A regulated utility holding company that delivers electricity and natural gas to roughly a million and a half homes and businesses across Iowa and Wisconsin through its two main units, Interstate Power and Light and Wisconsin Power and Light. The company was born in 1998 when three regional utilities merged, and it took the name "Alliant" the next year as a play on "alliance" — a nod to the three-way partnership that created it. Its roots stretch back to utilities incorporated in the 1920s, and it also holds a stake in a transmission-only company and a wind farm in Oklahoma.
IPL prices $500M of 5.100% senior debentures due 2031 in public offering
Interstate Power and Light Company (IPL), a subsidiary of Alliant Energy Corporation, priced a public offering of $500 million aggregate principal amount of 5.100% Senior Debentures due 2031.
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The debentures mature on September 30, 2031, and the offering is expected to close on August 21, 2026, subject to customary closing conditions.
IPL entered into an Underwriting Agreement on August 18, 2026, with Mizuho Securities USA LLC, PNC Capital Markets LLC, U.S. Bancorp Investments, Inc., and Wells Fargo Securities, LLC as representatives of the underwriters.
Net proceeds will be used to reduce outstanding capital under IPL's receivables purchase and sale program, reduce outstanding commercial paper, and/or for general corporate purposes.
The debentures are registered under an automatic shelf registration statement on Form S-3 (Registration No. 333-276062-01) filed with the SEC on December 15, 2023.
8.01 Other Events · 9.01 Financial Statements and Exhibits
Alliant Energy shareholders elect four directors and approve executive pay and auditor at 2026 annual meeting.
Alliant Energy held its annual shareowner meeting on May 20, 2026, and reported final voting results in an 8-K filed May 21, 2026.
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All four director nominees — Patrick Allen, Manu Asthana, Ignacio Cortina, and Michael Garcia — were elected to terms ending in 2029; each received over 177 million votes for, with broker non-votes of 23,966,787.
Shareowners approved, on a non-binding advisory basis, the compensation of named executive officers, with 196,043,476 votes for and 8,748,646 against.
The appointment of Deloitte & Touche LLP as independent registered public accounting firm for 2026 was ratified with 221,486,729 votes for and 7,841,355 against.
The report was filed under Item 5.07 to disclose the final vote results on these three matters.
5.07 Submission of Matters to a Vote of Security Holders
Alliant Energy enters $1B at-the-market common stock distribution agreement
Alliant Energy Corporation entered a distribution agreement on March 19, 2026, to sell up to $1,000,000,000 of its common stock through agents and forward purchasers.
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The agents include Barclays Capital Inc., BofA Securities, Inc., Goldman Sachs & Co. LLC, J.P. Morgan Securities LLC, KeyBanc Capital Markets Inc., Mizuho Securities USA LLC, MUFG Securities Americas Inc., TD Securities (USA) LLC, and Wells Fargo Securities, LLC.
Sales may be made through ordinary brokers' transactions on Nasdaq, in block trades, or as otherwise agreed; the company may also enter into forward confirmations with forward purchasers.
Net proceeds are intended for general corporate purposes, including debt repayment, working capital, construction, acquisitions, and investments.
The shares will be issued under an existing Form S-3 registration statement, and a prospectus supplement was filed on March 19, 2026.
1.01 Entry into a Material Definitive Agreement · 9.01 Financial Statements and Exhibits
Alliant Energy enters $400M term loan credit agreement maturing March 2027
Alliant Energy Corporation entered a $400 million term loan credit agreement on March 2, 2026, with U.S. Bank National Association as administrative agent.
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The credit agreement includes an incremental term loan facility of up to $100 million, with no lender obligated to provide incremental loans.
Borrowings may be used for general corporate purposes, including working capital, interim capital expenditure funding, and refinancing other debt.
The facility matures on March 1, 2027, and includes a debt-to-capital ratio covenant of not greater than 65% on a consolidated basis.
The agreement contains customary events of default, including a cross-default provision for debt defaults of $100 million or more.
1.01 Entry into a Material Definitive Agreement · 2.03 Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement · 9.01 Financial Statements and Exhibits
Alliant Energy reports 2025 GAAP EPS of $3.14, ongoing EPS of $3.22, and affirms 2026 guidance of $3.36-$3.46
Fourth quarter 2025 GAAP EPS was $0.55, down from $0.58 in Q4 2024; ongoing EPS was $0.60, down from $0.70 in Q4 2024.
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GAAP EPS for 2025 was $3.14, up from $2.69 in 2024; ongoing (non-GAAP) EPS was $3.22, up from $3.04 in 2024, representing 6% growth.
2025 results were driven by higher revenue requirements from authorized rate base increases, partially offset by higher O&M, depreciation, and financing expenses.
2025 ongoing EPS excludes a $0.05 asset valuation charge and a $0.03 deferred tax remeasurement charge; 2024 ongoing EPS excludes several charges including a $0.17 asset valuation charge for IPL's Lansing Generating Station.
Alliant Energy affirmed 2026 ongoing EPS guidance of $3.36-$3.46 and updated projected capital expenditures for 2026-2029, totaling $3,130M in 2026.
2.02 Results of Operations and Financial Condition · 9.01 Financial Statements and Exhibits
Alliant Energy appoints Manu Asthana to its boards effective February 23, 2026
On January 5, 2026, the boards of Alliant Energy, Interstate Power and Light, and Wisconsin Power and Light increased board size to 11 and appointed Manu Asthana as a director.
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Asthana, 52, served as President and CEO of PJM Interconnection from 2020 to 2025, which operates the largest power grid in North America.
He will stand for election at the 2026 Annual Meeting of Shareowners as a nominee to serve until the 2029 Annual Meeting.
Effective February 23, 2026, Asthana will join the Audit Committee and Operations Committee of each board.
As a non-employee director, he will receive the standard compensation, with a 2026 annual retainer of $300,000 for service on all boards.
5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements