On Assignment, Inc. (NYSE: ASGN) today announced the public offering of 4,781,857 shares of its common stock by certain selling stockholders. The selling stockholders will receive all of the net proceeds from this offering, and On Assignment will not receive any proceeds from the sale of shares in this offering. BofA Merrill Lynch, Baird and Wells Fargo Securities are acting as joint book-running managers for this offering, with William Blair, BMO Capital Markets, SunTrust Robinson Humphrey and Avondale Partners acting as co-managers. The offering will be made under an effective shelf registration statement filed with the Securities and Exchange Commission. This press release does not constitute an offer to sell or a solicitation of an offer to buy the securities described herein, nor shall there be any sale of these securities in any state or jurisdiction in which such an offer, solicitation or sale would be unlawful prior to registration or qualification under the securities law of any such jurisdiction. The offering is being made by means of a prospectus supplement and accompanying prospectus only. A prospectus supplement relating to this offering will be filed with the Securities and Exchange Commission. Copies of the prospectus supplement and the accompanying prospectus can be obtained from BofA Merrill Lynch, 222 Broadway, 7th Floor, New York, NY 10038, Attention: Prospectus Department or email firstname.lastname@example.org. About On Assignment On Assignment, Inc. (NYSE: ASGN) is a leading global provider of in-demand, skilled professionals in the growing technology, healthcare and life sciences sectors, where quality people are the key to success. On Assignment was founded in 1985 and went public in 1992. The corporate headquarters are located in Calabasas, California, with a network of approximately 129 branch offices throughout the United States, Canada, United Kingdom, Netherlands, Ireland, Belgium and Spain. Additionally, physician placements are made in Australia and New Zealand.