Wall Street Zen upgraded shares of Charles River Laboratories International (NYSE:CRL – Free Report) from a buy rating to a strong-buy rating in a research note issued to investors on Monday. Get Charles River Laboratories International alerts:View Our Latest Report on Charles River Laboratories InternationalCharles River Laboratories International Stock PerformanceNYSE CRL opened at $146.88 on Monday. Charles River Laboratories International (NYSE:CRL – Get Free Report) last issued its earnings results on Wednesday, August 6th. Charles River Laboratories International Company Profile(Get Free Report)Charles River Laboratories International, Inc provides drug discovery, non-clinical development, and safety testing services in the United States, Europe, Canada, the Asia Pacific, and internationally. Read MoreReceive News & Ratings for Charles River Laboratories International Daily - Enter your email address below to receive a concise daily summary of the latest news and analysts' ratings for Charles River Laboratories International and related companies with MarketBeat.com's FREE daily email newsletter.