Investor Relations

WILMINGTON, Mass.--(BUSINESS WIRE)--Jan. 12, 2004--Charles River Laboratories International, Inc. (NYSE:CRL) will release fourth-quarter and full-year 2003 financial results on Tuesday, February 10, 2004, after the market closes. A conference call has been scheduled to discuss the results on Wednesday, February 11, 2004, at 8:30 a.m. Eastern time.

Investors will have the opportunity to listen to a live webcast of the conference call through the Investor Relations section of the Company's website at ir.criver.com. A replay will be accessible through the website approximately two hours following the conference call and will remain available until Wednesday, February 18, 2004.

Charles River Laboratories, based in Wilmington, Massachusetts, is a leading provider of critical research tools and integrated support services that enable innovative and efficient drug discovery and development. The Company is the global leader in providing the animal research models required in research and development for new drugs, devices and therapies. The Company also offers a broad and growing portfolio of biomedical products and services that enable customers to reduce cost, increase speed, and enhance productivity and effectiveness in drug discovery and development. Charles River's customer base spans over 50 countries, and includes all of the major pharmaceutical companies, biotechnology companies, and many leading hospitals and academic institutions. The Company operates 82 facilities in 16 countries worldwide. For more information, visit the Company's web site at www.criver.com.

CONTACT: Investor Relations Contact:
Charles River Laboratories International, Inc.
Susan E. Hardy, 978-658-6000 Ext.1616

SOURCE: Charles River Laboratories International, Inc.