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 | ||
Market data
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Peer group · Electric power transmission and distribution activities
| Company | Ticker | Country | Sector |
|---|---|---|---|
|
CENTRAIS ELETRICAS DE SANTA CATARINA S.A
Specializes in the generation, transmission, and distributi…
|
— | BR | Electricity, gas, steam and air… |
|
CESC Limited
Vertically integrated power utility generating and distribu…
|
CESC | IN | Electricity, gas, steam and air… |
|
CEZ A.S.
An integrated energy conglomerate in electricity, heat, nat…
|
CEZ | CZ | Electricity, gas, steam and air… |
|
CGE TRANSMISION S.A.
Specializes in electric power transmission, transferring en…
|
— | CL | Electricity, gas, steam and air… |
|
Chernigovoblenergo
Distributes and supplies electricity to consumers in the Ch…
|
CHEON | UA | Electricity, gas, steam and air… |
|
CHILQUINTA DISTRIBUCION S.A.
An electricity distribution company delivering energy to 2M…
|
— | CL | Electricity, gas, steam and air… |
|
China ITS (Holdings) Co., Ltd.
Supplies infrastructure tech solutions, products, and servi…
|
1900 | HK | Electricity, gas, steam and air… |
|
CHONGQING FULING ELECTRIC POWER COMPANY LTD.
Provides electricity distribution, grid management, and ene…
|
600452 | CN | Electricity, gas, steam and air… |
|
Chongqing Three Gorges Water Conservancy and Electric Power Co.,Ltd.
Integrated energy firm providing hydropower generation, tra…
|
600116 | CN | Electricity, gas, steam and air… |
|
CIA DE ELETRICIDADE DO ESTADO DA BAHIA - COELBA
Public utility specializing in electricity generation, tran…
|
— | BR | 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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