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 Corp vice president Rebecca C. Valcq received a grant of 1,004 restricted stock units (RSUs) of common stock as a non-cash award. The RSUs convert to common shares on a one-to-one basis when they vest on December 31, 2028. Following this grant, her directly owned common stock amount reported in this filing is 2,773 shares.
Alliant Energy Corp Senior Vice President David A. de Leon reported equity awards and related tax withholding transactions in company stock. On February 19, 2026, he acquired 8,616 and 2,306 shares of common stock as grants, including restricted stock units that convert one-to-one into common shares and vest on December 31, 2028. On the same date, 5,207 shares were disposed of at $70.01 per share to cover tax liabilities. Following these transactions, he directly held 47,708.260 shares, plus 2,278.524 shares held indirectly through a 401(k) plan as of the filing date.
Alliant Energy Corp EVP and CFO Robert J. Durian reported equity compensation changes in common stock. On February 19, 2026, he acquired 27,882 shares and 5,950 shares through grant or award transactions at a stated price of $0.00 per share, including restricted stock units that convert one-for-one into common stock and vest on December 31, 2028.
On the same date, 16,630 shares were disposed of at $70.0100 per share to satisfy tax liabilities by delivering shares. After these transactions, he directly owned 157,125.879 common shares, and indirectly held 5,608.293 shares through a 401(k) plan, with adjustments that include accrued dividends via dividend reinvestment.
Alliant Energy vice president Mayuri Farlinger reported several equity award-related transactions in company common stock. On February 19, 2026, she acquired 3,026 shares and 1,098 shares through grant or award transactions at a stated price of $0.00 per share, increasing her direct holdings. She also disposed of 1,179 shares at $70.01 per share to cover tax obligations by delivering shares, a non-open-market, tax-withholding transaction. Following these transactions, she held 10,431.620 shares directly and 9,657.414 shares indirectly through a 401(k) plan, which reflects plan holdings as of the filing date. A portion of the awards represents restricted stock units that convert into common stock on a one-to-one basis and are scheduled to vest on December 31, 2028.
Alliant Energy executive vice president Antonio P. Smyth reported stock-based awards and related tax withholding in company common stock. He acquired 13,114 and 5,240 shares as grants at no cash price, both representing restricted stock units that convert one-to-one into shares when vested. A separate disposition of 6,226 shares at $70.01 per share was made to cover tax obligations. The RSUs vest on December 31, 2028, leaving him with 21,855 shares held directly after these transactions.
Alliant Energy Executive Vice President Raja Sundararajan reported equity compensation transactions in company common stock. He acquired 18,768 and 8,784 shares through grants at a price of $0.0000 per share, reflecting stock-based awards. A portion of these awards represents restricted stock units that convert to common stock on a one-to-one basis and vest on December 31, 2028. To cover tax obligations on the awards, 11,324 shares were disposed of at $70.0100 per share under a tax-withholding arrangement. After these transactions, he continues to hold common stock directly.
Alliant Energy Corp CAO and Controller Dylan Syse reported equity compensation activity in company common stock. On February 19, 2026, he acquired 1,063 and 750 restricted stock units (RSUs), which each convert to one common share when vested. The RSUs vest on December 31, 2028.
On the same date, 506 common shares were disposed of in a tax-withholding transaction at $70.01 per share, satisfying tax obligations related to the award. After these transactions, Syse directly held 4,020.054 shares of Alliant Energy common stock.
Alliant Energy Corporation, together with subsidiaries Interstate Power & Light (IPL) and Wisconsin Power & Light (WPL), reports on its regulated electric and natural gas utility operations in Iowa and Wisconsin. The companies serve about 1,010,000 electric and 435,000 natural gas customers, generating 2025 electric revenues of $3.7 billion and gas revenues of $525 million.
Electric supply comes from a mix of natural gas, coal, wind and solar generation plus purchased power, coordinated through the MISO regional market with defined seasonal reserve margins. The filing highlights extensive federal and state regulation over rates, resource planning and major projects, along with evolving environmental rules on air, water and coal ash.
Management emphasizes growth opportunities and risks tied to large load customers such as data centers, including the need for significant new generation and transmission, potential cost recovery challenges, and regulatory approvals. The report also describes human capital programs, unionized workforce levels, and safety, engagement and talent development initiatives supporting long-term operations.
Alliant Energy Corporation reported stronger 2025 results, with GAAP diluted earnings per share of $3.14, up from $2.69 in 2024. Ongoing (non-GAAP) EPS rose to $3.22 from $3.04, reflecting about 6% earnings growth driven mainly by higher revenue requirements from authorized rate base increases and continued capital investment.
The company affirmed its 2026 ongoing EPS guidance range of $3.36 to $3.46. Management outlined an updated 2026-2029 capital plan, projecting annual capital expenditures between $3,130 million and $3,625 million from 2026 through 2028, focused on renewables, energy storage, gas projects and electric and gas distribution systems.
Alliant Energy Corporation reported the initial shareholdings of a company officer. Vice President Rebecca C. Valcq filed a statement of beneficial ownership showing that she directly holds 1,762.21 shares of Alliant Energy common stock. This filing reflects her ownership position as of the event date of 01/05/2026 and indicates that these shares are held directly, with no indirect ownership reported. The filing also shows no derivative securities, such as options or warrants, listed for her at this time.