Form POSASR - Post-effective Amendment to an automatic shelf registration statement:
SEC Accession No. 0001193125-25-210261
Filing Date
2025-09-22
Accepted
2025-09-22 09:39:04
Documents
18
Effectiveness Date
2025-09-22

Document Format Files

Seq Description Document Type Size
1 POSASR d84496dposasr.htm POSASR 316805
2 EX-4.9 d84496dex49.htm EX-4.9 451670
3 EX-23.5 d84496dex235.htm EX-23.5 2141
4 EX-24.2 d84496dex242.htm EX-24.2 3276
5 EX-24.4 d84496dex244.htm EX-24.4 3284
6 EX-24.6 d84496dex246.htm EX-24.6 3283
7 EX-25.2 d84496dex252.htm EX-25.2 53422
8 EX-FILING FEES d84496dexfilingfees.htm   iXBRL EX-FILING FEES 96198
  Complete submission text file 0001193125-25-210261.txt   1115484

Data Files

Seq Description Document Type Size
20 EXTRACTED XBRL INSTANCE DOCUMENT d84496dexfilingfees_htm.xml XML 31671
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: POSASR | Act: 33 | File No.: 333-276062-01 | Film No.: 251328694
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: POSASR | Act: 33 | File No.: 333-276062-02 | Film No.: 251328693
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: POSASR | Act: 33 | File No.: 333-276062 | Film No.: 251328692
SIC: 4931 Electric & Other Services Combined
(CF Office: 01 Energy & Transportation)