ALLIANT ENERGY CORP — Investor Relations & Filings
Filings indexed
1,486
across all filing types
Latest filing
2026-05-21
Regulatory Filings
Country
US
United States of America
Listing
US
LNT
Alliant Energy Corporation is a public utility holding company providing regulated energy services. Its core activities include the generation and distribution of electricity and the distribution of natural gas. The company serves approximately one million electric and 425,000 natural gas customers, primarily in Iowa and Wisconsin. Alliant Energy emphasizes a balanced energy mix and is a significant owner-operator of regulated wind and solar assets. The company's mission is to deliver energy solutions and services safely, efficiently, and responsibly to its customers and communities.
Recent filings
| Filing | Released | Lang | Actions |
|---|---|---|---|
| 8-K | 2026-05-21 | English | |
| 10-Q - ALLIANT ENERGY CORP (0000352541) (Filer) | 2026-05-01 | English | |
| 8-K | 2026-05-01 | English | |
| Major Shareholding Notification 2026 | 2026-04-29 | English | |
| Major Shareholding Notification 2026 | 2026-04-28 | English | |
| ARS | 2026-03-31 | English |
Browse filings by year
17 years| ID | Filing | Released | Lang | Actions | |
|---|---|---|---|---|---|
|
2026
15 filings
| |||||
| 46753874 | 8-K | 2026-05-21 | English | ||
| 39539343 | 10-Q - ALLIANT ENERGY CORP (0000352541) (Filer) | 2026-05-01 | English | ||
| 46070030 | 8-K | 2026-05-01 | English | ||
| 46070032 | Major Shareholding Notification 2026 | 2026-04-29 | English | ||
| 46070033 | Major Shareholding Notification 2026 | 2026-04-28 | English | ||
| 46070034 | ARS | 2026-03-31 | English | ||
| 46070035 | DEFA14A | 2026-03-31 | English | ||
| 46070037 | DEF 14A | 2026-03-31 | English | ||
| 33051793 | SCHEDULE 13G/A - ALLIANT ENERGY CORP (0000352541) (Subject) | 2026-03-26 | English | ||
| 32989878 | 8-K - ALLIANT ENERGY CORP (0000352541) (Filer) | 2026-03-19 | English | ||
| 32989875 | 424B5 - ALLIANT ENERGY CORP (0000352541) (Filer) | 2026-03-19 | English | ||
| 32989600 | 4/A - ALLIANT ENERGY CORP (0000352541) (Issuer) | 2026-03-19 | English | ||
| 46070036 | 8-K | 2026-03-04 | English | ||
| 32879732 | 4 - ALLIANT ENERGY CORP (0000352541) (Filer) | 2026-02-24 | English | ||
| 32879734 | 4 - ALLIANT ENERGY CORP (0000352541) (Filer) | 2026-02-24 | English | ||
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Peer group · Electric power transmission and distribution activities
| Company | Ticker | Country | Sector |
|---|---|---|---|
|
Dala Energi AB
A regional provider of electricity, heating, and fiber opti…
|
DE | SE | Electricity, gas, steam and air… |
|
Desarrolladora Energética S.A.
A company focused on the development of energy projects and…
|
DESA | ES | Electricity, gas, steam and air… |
|
Distribuzione Elettrica Adriatica S.p.A.
Manages low/medium voltage grids, supplies power, and conne…
|
DEA | IT | Electricity, gas, steam and air… |
|
DPSC Limited
Integrated power utility managing generation, transmission,…
|
DPSCLTD | IN | Electricity, gas, steam and air… |
|
DTE ENERGY CO
A diversified energy company providing electricity and natu…
|
DTE | US | Electricity, gas, steam and air… |
|
Dubai Electricity & Water Authority PJSC
Public service infrastructure company generating, transmitt…
|
DEWA | AE | Electricity, gas, steam and air… |
|
Duke Energy CORP
An energy holding company that generates and distributes el…
|
DUK | US | Electricity, gas, steam and air… |
|
EDENOR
Major electricity distributor serving approximately nine mi…
|
EDN | US | Electricity, gas, steam and air… |
|
Edesa Holding S.A.
Generates, distributes, and markets electricity to customer…
|
— | AR | Electricity, gas, steam and air… |
|
Edesal Holding S.A.
Investment holding company focused on the sub-transport and…
|
— | AR | Electricity, gas, steam and air… |
ALLIANT ENERGY CORP via the API
Pull this company's filings, identifiers, and metadata as JSON or Markdown. Authenticate with your API key, then query by company ID, ISIN, or LEI. Full schema documented in the OpenAPI spec.
Endpoints
| GET | /api/companies/30351/ | Company identity, sector, listing, identifiers |
| GET | /api/filings/?company=30351 | Paginated list of all filings (filterable by type, date, language) |
| GET | /api/filings/{id}/ | Single filing — metadata, document URL, processing status |
| GET | /api/filings/{id}/markdown/ | Filing content as Markdown (PDF → text/tables/figures) |
| GET | /api/isins/?company=30351 | All ISINs registered to this company |
| GET | /api/filing-types/ | Reference: every filing-type code + category |
Full reference: API reference · OpenAPI schema
cURL
$ curl https://api.financialreports.eu/api/filings/?company=30351 \ -H "x-api-key: $FR_API_KEY" \ -H "Accept: application/json"
Python
import requests r = requests.get( "https://api.financialreports.eu/api/filings/", params={"company": 30351}, headers={"x-api-key": API_KEY}, ) filings = r.json()["results"]
MCP server
// MCP server URL https://mcp.financialfilings.com/mcp // Once connected, the LLM can query this company directly: "Pull the latest 5 filings for ALLIANT ENERGY CORP (id: 30351)"
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