AMERICAN ADVENTURE: Heidi Klein, the luxury British swimwear brand, has a new investor, and is eyeing the U.S. market. The Pentland Group has taken a significant minority stake in the brand founded by Penny Klein and Heidi Gosman in 2002. “We were looking for someone to help us take the brand to the next level — and Pentland is taking a long view on the company,” said Klein, who also serves as commercial director. The U.K. is the brand’s biggest market, but the team will be in New York at the Mercer Hotel this week to showcase the resort collection to U.S. buyers. The brand has two stand-alone stores in London and wholesale stockists include Harrods, Selfridges, Intermix and Net-a-porter. This season, it has also expanded its accessories collections, adding raffia beach and hobo bags, and broadening its core range of hats and other bags.