OSS demonstrates strong financial ratio compliance across AAOIFI, MSCI, and S&P standards, with low debt (2.96%), liquidity (9.62%), and non-permissible income (0.82%). However, significant involvement in defense and military computing applications, estimated at over 50% of revenue, leads to non-compliance in business activity screening under major Shariah authorities and indices. The company operates in its industry with no reported subsidiaries contributing non-compliant revenue. Overall, while purification is minimal for income, the core business model raises ethical concerns aligned with Islamic principles against supporting conflict-related activities. Investors should monitor for shifts away from defense dependencies.