Oct 23 (Reuters) - Sumitovant Biopharma Ltd, along with parent Sumitomo Pharma Co Ltd, has entered into a deal to purchase all shares of Myovant Sciences not already owned by Sumitovant for $27 per share, the companies said in a statement on Sunday. (Reporting by Ann Maria Shibu in Bengaluru; Editing by Shailesh Kuber)