WILMINGTON, Mass.--(BUSINESS WIRE)--Charles River Laboratories International, Inc. (NYSE: CRL) announced today that it has implemented a new accelerated stock repurchase (ASR) program to repurchase $150 million of common stock, as part of its previously announced authorization from its Board of Directors to repurchase up to $750 million of common stock. This new program follows a $300 million ASR program that was completed on February 11, 2011, and resulted in the repurchase of a total of approximately 8.9 million shares.