Sierra Oncology Reports First Quarter 2021 Results News provided by Share this article – Topline Data Now Expected in Q1 2022 – SAN MATEO, Calif., May 7, 2021 /PRNewswire/ - Sierra Oncology, Inc. (SRRA), a late-stage biopharmaceutical company on a quest to deliver targeted therapies that treat rare forms of cancer, today reported its financial and operating results for the first quarter ended March 31, 2021. "The first quarter of 2021 has been a hugely productive one for Sierra. We are excited to share that MOMENTUM enrollment has accelerated, and we now anticipate completing enrollment...