Form 8-K - Current report:
SEC Accession No. 0000352541-25-000074
Filing Date
2025-09-11
Accepted
2025-09-10 21:34:36
Documents
21
Period of Report
2025-09-08
Items
Item 8.01: Other Events
Item 9.01: Financial Statements and Exhibits

Document Format Files

Seq Description Document Type Size
1 8-K lnt-20250908.htm   iXBRL 8-K 35751
2 EX-1.1 lnt090820258-kex11.htm EX-1.1 345513
3 EX-4.1 lnt090820258-kex41.htm EX-4.1 57112
4 EX-5.1 lnt090820258-kex51.htm EX-5.1 44199
5 EX-5.2 lnt090820258-kex52.htm EX-5.2 15808
6 EX-99.1 lnt090820258-kex991.htm EX-99.1 8154
11 GRAPHIC exhibit9911a.jpg GRAPHIC 17931
12 GRAPHIC header.jpg GRAPHIC 3106
13 GRAPHIC simmons.jpg GRAPHIC 36370
  Complete submission text file 0000352541-25-000074.txt   819814

Data Files

Seq Description Document Type Size
7 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT lnt-20250908.xsd EX-101.SCH 2563
8 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT lnt-20250908_def.xml EX-101.DEF 14743
9 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT lnt-20250908_lab.xml EX-101.LAB 26124
10 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT lnt-20250908_pre.xml EX-101.PRE 15408
23 EXTRACTED XBRL INSTANCE DOCUMENT lnt-20250908_htm.xml XML 4434
Mailing Address 200 FIRST ST SE ALLIANT ENERGY TOWER CEDAR RAPIDS IA 52401
Business Address 200 FIRST ST SE ALLIANT ENERGY TOWER CEDAR RAPIDS IA 52401 3193984411
INTERSTATE POWER & LIGHT CO (Filer) CIK: 0000052485 (see all company filings)

EIN.: 420331370 | State of Incorp.: IA | Fiscal Year End: 1231
Type: 8-K | Act: 34 | File No.: 001-04117 | Film No.: 251307088
SIC: 4931 Electric & Other Services Combined
(CF Office: 01 Energy & Transportation)

Mailing Address 4902 NORTH BILTMORE LANE SUITE 1000 MADISON WI 53718-2148
Business Address 4902 NORTH BILTMORE LANE SUITE 1000 MADISON WI 53718-2148 608-458-3311
ALLIANT ENERGY CORP (Filer) CIK: 0000352541 (see all company filings)

EIN.: 391380265 | State of Incorp.: WI | Fiscal Year End: 1231
Type: 8-K | Act: 34 | File No.: 001-09894 | Film No.: 251307087
SIC: 4931 Electric & Other Services Combined
(CF Office: 01 Energy & Transportation)