CSTL (Castle Biosciences) Total Debt per Share: $1.21 (As of Mar. 2026)

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CSTL Castle Biosciences Inc CSTL
79 GF Score
Price $24.69
GF Value $29.22
Valuation Modestly Undervalued
! 4 Warning Signs
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What is Castle Biosciences Total Debt per Share?

Castle Biosciences CSTL -3.16% 79 Total Debt per Share is $1.21 as of Mar. 2026. GuruFocus rates CSTL with a GF Score™ of 79/100 and a GF Value™ of $29.22 (Modestly Undervalued). The stock has 4 warning signs investors should review.

$1.21 (As of Mar. 2026)

Total Debt per Share is calculated as total debt divided by Shares Outstanding (EOP). Total debt is calculated as Long-Term Debt & Capital Lease Obligation plus Short-Term Debt & Capital Lease Obligation. Castle Biosciences's Total Debt Per Share for the quarter that ended in Mar. 2026 was $1.21.

Castle Biosciences Total Debt per Share Historical Data

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The historical data trend for Castle Biosciences's Total Debt per Share 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.

Castle Biosciences Total Debt per Share Chart

Castle Biosciences Annual Data
Trend Dec17 Dec18 Dec19 Dec20 Dec21 Dec22 Dec23 Dec24 Dec25
Total Debt per Share
Get a 7-Day Free Trial Premium Member Only 0.32 0.51 0.56 0.93 1.24

Castle Biosciences Quarterly Data
Jun21 Sep21 Dec21 Mar22 Jun22 Sep22 Dec22 Mar23 Jun23 Sep23 Dec23 Mar24 Jun24 Sep24 Dec24 Mar25 Jun25 Sep25 Dec25 Mar26
Total Debt per Share 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 0.90 1.29 1.27 1.24 1.21
CSTL
79GF Score
Castle Biosciences Inc CSTL
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Castle Biosciences Total Debt per Share Calculation

Castle Biosciences's Total Debt Per Share for the fiscal year that ended in Dec. 2025 is calculated as:

Total Debt Per Share=(Long-Term Debt & Capital Lease Obligation+Short-Term Debt & Capital Lease Obligation)/Shares Outstanding (EOP)
=(35.2+1.7)/29.7
=1.24

Castle Biosciences's Total Debt Per Share for the quarter that ended in Mar. 2026 is calculated as:

Total Debt Per Share=(Long-Term Debt & Capital Lease Obligation+Short-Term Debt & Capital Lease Obligation)/Shares Outstanding (EOP)
=(33.8+2.9)/30.3
=1.21

* 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.

Frequently Asked Questions Learn more about Total Debt per Share →
What does a Total Debt per Share of $1.21 mean?
Castle Biosciences (CSTL) has a Total Debt per Share of $1.21 as of Mar. 2026. Total debt per share equals the per-share value of a company's long-term and short-term debt. View historical data on Castle Biosciences and its competitors.
Is Castle Biosciences' Total Debt per Share too high?
Castle Biosciences' current Total Debt per Share is $1.21. Overall, Castle Biosciences has a GF Score™ of 79/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Castle Biosciences' Total Debt per Share compare to FLGT and MYGN?
Castle Biosciences' Total Debt per Share of $1.21 can be compared against companies in the Medical Diagnostics & Research industry. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Total Debt per Share for a Medical Diagnostics & Research company?
A good Total Debt per Share depends on the Medical Diagnostics & Research industry context. However, Total Debt per Share 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 Total Debt per Share mean?
A high Total Debt per Share can signal that a stock is expensive relative to its fundamentals. Total debt per share equals the per-share value of a company's long-term and short-term debt. View historical data on Castle Biosciences and its competitors. Castle Biosciences's current Total Debt per Share is $1.21. However, context matters — high-growth companies often justify higher valuations. Always evaluate alongside other metrics like GF Score™ and GF Value™.
Is Castle Biosciences stock overvalued right now?
Based on GuruFocus' analysis, Castle Biosciences (CSTL) is currently considered Modestly Undervalued. The stock's GF Value™ is $29.22, compared to a current price of $24.69 — trading 15.5% below its estimated fair value. The current Total Debt per Share is $1.21. Castle Biosciences' overall GF Score™ is 79/100 with 4 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Total Debt per Share calculated?
Total Debt per Share is calculated from a company's financial statements. For Castle Biosciences (CSTL), the current Total Debt per Share is $1.21 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 Castle Biosciences (CSTL) Overvalued in 2026?

Based on GuruFocus' analysis, Castle Biosciences stock appears to be undervalued. The current stock price of $24.69 is trading 15.5% below its estimated GF Value™ of $29.22. GuruFocus considers Castle Biosciences to be Modestly Undervalued.

Key valuation signals for CSTL:

  • Total Debt per Share: $1.21
  • GF Value™: $29.22 vs. price of $24.69 (15.5% below fair value)
  • GF Score™: 79/100 with 4 warning signs

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

Castle Biosciences Business Description

Other Exchanges 086:Germany
Address 1500 West Parkwood Avenue, Suite 401, Friendswood, TX, USA, 77546
Castle Biosciences Inc is a molecular diagnostics company. The group provides test solutions for the diagnosis and treatment of dermatologic cancers, Barrett's esophagus (BE), and uveal melanoma. The product portfolio of the company includes DecisionDx-Melanoma, a risk stratification gene expression profile (GEP) test; DecisionDx-SCC, a risk stratification test for cutaneous squamous cell carcinoma; MyPath Melanoma, a diagnostic GEP test for use in patients with difficult-to-diagnose melanocytic lesions; and TissueCypher, a test to predict future development of progression of high-grade dysplasia and/or esophageal cancer. The company derives revenues through the delivery of test reports for its molecular diagnostic tests.
79GF Score

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

$24.69
Price
$29.22
GF Value