Charles River Laboratories International, Inc. is an early-stage contract research company. The Company is engaged in laboratory animal medicine and science (research model technologies) and develop a portfolio of discovery and safety assessment services, both good laboratory practice (GLP) and non-GLP, which supports its clients from target identification through non-clinical development. The Company operates in three segments: Research Models and Services (RMS), Discovery and Safety Assessment (DSA), and Manufacturing Support (Manufacturing). The RMS segment includes Research Models and Research Model Services. The DSA segment includes Discovery Services and Safety Assessment. The Manufacturing segment includes Microbial Solutions, Avian, Biologics and Contract Manufacturing. The Company also provides a suite of products and services to support the Company's clients' manufacturing activities.