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Alliant Energy Corporation filings document regulated utility results, financing arrangements, governance matters, and capital-structure disclosures for Alliant Energy and its utility subsidiaries, Interstate Power and Light Company and Wisconsin Power and Light Company. Combined Form 8-K reports furnish quarterly and annual financial results and record material events for the parent company and the IPL and WPL registrants.
Recent filings also cover term loan credit agreements, covenant requirements, common stock distribution agreements, forward sale arrangements, and other financing matters. Proxy materials disclose annual meeting items, director elections, executive compensation, equity awards, shareholder voting matters, and board governance for the Nasdaq-listed common stock.
ALLIANT ENERGY CORP EVP and CFO Robert J. Durian reported a small sale of common stock. On 2026-08-10, he sold 0.0970 shares of Alliant Energy common stock at $68.60 per share, with the reported post-transaction direct holding at 158,145.9390 shares, including adjustments for accrued dividends through a dividend reinvestment transaction exempt under Rule 16a-11. In addition, he reported indirect ownership of 5,649.8780 shares held through a 401(k) plan as of the filing date.
Alliant Energy Corporation reported relatively stable results for the six months ended June 30, 2026. Consolidated revenues were $2.155 billion versus $2.088 billion a year earlier, and net income attributable to common shareowners was $394 million compared with $387 million. Diluted EPS was $1.52, slightly above $1.50 in 2025, supported in part by a larger income tax benefit driven by renewable tax credits and changes in state apportionment.
Capital spending remained heavy, with $1.022 billion in construction and acquisition expenditures in the first half, funded through operating cash flow of $481 million, increased commercial paper, and a $400 million term loan. Cash declined to $25 million from $556 million at year-end.
The company continued to build equity via at-the-market programs using forward sale agreements. As of June 30, 2026, Alliant could physically settle 6.9 million shares for $504 million under its 2026 program and 18.7 million shares for $1.233 billion under the 2025 program, creating additional future financing flexibility and potential dilution. Utility subsidiaries IPL and WPL remained the core earnings contributors, while extensive regulatory assets and liabilities, commodity hedging, receivables securitization, and sizeable purchase and environmental commitments continue to shape the risk profile.
Alliant Energy reported second quarter 2026 GAAP diluted EPS of $0.65, slightly below $0.68 a year earlier, on revenues of $971 million versus $961 million. Net income was $170 million compared with $174 million. Results were supported by higher revenue requirements from growing rate base at IPL and WPL, higher equity income and stronger temperature‑normalized electric and gas sales, partly offset by increased labor, maintenance, financing and depreciation costs and less favorable weather, which reduced operating income by $11 million.
For the first six months of 2026, GAAP diluted EPS was $1.52 versus $1.50, while ongoing (non‑GAAP) EPS was $1.47, excluding a $0.05 per‑share state tax apportionment benefit. Revenues for the period rose to $2.16 billion. The company reaffirmed 2026 ongoing EPS guidance of $3.36-$3.46 per share and indicated it is trending toward the upper half of that range. Management also highlighted expected 60% load growth by 2031 driven by large customers, alongside continued high capital spending and a shift toward more short‑term borrowings.
ALLEN PATRICK E reported acquisition or exercise transactions in this Form 4 filing.
Alliant Energy Corp director Patrick E. Allen received a grant of 490.838 Deferred Common Stock Units, referenced at $76.40 per unit. These units will be settled in shares of common stock when his board service ends and bring his deferred unit holdings to 46,349.141, including adjustments for accrued dividends through dividend reinvestment.
Cortina Ignacio A reported acquisition or exercise transactions in this Form 4 filing.
ALLIANT ENERGY CORP director Ignacio A. Cortina received a grant of 638.089 Deferred Common Stock Units, referenced at $76.40 per unit. Following this award, Cortina holds 10,942.579 Deferred Common Stock Units directly. These units are to be settled in shares of common stock upon his termination of service as a director and include adjustments for accrued dividends through a dividend reinvestment transaction exempt from Section 16 under Rule 16a-11.
Cox Stephanie reported acquisition or exercise transactions in this Form 4 filing.
Alliant Energy Corp director Stephanie Cox received a grant of 523.5610 Deferred Common Stock Units on July 10, 2026. Each unit corresponds to one share of common stock, and the units will be settled in shares upon her termination of service as a director, bringing her total deferred units to 17,907.2040. The award amount includes adjustments for accrued dividends through a dividend reinvestment transaction.
Falotico Nancy Joy reported acquisition or exercise transactions in this Form 4 filing.
ALLIANT ENERGY CORP director Nancy Joy Falotico received a grant of 744.4370 Deferred Common Stock Units on 2026-07-10 at a reference price of $76.4000 per unit. These units, including adjustments for accrued dividends, will be settled in common shares when her board service ends, bringing her Deferred Common Stock Unit holdings to 20522.8110 units.
Garcia Michael Dennis reported acquisition or exercise transactions in this Form 4 filing.
Alliant Energy Corp director Michael Dennis Garcia reported a grant of 837.696 Deferred Common Stock Units on July 10, 2026, at a reference value of $76.40 per unit. These units will be settled in common shares when his board service ends, bringing his deferred unit balance to 26,794.316, including dividend reinvestment adjustments.
Newport Roger K reported acquisition or exercise transactions in this Form 4 filing.
ALLIANT ENERGY CORP director Roger K. Newport reported a grant of 736.257 Deferred Common Stock Units on July 10, 2026. The units, valued at $76.40 per unit for reporting purposes, will be settled in common shares upon his termination of board service, and bring his total directly held deferred units to 32,419.510, including adjustments for accrued dividends through a dividend reinvestment mechanism.
Alliant Energy Corp director Raymond Christie received a grant of 998.0360 Deferred Common Stock Units on 2026-07-10, reported as a derivative grant/award acquisition. According to the terms, these units, which include dividend reinvestment adjustments, will be settled in shares of common stock when his service as a director ends, bringing his total deferred units to 9,648.3080.