As many private equity firms have remained decidedly cautious over the past year, nursing damages from previous years’ over-enthusiastic acquisitions, The Riverside Company has taken a decidedly more active approach.

The Cleveland, Ohio-headquartered private equity firm made several acquisitions over the past year, most recently inking a series of healthcare-related acquisitions. Riverside acquired FairPay Solutions, Inc., a healthcare billing system. In a separate transaction, the firm bought Crioestaminal, a Coimbra, Portugal-based biotechnology company. Terms of both transactions were not disclosed.

The investment firm bought Addison, Texas-based FairPay from a collection of stakeholders, including First Capital, Tobat Capital, and FairPay’s founder and management team. Riverside completed the transaction using capital from Riverside’s most recent fund, Riverside Capital Appreciation Fund V. Additional financing was provided by MidCap Financial, Siemens Financial Services and Audax Mezzanine.

Riverside partner Karen Pajarillo led the transaction. Vice president Sarah Roth, associate Steve Burns, analyst Solomon Cole also worked on the transaction.

The firm completed its acquisition of Crioestaminal using capital from the Riverside Europe Fund IV. The buyout firm was advised by Ernst & Young and received legal advise from Garrigues LLC.

The firm closed its fifth fund in June with $1.17 billion in committed capital, about $900 million target above its initial target.

The healthcare sector has seen significant interest from private equity buyers in recent months. In September, Cortec Group bought a majority stake in 180 Medical Inc. In addition, Miguel Fernandez, chairman of Florida-based private equity firm MBF Healthcare Partners, LP, committed $100 million in capital to invest in a new managed care healthcare platform, Simply Healthcare Plans, also in September.

Riverside acquired Kaul GmbH, a confectionary glazing company based in Germany in September. In April, DuBois Chemicals, a Riverside Company platform company, acquired Pennsylvania-based Blendco Systems LLC.

Riverside is headquartered in Ohio and has additional locations in Atlanta, Brussels, Budapest, Chicago, Cleveland, Dallas, Eindhoven, Hong Kong, Los Angeles, Madrid, Munich, New York, Prague, San Francisco, Seoul, Stockholm, Tokyo and Warsaw. Calls placed to the firm were not returned by press time.