Theon International (STU:W8C) Effective Interest Rate on Debt %: 11.09% (As of Dec. 2025)

Author: Vera Yuan Vera Yuan
Vera Yuan
Vera Yuan
Director of Data and Quant Analytics at GuruFocus
Focused on building reliable datasets, financial models, and research tools for value-minded investors. Committed to turning complex data into practical guidance for value-investing and long-term wealth.
Reviewed by: Charlie Tian Charlie Tian
Charlie Tian
Charlie Tian
Founder & CEO of GuruFocus
Dr. Charlie Tian is the founder and CEO of GuruFocus.com, a leading global investment research platform established in 2004. With a Ph.D. in physics, Dr. Tian transitioned from science to finance, applying a data-driven, disciplined approach to value investing.

STU:W8C Theon International PLC STU:W8C
47 GF Score
Price €34.80
! 4 Warning Signs
View Full Analysis

What is Theon International Effective Interest Rate on Debt %?

Theon International STU:W8C +1.99% 47 Effective Interest Rate on Debt % is 11.09% as of Dec. 2025. GuruFocus rates STU:W8C with a GF Score™ of 47/100. The stock has 4 warning signs investors should review.

Effective Interest Rate on Debt % is the usage rate that a borrower actually pays on a debt. It is calculated as the positive value of Interest Expense divided by its average total debt. Total debt equals to Long-Term Debt & Capital Lease Obligation plus Short-Term Debt & Capital Lease Obligation. Theon International's annualized positive value of Interest Expense for the quarter that ended in Dec. 2025 was €12.4 Mil. Theon International's average total debt for the quarter that ended in Dec. 2025 was €111.8 Mil. Therefore, Theon International's annualized Effective Interest Rate on Debt % for the quarter that ended in Dec. 2025 was 11.09%.


Theon International  (STU:W8C) Effective Interest Rate on Debt % Explanation

Effective Interest Rate on Debt % measures the usage rate that a borrower actually pays on a debt.


Theon International Effective Interest Rate on Debt % Related Terms


Theon International Effective Interest Rate on Debt % Historical Data

* Premium members only.

The historical data trend for Theon International's Effective Interest Rate on 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.

Theon International Effective Interest Rate on Debt % Chart

Theon International Annual Data
Trend Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Effective Interest Rate on Debt %
Get a 7-Day Free Trial 2.58 3.17 6.59 6.80 8.43

Theon International Semi-Annual Data
Dec20 Jun21 Dec21 Jun22 Dec22 Jun23 Dec23 Jun24 Dec24 Jun25 Dec25
Effective Interest Rate on Debt % Get a 7-Day Free Trial Premium Member Only Premium Member Only Premium Member Only 7.15 7.00 6.97 5.85 11.09

STU:W8C vs SPCX, GE, RTX: Effective Interest Rate on Debt % Comparison

For the Aerospace & Defense subindustry, Theon International's Effective Interest Rate on Debt %, along with its competitors' market caps and Effective Interest Rate on Debt % data, can be viewed below:

* Competitive companies are chosen from companies within the same industry, with headquarter located in same country, with closest market capitalization; x-axis shows the market cap, and y-axis shows the term value; the bigger the dot, the larger the market cap. Note that "N/A" values will not show up in the chart.


Theon International Effective Interest Rate on Debt % vs Aerospace & Defense Industry

For the Aerospace & Defense industry and Industrials sector, Theon International's Effective Interest Rate on Debt % distribution charts can be found below:

* The bar in red indicates where Theon International's Effective Interest Rate on Debt % falls into.


STU:W8C
47GF Score
Theon International PLC STU:W8C
Effective Interest Rate on Debt % is just one metric. See GF Score™, valuation, warning signs, and more.
View Full Analysis

Theon International Effective Interest Rate on Debt % Calculation

Theon International's annualized Effective Interest Rate on Debt % for the fiscal year that ended in Dec. 2025 is calculated as

Effective Interest Rate on Debt %
=-1  *  Interest Expense/( (Total Debt  (A: Dec. 2024 )+Total Debt  (A: Dec. 2025 ))/ count )
=-1  *  -8.683/( (76.094+129.959)/ 2 )
=-1  *  -8.683/103.0265
=8.43 %

where

Total Debt  (A: Dec. 2024 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=47.301 + 28.793
=76.094

Total Debt  (A: Dec. 2025 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=122.938 + 7.021
=129.959

Theon International's annualized Effective Interest Rate on Debt % for the quarter that ended in Dec. 2025 is calculated as

Effective Interest Rate on Debt %
=-1  *  Interest Expense/( (Total Debt  (Q: Jun. 2025 )+Total Debt  (Q: Dec. 2025 ))/ count )
=-1  *  -12.404/( (93.638+129.959)/ 2 )
=-1  *  -12.404/111.7985
=11.09 %

where

Total Debt  (Q: Jun. 2025 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=67.029 + 26.609
=93.638

Total Debt  (Q: Dec. 2025 )
=Long-Term Debt & Capital Lease Obligation + Short-Term Debt & Capital Lease Obligation
=122.938 + 7.021
=129.959

* 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.

In the calculation of annual Effective Interest Rate on Debt %, the Interest Expense of the last fiscal year and the average total debt over the fiscal year are used. In calculating the quarterly data, the Interest Expense data used here is two times the semi-annual (Dec. 2025) interest expense data. Effective Interest Rate on Debt % is displayed in the 30-year financial page.

What does a Effective Interest Rate on Debt % of 11.09% mean?
Theon International (STU:W8C) has a Effective Interest Rate on Debt % of 11.09% as of Dec. 2025. Effective interest rate on debt is the rate a company actually pays on its debt. View historical data on Theon International and its competitors.
Is Theon International's Effective Interest Rate on Debt % too high?
Theon International's current Effective Interest Rate on Debt % is 11.09%. Overall, Theon International has a GF Score™ of 47/100, reflecting its overall financial health beyond just this single metric.
How does Theon International's Effective Interest Rate on Debt % compare to SPCX and GE?
Theon International's Effective Interest Rate on Debt % of 11.09% can be compared against companies in the Aerospace & Defense industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Effective Interest Rate on Debt % for an Aerospace & Defense company?
A good Effective Interest Rate on Debt % depends on the Aerospace & Defense industry context. However, Effective Interest Rate on 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 Effective Interest Rate on Debt % mean?
A high Effective Interest Rate on Debt % can signal that a stock is expensive relative to its fundamentals. Effective interest rate on debt is the rate a company actually pays on its debt. View historical data on Theon International and its competitors. Theon International's current Effective Interest Rate on Debt % is 11.09%. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Theon International stock overvalued right now?
Theon International (STU:W8C) has a current Effective Interest Rate on Debt % of 11.09%. The current Effective Interest Rate on Debt % is 11.09%. Theon International's overall GF Score™ is 47/100 with 4 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Effective Interest Rate on Debt % calculated?
Effective Interest Rate on Debt % is calculated from a company's financial statements. For Theon International (STU:W8C), the current Effective Interest Rate on Debt % is 11.09% as of Dec. 2025. 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.

Theon International Business Description

Other Exchanges THEON:NetherlandsTHEONa:UK
Address 5 Agios Antonios Street, 1st floor, Office 102, Nicosia, CYP, 2002
Theon International PLC is a defense and security technology company specializing in electro-optical systems and integrated solutions for military and security applications. It develops and manufactures night vision and thermal imaging systems used by defense and security organizations. The company operates internationally through subsidiaries and production facilities across multiple regions. Its products are used by armed forces and security agencies in various countries. In addition to electro-optical systems, it develops integrated soldier systems, ISR optronics, and platform solutions for land and maritime environments.
47GF Score

Get the complete analysis for STU:W8C

Effective Interest Rate on Debt % is just one metric. See GF Value™, 30-year financials, guru trades, warning signs, and more.

€34.80
Price