AALLIANT ENERGY CORP logo

Company dossier

ALLIANT ENERGY CORP

Ticker LNTCIK 0000352541SIC 4931Electric & Other Services Combined

Exchange

Nasdaq

Entity type

operating

Fiscal year end

Dec 31

Headquarters

WI

Company overview

ALLIANT ENERGY CORP

Alliant Energy Corp, trading as LNT, is rooted in Electric & Other Services Combined, delivering regulated electricity and natural gas distribution alongside transmission investments for residential, commercial and municipal customers in Midwestern markets governed by SIC 4911 legacy standards. The firm’s core offerings span power generation from utility-scale coal, natural gas and renewable sources, grid modernization, and customer-centric efficiency programs, while its gas operations supply heating and industrial fuel needs with bundled reliability services. Its target customers include households, small businesses, industrial facilities and local governments reliant on consistent delivery, billing platforms, and energy advisory support. Regulatory oversight from state public utility commissions and the Federal Energy Regulatory Commission enforces cost recovery, rate structures and environmental compliance, creating material risks such as demand fluctuations, fuel price shocks, wildfire and storm exposure, plus evolving decarbonization mandates that pressure capital plans and peaking capacity additions. Disclosures reflect Form 10-Q filed Aug 1999, and CIK 352541 captures the historical archive; View live SEC filings on Earnings Feed.

Source: Earnings Feed research · last updated 11/24/2025

Last trade

$68.27

+$0.05 (+0.073%)

Ticker

LNT

Prev close

$68.22

Range (30d)

$66.47 – $68.97

Updated

Nov 21, 9:30 AM ET
$66.00$68.00$70.00Oct 22Oct 31Nov 12Nov 21

Recent filings

Latest submissions
9 items

Monitoring

Insider owner filings
Yes
Insider issuer filings
Yes
Tickers on record
1

Ticker roster

Addresses

  • business

    4902 NORTH BILTMORE LANE SUITE 1000

    MADISON, WI, 53718-2148

  • mailing

    4902 NORTH BILTMORE LANE SUITE 1000

    MADISON, WI, 53718-2148

Former names

  • ALLIANT ENERGY CORP

    1999-12-152025-11-07
  • INTERSTATE ENERGY CORP

    1998-05-271999-05-13
  • WPL HOLDINGS INC

    1994-11-141998-02-23