– Virtual Investor Day Scheduled on May 27^th –

Charles River Laboratories International, Inc. (NYSE: CRL) will release first-quarter 2021 financial results on Tuesday, May 4^th, before the market opens. A conference call has been scheduled to discuss this information on Tuesday, May 4^th, at 9:00 a.m. ET.

Investor Day

Charles River will also host a virtual Meeting with Management on Thursday, May 27^th, starting at 8:30 a.m. ET. The virtual event will feature presentations from Charles River’s senior management team, including an overview of its strategic focus, business developments, and updated financial targets.

Investors and the general public will have the opportunity to listen to webcasts of the earnings conference call and the Investor Day event through a link that will be posted on the Investor Relations section of the Company's website at ir.criver.com. Webcast replays will be accessible through the same website.

About Charles River

Charles River provides essential products and services to help pharmaceutical and biotechnology companies, government agencies and leading academic institutions around the globe accelerate their research and drug development efforts. Our dedicated employees are focused on providing clients with exactly what they need to improve and expedite the discovery, early-stage development and safe manufacture of new therapies for the patients who need them. To learn more about our unique portfolio and breadth of services, visit www.criver.com.

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