Charles River Laboratories International Inc. Stock Advances 9.3%, Outperforms Peers

This article was automatically generated by Dow Jones using technology from Automated Insights.

Shares of Charles River Laboratories International Inc. rallied 9.3% to $344.87 on what proved to be an all-around positive trading session for the stock market, with the S&P 500 Index rising 0.6% to 7,757.17 and the Dow Jones Industrial Average rising 0.7% to 52,856.09.

This was the stock's second consecutive day of gains.

Charles River Laboratories International Inc. hit a new 52-week high, surpassing its previous peak of $333.30, which the company reached on October 6th.

The stock outperformed some of its peers, as Labcorp Holdings Inc. rose 0.2% to $323.75, Alnylam Pharmaceuticals Inc. fell 2.4% to $225.10, and Bio-Techne Corp. rose 0.08% to $72.64.

Trading volume totaled 2.7 million, compared to the 50-day average of 946,248.

Data source: Dow Jones Market Data, FactSet

(END) Dow Jones Newswires

October 21, 2026 16:33 ET (20:33 GMT)