GBL to Acquire Health Care Firm Affidea From Swiss Billionaire

European investment firm Groupe Bruxelles Lambert SA agreed to buy health-care services firm Affidea from Switzerland’s richest person, Ernesto Bertarelli.

GBL will invest as much as 1 billion euros ($1.1 billion) of equity in the transaction, it said in a statement on its website Tuesday. B-Flexion, the Bertarelli family’s private investment firm, will fully exit its majority stake, while management will reinvest along with GBL.

Bloomberg News first reportedSunday that GBL was nearing a deal. The purchase could value Affidea at about 1.6 billion euros, people familiar with the matter have said.

The transaction represents GBL’s first sizeable ...