Constellium announces secondary offering by selling shareholder

Constellium N.V. announced today that an affiliate of Apollo Global Management, LLC has agreed to sell 12,561,475 Class A Ordinary Shares of the Company in an underwritten offering. The Company will not sell any shares in the offering and will not receive any proceeds from the offering. Goldman, Sachs & Co. will act as underwriter for the offering. In connection with the offering, the Company has agreed not to offer or sell any Class A Ordinary Shares of the Company for a period of 30 days from the date hereof, subject to certain exceptions.

A shelf registration statement (including a prospectus) relating to the Class A Ordinary Shares is effective with the Securities and Exchange Commission ("SEC"). The offering is being made only by means of a prospectus. A prospectus supplement relating to the offering will be filed with the SEC. When available, a copy of the prospectus supplement relating to the offering may be obtained by contacting: Goldman, Sachs & Co., Prospectus Department, 200 West Street, New York, NY 10282, telephone: 866- 471-2526, facsimile: 212-902-9316, or by email at: prospectus-ny@ny.email.gs.com.