Company facts
- Industry
- Electric & Other Services Combined
- Headquarters
- Madison, Wisconsin
- Most recent report
- 10-Q, filed Oct 30, 2026
- Incorporated
- Wisconsin
- Filings on record
- 1,001+ filings
- On EDGAR
- CIK 352541
- Fiscal year ends
- December
- Filer status
- Large accelerated filer
Financials 8 of 52
News 8 of 157
Prospectuses and Registrations 8 of 35
- S-3ASR Automatic shelf registration Nov 6, 2026
- 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
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 701
- 4 Insider reported a trade Oct 14, 2026
- 4 Insider reported a trade Oct 14, 2026
- 4 Insider reported a trade Oct 14, 2026
- 4 Insider reported a trade Oct 14, 2026
- 4 Insider reported a trade Oct 14, 2026
- 4 Insider reported a trade Oct 14, 2026
- 4 Insider reported a trade Oct 14, 2026
- 4 Insider reported a trade Oct 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
What to read: Sep 2026 10-Q
SECSift found 2 of 11 sections worth reading, with 1 positive, 11 notable, and 1 negative flags.
Financial Statements (Item 1)
Financial statements and notes with material balance-sheet, debt, and equity changes.Notable- WPL lease modification added $70M to property and liabilities for Sheboygan Falls Unit 2 upgrade.
- IPL's receivables sale program limit cut to $60M (Sep 2026) from $180M max; no capacity available.
- New $1B ATM program (2026) with 6.9M shares unsettled at $72.89; prior program has 18.7M shares unsettled at $66.01.
- Unsettled forward sales under both ATM programs could dilute shares by up to 25.6M shares (9.9% of outstanding).
- IPL issued $500M of 5.1% senior debentures due 2031 in Aug 2026.
- Data center customer switched from WPL to IPL, causing $12M tax benefit in Q1 2026 from apportionment change.
- Alliant Energy received $61M tariff refunds in Oct 2026 from Supreme Court IEEPA ruling, reducing construction costs.
- Guarantees for data center transmission infrastructure total $324M (IPL $199M, WPL $125M) if projects terminate.
Management's Discussion (Item 2)
Massive capex plan, DOE loan guarantees, equity dilution, and data center demand drive this section.PositiveNotable- Data center agreements add 370 MW contracted peak demand at IPL and an approved ICR at WPL.
- IPL and WPL secured DOE loan guarantees up to $5.1B total for energy infrastructure, no amounts drawn yet.
- Planned $18.8B in construction 2026-2030, with $4.7B peak in 2028, focused on gas, renewables, and storage.
What changed: Sep 2026 vs. Jun 2026
About 14% of LNT's Sep 2026 10-Q is new information. 43 paragraphs were added, 108 changed, and 22 removed. Below are the most important lines SECSift identified.
New
- Added Exhibit 4.1: Officer’s Certificate creating IPL’s 5.100% Senior Debentures due September 30, 2031.
- IPL filed for up to 170 MW energy storage at English Farms in September 2026; decision expected Q1 2027.
- IPL filed for up to 175 MW energy storage at Marshalltown in July 2026; IUC decision expected Q4 2026.
- IUC authorized IPL to add 125 MW energy storage at Whispering Willow, raising total to ~200 MW in August 2026.
- PSCW authorized WPL to build a 2 billion cubic feet LNG facility in Rock County, Wisconsin in October 2026.
Everything here comes from Alliant Energy Corp's own filings on SEC EDGAR. The filing list is rechecked every hour. SECSift analysis was completed on Oct 30, 2026, from the 10-Q for Sep 2026.