Applied Optoelectronics, Inc. (AAOI) operates in the semiconductors industry, focusing on fiber-optic networking products, which aligns with permissible business activities under Shariah principles. Financial ratios indicate strong compliance across AAOIFI, MSCI, and S&P standards, with low debt, liquidity, and non-compliant income levels. The company demonstrates robust corporate governance and low ESG risks, with no controversies or defense involvement. Inclusion in all major Shariah indices confirms overall compliance, though investors should monitor industry-specific supply chain ethics. Purification is required at 1.73% due to minimal interest income.