New York-based buyout firm Kohlberg Kravis Roberts & Co. has sold $711 million worth of its stock in Raleigh-based PRA Health Sciences Inc., according to a filing Wednesday with the Securities and Exchange Commission.

The firm, better known as KKR, sold 9.5 million shares on Monday at an average price of $74.85 per share, resulting in the $711 million.

It still owns nearly 13.2 million shares of the clinical drug research company worth nearly $1 billion.

PRA Health’s stock closed Wednesday at $75.16, down 54 cents.

PRA International was purchased by KKR in 2013 for $1.3 billion, and the company was renamed PRA Health Sciences in 2014 following a series of acquisitions.

KKR had sold a $416 million stake in the company in November 2016.

The company went public in November 2014, selling 17 million shares at $18 per share, raising more than $300 million.