InvestmentsTop Global NewsMarketsReal Estate Lone Star emerges as frontrunner in Saint-Gobain auction: sources By financialnews_rlv83x - April 12, 2019 0 282 U.S. buyout firm Lone Star has emerged as the frontrunner to buy the German building materials business of France’s Saint-Gobain in a deal valued at up to 400 million euros (US$450 million), four sources familiar with the matter said.