CHICAGO and NORTH CHELMSFORD, Mass. - R. R. Donnelley & Sons Company (Nasdaq:RRD) and Courier Corporation (Nasdaq:CRRC) jointly announced today the expiration of the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976 ("HSR") in connection with the previously announced merger agreement under which RR Donnelley will acquire all of the outstanding common stock of Courier Corporation. The waiting period expired on Monday, March 23 .

Expiration of the HSR waiting period satisfies one of the conditions to the closing of the proposed merger, which remains subject to approval by the shareholders of Courier Corporation and other customary closing conditions. The transaction is expected to close in the second quarter of 2015.