Compliance Status
Doubtful
Screened on Oct 12, 2026 · AAOIFI Standard 21
Good
Is Core Laboratories N.V. (CLB) halal? Doubtful. Based on AAOIFI screening, Core Laboratories N.V. passes the business activity screen but has financial ratios approaching AAOIFI limits with a compliance score of 74/100 (Grade: B+).
Quote this verdict
HalalScreener rates Core Laboratories N.V. (CLB) Doubtful, 74/100, grade B+ under AAOIFI Standard 21, screened Oct 12, 2026. Source: https://halalscreener.app/en/stock/CLB
Business activity
What the company sells is permissible.
Company debt
Close to the limitHow much the company borrows, compared to its total value. AAOIFI allows up to 30%.
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.
Screened according to AAOIFI Standard 21
What this means for you
You may own CLB, 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 CLB's prohibited income, but the exact share you would need to purify is part of Pro.

CLB: Is Core Laboratories N.V. Halal?
Core Laboratories N.V.
$10.00
Market Cap: 458.8M
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About Core Laboratories N.V.
Core Laboratories N.V. (CLB) is a global provider to the oil and gas sector, delivering specialized services and products for characterizing subterranean reservoirs and optimizing hydrocarbon extraction. The company's operations are distinctly segmented into Reservoir Description and Production Enhancement. The Reservoir Description division meticulously analyzes petroleum reservoir rock, fluid, and gas samples. This detailed scientific examination aims to boost the yield and enhance the recovery of oil and gas from clients' reservoirs. Offerings in this segment encompass comprehensive laboratory analysis and on-site field evaluations to determine the properties of crude oil and refined products, alongside performing proprietary and collaborative industry research studies. Conversely, the Production Enhancement segment furnishes an array of services and products vital for well completions, perforations, stimulation processes, and general production activities. This includes providing integrated diagnostic tools designed to assess the efficacy of well completions and to devise strategies for more effective enhanced oil recovery initiatives. Core Laboratories markets and sells its solutions through diverse channels, including direct sales representatives, educational seminars, industry trade exhibitions, print advertising, and a network of distributors. Established in 1936, the company boasts a significant international presence, conducting operations in approximately 50 countries, with its corporate headquarters situated in Amstelveen, the Netherlands.
Sector: Energy · Industry: Oil & Gas Equipment & Services
Why This Stock Is Doubtful
- Interest-bearing debt is 25.0% of market cap, only 5.0 points below the 30% AAOIFI 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
See which ratio caused the failure.
See the exact debt ratio, interest income %, and prohibited revenue that caused the failure. Know before you sell or hold.
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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.
Screened according to AAOIFI Standard 21
Compliance History
Doubtfulnow
since Oct 2026
Halal
until the change above
Tracked since May 2026. Updates automatically on each re-screen.
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Frequently Asked Questions
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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.