Group 1 - Henkel is in negotiations with Wendel to acquire Stahl Holdings, a Dutch specialty chemicals manufacturer [1] - The potential deal is estimated to be valued at up to €2 billion [1] - Wendel currently holds a 68% stake in Stahl, which it acquired for €520 million in 2006 [1] Group 2 - Stahl specializes in coatings and surface treatment chemicals for materials used in leather products [2] - Henkel produces industrial, commercial, and consumer chemical products, with a majority stake held by the Henkel family [2]