Is it permissible to deal in the shares of a service company that offers great projects to the country, but 60% of its profits result from its purchase of shares in usurious banks, given the absence of Islamic oversight?

Dealing in shares is permissible under Sharia-compliant conditions; otherwise, it is forbidden. If a company announces that 60% of its profits are usurious, then it is forbidden to buy or deal in its shares. Whoever has bought them must repent and dispose of the illicit gains by spending them on the welfare of Muslims, and nullify the contract and return the shares if possible. If not possible, then repentance and disposing of the profits are sufficient. It is not permissible for him to sell these shares.