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
Market data not available
Last price
Market cap
volume
Day range
today
52-week range
trailing
Price history
Peer group · Electric power transmission and distribution activities
| Company | Ticker | Country | Sector |
|---|---|---|---|
|
Công ty Cổ phần Đầu tư Phát triển Nhà và Đô thị IDICO
Focuses on energy solutions for industrial parks, housing, …
|
UIC | VN | Electricity, gas, steam and air… |
|
Công ty Cổ phần Điện lực Khánh Hòa
Produces and distributes electricity, operates power plants…
|
KHP | VN | Electricity, gas, steam and air… |
|
CONSOLIDATED EDISON INC
An investor-owned energy company providing electric, gas, a…
|
ED | US | Electricity, gas, steam and air… |
|
Constellation Energy Corp
A large-scale producer of carbon-free energy and supplier o…
|
CEG | US | Electricity, gas, steam and air… |
|
CONSUMERS ENERGY CO
An investor-owned utility providing natural gas and electri…
|
CMS-PB | US | Electricity, gas, steam and air… |
|
Cornerstone Technologies Holdings Limited
Supplies, installs, and operates Hong Kong's premier and mo…
|
8391 | HK | Electricity, gas, steam and air… |
|
Corre Energy B.V.
Develops and operates utility-scale Long Duration Energy St…
|
CORRE | NL | Electricity, gas, steam and air… |
|
CPFL ENERGIA SA
Operates in electricity generation, transmission, distribut…
|
— | BR | Electricity, gas, steam and air… |
|
Crnogorski Elektroprenosni Sistem a.d. Podgorica
A national transmission system operator for the high-voltag…
|
PREN | ME | Electricity, gas, steam and air… |
|
CU Inc.
Alberta-based holding company operating regulated electric …
|
CU | CA | 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)"
Report missing filing
Can't find a specific document? Let us know and we'll add it within 24 hours.
We will notify you once the filing is added.
Report sent
Thank you. We will check the data and update it shortly.