What is the ruling on working for a company whose activity is permissible, but part of its capital was established from usurious loans, or that it borrows and lends with usury, in addition to its primary activity?

For companies with mixed capital (lawful and unlawful, such as an usurious loan), there are three scenarios: First: It is permissible to work if its dealings are exclusively in lawful matters. Second: It is permissible to work only in the lawful aspect if some of its dealings are lawful and some are unlawful, and it is not permissible to work in the unlawful aspect. Third: It is not permissible to work at all if all of its dealings are unlawful, because this is considered assisting in the unlawful.