Stocks of LL Flooring Holdings Inc. LL rose 21% on Wednesday in premarket trading after the company announced it had received a non-binding unsolicited bid from Cabinets to Go. F9Brands is a holding company that owns and manages a range of companies within the home improvement, luxury home decor, and building products industries. The board of the flooring retailer, previously known as Lumber Liquidators said it will consult financial and legal advisors in order to review the offer. The company’s long-term fundamentals, it believes, are strong. It is also achieving success with its six core growth strategies. “LL Flooring believes it is…