Company facts
- Industry
- Electric & Other Services Combined
- Headquarters
- Madison, Wisconsin
- Most recent report
- 10-Q, filed Jul 31, 2026
- Incorporated
- Wisconsin
- Filings on record
- 1,010+ filings
- On EDGAR
- CIK 352541
- Fiscal year ends
- December
- Filer status
- Large accelerated filer
Financials 8 of 51
News 8 of 155
Prospectuses and Registrations 8 of 34
- 424B5 Prospectus supplement for an offering Mar 19, 2026
- S-8 POS Post-effective amendment to an employee plan registration Feb 9, 2026
- S-8 POS Post-effective amendment to an employee plan registration Feb 9, 2026
- S-8 POS Post-effective amendment to an employee plan registration Feb 9, 2026
- S-8 POS Post-effective amendment to an employee plan registration Feb 9, 2026
- S-8 POS Post-effective amendment to an employee plan registration Feb 9, 2026
- S-8 POS Post-effective amendment to an employee plan registration Feb 9, 2026
- S-8 POS Post-effective amendment to an employee plan registration Feb 9, 2026
Proxies 8 of 23
- DEFA14A Extra proxy material Mar 31, 2026
- DEF 14A Proxy statement for a shareholder vote Mar 31, 2026
- PX14A6G Shareholder's own proxy material May 8, 2025
- DEFA14A Extra proxy material Apr 1, 2025
- DEF 14A Proxy statement for a shareholder vote Apr 1, 2025
- DEFA14A Extra proxy material Apr 2, 2024
- DEF 14A Proxy statement for a shareholder vote Apr 2, 2024
- DEFA14A Extra proxy material Apr 4, 2023
Ownership 8 of 714
- 4 Insider reported a trade Aug 12, 2026
- 4 Insider reported a trade Jul 14, 2026
- 4 Insider reported a trade Jul 14, 2026
- 4 Insider reported a trade Jul 14, 2026
- 4 Insider reported a trade Jul 14, 2026
- 4 Insider reported a trade Jul 14, 2026
- 4 Insider reported a trade Jul 14, 2026
- 4 Insider reported a trade Jul 14, 2026
Other 8 of 33
- 11-K Employee stock plan report Jun 16, 2026
- ARS Annual report sent to shareholders Mar 31, 2026
- POSASR Sep 22, 2025
- 11-K Employee stock plan report Jun 24, 2025
- ARS Annual report sent to shareholders Apr 1, 2025
- 11-K Employee stock plan report Jun 20, 2024
- ARS Annual report sent to shareholders Apr 2, 2024
- UPLOAD Comment letter from SEC staff Dec 19, 2023
Everything here comes from Alliant Energy Corp's own filings on SEC EDGAR. The filing list is rechecked every hour.