FRANKLIN PARK, Ill., May 24 /PRNewswire-FirstCall/ -- A. M. CASTLE & CO. (NYSE:CAS) announced today the pricing of the underwritten public offering of 4,347,826 shares of its common stock at $33.00 per share. Of these shares, Castle is offering 2,347,826 shares and selling stockholders are offering 2,000,000 shares. In addition, Castle has granted the underwriters a 30-day option to purchase 652,174 shares of common stock to cover over-allotments, if any. Castle will not receive any proceeds from the sale of shares by the selling stockholders. The Company expects to complete the sale of these shares on or about May 29, 2007. William Blair & Company and Jefferies & Company are acting as the joint book-running lead managers for the offering. KeyBanc Capital Markets and Davenport & Company LLC are serving as co-managers. Copies of the final prospectus supplement and accompanying prospectus relating to this offering may be obtained from: William Blair & Company Jefferies & Company Prospectus Department Equity Capital Markets 222 West Adams Street 520 Madison Ave. Chicago, IL 60606 New York, NY 10022 The offering will be made only by means of the prospectus. About A. M. Castle & Co. Founded in 1890, A. M. Castle & Co. is a global distributor of specialty metal and plastic products and supply chain services, principally serving the producer durable equipment sector of the economy. Its customer base includes many Fortune 500 companies as well as thousands of medium and smaller-sized firms spread across a variety of industries. Within its core metals business, it specializes in the distribution of alloy and stainless steels; nickel alloys; aluminum and carbon. Through its subsidiary, Total Plastics, Inc., the Company also distributes a broad range of value-added industrial plastics. Together, Castle operates over 65 locations throughout North America and Europe. Its common stock is now traded on the New York Stock Exchange under the ticker symbol "CAS". Safe Harbor Statement / Regulation G Disclosure This release may contain forward-looking statements relating to future financial results. Actual results may differ materially as a result of factors over which the Company has no control. These risk factors and additional information are included in the Company's reports on file with the Securities Exchange Commission. The Company does not take any obligation to update any forward-looking statement. This press release does not constitute an offer to sell or the solicitation of an offer to buy the shares of common stock or any other securities, nor will there be any sale of the shares of common stock or any other securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any state or jurisdiction. DATASOURCE: A. M. Castle & Co. CONTACT: Larry A. Boik, Vice President-Finance & CFO of A. M. Castle & Co., +1-847-349-2576, ; or Analysts, Katie Pyra of Ashton Partners, +1-312-553-6717, , for A. M. Castle & Co.

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