Spire Missouri issues $350M in bonds due 2036

Spire Missouri intends to use net proceeds for general corporate purposes, which may include repayment of other short-term indebtedness.

Rhea-AI Filing Summary

Spire Inc. reported that its wholly owned subsidiary, Spire Missouri Inc., issued $350 million in aggregate principal amount of First Mortgage Bonds, 6.200% Series due 2036, on October 8, 2026. The bonds were issued under an underwriting agreement dated October 5, 2026.

Spire Missouri intends to use the net proceeds for general corporate purposes, which may include repayment of other short-term indebtedness. The bonds are governed by Spire Missouri’s Mortgage and Deed of Trust, as amended and supplemented, including the Forty-Second Supplemental Indenture dated October 8, 2026.

Filing Explained

Spire Missouri has completed the bond issuance: the $350 million principal is due for repayment in 2036 at a stated 6.200% rate, creating a repayment obligation at the subsidiary rather than issuing Spire Inc. common shares.

8-K Event Classification

2 items: 8.01, 9.01

2 items

Item 8.01 Other Events Other

Voluntary disclosure of events the company deems important to shareholders but not covered by other items.

Item 9.01 Financial Statements and Exhibits Exhibits

Financial statements, pro forma financial information, or exhibit attachments filed with this report.

Key Figures

Aggregate principal amount: $350 million Interest rate: 6.200% Maturity: Due 2036 +1 more

4 metrics

Aggregate principal amount $350 million First Mortgage Bonds issued October 8, 2026

Interest rate 6.200% First Mortgage Bonds, Series due 2036

Maturity Due 2036 First Mortgage Bonds

Issue date October 8, 2026 First Mortgage Bonds

Key Terms

aggregate principal amount, net proceeds, Forty-Second Supplemental Indenture, First Mortgage Bonds

4 terms

aggregate principal amount financial

"issued $350 million in aggregate principal amount"

The aggregate principal amount is the total amount of money borrowed through a bond or loan that the borrower promises to repay. It’s like the original price tag on a loan or bond, showing how much money is involved in the deal. This number matters because it indicates the size of the debt and helps investors understand the scale of the borrowing.

net proceeds financial

"intends to use the net proceeds for general corporate purposes"

The amount of money a company actually keeps from a sale or fundraising after paying all direct costs and fees, similar to take-home pay after taxes and deductions. Investors care because net proceeds determine how much cash is available for things that affect value—paying debt, funding projects, buying assets, or returning money to shareholders—so it influences future growth potential and financial health.

Forty-Second Supplemental Indenture technical

"the Forty-Second Supplemental Indenture dated as of October 8, 2026"

First Mortgage Bonds financial

"First Mortgage Bonds, 6.200% Series due 2036"

First mortgage bonds are debt securities backed by a company’s property, granting bondholders the primary legal claim to that real estate if the issuer cannot pay. Think of them as being first in line for repayment, like a homeowner’s mortgage lender who gets paid before other creditors. For investors, this priority and the tangible collateral typically make these bonds less risky than unsecured debt, which can mean lower yields but greater protection in bankruptcy.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How much in bonds did Spire Missouri issue, and when are they due?

Spire Missouri issued $350 million in aggregate principal amount of First Mortgage Bonds, 6.200% Series due 2036, on October 8, 2026.

Who represented the underwriters in Spire Missouri’s bond offering?

BofA Securities, Inc., TD Securities (USA) LLC, Regions Securities LLC, and U.S. Bancorp Investments, Inc. acted as representatives for the several underwriters named in the underwriting agreement dated October 5, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 10/08/2026 - 04:34 PM EDT Accepted by SEC EDGAR 10/08/2026 - 04:34 PM EDT Learn about SEC filing dates

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): October 8, 2026

Commission File Number		Name of Registrant, Address of Principal Executive Offices and Telephone Number		State of Incorporation		IRS Employer Identification No.
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

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Exchange Act (only applicable to 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
6.375% Junior Subordinated Notes due 2086		SRJN		New York Stock Exchange LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the 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. ☐

Item 8.01 Other Events.

On October 8, 2026, Spire Missouri Inc. (“Spire Missouri”), a wholly owned subsidiary of Spire Inc., issued $350 million in aggregate principal amount of its First Mortgage Bonds, 6.200% Series due 2036 (the “Bonds”) pursuant to an Underwriting Agreement dated October 5, 2026, between Spire Missouri and the several underwriters named therein, for whom BofA Securities, Inc., TD Securities (USA) LLC, Regions Securities LLC, and U.S. Bancorp Investments, Inc. acted as representatives.

The Bonds were issued pursuant to Spire Missouri’s registration statement on Form S-3 (Registration Number 333-287024-01) filed with the Securities and Exchange Commission on May 7, 2025 (the “Registration Statement”), the base prospectus dated May 7, 2025, the preliminary prospectus supplement dated October 5, 2026 and the prospectus supplement dated October 7, 2026. The Bonds will be governed by the Mortgage and Deed of Trust, dated as of February 1, 1945, between Spire Missouri and Regions Bank, as successor trustee, as amended and supplemented by all supplemental indentures thereto, the latest of which is the Forty-Second Supplemental Indenture relating to the Bonds, dated as of October 8, 2026.

Spire Missouri intends to use the net proceeds for general corporate purposes, which may include repayment of other short-term indebtedness.

This Current Report on Form 8-K is being filed to report as exhibits certain documents in connection with the offering and sale of the Bonds for incorporation by reference into the Registration Statement.

Item 9.01 Financial Statements and Exhibits.

(b) Exhibits:

Exhibit No.	Description
1.1	Underwriting Agreement, dated October 5, 2026, between Spire Missouri and the several Underwriters named in Exhibit A thereto, for whom BofA Securities, Inc., TD Securities (USA) LLC, Regions Securities LLC, and U.S. Bancorp Investments, Inc. acted as representatives.
4.1	Forty-Second Supplemental Indenture, dated as of October 8, 2026, between Spire Missouri and Regions Bank, as trustee.
4.2	Form of First Mortgage Bond, 6.200% Series due 2036 (included in Exhibit 4.1).
5.1	Opinion of Stinson LLP.
23.1	Consent of Stinson LLP (included in Exhibit 5.1).
104	Cover Page Interactive Data File (formatted in Inline XBRL and included in the Interactive Data Files submitted under Exhibit 101).

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 hereunto duly authorized.

			Spire Inc.
Date:	October 8, 2026		By:	/s/ Adam W. Woodard
				Adam W. Woodard Executive Vice President and Chief Financial Officer

			Spire Missouri Inc.
Date:	October 8, 2026		By:	/s/ Melinda S. Rush
				Melinda S. Rush Chief Financial Officer

Filing Exhibits & Attachments

4 documents

Other Documents

• EX-1.1 EX-1.1 494.4 KB
• EX-4.1 EX-4.1 586.3 KB
• EX-5.1 EX-5.1 19.0 KB
• EX-101 XBRL TAXONOMY EXTENSION SCHEMA WITH EMBEDDED LINKBASES DOCUMENT 56.5 KB