Castle Biosciences

No. As of October 30, 2026, CSTL is not Shariah-compliant under AAOIFI standards, so it is not considered halal to invest in. Castle Biosciences fails the business screen, the financial screen or both, based on its most recent financial reports. The Zoya app shows which one and lists Shariah-compliant alternatives.

Yes, Castle Biosciences does have interest income. According to the company's latest annual report for the fiscal year ending Dec 31, 2025, Castle Biosciences reported revenue of $344,229,000 and interest income of $11,772,000. The interest income represents 3.42% of the combined total. It's worth noting that some companies may report additional interest income as part of their revenue. For a detailed breakdown of all interest income and revenue segments, please refer to the full Shariah compliance report available in the Zoya app.

We use the guidelines set by the Accounting and Auditing Organization for Islamic Financial Institutions (AAOIFI) to assess Shariah compliance. AAOIFI is a leading international organization that establishes standards for Islamic finance. Their guidelines help determine if a company's business activities and financial structure align with Islamic principles. These standards are widely respected in the Islamic finance industry and provide a consistent framework for evaluating the Shariah compliance of stocks and other financial instruments. AAOIFI's Shariah board includes renowned scholars such as Sheikh Muhammad Taqi Usmani, Sheikh Mohamed Ali Elgari, Sheikh Abdullah AlManea, Sheikh Nizam Yaquby, and Dr. Aznan Hassan.

The Shariah compliance status of Castle Biosciences stock is reviewed on a regular basis, with a minimum frequency of once per quarter. However, if there are any significant changes or major developments in the company's operations that may impact its compliance, an immediate review will be conducted to ensure ongoing adherence to Shariah principles.

To stay informed, we recommend regularly checking Zoya for updates. You can also enable alerts within the Zoya app to receive notifications whenever there is a change in the Shariah compliance of CSTL, or any other stocks you are monitoring. This is particularly useful as Shariah compliance can fluctuate due to changes in a company's financial ratios or business activities.

No, dividends from CSTL are not considered halal because the stock is currently not Shariah-compliant. When a stock is non-compliant, any dividends received from it are considered impermissible income and should be donated to charity as a form of purification. To learn more about the purification process and how to handle impermissible income, read our comprehensive guide.