Company · LNT · CIK 352541

Alliant Energy Corp (LNT) SEC filings and CIK.

LNT’s SEC Central Index Key (CIK) is 0000352541, or 352541 without leading zeros. The SEC’s ticker file lists it as ALLIANT ENERGY CORP.

Ticker: LNT
CIK: 0000352541
Other tickers: None
Insider transactions, Q3 2026: 1

Insider trading

In Q3 2026, insiders at Alliant Energy Corp reported 1 non-derivative transactions on 9 Forms 3, 4 and 5, including 0 open-market purchases and 1 sales.

Recent filings we observed

From our record of EDGAR’s latest-filings feed and sampled daily indexes. Not a complete filing history; use the filings API for that.
Filed	Form	Accession
2026-11-06	S-3ASR	0000352541-26-000053
2026-10-30	8-K	0000352541-26-000045
2026-10-30	10-Q	0000352541-26-000047

Get LNT SEC data through the API

Filing history

curl "https://sec-api.dev/api/v1/filings?cik=352541&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Company profile

curl "https://sec-api.dev/api/v1/companies/352541" \
  -H "Authorization: Bearer $SEC_API_KEY"

Reported XBRL facts

curl "https://sec-api.dev/api/v1/facts/352541?taxonomy=us-gaap&concept=Revenues&limit=10" \
  -H "Authorization: Bearer $SEC_API_KEY"

Ticker to CIK API · SEC filings API · Alliant Energy Corp on SEC.gov

Questions

What is LNT’s CIK number?

LNT’s SEC Central Index Key (CIK) is 0000352541, or 352541 without leading zeros. The SEC’s ticker file lists it as ALLIANT ENERGY CORP.

How do I find Alliant Energy Corp’s 10-K?

Request /api/v1/filings?cik=352541&form=10-K, or open the company’s EDGAR page and filter by 10-K. Foreign issuers file 20-F or 40-F instead.

Ticker and CIK: SEC company_tickers.json, cached 2026-11-02. Tickers can move between entities; the CIK identifies the filer.

Plain-text version for agents and LLMs: /companies/lnt.md

Independent. Not affiliated with, endorsed by, or sponsored by the U.S. Securities and Exchange Commission. Data is reproduced from public SEC filings and datasets. Not investment advice.