Atkore Launches Secondary Public Offering of Common Stock

HARVEY, Ill. — Atkore International Group Inc. announced the launch of an underwritten secondary public offering of 8,000,000 shares of common stock by selling stockholder CD&R Allied Holdings, L.P., an affiliate of Clayton, Dubilier & Rice, LLC. The Company will not receive any proceeds from the sale of shares being sold in this offering. In connection with the offering, the selling stockholder has granted the underwriters a 30-day option to purchase up to an additional 1,200,000 shares of common stock.

The offering is being made through an underwriting group led by Credit Suisse, Deutsche Bank Securities and J.P. Morgan, who are acting as joint book-running managers and as representatives of the underwriters for the offering. UBS Investment Bank is acting as a junior book-running manager and Citigroup, RBC Capital Markets and Wells Fargo Securities are acting as additional book-running managers for the offering.

Copies of the prospectus may be obtained from:

• Credit Suisse Securities (USA) LLC, Attention: Prospectus Department, One Madison Avenue, New York, New York 10010, via telephone: (800) 221-1037, or via email: newyork.prospectus@credit-suisse.com;
• Deutsche Bank Securities Inc., Attention: Prospectus Group, 60 Wall Street, New York, New York 10005, via telephone: (800) 503-4611, or via email: prospectus.cpdg@db.com;
• J.P. Morgan Securities LLC, c/o Broadridge Financial Solutions, Attention: Prospectus Department, 1155 Long Island Avenue, Edgewood, New York 11717, or via telephone: (866) 803-9204; or
• UBS Securities LLC, Attention: Prospectus Department, 1285 Avenue of the Americas, New York, New York 10019, or via telephone: (800) 827 7275.

A registration statement relating to these securities has been filed with the U.S. Securities and Exchange Commission but has not yet become effective. These securities may not be sold nor may offers to buy be accepted prior to the time the registration statement becomes effective. 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 shares in any state in which such offer, solicitation or sale would be unlawful, prior to registration or qualification under the securities laws of any state.