# Filing Detail

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)

EIN.: 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)

EIN.: 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)

EIN.: 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