Welcome to our dedicated page for Alliant Energy SEC filings (Ticker: LNT), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
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 Corporation director Patrick E. Allen reported an award of deferred equity on January 9, 2026. He acquired 576.746 Deferred Common Stock Units at $65.02 per unit, bringing his total holdings of these derivative units to 44,665.768, held directly.
The deferred units are designed to be settled in shares of Alliant Energy common stock when Allen’s service as a director ends. The reported balance also reflects adjustments for accrued dividends through a dividend reinvestment mechanism that is exempt from Section 16 under Rule 16a-11.
Alliant Energy Corp director Ignacio A. Cortina reported an automatic award of 749.769 deferred common stock units on January 9, 2026, coded as an acquisition. The units are priced at $65.02 per unit and increase his directly held derivative position to 9,489.019 deferred common stock units. According to the disclosure, these units will be settled in shares of Alliant Energy common stock when Cortina’s service as a director ends, and the reported balance includes adjustments for accrued dividends through a dividend reinvestment feature that is exempt from Section 16 under Rule 16a-11.
Alliant Energy Corp director Stephanie Cox reported receiving deferred common stock units as part of her director compensation. On January 9, 2026, she acquired 615.196 deferred common stock units at a reference price of $65.02 per unit. After this award, she beneficially owns 16,581.485 deferred common stock units.
The units are designed to be settled in Alliant Energy common shares when she terminates her service as a director, and the reported balance includes adjustments for accrued dividends through a dividend reinvestment mechanism.
Alliant Energy Corp director Nancy Joy Falotico reported an acquisition of derivative equity tied to the company’s common stock. On 01/09/2026, she received 874.731 Deferred Common Stock Units at a reference price of $65.02 per unit, coded as an acquisition. After this transaction, she held a total of 18,711.408 Deferred Common Stock Units, all reported as directly owned.
The filing notes that these units are to be settled in shares of common stock when she terminates service as a director. It also explains that the total includes adjustments for accrued dividends through a dividend reinvestment transaction that is exempt from Section 16 under Rule 16a-11.
Alliant Energy Corporation director Michael Dennis Garcia reported a routine equity award. On January 9, 2026, he acquired 984.313 deferred common stock units of Alliant Energy at $65.02 per unit. After this transaction, he beneficially owned 24,700.844 deferred common stock units, held directly.
According to the disclosure, these deferred stock units will be settled in shares of Alliant Energy common stock when Garcia’s service as a director ends. The total includes adjustments for accrued dividends through a dividend reinvestment feature that is exempt from Section 16 under Rule 16a-11. No sales were reported in this filing.
Alliant Energy Corp director Roger K. Newport reported acquiring 865.118 deferred common stock units on January 9, 2026. The units were credited at a reference price of $65.02 per unit, increasing his holdings of deferred common stock units to 30,447.369, held directly. These deferred units are to be settled in shares of Alliant Energy common stock when he terminates his service as a director, and the reported balance includes adjustments for accrued dividends through a dividend reinvestment feature.
Alliant Energy Corporation director Raymond Christie reported an acquisition of deferred equity compensation. On January 9, 2026, he received 1,172.716 deferred common stock units at a reference price of $65.02 per unit, bringing his total holdings of these derivative units to 7,486.065.
These deferred units are designed to be settled in shares of Alliant Energy common stock when his service as a director ends, effectively aligning his compensation with long-term shareholder value. The reported balance also includes adjustments for accrued dividends through a dividend reinvestment mechanism that is exempt from Section 16 under Rule 16a-11.
Alliant Energy Corporation and its utility subsidiaries are expanding their boards and adding a new independent director. On January 5, 2026, the boards of Alliant Energy, Interstate Power and Light Company, and Wisconsin Power and Light Company increased their board size to 11 members and appointed Manu Asthana as a director effective February 23, 2026.
Asthana, 52, previously served as President and Chief Executive Officer of PJM Interconnection from 2020 to 2025, an organization that oversees the largest power grid in North America, serving 67 million people across 13 states and the District of Columbia. He will stand for election at Alliant Energy’s 2026 Annual Meeting of Shareowners as a nominee to serve until the 2029 Annual Meeting, alongside three directors whose terms expire in 2026.
Effective February 23, 2026, he will join the Audit Committee and Operations Committee of each board. For 2026 board service, he will receive non-employee director compensation in line with existing practices, with an annual retainer of $300,000 for service on all three boards.
Alliant Energy Corporation announced a leadership transition at its Wisconsin Power and Light Company (WPL) subsidiary. After 39 years with the organization, David A. de Leon, President of WPL and Senior Vice President of Alliant Energy and Interstate Power and Light Company (IPL), has informed the company that he intends to retire from all his positions. Effective January 5, 2026, he will step down as President of WPL but continue as Senior Vice President of Alliant Energy, IPL and WPL until his retirement on or about July 1, 2026.
Effective January 5, 2026, the Board of Directors of WPL appointed Rebecca Cameron Valcq as President of WPL. She will also serve as Vice President of Alliant Energy and IPL. Valcq, 50, has been Assistant Vice President of the company since 2024 and previously chaired the Public Service Commission of Wisconsin from 2019 to 2024, overseeing regulation of more than 1,000 utilities and leading the state’s Energy, Broadband and Energy Innovation offices.
Wisconsin Power and Light Company, a subsidiary of Alliant Energy Corporation, agreed to sell $300,000,000 of 5.700% Debentures due 2055 in a public offering. The debentures are being sold to a group of underwriters led by Mizuho Securities USA, Wells Fargo Securities, BofA Securities and MUFG Securities Americas under an underwriting agreement signed on December 2, 2025.
The debentures are issued under an existing indenture with U.S. Bank Trust Company and are registered on an automatic shelf registration statement on Form S-3, supported by a prospectus supplement filed on December 2, 2025. The offering is expected to close on December 5, 2025, subject to standard closing conditions. WPL also filed related exhibits, including the underwriting agreement, the officers’ certificate defining the debenture terms, a legal opinion from Perkins Coie LLP on the validity of the debentures, and a press release announcing that the offering was priced.