# Alliant Energy Corp: overview

LNT · Nasdaq · CIK 352541 · [Utilities](/sectors/utilities.md) · fiscal year ends Dec 31

Pages: [Overview](/companies/lnt.md) · [Financials](/companies/lnt/financials.md) · [Filings](/companies/lnt/filings.md) · [Insiders](/companies/lnt/insiders.md)

Latest reported revenue: [$1.18bn](/filings/0000352541-26-000033.md) for Q1 FY2026, three months to 2026-03-31, from the 10-Q filed May 1, 2026 (XBRL us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax, accession 0000352541-26-000033).

## Last eight quarters

| Line item | Unit | Q2 FY2024 (2024-06-30) | Q3 FY2024 (2024-09-30) | Q4 FY2024 (2024-12-31) | Q1 FY2025 (2025-03-31) | Q2 FY2025 (2025-06-30) | Q3 FY2025 (2025-09-30) | Q4 FY2025 (2025-12-31) | Q1 FY2026 (2026-03-31) |
| --- | --- | ---: | ---: | ---: | ---: | ---: | ---: | ---: | ---: |
| Revenue | $m | [894](/filings/0000352541-25-000072.md) | [1,081](/filings/0000352541-25-000081.md) | [976 d](/filings/0000352541-26-000007.md) | [1,128](/filings/0000352541-26-000033.md) | [961](/filings/0000352541-25-000072.md) | [1,210](/filings/0000352541-25-000081.md) | [1,064 d](/filings/0000352541-26-000007.md) | [1,184](/filings/0000352541-26-000033.md) |
| Gross margin | % | not reported | not reported | not reported | not reported | not reported | not reported | not reported | not reported |
| Operating margin | % | [14.5%](/filings/0000352541-25-000072.md) | [29.0%](/filings/0000352541-25-000081.md) | [22.6% d](/filings/0000352541-26-000007.md) | [22.8%](/filings/0000352541-26-000033.md) | [23.2%](/filings/0000352541-25-000072.md) | [28.8%](/filings/0000352541-25-000081.md) | [18.5% d](/filings/0000352541-26-000007.md) | [21.0%](/filings/0000352541-26-000033.md) |
| Net margin | % | [9.7%](/filings/0000352541-25-000072.md) | [27.3%](/filings/0000352541-25-000081.md) | [15.4% d](/filings/0000352541-26-000007.md) | [18.9%](/filings/0000352541-26-000033.md) | [18.1%](/filings/0000352541-25-000072.md) | [23.2%](/filings/0000352541-25-000081.md) | [13.3% d](/filings/0000352541-26-000007.md) | [18.9%](/filings/0000352541-26-000033.md) |
| Diluted EPS | $ per share | [0.34](/filings/0000352541-25-000072.md) | [1.15](/filings/0000352541-25-000081.md) | not reported | [0.83](/filings/0000352541-26-000033.md) | [0.68](/filings/0000352541-25-000072.md) | [1.09](/filings/0000352541-25-000081.md) | not reported | [0.87](/filings/0000352541-26-000033.md) |
| Free cash flow | $m | [(137) d](/filings/0000352541-25-000072.md) | [(59.0) d](/filings/0000352541-25-000081.md) | not reported | [(305)](/filings/0000352541-26-000033.md) | [(179) d](/filings/0000352541-25-000072.md) | [(103) d](/filings/0000352541-25-000081.md) | not reported | [26.0](/filings/0000352541-26-000033.md) |

- Revenue. XBRL Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. Derived values: 12-month figure less the 9-month figure.
- Gross margin (gross profit / revenue). XBRL Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. Derived values: 12-month figure less the 9-month figure.
- Operating margin (operating income / revenue). XBRL Operating income: us-gaap:OperatingIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. Derived values: 12-month figure less the 9-month figure.
- Net margin (net income / revenue). XBRL Net income: us-gaap:ProfitLoss; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax; Net income: us-gaap:NetIncomeLoss. Derived values: 12-month figure less the 9-month figure.
- Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted.
- Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities; Capital expenditure: us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. Derived values: 6-month figure less the 3-month figure; 9-month figure less the 6-month figure; 12-month figure less the 9-month figure.

## Last five fiscal years

| Line item | Unit | FY2021 (2021-12-31) | FY2022 (2022-12-31) | FY2023 (2023-12-31) | FY2024 (2024-12-31) | FY2025 (2025-12-31) |
| --- | --- | ---: | ---: | ---: | ---: | ---: |
| Revenue | $m | [3,669](/filings/0000352541-24-000014.md) | [4,205](/filings/0000352541-25-000014.md) | [4,027](/filings/0000352541-26-000007.md) | [3,981](/filings/0000352541-26-000007.md) | [4,362](/filings/0000352541-26-000007.md) |
| Gross margin | % | not reported | not reported | not reported | not reported | not reported |
| Operating margin | % | [21.7%](/filings/0000352541-24-000014.md) | [22.1%](/filings/0000352541-25-000014.md) | [23.4%](/filings/0000352541-26-000007.md) | [22.3%](/filings/0000352541-26-000007.md) | [23.5%](/filings/0000352541-26-000007.md) |
| Net margin | % | [18.4%](/filings/0000352541-24-000014.md) | [16.3%](/filings/0000352541-25-000014.md) | [17.5%](/filings/0000352541-26-000007.md) | [17.3%](/filings/0000352541-26-000007.md) | [18.6%](/filings/0000352541-26-000007.md) |
| Diluted EPS | $ per share | [2.63](/filings/0000352541-24-000014.md) | [2.73](/filings/0000352541-25-000014.md) | [2.78](/filings/0000352541-26-000007.md) | [2.69](/filings/0000352541-26-000007.md) | [3.14](/filings/0000352541-26-000007.md) |
| Free cash flow | $m | [(587)](/filings/0000352541-24-000014.md) | [(998)](/filings/0000352541-25-000014.md) | not reported | not reported | not reported |

- Revenue. XBRL Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Gross margin (gross profit / revenue). XBRL Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Operating margin (operating income / revenue). XBRL Operating income: us-gaap:OperatingIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Net margin (net income / revenue). XBRL Net income: us-gaap:NetIncomeLoss; Revenue: us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax.
- Diluted EPS. XBRL Diluted EPS: us-gaap:EarningsPerShareDiluted.
- Free cash flow (operating cash flow − capital expenditure). XBRL Operating cash flow: us-gaap:NetCashProvidedByUsedInOperatingActivities; Capital expenditure: us-gaap:PaymentsToAcquirePropertyPlantAndEquipment.

Each value links to the filing it came from. d marks a derived value. A ratio is not reported when any input is missing.

## Insider purchases and sales

The last 20 open-market transactions on Form 4 (codes P and S). Reported price is as stated on the form, not a market price. [All insider transactions](/companies/lnt/insiders.md)

None in coverage.

## Funds that report holding it

From each manager’s latest Form 13F, largest reported value first. Reported value is as filed: filing data, not a price. [All funds](/funds.md)

| Fund | Quarter ended | Reported value | Shares | Put or call | Change on the quarter before |
| --- | --- | ---: | ---: | --- | --- |
| [BlackRock, Inc.](/funds/2012383.md) | 2026-06-30 | $1.91bn | 24,986,672 |  | Added +487,232 |
| [STATE STREET CORP](/funds/93751.md) | 2026-06-30 | $1.34bn | 17,571,998 |  | Added +561,347 |
| [VANGUARD CAPITAL MANAGEMENT LLC](/funds/2100119.md) | 2026-06-30 | $1.29bn | 16,861,714 |  | Added +162,252 |
| [VANGUARD PORTFOLIO MANAGEMENT LLC](/funds/2100121.md) | 2026-06-30 | $1.10bn | 14,386,177 |  | Reduced −208,829 |
| [Jupiter Topco LLC](/funds/2146052.md) | 2026-06-30 | $837.5m | 10,977,426 |  | Not compared |
| [JANUS HENDERSON GROUP PLC](/funds/1274173.md) | 2026-03-31 | $809.0m | 11,273,621 |  | Not compared |
| [Nuveen, LLC](/funds/1871926.md) | 2026-06-30 | $602.0m | 7,890,946 |  | Added +450,560 |
| [GEODE CAPITAL MANAGEMENT, LLC](/funds/1214717.md) | 2026-06-30 | $563.0m | 7,407,445 |  | Added +149,419 |
| [MASSACHUSETTS FINANCIAL SERVICES CO /MA/](/funds/912938.md) | 2026-06-30 | $533.8m | 6,936,512 |  | Reduced −110,725 |
| [VICTORY CAPITAL MANAGEMENT INC](/funds/1040188.md) | 2026-06-30 | $491.5m | 6,442,409 |  | Reduced −796,455 |

## Recent filings

[All 1,647 filings](/companies/lnt/filings.md)

| Filed | Accepted | Form | What it is | Accession |
| --- | --- | --- | --- | --- |
| 2026-10-30 | 11:21 ET | [10-Q](/filings/0000352541-26-000047.md) | Quarterly report, period 2026-09-30 | 0000352541-26-000047 |
| 2026-10-30 | 18:06 ET | [8-K](/filings/0000352541-26-000045.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-26-000045 |
| 2026-10-28 | 08:15 ET | [8-K](/filings/0001193125-26-435177.md) | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0001193125-26-435177 |
| 2026-08-21 | 08:45 ET | [8-K](/filings/0001193125-26-360020.md) | 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-26-360020 |
| 2026-07-31 | 11:22 ET | [10-Q](/filings/0000352541-26-000043.md) | Quarterly report, period 2026-06-30 | 0000352541-26-000043 |
| 2026-07-31 | 18:02 ET | [8-K](/filings/0000352541-26-000042.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-26-000042 |
| 2026-05-21 | 17:05 ET | [8-K](/filings/0000352541-26-000036.md) | 5.07 Shareholder vote results | 0000352541-26-000036 |
| 2026-05-01 | 11:07 ET | [10-Q](/filings/0000352541-26-000033.md) | Quarterly report, period 2026-03-31 | 0000352541-26-000033 |
| 2026-05-01 | 18:23 ET | [8-K](/filings/0000352541-26-000030.md) | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-26-000030 |
| 2026-03-31 | 18:02 ET | [DEF 14A](/filings/0000352541-26-000025.md) | Proxy statement, period 2026-05-20 | 0000352541-26-000025 |

## Latest annual report

[Form 10-K for the fiscal year ended Dec 31, 2025](/filings/0000352541-26-000007.md), filed Feb 20, 2026.

## Forecast league

Not in this season’s league. [This season’s league](/leagues.md)

## About the filer

- CIK: 352541
- Tickers: LNT
- Exchange: Nasdaq
- SIC code: 4931 Electric & Other Services Combined
- State of incorporation: WI
- Filer category: Large accelerated filer

Source: SEC EDGAR, XBRL company facts, the filing index and Forms 4. Last ingested by Listed: Oct 30, 2026, 11:23 ET. No prices; not investment advice.