Alliant Energy (FRA:AY1) Long-Term Debt: €9,521 Mil (As of Mar. 2026)

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FRA:AY1 Alliant Energy Corp FRA:AY1
78 GF Score
Price €65.58
GF Value €57.67
Valuation Modestly Overvalued
! 10 Warning Signs
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What is Alliant Energy Long-Term Debt?

Alliant Energy FRA:AY1 -0.65% 78 Long-Term Debt is €9,521 Mil as of Mar. 2026. GuruFocus rates FRA:AY1 with a GF Score™ of 78/100 and a GF Value™ of €57.67 (Modestly Overvalued). The stock has 10 warning signs investors should review.

Alliant Energy's Long-Term Debt for the quarter that ended in Mar. 2026 was €9,521 Mil.

Alliant Energy's quarterly Long-Term Debt increased from Sep. 2025 (€9,078 Mil) to Dec. 2025 (€9,355 Mil) and increased from Dec. 2025 (€9,355 Mil) to Mar. 2026 (€9,521 Mil).

Alliant Energy's annual Long-Term Debt increased from Dec. 2023 (€7,542 Mil) to Dec. 2024 (€8,287 Mil) and increased from Dec. 2024 (€8,287 Mil) to Dec. 2025 (€9,355 Mil).

Alliant Energy  (FRA:AY1) Long-Term Debt Explanation

Long-Term Debt is the sum of the carrying values as of the balance sheet date of all long-term debt, which is debt initially having maturities due after one year or beyond the operating cycle, if longer, but excluding the portions thereof scheduled to be repaid within one year or the normal operating cycle, if longer. Long-Term Debt includes notes payable, bonds payable, mortgage loans, convertible debt, subordinated debt and other types of long term debt.

Alliant Energy Long-Term Debt Related Terms

Alliant Energy Long-Term Debt Historical Data

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The historical data trend for Alliant Energy's Long-Term Debt can be seen below:

* For Operating Data section: All numbers are indicated by the unit behind each term and all currency related amount are in USD.
* For other sections: All numbers are in millions except for per share data, ratio, and percentage. All currency related amount are indicated in the company's associated stock exchange currency.

Alliant Energy Long-Term Debt Chart

Alliant Energy Annual Data
Trend Dec16 Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Long-Term Debt
Get a 7-Day Free Trial Premium Member Only Premium Member Only 5,960.48 7,238.59 7,542.33 8,286.54 9,354.72

Alliant Energy Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
Long-Term Debt Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only Premium Member Only 7,936.50 8,359.61 9,078.06 9,354.72 9,521.06
FRA:AY1
78GF Score
Alliant Energy Corp FRA:AY1
Long-Term Debt is just one metric. See GF Score™, valuation, warning signs, and more.
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Frequently Asked Questions Learn more about Long-Term Debt →
What does a Long-Term Debt of €9,521 Mil mean?
Alliant Energy (FRA:AY1) has a Long-Term Debt of €9,521 Mil as of Mar. 2026.
Is Alliant Energy's Long-Term Debt too high?
Alliant Energy's current Long-Term Debt is €9,521 Mil. Overall, Alliant Energy has a GF Score™ of 78/100 and is considered Modestly Overvalued, reflecting its overall financial health beyond just this single metric.
How does Alliant Energy's Long-Term Debt compare to EVRG and CMS?
Alliant Energy's Long-Term Debt of €9,521 Mil can be compared against companies in the Utilities - Regulated industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Long-Term Debt for an Utilities - Regulated company?
A good Long-Term Debt depends on the Utilities - Regulated industry context. However, Long-Term Debt should not be evaluated in isolation — investors should consider it alongside profitability, growth, and financial strength metrics. Use the industry distribution chart on this page to see where any company falls relative to its peers.
What does a high Long-Term Debt mean?
A high Long-Term Debt can signal that a stock is expensive relative to its fundamentals. Alliant Energy's current Long-Term Debt is €9,521 Mil. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Alliant Energy stock overvalued right now?
Based on GuruFocus' analysis, Alliant Energy (FRA:AY1) is currently considered Modestly Overvalued. The stock's GF Value™ is €57.67, compared to a current price of €65.58 — trading 13.7% above its estimated fair value. The current Long-Term Debt is €9,521 Mil. Alliant Energy's overall GF Score™ is 78/100 with 10 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Long-Term Debt calculated?
Long-Term Debt is calculated from a company's financial statements. For Alliant Energy (FRA:AY1), the current Long-Term Debt is €9,521 Mil as of Mar. 2026. GuruFocus calculates this using data sourced from SEC filings and annual reports. See the calculation section and 30-year financial data on this page for the full breakdown.

Is Alliant Energy (FRA:AY1) Overvalued in 2026?

Based on GuruFocus' analysis, Alliant Energy stock appears to be overvalued. The current stock price of €65.58 is trading 13.7% above its estimated GF Value™ of €57.67. GuruFocus considers Alliant Energy to be Modestly Overvalued.

Key valuation signals for FRA:AY1:

  • Long-Term Debt: €9,521 Mil
  • GF Value™: €57.67 vs. price of €65.58 (13.7% above fair value)
  • GF Score™: 78/100 with 10 warning signs

No single metric tells the full story. See the FRA:AY1 stock analysis page for a complete view including 30-year financials, guru trades, and insider activity.

Alliant Energy Business Description

Other Exchanges LNT:USA0HCT:UKAY1:Germany
Address 4902 North Biltmore Lane, Madison, WI, USA, 53718
Alliant Energy is the parent of two regulated utilities, Interstate Power and Light and Wisconsin Power and Light. Together, IPL and WPL serve nearly 1 million electric customers and 425,000 natural gas-only customers. Both subsidiaries engage in the generation and distribution of electricity and the distribution and transportation of natural gas. Alliant also owns a 16% interest in American Transmission.
78GF Score

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Long-Term Debt is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€65.58
Price
€57.67
GF Value