Merck KGaA agreed to acquire a controlling stake in Serono SA by purchasing the Bertarelli family's shares in the company, which represent 64.5 percent of its equity and 75.5 percent of its voting rights. (BioWorld International)

Merck KGaA agreed to acquire a controlling stake in Serono SA by purchasing the Bertarelli family's shares in the company, which represent 64.5 percent of its equity and 75.5 percent of its voting rights. (BioWorld International)