Antofagasta, a copper mining company, agreed to acquire a 19% stake in Compañia de Minas Buenaventura, a precious metals company. Financial terms were not disclosed. “Buenaventura looks forward to working with Antofagasta as a collaborative partner to grow the value of our business, including by leveraging their deep expertise and proven track record in responsibly developing and operating world-class copper assets,” Roque Benavides, Buenaventura Chairman.