Start4big, the first multisector open innovation initiative promoted by Aigües de Barcelona, CaixaBank, Naturgy, SEAT and Telefónica, has chosen the winning startups of its second Wave of Innovation. In total, six of the 192 proposals submitted reached this final phase, which could involve starting different pilot projects with one of the major companies promoting the initiative. The winners are Validated ID, Mobbeel, Innovae, Solum, Urban Air Purifier and Climate Trade.