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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 CIK#: 0000352541 (see all company filings)

SIC: 4931 - ELECTRIC & OTHER SERVICES COMBINED
State location: WI | State of Inc.: WI | Fiscal Year End: 1231
formerly: INTERSTATE ENERGY CORP (filings through 1999-05-13)
formerly: WPL HOLDINGS INC (filings through 1998-02-23)
(CF Office: 01 Energy & Transportation)
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Items 1 - 40  0000352541 Filings RSS Feed
Filings Format Description Filing Date File/Film Number
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000352541-24-000058 (34 Act)  Size: 16 MB
2024-05-03 001-09894
24911713
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0000352541-24-000054 (34 Act)  Size: 987 KB
2024-05-03 001-09894
24910127
ARS  Documents Annual Report to Security Holders
Acc-no: 0000352541-24-000040 (34 Act)  Size: 37 MB
2024-04-02 001-09894
24811319
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0000352541-24-000039 (34 Act)  Size: 222 KB
2024-04-02 001-09894
24811311
DEF 14A  Documents   Interactive Data Other definitive proxy statements
Acc-no: 0000352541-24-000038 (34 Act)  Size: 25 MB
2024-04-02 001-09894
24811307
8-K  Documents   Interactive Data Current report, item 5.02
Acc-no: 0000352541-24-000032 (34 Act)  Size: 203 KB
2024-03-08 001-09894
24735388
8-K  Documents   Interactive Data Current report, items 8.01 and 9.01
Acc-no: 0000352541-24-000029 (34 Act)  Size: 894 KB
2024-03-07 001-09894
24727638
8-K  Documents   Interactive Data Current report, items 1.01, 2.03, and 9.01
Acc-no: 0000352541-24-000026 (34 Act)  Size: 1 MB
2024-03-05 001-09894
24721358
10-K  Documents   Interactive Data Annual report [Section 13 and 15(d), not S-K Item 405]
Acc-no: 0000352541-24-000014 (34 Act)  Size: 44 MB
2024-02-16 001-09894
24647408
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0000352541-24-000011 (34 Act)  Size: 1 MB
2024-02-16 001-09894
24645148
8-K  Documents   Interactive Data Current report, item 5.02
Acc-no: 0000352541-24-000009 (34 Act)  Size: 205 KB
2024-02-13 001-09894
24629866
SC 13G/A  Documents [Amend] Statement of acquisition of beneficial ownership by individuals
Acc-no: 0001104659-24-019999 (34 Act)  Size: 13 KB
2024-02-13 005-44529
24627157
SC 13G/A  Documents [Amend] Statement of acquisition of beneficial ownership by individuals
Acc-no: 0000093751-24-000466 (34 Act)  Size: 8 KB
2024-01-30 005-44529
24577486
SC 13G/A  Documents [Amend] Statement of acquisition of beneficial ownership by individuals
Acc-no: 0001086364-24-002709 (34 Act)  Size: 14 KB
2024-01-24 005-44529
24557846
UPLOAD  Documents [Cover]SEC-generated letter
Acc-no: 0000000000-23-013828 Size: 41 KB
2023-12-19
CORRESP  Documents [Cover]Correspondence
Acc-no: 0000352541-23-000124 Size: 9 KB
2023-12-15
S-3ASR  Documents Automatic shelf registration statement of securities of well-known seasoned issuers
Acc-no: 0000352541-23-000122 (33 Act)  Size: 1 MB
2023-12-15 333-276062
231489612
CORRESP  Documents [Cover]Correspondence
Acc-no: 0000352541-23-000117 Size: 63 KB
2023-12-01
UPLOAD  Documents [Cover]SEC-generated letter
Acc-no: 0000000000-23-012923 Size: 45 KB
2023-11-28
8-K  Documents   Interactive Data Current report, items 1.01, 2.03, 8.01, and 9.01
Acc-no: 0000352541-23-000115 (34 Act)  Size: 1 MB
2023-11-13 001-09894
231396531
S-3ASR  Documents Automatic shelf registration statement of securities of well-known seasoned issuers
Acc-no: 0000352541-23-000110 (33 Act)  Size: 654 KB
2023-11-06 333-275338
231379188
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000352541-23-000108 (34 Act)  Size: 20 MB
2023-11-03 001-09894
231375107
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0000352541-23-000106 (34 Act)  Size: 1 MB
2023-11-03 001-09894
231373884
8-K  Documents   Interactive Data Current report, item 5.02
Acc-no: 0000352541-23-000104 (34 Act)  Size: 209 KB
2023-10-26 001-09894
231350550
8-K  Documents   Interactive Data Current report, items 8.01 and 9.01
Acc-no: 0000352541-23-000096 (34 Act)  Size: 1 MB
2023-09-21 001-09894
231267457
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000352541-23-000091 (34 Act)  Size: 20 MB
2023-08-04 001-09894
231142868
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0000352541-23-000088 (34 Act)  Size: 1 MB
2023-08-04 001-09894
231141499
8-K  Documents   Interactive Data Current report, item 5.02
Acc-no: 0000352541-23-000083 (34 Act)  Size: 206 KB
2023-07-14 001-09894
231088134
11-K  Documents Annual report of employee stock purchase, savings and similar plans
Acc-no: 0000352541-23-000069 (34 Act)  Size: 168 KB
2023-06-22 001-09894
231033093
8-K  Documents   Interactive Data Current report, item 5.07
Acc-no: 0000352541-23-000061 (34 Act)  Size: 207 KB
2023-05-25 001-09894
23959968
10-Q  Documents   Interactive Data Quarterly report [Sections 13 or 15(d)]
Acc-no: 0000352541-23-000059 (34 Act)  Size: 18 MB
2023-05-05 001-09894
23892127
8-K  Documents   Interactive Data Current report, items 2.02 and 9.01
Acc-no: 0000352541-23-000056 (34 Act)  Size: 1 MB
2023-05-05 001-09894
23890446
ARS  Documents Annual Report to Security Holders
Acc-no: 0000352541-23-000047 (34 Act)  Size: 1 MB
2023-04-04 001-09894
23794384
DEFA14A  Documents Additional definitive proxy soliciting materials and Rule 14(a)(12) material
Acc-no: 0000352541-23-000044 (34 Act)  Size: 206 KB
2023-04-04 001-09894
23794336
DEF 14A  Documents   Interactive Data Other definitive proxy statements
Acc-no: 0000352541-23-000042 (34 Act)  Size: 30 MB
2023-04-04 001-09894
23794319
8-K  Documents   Interactive Data Current report, items 8.01 and 9.01
Acc-no: 0000352541-23-000035 (34 Act)  Size: 903 KB
2023-03-30 001-09894
23776675
8-K  Documents   Interactive Data Current report, item 2.03
Acc-no: 0000352541-23-000032 (34 Act)  Size: 211 KB
2023-03-16 001-09894
23739824
8-K  Documents   Interactive Data Current report, items 2.03 and 3.02
Acc-no: 0000352541-23-000030 (34 Act)  Size: 194 KB
2023-03-13 001-09894
23727629
8-K  Documents   Interactive Data Current report, items 1.01, 2.03, 3.02, 8.01, and 9.01
Acc-no: 0000352541-23-000028 (34 Act)  Size: 1 MB
2023-03-03 001-09894
23700831
10-K  Documents   Interactive Data Annual report [Section 13 and 15(d), not S-K Item 405]
Acc-no: 0000352541-23-000017 (34 Act)  Size: 45 MB
2023-02-24 001-09894
23666946