X0303 4 2010-06-15 0 0000018172 CASTLE A M & CO CAS 0001179608 HAMADA ROBERT S 3400 NORTH WOLF ROAD FRANKLIN PARK IL 60131 1 0 0 0 Common Stock 2010-06-15 4 S 0 3000 14.13 D 17455 D The transaction was executed in multiple trades at prices ranging from $14.09 to $14.17. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected. Robert J. Perna, Attorney-in-Fact 2010-06-16