Investors appear reassured by the company's potential growth prospects, given its record full-year revenue and its acquisition of a rival energy drink brand.

Celsius shares are up more than 30% after its quarterly results topped estimates and it announced plans to buy drink maker Alani Nu.

(Reuters) - Celsius is set to acquire rival energy drink brand Alani Nu for $1.8 billion, the Wall Street Journal reported on Thursday, citing people familiar with the matter. Celsius is expected to fund the deal through a combination of cash and stock, the people familiar with the negotiations told the Wall Street Journal.