# Filing Detail

Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]:
SEC Accession No. 0000352541-22-000020
Filing Date
2022-02-18
Accepted
2022-02-18 12:53:31
Documents
164
Period of Report
2021-12-31

Document Format Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
1 | 10-K | lnt-20211231.htm iXBRL | 10-K | 7351387
2 | EX-10.3D | lnt1231202110-kex103d.htm | EX-10.3D | 71554
3 | EX-10.3E | lnt1231202110-kex103e.htm | EX-10.3E | 50737
4 | EX-10.3F | lnt1231202110-kex103f.htm | EX-10.3F | 72108
5 | EX-10.3G | lnt1231202110-kex103g.htm | EX-10.3G | 70397
6 | EX-10.14 | lnt1231202110-kex1014.htm | EX-10.14 | 7413
7 | EX-21.1 | lnt1231202110-kex211.htm | EX-21.1 | 3456
8 | EX-23.1 | lnt1231202110-kex231.htm | EX-23.1 | 2352
9 | EX-23.2 | lnt1231202110-kex232.htm | EX-23.2 | 2119
10 | EX-23.3 | lnt1231202110-kex233.htm | EX-23.3 | 2116
11 | EX-31.1 | lnt1231202110-kex311.htm | EX-31.1 | 9448
12 | EX-31.2 | lnt1231202110-kex312.htm | EX-31.2 | 9462
13 | EX-31.3 | lnt1231202110-kex313.htm | EX-31.3 | 9455
14 | EX-31.4 | lnt1231202110-kex314.htm | EX-31.4 | 9478
15 | EX-31.5 | lnt1231202110-kex315.htm | EX-31.5 | 9451
16 | EX-31.6 | lnt1231202110-kex316.htm | EX-31.6 | 9476
17 | EX-32.1 | lnt1231202110-kex321.htm | EX-32.1 | 4377
18 | EX-32.2 | lnt1231202110-kex322.htm | EX-32.2 | 4374
19 | EX-32.3 | lnt1231202110-kex323.htm | EX-32.3 | 4373
25 | GRAPHIC | lnt-20211231_g1.jpg | GRAPHIC | 334542
26 | GRAPHIC | lnt-20211231_g2.jpg | GRAPHIC | 12998
27 | GRAPHIC | lnt-20211231_g3.jpg | GRAPHIC | 12978
28 | GRAPHIC | lnt-20211231_g4.jpg | GRAPHIC | 11603
29 | GRAPHIC | lnt-20211231_g5.jpg | GRAPHIC | 11898
30 | GRAPHIC | lnt-20211231_g6.jpg | GRAPHIC | 11859
31 | GRAPHIC | lnt-20211231_g7.jpg | GRAPHIC | 9574
32 | GRAPHIC | lnt-20211231_g8.jpg | GRAPHIC | 10754
| Complete submission text file | 0000352541-22-000020.txt |  | 46176479

Data Files

Seq | Description | Document | Type | Size
--- | --- | --- | --- | ---
20 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | lnt-20211231.xsd | EX-101.SCH | 116188
21 | XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT | lnt-20211231_cal.xml | EX-101.CAL | 108826
22 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | lnt-20211231_def.xml | EX-101.DEF | 1161270
23 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | lnt-20211231_lab.xml | EX-101.LAB | 1248886
24 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | lnt-20211231_pre.xml | EX-101.PRE | 1220148
158 | EXTRACTED XBRL INSTANCE DOCUMENT | lnt-20211231_htm.xml | XML | 15682649

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-K | Act: 34 | File No.: 001-04117 | Film No.: 22651869
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)

EIN.: 390714890 | State of Incorp.: WI | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 000-00337 | Film No.: 22651868
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)

EIN.: 391380265 | State of Incorp.: WI | Fiscal Year End: 1231
Type: 10-K | Act: 34 | File No.: 001-09894 | Film No.: 22651867
SIC: 4931 Electric & Other Services Combined