Capital Stock Owned by Parent	Parent Entity
Belle Butte LLC	Missouri	100%	Spire Midstream LLC
Laclede Development Company	Missouri	100%	Spire Inc.
Laclede Insurance Risk Services, Inc.	South Carolina	100%	Spire Inc.
Spire Alabama Inc.	Alabama	100%	Spire Inc.
Spire CNG Inc.	Missouri	100%	Spire Resources LLC
Spire EnergySouth Inc.	Delaware	100%	Spire Inc.
Spire Gulf Inc.	Alabama	100%	Spire EnergySouth Inc.
Spire Marketing Inc.	Missouri	100%	Spire Resources LLC
Spire Midstream LLC	Missouri	100%	Spire Resources LLC
Spire Mississippi Inc.	Mississippi	100%	Spire EnergySouth Inc.
Spire Missouri Inc.	Missouri	100%	Spire Inc.
Spire NGL Inc.	Missouri	100%	Spire Resources LLC
Spire Oil Services LLC	Missouri	100%	Spire NGL Inc.
Spire Resources LLC	Missouri	100%	Spire Inc.
Spire Services Inc.	Missouri	100%	Spire Inc.
Spire STL Pipeline LLC	Missouri	100%	Spire Midstream LLC
Spire Storage West LLC	Delaware	100%	Belle Butte LLC

Schedule 5.4

(to Second Supplement)

Financial Statements

Spire Inc.	Annual Report on Form 10‑K for the year ended September 30, 2022 Quarterly Report on form 10‑Q for the quarter ended December 31, 2022
Spire Alabama Inc.	Annual Report on Form 10‑K for the year ended September 30, 2022 Quarterly Report on Form 10‑Q for the quarter ended December 31, 2022
Spire Missouri Inc.	Annual Report on Form 10‑K for the year ended September 30, 2022 Quarterly Report on Form 10‑Q for the quarter ended December 31, 2022

Schedule 5.5

(to Second Supplement)

Existing Indebtedness

	As of December 31, 2022
Spire
3.31% Notes Payable, due December 15, 2022	$	—
3.54% Senior Notes, due February 27, 2024		150.0
0.75% Remarketable Senior Notes, due March 1, 2026		175.0
3.13% Senior Notes, due September 1, 2026		130.0
3.93% Senior Notes, due March 15, 2027		100.0
4.70% Senior Notes, due August 15, 2044		250.0
Total principal of Spire Missouri long-term debt (see below)		1,648.0
Total principal of Spire Alabama long-term debt (see below)		750.0
Other subsidiaries' long-term debt:
5.00% First Mortgage Bonds, due September 30, 2031		42.0
2.95% Notes, with annual principal payments through December 2034		117.7
5.61% First Mortgage Bonds, due October 15, 2037		30.0
3.52% First Mortgage Bonds, due September 30, 2049		40.0
Total principal of long-term debt		3,432.7
Less: Unamortized discounts and debt issuance costs		(19.8	)
Less: Current portion		(256.6	)
Long-term debt, excluding current portion	$	3,156.3
Spire Missouri
First Mortgage Bonds:
3.40% Series, due August 15, 2023	$	250.0
Floating Rate Series, due December 2, 2024		300.0
3.40% Series, due March 15, 2028		45.0
7.00% Series, due June 1, 2029	19.3
2.84% Series, due November 15, 2029		275.0
7.90% Series, due September 15, 2030		30.0
3.68% Series, due September 15, 2032		50.0
6.00% Series, due May 1, 2034		99.3
6.15% Series, due June 1, 2036		54.5
4.63% Series, due August 15, 2043		99.9
4.23% Series, due September 15, 2047		70.0
3.30% Series, due June 1, 2051		305.0
4.38% Series, due September 15, 2057		50.0
Total principal of Spire Missouri long-term debt		1,648.0
Less: Unamortized discounts and debt issuance costs		(9.9	)
Less: Current portion		(250.0	)
Spire Missouri long-term debt, excluding current portion	$	1,388.1
Spire Alabama
3.86% Notes, due December 22, 2021	$	—
3.21% Notes, due September 15, 2025		35.0
5.32% Notes, due October 15, 2029		90.0
2.88% Notes, due December 1, 2029		100.0
2.04% Notes, due December 15, 2030		150.0
5.41% Notes, due October 15, 2032		85.0
5.90% Notes, due January 15, 2037		45.0
4.31% Notes, due December 1, 2045		80.0
3.92% Notes, due January 15, 2048		45.0
4.64% Notes, due January 15, 2049		90.0
4.02% Notes, due January 15, 2058		30.0
Total principal of Spire Alabama long-term debt		750.0
Less: Unamortized discounts and debt issuance costs		(4.4	)
Less: Current portion		—
Spire Alabama long-term debt, excluding current portion	$	745.6

Schedule 5.15

(to Second Supplement)

EX-31.1

Exhibit 31.1

CERTIFICATION

I, Suzanne Sitherwood, 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 3, 2023	Signature:	/s/ Suzanne Sitherwood
			Suzanne Sitherwood
			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 3, 2023	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 3, 2023	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 3, 2023	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 3, 2023	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 3, 2023	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, Suzanne Sitherwood, 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, 2023, 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, 2023, fairly presents, in all material respects, the financial condition and results of operations of Spire Inc.

Date: May 3, 2023	Signature:	/s/ Suzanne Sitherwood
		Suzanne Sitherwood
		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, 2023, 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, 2023, fairly presents, in all material respects, the financial condition and results of operations of Spire Inc.

Date: May 3, 2023	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, 2023, 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, 2023, fairly presents, in all material respects, the financial condition and results of operations of Spire Missouri Inc.

Date: May 3, 2023	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, 2023, 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, 2023, fairly presents, in all material respects, the financial condition and results of operations of Spire Missouri Inc.

Date: May 3, 2023	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, 2023, 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, 2023, fairly presents, in all material respects, the financial condition and results of operations of Spire Alabama Inc.

Date: May 3, 2023	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, 2023, 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, 2023, fairly presents, in all material respects, the financial condition and results of operations of Spire Alabama Inc.

Date: May 3, 2023	Signature:	/s/ Adam W. Woodard
		Adam W. Woodard
		Chief Financial Officer

XML

Document And Entity Information - shares	6 Months Ended
	Mar. 31, 2023	Apr. 30, 2023
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	2023
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
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		52,597,027
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	2023
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		25,325
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	2023
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, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Operating Revenues	$ 1,123.4	$ 880.9	$ 1,937.4	$ 1,436.3
Operating Expenses:
Natural gas	586.5	392.0	1,005.7	641.2
Operation and maintenance	132.1	113.2	264.2	229.6
Depreciation and amortization	62.6	58.9	124.7	115.8
Taxes, other than income taxes	81.9	71.6	132.3	109.2
Total Operating Expenses	863.1	635.7	1,526.9	1,095.8
Operating Income	260.3	245.2	410.5	340.5
Interest Expense, Net	47.2	27.5	90.8	56.1
Other Income (Expense), Net	7.0	(3.4)	13.0	4.0
Income Before Income Taxes	220.1	214.3	332.7	288.4
Income Tax Expense	40.9	40.7	62.5	59.1
Net Income	179.2	173.6	270.2	229.3
Provision for preferred dividends	3.7	3.7	7.4	7.4
Income allocated to participating securities	0.4	0.2	0.5	0.3
Net Income Available to Common Shareholders	$ 175.1	$ 169.7	$ 262.3	$ 221.6
Weighted Average Number of Common Shares Outstanding:
Basic (in shares)	52.5	51.8	52.5	51.7
Diluted (in shares)	52.6	51.9	52.6	51.8
Basic Earnings Per Common Share (in dollars per share)	$ 3.33	$ 3.27	$ 5.00	$ 4.28
Diluted Earnings Per Common Share (in dollars per share)	$ 3.33	$ 3.27	$ 4.99	$ 4.28
Operating Revenues	$ 1,123.4	$ 880.9	$ 1,937.4	$ 1,436.3
Spire Alabama Inc [Member]
Operating Revenues	218.3	204.1	370.7	330.7
Operating Expenses:
Natural gas	61.8	52.1	131.2	97.6
Operation and maintenance	34.5	32.9	69.6	67.4
Depreciation and amortization	17.0	16.7	34.0	33.2
Taxes, other than income taxes	16.1	14.5	26.7	23.5
Total Operating Expenses	129.4	116.2	261.5	221.7
Operating Income	88.9	87.9	109.2	109.0
Interest Expense, Net	9.0	4.7	17.3	9.8
Other Income (Expense), Net	0.3	0.1	0.7	0.5
Income Before Income Taxes	80.2	83.3	92.6	99.7
Income Tax Expense	20.2	20.9	23.4	25.1
Net Income	60.0	62.4	69.2	74.6
Weighted Average Number of Common Shares Outstanding:
Operating Revenues	$ 218.3	$ 204.1	$ 370.7	$ 330.7

XML

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Mar. 31, 2023		Mar. 31, 2022	Mar. 31, 2023		Mar. 31, 2022
Net Income	$ 179.2		$ 173.6	$ 270.2		$ 229.3
Other Comprehensive (Loss) Income, Before Tax:
Net hedging (loss) gain arising during the period	(6.8)		18.7	(9.8)		13.9
Amounts reclassified into regulatory liabilities	(17.5)		0.0	(17.5)		0.0
Amounts reclassified into net income	(0.5)		(0.4)	(0.8)		(0.7)
Net (loss) gain on cash flow hedging derivative instruments	(24.8)		18.3	(28.1)		13.2
Net gain on defined benefit pension and other postretirement plans	0.1		0.1	0.2		0.2
Net unrealized loss on available for sale securities	0.0		(0.1)	0.0		(0.2)
Other Comprehensive (Loss) Income, Before Tax	(24.7)		18.3	(27.9)		13.2
Income Tax (Benefit) Expense Related to Items of Other Comprehensive Income or Loss	(5.8)		4.3	(6.6)		3.1
Other Comprehensive (Loss) Income, Net of Tax	(18.9)		14.0	(21.3)		10.1
Comprehensive Income	160.3		187.6	248.9		239.4
Operating Revenues	1,123.4		880.9	1,937.4		1,436.3
Operating Expenses:
Natural gas	586.5		392.0	1,005.7		641.2
Operation and maintenance	132.1		113.2	264.2		229.6
Depreciation and amortization	62.6		58.9	124.7		115.8
Taxes, other than income taxes	81.9		71.6	132.3		109.2
Total Operating Expenses	863.1		635.7	1,526.9		1,095.8
Operating Income	260.3		245.2	410.5		340.5
Interest Expense, Net	47.2		27.5	90.8		56.1
Other Income (Expense), Net	7.0		(3.4)	13.0		4.0
Income Before Income Taxes	220.1		214.3	332.7		288.4
Income Tax Expense	40.9		40.7	62.5		59.1
Net Income	179.2		173.6	270.2		229.3
Other Comprehensive Income, Net of Tax	(18.9)		14.0	(21.3)		10.1
Comprehensive Income	160.3		187.6	248.9		239.4
Spire Missouri [Member]
Net Income	112.1	[1]	98.2	159.4	[1]	143.5
Other Comprehensive (Loss) Income, Before Tax:
Other Comprehensive (Loss) Income, Net of Tax	0.1	[1]	0.1	0.2	[1]	0.2
Comprehensive Income	112.2		98.3	159.6		143.7
Operating Revenues	791.0		571.2	1,332.2		919.1
Operating Expenses:
Natural gas	465.7		287.8	782.4		444.1
Operation and maintenance	77.4		64.3	154.5		130.6
Depreciation and amortization	39.2		35.9	77.8		70.1
Taxes, other than income taxes	61.2		53.0	97.6		78.7
Total Operating Expenses	643.5		441.0	1,112.3		723.5
Operating Income	147.5		130.2	219.9		195.6
Interest Expense, Net	24.6		14.2	46.6		28.7
Other Income (Expense), Net	5.9		(2.4)	10.9		3.5
Income Before Income Taxes	128.8		113.6	184.2		170.4
Income Tax Expense	16.7		15.4	24.8		26.9
Net Income	112.1	[1]	98.2	159.4	[1]	143.5
Other Comprehensive Income, Net of Tax	0.1	[1]	0.1	0.2	[1]	0.2
Comprehensive Income	$ 112.2		$ 98.3	$ 159.6		$ 143.7

[1] Accumulated other comprehensive income (loss)

XML

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($) $ in Millions	Mar. 31, 2023		Sep. 30, 2022		Mar. 31, 2022
ASSETS
Utility Plant	$ 7,892.4		$ 7,664.9		$ 7,443.7
Less: Accumulated depreciation and amortization	2,358.5		2,294.5		2,241.9
Net Utility Plant	5,533.9		5,370.4		5,201.8
Non-utility Property (net of accumulated depreciation and amortization of $60.6, $50.7 and $41.3 at March 31, 2023, September 30, 2022, and March 31, 2022, respectively)	520.4		491.4		475.8
Other Investments	131.3		87.8		89.0
Total Other Property and Investments	651.7		579.2		564.8
Other Property and Investments	651.7		579.2		564.8
Current Assets:
Cash and cash equivalents	6.9		6.5		8.3
Utility	453.7		210.8		389.2
Other	166.0		443.8		245.4
Allowance for credit losses	(40.6)		(31.9)		(35.1)
Delayed customer billings	85.6		21.3		54.7
Accounts receivable:
Utility	453.7		210.8		389.2
Other	166.0		443.8		245.4
Allowance for credit losses	(40.6)		(31.9)		(35.1)
Delayed customer billings	85.6		21.3		54.7
Inventories:
Natural gas	146.8		371.8		125.0
Propane gas	8.6		8.6		8.6
Materials and supplies	48.9		41.9		34.7
Regulatory assets	143.0		355.4		164.0
Prepayments	32.5		41.1		26.6
Other current assets	60.2		122.7		67.9
Total Current Assets	1,111.6		1,592.0		1,089.3
Deferred Charges and Other Assets:
Goodwill	1,171.6		1,171.6		1,171.6
Regulatory assets	1,316.7		1,112.4		1,106.8
Other	263.5		258.1		267.0
Total Deferred Charges and Other Assets	2,751.8		2,542.1		2,545.4
Total Assets	10,049.0		10,083.7		9,401.3
Capitalization:
Preferred stock ($25.00 par value per share; 10.0 million depositary shares authorized, issued and outstanding at March 31, 2023, September 30, 2022, and March 31, 2022)	242.0		242.0		242.0
Common stock (par value $1.00 per share; 70.0 million shares authorized; 52.6 million, 52.5 million, and 52.1 million shares issued and outstanding at March 31, 2023, September 30, 2022, and March 31, 2022, respectively)	52.6		52.5		52.1
Paid-in capital	1,576.5		1,571.3		1,541.1
Retained earnings	1,089.5		905.5		992.3
Accumulated other comprehensive income	25.9		47.2		13.7
Total Shareholders' Equity	2,986.5		2,818.5		2,841.2
Temporary equity	18.8		13.1		11.8
Long-term debt (less current portion)	3,702.5		2,958.5		3,207.3
Total Capitalization	6,707.8		5,790.1		6,060.3
Current Liabilities:
Current portion of long-term debt	256.6		281.2		31.2
Notes payable	561.0		1,037.5		607.1
Accounts payable	232.3		617.4		367.5
Advance customer billings	6.8		18.7		6.3
Wages and compensation accrued	38.6		50.2		39.3
Customer deposits	28.3		28.2		29.4
Taxes accrued	79.9		90.1		67.4
Regulatory liabilities	5.3		3.7		3.2
Other current liabilities	198.1		226.6		244.4
Total Current Liabilities	1,406.9		2,353.6		1,395.8
Deferred Credits and Other Liabilities:
Deferred income taxes	737.9		675.1		666.5
Pension and postretirement benefit costs	158.6		163.0		199.2
Asset retirement obligations	531.5		520.9		530.1
Regulatory liabilities	360.3		418.2		400.4
Other noncurrent liabilities	146.0		162.8		149.0
Total Deferred Credits and Other Liabilities	1,934.3		1,940.0		1,945.2
Commitments and Contingencies (Note 11)
Total Capitalization and Liabilities	10,049.0		10,083.7		9,401.3
Spire Missouri [Member]
ASSETS
Utility Plant	4,731.2		4,550.4		4,416.9
Less: Accumulated depreciation and amortization	1,027.1		982.1		949.2
Net Utility Plant	3,704.1		3,568.3		3,467.7
Total Other Property and Investments	66.7		58.9		66.9
Other Property and Investments	66.7		58.9		66.9
Current Assets:
Utility	362.0		131.5		288.6
Other	32.5		44.5		35.3
Allowance for credit losses	(34.5)		(24.9)		(27.0)
Delayed customer billings	84.5		16.1		53.5
Accounts receivable:
Utility	362.0		131.5		288.6
Other	32.5		44.5		35.3
Allowance for credit losses	(34.5)		(24.9)		(27.0)
Delayed customer billings	84.5		16.1		53.5
Inventories:
Natural gas	86.7		215.3		80.9
Propane gas	8.6		8.6		8.6
Materials and supplies	24.4		22.0		18.6
Regulatory assets	62.7		288.1		112.7
Prepayments	18.5		23.3		16.0
Total Current Assets	649.2		728.2		590.8
Deferred Charges and Other Assets:
Goodwill	210.2		210.2		210.2
Regulatory assets	722.0		547.6		572.7
Other	107.2		105.0		126.4
Total Deferred Charges and Other Assets	1,039.4		862.8		909.3
Total Assets	5,459.4		5,218.2		5,034.7
Capitalization:
Retained earnings	1,061.3		931.9		960.5
Accumulated other comprehensive income	(2.5)		(2.7)		(4.0)
Total Shareholders' Equity	1,875.0	[1]	1,745.4	[1]	1,744.9
Long-term debt (less current portion)	1,784.5		1,387.7		1,637.1
Total Capitalization	3,659.5		3,133.1		3,382.0
Paid-in capital and common stock (par value $1.00 per share; 50.0 million shares authorized; 25,325, 25,325, and 24,929 shares issued and outstanding at March 31, 2023, September 30, 2022, and March 31, 2022, respectively)	816.2		816.2		788.4
Current Liabilities:
Current portion of long-term debt	250.0		250.0		0.0
Advance customer billings	0.0		7.0		0.0
Wages and compensation accrued	20.4		33.8		27.1
Customer deposits	6.0		6.5		7.7
Taxes accrued	47.2		50.4		37.4
Other current liabilities	52.5		45.6		49.4
Total Current Liabilities	726.9		970.9		502.6
Deferred Credits and Other Liabilities:
Deferred income taxes	533.3		500.1		498.9
Pension and postretirement benefit costs	99.8		115.5		132.9
Asset retirement obligations	112.8		110.6		146.3
Regulatory liabilities	276.9		331.8		313.7
Other noncurrent liabilities	50.2		56.2		58.3
Total Deferred Credits and Other Liabilities	1,073.0		1,114.2		1,150.1
Commitments and Contingencies (Note 11)
Total Capitalization and Liabilities	5,459.4		5,218.2		5,034.7
Spire Missouri [Member] | Related Party [Member]
Current Assets:
Associated companies	3.8		3.7		3.6
Accounts receivable:
Associated companies	3.8		3.7		3.6
Current Liabilities:
Notes payable	60.7		445.3		277.2
Accounts payable	11.3		13.3		6.9
Spire Missouri [Member] | Nonrelated Party [Member]
Current Liabilities:
Notes payable	200.0		0.0		0.0
Accounts payable	78.8		119.0		96.9
Spire Alabama Inc [Member]
ASSETS
Utility Plant	2,781.4		2,732.6		2,643.9
Less: Accumulated depreciation and amortization	1,208.7		1,184.1		1,154.0
Net Utility Plant	1,572.7		1,548.5		1,489.9
Current Assets:
Cash and cash equivalents	1.0		2.4		0.2
Utility	75.4		69.9		86.0
Other	5.3		6.5		5.6
Allowance for credit losses	(5.3)		(6.3)		(7.1)
Delayed customer billings	1.0		4.8		1.2
Accounts receivable:
Utility	75.4		69.9		86.0
Other	5.3		6.5		5.6
Allowance for credit losses	(5.3)		(6.3)		(7.1)
Delayed customer billings	1.0		4.8		1.2
Inventories:
Natural gas	41.4		72.5		32.0
Materials and supplies	20.5		16.3		13.1
Regulatory assets	64.8		56.9		41.0
Prepayments	3.8		5.8		3.6
Total Current Assets	208.7		230.1		176.3
Deferred Charges and Other Assets:
Regulatory assets	568.3		538.2		506.7
Other	81.9		81.3		63.6
Total Deferred Charges and Other Assets	650.2		630.5		579.4
Total Assets	2,431.6		2,409.1		2,245.6
Deferred income taxes	0.0		11.0		9.1
Capitalization:
Retained earnings	645.3		589.1		611.2
Total Shareholders' Equity	935.2		906.0		934.1
Long-term debt (less current portion)	745.7		571.5		571.4
Total Capitalization	1,680.9		1,477.5		1,505.5
Paid-in capital and common stock (par value $1.00 per share; 50.0 million shares authorized; 25,325, 25,325, and 24,929 shares issued and outstanding at March 31, 2023, September 30, 2022, and March 31, 2022, respectively)	289.9		316.9		322.9
Current Liabilities:
Accounts payable	29.8		85.6		50.8
Advance customer billings	5.3		9.9		5.2
Wages and compensation accrued	5.4		7.6		5.6
Customer deposits	19.6		19.0		19.0
Taxes accrued	26.4		31.3		24.3
Other current liabilities	15.7		22.4		12.3
Total Current Liabilities	230.5		441.1		280.0
Deferred Credits and Other Liabilities:
Deferred income taxes	12.3		0.0		0.0
Pension and postretirement benefit costs	52.8		40.5		59.1
Asset retirement obligations	406.9		398.7		370.0
Regulatory liabilities	21.5		23.0		24.7
Other noncurrent liabilities	26.7		28.3		6.3
Total Deferred Credits and Other Liabilities	520.2		490.5		460.1
Total Capitalization and Liabilities	2,431.6		2,409.1		2,245.6
Spire Alabama Inc [Member] | Related Party [Member]
Current Assets:
Associated companies	0.8		1.3		0.7
Accounts receivable:
Associated companies	0.8		1.3		0.7
Current Liabilities:
Notes payable	121.3		260.9		156.6
Accounts payable	$ 7.0		$ 4.4		$ 6.2

[1] Accumulated other comprehensive income (loss)

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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($) $ in Millions	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022
Non-utility property, accumulated depreciation and amortization	$ 60.6	$ 50.7	$ 41.3
Preferred stock, par value (in dollars per share)	$ 25.00	$ 25.00	$ 25.00
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00	$ 1.00
Common stock, shares authorized (in shares)	70,000,000.0	70,000,000.0	70,000,000.0
Common stock, shares issued (in shares)	52,600,000	52,500,000	52,100,000
Common Stock, shares outstanding (in shares)	52,600,000	52,500,000	52,100,000
Depositary Shares [Member]
Preferred stock, shares authorized (in shares)	10,000,000.0	10,000,000.0	10,000,000.0
Preferred stock, shares issued (in shares)	10,000,000.0	10,000,000.0	10,000,000.0
Preferred stock, shares outstanding (in shares)	10,000,000.0	10,000,000.0	10,000,000.0
Spire Missouri [Member]
Common stock, par value (in dollars per share)	$ 1.00	$ 1.00	$ 1.00
Common stock, shares authorized (in shares)	50,000,000.0	50,000,000.0	50,000,000.0
Common stock, shares issued (in shares)	25,325	25,325	24,929
Common Stock, shares outstanding (in shares)	25,325	25,325	24,929
Spire Alabama Inc [Member]
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	3.0	3.0	3.0
Common stock, shares issued (in shares)	2.0	2.0	2.0
Common Stock, shares outstanding (in shares)	2.0	2.0	2.0

XML

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, 2021	24,577						1,972,052				51,684,883
Balance at Sep. 30, 2021	$ 0.1	$ 765.0	$ 817.0	$ (4.2)	$ 1,577.9		$ 0.0	$ 328.9	$ 552.6	$ 881.5	$ 51.7	$ 242.0	$ 1,517.9	$ 843.0	$ 3.6		$ 2,658.2
Net Income	$ 0.0	0.0	143.5	0.0	143.5		0.0	0.0	74.6	74.6	$ 0.0	0.0	0.0	229.3	0.0		229.3
Common stock issued (in shares)	352										354,000
Stock issued	$ 0.0	23.3	0.0	0.0	23.3						$ 0.3	0.0	22.8	0.0	0.0		23.1
Dividend reinvestment plan (in shares)											13,269
Dividend reinvestment plan											$ 0.0	0.0	0.8	0.0	0.0		0.8
Stock-based compensation costs											$ 0.0	0.0	1.4	0.0	0.0		1.4
Stock issued under stock-based compensation plans (in shares)											91,428
Stock issued under stock-based compensation plans											$ 0.1	(0.0)	0.1	(0.0)	(0.0)		(0.0)
Employees’ tax withholding for stock-based compensation (in shares)											(26,913)
Employees’ tax withholding for stock-based compensation											$ 0.0	0.0	(1.7)	0.0	0.0		(1.7)
Temporary equity adjustment to redemption value											0.0	0.0	0.0	(1.2)	0.0		(1.2)
Common stock, dividends							$ 0.0	0.0	(16.0)	(16.0)	0.0	0.0	0.0	(71.4)	0.0		(71.4)
Preferred stock dividends											0.0	0.0	0.0	(7.4)	0.0		(7.4)
Other Comprehensive Income, Net of Tax	$ 0.0	0.0	0.0	0.2	0.2						0.0	0.0	0.0	0.0	10.1		10.1
Stock issued under stock-based compensation plans											$ (0.1)	0.0	(0.1)	0.0	0.0		0.0
Balance (in shares) at Mar. 31, 2022	24,929						1,972,052				52,116,667
Balance at Mar. 31, 2022	$ 0.1	788.3	960.5	(4.0)	1,744.9		$ 0.0	322.9	611.2	934.1	$ 52.1	242.0	1,541.1	992.3	13.7	[1]	2,841.2
Return of capital to Spire							$ 0.0	(6.0)	0.0	(6.0)
Balance (in shares) at Dec. 31, 2021	24,577						1,972,052				51,742,481
Balance at Dec. 31, 2021	$ 0.1	765.0	862.3	(4.1)	1,623.3		$ 0.0	322.9	556.8	879.7	$ 51.7	242.0	1,516.9	859.5	(0.3)	[1]	2,669.8
Net Income	$ 0.0	0.0	98.2	0.0	98.2		0.0	0.0	62.4	62.4	$ 0.0	0.0	0.0	173.6	0.0	[1]	173.6
Common stock issued (in shares)	352										354,000
Stock issued	$ 0.0	23.3	0.0	0.0	23.3						$ 0.3	0.0	22.8	0.0	0.0		23.1
Dividend reinvestment plan (in shares)											7,036
Dividend reinvestment plan											$ 0.0	0.0	0.4	0.0	0.0	[1]	0.4
Stock-based compensation costs											$ 0.0	0.0	1.1	0.0	0.0	[1]	1.1
Stock issued under stock-based compensation plans (in shares)											13,452
Stock issued under stock-based compensation plans											$ 0.1	0.0	(0.1)	0.0	0.0	[1]	0.0
Employees’ tax withholding for stock-based compensation (in shares)											(302)
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	0.0	(1.3)	0.0	[1]	(1.3)
Common stock, dividends							$ 0.0	0.0	(8.0)	(8.0)	0.0	0.0	0.0	(35.8)	0.0	[1]	(35.8)
Preferred stock dividends											0.0	0.0	0.0	(3.7)	0.0	[1]	(3.7)
Other Comprehensive Income, Net of Tax	$ 0.0	0.0	0.0	0.1	0.1						0.0	0.0	0.0	0.0	14.0		14.0
Stock issued under stock-based compensation plans											$ (0.1)	0.0	0.1	0.0	0.0	[1]	0.0
Balance (in shares) at Mar. 31, 2022	24,929						1,972,052				52,116,667
Balance at Mar. 31, 2022	$ 0.1	788.3	960.5	(4.0)	1,744.9		$ 0.0	322.9	611.2	934.1	$ 52.1	242.0	1,541.1	992.3	13.7	[1]	2,841.2
Other Comprehensive Income, Net of Tax											$ 0.0	0.0	0.0	0.0	(21.3)		(21.3)
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	[1]	$ 0.0	289.9	645.3	935.2	$ 52.6	242.0	1,576.5	1,089.5	25.9	[1]	2,986.5
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	[1]	$ 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	[1]	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
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 issued under stock-based compensation plans (in shares)											64,686
Stock issued under stock-based compensation plans											$ 0.0	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)
Preferred stock dividends											0.0	0.0	0.0	(7.4)	0.0		(7.4)
Other Comprehensive Income, Net of Tax	$ 0.0	0.0	0.0	0.2	0.2	[1]											(21.3)
Stock issued under stock-based compensation plans											$ 0.0	0.0	0.0	0.0	0.0		0.0
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	[1]	$ 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	[1]	$ 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	[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)											40,500,000,000
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 issued under stock-based compensation plans (in shares)											6,008
Stock issued under stock-based compensation plans											$ 0.0	0.0	0.0	0.0	0.0	[1]	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)
Preferred stock dividends											0.0		0.0	(3.7)	0.0	[1]	(3.7)
Other Comprehensive Income, Net of Tax	$ 0.0	0.0	0.0	0.1	0.1	[1]					0.0		0.0	0.0	(18.9)		(18.9)
Stock issued under stock-based compensation plans											$ 0.0	0.0	0.0	0.0	0.0	[1]	0.0
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	[1]	$ 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)

[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, 2023	Mar. 31, 2023
Common stock, dividends per share declared (in dollars per share)	$ 0.72	$ 1.44
Preferred stock dividends per share declared (in dollars per share)	$ 0.36875	$ 0.7375

XML

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2023		Mar. 31, 2022
Operating Activities:
Net Income	$ 270.2		$ 229.3
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	124.7		115.8
Deferred income taxes and investment tax credits	62.5		59.1
Changes in assets and liabilities:
Accounts receivable	43.7		(3.4)
Inventories	218.2		136.9
Regulatory assets and liabilities	(35.5)		(230.5)
Accounts payable	(372.9)		(21.1)
Delayed/advance customer billings, net	(76.3)		(71.4)
Taxes accrued	(10.8)		(11.2)
Other assets and liabilities	(50.6)		(51.4)
Other	6.7		3.0
Net cash provided by operating activities	179.9		155.1
Delayed/advance customer billings, net	(76.3)		(71.4)
Investing Activities:
Capital expenditures	(307.8)		(275.9)
Advance payment for business acquisition	(37.1)		0.0
Other	4.2		2.7
Net cash used in investing activities	(340.7)		(273.2)
Financing Activities:
Issuance of long-term debt	755.0		300.0
Repayment of long-term debt	(31.2)		(55.8)
Repayment of short-term debt, net	(476.5)		(64.9)
Issuance of common stock	3.6		24.0
Dividends paid on common stock	(74.5)		(70.1)
Dividends paid on preferred stock	(7.4)		(7.4)
Other financing activities	(7.5)		(3.8)
Net cash provided by financing activities	161.5		122.0
Net Increase in Cash, Cash Equivalents, and Restricted Cash	0.7		3.9
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	20.5		11.3
Cash, Cash Equivalents, and Restricted Cash at End of Period	21.2		15.2
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	(80.5)		(56.5)
Income taxes	(1.4)		(0.2)
Spire Missouri [Member]
Operating Activities:
Net Income	159.4	[1]	143.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	77.8		70.1
Deferred income taxes and investment tax credits	24.8		26.9
Changes in assets and liabilities:
Accounts receivable	(208.9)		18.2
Inventories	126.2		92.4
Regulatory assets and liabilities	0.6		(181.3)
Accounts payable	(31.5)		12.9
Delayed/advance customer billings, net	(75.4)		(70.8)
Taxes accrued	(3.2)		(3.8)
Other assets and liabilities	(47.4)		(41.7)
Other	0.8		0.7
Net cash provided by operating activities	23.2		67.1
Delayed/advance customer billings, net	(75.4)		(70.8)
Investing Activities:
Capital expenditures	(206.6)		(176.0)
Other	1.8		1.4
Net cash used in investing activities	(204.8)		(174.6)
Financing Activities:
Issuance of long-term debt	400.0		300.0
Issuance of common stock	0.0		23.3
Dividends paid on common stock	(30.0)		0.0
Other financing activities	(3.9)		(2.0)
Net cash provided by financing activities	181.6		107.5
Net Increase in Cash, Cash Equivalents, and Restricted Cash	0.0		0.0
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	0.0		0.0
Cash, Cash Equivalents, and Restricted Cash at End of Period	0.0		0.0
Issuance (repayment) of short-term debt, net	200.0		(250.0)
Borrowings from (repayments to) Spire, net	(384.5)		36.2
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	(44.1)		(28.3)
Income taxes	0.0		0.0
Spire Alabama Inc [Member]
Operating Activities:
Net Income	69.2		74.6
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	34.0		33.2
Deferred income taxes and investment tax credits	23.4		25.1
Changes in assets and liabilities:
Accounts receivable	(4.8)		(34.9)
Inventories	26.9		1.3
Regulatory assets and liabilities	(32.3)		(50.7)
Accounts payable	(39.2)		7.4
Delayed/advance customer billings, net	(0.7)		(0.6)
Taxes accrued	(4.9)		(6.1)
Other assets and liabilities	12.6		(14.2)
Other	0.2		(0.1)
Net cash provided by operating activities	84.4		35.0
Delayed/advance customer billings, net	(0.7)		(0.6)
Investing Activities:
Capital expenditures	(72.9)		(71.0)
Other	0.7		0.6
Net cash used in investing activities	(72.2)		(70.4)
Financing Activities:
Issuance of long-term debt	175.0		0.0
Repayment of long-term debt	0.0		(50.0)
Dividends paid on common stock	(21.0)		(16.0)
Other financing activities	(1.0)		0.0
Net cash provided by financing activities	(13.6)		35.6
Net Increase in Cash, Cash Equivalents, and Restricted Cash	(1.4)		0.2
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period	2.4		0.0
Cash, Cash Equivalents, and Restricted Cash at End of Period	1.0		0.2
Borrowings from (repayments to) Spire, net	(139.6)		107.6
Return of capital to Spire	(27.0)		(6.0)
Supplemental disclosure of cash paid for:
Interest, net of amounts capitalized	(12.6)		(10.1)
Income taxes	$ 0.0		$ 0.0

[1] Accumulated other comprehensive income (loss)

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Note 1 - Summary of Significant Accounting Policies

6 Months Ended

Mar. 31, 2023

Notes to Financial Statements

Significant Accounting Policies [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, 2022.

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.

Certain information is presented by reportable segment, as described below. Effective during the first quarter of fiscal 2023, the Company changed its reportable segments to reflect changes in the way its chief operating decision maker evaluates the performance of its operations, develops strategy and allocates capital resources. Specifically, Midstream, which was formerly included in Other, is now reported separately. The Company's historical segment disclosures have been recast to be consistent with the current presentation.

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 and Spire STL 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.

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,
	2023		2022		2023		2022
Spire Missouri
Purchases of natural gas from Spire Marketing	$	13.8	$	17.9	$	42.3	$	36.1
Transportation services received from Spire STL Pipeline		7.8		7.8		15.9		15.9
Sales of natural gas to Spire Marketing		0.1		—		0.1		—
Spire Alabama
Purchases of natural gas from Spire Marketing	$	—	$	—	$	1.1	$	—

RESTRICTED CASH AND OTHER INVESTMENTS – In Spire’s statement of cash flows for the period ended March 31, 2023, total Cash, Cash Equivalents, and Restricted Cash included $14.3, $14.0 and $6.9 of restricted cash reported in “Other Investments” on the Company’s balance sheet as of March 31, 2023,  September 30, 2022, and March 31, 2022, 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.

A subsidiary of Spire Storage, in the Midstream segment, acquired a natural gas storage facility in northern Oklahoma formerly known as Salt Plains Storage on April 1, 2023. This will be reflected as a business combination in Spire’s third fiscal quarter ending June 30, 2023, with the assets acquired and liabilities assumed recorded based on their fair value at the acquisition date, and goodwill, if any, measured as the excess of the purchase price over the value of the net assets acquired. Because the closing date occurred on a weekend, Spire made a refundable payment of the $37.1 preliminary purchase price in advance on Friday, March 31, 2023, which is reflected in “Other Investments” in the consolidated balance sheet as of that date and as “Advance payment for business acquisition” on the related consolidated statement of cash flows.

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,
	2023		2022		2022
Spire	$	66.3	$	77.8	$	38.8
Spire Missouri		35.4		45.6		28.7
Spire Alabama		5.2		19.2		5.0

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,	2023			2022			2023			2022			2023			2022
Allowance at beginning of period	$	34.5		$	31.4		$	28.2		$	23.8		$	5.5		$	6.7
Provision for expected credit losses		8.2			5.2			7.3			4.7			0.5			0.5
Write-offs, net of recoveries		(2.1	)		(1.5	)		(1.0	)		(1.5	)		(0.7	)		(0.1	)
Allowance at end of period	$	40.6		$	35.1		$	34.5		$	27.0		$	5.3		$	7.1

Six Months Ended March 31,	2023			2022			2023			2022			2023			2022
Allowance at beginning of period	$	31.9		$	30.3		$	24.9		$	22.6		$	6.3		$	6.6
Provision for expected credit losses		12.3			6.7			11.1			6.8			0.7			—
Write-offs, net of recoveries		(3.6	)		(1.9	)		(1.5	)		(2.4	)		(1.7	)		0.5
Allowance at end of period	$	40.6		$	35.1		$	34.5		$	27.0		$	5.3		$	7.1

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Note 2 - Revenue

6 Months Ended

Mar. 31, 2023

Notes to Financial Statements

Revenue from Contract with Customer [Text Block]

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

	Three Months Ended March 31,						Six Months Ended March 31,
	2023			2022			2023			2022
Spire
Gas Utility:
Residential	$	730.2		$	687.3		$	1,248.2		$	1,029.3
Commercial and industrial		260.3			85.6			430.9			189.4
Transportation		33.3			33.5			64.2			64.7
Off-system and other incentive		6.1			12.0			13.7			16.8
Other customer revenue		4.3			6.5			8.7			10.1
Total revenue from contracts with customers		1,034.2			824.9			1,765.7			1,310.3
Changes in accrued revenue under alternative revenue programs		20.3			(7.5	)		21.8			10.6
Total Gas Utility operating revenues		1,054.5			817.4			1,787.5			1,320.9
Gas Marketing		60.6			59.4			134.7			107.3
Midstream		16.5			13.8			31.7			26.7
Other		4.1			4.3			8.1			8.0
Total before eliminations		1,135.7			894.9			1,962.0			1,462.9
Intersegment eliminations (see Note 10, Information by Operating Segment)		(12.3	)		(14.0	)		(24.6	)		(26.6	)
Total Operating Revenues	$	1,123.4		$	880.9		$	1,937.4		$	1,436.3

Spire Missouri
Residential	$	570.0	$	529.1		$	970.6	$	776.2
Commercial and industrial		185.2		19.9			308.1		88.1
Transportation		9.9		10.1			19.0		19.3
Off-system and other incentive		4.5		11.3			9.6		15.8
Other customer revenue		4.3		3.6			6.3		5.9
Total revenue from contracts with customers		773.9		574.0			1,313.6		905.3
Changes in accrued revenue under alternative revenue programs		17.1		(2.8	)		18.6		13.8
Total Operating Revenues	$	791.0	$	571.2		$	1,332.2	$	919.1

Spire Alabama
Residential	$	135.1		$	129.9		$	231.4		$	210.0
Commercial and industrial		61.5			51.6			95.1			77.6
Transportation	20.8			20.7			40.1				40.1
Off-system and other incentive		1.7			0.6			4.1			1.0
Other customer revenue		0.7			1.9			1.9			2.7
Total revenue from contracts with customers		219.8			204.7			372.6			331.4
Changes in accrued revenue under alternative revenue programs		(1.5	)		(0.6	)		(1.9	)		(0.7	)
Total Operating Revenues	$	218.3		$	204.1		$	370.7		$	330.7

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,
	2023		2022		2023		2022
Spire	$	60.2	$	51.9	$	90.6	$	73.8
Spire Missouri		45.6		39.0		67.7		53.9
Spire Alabama		12.6		11.3		19.4		17.0

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Note 3 - Earnings Per Common Share

6 Months Ended

Mar. 31, 2023

Notes to Financial Statements

Earnings Per Share [Text Block]

	Three Months Ended March 31,				Six Months Ended March 31,
	2023		2022		2023		2022
Basic Earnings Per Common Share:
Net Income	$	179.2	$	173.6	$	270.2	$	229.3
Less: Provision for preferred dividends		3.7		3.7		7.4		7.4
Income allocated to participating securities		0.4		0.2		0.5		0.3
Income Available to Common Shareholders	$	175.1	$	169.7	$	262.3	$	221.6
Weighted Average Common Shares Outstanding (in millions)		52.5		51.8		52.5		51.7
Basic Earnings Per Common Share	$	3.33	$	3.27	$	5.00	$	4.28
Diluted Earnings Per Common Share:
Net Income	$	179.2	$	173.6	$	270.2	$	229.3
Less: Provision for preferred dividends		3.7		3.7		7.4		7.4
Income allocated to participating securities		0.4		0.2		0.5		0.3
Income Available to Common Shareholders	$	175.1	$	169.7	$	262.3	$	221.6
Weighted Average Common Shares Outstanding (in millions)		52.5		51.8		52.5		51.7
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)		52.6		51.9		52.6		51.8
Diluted Earnings Per Common Share	$	3.33	$	3.27	$	4.99	$	4.28
* 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		0.5		0.2		0.4		0.2

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Note 4 - Shareholders' Equity

6 Months Ended

Mar. 31, 2023

Notes to Financial Statements

Equity [Text Block]

4. SHAREHOLDERS’ EQUITY

ATM Program

On February 6, 2019, Spire entered into an “at-the-market” (ATM) equity distribution agreement, supplemented as of May 14, 2019, pursuant to which 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). On April 28, 2022, Spire's board approved a new authorization for the sale of additional shares with an aggregate offering price of up to $200.0 with a prospectus supplement dated May 9, 2022.

Settled sales under this ATM program are included in “Common stock issued” in the Condensed Consolidated Statements of Shareholders’ Equity. Also, in the second quarter of fiscal 2023, Spire executed forward sale agreements for 228,690 shares of its common stock, which must be settled on or before September 28, 2023. 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, 2023, it would have generated net proceeds of $16.0.

As of March 31, 2023, under the ATM program, Spire may sell additional shares with an aggregate offering price of up to $152.8 under the current Board of Directors authorization expiring May 2025.

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Note 5 - Regulatory Matters

6 Months Ended

Mar. 31, 2023

Notes to Financial Statements

Public Utilities Disclosure [Text Block]

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, 2023, September 30, 2022, and March 31, 2022.

	March 31,		September 30,		March 31,
Spire	2023		2022		2022
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	115.3	$	322.2	$	146.6
Other		27.7		33.2		17.4
Total Current Regulatory Assets		143.0		355.4		164.0
Noncurrent:
Pension and postretirement benefit costs		273.1		294.5		314.8
Cost of removal		516.4		493.7		456.3
Future income taxes due from customers		139.3		137.8		138.0
Energy efficiency		59.4		57.2		53.1
Unamortized purchased gas adjustments		181.3		—		35.2
Other		147.2		129.2		109.4
Total Noncurrent Regulatory Assets		1,316.7		1,112.4		1,106.8
Total Regulatory Assets	$	1,459.7	$	1,467.8	$	1,270.8
Regulatory Liabilities:
Current:
Other	$	5.3	$	3.7	$	3.2
Total Current Regulatory Liabilities		5.3		3.7		3.2
Noncurrent:
Deferred taxes due to customers		135.8		145.3		152.1
Pension and postretirement benefit costs		161.0		172.6		179.4
Accrued cost of removal		34.6		32.9		38.3
Unamortized purchased gas adjustments		—		53.0		17.1
Other		28.9		14.4		13.5
Total Noncurrent Regulatory Liabilities		360.3		418.2		400.4
Total Regulatory Liabilities	$	365.6	$	421.9	$	403.6

	March 31,		September 30,		March 31,
Spire Missouri	2023		2022		2022
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	58.7	$	275.1	$	112.5
Other		4.0		13.0		0.2
Total Current Regulatory Assets		62.7		288.1		112.7
Noncurrent:
Future income taxes due from customers		130.9		129.2		129.3
Pension and postretirement benefit costs		195.5		222.9		227.5
Energy efficiency		59.4		57.2		53.1
Unamortized purchased gas adjustments		181.3		—		35.2
Cost of removal		24.2		25.2		34.9
Other		130.7		113.1		92.7
Total Noncurrent Regulatory Assets		722.0		547.6		572.7
Total Regulatory Assets	$	784.7	$	835.7	$	685.4
Regulatory Liabilities:
Noncurrent:
Deferred taxes due to customers	$	121.3	$	127.9	$	134.7
Pension and postretirement benefit costs		132.7		143.6		148.3
Accrued cost of removal		—		—		5.7
Unamortized purchased gas adjustments		—		53.0		17.1
Other		22.9		7.3		7.9
Total Noncurrent Regulatory Liabilities		276.9		331.8		313.7
Total Regulatory Liabilities	$	276.9	$	331.8	$	313.7

	March 31,		September 30,		March 31,
Spire Alabama	2023		2022		2022
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	53.6	$	43.8	$	31.0
Other		11.2		13.1		10.0
Total Current Regulatory Assets		64.8		56.9		41.0
Noncurrent:
Future income taxes due from customers		2.0		2.2		2.2
Pension and postretirement benefit costs		73.1		66.5		82.0
Cost of removal		492.2		468.5		421.4
Other		1.0		1.0		1.1
Total Noncurrent Regulatory Assets		568.3		538.2		506.7
Total Regulatory Assets	$	633.1	$	595.1	$	547.7
Regulatory Liabilities:
Noncurrent:
Pension and postretirement benefit costs	$	18.0	$	19.4	$	21.1
Other		3.5		3.6		3.6
Total Noncurrent Regulatory Liabilities		21.5		23.0		24.7
Total Regulatory Liabilities	$	21.5	$	23.0	$	24.7

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,
	2023		2022		2022
Spire
Pension and postretirement benefit costs	$	127.8	$	152.9	$	152.0
Future income taxes due from customers		137.2		135.6		135.7
Unamortized purchased gas adjustments		240.0		275.1		147.7
Other		102.4		122.7		120.2
Total Regulatory Assets Not Earning a Return	$	607.4	$	686.3	$	555.6
Spire Missouri
Pension and postretirement benefit costs	$	127.8	$	152.9	$	152.0
Future income taxes due from customers		130.9		129.2		129.3
Unamortized purchased gas adjustments		240.0		275.1		147.7
Other		102.4		122.7		120.2
Total Regulatory Assets Not Earning a Return	$	601.1	$	679.9	$	549.2

Like all the Company’s regulatory assets, these regulatory assets as of March 31, 2023 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 mid- February 2021, the central U.S. experienced a period of unusually severe cold weather (“Winter Storm Uri”), and Spire Missouri implemented an Operational Flow Order (OFO) to preserve the integrity of its distribution system. During this time, Spire Missouri was required to purchase additional natural gas supply, both to ensure adequate supply for its firm utility customers, and to cover the shortfall created when third-party marketers failed to deliver natural gas supply to its city gates on behalf of their customers. In accordance with its MoPSC-approved OFO tariff, Spire Missouri invoiced the cost of gas and associated penalties totaling $195.8 to non-compliant marketers and recorded accounts receivable. Recoveries collected are an offset to cost of natural gas for firm utility customers through the Purchased Gas Adjustment (PGA) and Actual Cost Adjustment (ACA), so are net income neutral to Spire Missouri. The three largest counterparties did not remit payment when due, so Spire Missouri filed suit against them in federal court to recover the invoiced amounts. In late February 2022, the parties to the OFO waiver suits agreed to a settlement in principle, pursuant to which marketers will reimburse Spire Missouri for the actual cost of its incremental gas purchases to serve marketers’ customers during Winter Storm Uri, so Spire Missouri reduced revenue, accounts receivable, cost of gas and regulatory liabilities by approximately $150 in the second quarter of fiscal 2022. The settlement, which reduced the total amount due from the three marketers to approximately $42, was approved by the MoPSC in late May 2022, and the marketers are making payments to Spire Missouri.

In the first quarter of fiscal 2022, the MoPSC approved Spire Missouri compliance tariffs with an effective date of December 23, 2021 consistent with its order in Spire Missouri's general rate case. These new tariffs were designed to increase Spire Missouri’s aggregate annual gross base rate revenues by $72.2, which includes $24.9 incremental and $47.3 already being collected through the Infrastructure System Replacement Surcharge (ISRS). The MoPSC required Spire Missouri to defer all non-operational overheads from December 23, 2021 through September 30, 2022 into a regulatory asset totaling $42.8.

On April 1, 2022, Spire Missouri filed tariff sheets to initiate a new general rate case proceeding intended to address the deferred amounts, along with other matters. The parties reached a Full Unanimous Stipulation and Agreement (the “Stipulation”) to resolve all issues in the case, which was filed with the MoPSC on November 4, 2022. On November 18, 2022, the Stipulation was approved, including authorization of $78.0 in new base rate revenue (including $19.0 already being collected through ISRS) and recovery of deferred overheads through amortization of the related regulatory asset. New base rates became effective on December 26, 2022.

The ISRS allows Spire Missouri expedited recovery for its investment to replace qualifying components of its infrastructure without the necessity of a formal rate case. As noted above, 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. On April 20, 2023, the MoPSC approved an incremental annual ISRS revenue increase of $7.7, reflecting eligible pipe replacement from October 2022 through February 2023. This rate increase will be effective May 6, 2023.

The Utilities purchase the natural gas to be delivered to their customers and typically defer the recovery of this expense thereby lessening the immediate impact on customers’ bills of higher realized commodity costs. These deferred gas balances are expected to be recovered over the next 12 months pursuant to tariff adjustments effective in Missouri (and Alabama). Spire Missouri filed Purchase Gas Adjustment (PGA) changes to its tariff in November and January which were approved and became effective November 29, 2022 and January 19, 2023, respectively.

On May 27, 2022, the MoPSC staff filed an ACA Review Recommendation and Report for the ACA period that first includes transportation charges incurred by Spire Missouri for service on the Spire STL Pipeline. That report concluded that the transaction complied with Missouri affiliate transaction rules and was prudent, and it recommended no disallowance of any Spire STL Pipeline related costs from the ACA mechanism. On July 11, 2022, Spire Missouri filed its response comments in support of the recommendation. The Missouri Office of the Public Counsel and Environmental Defense Fund (EDF) filed comments on July 29 and August 1, 2022, respectively, raising concerns about the Spire STL Pipeline transaction, the ACA process itself, and other matters. The MoPSC has entered a scheduling order in the matter which includes an evidentiary hearing on July 25-26, 2023. On January 6, 2023, Spire Missouri filed a Partial Stipulation and Agreement resolving all other issues raised by the MoPSC staff in its Recommendation and Report. The partial stipulation was approved by the MoPSC on January 25, 2023, and will result in a $0.6 credit to the ACA balance. Issues relating to Spire STL Pipeline costs remain contested. On April 28, 2023, MoPSC Staff and its consultant filed direct testimony confirming their position that the transaction was prudent and in compliance with Missouri affiliate transaction rules. EDF also filed direct testimony arguing Spire Missouri imprudently changed the physical manner in which it receives supply and created risk for customers, and advocating for a disallowance of $27.7 in the case. No other parties filed direct testimony. Rebuttal testimony from all parties is due to be filed in late May 2023.

The MoPSC has 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 includes the impact of Winter Storm Uri on Spire Missouri's natural gas portfolio. On December 15, 2022, the MoPSC staff filed its Reports and Recommendations in these cases. Spire Missouri filed its responses to these Reports and Recommendations on January 19, 2023. The MoPSC has ordered that a status report or procedural schedule be submitted no later than May 22, 2023.

Spire Alabama

On October 26, 2022, Spire Alabama made its annual Rate Stabilization and Equalization (RSE) rate filing with the APSC, presenting the utility’s budget for the fiscal year ending September 30, 2023, including net income and a calculation of allowed return on average common equity (ROE). The budget reflected the start of amortization of the accumulated deferred income tax (ADIT) adjustment related to the Tax Cuts and Jobs Act of 2017 (TCJA). New rates designed to provide an annual revenue increase of $15.0 became effective January 1, 2023.

Spire Alabama filed GSA rate increases effective December 1, 2022, and January 1, 2023, primarily attributable to higher natural gas prices.

Spire

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

In October 2022, Spire Gulf made its annual RSE rate filing with the APSC based on its budget for fiscal 2023 and an allowed ROE of 9.95%. The budget reflected the start of amortization of the excess ADIT from the TCJA. New rates designed to provide an annual revenue increase of $2.5 became effective January 1, 2023.

On September 14, 2022, Spire Mississippi filed its Rate Stabilization Adjustment Rider with the Mississippi Public Service Commission (MSPSC) for the rate year ended June 30, 2022, which reflected an increase to annual revenues of $1.3. 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 an annual revenue increase of $0.8 through rates that became effective on January 1, 2023.

In August 2018, the FERC approved an order issuing Certificates of Public Convenience and Necessity (“FERC Certificates”) for the Spire STL Pipeline ( “August 2018 Order”). In November 2019, the FERC issued an Order on Rehearing of the August 2018 Order dismissing or denying the outstanding requests for rehearing filed by several parties, dismissing the request for stay filed by one party, and noting the withdrawal of the request for rehearing by another party. In January 2020, two of the rehearing parties filed petitions for review of the FERC’s orders with the U.S. Court of Appeals for the District of Columbia Circuit (“DC Circuit”). On June 22, 2021, the DC Circuit issued an order vacating the FERC Certificates and remanding the matter back to the FERC for further action. On September 14, 2021 and December 3, 2021, the FERC issued temporary certificates for the continued authorized operation of the Spire STL Pipeline pending the outcome of its determination on remand. On December 15, 2022, the FERC issued its order on remand reissuing permanent FERC Certificates for the continued operation of Spire STL Pipeline. On January 17, 2023, EDF requested rehearing of the December 15, 2022 FERC order, but on February 17, 2023, that rehearing request was denied by operation of law. On April 20, 2023, the FERC issued an “Order Addressing Arguments Raised on Rehearing” in which it further clarified the rationale for denying EDF's rehearing request. EDF has 60 days, or until June 19, 2023, to file an appeal with the DC Circuit or another federal appellate court.

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Note 6 - Financing

6 Months Ended

Mar. 31, 2023

Notes to Financial Statements

Debt Disclosure [Text Block]

Short-term

Spire, Spire Missouri and Spire Alabama have a syndicated revolving credit facility pursuant to a loan agreement with 12 banks, which was amended July 22, 2022, to increase the commitment and sublimits and extend the agreement through July 22, 2027. The amended loan 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, 2023, total debt was less than 65% of total capitalization for each borrower. There were no borrowings against this credit facility as of March 31, 2023.

Spire utilizes a commercial paper program (“CP Program”) pursuant to which Spire 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.

In March 2021, Spire Missouri entered into a loan agreement with several banks for a $250.0, 364-day unsecured term loan with an interest rate based on LIBOR plus 65 basis points. The loan was repaid in March 2022.

On January 5, 2023, Spire Missouri entered into a loan agreement with several banks for a $250.0 unsecured term loan due October 5, 2023. Interest accrues at either, as selected by the Company, a base rate or an adjusted forward-looking secured overnight financing rate (“SOFR”). Adjusted SOFR is based on one- or three-month term SOFR, as selected by the Company, plus a SOFR adjustment of 0.10% per annum plus a margin of 0.80% per annum.

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, 2023, $224.2 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, 2023
Highest borrowings outstanding	$	1,282.0		$	250.0		$	656.9		$	274.0		$	1,482.0
Lowest borrowings outstanding		354.4			—			3.8			76.7			554.4
Weighted average borrowings		922.7			111.0			383.6			134.9			1,033.7
Weighted average interest rate		4.6	%		5.4	%		4.5	%		4.6	%		4.7	%
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	%
As of September 30, 2022
Borrowings outstanding	$	1,037.5		$	—		$	445.3		$	260.9		$	1,037.5
Weighted average interest rate		3.3	%		0.0	%		3.3	%		3.3	%		3.3	%
As of March 31, 2022
Borrowings outstanding	$	607.1		$	—		$	277.2		$	156.6		$	607.1
Weighted average interest rate		0.9	%		0.0	%		0.9	%		0.9	%		0.9	%

Long-term

The long-term debt agreements of Spire, Spire Missouri and Spire Alabama contain customary financial covenants and default provisions. As of March 31, 2023, 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,
	2023		2022		2023		2022
Spire	$	1.9	$	1.0	$	3.5	$	2.1
Spire Missouri		0.6		0.1		1.1		0.1
Spire Alabama		0.6		0.8		1.3		1.6

On  October 13, 2022, Spire Alabama issued $90.0 of notes due  October 15, 2029, bearing interest at 5.32% and $85.0 of notes due  October 15, 2032, bearing interest at 5.41%. Interest is payable semi-annually. The notes are senior unsecured obligations and rank equal in right to payment with all other senior unsecured indebtedness of Spire Alabama. Also on  October 13, 2022, Spire Gulf issued $30.0 of first mortgage bonds due  October 15, 2037, bearing interest at 5.61% payable semi-annually. The bonds rank equal in right to payment with the other first mortgage bonds issued by Spire Gulf. The bonds were issued under a supplemental indenture with collateral fall away provisions whereby, under certain conditions, Spire Gulf  may elect to exchange the bonds, which are secured, for unsecured notes.

On February 13, 2023, Spire Missouri issued $400.0 aggregate principal amount of its 4.800% Series First Mortgage Bonds due 2033. Interest is payable semi-annually. The notes are senior secured indebtedness of Spire Missouri and rank equally with all other existing and future senior secured indebtedness issued by Spire Missouri under its mortgage and deed of trust. The bonds are secured by a first mortgage lien on substantially all of the real properties of Spire Missouri, subject to limited exceptions.

On March 7, 2023, Spire issued $150.0 aggregate principal amount of its 5.80% Series 2023 Senior Notes due March 15, 2033. Interest is payable semi-annually. The notes are senior unsecured obligations of the Company.

In the quarter ended March 31, 2023, the company settled interest rate swap contracts with a notional amount of $325.0 and a realized gain of $39.5. This gain will be amortized against the interest expense related to the 10-year debt issued during that quarter (described in the previous two paragraphs).

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Note 7 - Fair Value of Financial Instruments

6 Months Ended

Mar. 31, 2023

Notes to Financial Statements

Fair Value Disclosures [Text Block]

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, 2023, September 30, 2022, and March 31, 2022.

					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, 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
As of September 30, 2022
Cash and cash equivalents	$	6.5	$	6.5	$	6.5	$	—
Notes payable		1,037.5		1,037.5		—		1,037.5
Long-term debt, including current portion		3,239.7		2,851.8		—		2,851.8
As of March 31, 2022
Cash and cash equivalents	$	8.3	$	8.3	$	8.3	$	—
Notes payable		607.1		607.1		—		607.1
Long-term debt, including current portion		3,238.5		3,299.1		—		3,299.1
Spire Missouri
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
As of September 30, 2022
Notes payable – associated companies	$	445.3	$	445.3	$	—	$	445.3
Long-term debt, including current portion		1,637.7		1,473.9		—		1,473.9
As of March 31, 2022
Notes payable – associated companies	$	277.2	$	277.2	$	—	$	277.2
Long-term debt		1,637.1		1,691.9		—		1,691.9
Spire Alabama
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
As of September 30, 2022
Cash and cash equivalents	$	2.4	$	2.4	$	2.4	$	—
Notes payable – associated companies		260.9		260.9		—		260.9
Long-term debt		571.5		485.0		—		485.0
As of March 31, 2022
Cash and cash equivalents	$	0.2	$	0.2	$	0.2	$	—
Notes payable – associated companies		156.6		156.6		—		156.6
Long-term debt		571.4		588.0		—		588.0

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Note 8 - Fair Value Measurements

6 Months Ended

Mar. 31, 2023

Notes to Financial Statements

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

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 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 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, 2023, September 30, 2022, and March 31, 2022. 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, 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	$	137.6	$	—	$	(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	$	145.9	$	—	$	(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 September 30, 2022
ASSETS
Gas Utility:
U.S. stock/bond mutual funds	$	19.1	$	—	$	—		$	19.1
NYMEX/ICE natural gas contracts		57.8		—		(57.8	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		91.8		—		(91.8	)		—
Natural gas commodity contracts		56.6		—		(4.0	)		52.6
Other:
U.S. stock/bond mutual funds		29.3		—		—			29.3
Interest rate swaps		63.6		—		—			63.6
Total	$	318.2	$	—	$	(153.6	)	$	164.6
LIABILITIES
Gas Utility:
NYMEX/ICE natural gas contracts	$	30.7	$	—	$	(30.7	)	$	—
Gas Marketing:
NYMEX/ICE natural gas contracts		82.3		—		(82.3	)		—
Natural gas commodity contracts		65.5		—		(4.0	)		61.5
Total	$	178.5	$	—	$	(117.0	)	$	61.5
As of March 31, 2022
ASSETS
Gas Utility:
U.S. stock/bond mutual funds	$	23.0	$	—	$	—		$	23.0
NYMEX/ICE natural gas contracts		58.9		—		(58.9	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		96.1		—		(88.4	)		7.7
Natural gas commodity contracts		30.8		—		(1.0	)		29.8
Other:
U.S. stock/bond mutual funds		24.1		—		—			24.1
Interest rate swaps		28.8		—		(7.9	)		20.9
Total	$	261.7	$	—	$	(156.2	)	$	105.5
LIABILITIES
Gas Marketing:
NYMEX/ICE natural gas contracts	$	40.4	$	—	$	(40.4	)	$	—
Natural gas commodity contracts		106.2		—		(1.0	)		105.2
Other:
Interest rate swaps		7.9		—		(7.9	)		—
Total	$	154.5	$	—	$	(49.3	)	$	105.2

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, 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	)	$	—
As of September 30, 2022
ASSETS
U.S. stock/bond mutual funds	$	19.1	$	—	$	—		$	19.1
NYMEX/ICE natural gas contracts		57.8		—		(57.8	)		—
Total	$	76.9	$	—	$	(57.8	)	$	19.1
LIABILITIES
NYMEX/ICE natural gas contracts	$	30.7	$	—	$	(30.7	)	$	—
As of March 31, 2022
ASSETS
U.S. stock/bond mutual funds	$	23.0	$	—	$	—		$	23.0
NYMEX/ICE natural gas contracts		58.9		—		(58.9	)		—
Total	$	81.9	$	—	$	(58.9	)	$	23.0

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Note 9 - Pension Plans and Other Postretirement Benefits

6 Months Ended

Mar. 31, 2023

Notes to Financial Statements

Retirement Benefits [Text Block]

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,
	2023			2022			2023			2022
Spire
Service cost – benefits earned during the period	$	3.9		$	5.4		$	8.0		$	10.8
Interest cost on projected benefit obligation		5.9			5.3			12.3			10.4
Expected return on plan assets		(5.7	)		(8.2	)		(12.1	)		(16.4	)
Amortization of prior service credit		(1.2	)		(1.2	)		(2.3	)		(2.3	)
Amortization of actuarial loss		1.6			3.6			3.2			7.3
Loss on lump-sum settlements		—			11.7			8.6			11.7
Subtotal		4.5			16.6			17.7			21.5
Regulatory adjustment		10.4			(1.2	)		12.2			9.4
Net pension cost	$	14.9		$	15.4		$	29.9		$	30.9
Spire Missouri
Service cost – benefits earned during the period	$	2.9		$	3.8		$	5.7		$	7.7
Interest cost on projected benefit obligation		4.4			3.6			8.9			7.1
Expected return on plan assets		(4.5	)		(5.9	)		(9.0	)		(11.9	)
Amortization of prior service credit		(0.5	)		(0.5	)		(1.0	)		(1.0	)
Amortization of actuarial loss		1.6			2.8			3.1			5.6
Loss on lump-sum settlements		—			6.8			—			6.8
Subtotal		3.9			10.6			7.7			14.3
Regulatory adjustment		8.1			1.1			16.2			9.6
Net pension cost	$	12.0		$	11.7		$	23.9		$	23.9
Spire Alabama
Service cost – benefits earned during the period	$	0.8		$	1.3		$	1.9		$	2.7
Interest cost on projected benefit obligation		0.8			1.2			2.1			2.3
Expected return on plan assets		(0.5	)		(1.4	)		(1.6	)		(2.8	)
Amortization of prior service credit		(0.6	)		(0.6	)		(1.2	)		(1.2	)
Amortization of actuarial loss		0.2			0.8			0.3			1.7
Loss on lump-sum settlements		—			4.9			8.6			4.9
Subtotal		0.7			6.2			10.1			7.6
Regulatory adjustment		2.1			(2.5	)		(4.4	)		(0.6	)
Net pension cost	$	2.8		$	3.7		$	5.7		$	7.0

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, 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 settlement resulted in a loss of $8.6 for Spire Alabama. For the remeasurement, the discount rate for both of the Spire Alabama plans was updated to 5.6%, from 5.7% for one plan and 5.65% for the other plan, at September 30, 2022. 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. 

For the three and six months ended March 31, 2022, one Spire Missouri plan and two Spire Alabama plans met the criteria for settlement recognition. The lump-sum payments recognized as settlements for the remeasurement were $21.6 for the Spire Missouri plan and $17.4 for the Spire Alabama plans. The lump-sum settlement resulted in losses of $6.8 and $4.9 for Spire Missouri and Spire Alabama, respectively. For the remeasurement, the discount rate for the Spire Missouri plan was updated to 3.6% from 3.0% at September 30, 2021, and the discount rate for the Spire Alabama plans were updated to 3.6% from 3.0% for the first plan and 3.1% for the second plan at September 30, 2021. 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, 12.3 years for the one plan and 12.6 years for the second plan. Therefore, no lump sum settlement expense was recorded in the period ended March 31, 2022.

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. 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.

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 2023 contributions to Spire Missouri’s pension plans through March 31, 2023 were $23.2 to the qualified trusts and none to non-qualified plans. Fiscal 2023 contributions to the Spire Alabama pension plans through March 31, 2023 were $0.8. Contributions to the qualified trusts of Spire Missouri’s pension plans for the remainder of fiscal 2023 are anticipated to be $21.3. Contributions to Spire Alabama’s pension plans for the remainder of fiscal 2023 are anticipated to be $13.0.

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,
	2023			2022			2023			2022
Spire
Service cost – benefits earned during the period	$	1.2		$	2.0		$	2.4		$	3.9
Interest cost on accumulated postretirement benefit obligation		2.2			1.5			4.3			3.0
Expected return on plan assets		(3.9	)		(4.3	)		(7.8	)		(8.5	)
Amortization of prior service cost		—			0.2			0.1			0.5
Amortization of actuarial gain		(1.1	)		(0.6	)		(2.1	)		(1.2	)
Subtotal		(1.6	)		(1.2	)		(3.1	)		(2.3	)
Regulatory adjustment		0.2			0.1			0.3			3.3
Net postretirement benefit (income) cost	$	(1.4	)	$	(1.1	)	$	(2.8	)	$	1.0
Spire Missouri
Service cost – benefits earned during the period	$	1.0		$	1.6		$	2.0		$	3.2
Interest cost on accumulated postretirement benefit obligation		1.7			1.1			3.3			2.2
Expected return on plan assets		(2.7	)		(2.9	)		(5.3	)		(5.7	)
Amortization of prior service cost		0.1			0.2			0.3			0.4
Amortization of actuarial gain		(0.8	)		(0.5	)		(1.6	)		(1.0	)
Subtotal		(0.7	)		(0.5	)		(1.3	)		(0.9	)
Regulatory adjustment		0.7			0.5			1.3			4.1
Net postretirement benefit cost	$	—		$	—		$	—		$	3.2
Spire Alabama
Service cost – benefits earned during the period	$	0.1		$	0.3		$	0.3		$	0.6
Interest cost on accumulated postretirement benefit obligation		0.5			0.3			0.9			0.7
Expected return on plan assets		(1.3	)		(1.3	)		(2.5	)		(2.6	)
Amortization of prior service (credit) cost		(0.1	)		—			(0.2	)		0.1
Amortization of actuarial gain		(0.2	)		—			(0.3	)		—
Subtotal		(1.0	)		(0.7	)		(1.8	)		(1.2	)
Regulatory adjustment		(0.4	)		(0.4	)		(0.9	)		(0.9	)
Net postretirement benefit income	$	(1.4	)	$	(1.1	)	$	(2.7	)	$	(2.1	)

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.

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, 2023 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, 2023

Notes to Financial Statements

Segment Reporting Disclosure [Text Block]

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 STL Pipeline, a subsidiary of Spire providing interstate natural gas pipeline transportation services, and Spire Storage, a subsidiary of Spire providing interstate natural gas storage services. 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, sales of natural gas from Spire Missouri to Spire Marketing, propane transportation services provided by Spire NGL Inc. to Spire Missouri, and natural gas transportation services provided by Spire STL Pipeline to Spire Missouri.

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, 2023
Operating Revenues:
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
Operating Expenses:
Natural gas		543.3		51.5		—		—			(8.3	)		586.5
Operation and maintenance		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
Total Operating Expenses		803.2		58.2		9.0		5.0			(12.3	)		863.1
Operating Income (Loss)	$	251.3	$	2.4	$	7.5	$	(0.9	)	$	—		$	260.3
Net Economic Earnings (Loss)	$	183.9	$	21.8	$	4.2	$	(10.7	)	$	—		$	199.2

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Three Months Ended March 31, 2022
Operating Revenues:
Revenues from external customers	$	817.4	$	59.4	$	4.0	$	0.1		$	—		$	880.9
Intersegment revenues		—		—		9.8		4.2			(14.0	)		—
Total Operating Revenues		817.4		59.4		13.8		4.3			(14.0	)		880.9
Operating Expenses:
Natural gas		356.0		45.8		—		—			(9.8	)		392.0
Operation and maintenance		104.2		3.2		5.8		4.2			(4.2	)		113.2
Depreciation and amortization		56.5		0.4		1.9		0.1			—			58.9
Taxes, other than income taxes		70.3		0.4		0.9		—			—			71.6
Total Operating Expenses		587.0		49.8		8.6		4.3			(14.0	)		635.7
Operating Income	$	230.4	$	9.6	$	5.2	$	—		$	—		$	245.2
Net Economic Earnings (Loss)	$	169.2	$	14.4	$	3.0	$	(5.6	)	$	—		$	181.0

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Six Months Ended March 31, 2023
Operating Revenues:
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
Operating Expenses:
Natural gas		944.9		77.5		—		—			(16.7	)		1,005.7
Operation and maintenance		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
Total Operating Expenses		1,434.3		90.9		17.1		9.2			(24.6	)		1,526.9
Operating Income (Loss)	$	353.2	$	43.8	$	14.6	$	(1.1	)	$	—		$	410.5
Net Economic Earnings (Loss)	$	246.8	$	47.5	$	8.0	$	(18.0	)	$	—		$	284.3

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Six Months Ended March 31, 2022
Operating Revenues:
Revenues from external customers	$	1,320.9	$	107.3	$	7.8	$	0.3		$	—		$	1,436.3
Intersegment revenues		—		—		18.9		7.7			(26.6	)		—
Total Operating Revenues		1,320.9		107.3		26.7		8.0			(26.6	)		1,436.3
Operating Expenses:
Natural gas		566.2		93.8		—		—			(18.8	)		641.2
Operation and maintenance		211.5		5.9		11.6		8.4			(7.8	)		229.6
Depreciation and amortization		111.1		0.7		3.8		0.2			—			115.8
Taxes, other than income taxes		107.3		0.4		1.5		—			—			109.2
Total Operating Expenses		996.1		100.8		16.9		8.6			(26.6	)		1,095.8
Operating Income (Loss)	$	324.8	$	6.5	$	9.8	$	(0.6	)	$	—		$	340.5
Net Economic Earnings (Loss)	$	236.4	$	14.9	$	5.5	$	(13.2	)	$	—		$	243.6

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

	Three Months Ended March 31,						Six Months Ended March 31,
	2023			2022			2023			2022
Net Income	$	179.2		$	173.6		$	270.2		$	229.3
Adjustments, pre-tax:
Fair value and timing adjustments		26.6			9.9			18.8			13.6
Income tax adjustments		(6.6	)		(2.5	)		(4.7	)		0.7
Net Economic Earnings	$	199.2		$	181.0		$	284.3		$	243.6

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

	March 31,			September 30,			March 31,
	2023			2022			2022
Total Assets:
Gas Utility	$	8,317.6		$	8,042.8		$	7,684.1
Gas Marketing		335.0			638.7			431.1
Midstream		506.2			446.0			420.3
Other		1,959.1			2,449.2			2,123.5
Eliminations		(1,068.9	)		(1,493.0	)		(1,257.7	)
Total Assets	$	10,049.0		$	10,083.7		$	9,401.3

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Note 11 - Commitments and Contingencies

6 Months Ended

Mar. 31, 2023

Notes to Financial Statements

Commitments and Contingencies Disclosure [Text Block]

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, 2023, are estimated at $1,551.7, $1,133.0, and $233.4 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 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, 2023, the remaining unfunded commitment was $7.7.

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.

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, and it is possible that final settlement amounts may materially differ from the current estimate.

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Significant Accounting Policies (Policies)

6 Months Ended

Mar. 31, 2023

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, 2022.

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.

Certain information is presented by reportable segment, as described below. Effective during the first quarter of fiscal 2023, the Company changed its reportable segments to reflect changes in the way its chief operating decision maker evaluates the performance of its operations, develops strategy and allocates capital resources. Specifically, Midstream, which was formerly included in Other, is now reported separately. The Company's historical segment disclosures have been recast to be consistent with the current presentation.

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 and Spire STL 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.

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,
	2023		2022		2023		2022
Spire Missouri
Purchases of natural gas from Spire Marketing	$	13.8	$	17.9	$	42.3	$	36.1
Transportation services received from Spire STL Pipeline		7.8		7.8		15.9		15.9
Sales of natural gas to Spire Marketing		0.1		—		0.1		—
Spire Alabama
Purchases of natural gas from Spire Marketing	$	—	$	—	$	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, 2023, total Cash, Cash Equivalents, and Restricted Cash included $14.3, $14.0 and $6.9 of restricted cash reported in “Other Investments” on the Company’s balance sheet as of March 31, 2023,  September 30, 2022, and March 31, 2022, 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.

A subsidiary of Spire Storage, in the Midstream segment, acquired a natural gas storage facility in northern Oklahoma formerly known as Salt Plains Storage on April 1, 2023. This will be reflected as a business combination in Spire’s third fiscal quarter ending June 30, 2023, with the assets acquired and liabilities assumed recorded based on their fair value at the acquisition date, and goodwill, if any, measured as the excess of the purchase price over the value of the net assets acquired. Because the closing date occurred on a weekend, Spire made a refundable payment of the $37.1 preliminary purchase price in advance on Friday, March 31, 2023, which is reflected in “Other Investments” in the consolidated balance sheet as of that date and as “Advance payment for business acquisition” on the related consolidated statement of cash flows.

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,
	2023		2022		2022
Spire	$	66.3	$	77.8	$	38.8
Spire Missouri		35.4		45.6		28.7
Spire Alabama		5.2		19.2		5.0

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,	2023			2022			2023			2022			2023			2022
Allowance at beginning of period	$	34.5		$	31.4		$	28.2		$	23.8		$	5.5		$	6.7
Provision for expected credit losses		8.2			5.2			7.3			4.7			0.5			0.5
Write-offs, net of recoveries		(2.1	)		(1.5	)		(1.0	)		(1.5	)		(0.7	)		(0.1	)
Allowance at end of period	$	40.6		$	35.1		$	34.5		$	27.0		$	5.3		$	7.1

Six Months Ended March 31,	2023			2022			2023			2022			2023			2022
Allowance at beginning of period	$	31.9		$	30.3		$	24.9		$	22.6		$	6.3		$	6.6
Provision for expected credit losses		12.3			6.7			11.1			6.8			0.7			—
Write-offs, net of recoveries		(3.6	)		(1.9	)		(1.5	)		(2.4	)		(1.7	)		0.5
Allowance at end of period	$	40.6		$	35.1		$	34.5		$	27.0		$	5.3		$	7.1

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Note 1 - Summary of Significant Accounting Policies (Tables)

6 Months Ended

Mar. 31, 2023

Notes Tables

Schedule of Related Party Transactions [Table Text Block]

	Three Months Ended March 31,				Six Months Ended March 31,
	2023		2022		2023		2022
Spire Missouri
Purchases of natural gas from Spire Marketing	$	13.8	$	17.9	$	42.3	$	36.1
Transportation services received from Spire STL Pipeline		7.8		7.8		15.9		15.9
Sales of natural gas to Spire Marketing		0.1		—		0.1		—
Spire Alabama
Purchases of natural gas from Spire Marketing	$	—	$	—	$	1.1	$	—

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

	March 31,		September 30,		March 31,
	2023		2022		2022
Spire	$	66.3	$	77.8	$	38.8
Spire Missouri		35.4		45.6		28.7
Spire Alabama		5.2		19.2		5.0

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

	Spire						Spire Missouri						Spire Alabama
Three Months Ended March 31,	2023			2022			2023			2022			2023			2022
Allowance at beginning of period	$	34.5		$	31.4		$	28.2		$	23.8		$	5.5		$	6.7
Provision for expected credit losses		8.2			5.2			7.3			4.7			0.5			0.5
Write-offs, net of recoveries		(2.1	)		(1.5	)		(1.0	)		(1.5	)		(0.7	)		(0.1	)
Allowance at end of period	$	40.6		$	35.1		$	34.5		$	27.0		$	5.3		$	7.1

Six Months Ended March 31,	2023			2022			2023			2022			2023			2022
Allowance at beginning of period	$	31.9		$	30.3		$	24.9		$	22.6		$	6.3		$	6.6
Provision for expected credit losses		12.3			6.7			11.1			6.8			0.7			—
Write-offs, net of recoveries		(3.6	)		(1.9	)		(1.5	)		(2.4	)		(1.7	)		0.5
Allowance at end of period	$	40.6		$	35.1		$	34.5		$	27.0		$	5.3		$	7.1

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Note 2 - Revenue (Tables)

6 Months Ended

Mar. 31, 2023

Notes Tables

Disaggregation of Revenue [Table Text Block]

	Three Months Ended March 31,						Six Months Ended March 31,
	2023			2022			2023			2022
Spire
Gas Utility:
Residential	$	730.2		$	687.3		$	1,248.2		$	1,029.3
Commercial and industrial		260.3			85.6			430.9			189.4
Transportation		33.3			33.5			64.2			64.7
Off-system and other incentive		6.1			12.0			13.7			16.8
Other customer revenue		4.3			6.5			8.7			10.1
Total revenue from contracts with customers		1,034.2			824.9			1,765.7			1,310.3
Changes in accrued revenue under alternative revenue programs		20.3			(7.5	)		21.8			10.6
Total Gas Utility operating revenues		1,054.5			817.4			1,787.5			1,320.9
Gas Marketing		60.6			59.4			134.7			107.3
Midstream		16.5			13.8			31.7			26.7
Other		4.1			4.3			8.1			8.0
Total before eliminations		1,135.7			894.9			1,962.0			1,462.9
Intersegment eliminations (see Note 10, Information by Operating Segment)		(12.3	)		(14.0	)		(24.6	)		(26.6	)
Total Operating Revenues	$	1,123.4		$	880.9		$	1,937.4		$	1,436.3

Spire Missouri
Residential	$	570.0	$	529.1		$	970.6	$	776.2
Commercial and industrial		185.2		19.9			308.1		88.1
Transportation		9.9		10.1			19.0		19.3
Off-system and other incentive		4.5		11.3			9.6		15.8
Other customer revenue		4.3		3.6			6.3		5.9
Total revenue from contracts with customers		773.9		574.0			1,313.6		905.3
Changes in accrued revenue under alternative revenue programs		17.1		(2.8	)		18.6		13.8
Total Operating Revenues	$	791.0	$	571.2		$	1,332.2	$	919.1

Spire Alabama
Residential	$	135.1		$	129.9		$	231.4		$	210.0
Commercial and industrial		61.5			51.6			95.1			77.6
Transportation	20.8			20.7			40.1				40.1
Off-system and other incentive		1.7			0.6			4.1			1.0
Other customer revenue		0.7			1.9			1.9			2.7
Total revenue from contracts with customers		219.8			204.7			372.6			331.4
Changes in accrued revenue under alternative revenue programs		(1.5	)		(0.6	)		(1.9	)		(0.7	)
Total Operating Revenues	$	218.3		$	204.1		$	370.7		$	330.7

Schedule Of Taxes On Revenues [Table Text Block]

	Three Months Ended March 31,				Six Months Ended March 31,
	2023		2022		2023		2022
Spire	$	60.2	$	51.9	$	90.6	$	73.8
Spire Missouri		45.6		39.0		67.7		53.9
Spire Alabama		12.6		11.3		19.4		17.0

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Note 3 - Earnings Per Common Share (Tables)

6 Months Ended

Mar. 31, 2023

Notes Tables

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

	Three Months Ended March 31,				Six Months Ended March 31,
	2023		2022		2023		2022
Basic Earnings Per Common Share:
Net Income	$	179.2	$	173.6	$	270.2	$	229.3
Less: Provision for preferred dividends		3.7		3.7		7.4		7.4
Income allocated to participating securities		0.4		0.2		0.5		0.3
Income Available to Common Shareholders	$	175.1	$	169.7	$	262.3	$	221.6
Weighted Average Common Shares Outstanding (in millions)		52.5		51.8		52.5		51.7
Basic Earnings Per Common Share	$	3.33	$	3.27	$	5.00	$	4.28
Diluted Earnings Per Common Share:
Net Income	$	179.2	$	173.6	$	270.2	$	229.3
Less: Provision for preferred dividends		3.7		3.7		7.4		7.4
Income allocated to participating securities		0.4		0.2		0.5		0.3
Income Available to Common Shareholders	$	175.1	$	169.7	$	262.3	$	221.6
Weighted Average Common Shares Outstanding (in millions)		52.5		51.8		52.5		51.7
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)		52.6		51.9		52.6		51.8
Diluted Earnings Per Common Share	$	3.33	$	3.27	$	4.99	$	4.28
* 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		0.5		0.2		0.4		0.2

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Note 5 - Regulatory Matters (Tables)

6 Months Ended

Mar. 31, 2023

Notes Tables

Schedule of Regulatory Assets and Liabilities [Table Text Block]

	March 31,		September 30,		March 31,
Spire	2023		2022		2022
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	115.3	$	322.2	$	146.6
Other		27.7		33.2		17.4
Total Current Regulatory Assets		143.0		355.4		164.0
Noncurrent:
Pension and postretirement benefit costs		273.1		294.5		314.8
Cost of removal		516.4		493.7		456.3
Future income taxes due from customers		139.3		137.8		138.0
Energy efficiency		59.4		57.2		53.1
Unamortized purchased gas adjustments		181.3		—		35.2
Other		147.2		129.2		109.4
Total Noncurrent Regulatory Assets		1,316.7		1,112.4		1,106.8
Total Regulatory Assets	$	1,459.7	$	1,467.8	$	1,270.8
Regulatory Liabilities:
Current:
Other	$	5.3	$	3.7	$	3.2
Total Current Regulatory Liabilities		5.3		3.7		3.2
Noncurrent:
Deferred taxes due to customers		135.8		145.3		152.1
Pension and postretirement benefit costs		161.0		172.6		179.4
Accrued cost of removal		34.6		32.9		38.3
Unamortized purchased gas adjustments		—		53.0		17.1
Other		28.9		14.4		13.5
Total Noncurrent Regulatory Liabilities		360.3		418.2		400.4
Total Regulatory Liabilities	$	365.6	$	421.9	$	403.6

	March 31,		September 30,		March 31,
Spire Missouri	2023		2022		2022
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	58.7	$	275.1	$	112.5
Other		4.0		13.0		0.2
Total Current Regulatory Assets		62.7		288.1		112.7
Noncurrent:
Future income taxes due from customers		130.9		129.2		129.3
Pension and postretirement benefit costs		195.5		222.9		227.5
Energy efficiency		59.4		57.2		53.1
Unamortized purchased gas adjustments		181.3		—		35.2
Cost of removal		24.2		25.2		34.9
Other		130.7		113.1		92.7
Total Noncurrent Regulatory Assets		722.0		547.6		572.7
Total Regulatory Assets	$	784.7	$	835.7	$	685.4
Regulatory Liabilities:
Noncurrent:
Deferred taxes due to customers	$	121.3	$	127.9	$	134.7
Pension and postretirement benefit costs		132.7		143.6		148.3
Accrued cost of removal		—		—		5.7
Unamortized purchased gas adjustments		—		53.0		17.1
Other		22.9		7.3		7.9
Total Noncurrent Regulatory Liabilities		276.9		331.8		313.7
Total Regulatory Liabilities	$	276.9	$	331.8	$	313.7

	March 31,		September 30,		March 31,
Spire Alabama	2023		2022		2022
Regulatory Assets:
Current:
Unamortized purchased gas adjustments	$	53.6	$	43.8	$	31.0
Other		11.2		13.1		10.0
Total Current Regulatory Assets		64.8		56.9		41.0
Noncurrent:
Future income taxes due from customers		2.0		2.2		2.2
Pension and postretirement benefit costs		73.1		66.5		82.0
Cost of removal		492.2		468.5		421.4
Other		1.0		1.0		1.1
Total Noncurrent Regulatory Assets		568.3		538.2		506.7
Total Regulatory Assets	$	633.1	$	595.1	$	547.7
Regulatory Liabilities:
Noncurrent:
Pension and postretirement benefit costs	$	18.0	$	19.4	$	21.1
Other		3.5		3.6		3.6
Total Noncurrent Regulatory Liabilities		21.5		23.0		24.7
Total Regulatory Liabilities	$	21.5	$	23.0	$	24.7

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

	March 31,		September 30,		March 31,
	2023		2022		2022
Spire
Pension and postretirement benefit costs	$	127.8	$	152.9	$	152.0
Future income taxes due from customers		137.2		135.6		135.7
Unamortized purchased gas adjustments		240.0		275.1		147.7
Other		102.4		122.7		120.2
Total Regulatory Assets Not Earning a Return	$	607.4	$	686.3	$	555.6
Spire Missouri
Pension and postretirement benefit costs	$	127.8	$	152.9	$	152.0
Future income taxes due from customers		130.9		129.2		129.3
Unamortized purchased gas adjustments		240.0		275.1		147.7
Other		102.4		122.7		120.2
Total Regulatory Assets Not Earning a Return	$	601.1	$	679.9	$	549.2

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Note 6 - Financing (Tables)

6 Months Ended

Mar. 31, 2023

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, 2023
Highest borrowings outstanding	$	1,282.0		$	250.0		$	656.9		$	274.0		$	1,482.0
Lowest borrowings outstanding		354.4			—			3.8			76.7			554.4
Weighted average borrowings		922.7			111.0			383.6			134.9			1,033.7
Weighted average interest rate		4.6	%		5.4	%		4.5	%		4.6	%		4.7	%
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	%
As of September 30, 2022
Borrowings outstanding	$	1,037.5		$	—		$	445.3		$	260.9		$	1,037.5
Weighted average interest rate		3.3	%		0.0	%		3.3	%		3.3	%		3.3	%
As of March 31, 2022
Borrowings outstanding	$	607.1		$	—		$	277.2		$	156.6		$	607.1
Weighted average interest rate		0.9	%		0.0	%		0.9	%		0.9	%		0.9	%

Summary Of Capitalized Interest [Table Text Block]

	Three Months Ended March 31,				Six Months Ended March 31,
	2023		2022		2023		2022
Spire	$	1.9	$	1.0	$	3.5	$	2.1
Spire Missouri		0.6		0.1		1.1		0.1
Spire Alabama		0.6		0.8		1.3		1.6

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Note 7 - Fair Value of Financial Instruments (Tables)

6 Months Ended

Mar. 31, 2023

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, 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
As of September 30, 2022
Cash and cash equivalents	$	6.5	$	6.5	$	6.5	$	—
Notes payable		1,037.5		1,037.5		—		1,037.5
Long-term debt, including current portion		3,239.7		2,851.8		—		2,851.8
As of March 31, 2022
Cash and cash equivalents	$	8.3	$	8.3	$	8.3	$	—
Notes payable		607.1		607.1		—		607.1
Long-term debt, including current portion		3,238.5		3,299.1		—		3,299.1
Spire Missouri
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
As of September 30, 2022
Notes payable – associated companies	$	445.3	$	445.3	$	—	$	445.3
Long-term debt, including current portion		1,637.7		1,473.9		—		1,473.9
As of March 31, 2022
Notes payable – associated companies	$	277.2	$	277.2	$	—	$	277.2
Long-term debt		1,637.1		1,691.9		—		1,691.9
Spire Alabama
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
As of September 30, 2022
Cash and cash equivalents	$	2.4	$	2.4	$	2.4	$	—
Notes payable – associated companies		260.9		260.9		—		260.9
Long-term debt		571.5		485.0		—		485.0
As of March 31, 2022
Cash and cash equivalents	$	0.2	$	0.2	$	0.2	$	—
Notes payable – associated companies		156.6		156.6		—		156.6
Long-term debt		571.4		588.0		—		588.0

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Note 8 - Fair Value Measurements (Tables)

6 Months Ended

Mar. 31, 2023

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, 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	$	137.6	$	—	$	(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	$	145.9	$	—	$	(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 September 30, 2022
ASSETS
Gas Utility:
U.S. stock/bond mutual funds	$	19.1	$	—	$	—		$	19.1
NYMEX/ICE natural gas contracts		57.8		—		(57.8	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		91.8		—		(91.8	)		—
Natural gas commodity contracts		56.6		—		(4.0	)		52.6
Other:
U.S. stock/bond mutual funds		29.3		—		—			29.3
Interest rate swaps		63.6		—		—			63.6
Total	$	318.2	$	—	$	(153.6	)	$	164.6
LIABILITIES
Gas Utility:
NYMEX/ICE natural gas contracts	$	30.7	$	—	$	(30.7	)	$	—
Gas Marketing:
NYMEX/ICE natural gas contracts		82.3		—		(82.3	)		—
Natural gas commodity contracts		65.5		—		(4.0	)		61.5
Total	$	178.5	$	—	$	(117.0	)	$	61.5
As of March 31, 2022
ASSETS
Gas Utility:
U.S. stock/bond mutual funds	$	23.0	$	—	$	—		$	23.0
NYMEX/ICE natural gas contracts		58.9		—		(58.9	)		—
Gas Marketing:
NYMEX/ICE natural gas contracts		96.1		—		(88.4	)		7.7
Natural gas commodity contracts		30.8		—		(1.0	)		29.8
Other:
U.S. stock/bond mutual funds		24.1		—		—			24.1
Interest rate swaps		28.8		—		(7.9	)		20.9
Total	$	261.7	$	—	$	(156.2	)	$	105.5
LIABILITIES
Gas Marketing:
NYMEX/ICE natural gas contracts	$	40.4	$	—	$	(40.4	)	$	—
Natural gas commodity contracts		106.2		—		(1.0	)		105.2
Other:
Interest rate swaps		7.9		—		(7.9	)		—
Total	$	154.5	$	—	$	(49.3	)	$	105.2

	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, 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	)	$	—
As of September 30, 2022
ASSETS
U.S. stock/bond mutual funds	$	19.1	$	—	$	—		$	19.1
NYMEX/ICE natural gas contracts		57.8		—		(57.8	)		—
Total	$	76.9	$	—	$	(57.8	)	$	19.1
LIABILITIES
NYMEX/ICE natural gas contracts	$	30.7	$	—	$	(30.7	)	$	—
As of March 31, 2022
ASSETS
U.S. stock/bond mutual funds	$	23.0	$	—	$	—		$	23.0
NYMEX/ICE natural gas contracts		58.9		—		(58.9	)		—
Total	$	81.9	$	—	$	(58.9	)	$	23.0

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

6 Months Ended

Mar. 31, 2023

Notes Tables

Schedule of Net Benefit Costs [Table Text Block]

	Three Months Ended March 31,						Six Months Ended March 31,
	2023			2022			2023			2022
Spire
Service cost – benefits earned during the period	$	3.9		$	5.4		$	8.0		$	10.8
Interest cost on projected benefit obligation		5.9			5.3			12.3			10.4
Expected return on plan assets		(5.7	)		(8.2	)		(12.1	)		(16.4	)
Amortization of prior service credit		(1.2	)		(1.2	)		(2.3	)		(2.3	)
Amortization of actuarial loss		1.6			3.6			3.2			7.3
Loss on lump-sum settlements		—			11.7			8.6			11.7
Subtotal		4.5			16.6			17.7			21.5
Regulatory adjustment		10.4			(1.2	)		12.2			9.4
Net pension cost	$	14.9		$	15.4		$	29.9		$	30.9
Spire Missouri
Service cost – benefits earned during the period	$	2.9		$	3.8		$	5.7		$	7.7
Interest cost on projected benefit obligation		4.4			3.6			8.9			7.1
Expected return on plan assets		(4.5	)		(5.9	)		(9.0	)		(11.9	)
Amortization of prior service credit		(0.5	)		(0.5	)		(1.0	)		(1.0	)
Amortization of actuarial loss		1.6			2.8			3.1			5.6
Loss on lump-sum settlements		—			6.8			—			6.8
Subtotal		3.9			10.6			7.7			14.3
Regulatory adjustment		8.1			1.1			16.2			9.6
Net pension cost	$	12.0		$	11.7		$	23.9		$	23.9
Spire Alabama
Service cost – benefits earned during the period	$	0.8		$	1.3		$	1.9		$	2.7
Interest cost on projected benefit obligation		0.8			1.2			2.1			2.3
Expected return on plan assets		(0.5	)		(1.4	)		(1.6	)		(2.8	)
Amortization of prior service credit		(0.6	)		(0.6	)		(1.2	)		(1.2	)
Amortization of actuarial loss		0.2			0.8			0.3			1.7
Loss on lump-sum settlements		—			4.9			8.6			4.9
Subtotal		0.7			6.2			10.1			7.6
Regulatory adjustment		2.1			(2.5	)		(4.4	)		(0.6	)
Net pension cost	$	2.8		$	3.7		$	5.7		$	7.0

	Three Months Ended March 31,						Six Months Ended March 31,
	2023			2022			2023			2022
Spire
Service cost – benefits earned during the period	$	1.2		$	2.0		$	2.4		$	3.9
Interest cost on accumulated postretirement benefit obligation		2.2			1.5			4.3			3.0
Expected return on plan assets		(3.9	)		(4.3	)		(7.8	)		(8.5	)
Amortization of prior service cost		—			0.2			0.1			0.5
Amortization of actuarial gain		(1.1	)		(0.6	)		(2.1	)		(1.2	)
Subtotal		(1.6	)		(1.2	)		(3.1	)		(2.3	)
Regulatory adjustment		0.2			0.1			0.3			3.3
Net postretirement benefit (income) cost	$	(1.4	)	$	(1.1	)	$	(2.8	)	$	1.0
Spire Missouri
Service cost – benefits earned during the period	$	1.0		$	1.6		$	2.0		$	3.2
Interest cost on accumulated postretirement benefit obligation		1.7			1.1			3.3			2.2
Expected return on plan assets		(2.7	)		(2.9	)		(5.3	)		(5.7	)
Amortization of prior service cost		0.1			0.2			0.3			0.4
Amortization of actuarial gain		(0.8	)		(0.5	)		(1.6	)		(1.0	)
Subtotal		(0.7	)		(0.5	)		(1.3	)		(0.9	)
Regulatory adjustment		0.7			0.5			1.3			4.1
Net postretirement benefit cost	$	—		$	—		$	—		$	3.2
Spire Alabama
Service cost – benefits earned during the period	$	0.1		$	0.3		$	0.3		$	0.6
Interest cost on accumulated postretirement benefit obligation		0.5			0.3			0.9			0.7
Expected return on plan assets		(1.3	)		(1.3	)		(2.5	)		(2.6	)
Amortization of prior service (credit) cost		(0.1	)		—			(0.2	)		0.1
Amortization of actuarial gain		(0.2	)		—			(0.3	)		—
Subtotal		(1.0	)		(0.7	)		(1.8	)		(1.2	)
Regulatory adjustment		(0.4	)		(0.4	)		(0.9	)		(0.9	)
Net postretirement benefit income	$	(1.4	)	$	(1.1	)	$	(2.7	)	$	(2.1	)

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Note 10 - Information by Operating Segment (Tables)

6 Months Ended

Mar. 31, 2023

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, 2023
Operating Revenues:
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
Operating Expenses:
Natural gas		543.3		51.5		—		—			(8.3	)		586.5
Operation and maintenance		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
Total Operating Expenses		803.2		58.2		9.0		5.0			(12.3	)		863.1
Operating Income (Loss)	$	251.3	$	2.4	$	7.5	$	(0.9	)	$	—		$	260.3
Net Economic Earnings (Loss)	$	183.9	$	21.8	$	4.2	$	(10.7	)	$	—		$	199.2

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Three Months Ended March 31, 2022
Operating Revenues:
Revenues from external customers	$	817.4	$	59.4	$	4.0	$	0.1		$	—		$	880.9
Intersegment revenues		—		—		9.8		4.2			(14.0	)		—
Total Operating Revenues		817.4		59.4		13.8		4.3			(14.0	)		880.9
Operating Expenses:
Natural gas		356.0		45.8		—		—			(9.8	)		392.0
Operation and maintenance		104.2		3.2		5.8		4.2			(4.2	)		113.2
Depreciation and amortization		56.5		0.4		1.9		0.1			—			58.9
Taxes, other than income taxes		70.3		0.4		0.9		—			—			71.6
Total Operating Expenses		587.0		49.8		8.6		4.3			(14.0	)		635.7
Operating Income	$	230.4	$	9.6	$	5.2	$	—		$	—		$	245.2
Net Economic Earnings (Loss)	$	169.2	$	14.4	$	3.0	$	(5.6	)	$	—		$	181.0

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Six Months Ended March 31, 2022
Operating Revenues:
Revenues from external customers	$	1,320.9	$	107.3	$	7.8	$	0.3		$	—		$	1,436.3
Intersegment revenues		—		—		18.9		7.7			(26.6	)		—
Total Operating Revenues		1,320.9		107.3		26.7		8.0			(26.6	)		1,436.3
Operating Expenses:
Natural gas		566.2		93.8		—		—			(18.8	)		641.2
Operation and maintenance		211.5		5.9		11.6		8.4			(7.8	)		229.6
Depreciation and amortization		111.1		0.7		3.8		0.2			—			115.8
Taxes, other than income taxes		107.3		0.4		1.5		—			—			109.2
Total Operating Expenses		996.1		100.8		16.9		8.6			(26.6	)		1,095.8
Operating Income (Loss)	$	324.8	$	6.5	$	9.8	$	(0.6	)	$	—		$	340.5
Net Economic Earnings (Loss)	$	236.4	$	14.9	$	5.5	$	(13.2	)	$	—		$	243.6

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

	Gas Utility		Gas Marketing		Midstream		Other			Eliminations			Consolidated
Six Months Ended March 31, 2023
Operating Revenues:
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
Operating Expenses:
Natural gas		944.9		77.5		—		—			(16.7	)		1,005.7
Operation and maintenance		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
Total Operating Expenses		1,434.3		90.9		17.1		9.2			(24.6	)		1,526.9
Operating Income (Loss)	$	353.2	$	43.8	$	14.6	$	(1.1	)	$	—		$	410.5
Net Economic Earnings (Loss)	$	246.8	$	47.5	$	8.0	$	(18.0	)	$	—		$	284.3

	Three Months Ended March 31,						Six Months Ended March 31,
	2023			2022			2023			2022
Net Income	$	179.2		$	173.6		$	270.2		$	229.3
Adjustments, pre-tax:
Fair value and timing adjustments		26.6			9.9			18.8			13.6
Income tax adjustments		(6.6	)		(2.5	)		(4.7	)		0.7
Net Economic Earnings	$	199.2		$	181.0		$	284.3		$	243.6

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

	March 31,			September 30,			March 31,
	2023			2022			2022
Total Assets:
Gas Utility	$	8,317.6		$	8,042.8		$	7,684.1
Gas Marketing		335.0			638.7			431.1
Midstream		506.2			446.0			420.3
Other		1,959.1			2,449.2			2,123.5
Eliminations		(1,068.9	)		(1,493.0	)		(1,257.7	)
Total Assets	$	10,049.0		$	10,083.7		$	9,401.3

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Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Mar. 31, 2023	Mar. 31, 2023	Mar. 31, 2022	Sep. 30, 2022
Restricted Cash	$ 14.3	$ 14.3	$ 6.9	$ 14.0
Payments to Acquire Businesses, Gross	$ 37.1	$ 37.1	$ (0.0)

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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, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Regulated Operation [Member] | Spire Marketing [Member] | Spire Missouri [Member]
Purchases of natural gas from Spire Marketing	$ 13.8	$ 17.9	$ 42.3	$ 36.1
Regulated Operation [Member] | Spire Marketing [Member] | Spire Missouri [Member] | Related Party [Member]
Transportation services received from Spire STL Pipeline	0.1	0.0	0.1	0.0
Regulated Operation [Member] | Spire Marketing [Member] | Spire Alabama Inc [Member]
Purchases of natural gas from Spire Marketing	0.0	0.0	1.1	0.0
Unregulated Operation [Member] | Spire S T L Pipeline L L C [Member] | Spire Missouri [Member] | Related Party [Member]
Transportation services received from Spire STL Pipeline	$ 7.8	$ 7.8	$ 15.9	$ 15.9

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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, 2023	Mar. 31, 2022	Sep. 30, 2022
Accrued capital expenditures	$ 66.3	$ 38.8	$ 77.8
Spire Missouri [Member]
Accrued capital expenditures	35.4	28.7	45.6
Spire Alabama Inc [Member]
Accrued capital expenditures	$ 5.2	$ 5.0	$ 19.2

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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, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Allowance at beginning of period	$ 34.5	$ 31.4	$ 31.9	$ 30.3
Provision for expected credit losses	8.2	5.2	12.3	6.7
Write-offs, net of recoveries	(2.1)	(1.5)	(3.6)	(1.9)
Allowance at end of period	40.6	35.1	40.6	35.1
Spire Missouri [Member]
Allowance at beginning of period	28.2	23.8	24.9	22.6
Provision for expected credit losses	7.3	4.7	11.1	6.8
Write-offs, net of recoveries	(1.0)	(1.5)	(1.5)	(2.4)
Allowance at end of period	34.5	27.0	34.5	27.0
Spire Alabama Inc [Member]
Allowance at beginning of period	5.5	6.7	6.3	6.6
Provision for expected credit losses	0.5	0.5	0.7	0.0
Write-offs, net of recoveries	(0.7)	(0.1)	(1.7)	0.5
Allowance at end of period	$ 5.3	$ 7.1	$ 5.3	$ 7.1

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Note 2 - Revenue - Disaggregated of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Operating Revenues	$ 1,123.4	$ 880.9	$ 1,937.4	$ 1,436.3
Operating Segments [Member]
Operating Revenues			24.6
Consolidation, Eliminations [Member]
Operating Revenues	(12.3)	(14.0)		(26.6)
Gas Utility [Member] | Operating Segments [Member]
Operating Revenues	1,054.5	817.4	1,787.5	1,320.9
Gas Marketing [Member] | Operating Segments [Member]
Operating Revenues	60.6	59.4	134.7	107.3
Midstream [Member] | Operating Segments [Member]
Operating Revenues	16.5	13.8	31.7	26.7
Other Segments [Member]
Operating Revenues	4.1	4.3	8.1	8.0
Spire Missouri [Member]
Operating Revenues	791.0	571.2	1,332.2	919.1
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member]
Revenue	773.9	574.0	1,313.6	905.3
Changes in accrued revenue under alternative revenue programs	17.1	(2.8)	18.6	13.8
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member] | Residential [Member]
Revenue	570.0	529.1	970.6	776.2
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member] | Commercial and Industrial [Member]
Revenue	185.2	19.9	308.1	88.1
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member] | Transportation [Member]
Revenue	9.9	10.1	19.0	19.3
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member] | Off-system and Other Incentive [Member]
Revenue	4.5	11.3	9.6	15.8
Spire Missouri [Member] | Gas Utility [Member] | Operating Segments [Member] | Other Customer Revenue [Member]
Revenue	4.3	3.6	6.3	5.9
Spire Alabama Inc [Member]
Operating Revenues	218.3	204.1	370.7	330.7
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member]
Revenue	219.8	204.7	372.6	331.4
Changes in accrued revenue under alternative revenue programs	(1.5)	(0.6)	(1.9)	(0.7)
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member] | Residential [Member]
Revenue	135.1	129.9	231.4	210.0
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member] | Commercial and Industrial [Member]
Revenue	61.5	51.6	95.1	77.6
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member] | Transportation [Member]
Revenue	20.8	20.7	40.1	40.1
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member] | Off-system and Other Incentive [Member]
Revenue	1.7	0.6	4.1	1.0
Spire Alabama Inc [Member] | Gas Utility [Member] | Operating Segments [Member] | Other Customer Revenue [Member]
Revenue	0.7	1.9	1.9	2.7
Spire [Member]
Operating Revenues	1,123.4	880.9	1,937.4	1,436.3
Spire [Member] | Operating Segments [Member]
Operating Revenues	1,135.7	894.9	1,962.0	1,462.9
Spire [Member] | Consolidation, Eliminations [Member]
Operating Revenues	(12.3)	(14.0)	(24.6)	(26.6)
Spire [Member] | Gas Utility [Member] | Operating Segments [Member]
Revenue	1,034.2	824.9	1,765.7	1,310.3
Changes in accrued revenue under alternative revenue programs	20.3	(7.5)	21.8	10.6
Total Gas Utility operating revenues	1,054.5	817.4	1,787.5	1,320.9
Spire [Member] | Gas Utility [Member] | Operating Segments [Member] | Residential [Member]
Revenue	730.2	687.3	1,248.2	1,029.3
Spire [Member] | Gas Utility [Member] | Operating Segments [Member] | Commercial and Industrial [Member]
Revenue	260.3	85.6	430.9	189.4
Spire [Member] | Gas Utility [Member] | Operating Segments [Member] | Transportation [Member]
Revenue	33.3	33.5	64.2	64.7
Spire [Member] | Gas Utility [Member] | Operating Segments [Member] | Off-system and Other Incentive [Member]
Revenue	6.1	12.0	13.7	16.8
Spire [Member] | Gas Utility [Member] | Operating Segments [Member] | Other Customer Revenue [Member]
Revenue	4.3	6.5	8.7	10.1
Spire [Member] | Gas Marketing [Member] | Operating Segments [Member]
Unregulated Operating Revenue	60.6	59.4	134.7	107.3
Spire [Member] | Midstream [Member] | Operating Segments [Member]
Unregulated Operating Revenue	16.5	13.8	31.7	26.7
Spire [Member] | Other Segments [Member] | Operating Segments [Member]
Unregulated Operating Revenue	$ 4.1	$ 4.3	$ 8.1	$ 8.0

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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, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Gross Receipts Tax Amounts	$ 60.2	$ 51.9	$ 90.6	$ 73.8
Spire Missouri [Member]
Gross Receipts Tax Amounts	45.6	39.0	67.7	53.9
Spire Alabama Inc [Member]
Gross Receipts Tax Amounts	$ 12.6	$ 11.3	$ 19.4	$ 17.0

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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, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Net Income		$ 179.2	$ 173.6	$ 270.2	$ 229.3
Provision for preferred dividends		3.7	3.7	7.4	7.4
Income allocated to participating securities		0.4	0.2	0.5	0.3
Income Available to Common Shareholders		$ 175.1	$ 169.7	$ 262.3	$ 221.6
Basic (in shares)		52.5	51.8	52.5	51.7
Basic Earnings Per Common Share (in dollars per share)		$ 3.33	$ 3.27	$ 5.00	$ 4.28
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)		52.6	51.9	52.6	51.8
Diluted Earnings Per Common Share (in dollars per share)		$ 3.33	$ 3.27	$ 4.99	$ 4.28
* 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)		0.5	0.2	0.4	0.2

[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) - At The Market Program [Member] - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Apr. 28, 2022
Number of Shares Authorized for Issuance (in shares)		152,800,000	200,000,000.0
Forward Sales Agreements, Proceeds If Settled		$ 16
Subsequent Event [Member]
Forward Sales Agreements, Shares (in shares)	228,690

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Note 5 - Regulatory Matters (Details Textual) - USD ($)						1 Months Ended		3 Months Ended		6 Months Ended
	Apr. 23, 2023	Jan. 01, 2023	Nov. 18, 2022	Sep. 14, 2022	Dec. 23, 2021	Oct. 31, 2022	Feb. 28, 2021	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Apr. 28, 2023	Jan. 25, 2023	Sep. 30, 2022
Utilities Operating Expense, Gas and Petroleum Purchased								$ 586,500,000	$ 392,000,000.0	$ 1,005,700,000	$ 641,200,000
Missouri Public Service Commission [Member] | Infrastructure System Replacement Surcharge [Member]
Public Utilities, Requested Rate Increase (Decrease), Amount					$ 47,300,000
Spire Missouri [Member]
Utilities Operating Expense, Gas and Petroleum Purchased							$ 195,800,000	465,700,000	287,800,000	782,400,000	444,100,000
Public Utilities, Reduced Revenue Accounts Receivable Cost Of Gas and Regulatory Liabilities									150,000,000
Utilities Operating, Due From Other Parties									42,000,000		42,000,000
Spire Missouri [Member] | Missouri Public Service Commission [Member]
Public Utilities, Approved Rate Increase (Decrease), Amount			$ 78,000,000.0		72,200,000
Public Utilities, Requested Rate Increase (Decrease), Amount					$ 24,900,000
Public Utilities, Deferred Amount Under Order Authorizing Accounting Treatment														$ 42.8
Public Utilities, Disallowance From ACA Balance													$ 600,000
Spire Missouri [Member] | Missouri Public Service Commission [Member] | Subsequent Event [Member]
Public Utilities, Disallowance From ACA Balance Filed												$ 27,700,000
Spire Missouri [Member] | Missouri Public Service Commission [Member] | Maximum [Member] | Subsequent Event [Member]
Regulated Operating Revenue, Pipelines	$ 7.7
Spire Missouri [Member] | Missouri Public Service Commission [Member] | Infrastructure System Replacement Surcharge [Member]
Public Utilities, Approved Rate Increase (Decrease), Amount			$ 19,000,000.0
Spire Alabama Inc [Member]
Utilities Operating Expense, Gas and Petroleum Purchased								$ 61,800,000	$ 52,100,000	$ 131,200,000	$ 97,600,000
Spire Alabama Inc [Member] | Alabama Public Service Commission [Member]
Annual Revenue Increase From Rates, Amount		$ 15,000,000.0
Spire Gulf [Member]
Public Utilities, Approved Return on Equity, Percentage						9.95%
Public Utilities, Approved Rate, Increase Decrease Annualized Revenue						$ 2,500,000
Spire Mississippi [Member]
Public Utilities, Approved Rate Increase (Decrease), Amount				$ 1,300,000
Public Utilities, Approved Rate, Increase Decrease Annualized Revenue		$ 800,000
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		20 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		15 years

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Note 5 - Regulatory Matters - Regulatory Assets and Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022
Regulatory assets	$ 143.0	$ 355.4	$ 164.0
Regulatory Assets Noncurrent	1,316.7	1,112.4	1,106.8
Total Regulatory Assets	1,459.7	1,467.8	1,270.8
Regulatory Liability Current	5.3	3.7	3.2
Regulatory Liability Noncurrent	360.3	418.2	400.4
Total Regulatory Liabilities	365.6	421.9	403.6
Spire Missouri [Member]
Regulatory assets	62.7	288.1	112.7
Regulatory Assets Noncurrent	722.0	547.6	572.7
Total Regulatory Assets	784.7	835.7	685.4
Regulatory Liability Noncurrent	276.9	331.8	313.7
Total Regulatory Liabilities	276.9	331.8	313.7
Spire Alabama Inc [Member]
Regulatory assets	64.8	56.9	41.0
Regulatory Assets Noncurrent	568.3	538.2	506.7
Total Regulatory Assets	633.1	595.1	547.7
Regulatory Liability Noncurrent	21.5	23.0	24.7
Total Regulatory Liabilities	21.5	23.0	24.7
Unamortized Purchased Gas Adjustments Asset [Member]
Regulatory assets	115.3	322.2	146.6
Regulatory Assets Noncurrent	181.3	0.0	35.2
Regulatory Liability Current	0.0	53.0	17.1
Unamortized Purchased Gas Adjustments Asset [Member] | Spire Missouri [Member]
Regulatory assets	58.7	275.1	112.5
Regulatory Assets Noncurrent	181.3	0.0	35.2
Regulatory Liability Current	0.0	53.0	17.1
Unamortized Purchased Gas Adjustments Asset [Member] | Spire Alabama Inc [Member]
Regulatory assets	53.6	43.8	31.0
Other Regulatory Assets (Liabilities) [Member]
Regulatory assets	27.7	33.2	17.4
Regulatory Assets Noncurrent	147.2	129.2	109.4
Regulatory Liability Current	5.3	3.7	3.2
Regulatory Liability Noncurrent	28.9	14.4	13.5
Other Regulatory Assets (Liabilities) [Member] | Spire Missouri [Member]
Regulatory assets	4.0	13.0	0.2
Regulatory Assets Noncurrent	130.7	113.1	92.7
Regulatory Liability Current	22.9	7.3	7.9
Other Regulatory Assets (Liabilities) [Member] | Spire Alabama Inc [Member]
Regulatory assets	11.2	13.1	10.0
Regulatory Assets Noncurrent	1.0	1.0	1.1
Regulatory Liability Current	3.5	3.6	3.6
Pension and Other Postretirement Plans Costs [Member]
Regulatory assets	273.1	294.5	314.8
Regulatory Assets Noncurrent	161.0	172.6	179.4
Pension and Other Postretirement Plans Costs [Member] | Spire Missouri [Member]
Regulatory assets	195.5	222.9	227.5
Regulatory Assets Noncurrent	132.7	143.6	148.3
Pension and Other Postretirement Plans Costs [Member] | Spire Alabama Inc [Member]
Regulatory assets	73.1	66.5	82.0
Regulatory Assets Noncurrent	18.0	19.4	21.1
Deferred Income Tax Charge [Member]
Regulatory Assets Noncurrent	139.3	137.8	138.0
Deferred Income Tax Charge [Member] | Spire Missouri [Member]
Regulatory Assets Noncurrent	130.9	129.2	129.3
Deferred Income Tax Charge [Member] | Spire Alabama Inc [Member]
Regulatory Assets Noncurrent	2.0	2.2	2.2
Removal Costs [Member]
Regulatory Assets Noncurrent	516.4	493.7	456.3
Regulatory Liability Noncurrent	34.6	32.9	38.3
Removal Costs [Member] | Spire Missouri [Member]
Regulatory Assets Noncurrent	24.2	25.2	34.9
Regulatory Liability Noncurrent	0.0	0.0	5.7
Removal Costs [Member] | Spire Alabama Inc [Member]
Regulatory Assets Noncurrent	492.2	468.5	421.4
Renewable Energy Program [Member]
Regulatory Assets Noncurrent	59.4	57.2	53.1
Renewable Energy Program [Member] | Spire Missouri [Member]
Regulatory Assets Noncurrent	59.4	57.2	53.1
Estimated Deferred Taxes Due to Customers [Member]
Regulatory Liability Noncurrent	135.8	145.3	152.1
Estimated Deferred Taxes Due to Customers [Member] | Spire Missouri [Member]
Regulatory Liability Noncurrent	$ 121.3	$ 127.9	$ 134.7

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Note 5 - Regulatory Matters - Regulatory Assets Not Earning a Return (Details) - USD ($) $ in Millions	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022
Regulatory assets not earning a return	$ 607.4	$ 686.3	$ 555.6
Spire Missouri [Member]
Regulatory assets not earning a return	601.1	679.9	549.2
Pension and Other Postretirement Plans Costs [Member]
Regulatory assets not earning a return	127.8	152.9	152.0
Pension and Other Postretirement Plans Costs [Member] | Spire Missouri [Member]
Regulatory assets not earning a return	127.8	152.9	152.0
Deferred Income Tax Charge [Member]
Regulatory assets not earning a return	137.2	135.6	135.7
Deferred Income Tax Charge [Member] | Spire Missouri [Member]
Regulatory assets not earning a return	130.9	129.2	129.3
Unamortized Purchased Gas Adjustments Asset [Member]
Regulatory assets not earning a return	240.0	275.1	147.7
Unamortized Purchased Gas Adjustments Asset [Member] | Spire Missouri [Member]
Regulatory assets not earning a return	240.0	275.1	147.7
Other Regulatory Assets (Liabilities) [Member]
Regulatory assets not earning a return	102.4	122.7	120.2
Other Regulatory Assets (Liabilities) [Member] | Spire Missouri [Member]
Regulatory assets not earning a return	$ 102.4	$ 122.7	$ 120.2

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Note 6 - Financing (Details Textual) - USD ($)		1 Months Ended	3 Months Ended
	Jan. 05, 2023	Mar. 31, 2021	Mar. 31, 2023	Mar. 07, 2023	Feb. 13, 2023	Dec. 31, 2022	Oct. 13, 2022	Jul. 22, 2022
Interest Rate Swap [Member]
Derivative, Notional Amount, Settled			$ 325,000,000.0
Derivative, Gain (Loss) on Derivative, Net			39,500,000
Commercial Paper [Member]
Short-term Borrowing, Maximum Aggregate Principal Amount								$ 1,300,000,000.0
Commercial Paper [Member] | Parent Company [Member]
Short Term Borrowings Used to Support Lending to Utilities			$ 224.2
Spire [Member] | Notes Due March 15 2033 [Member]
Debt Instrument, Interest Rate, Stated Percentage				5.80%
Long-Term Debt, Gross				$ 150,000,000.0
Spire Missouri [Member] | First Mortgage Bond Due 2033 [Member]
Debt Instrument, Interest Rate, Stated Percentage					4.80%
Long-Term Debt, Gross					$ 400,000,000.0
Spire Missouri [Member] | Unsecured Term Loan [Member]
Debt Instrument, Face Amount	$ 250,000,000.0	$ 250,000,000.0
Debt Instrument, Term (Day)		364 days
Debt Instrument, Interest Rate, Stated Percentage	0.10%
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%
Debt Instrument, Basis Spread on Variable Rate	0.80%	0.65%
Spire Gulf [Member] | Notes Due October 15, 2029 [Member]
Debt Instrument, Interest Rate, Stated Percentage							5.32%
Long-Term Debt, Gross							$ 90,000,000.0
Spire Gulf [Member] | Notes Due October 15, 2032 [Member]
Debt Instrument, Interest Rate, Stated Percentage							5.41%
Long-Term Debt, Gross							$ 85,000,000.0
Spire Gulf [Member] | First Mortgage Bonds Due October 15, 2037 [Member]
Debt Instrument, Interest Rate, Stated Percentage							5.61%
Long-Term Debt, Gross							$ 30,000,000.0
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity								1,300,000,000.0
Long-Term Line of Credit, Total						$ 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								450,000,000.0
Revolving Credit Facility [Member] | Spire Missouri [Member]
Line of Credit Facility, Maximum Borrowing Capacity								575,000,000.0
Revolving Credit Facility [Member] | Spire Alabama Inc [Member]
Line of Credit Facility, Maximum Borrowing Capacity								$ 275,000,000.0

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Note 6 - Financing - Short-term Borrowings (Details) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022
Highest borrowings outstanding	$ 1,482.0
Lowest borrowings outstanding	554.4
Weighted average borrowings	$ 1,033.7
Weighted average interest rate	4.70%
Borrowings outstanding	$ 561.0	$ 1,037.5	$ 607.1
Weighted average interest rate	5.40%	3.30%	0.90%
Spire Missouri [Member] | Term Loan [Member]
Highest borrowings outstanding	$ 250.0
Lowest borrowings outstanding	0.0
Weighted average borrowings	$ 111.0
Weighted average interest rate	5.40%
Borrowings outstanding	$ 200.0	$ 0.0	$ 0.0
Weighted average interest rate	5.60%	0.00%	0.00%
Spire Missouri [Member] | Spire Note [Member]
Highest borrowings outstanding	$ 656.9
Lowest borrowings outstanding	3.8
Weighted average borrowings	$ 383.6
Weighted average interest rate	4.50%
Borrowings outstanding	$ 60.7	$ 445.3	$ 277.2
Weighted average interest rate	5.30%	3.30%	0.90%
Spire Alabama Inc [Member] | Spire Note [Member]
Highest borrowings outstanding	$ 274.0
Lowest borrowings outstanding	76.7
Weighted average borrowings	$ 134.9
Weighted average interest rate	4.60%
Borrowings outstanding	$ 121.3	$ 260.9	$ 156.6
Weighted average interest rate	5.30%	3.30%	0.90%
Commercial Paper [Member] | Parent Company [Member]
Highest borrowings outstanding	$ 1,282.0
Lowest borrowings outstanding	354.4
Weighted average borrowings	$ 922.7
Weighted average interest rate	4.60%
Borrowings outstanding	$ 361.0	$ 1,037.5	$ 607.1
Weighted average interest rate	5.30%	3.30%	0.90%

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Note 6 - Financing - Capitalized Interest Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Interest Paid Capitalized	$ 1.9	$ 1.0	$ 3.5	$ 2.1
Spire Missouri [Member]
Interest Paid Capitalized	0.6	0.1	1.1	0.1
Spire Alabama Inc [Member]
Interest Paid Capitalized	$ 0.6	$ 0.8	$ 1.3	$ 1.6

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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, 2023	Sep. 30, 2022	Mar. 31, 2022
Reported Value Measurement [Member]
Cash and cash equivalents	$ 6.9	$ 6.5	$ 8.3
Notes payable	561.0	1,037.5	607.1
Long-term debt, including current portion	3,959.1	3,239.7	3,238.5
Reported Value Measurement [Member] | Spire Missouri [Member]
Notes payable	200.0
Long-term debt, including current portion	2,034.5	1,637.7	1,637.1
Notes payable – associated companies	60.7	445.3	277.2
Reported Value Measurement [Member] | Spire Alabama Inc [Member]
Cash and cash equivalents	1.0	2.4
Long-term debt, including current portion	745.7	571.5	571.4
Notes payable – associated companies	121.3	260.9	156.6
Estimate of Fair Value Measurement [Member]
Cash and cash equivalents	6.9	6.5	8.3
Notes payable	561.0	1,037.5	607.1
Long-term debt, including current portion	3,704.2	2,851.8	3,299.1
Estimate of Fair Value Measurement [Member] | Spire Missouri [Member]
Notes payable	200.0
Long-term debt, including current portion	1,930.2	1,473.9	1,691.9
Notes payable – associated companies	60.7	445.3	277.2
Estimate of Fair Value Measurement [Member] | Spire Alabama Inc [Member]
Cash and cash equivalents	1.0	2.4	0.2
Long-term debt, including current portion	696.6	485.0	588.0
Notes payable – associated companies	121.3	260.9	156.6
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 1 [Member]
Cash and cash equivalents	6.9	6.5	8.3
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]
Notes payable	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	1.0	2.4	0.2
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	561.0	1,037.5	607.1
Long-term debt, including current portion	3,704.2	2,851.8	3,299.1
Estimate of Fair Value Measurement [Member] | Fair Value, Inputs, Level 2 [Member] | Spire Missouri [Member]
Notes payable	200.0
Long-term debt, including current portion	1,930.2	1,473.9	1,691.9
Notes payable – associated companies	60.7	445.3	277.2
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	696.6	485.0	588.0
Notes payable – associated companies	$ 121.3	$ 260.9	$ 156.6

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Note 8 - Fair Value Measurements - Schedule of Derivative Assets and Liabilities, Including Receivables and Payables (Details) - USD ($) $ in Millions	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022
Gasoline And Heating Oil Contracts [Member] | Parent Company [Member] | Term Loan [Member]
Derivative Asset Fair Value Gross Asset	$ 0.0
Gasoline And Heating Oil Contracts [Member] | Commercial Paper [Member] | Parent Company [Member]
Derivative Asset Fair Value Gross Asset	0.5
Spire Missouri [Member] | Gasoline And Heating Oil Contracts [Member] | Term Loan [Member]
Effects of netting, asset	(0.5)
Spire Missouri [Member] | Gasoline And Heating Oil Contracts [Member] | Spire Note [Member]
Derivative Assets	0.0
Fair Value, Recurring [Member]
Effects of netting, asset	(33.3)	$ (153.6)	$ (156.2)
Derivative Assets	104.3	164.6	105.5
Effects of netting, liability	(112.6)	(117.0)	(49.3)
Derivative Liabilities	33.3	61.5	105.2
Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Asset Fair Value Gross Asset	137.6	318.2	261.7
Derivative Liability Fair Value Gross Liability	145.9	178.5	154.5
Fair Value, Recurring [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	0.0
Fair Value, Recurring [Member] | Spire Missouri [Member]
Effects of netting, asset	(0.1)	(57.8)	(58.9)
Derivative Assets	20.7	19.1	23.0
Effects of netting, liability	(63.2)
Derivative Liabilities	0.0
Fair Value, Recurring [Member] | Spire Missouri [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Asset Fair Value Gross Asset	20.8	76.9	81.9
Derivative Liability Fair Value Gross Liability	63.2
Fair Value, Recurring [Member] | Spire Missouri [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
U S Stock And Bond Mutual Funds [Member] | Fair Value, Recurring [Member] | Gas Utility [Member]
Effects of netting, asset	0.0	0.0	0.0
Derivative Assets	20.7	19.1	23.0
U S Stock And Bond Mutual Funds [Member] | Fair Value, Recurring [Member] | Other Segments [Member]
Effects of netting, asset	0.0	0.0	0.0
Derivative Assets	29.2	29.3	24.1
U S Stock And Bond Mutual Funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset	20.7	19.1	23.0
U S Stock And Bond Mutual Funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Segments [Member]
Derivative Asset Fair Value Gross Asset	29.2	29.3	24.1
U S Stock And Bond Mutual Funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset	0.0	0.0	0.0
U S Stock And Bond Mutual Funds [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Segments [Member]
Derivative Asset Fair Value Gross Asset	0.0	0.0	0.0
U S Stock And Bond Mutual Funds [Member] | Fair Value, Recurring [Member] | Spire Missouri [Member]
Effects of netting, asset	0.0	0.0	0.0
Derivative Assets	20.7	19.1	23.0
U S Stock And Bond Mutual Funds [Member] | Fair Value, Recurring [Member] | Spire Missouri [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Asset Fair Value Gross Asset	20.7	19.1	23.0
U S Stock And Bond Mutual Funds [Member] | Fair Value, Recurring [Member] | Spire Missouri [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Asset Fair Value Gross Asset	0.0	0.0	0.0
N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Recurring [Member] | Gas Utility [Member]
Effects of netting, asset	(0.1)	(57.8)	(58.9)
Derivative Assets	0.0	0.0	0.0
Effects of netting, liability	(62.7)	(30.7)	(40.4)
Derivative Liabilities	0.0	0.0	0.0
N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Recurring [Member] | Gas Marketing [Member]
Effects of netting, asset	(31.9)	(91.8)	(88.4)
Derivative Assets	0.0	0.0	7.7
Effects of netting, liability	(48.1)	(82.3)
Derivative Liabilities	0.0	0.0
N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset	0.1	57.8	58.9
Derivative Liability Fair Value Gross Liability	62.7	30.7	40.4
N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset	31.9	91.8	96.1
Derivative Liability Fair Value Gross Liability	48.1	82.3
N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Utility [Member]
Derivative Asset Fair Value Gross Asset	0.0	0.0	0.0
Derivative Liability Fair Value Gross Liability	0.0	0.0	0.0
N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset	0.0	0.0	0.0
Derivative Liability Fair Value Gross Liability	0.0	0.0
N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Recurring [Member] | Spire Missouri [Member]
Effects of netting, asset	(0.1)	(57.8)	(58.9)
Derivative Assets	0.0	0.0	0.0
Effects of netting, liability	(62.7)	(30.7)
Derivative Liabilities	0.0	0.0
N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Recurring [Member] | Spire Missouri [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Asset Fair Value Gross Asset	0.1	57.8	58.9
Derivative Liability Fair Value Gross Liability	62.7	30.7
N Y M E X I C E Natural Gas Contracts [Member] | Fair Value, Recurring [Member] | Spire Missouri [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
Natural Gas Commodity Contracts [Member] | Fair Value, Recurring [Member] | Gas Marketing [Member]
Effects of netting, asset	(1.3)	(4.0)	(1.0)
Derivative Assets	37.9	52.6	29.8
Effects of netting, liability	(1.3)	(4.0)	(1.0)
Derivative Liabilities	31.1	61.5	105.2
Natural Gas Commodity Contracts [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset	39.2	56.6	30.8
Derivative Liability Fair Value Gross Liability	32.4	65.5	106.2
Natural Gas Commodity Contracts [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Gas Marketing [Member]
Derivative Asset Fair Value Gross Asset	0.0	0.0	0.0
Derivative Liability Fair Value Gross Liability	0.0	0.0	0.0
Gasoline And Heating Oil Contracts [Member] | Fair Value, Recurring [Member] | Spire Missouri [Member]
Effects of netting, asset	(0.5)
Derivative Assets	0.0
Gasoline And Heating Oil Contracts [Member] | Fair Value, Recurring [Member] | Spire Missouri [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Asset Fair Value Gross Asset	0.5
Gasoline And Heating Oil Contracts [Member] | Fair Value, Recurring [Member] | Spire Missouri [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Asset Fair Value Gross Asset	0.0
Interest Rate Swap [Member] | Fair Value, Recurring [Member]
Effects of netting, asset			(7.9)
Derivative Assets			20.9
Interest Rate Swap [Member] | Fair Value, Recurring [Member] | Other Segments [Member]
Effects of netting, asset	0.0	0.0
Derivative Assets	16.5	63.6
Effects of netting, liability	0.0		(7.9)
Derivative Liabilities	2.2		0.0
Interest Rate Swap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member]
Derivative Asset Fair Value Gross Asset			28.8
Interest Rate Swap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 1 [Member] | Other Segments [Member]
Derivative Asset Fair Value Gross Asset	16.5	63.6
Derivative Liability Fair Value Gross Liability	2.2		7.9
Interest Rate Swap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member]
Derivative Asset Fair Value Gross Asset			0.0
Interest Rate Swap [Member] | Fair Value, Recurring [Member] | Fair Value, Inputs, Level 2 [Member] | Other Segments [Member]
Derivative Asset Fair Value Gross Asset	0.0	$ 0.0
Derivative Liability Fair Value Gross Liability	$ 0.0		$ 0.0

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Note 9 - Pension Plans and Other Postretirement Benefits (Details Textual) - USD ($)			3 Months Ended			6 Months Ended		9 Months Ended
	Dec. 23, 2021	Dec. 22, 2021	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022	Jun. 30, 2022	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement				$ 0	$ 0
Regulatory Asset, Total			$ 1,459,700,000		1,270,800,000	$ 1,459,700,000	$ 1,270,800,000		$ 1,467,800,000
Pension Plan [Member]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			(0)		(11,700,000)	(8,600,000)	(11,700,000)
Spire Alabama Inc [Member]
Regulatory Asset, Total			633,100,000		547,700,000	633,100,000	547,700,000		$ 595,100,000
Spire Alabama Inc [Member] | Pension Plan [Member]
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement				27,500,000			17,400,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			(0)	$ (8,600,000)	$ (4,900,000)	(8,600,000)	$ (4,900,000)
Defined Benefit Plan, Plan Assets, Contributions by Employer						13,000,000.0
Anticipated Contributions to Pension Plans Qualified Trusts						$ 21,300,000
Spire Alabama Inc [Member] | Pension Plan One [Member]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate					3.60%		3.60%			3.00%
Defined Benefit Plan, Benefit Obligation, Settlement Losses Amortized Over Remaining Actuarial Life (Year)				13 years 4 months 24 days		12 years 3 months 18 days
Spire Alabama Inc [Member] | Pension Plan Two [Member]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate					3.10%		3.10%		5.65%	3.00%
Defined Benefit Plan, Benefit Obligation, Settlement Losses Amortized Over Remaining Actuarial Life (Year)				12 years 4 months 24 days		12 years 7 months 6 days
Spire Alabama Inc [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer								$ 0
Anticipated Contributions to Pension Plans Qualified Trusts								$ 0
Spire Missouri [Member]
Regulatory Asset, Total			784,700,000		$ 685,400,000	$ 784,700,000	$ 685,400,000		$ 835,700,000
Spire Missouri [Member] | Pension Costs [Member] | Missouri West [Member]
Regulatory Asset, Total	$ 4,400,000	$ 5,500,000
Spire Missouri [Member] | Pension Costs [Member] | Missouri East [Member]
Regulatory Asset, Total	32,400,000	29,000,000.0
Spire Missouri [Member] | Pension and Other Postretirement Plans Costs [Member] | Missouri West [Member]
Regulatory Assets for Which No Return on Investment During Recovery Period Is Provided	$ 1,100,000	$ 3,300,000
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 and Other Postretirement Plans Costs [Member] | Missouri East [Member]
Regulatory Assets for Which No Return on Investment During Recovery Period Is Provided	$ 11,000,000.0	$ 21,600,000
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]
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement							21,600,000
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement			$ (0)		$ (6,800,000)	(0)	$ (6,800,000)
Anticipated Contributions to Pension Plans Qualified Trusts				$ 800,000
Spire Missouri [Member] | Pension Plan [Member] | Qualified Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer						$ 23.2
Spire Missouri [Member] | Pension Plan [Member] | Nonqualified Plan [Member]
Defined Benefit Plan, Plan Assets, Contributions by Employer				$ 0
Spire Missouri [Member] | Pension Plan One [Member]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate				5.60%	3.60%		3.60%		5.70%	3.00%
Spire Missouri [Member] | Other Postretirement Benefits Plan [Member]
Postretirement Benefit Plans, Recovery in Rates Base Allowance	$ 8,600,000

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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, 2023	Dec. 31, 2022	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Pension Plan [Member]
Service cost – benefits earned during the period	$ 3.9		$ 5.4	$ 8.0	$ 10.8
Interest cost on projected benefit obligation	5.9		5.3	12.3	10.4
Expected return on plan assets	(5.7)		(8.2)	(12.1)	(16.4)
Amortization of prior service credit	(1.2)		(1.2)	(2.3)	(2.3)
Amortization of actuarial loss	1.6		3.6	3.2	7.3
Loss on lump-sum settlements	0.0		11.7	8.6	11.7
Subtotal	4.5		16.6	17.7	21.5
Regulatory adjustment	10.4		(1.2)	12.2	9.4
Net pension cost	14.9		15.4	29.9	30.9
Pension Plan [Member] | Spire Missouri [Member]
Service cost – benefits earned during the period	2.9		3.8	5.7	7.7
Interest cost on projected benefit obligation	4.4		3.6	8.9	7.1
Expected return on plan assets	(4.5)		(5.9)	(9.0)	(11.9)
Amortization of prior service credit	(0.5)		(0.5)	(1.0)	(1.0)
Amortization of actuarial loss	1.6		2.8	3.1	5.6
Loss on lump-sum settlements	0.0		6.8	0.0	6.8
Subtotal	3.9		10.6	7.7	14.3
Regulatory adjustment	8.1		1.1	16.2	9.6
Net pension cost	12.0		11.7	23.9	23.9
Pension Plan [Member] | Spire Alabama Inc [Member]
Service cost – benefits earned during the period	0.8		1.3	1.9	2.7
Interest cost on projected benefit obligation	0.8		1.2	2.1	2.3
Expected return on plan assets	(0.5)		(1.4)	(1.6)	(2.8)
Amortization of prior service credit	(0.6)		(0.6)	(1.2)	(1.2)
Amortization of actuarial loss	0.2		0.8	0.3	1.7
Loss on lump-sum settlements	0.0	$ 8.6	4.9	8.6	4.9
Subtotal	0.7		6.2	10.1	7.6
Regulatory adjustment	2.1		(2.5)	(4.4)	(0.6)
Net pension cost	2.8		3.7	5.7	7.0
Other Postretirement Benefits Plan [Member]
Service cost – benefits earned during the period	1.2		2.0	2.4	3.9
Interest cost on projected benefit obligation	2.2		1.5	4.3	3.0
Expected return on plan assets	(3.9)		(4.3)	(7.8)	(8.5)
Amortization of prior service credit	0.0		0.2	0.1	0.5
Amortization of actuarial loss	(1.1)		(0.6)	(2.1)	(1.2)
Subtotal	(1.6)		(1.2)	(3.1)	(2.3)
Regulatory adjustment	0.2		0.1	0.3	3.3
Net pension cost	(1.4)		(1.1)	(2.8)	1.0
Other Postretirement Benefits Plan [Member] | Spire Missouri [Member]
Service cost – benefits earned during the period	1.0		1.6	2.0	3.2
Interest cost on projected benefit obligation	1.7		1.1	3.3	2.2
Expected return on plan assets	(2.7)		(2.9)	(5.3)	(5.7)
Amortization of prior service credit	0.1		0.2	0.3	0.4
Amortization of actuarial loss	(0.8)		(0.5)	(1.6)	(1.0)
Subtotal	(0.7)		(0.5)	(1.3)	(0.9)
Regulatory adjustment	0.7		0.5	1.3	4.1
Net pension cost	0.0		0.0	0.0	3.2
Other Postretirement Benefits Plan [Member] | Spire Alabama Inc [Member]
Service cost – benefits earned during the period	0.1		0.3	0.3	0.6
Interest cost on projected benefit obligation	0.5		0.3	0.9	0.7
Expected return on plan assets	(1.3)		(1.3)	(2.5)	(2.6)
Amortization of prior service credit	(0.1)		0.0	(0.2)	0.1
Amortization of actuarial loss	(0.2)		0.0	(0.3)	0.0
Subtotal	(1.0)		(0.7)	(1.8)	(1.2)
Regulatory adjustment	(0.4)		(0.4)	(0.9)	(0.9)
Net pension cost	$ (1.4)		$ (1.1)	$ (2.7)	$ (2.1)

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Note 10 - Information by Operating Segment (Details Textual)	3 Months Ended
	Mar. 31, 2023
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, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Revenues from external customers	$ 1,123.4	$ 880.9	$ 1,937.4	$ 1,436.3
Intersegment revenues	0.0	0.0	0.0	0.0
Operating Revenues	1,123.4	880.9	1,937.4	1,436.3
Natural gas	586.5	392.0	1,005.7	641.2
Operation and maintenance	132.1	113.2	264.2	229.6
Depreciation and amortization	62.6	58.9	124.7	115.8
Taxes, other than income taxes	81.9	71.6	132.3	109.2
Total Operating Expenses	863.1	635.7	1,526.9	1,095.8
Operating Income (Loss)	260.3	245.2	410.5	340.5
Net Economic Earnings (Loss)	199.2	181.0	284.3	243.6
Other Segments [Member]
Revenues from external customers	0.2	0.1	0.3	0.3
Intersegment revenues	3.9	4.2	7.8	7.7
Operating Revenues	4.1	4.3	8.1	8.0
Natural gas	0.0	0.0	0.0	0.0
Operation and maintenance	4.9	4.2	8.9	8.4
Depreciation and amortization	0.0	0.1	0.2	0.2
Taxes, other than income taxes	0.1	0.0	0.1	0.0
Total Operating Expenses	5.0	4.3	9.2	8.6
Operating Income (Loss)	(0.9)	0.0	(1.1)	(0.6)
Net Economic Earnings (Loss)	(10.7)	(5.6)	(18.0)	(13.2)
Operating Segments [Member]
Revenues from external customers			0.0
Intersegment revenues			24.6
Operating Revenues			24.6
Natural gas			16.7
Operation and maintenance			7.9
Depreciation and amortization			0.0
Taxes, other than income taxes			0.0
Total Operating Expenses			24.6
Operating Income (Loss)			0.0
Net Economic Earnings (Loss)			0.0
Operating Segments [Member] | Gas Utility [Member]
Revenues from external customers	1,054.4	817.4	1,787.4	1,320.9
Intersegment revenues	0.1	0.0	0.1	0.0
Operating Revenues	1,054.5	817.4	1,787.5	1,320.9
Natural gas	543.3	356.0	944.9	566.2
Operation and maintenance	119.3	104.2	239.2	211.5
Depreciation and amortization	60.2	56.5	119.9	111.1
Taxes, other than income taxes	80.4	70.3	130.3	107.3
Total Operating Expenses	803.2	587.0	1,434.3	996.1
Operating Income (Loss)	251.3	230.4	353.2	324.8
Net Economic Earnings (Loss)	183.9	169.2	246.8	236.4
Operating Segments [Member] | Gas Marketing [Member]
Revenues from external customers	60.6	59.4	134.7	107.3
Intersegment revenues	0.0	0.0	0.0	0.0
Operating Revenues	60.6	59.4	134.7	107.3
Natural gas	51.5	45.8	77.5	93.8
Operation and maintenance	5.7	3.2	12.0	5.9
Depreciation and amortization	0.4	0.4	0.7	0.7
Taxes, other than income taxes	0.6	0.4	0.7	0.4
Total Operating Expenses	58.2	49.8	90.9	100.8
Operating Income (Loss)	2.4	9.6	43.8	6.5
Net Economic Earnings (Loss)	21.8	14.4	47.5	14.9
Operating Segments [Member] | Midstream [Member]
Revenues from external customers	8.2	4.0	15.0	7.8
Intersegment revenues	8.3	9.8	16.7	18.9
Operating Revenues	16.5	13.8	31.7	26.7
Natural gas	0.0	0.0	0.0	0.0
Operation and maintenance	6.2	5.8	12.0	11.6
Depreciation and amortization	2.0	1.9	3.9	3.8
Taxes, other than income taxes	0.8	0.9	1.2	1.5
Total Operating Expenses	9.0	8.6	17.1	16.9
Operating Income (Loss)	7.5	5.2	14.6	9.8
Net Economic Earnings (Loss)	4.2	3.0	$ 8.0	5.5
Consolidation, Eliminations [Member]
Revenues from external customers	0.0	0.0		0.0
Intersegment revenues	(12.3)	(14.0)		(26.6)
Operating Revenues	(12.3)	(14.0)		(26.6)
Natural gas	(8.3)	(9.8)		(18.8)
Operation and maintenance	(4.0)	(4.2)		(7.8)
Depreciation and amortization	0.0	0.0		0.0
Taxes, other than income taxes	0.0	0.0		0.0
Total Operating Expenses	(12.3)	(14.0)		(26.6)
Operating Income (Loss)	0.0	0.0		0.0
Net Economic Earnings (Loss)	$ 0.0	$ 0.0		$ 0.0

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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, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Revenues from external customers	$ 1,123.4	$ 880.9	$ 1,937.4	$ 1,436.3
Intersegment revenues	0.0	0.0	0.0	0.0
Intersegment revenues	0.0	0.0	0.0	0.0
Operating Revenues	1,123.4	880.9	1,937.4	1,436.3
Total Operating Revenues	(1,123.4)	(880.9)	(1,937.4)	(1,436.3)
Natural gas	586.5	392.0	1,005.7	641.2
Natural gas	(586.5)	(392.0)	(1,005.7)	(641.2)
Operation and maintenance	132.1	113.2	264.2	229.6
Operation and maintenance	(132.1)	(113.2)	(264.2)	(229.6)
Depreciation and amortization	62.6	58.9	124.7	115.8
Taxes, other than income taxes	81.9	71.6	132.3	109.2
Total Operating Expenses	863.1	635.7	1,526.9	1,095.8
Total Operating Expenses	(863.1)	(635.7)	(1,526.9)	(1,095.8)
Operating Income (Loss)	260.3	245.2	410.5	340.5
Net Economic Earnings (Loss)	199.2	181.0	284.3	243.6
Net Income	179.2	173.6	270.2	229.3
Fair value and timing adjustments	26.6	9.9	18.8	13.6
Income tax adjustments	(6.6)	(2.5)	(4.7)	0.7
Net Economic Earnings	199.2	181.0	284.3	243.6
Other Segments [Member]
Revenues from external customers	0.2	0.1	0.3	0.3
Intersegment revenues	3.9	4.2	7.8	7.7
Intersegment revenues	(3.9)	(4.2)	(7.8)	(7.7)
Operating Revenues	4.1	4.3	8.1	8.0
Total Operating Revenues	(4.1)	(4.3)	(8.1)	(8.0)
Natural gas	0.0	0.0	0.0	0.0
Natural gas	0.0	0.0	0.0	0.0
Operation and maintenance	4.9	4.2	8.9	8.4
Operation and maintenance	(4.9)	(4.2)	(8.9)	(8.4)
Depreciation and amortization	0.0	0.1	0.2	0.2
Taxes, other than income taxes	0.1	0.0	0.1	0.0
Total Operating Expenses	5.0	4.3	9.2	8.6
Total Operating Expenses	(5.0)	(4.3)	(9.2)	(8.6)
Operating Income (Loss)	(0.9)	0.0	(1.1)	(0.6)
Net Economic Earnings (Loss)	(10.7)	(5.6)	(18.0)	(13.2)
Net Economic Earnings	(10.7)	(5.6)	(18.0)	(13.2)
Operating Segments [Member]
Revenues from external customers			0.0
Intersegment revenues			24.6
Intersegment revenues			(24.6)
Operating Revenues			24.6
Total Operating Revenues			(24.6)
Natural gas			16.7
Natural gas			(16.7)
Operation and maintenance			7.9
Operation and maintenance			(7.9)
Depreciation and amortization			0.0
Taxes, other than income taxes			0.0
Total Operating Expenses			24.6
Total Operating Expenses			(24.6)
Operating Income (Loss)			0.0
Net Economic Earnings (Loss)			0.0
Net Economic Earnings			0.0
Operating Segments [Member] | Gas Utility [Member]
Revenues from external customers	1,054.4	817.4	1,787.4	1,320.9
Intersegment revenues	0.1	0.0	0.1	0.0
Intersegment revenues	(0.1)	0.0	(0.1)	0.0
Operating Revenues	1,054.5	817.4	1,787.5	1,320.9
Total Operating Revenues	(1,054.5)	(817.4)	(1,787.5)	(1,320.9)
Natural gas	543.3	356.0	944.9	566.2
Natural gas	(543.3)	(356.0)	(944.9)	(566.2)
Operation and maintenance	119.3	104.2	239.2	211.5
Operation and maintenance	(119.3)	(104.2)	(239.2)	(211.5)
Depreciation and amortization	60.2	56.5	119.9	111.1
Taxes, other than income taxes	80.4	70.3	130.3	107.3
Total Operating Expenses	803.2	587.0	1,434.3	996.1
Total Operating Expenses	(803.2)	(587.0)	(1,434.3)	(996.1)
Operating Income (Loss)	251.3	230.4	353.2	324.8
Net Economic Earnings (Loss)	183.9	169.2	246.8	236.4
Net Economic Earnings	183.9	169.2	246.8	236.4
Operating Segments [Member] | Gas Marketing [Member]
Revenues from external customers	60.6	59.4	134.7	107.3
Intersegment revenues	0.0	0.0	0.0	0.0
Intersegment revenues	0.0	0.0	0.0	0.0
Operating Revenues	60.6	59.4	134.7	107.3
Total Operating Revenues	(60.6)	(59.4)	(134.7)	(107.3)
Natural gas	51.5	45.8	77.5	93.8
Natural gas	(51.5)	(45.8)	(77.5)	(93.8)
Operation and maintenance	5.7	3.2	12.0	5.9
Operation and maintenance	(5.7)	(3.2)	(12.0)	(5.9)
Depreciation and amortization	0.4	0.4	0.7	0.7
Taxes, other than income taxes	0.6	0.4	0.7	0.4
Total Operating Expenses	58.2	49.8	90.9	100.8
Total Operating Expenses	(58.2)	(49.8)	(90.9)	(100.8)
Operating Income (Loss)	2.4	9.6	43.8	6.5
Net Economic Earnings (Loss)	21.8	14.4	47.5	14.9
Net Economic Earnings	21.8	14.4	47.5	14.9
Operating Segments [Member] | Midstream [Member]
Revenues from external customers	8.2	4.0	15.0	7.8
Intersegment revenues	8.3	9.8	16.7	18.9
Intersegment revenues	(8.3)	(9.8)	(16.7)	(18.9)
Operating Revenues	16.5	13.8	31.7	26.7
Total Operating Revenues	(16.5)	(13.8)	(31.7)	(26.7)
Natural gas	0.0	0.0	0.0	0.0
Natural gas	0.0	0.0	0.0	0.0
Operation and maintenance	6.2	5.8	12.0	11.6
Operation and maintenance	(6.2)	(5.8)	(12.0)	(11.6)
Depreciation and amortization	2.0	1.9	3.9	3.8
Taxes, other than income taxes	0.8	0.9	1.2	1.5
Total Operating Expenses	9.0	8.6	17.1	16.9
Total Operating Expenses	(9.0)	(8.6)	(17.1)	(16.9)
Operating Income (Loss)	7.5	5.2	14.6	9.8
Net Economic Earnings (Loss)	4.2	3.0	8.0	5.5
Net Economic Earnings	$ 4.2	$ 3.0	$ 8.0	$ 5.5

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Note 10 - Information by Operating Segment - Total Assets by Segment (Details) - USD ($) $ in Millions	Mar. 31, 2023	Sep. 30, 2022	Mar. 31, 2022
Total Assets	$ 10,049.0	$ 10,083.7	$ 9,401.3
Operating Segments [Member] | Gas Utility [Member]
Total Assets	8,317.6	8,042.8	7,684.1
Operating Segments [Member] | Gas Marketing [Member]
Total Assets	335.0	638.7	431.1
Operating Segments [Member] | Midstream [Member]
Total Assets	506.2	446.0	420.3
Operating Segments [Member] | Other Segments [Member]
Total Assets	1,959.1	2,449.2	2,123.5
Consolidation, Eliminations [Member]
Total Assets	$ (1,068.9)	$ (1,493.0)	$ (1,257.7)

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Note 11 - Commitments and Contingencies (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Long-Term Purchase Commitment, Amount	$ 1,551.7
Capital Committed to Contribute to Partnership		$ 10.0
Remaining Unfunded Capital Commitment	7.7
Spire Missouri [Member]
Long-Term Purchase Commitment, Amount	1,133.0
Spire Alabama Inc [Member]
Long-Term Purchase Commitment, Amount	$ 233.4