Charles River up after M&A rumblings

Charles River Laboratories International Inc. (NYSE:CRL) gained $0.91 to $34.82 on Thursday after media reports surfaced that shareholders Relational Investors and California State Teachers' Retirement System are pushing Charles River to sell itself. Relational owns about 5.6% of Charles River, while CalSTRS owns about 0.5%. Charles River and Relational declined to comment. CalSTRS could not be reached for comment. ...