ALLIANT ENERGY CORP

LNT - Company ID 0000352541

Market cap$19.71 B

Rank#629

Filings3,106

ALLIANT ENERGY CORP has filed 3,106 public company documents between 1994 and 2026. The most frequent type is insider trade (2,041 filings), alongside the regular cadence of annual reports, quarterly reports, and event disclosures every public company must make. Use the filters to focus on one filing type, or flip the sort to trace the company's history from its earliest paperwork.

Continue researchLNT overview$19.71 BMarket cap, financials, charts, and latest company context.

Continue researchMarket cap historyRank #629See the market value trend behind the filing history.

Continue researchRevenue trendAnnual historyMove from documents into filing-backed operating results.

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Data parsed from SEC EDGAR XBRL filings. See the full market cap rankings.

Type	Filing	Filed	Period covered	Open
DEFA14A	Proxy materials	26y ago2000-03-27	-	View filing
DEF 14A	Proxy statement	26y ago2000-03-27	2000-05-17	View filing
S-4/A	S-4/A	26y ago2000-03-24	-	View filing
POS AMC	POS AMC	26y ago2000-03-13	-	View filing
U-1/A	U-1/A	26y ago2000-03-01	-	View filing
RW	RW	26y ago2000-02-29	-	View filing
POS AMC	POS AMC	26y ago2000-02-28	-	View filing
U-1/A	U-1/A	26y ago2000-02-18	-	View filing
8-K	Major company event	26y ago2000-02-16	2000-02-01	View filing
35-CERT	35-CERT	26y ago2000-02-15	-	View filing
S-4/A	S-4/A	26y ago2000-02-11	-	View filing
35-CERT	35-CERT	26y ago2000-02-08	-	View filing
424B3	424B3	26y ago2000-02-04	-	View filing
8-K	Major company event	26y ago2000-02-02	2000-02-01	View filing
8-K	Major company event	26y ago2000-02-02	2000-02-01	View filing
U-1	U-1	26y ago2000-01-28	-	View filing
8-K	Major company event	26y ago2000-01-26	2000-01-26	View filing
8-K/A	Major company event (amended)	26y ago2000-01-25	2000-01-25	View filing
8-K	Major company event	26y ago2000-01-25	2000-01-25	View filing
POS AMC	POS AMC	26y ago2000-01-10	-	View filing
U-1	U-1	26y ago1999-12-28	-	View filing
S-4	S-4	26y ago1999-12-16	-	View filing
U-57	U-57	26y ago1999-12-15	-	View filing
S-8	Employee stock plan	26y ago1999-12-15	-	View filing
U-9C-3	U-9C-3	26y ago1999-11-29	1999-09-30	View filing
POS AMC	POS AMC	26y ago1999-11-24	-	View filing
35-CERT	35-CERT	26y ago1999-11-15	-	View filing
10-Q	Quarterly report	26y ago1999-11-12	1999-09-30	View filing
POS AMC	POS AMC	26y ago1999-11-05	-	View filing
10-Q/A	Quarterly report (amended)	26y ago1999-11-01	1999-06-30	View filing
10-Q/A	Quarterly report (amended)	26y ago1999-11-01	1999-03-31	View filing
10-K/A	Annual report (amended)	26y ago1999-11-01	1998-12-31	View filing
U-57	U-57	26y ago1999-10-13	-	View filing
U-1/A	U-1/A	26y ago1999-10-13	-	View filing
U-1/A	U-1/A	26y ago1999-09-27	-	View filing
35-CERT	35-CERT	26y ago1999-08-31	-	View filing
U-1/A	U-1/A	26y ago1999-08-26	-	View filing
U-57	U-57	26y ago1999-08-20	-	View filing
U-1/A	U-1/A	26y ago1999-08-16	-	View filing
10-Q	Quarterly report	26y ago1999-08-16	1999-06-30	View filing
U-57	U-57	26y ago1999-07-30	-	View filing
U-57	U-57	26y ago1999-07-30	-	View filing
U-1/A	U-1/A	26y ago1999-07-30	-	View filing
U-1/A	U-1/A	27y ago1999-07-20	-	View filing
15-15D	15-15D	27y ago1999-06-25	-	View filing
15-15D	15-15D	27y ago1999-06-25	-	View filing
15-15D	15-15D	27y ago1999-06-25	-	View filing
U5S/A	U5S/A	27y ago1999-06-18	1998-12-31	View filing
U5S/A	U5S/A	27y ago1999-06-15	1998-12-31	View filing
SC 13D/A	Activist ownership stake (update)	27y ago1999-06-10	-	View filing

ALLIANT ENERGY CORP

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