Castle BiosciencesCSTL +0.77%72 Median PS Value is $0.00 as of Jun. 25, 2026. GuruFocus rates CSTL with a GF Score™ of 72/100 and a GF Value™ of $29.15 (Modestly Undervalued). The stock has 4 warning signs investors should review. Among 86 Medical Diagnostics & Research companies, Castle Biosciences ranks worse than 1162789.53% on this metric.
This valuation method assumes that the stock valuation will revert to its historical (10-Year) median in terms of PS Ratio. The reason we use PS Ratio instead of PE Ratio or PB Ratio is because PS Ratio is independent of profit margin, and can be applied to a broader range of situations.
The historical rank and industry rank for Castle Biosciences's Median PS Value or its related term are showing as below:
CSTL's Price-to-Median-PS-Value is not ranked *
in the Medical Diagnostics & Research industry.
Industry Median: 0.87 * Ranked among companies with meaningful Price-to-Median-PS-Value only.
Castle Biosciences (NAS:CSTL) Median PS Value Explanation
This valuation method assumes that the stock valuation will revert to its historical (10-Year) mean in terms of PS Ratio. The reason we use PS Ratio instead of PE Ratio or PB Ratio
is because PS Ratio is independent of profit margin, and can be applied to a broader range of situations.
It also assumes that over time the profit margin is constant. If a company increases its profit margin to a sustainable level, this value might under-estimate its value. If it has permanent declined profit margins, this may over-estimate the company's value.
Castle Biosciences's Price to Median PS Value for today is calculated as
Price to Median PS Value
=
Share Price
/
Median PS Value
=
22.29
/
0.00
=
* 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 Median PS Value Related Terms
Castle Biosciences Median PS Value Historical Data
* Premium members only.
The historical data trend for Castle Biosciences's Median PS Value 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.
CSTL vs FLGT, MYGN, PRE: Median PS Value Comparison
For the Diagnostics & Research subindustry, Castle Biosciences's Price-to-Median-PS-Value, along with its competitors' market caps and Price-to-Median-PS-Value 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.
Castle Biosciences Price-to-Median-PS-Value vs Medical Diagnostics & Research Industry
For the Medical Diagnostics & Research industry and Healthcare sector, Castle Biosciences's Price-to-Median-PS-Value distribution charts can be found below:
* The bar in red indicates where Castle Biosciences's Price-to-Median-PS-Value falls into.
10-Year Median PS Ratio is 0.
Castle Biosciences's Revenue per Share for the trailing twelve months (TTM) ended in Mar. 2026 adds up the quarterly data reported by the company within the most recent 12 months, which was $11.539.
* 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 (CSTL) has a Median PS Value of $0.00 as of Jun. 25, 2026. Median price-sales value is the stock value based on a company's 10-year median price-sales ratio, View historical data on Castle Biosciences and its competitors. According to the industry distribution chart, Castle Biosciences ranks #999999 out of 86 companies in the Medical Diagnostics & Research industry.
Is Castle Biosciences' Median PS Value too high?
Castle Biosciences' current Median PS Value is $0.00. Based on the distribution chart, Castle Biosciences ranks #999999 out of 86 companies in the Medical Diagnostics & Research industry, which is in the bottom quartile relative to peers. Overall, Castle Biosciences has a GF Score™ of 72/100 and is considered Modestly Undervalued, reflecting its overall financial health beyond just this single metric.
How does Castle Biosciences' Median PS Value compare to FLGT and MYGN?
According to the Medical Diagnostics & Research industry distribution chart, Castle Biosciences ranks #999999 out of 86 companies for Median PS Value. This places Castle Biosciences in the lower half of its industry. The industry median Median PS Value is 0.87. See the competitive comparison table and distribution chart on this page for a detailed peer-by-peer breakdown.
What is a good Median PS Value for a Medical Diagnostics & Research company?
The median Median PS Value among Medical Diagnostics & Research companies is 0.87, based on 86 companies in the industry. Companies in the top quartile (top 25%) have a Median PS Value significantly above this median, while those in the bottom quartile fall well below. However, Median PS Value 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 Median PS Value mean?
A high Median PS Value can signal that a stock is expensive relative to its fundamentals. Median price-sales value is the stock value based on a company's 10-year median price-sales ratio, View historical data on Castle Biosciences and its competitors. For the Medical Diagnostics & Research industry, the median Median PS Value is 0.87 — values significantly above this may indicate overvaluation, while values below may suggest a bargain or underlying issues. Castle Biosciences's current Median PS Value is $0.00. 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 $29.15, compared to a current price of $22.29 — trading 23.5% below its estimated fair value. The current Median PS Value is $0.00. Castle Biosciences' overall GF Score™ is 72/100 with 4 warning signs to review. Investors should evaluate multiple metrics — including profitability, growth, and financial strength — before making a decision.
How is Median PS Value calculated?
Median PS Value is calculated from a company's financial statements. For Castle Biosciences (CSTL), the current Median PS Value is $0.00 as of Jun. 25, 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 $22.29 is trading 23.5% below its estimated GF Value™ of $29.15.
GuruFocus considers Castle Biosciences to be Modestly Undervalued.
Key valuation signals for CSTL:
Median PS Value: $0.00
GF Value™: $29.15 vs. price of $22.29 (23.5% below fair value)
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 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.
72GF Score
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