Is GLW (Corning Incorporated) Halal or Haram?

Based on our AAOIFI-standard shariah screening, GLW is Halal and considered permissible for Muslim investors. It passed all 4 of 4 compliance screens including business activity review, debt-to-market-cap ratio (7.88% vs ≤33% threshold), interest income ratio (0.24% vs ≤5% threshold), and cash & securities ratio (1.18% vs ≤33% threshold).

Corning Incorporated is a global leader in materials science, specializing in specialty glass, ceramics, and optical physics. The company manufactures critical components like glass substrates for LCD and OLED displays, as well as optical fibers and cables used in global telecommunications networks. For Muslim investors, Corning represents a solid halal investment opportunity within the technology sector. The stock successfully passes all four AAOIFI Shariah screens, meaning both its core business activities and its financial structures align with Islamic finance principles. From a financial perspective, Corning demonstrates excellent compliance with a very conservative debt-to-market cap ratio of just 7.9%. Additionally, its interest-bearing cash and securities sit at only 1.2% of its market capitalization, showing minimal reliance on interest-based financial instruments. Since there are no major scholarly debates regarding the permissibility of glass and optical manufacturing, the primary focus for halal investors is simply monitoring the company's debt levels. Investors should review Corning's balance sheet quarterly to ensure these financial ratios remain safely below the 33% threshold. Corning Incorporated operates in the Technology sector under the Hardware, Equipment & Parts industry and is headquartered in Corning, NY, US. The company is led by CEO Wendell Weeks and employs approximately 56,300 people.

GLW was screened using AAOIFI-based shariah compliance criteria. Four tests are applied: (1) Business Activity — the company's core business must not derive primary income from haram (prohibited) activities such as alcohol, gambling, tobacco, or interest-based finance. (2) Debt-to-Market-Cap — total debt must not exceed 33% of market capitalization. (3) Interest Income — interest income must not exceed 5% of total revenue. (4) Cash & Securities — cash and interest-bearing securities must not exceed 33% of market cap. GLW passed 4 of these 4 screens.

Although GLW passes all shariah screens, it does earn $38.0M in interest income (0.24% of revenue). Many scholars recommend purifying this portion by donating the equivalent percentage of any dividends received to charity. For example, if you receive $100 in dividends, you would donate approximately $0.24 to purify the income.

GLW was last screened on 2026-04-29. Shariah compliance status can change as companies report new financial data, acquire new businesses, or shift revenue streams. We recommend checking back periodically for the most up-to-date screening results.