Is Biogen Stock Halal?
Biogen Inc. · BIIB · NASDAQ
Biogen Inc. (BIIB) passes our AAOIFI-based screen. Its core business is permissible, and (data as of 2026-03-31) interest-bearing debt is 21.3% of market cap and cash plus interest-bearing securities 14.5% — both inside the 30% AAOIFI thresholds. Ratios move with the share price, so check the data-as-of date; any incidental interest income should be purified.
Financial data as of 2026-03-31 · Screening basis: AAOIFI · Last reviewed 2026-06-15
Business Activity Screen
Biogen Inc. is a leading biotechnology firm dedicated to the discovery, development, production, and distribution of treatments for complex neurological and neurodegenerative conditions. Its established portfolio includes a range of medications addressing multiple sclerosis (MS), such as TECFIDERA, VUMERITY, AVONEX, PLEGRIDY, TYSABRI, and FAMPYRA. For spinal muscular atrophy (SMA), Biogen provides SPINRAZA, while FUMADERM is available for the treatment of plaque psoriasis. Among its other key of
Industry: Drug Manufacturers - General · Sector: Healthcare. Verify revenue segments in the latest 10-K for impermissible lines.
Financial Ratio Screen
| Screen | Value | AAOIFI limit | Result |
|---|---|---|---|
| Interest-bearing debt / market cap | 21.3% | < 30% | Pass |
| Cash + interest-bearing securities / market cap | 14.5% | < 30% | Pass |
| Impermissible income / total revenueInterest income $87.8M on $9.81B total revenue (Biogen Inc. FY2025 (fiscal year ended 2025-12-31, Form 10-K)) = 0.9% — under AAOIFI's 5% limit. | 0.9% | < 5% | Pass |
Spot market cap at research date (consider trailing average for borderline names). Data as of 2026-03-31 · thresholds per AAOIFI Shariah standards.
This verdict uses the AAOIFI standard — the most widely used and, at a 30% debt limit, the most conservative mainstream Shariah standard. Interest-bearing debt and interest-bearing securities each stay under 30% of market cap, and impermissible income under 5% of revenue. Other standards (Dow Jones Islamic, S&P Shariah, MSCI Islamic, FTSE Yasaar) use ~33% limits or screen against total assets, so a borderline company can be rated differently by each. How we screen & why screeners disagree →
How Biogen screens across Shariah standards
All three mainstream bases below reach the same conclusion for this company.
| Standard | Debt | Cash & interest securities | Limit / basis | Result |
|---|---|---|---|---|
| AAOIFI (our standard) | 21.3% | 14.5% | < 30% of market cap | Pass |
| Dow Jones Islamic / S&P Shariah thresholdDow Jones and S&P apply this limit against a trailing 24–36-month average market cap; shown here on the same point-in-time market cap for comparison. | 21.3% | 14.5% | < 33% of market cap | Pass |
| MSCI Islamic / FTSE Yasaar basisTotal-assets denominator. MSCI/FTSE also apply entry/exit buffers and a receivables screen we do not reproduce. | 21.3% | 14.5% | < 33.33% of total assets | Pass |
HalalWallet computation reproducing each standard's threshold and denominator from public filings (balance sheet as of 2026-03-31) — not the providers' licensed index determinations, which can differ. Debt is interest-bearing borrowings (operating leases excluded). The impermissible-income screen (< 5% of revenue) is common to all of these standards and is shown in the ratio table above. Dow Jones and S&P apply their limit against a trailing 24–36-month average market cap; MSCI and FTSE add entry/exit buffers and a receivables screen. Full methodology →
Purification
Even Shariah-compliant companies typically earn a small amount of incidental interest on corporate cash. The standard practice is to purify: donate the proportion of your dividends (and, per some scholars, capital gains) attributable to impermissible income. Our purification calculator automates the math from your holding and the company's disclosed figures.
Purification calculatorKeep your portfolio halal
A pass today isn't a pass forever — ratios drift across thresholds between filings. A halal screener monitors holdings continuously.
Related guides
Consider Consulting an Islamic Scholar
Major whether Biogen Inc. is halal decisions often involve nuances that vary by scholarly opinion and personal circumstance. While HalalWallet provides educational comparisons and tools, we are not scholars or financial advisors. For personal guidance on Shariah compliance, consider speaking with a qualified Islamic scholar, your local imam, or a Shariah-certified financial advisor familiar with your situation.
Important: HalalWallet is an educational comparison platform. We do not provide financial, legal, or religious advice.
Product structures and Shariah-compliance oversight vary by provider. Before applying:
- Verify halal compliance directly with the provider.
- Review the contract structure (Murabaha, Ijara, Musharakah, etc.) and any disclosed Shariah board opinions.
- Consult a qualified Islamic finance advisor or scholar for guidance on your individual circumstances.
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Sources and review process
This page is reviewed against HalalWallet editorial standards and source documentation.
Reviewed by: HalalWallet Editorial Team
Last reviewed: 2026-06-01
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