Linden Capital Partners announced earlier this month that it acquired ProPharma Group and, in a separate transaction, acquired Merical.

Linden, based in Chicago, seeks control equity in middle-market companies. A leading private equity firm, Linden focuses exclusively on healthcare, pursuing investments in the provider services, non-reimbursement healthcare and life sciences/pharmaceutical industries, as well as hospitals and other major facilities.

ProPharma Group, based in Overland, Kan., is a provider of outsourced medical information, pharmacovigilance, and compliance consulting services to customers in the pharmaceutical, biotechnology and medical device industries.

Merical, based in Orange, Calif., is a developer, manufacturer, and packager of probiotic and other nutritional supplements.