Is it permissible to buy shares of a company whose activity is halal, but without available statements clarifying the percentage of its dealings in lending or borrowing, and if not permissible, then what is the way to know the volume of loans in the company's capital?

Trading in shares is permissible under two conditions: that the activity of the institutions and companies is Islamically permissible, and that their funds do not deal with Riba (interest) through lending or borrowing. It is not sufficient for the company's primary activity to be permissible; rather, it must be ensured that it does not deal with interest-based loans.