Alliant Energy Corp
LNTNasdaqCIK 352541UtilitiesFiscal year ends Dec 31
Latest reported revenue, Q1 FY2026$1.18bnRevenue, Q1 FY2026, three months to 2026-03-31$1.18bn. XBRL concept
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Report this figureThree months to Mar 31, 2026, from the 10-Q filed May 1, 2026.Latest quarter: Q1 FY2026
Three months to Mar 31, 2026, against the same quarter a year earlier.
- Revenue$1.18bnRevenue, Q1 FY2026, three months to 2026-03-31$1.18bn. XBRL concept
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Report this figure+5.0% on a year earlier - Gross marginnot reported (Gross profit not reported)No year-earlier figure to compare
- Operating margin21.0%Operating margin, Q1 FY2026, three months to 2026-03-31. operating income / revenueOperating income: $249.0m. XBRL concept
us-gaap:OperatingIncomeLoss. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Revenue: $1.18bn. XBRL conceptus-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Report this figure−1.8 pts on a year earlier - Net margin18.9%Net margin, Q1 FY2026, three months to 2026-03-31. net income / revenueNet income: $224.0m. XBRL concept
us-gaap:NetIncomeLoss. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Revenue: $1.18bn. XBRL conceptus-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Report this figure+0.0 pts on a year earlier - Diluted EPS$0.87Diluted EPS, Q1 FY2026, three months to 2026-03-31$0.87 per share. XBRL concept
us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Report this figure+4.8% on a year earlier - Free cash flow$26.0mFree cash flow, Q1 FY2026, three months to 2026-03-31. operating cash flow − capital expenditureOperating cash flow: $368.0m. XBRL concept
us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Capital expenditure: $342.0m. XBRL conceptus-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Report this figureSign changed from a year earlier
Last eight quarters
Full statements| Line item | Unit | Q2 FY20242024-06-30 | Q3 FY20242024-09-30 | Q4 FY20242024-12-31 | Q1 FY20252025-03-31 | Q2 FY20252025-06-30 | Q3 FY20252025-09-30 | Q4 FY20252025-12-31 | Q1 FY20262026-03-31 | Shape over the periods |
|---|---|---|---|---|---|---|---|---|---|---|
| Revenue | $m | 894Revenue, Q2 FY2024, three months to 2024-06-30$894.0m. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2025-08-08, accession 0000352541-25-000072.Report this figure | 1,081Revenue, Q3 FY2024, three months to 2024-09-30$1.08bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2025-11-07, accession 0000352541-25-000081.Report this figure | 976Revenue, Q4 FY2024, three months to 2024-12-31$976.0m. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2026-02-20, accession 0000352541-26-000007. Derived: 12-month figure less the 9-month figure.Report this figure | 1,128Revenue, Q1 FY2025, three months to 2025-03-31$1.13bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Report this figure | 961Revenue, Q2 FY2025, three months to 2025-06-30$961.0m. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2025-08-08, accession 0000352541-25-000072.Report this figure | 1,210Revenue, Q3 FY2025, three months to 2025-09-30$1.21bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2025-11-07, accession 0000352541-25-000081.Report this figure | 1,064Revenue, Q4 FY2025, three months to 2025-12-31$1.06bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2026-02-20, accession 0000352541-26-000007. Derived: 12-month figure less the 9-month figure.Report this figure | 1,184Revenue, Q1 FY2026, three months to 2026-03-31$1.18bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Report this figure | |
| Gross margin | % | not reported (Gross profit not reported) | not reported (Gross profit not reported) | not reported (Gross profit not reported) | not reported (Gross profit not reported) | not reported (Gross profit not reported) | not reported (Gross profit not reported) | not reported (Gross profit not reported) | not reported (Gross profit not reported) | |
| Operating margin | % | 14.5%Operating margin, Q2 FY2024, three months to 2024-06-30. operating income / revenueOperating income: $130.0m. XBRL concept us-gaap:OperatingIncomeLoss. 10-Q filed 2025-08-08, accession 0000352541-25-000072.Revenue: $894.0m. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2025-08-08, accession 0000352541-25-000072.Report this figure | 29.0%Operating margin, Q3 FY2024, three months to 2024-09-30. operating income / revenueOperating income: $313.0m. XBRL concept us-gaap:OperatingIncomeLoss. 10-Q filed 2025-11-07, accession 0000352541-25-000081.Revenue: $1.08bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2025-11-07, accession 0000352541-25-000081.Report this figure | 22.6%Operating margin, Q4 FY2024, three months to 2024-12-31. operating income / revenueOperating income: $221.0m. XBRL concept us-gaap:OperatingIncomeLoss. 10-K filed 2026-02-20, accession 0000352541-26-000007. Derived: 12-month figure less the 9-month figure.Revenue: $976.0m. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2026-02-20, accession 0000352541-26-000007. Derived: 12-month figure less the 9-month figure.Report this figure | 22.8%Operating margin, Q1 FY2025, three months to 2025-03-31. operating income / revenueOperating income: $257.0m. XBRL concept us-gaap:OperatingIncomeLoss. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Revenue: $1.13bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Report this figure | 23.2%Operating margin, Q2 FY2025, three months to 2025-06-30. operating income / revenueOperating income: $223.0m. XBRL concept us-gaap:OperatingIncomeLoss. 10-Q filed 2025-08-08, accession 0000352541-25-000072.Revenue: $961.0m. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2025-08-08, accession 0000352541-25-000072.Report this figure | 28.8%Operating margin, Q3 FY2025, three months to 2025-09-30. operating income / revenueOperating income: $349.0m. XBRL concept us-gaap:OperatingIncomeLoss. 10-Q filed 2025-11-07, accession 0000352541-25-000081.Revenue: $1.21bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2025-11-07, accession 0000352541-25-000081.Report this figure | 18.5%Operating margin, Q4 FY2025, three months to 2025-12-31. operating income / revenueOperating income: $197.0m. XBRL concept us-gaap:OperatingIncomeLoss. 10-K filed 2026-02-20, accession 0000352541-26-000007. Derived: 12-month figure less the 9-month figure.Revenue: $1.06bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2026-02-20, accession 0000352541-26-000007. Derived: 12-month figure less the 9-month figure.Report this figure | 21.0%Operating margin, Q1 FY2026, three months to 2026-03-31. operating income / revenueOperating income: $249.0m. XBRL concept us-gaap:OperatingIncomeLoss. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Revenue: $1.18bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Report this figure | |
| Net margin | % | 9.7%Net margin, Q2 FY2024, three months to 2024-06-30. net income / revenueNet income: $87.0m. XBRL concept us-gaap:ProfitLoss. 10-Q filed 2025-08-08, accession 0000352541-25-000072.Revenue: $894.0m. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2025-08-08, accession 0000352541-25-000072.Report this figure | 27.3%Net margin, Q3 FY2024, three months to 2024-09-30. net income / revenueNet income: $295.0m. XBRL concept us-gaap:ProfitLoss. 10-Q filed 2025-11-07, accession 0000352541-25-000081.Revenue: $1.08bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2025-11-07, accession 0000352541-25-000081.Report this figure | 15.4%Net margin, Q4 FY2024, three months to 2024-12-31. net income / revenueNet income: $150.0m. XBRL concept us-gaap:NetIncomeLoss. 10-K filed 2026-02-20, accession 0000352541-26-000007. Derived: 12-month figure less the 9-month figure.Revenue: $976.0m. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2026-02-20, accession 0000352541-26-000007. Derived: 12-month figure less the 9-month figure.Report this figure | 18.9%Net margin, Q1 FY2025, three months to 2025-03-31. net income / revenueNet income: $213.0m. XBRL concept us-gaap:NetIncomeLoss. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Revenue: $1.13bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Report this figure | 18.1%Net margin, Q2 FY2025, three months to 2025-06-30. net income / revenueNet income: $174.0m. XBRL concept us-gaap:ProfitLoss. 10-Q filed 2025-08-08, accession 0000352541-25-000072.Revenue: $961.0m. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2025-08-08, accession 0000352541-25-000072.Report this figure | 23.2%Net margin, Q3 FY2025, three months to 2025-09-30. net income / revenueNet income: $281.0m. XBRL concept us-gaap:ProfitLoss. 10-Q filed 2025-11-07, accession 0000352541-25-000081.Revenue: $1.21bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2025-11-07, accession 0000352541-25-000081.Report this figure | 13.3%Net margin, Q4 FY2025, three months to 2025-12-31. net income / revenueNet income: $142.0m. XBRL concept us-gaap:NetIncomeLoss. 10-K filed 2026-02-20, accession 0000352541-26-000007. Derived: 12-month figure less the 9-month figure.Revenue: $1.06bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2026-02-20, accession 0000352541-26-000007. Derived: 12-month figure less the 9-month figure.Report this figure | 18.9%Net margin, Q1 FY2026, three months to 2026-03-31. net income / revenueNet income: $224.0m. XBRL concept us-gaap:NetIncomeLoss. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Revenue: $1.18bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Report this figure | |
| Diluted EPS | $ per share | 0.34Diluted EPS, Q2 FY2024, three months to 2024-06-30$0.34 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2025-08-08, accession 0000352541-25-000072.Report this figure | 1.15Diluted EPS, Q3 FY2024, three months to 2024-09-30$1.15 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2025-11-07, accession 0000352541-25-000081.Report this figure | not reported (Diluted EPS not reported) | 0.83Diluted EPS, Q1 FY2025, three months to 2025-03-31$0.83 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Report this figure | 0.68Diluted EPS, Q2 FY2025, three months to 2025-06-30$0.68 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2025-08-08, accession 0000352541-25-000072.Report this figure | 1.09Diluted EPS, Q3 FY2025, three months to 2025-09-30$1.09 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2025-11-07, accession 0000352541-25-000081.Report this figure | not reported (Diluted EPS not reported) | 0.87Diluted EPS, Q1 FY2026, three months to 2026-03-31$0.87 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Report this figure | |
| Free cash flow | $m | (137)Free cash flow, Q2 FY2024, three months to 2024-06-30. operating cash flow − capital expenditureOperating cash flow: $255.0m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2025-08-08, accession 0000352541-25-000072. Derived: 6-month figure less the 3-month figure.Capital expenditure: $392.0m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2025-08-08, accession 0000352541-25-000072. Derived: 6-month figure less the 3-month figure.Report this figure | (59.0)Free cash flow, Q3 FY2024, three months to 2024-09-30. operating cash flow − capital expenditureOperating cash flow: $351.0m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2025-11-07, accession 0000352541-25-000081. Derived: 9-month figure less the 6-month figure.Capital expenditure: $410.0m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2025-11-07, accession 0000352541-25-000081. Derived: 9-month figure less the 6-month figure.Report this figure | not reported (Capital expenditure not reported) | (305)Free cash flow, Q1 FY2025, three months to 2025-03-31. operating cash flow − capital expenditureOperating cash flow: $249.0m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Capital expenditure: $554.0m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Report this figure | (179)Free cash flow, Q2 FY2025, three months to 2025-06-30. operating cash flow − capital expenditureOperating cash flow: $243.0m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2025-08-08, accession 0000352541-25-000072. Derived: 6-month figure less the 3-month figure.Capital expenditure: $422.0m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2025-08-08, accession 0000352541-25-000072. Derived: 6-month figure less the 3-month figure.Report this figure | (103)Free cash flow, Q3 FY2025, three months to 2025-09-30. operating cash flow − capital expenditureOperating cash flow: $408.0m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2025-11-07, accession 0000352541-25-000081. Derived: 9-month figure less the 6-month figure.Capital expenditure: $511.0m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2025-11-07, accession 0000352541-25-000081. Derived: 9-month figure less the 6-month figure.Report this figure | not reported (Capital expenditure not reported) | 26.0Free cash flow, Q1 FY2026, three months to 2026-03-31. operating cash flow − capital expenditureOperating cash flow: $368.0m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Capital expenditure: $342.0m. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-Q filed 2026-05-01, accession 0000352541-26-000033.Report this figure |
Focus or hover a figure to see its XBRL concept, period and filing; each links to that filing. A figure marked d is derived: a quarter computed from year-to-date figures, such as the fourth quarter as the fiscal year less the nine months before it. A ratio reads not reported when any input is missing.
Last five fiscal years
| Line item | Unit | FY20212021-12-31 | FY20222022-12-31 | FY20232023-12-31 | FY20242024-12-31 | FY20252025-12-31 | Shape over the periods |
|---|---|---|---|---|---|---|---|
| Revenue | $m | 3,669Revenue, FY2021, twelve months to 2021-12-31$3.67bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2024-02-16, accession 0000352541-24-000014.Report this figure | 4,205Revenue, FY2022, twelve months to 2022-12-31$4.21bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-02-21, accession 0000352541-25-000014.Report this figure | 4,027Revenue, FY2023, twelve months to 2023-12-31$4.03bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2026-02-20, accession 0000352541-26-000007.Report this figure | 3,981Revenue, FY2024, twelve months to 2024-12-31$3.98bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2026-02-20, accession 0000352541-26-000007.Report this figure | 4,362Revenue, FY2025, twelve months to 2025-12-31$4.36bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2026-02-20, accession 0000352541-26-000007.Report this figure | |
| Gross margin | % | not reported (Gross profit not reported) | not reported (Gross profit not reported) | not reported (Gross profit not reported) | not reported (Gross profit not reported) | not reported (Gross profit not reported) | |
| Operating margin | % | 21.7%Operating margin, FY2021, twelve months to 2021-12-31. operating income / revenueOperating income: $795.0m. XBRL concept us-gaap:OperatingIncomeLoss. 10-K filed 2024-02-16, accession 0000352541-24-000014.Revenue: $3.67bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2024-02-16, accession 0000352541-24-000014.Report this figure | 22.1%Operating margin, FY2022, twelve months to 2022-12-31. operating income / revenueOperating income: $928.0m. XBRL concept us-gaap:OperatingIncomeLoss. 10-K filed 2025-02-21, accession 0000352541-25-000014.Revenue: $4.21bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-02-21, accession 0000352541-25-000014.Report this figure | 23.4%Operating margin, FY2023, twelve months to 2023-12-31. operating income / revenueOperating income: $943.0m. XBRL concept us-gaap:OperatingIncomeLoss. 10-K filed 2026-02-20, accession 0000352541-26-000007.Revenue: $4.03bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2026-02-20, accession 0000352541-26-000007.Report this figure | 22.3%Operating margin, FY2024, twelve months to 2024-12-31. operating income / revenueOperating income: $886.0m. XBRL concept us-gaap:OperatingIncomeLoss. 10-K filed 2026-02-20, accession 0000352541-26-000007.Revenue: $3.98bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2026-02-20, accession 0000352541-26-000007.Report this figure | 23.5%Operating margin, FY2025, twelve months to 2025-12-31. operating income / revenueOperating income: $1.02bn. XBRL concept us-gaap:OperatingIncomeLoss. 10-K filed 2026-02-20, accession 0000352541-26-000007.Revenue: $4.36bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2026-02-20, accession 0000352541-26-000007.Report this figure | |
| Net margin | % | 18.4%Net margin, FY2021, twelve months to 2021-12-31. net income / revenueNet income: $674.0m. XBRL concept us-gaap:NetIncomeLoss. 10-K filed 2024-02-16, accession 0000352541-24-000014.Revenue: $3.67bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2024-02-16, accession 0000352541-24-000014.Report this figure | 16.3%Net margin, FY2022, twelve months to 2022-12-31. net income / revenueNet income: $686.0m. XBRL concept us-gaap:NetIncomeLoss. 10-K filed 2025-02-21, accession 0000352541-25-000014.Revenue: $4.21bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2025-02-21, accession 0000352541-25-000014.Report this figure | 17.5%Net margin, FY2023, twelve months to 2023-12-31. net income / revenueNet income: $703.0m. XBRL concept us-gaap:NetIncomeLoss. 10-K filed 2026-02-20, accession 0000352541-26-000007.Revenue: $4.03bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2026-02-20, accession 0000352541-26-000007.Report this figure | 17.3%Net margin, FY2024, twelve months to 2024-12-31. net income / revenueNet income: $690.0m. XBRL concept us-gaap:NetIncomeLoss. 10-K filed 2026-02-20, accession 0000352541-26-000007.Revenue: $3.98bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2026-02-20, accession 0000352541-26-000007.Report this figure | 18.6%Net margin, FY2025, twelve months to 2025-12-31. net income / revenueNet income: $810.0m. XBRL concept us-gaap:NetIncomeLoss. 10-K filed 2026-02-20, accession 0000352541-26-000007.Revenue: $4.36bn. XBRL concept us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax. 10-K filed 2026-02-20, accession 0000352541-26-000007.Report this figure | |
| Diluted EPS | $ per share | 2.63Diluted EPS, FY2021, twelve months to 2021-12-31$2.63 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2024-02-16, accession 0000352541-24-000014.Report this figure | 2.73Diluted EPS, FY2022, twelve months to 2022-12-31$2.73 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2025-02-21, accession 0000352541-25-000014.Report this figure | 2.78Diluted EPS, FY2023, twelve months to 2023-12-31$2.78 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2026-02-20, accession 0000352541-26-000007.Report this figure | 2.69Diluted EPS, FY2024, twelve months to 2024-12-31$2.69 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2026-02-20, accession 0000352541-26-000007.Report this figure | 3.14Diluted EPS, FY2025, twelve months to 2025-12-31$3.14 per share. XBRL concept us-gaap:EarningsPerShareDiluted. 10-K filed 2026-02-20, accession 0000352541-26-000007.Report this figure | |
| Free cash flow | $m | (587)Free cash flow, FY2021, twelve months to 2021-12-31. operating cash flow − capital expenditureOperating cash flow: $582.0m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-K filed 2024-02-16, accession 0000352541-24-000014.Capital expenditure: $1.17bn. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-K filed 2023-02-24, accession 0000352541-23-000017.Report this figure | (998)Free cash flow, FY2022, twelve months to 2022-12-31. operating cash flow − capital expenditureOperating cash flow: $486.0m. XBRL concept us-gaap:NetCashProvidedByUsedInOperatingActivities. 10-K filed 2025-02-21, accession 0000352541-25-000014.Capital expenditure: $1.48bn. XBRL concept us-gaap:PaymentsToAcquirePropertyPlantAndEquipment. 10-K filed 2023-02-24, accession 0000352541-23-000017.Report this figure | not reported (Capital expenditure not reported) | not reported (Capital expenditure not reported) | not reported (Capital expenditure not reported) |
Focus or hover a figure to see its XBRL concept, period and filing; each links to that filing. A figure marked d is derived: a quarter computed from year-to-date figures, such as the fourth quarter as the fiscal year less the nine months before it. A ratio reads not reported when any input is missing.
Insider purchases and sales
All insider transactionsThe last 20 open-market transactions reported on Form 4 (codes P and S). The reported price is the price per share the insider stated on the form: filing data, not a market price.
No open-market purchases or sales by insiders are in coverage from Nov 2024 to Oct 2026.
No open-market purchases or sales by insiders are in coverage for this company.
Funds that report holding it
All fundsFrom each manager's latest Form 13F, largest reported value first. Reported value is as filed at the quarter end: filing data, not a price. A put or call is an option position, not shares held.
| Fund | Quarter ended | Reported value | Shares | Put or call | Change on the quarter before |
|---|---|---|---|---|---|
| BlackRock, Inc. | 2026-06-30 | $1.91bn | 24,986,672 | Added+487,232 | |
| STATE STREET CORP | 2026-06-30 | $1.34bn | 17,571,998 | Added+561,347 | |
| VANGUARD CAPITAL MANAGEMENT LLC | 2026-06-30 | $1.29bn | 16,861,714 | Added+162,252 | |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 2026-06-30 | $1.10bn | 14,386,177 | Reduced−208,829 | |
| Jupiter Topco LLC | 2026-06-30 | $837.5m | 10,977,426 | Not compared | |
| JANUS HENDERSON GROUP PLC | 2026-03-31 | $809.0m | 11,273,621 | Not compared | |
| Nuveen, LLC | 2026-06-30 | $602.0m | 7,890,946 | Added+450,560 | |
| GEODE CAPITAL MANAGEMENT, LLC | 2026-06-30 | $563.0m | 7,407,445 | Added+149,419 | |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 2026-06-30 | $533.8m | 6,936,512 | Reduced−110,725 | |
| VICTORY CAPITAL MANAGEMENT INC | 2026-06-30 | $491.5m | 6,442,409 | Reduced−796,455 |
Recent filings
All 1,647 filingsReports and events: 10-K, 10-Q, 8-K, proxy statements and ownership schedules.
| Filed | Form | What it is | Accession number |
|---|---|---|---|
| 2026-10-3011:21 ET | 10-Q | Quarterly reportPeriod 2026-09-30 | 0000352541-26-000047 |
| 2026-10-3018:06 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-26-000045 |
| 2026-10-2808:15 ET | 8-K | 1.01 Entry into a material agreement; 2.03 New direct financial obligation; 9.01 Financial statements and exhibits | 0001193125-26-435177 |
| 2026-08-2108:45 ET | 8-K | 8.01 Other events; 9.01 Financial statements and exhibits | 0001193125-26-360020 |
| 2026-07-3111:22 ET | 10-Q | Quarterly reportPeriod 2026-06-30 | 0000352541-26-000043 |
| 2026-07-3118:02 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-26-000042 |
| 2026-05-2117:05 ET | 8-K | 5.07 Shareholder vote results | 0000352541-26-000036 |
| 2026-05-0111:07 ET | 10-Q | Quarterly reportPeriod 2026-03-31 | 0000352541-26-000033 |
| 2026-05-0118:23 ET | 8-K | 2.02 Results of operations; 9.01 Financial statements and exhibits | 0000352541-26-000030 |
| 2026-03-3118:02 ET | DEF 14A | Proxy statementPeriod 2026-05-20 | 0000352541-26-000025 |
Latest annual report
Form 10-K for the fiscal year ended Dec 31, 2025Filed Feb 20, 2026. Its page lists the documents and the extracted sections, such as Business and Risk factors.
Forecast league
Not in this season’s league. The league lists companies whose quarter has ended and whose results are not yet filed.This season’s league
About the filer
- CIK
- 352541
- Tickers
- LNT
- Exchange
- Nasdaq
- SIC code
- 4931 Electric & Other Services Combined
- Sector
- Utilities
- Fiscal year ends
- Dec 31
- Incorporated in
- WI
- Filer category
- Large accelerated filer
- Former names
- ALLIANT ENERGY CORP (to 2026-10-30); INTERSTATE ENERGY CORP (to 1999-05-13); WPL HOLDINGS INC (to 1998-02-23)
Source: SEC EDGAR, XBRL company facts, the filing index and Forms 4. Last ingested by Listed: Oct 30, 2026, 11:23 ET. Listed shows no prices and gives no investment advice.