What is Castle Biosciences, Inc.'s Shariah compliance score?

Castle Biosciences, Inc. (CSTL) has a Shariah compliance score of 62/100 (Grade: B, Acceptable). AAOIFI Standard No. 21 requires: (1) no primary involvement in prohibited activities like alcohol, gambling, or conventional banking, (2) debt-to-market-cap below 30%, (3) interest-bearing deposits below 30%, and (4) prohibited income below 5%.

Does Castle Biosciences, Inc. pass AAOIFI screening?

Castle Biosciences, Inc. (CSTL) is rated Doubtful under AAOIFI Shariah screening, which is neither a clear pass nor a clear fail. AAOIFI Standard No. 21 requires: (1) no primary involvement in prohibited activities like alcohol, gambling, or conventional banking, (2) debt-to-market-cap below 30%, (3) interest-bearing deposits below 30%, and (4) prohibited income below 5%. CSTL's debt-to-market-cap is 1.0%.

How much purification is needed for Castle Biosciences, Inc.?

Muslim investors purify the portion of dividends and realized gains that comes from non-permissible income by donating it to charity. HalalScreener's purification calculator at halalscreener.app/en/purification computes the percentage and amount for Castle Biosciences, Inc. (CSTL) using the latest financial data.

Where can I screen Castle Biosciences, Inc. for Shariah compliance for free?

HalalScreener (halalscreener.app) offers free Shariah compliance screening for Castle Biosciences, Inc. (CSTL) and 8,200+ securities. US-listed stocks and ETFs are screened under AAOIFI Standard No. 21. Bursa Malaysia securities carry the Securities Commission Malaysia's official status. Coins are screened separately, under published scholarly opinion. The verdict is free, with no credit card or signup required for basic screening. The compliance grade, score, and debt ratio are free too; the full ratio breakdown is part of Pro.

CSTLDoubtfulB

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Compliance Status

Doubtful

Screened on Oct 14, 2026 · AAOIFI Standard 21

Acceptable

62Score

Is Castle Biosciences, Inc. (CSTL) halal? Doubtful. Based on AAOIFI screening, Castle Biosciences, Inc. passes the business activity screen but has financial ratios approaching AAOIFI limits with a compliance score of 62/100 (Grade: B).

Quote this verdict

HalalScreener rates Castle Biosciences, Inc. (CSTL) Doubtful, 62/100, grade B under AAOIFI Standard 21, screened Oct 14, 2026. Source: https://halalscreener.app/en/stock/CSTL

AvoidBorderlineClean

Business activity

What the company sells is permissible.

Passed

Company debt

Well clear of the limit

How much the company borrows, compared to its total value. AAOIFI allows up to 30%.

1.0% of 30.0% limit

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The verdict above is final and free.

Pro members can verify every number behind it: interest-bearing deposits, prohibited income breakdown, and the full AAOIFI math.

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Screened according to AAOIFI Standard 21

What this means for you

You may own CSTL, with caution

Its numbers sit close to AAOIFI limits. Cautious investors may prefer alternatives or ask a scholar first.

Purification amount is Pro

We have screened CSTL's prohibited income, but the exact share you would need to purify is part of Pro.

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CSTL: Is Castle Biosciences, Inc. Halal?

Castle Biosciences, Inc.

NASDAQHealthcareUS

$31.96

Market Cap: 976.4M

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About Castle Biosciences, Inc.

Castle Biosciences, Inc. functions as a commercial-stage diagnostics firm, with its primary objective being the provision of both diagnostic and prognostic testing services, specifically targeting various dermatological cancers. Their flagship product, DecisionDx-Melanoma, represents an advanced multi-gene expression profile (GEP) assay engineered to assess the probability of metastasis in patients afflicted with invasive cutaneous melanoma. In addition to their leading solution, the company has created several other specialized, proprietary tests. Among these is DecisionDx-UM, a GEP test tailored to forecast the risk of metastasis for individuals with uveal melanoma, a less common malignancy of the eye. Another key offering is DecisionDx-SCC, a distinctive 40-gene expression profile test that utilizes a patient's unique tumor biology to predict their specific risk of squamous cell carcinoma metastasis, particularly for those presenting with recognized risk factors. Moreover, they offer DecisionDx DiffDx-Melanoma and myPath Melanoma, both proprietary GEP tests employed to assist in the accurate diagnosis of ambiguous pigmented lesions. These specialized testing services are provided by Castle Biosciences to patients predominantly through their healthcare providers. The organization commenced operations in 2007 and maintains its corporate headquarters in Friendswood, Texas.

Sector: Healthcare · Industry: Medical - Diagnostics & Research

Why This Stock Is Doubtful

Interest-bearing deposits are close to the 30% limit.

Stocks are marked Doubtful when financial ratios pass but approach AAOIFI thresholds. Consider consulting a qualified scholar for a definitive ruling.

Shariah Compliance Status

AAOIFI Standard 21Updated Oct 14, 2026

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Screened according to AAOIFI Standard 21

Compliance History

Doubtfulnow
since Aug 2026
Not Halal
until the change above

Tracked since May 2026. Updates automatically on each re-screen.

Fiscal: Q2 2026Data source: EDGAR

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Frequently Asked Questions

Is Castle Biosciences, Inc. (CSTL) halal to invest in?

Castle Biosciences, Inc. (CSTL) is rated Doubtful under AAOIFI Standard 21. It passes the business activity screen but one or more financial ratios are approaching (though not yet exceeding) the AAOIFI thresholds (30% for debt and interest deposits, 5% for prohibited income). Consult a qualified Islamic finance scholar for a personal ruling.

Why did Castle Biosciences, Inc. get a B compliance rating?

Castle Biosciences, Inc. (CSTL) received a grade of B (Acceptable) based on three AAOIFI Standard 21 financial ratios: debt-to-market-cap of 1.0% (limit 30%). The grade reflects the margin of safety across all three ratios relative to their thresholds.

What could change Castle Biosciences, Inc.'s Shariah verdict?

Castle Biosciences, Inc.'s verdict is re-evaluated at each annual re-screen. Three events could change it: (1) the debt-to-market-cap ratio crossing 30%, typically from new debt issuance or a major drop in share price; (2) interest-bearing deposits exceeding 30% of market cap; or (3) prohibited revenue (alcohol, gambling, conventional finance, etc.) exceeding 5% of total revenue. Verdict flips are tracked in the compliance history section above.

How often is Castle Biosciences, Inc. re-screened for Shariah compliance?

Castle Biosciences, Inc. (CSTL) is re-screened annually using the most recent full-year financial data from SEC filings. HalalScreener also triggers an on-demand re-screen whenever the stored data is more than 7 days old, ensuring the ratios reflect the latest available financial statements. Last screened: Oct 14, 2026.

Screened according to AAOIFI Standard No. 21 · For informational purposes only. Consult a qualified Islamic finance advisor before investing.

Disclaimer: This screening is for informational purposes only and does not constitute financial, legal, or religious advice. Compliance is evaluated using AAOIFI financial standards (debt, deposits, and prohibited income ratios) and publicly available data. Ethical, political, social, or environmental considerations are outside the scope of this screening. Individual scholars and methodologies may differ. Always consult a qualified Islamic finance advisor before making investment decisions.