Gamco Investors INC. ET AL raised its position in QuidelOrtho Co. (NASDAQ:QDEL – Get Rating) by 2.0% during the 4th quarter, according to its most recent filing with the Securities and Exchange Commission (SEC). The firm owned 194,746 shares of the company’s stock after purchasing an additional 3,792 shares during the quarter. Gamco Investors INC. […]