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Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0000352541-21-000022
Filing Date
2021-02-19
Accepted
2021-02-19 14:31:18
Documents
161
Period of Report
2020-12-31

Document Format Files

Seq Description Document Type Size
1 10-K lnt-20201231.htm   iXBRL 10-K 7198330
2 SUMMARY OF COMPENSATION AND BENEFITS FOR NON-EMPLOYEE DIRECTORS lnt1231202010-kex1014.htm EX-10.14 7488
3 SUBSIDIARIES OF ALLIANT ENERGY lnt1231202010-kex211.htm EX-21.1 3479
4 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM FOR ALLIANT ENERGY lnt1231202010-kex231.htm EX-23.1 2420
5 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM FOR IPL lnt1231202010-kex232.htm EX-23.2 2174
6 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM FOR WPL lnt1231202010-kex233.htm EX-23.3 2172
7 CERTIFICATION OF THE CEO FOR ALLIANT ENERGY lnt1231202010-kex311.htm EX-31.1 9486
8 CERTIFICATION OF THE CFO FOR ALLIANT ENERGY lnt1231202010-kex312.htm EX-31.2 9497
9 CERTIFICATION OF THE CEO FOR IPL lnt1231202010-kex313.htm EX-31.3 9482
10 CERTIFICATION OF THE CFO FOR IPL lnt1231202010-kex314.htm EX-31.4 9503
11 CERTIFICATION OF THE CEO FOR WPL lnt1231202010-kex315.htm EX-31.5 9479
12 CERTIFICATION OF THE CFO FOR WPL lnt1231202010-kex316.htm EX-31.6 9501
13 WRITTEN STATEMENT OF CEO AND CFO PURSUANT TO 18 U.S.C.1350 FOR ALLIANT ENERGY lnt1231202010-kex321.htm EX-32.1 4450
14 WRITTEN STATEMENT OF CEO AND CFO PURSUANT TO 18 U.S.C.1350 FOR IPL lnt1231202010-kex322.htm EX-32.2 4436
15 WRITTEN STATEMENT OF CEO AND CFO PURSUANT TO 18 U.S.C.1350 FOR WPL lnt1231202010-kex323.htm EX-32.3 4435
21 GRAPHIC lnt-20201231_g1.jpg GRAPHIC 334542
22 GRAPHIC lnt-20201231_g2.jpg GRAPHIC 13249
23 GRAPHIC lnt-20201231_g3.jpg GRAPHIC 13247
24 GRAPHIC lnt-20201231_g4.jpg GRAPHIC 11606
25 GRAPHIC lnt-20201231_g5.jpg GRAPHIC 11627
26 GRAPHIC lnt-20201231_g6.jpg GRAPHIC 13604
27 GRAPHIC lnt-20201231_g7.jpg GRAPHIC 10675
28 GRAPHIC lnt-20201231_g8.jpg GRAPHIC 10746
  Complete submission text file 0000352541-21-000022.txt   44729163

Data Files

Seq Description Document Type Size
16 XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT lnt-20201231.xsd EX-101.SCH 118147
17 XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT lnt-20201231_cal.xml EX-101.CAL 145024
18 XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT lnt-20201231_def.xml EX-101.DEF 1160625
19 XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT lnt-20201231_lab.xml EX-101.LAB 1247902
20 XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT lnt-20201231_pre.xml EX-101.PRE 1222030
29 EXTRACTED XBRL INSTANCE DOCUMENT lnt-20201231_htm.xml XML 15173147
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)

IRS No.: 420331370 | State of Incorp.: IA | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-04117 | Film No.: 21654588
SIC: 4931 Electric & Other Services Combined

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)

IRS No.: 390714890 | State of Incorp.: WI | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 000-00337 | Film No.: 21654587
SIC: 4931 Electric & Other Services Combined

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)

IRS No.: 391380265 | State of Incorp.: WI | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-09894 | Film No.: 21654586
SIC: 4931 Electric & Other Services Combined