ALLIANT ENERGY CORP 8-K

What Happened

• Alliant Energy Corporation filed an 8-K (filed May 1, 2026) to announce its financial results for the three months ended March 31, 2026. The company issued a press release on April 30, 2026 announcing those quarterly results, which is furnished as Exhibit 99.1 to the filing.

Key Details

• Press release date: April 30, 2026; 8-K filing date: May 1, 2026.
• Results cover the quarter ended March 31, 2026 (Q1 2026).
• The press release is included as Exhibit 99.1; the filing also includes the Inline XBRL cover page (Exhibit 104).
• The report was signed on behalf of Alliant Energy and its regulated utilities by Dylan M. Syse, Chief Accounting Officer and Controller, on April 30, 2026.

Why It Matters

• This 8-K signals Alliant Energy has publicly released its latest quarterly earnings and related financial information. Investors should review Exhibit 99.1 (the April 30 press release) and the company’s full quarterly filings for specific revenue, earnings, and operational metrics to assess performance versus expectations. The 8-K itself does not include numeric results—those are in the furnished press release.