Form 10-Q - Quarterly report [Sections 13 or 15(d)]:
SEC Accession No. 0000352541-26-000043
Filing Date
2026-07-31
Accepted
2026-07-31 11:22:47
Documents
95
Period of Report
2026-06-30

Document Format Files

Seq Description Document Type Size
1 10-Q lnt-20260630.htm   iXBRL 10-Q 2691746
2 AMENDED AND RESTATED BYLAWS, ALLIANT ENERGY lnt630202610-qex31.htm EX-3.1 155564
3 AMENDED AND RESTATED BYLAWS, IPL lnt630202610-qex32.htm EX-3.2 91303
4 AMENDED AND RESTATED BYLAWS, WPL lnt630202610-qex33.htm EX-3.3 102758
5 CERTIFICATION OF THE CEO FOR ALLIANT ENERGY lnt630202610-qex311.htm EX-31.1 9362
6 CERTIFICATION OF THE CFO FOR ALLIANT ENERGY lnt630202610-qex312.htm EX-31.2 9383
7 CERTIFICATION OF THE CEO FOR IPL lnt630202610-qex313.htm EX-31.3 9353
8 CERTIFICATION OF THE CFO FOR IPL lnt630202610-qex314.htm EX-31.4 9388
9 CERTIFICATION OF THE CEO FOR WPL lnt630202610-qex315.htm EX-31.5 9404
10 CERTIFICATION OF THE CFO FOR WPL lnt630202610-qex316.htm EX-31.6 9650
11 WRITTEN STATEMENT OF CEO AND CFO PURSUANT TO 18 U.S.C. 1350 FOR ALLIANT ENERGY lnt630202610-qex321.htm EX-32.1 4365
12 WRITTEN STATEMENT OF CEO AND CFO PURSUANT TO 18 U.S.C. 1350 FOR IPL lnt630202610-qex322.htm EX-32.2 4321
13 WRITTEN STATEMENT OF CEO AND CFO PURSUANT TO 18 U.S.C. 1350 FOR WPL lnt630202610-qex323.htm EX-32.3 4448
19 GRAPHIC lnt-20260630_g1.jpg GRAPHIC 319349
  Complete submission text file 0000352541-26-000043.txt   22346220

Data Files

Seq Description Document Type Size
14 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT lnt-20260630.xsd EX-101.SCH 60398
15 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT lnt-20260630_cal.xml EX-101.CAL 62780
16 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT lnt-20260630_def.xml EX-101.DEF 665479
17 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT lnt-20260630_lab.xml EX-101.LAB 739242
18 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT lnt-20260630_pre.xml EX-101.PRE 740449
98 EXTRACTED XBRL INSTANCE DOCUMENT lnt-20260630_htm.xml XML 6909695
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: 10-Q | Act: 34 | File No.: 001-04117 | Film No.: 261226590
SIC: 4931 Electric & Other Services Combined
(CF Office: 01 Energy & Transportation)

Mailing Address 4902 N BILTMORE LANE SUITE 1000 MADISON WI 53718-2148
Business Address 4902 NORTH BILTMORE LANE SUITE 1000 MADISON WI 53718-2148 608-458-3311
WISCONSIN POWER & LIGHT CO (Filer) CIK: 0000107832 (see all company filings)

EIN.: 390714890 | State of Incorp.: WI | Fiscal Year End: 1231
Type: 10-Q | Act: 34 | File No.: 000-00337 | Film No.: 261226589
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: 10-Q | Act: 34 | File No.: 001-09894 | Film No.: 261226588
SIC: 4931 Electric & Other Services Combined
(CF Office: 01 Energy & Transportation)