Is it permissible to purchase shares in one of the Libyan airlines and invest in it, or is that considered usury?

For dealing in and investing in stocks to be permissible, the company's field of operation must be lawful, and the company must not invest any portion of shareholders' funds in usurious banks or forbidden matters. Therefore, it is not permissible to deal in the shares of companies that have usurious loans or illicit investments, even if their primary field of operation is permissible, due to the Almighty's saying: "And do not cooperate in sin and aggression."