DALLAS & NEW YORK & LONDON & TOKYO–(BUSINESS WIRE)–Lone Star Funds (“Lone Star”) today announced the signing by an affiliate of Lone Star Fund X, LP of a binding agreement to sell Xella Group (“Xella”), a leading provider of walling solutions, to Holcim, the leading partner for sustainable construction. The transaction values Xella at approximately €1.85 billion. Headquartered in Duisburg, Germany, Xella is a European provider of efficient and sustainable walling solutions for the entire hous