Is it permissible to buy a large quantity of paints before their prices increase, based on prior information from an employee of the company?

Each company has its secrets and plans, and an employee divulging them is a betrayal. If there was an agreement with the employee to inform him about a price increase in exchange for money, then it is not permissible. As for the buyer, he may benefit from the information in his purchase, because that does not harm the company as long as he buys at today's price. But the employee is not allowed to divulge what he has been entrusted with.