01—Abstract
Summary
Summary of the 8-K filed September 26, 2025. Cited figures are marked; the original filing is the authoritative source.
Alliant Energy Corporation (NASDAQ: LNT) priced a public offering of $725 milliona aggregate principal amount of its 5.750% Fixed-to-Fixed Reset Rate Junior Subordinated Notes due 2056, entering into an Underwriting Agreement on September 23, 2025 with BofA Securities, Inc., MUFG Securities Americas Inc., Barclays Capital Inc., Goldman Sachs & Co. LLC, and J.P.
Morgan Securities LLC, as representatives of the underwriters. The notes are issued under an Indenture and First Supplemental Indenture, each dated September 26, 2025, with The Bank of New York Mellon Trust Company, N.A., as trustee, and are registered under an automatic shelf registration statement on Form S-3 filed December 15, 2023 and amended September 22, 2025. The notes are due April 1, 2056.
According to the accompanying press release, Alliant Energy intends to use the net proceeds to reduce outstanding commercial paper, retire long-term debt and/or for general corporate purposes. The closing is expected on September 26, 2025, subject to customary closing conditions.
Mizuho Securities USA LLC and Wells Fargo Securities, LLC are named as joint book-running managers in the press release. This Form 8-K was filed to file the underwriting agreement, indenture, supplemental indenture, legal and tax opinions from Perkins Coie LLP, and the pricing press release as exhibits to the registration statement.
02—Key points
Key Highlights
- Offering size: $725 million aggregate principal amount of 5.750% Fixed-to-Fixed Reset Rate Junior Subordinated Notes due 2056.
- Maturity: The notes are due April 1, 2056.
- Underwriting: Underwriting Agreement dated September 23, 2025 with BofA Securities, MUFG Securities Americas, Barclays Capital, Goldman Sachs & Co. LLC, and J.P. Morgan Securities LLC as representatives.
- Use of proceeds: Reduce outstanding commercial paper, retire long-term debt and/or general corporate purposes.
- Documentation: Indenture and First Supplemental Indenture, both dated September 26, 2025, with The Bank of New York Mellon Trust Company, N.A., as trustee.
- Registration: Issued under automatic shelf registration statement on Form S-3 (Registration No. 333-276062).
- Closing: Expected on September 26, 2025, subject to customary closing conditions.
03—Questions
Frequently Asked Questions
What securities did Alliant Energy sell?
Alliant Energy agreed to sell $725 million aggregate principal amount of its 5.750% Fixed-to-Fixed Reset Rate Junior Subordinated Notes due 2056 in a public offering.
When do the notes mature and when is the offering expected to close?
The notes are due April 1, 2056. The closing is expected to occur on September 26, 2025, subject to customary closing conditions.
How will Alliant Energy use the proceeds?
According to the press release, the net proceeds are intended to reduce outstanding commercial paper, retire long-term debt and/or be used for general corporate purposes.
Under what registration were the notes issued?
The notes are registered under an automatic shelf registration statement on Form S-3 (Registration No. 333-276062), filed December 15, 2023 and amended September 22, 2025, and supplemented by a prospectus supplement filed September 25, 2025.
Who is the trustee and what legal opinions were provided?
The Bank of New York Mellon Trust Company, N.A. is the trustee. Perkins Coie LLP issued a legality opinion (Exhibit 5.1) and a tax opinion regarding the 'Material U.S. Federal Income Tax Considerations' section of the prospectus supplement (Exhibit 8.1), both dated September 26, 2025.
04—Continue