The Firm recently represented PRA Health Sciences, Inc. (“PRA”), a portfolio company of Kohlberg Kravis Roberts & Co. L.P., in connection with its initial public offering of common stock. The offering of 19,523,255 shares of common stock, which included the underwriters’ option to purchase 2,546,511 additional shares, raised approximately $351 million in gross proceeds. The shares of PRA are now listed on the Nasdaq Global Select Market under the ticker symbol “PRAH”.

PRA expects to use the net proceeds of the initial public offering to repay existing indebtedness and for general corporate purposes.

Jefferies LLC, Citigroup Global Markets Inc., KKR Capital Markets LLC, UBS Securities LLC, Credit Suisse Securities (USA) LLC and Wells Fargo Securities, LLC acted as joint book-running managers for the offering. Robert W. Baird & Co. Incorporated and William Blair & Company, L.L.C. acted as co-managers for the offering.

PRA Health Sciences, Inc. is one of the world’s leading global contract research organizations, or CROs, by revenue, providing outsourced clinical development services to the biotechnology and pharmaceutical industries. PRA’s global clinical development platform includes more than 75 offices across North America, Europe, Asia, Latin America, South Africa, Australia and the Middle East and more than 10,000 employees worldwide. Since 2000, PRA has performed approximately 2,300 clinical trials worldwide and has worked on more than 100 marketed drugs across several therapeutic areas. In addition, PRA has conducted the pivotal or supportive trials that led to U.S. Food and Drug Administration, or international regulatory approval of more than 45 drugs.

The Simpson Thacher team included Richard Fenyes, Justin Cooke, Jessica Garcia and Gabriela Botifoll (Capital Markets); Jennifer Nadborny, Dov Gottlieb and Alan Langer (Public Company Advisory Practice); Gary Horowitz and Phong Quan (M&A); Jodi Sackel (Tax); David Rubinsky, David Teigman and Eric Wolf (Executive Compensation and Employee Benefits); Marcela Robledo (Intellectual Property); and Jennie Getsin (FINRA).