Alliant Energy Corporation (LNT)
Nasdaq: LNT · Electric & Other Services Combined · Madison, WI · filing with the SEC since 1994
Grade5.3
◀ Past 5.2● Present 5.7▶ Future 4.9
Filings
271 filings since 2017 beside 380 insider forms · Large accelerated filer · read from EDGAR on Nov 13, 2026Due nextLarge accelerated filer
10-K
Annual report for the fiscal year ending Dec 31, 2026Large accelerated filers have 60 days after the fiscal year ends.
by Mar 1, 2027
10-Q
Quarterly report for the quarter ending Mar 31, 2027Large accelerated filers have 40 days after the quarter ends; quarter ends are taken to the month end.
by May 10, 2027
A deadline is the latest date the SEC's rules allow for its filer category. It is not a forecast of the day the company files. Last time, the results release (8-K item 2.02) came 30 days after the quarter ended. The proxy statement was last filed Mar 31, 2026.
Filings a yearinsider forms included
6768686869656373
2026 counts to Nov 13, 2026.
Officer or director change (8-K item 5.02): 7 times in the last 36 months, the newest Jan 8, 2026.SEC letters: 4 in the last 36 months, the newest Dec 19, 2023.
Insider forms (3, 4, 5 and 144) are counted each year but not listed here; the people and their trades are on the Ownership tab.
FiledFormWhat it is, in plain wordsPeriodAsk
Oct 28, 2026
8-K items 1.01, 2.03, 9.01
Major agreement signed; New debt or obligation taken on · Current report
Oct 26, 2026
Mar 4, 2026
8-K items 1.01, 2.03, 9.01
Major agreement signed; New debt or obligation taken on · Current report
Mar 2, 2026
40 of 271 shown
Every row opens the filing on EDGAR. The plain words are the site's own for each form and each 8-K item; the complete history, insider forms included, is on EDGAR.