Avista Capital Partners has announced the closing of its latest fund with $1.5 billion in commitments.

The fund, Avista Healthcare Partners VI, was oversubscribed, exceeding its $1.25 billion target. The new fund will focus on investing in high-growth middle market product and technology healthcare companies in North America and Europe.

Avista, based in New York, makes control buyout investments in middle market healthcare companies. Founded in 2005, the firm focuses on the following healthcare subsectors: pharmaceuticals, medical devices, outsourced pharmaceutical services, distribution and consumer-driven healthcare.