Hard-seltzer sales are booming in the US - and UBS says these 5 beer companies are best positioned to profit from the trend

Constellation, which is the owner of beer brands such as Modelo and Corona, has a line of flavored malt beverages that are meant to compete with hard seltzer. The line, Corona Refresca, has a variety of fruit flavored beverages. It could boost Constellation's earnings per share by 1.3% over the next 3 years, King said.

Boston Beer Company is responsible for Truly Hard Seltzer. King estimates that Boston Beer could see 5.9% EPS boost over the next 3 years from the Truly brand.

Molson Coors owns the brand Henry's Hard Sparkling water, which boasts zero sugar in its cans. It could boost Molson Coors' EPS by 0.9% over the next 3 years, according to King.

Diageo is the company behind Smirnoff, which also has a line of spiked seltzer. Its spiked-seltzer sales increased 86% over the last four weeks, according to Nielsen data.