Alliant Energy (LNT): financials, SEC filings and peers
Alliant Energy (LNT) is an electric utilities company in the Utilities sector of the S&P 500, headquartered in Madison, Wisconsin.
It was founded in 1917 and joined the S&P 500 on July 1, 2016.
Its fiscal year ends in December, and its shares trade on the Nasdaq.
In its SEC filings it is classified as “Electric & Other Services Combined”.
Alliant Energy at a glance
- Revenue (12 months)
- $4.4B
- Revenue growth
- +8.3%
- Operating margin
- 23.0%
- Net income (12 months)
- $821M
- Free cash flow (12 months)
- —
- Cash
- $115M
- Debt
- $11.4B
- Diluted EPS (12 months)
- $3.19
Twelve months to March 31, 2026, from the 10-Q filed May 1, 2026.
Latest twelve months
Over the twelve months to March 31, 2026, Alliant Energy reported revenue of $4.4 billion, up 8.3% from a year earlier.
Its operating margin was 23.0%: for every $100 of sales, about $23 was left as operating profit.
Net income was $821 million (18.6% of revenue), 10.2% higher than a year earlier.
At the end of the period it held $115 million in cash and $11.4 billion in debt, a net debt position of $11.3 billion.
Five-year trend
- Revenue went from $3.4 billion in fiscal 2020 to $4.4 billion in fiscal 2025, about 5.0% a year.
- Operating margin has been steady, around 23.5%.
- Free cash flow was negative in 3 of the last 3 fiscal years.
| Fiscal year | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|
| Revenue | $3.7B | $4.2B | $4.0B | $4.0B | $4.4B |
| Revenue growth | 7.4% | 14.6% | -4.2% | -1.1% | 9.6% |
| Operating margin | 21.7% | 22.1% | 23.4% | 22.3% | 23.5% |
| Net income | $674M | $686M | $703M | $690M | $810M |
| Free cash flow | −$587M | −$998M | — | — | — |
| Diluted EPS | $2.63 | $2.73 | $2.78 | $2.69 | $3.14 |
Fiscal years as reported in Alliant Energy’s 10-K filings. Free cash flow is operating cash flow minus capital spending.
Recent SEC filings
- 8-K filed August 21, 2026 — Other event
- 10-Q filed July 31, 2026 — quarterly report
- 8-K filed July 31, 2026 — Earnings results
- 8-K filed May 21, 2026 — Shareholder vote results
- 10-Q filed May 1, 2026 — quarterly report
- 8-K filed May 1, 2026 — Earnings results
- 8-K filed March 19, 2026 — Material agreement
- 8-K filed March 4, 2026 — Material agreement; New debt obligation
Companies like Alliant Energy
Other S&P 500 companies in Electric Utilities:
- AEPAmerican Electric PowerColumbus, Ohio
- CEGConstellation EnergyBaltimore, Maryland
- DUKDuke EnergyCharlotte, North Carolina
- EIXEdison InternationalRosemead, California
- ESEversource EnergyHartford, Connecticut
- ETREntergyNew Orleans, Louisiana
- EVRGEvergyKansas City, Missouri
- EXCExelonChicago, Illinois
More from Utilities
Questions about Alliant Energy
Is Alliant Energy's revenue growing?
Yes. Revenue for the twelve months to March 31, 2026 was $4.4 billion, up 8.3% from a year earlier, according to its SEC filings.
Is Alliant Energy profitable?
Yes. It earned $821 million in net income over the twelve months to March 31, 2026, a net margin of 18.6%.
Does Alliant Energy have more cash or more debt?
At March 31, 2026 it had $115 million in cash and $11.4 billion in debt, so more debt than cash.
When did Alliant Energy last file financial results?
Its latest quarterly report (10-Q) was filed with the SEC on July 31, 2026.
Which companies are similar to Alliant Energy?
In the S&P 500, Alliant Energy is grouped in Electric Utilities within the Utilities sector. American Electric Power (AEP), Constellation Energy (CEG), Duke Energy (DUK), Edison International (EIX), Eversource Energy (ES) are in the same group.
Understand the numbers
Source: Alliant Energy’s filings with the U.S. Securities and Exchange Commission (EDGAR), retrieved September 27, 2026. Figures are as reported by the company and may be restated. This page is for information only and is not financial advice.