Biotech Stock Roundup: BDSI Surges on Merger Deal, SGEN Down on Outlook & More Posted byZacks Equity Research February 16, 2022 Leave a comment on Biotech Stock Roundup: BDSI Surges on Merger Deal, SGEN Down on Outlook & More Merger updates from BioDelivery (BDSI) and Seagen (SGEN) earnings results are among a few key highlights from the biotech sector during the past week.