On March 10, 2017, Paul Schwind informed A.M. Castle & Co. (the “company”) of his resignation from his position as Controller and Chief Accounting Officer of the company, effective March 24, 2017. Mr. Schwind’s resignation was not because of a disagreement with the company on any matters relating to the company’s operations, policies, or practices. The company has accepted Mr. Schwind’s resignation. Mr. Schwind’s duties will be assumed by existing company finance personnel until a permanent successor is identified, including Mr. Patrick R. Anderson, the company’s Executive Vice President, Chief Financial Officer, who previously served as the company’s Controller and Chief Accounting Officer from 2007 to 2015.