ALLIANT ENERGY CORP — Investor Relations & Filings
Filings indexed
1,486
across all filing types
Latest filing
2026-05-21
Declaration of Voting R…
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 |
|---|---|---|---|
|
Energy Vault Holdings, Inc.
Develops and operates gravity, battery, and green hydrogen …
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NRGV | US | Electricity, gas, steam and air… |
|
ENERJİSA ENERJİ A.Ş.
An energy company providing electricity distribution and re…
|
ENJSA | TR | Electricity, gas, steam and air… |
|
ENGIE
Global provider of electricity, natural gas, and low-carbon…
|
ENGI | FR | Electricity, gas, steam and air… |
|
ENTERGY ARKANSAS, LLC
Electric utility generating and distributing power to 730,0…
|
EAI | US | Electricity, gas, steam and air… |
|
ENTERGY CORP /DE/
An integrated energy company that produces and distributes …
|
ETR | US | Electricity, gas, steam and air… |
|
ENTERGY LOUISIANA, LLC
An electric utility serving 1.1 million customers across 58…
|
ELC | US | Electricity, gas, steam and air… |
|
ENTERGY MISSISSIPPI, LLC
Generates, transmits, and distributes electric power to ove…
|
EMP | US | Electricity, gas, steam and air… |
|
ENTERGY NEW ORLEANS, LLC
An electric and natural gas utility serving Orleans Parish,…
|
ENJ | US | Electricity, gas, steam and air… |
|
ENTERGY TEXAS, INC.
Electric utility providing power to 524,000 customers in So…
|
ETI-P | US | Electricity, gas, steam and air… |
|
E.ON SE
A European energy company focused on energy networks and cu…
|
EOAN | DE | 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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