The Short Answer
Schlumberger stock (SLB) is doubtful for Muslim investors — permissible at the activity level, but with concerns that keep it from a clean halal verdict. SLB is the world's largest oilfield-services company, providing drilling, well-construction, reservoir, and production technologies to oil-and-gas operators. Providing energy-extraction services is not explicitly prohibited in Islamic law, and many screeners treat the sector as permissible.
Current quantitative Sharia screen
Based on 10-Q figures for the period ended 2026-03-31; calculated 2026-07-15.
11,608 / 54,526
3,387 / 54,526
11,856 / 54,526
20 / 8,721
- Financial
- Pass
- Overall
- Incomplete
Debt/assets is 21.29%, liquidity/assets is 6.21%, receivables plus cash/assets is 21.74% and interest income/revenue is 0.23%; activity remains incomplete.
- Financial
- Pass
- Overall
- Incomplete
Debt/assets is 21.29%, liquidity/assets is 6.21% and receivables plus cash/assets is 21.74%, below the examined MSCI limits; activity remains incomplete.
- Financial
- Pass
- Overall
- Incomplete
Debt/assets and liquidity/assets are below 33%; activity remains incomplete and this is not an official classification.
- Financial
- Not calculated
- Overall
- Incomplete
A licensed historical market-cap series is not stored; the filing-based asset screen passes but the overall result remains incomplete.
Business-activity disclosure
SLB provides oilfield services, drilling, reservoir, production, digital and new-energy technologies. Energy services are generally permissible at the activity level, while fossil-fuel externalities, defense-adjacent work and project end uses require separate review.
Limitation: The filing does not provide a reproducible prohibited-revenue numerator for environmental, defense-adjacent or other project end uses.
Purification
First-quarter interest income is disclosed at $20 million, but no scholar-approved purification percentage is inferred.
Inputs, assumptions and primary sources
- Amounts are USD millions from SLB's March 31, 2026 Form 10-Q.
- Debt combines $1,938 million short-term borrowings/current debt and $9,670 million long-term debt.
- Cash is $2,819 million and short-term investments are $568 million; receivables net of allowance are $9,037 million.
- First-quarter revenue is $8,721 million and interest income is $20 million.
- No prohibited-activity revenue numerator is separately disclosed.
This is a reproducible financial screen, not a fatwa. A failed total-assets screen can coexist with a pass under a market-cap methodology. ZakatInvest keeps the qualitative assessment separate so numerical thresholds do not erase material context.
The March 31, 2026 filing shows debt/assets of 21.29%, liquidity/assets of 6.21%, receivables-plus-cash/assets of 21.74% and interest income/revenue of 0.23%. The known financial ratios pass, but environmental and project-end-use review remains incomplete.
Sharia Screening Methodology
Islamic scholars use several criteria to screen stocks:
- Business activity screen: Is the company's primary business halal?
- Debt ratio: Total debt / market cap must be under 33%
- Interest income: Interest income / total revenue must be under 5%
- Haram revenue: Revenue from haram sources must be under 5%
- Receivables ratio: Total receivables / total assets must be under 49–70% (varies by board)
What Schlumberger Does
Schlumberger Limited (SLB, headquartered in Houston with historic roots abroad) is the largest oilfield-services firm in the world. Its business spans:
- Well construction: Drilling, measurement, and fluids for building oil-and-gas wells.
- Reservoir performance: Evaluation and stimulation services.
- Production systems: Equipment and technology for producing hydrocarbons.
- Digital and integration: Software and data services for operators, plus a growing new-energy segment.
SLB sells services and technology to energy producers rather than extracting and selling oil directly.
Why It Raises Sharia Concerns
1. Environmental Concerns
Some contemporary scholars raise concerns about environmental harm (fasad fil-ard) associated with intensive fossil-fuel extraction. This is an ethics-based concern rather than a strict prohibition — screeners differ on how much weight to give it — but it is why energy-services names are often treated as doubtful rather than clearly halal.
2. Meaningful Debt (Deciding Screen)
SLB carries a meaningful debt load. Its total-debt-to-market-cap ratio is a deciding screen that should be confirmed against the 33% threshold using the latest filings.
3. Receivables and Interest Income
As a project-based services firm, SLB carries meaningful receivables, so the receivables ratio should be confirmed against the board's threshold (49–70%). A small amount of interest income should be checked against the 5% threshold and the corresponding portion purified.
Current Filing-Based Quantitative Screen
Based on SLB's March 31, 2026 Form 10-Q:
- Debt / Assets: 21.29% — below the examined limits ✅
- Liquidity / Assets: 6.21% — below the examined limits ✅
- Receivables + Cash / Assets: 21.74% — below the examined limits ✅
- Interest Income / Revenue: 0.23% — below the examined 5% benchmark ✅
The known asset ratios pass, but the activity screen remains incomplete and market-cap denominator methods were not calculated.
What About Purification?
For investors who take the view that energy services are permissible and the ratios are within range, only the small amount of interest income needs purification. Investors who weight the environmental concern more heavily, or who find the leverage screen breached, may prefer to avoid the stock.
Methodology Interpretation
The known financial ratios pass the examined FTSE Yasaar, MSCI and Malaysia asset proxies, but the overall result is incomplete because project end-use and environmental activity questions are qualitative. No third-party classification is implied.
Bottom Line
Schlumberger (SLB) is doubtful on the current filing-based screen. Energy services are generally permissible and the known financial ratios pass, but environmental and project-end-use questions keep the activity result incomplete.
Investors seeking cleaner exposure to the industrial economy may prefer manufacturing and technology names without the environmental-ethics overlay.
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