How many subsidiaries does ALLIANT ENERGY CORP file with the SEC?

2, listed in its most recent exhibit 21. They are incorporated across 2 jurisdictions (Iowa, Wisconsin). That exhibit is filed with the company's annual report and is the company's own list, not an estimate.

Is ALLIANT ENERGY CORP financially healthy?

ALLIANT ENERGY CORP scores 5 out of 8 on the Piotroski F-score. Only 8 of the nine tests could be computed from what it filed; the rest need a prior year it has not reported. Every test and the numbers behind it are shown above, so the arithmetic is checkable rather than something you have to take on trust.

Who are the largest institutional holders of ALLIANT ENERGY CORP?

Among the managers tracked here, the biggest positions as of the 2026-Q2 13F filings are BlackRock, Inc. (adding), STATE STREET CORP (adding), PRICE T ROWE ASSOCIATES INC /MD/ (adding). Direction is the change in share count against that manager's own previous filing; managers with no prior filing are left out rather than counted as new buyers.

ALLIANT ENERGY CORP (LNT)

Nasdaq · Common Stock · Electric & Other Services Combined

One email a week from me: what it filed, which 13F holders added or cut, where its scores stand. Free.

Corporate structure

2 entities across 2 jurisdictions. Read directly from the company’s own 10-K EX-21 filed 2026-02-20 — see the exhibit.

Which other public companies file entities in the same places:

Iowa1 Wisconsin1

Subsidiaries of ALLIANT ENERGY CORP as disclosed in its SEC filing
Entity	Jurisdiction	Note
Interstate Power and Light Company	Iowa
Wisconsin Power and Light Company	Wisconsin

Financial health

Two standard screens, computed from the XBRL in FY2025 against FY2024. Every test shows the numbers behind it — a score with its inputs hidden is a number you cannot check.

Piotroski F-score

5 / 8

PASSReturn on assets positiveROA 3.2%
PASSOperating cash flow positiveOCF 1.2B
PASSReturn on assets improving3.0% → 3.2%
PASSCash flow exceeds earningsOCF 1.2B vs NI 810M
FAILLong-term debt ratio falling38.2% → 43.8% of assets
PASSCurrent ratio improving0.44 → 0.80
FAILNo share dilution257M → 258M shares
FAILGross margin improvingno gross profit reported
FAILAsset turnover improving0.18× → 0.17×

Six-year record

Year	Revenue	Net income	Free cash flow	Gross margin	Shares
FY2020	$3.4B	$624.0M	−$865.0M	—	248,700,000
FY2021	$3.7B	$674.0M	−$587.0M	—	250,700,000
FY2022	$4.2B	$686.0M	−$998.0M	—	251,200,000
FY2023	$4.0B	$703.0M	—	—	253,300,000
FY2024	$4.0B	$690.0M	—	—	256,800,000
FY2025

Ownership flow

12 institutions tracked — 10 added, 2 reduced, 1 sold out.

Institutional holders of ALLIANT ENERGY CORP and their share-count change
Manager	Kind	Shares	Change	Value
FMR LLC	Active fund	5,043,741	+2,181,315	$384.8M
PRICE T ROWE ASSOCIATES INC /MD/	Active fund	11,515,298	+904,652	$878.5M
JPMORGAN CHASE & CO	Active fund	3,131,630	+881,253	$241.7M
Point72 Asset Management, L.P.	Hedge fund	2,094,866	+851,285	$159.8M

Capital returned

What the company actually paid out and bought back, as reported — the record behind any yield figure.

Dividend per share

2026Q1: $0.54
2025Q3: $0.51
2025Q2: $0.51
2025Q1: $0.51
2024Q3: $0.48
2024Q2: $0.48

Identity

CIK: 0000352541
FIGI: BBG000DW4Q75
SIC: 4931 · Electric & Other Services Combined
Incorporated: WI
Headquarters: MADISON, WI

Ownership

Institutional: 99.1%
Institutions: 1,163
Insiders: 0.2%

Ownership percentages are a vendor aggregate, not a filing — unlike everything else on this page.

Questions about ALLIANT ENERGY CORP

How many subsidiaries does ALLIANT ENERGY CORP file with the SEC?: 2, listed in its most recent exhibit 21. They are incorporated across 2 jurisdictions (Iowa, Wisconsin). That exhibit is filed with the company's annual report and is the company's own list, not an estimate.
Is ALLIANT ENERGY CORP financially healthy?: ALLIANT ENERGY CORP scores 5 out of 8 on the Piotroski F-score. Only 8 of the nine tests could be computed from what it filed; the rest need a prior year it has not reported. Every test and the numbers behind it are shown above, so the arithmetic is checkable rather than something you have to take on trust.
Who are the largest institutional holders of ALLIANT ENERGY CORP?: Among the managers tracked here, the biggest positions as of the 2026-Q2 13F filings are BlackRock, Inc. (adding), STATE STREET CORP (adding), PRICE T ROWE ASSOCIATES INC /MD/ (adding). Direction is the change in share count against that manager's own previous filing; managers with no prior filing are left out rather than counted as new buyers.

This page is one panel of the terminal

The structure map above is the Corporate Blueprint, and in the desktop it is interactive — click any entity to re-centre the map on it and walk the ownership chain. It sits alongside the screener, the scorecard and the filings lab on one desk, on your machine.

Download the terminal See pricing

Sourced from SEC EDGAR primary filings. Figures are as reported by the company and are not investment advice. Scores are standard published screens computed from those filings; every input is shown above so you can check the arithmetic.