بسم الله الرحمن الرحيم
(1) If the company is doing business of gold, textiles and mineral water in legal way then it is lawful and halal without any doubt. You should enquire regarding the procedure of the company by authentic sources.
(2) If you share the company both in profit and loss, not only in profit and the profit is fixed by percentage then the business appears to be lawful. Hence there is no need to quit it.
Allah knows Best!
Darul Uloom Deoband