A bruised balance sheet, a massive impairment, and a stock down substantially, but one manager has made Avantor its biggest bet.On November 14, Chicago-based Kinney Asset Management disclosed a purchase of 470,000 Avantor shares, increasing its position by approximately $4.52 million, according to a new SEC filing.What HappenedKinney Asset Management reported a net addition of 470,000 shares of Avantor (AVTR +0.04%) in its latest quarterly portfolio update, according to a Securities and Exchange Commission ...