 Shares of Talis Biomedical Corp. TLIS, 2.34 bounced 1.9 in midday trading Monday, after the diagnostic testing company requested a withdrawal of a large share offering by a selling shareholder. After the March 15 closing bell, the company had registered 37.49 million common shares for sale, including 7.63 million common shares and 29.86 million shares issuable after the conversion of convertible preferred stock, by entities affiliated with Baker Bros. 