Biotech Stock Roundup: REGN, MRNA Offer COVID-19 Updates, TBPH Down on Study Update Posted byZacks Equity Research August 26, 2021 Leave a comment on Biotech Stock Roundup: REGN, MRNA Offer COVID-19 Updates, TBPH Down on Study Update Regulatory and pipeline updates from Regeneron (REGN) and Moderna (MRNA), among others have been in focus in the biotech industry over the past week.