Global healthcare provider Roche acquired Ventana Medical Systems in a merger on January 22. Both companies’ boards approved the merger agreement, which included a premium of 4.9% to Ventana’s shareholders. Ventana employees will also be able to continue working for the company at the existing location in Arizona.

Roche expects to gain growth in companion diagnostics as well as advanced and primary staining from its acquisition. It is currently the world’s biggest biotech company, and global leader of in-vitro diagnostics, cancer pharmaceuticals and transplantation, and virology.