INC Research Announces Pricing of Secondary Offering

Raleigh, N.C., August 11, 2015 (GLOBE NEWSWIRE) — INC Research Holdings, Inc. (Nasdaq:INCR), a leading global Phase I to Phase IV contract research organization, announced the pricing of its secondary offering of 8,000,000 shares of its Class A common stock by certain of its existing stockholders, including affiliates of Avista Capital Partners, L.P.; affiliates of Teachers’ Private Capital, the private investment arm of Ontario Teachers’ Pension Plan Board; and current and former employees of INC Research. INC Research will not receive any proceeds from the sale of the shares by the selling stockholders in this offering. The closing of the offering is expected to occur on August 17, 2015, subject to customary closing conditions.

Credit Suisse Securities (USA) LLC and J.P. Morgan Securities LLC are the joint book-running managers for the offering.

A registration statement relating to these securities has been filed with, and declared effective by, the Securities and Exchange Commission. This press release shall not constitute an offer to sell or the solicitation of an offer to buy, nor shall there be any sale of these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such state or jurisdiction. The registration statement INC Research has filed with the SEC can be obtained by visiting EDGAR on the SEC website at www.sec.gov.

The offering will be made only by means of a prospectus, copies of which may be obtained, when available, from Credit Suisse Securities (USA) LLC, Attention: Prospectus Department, One Madison Avenue, New York, NY10010, or by telephone at 1-800-221-1037, or by e-mail at [email protected] and J.P. Morgan Securities LLC, c/o Broadridge Financial Solutions, 1155 Long Island Avenue, Edgewood, NY 11717, or by telephone at 1-866-803-9204.

Forward-Looking Statements

Except for historical information, all of the statements, expectations, and assumptions contained in this press release are forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. Actual results might differ materially from those explicit or implicit in the forward-looking statements. Important factors that could cause actual results to differ materially include, but are not limited to: fluctuations in our financial results; our ability to maintain or generate new business awards; our backlog not being indicative of future revenues and our ability to realize the anticipated future revenue reflected in our backlog; our ability to adequately price our contracts and not overrun cost estimates; our customer or therapeutic area concentration; international economic, political and other risks; our ability to increase our market share, grow our business and execute our growth strategies; and the other risk factors set forth in our Form 10-K for the year ended December 31, 2014, our Form 10-Q for the quarter ended March 31, 2015, and other SEC filings, copies of which are available free of charge on our website at investor.incresearch.com. INC Research assumes no obligation and does not intend to update these forward-looking statements, except as required by law.

About INC Research

INC Research (Nasdaq:INCR) is a leading global contract research organization (“CRO”) providing the full range of Phase I to Phase IV clinical development services for the biopharmaceutical and medical device industries. Leveraging the breadth of our service offerings and the depth of our therapeutic expertise across multiple patient populations, INC Research connects customers, clinical research sites and patients to accelerate the delivery of new medicines to market. The Company was ranked “Top CRO to Work With” among large global CROs in the 2015 CenterWatch Global Investigative Site Relationship Survey. INC Research is headquartered in Raleigh, NC, with operations across six continents and experience spanning more than 100 countries.