Hornbach Holding is engaged in the development and operation of do-it-yourself (DIY) megastores with garden centers on an international basis. In addition, Co. and its subsidiaries are engaged in the construction materials and builders' merchant business. Co. operates within two segments: retail business and its real estate business. As of Feb. 28, 2014, Co. was operating a total of 49 DIY megastores with garden centers in eight countries outside Germany.

Mercialys is a real estate company, specialized in the transformation and management of shopping centers. Co. manages a portfolio of 91 properties located throughout France at Dec 31, 2013. Co.'s assets are classified into three categories: large regional shopping centers (GLA of over 365,800 sq. m.), neighborhood shopping centers (GLA of over 181,600 sq. m.), and Other assets (40,900 sq. m.). At Dec. 31, 2013, the portfolio comprised 25 large regional shopping centers, 36 neighborhood shopping centers, and 18 other sites such as food stores, specialty stores, independent cafeterias, service malls, and convenience stores, representing a total gross leasable area of about 588,300 sq. m.