Sana Biotechnology Inc. (NASDAQ:SANA) is one of the most promising penny stocks under $5 to buy. On February 17, Sana Biotechnology appointed Brian Piper as Executive Vice President and Chief Financial Officer. Brian Piper joined the company with over 25 years of biopharmaceutical experience, most recently serving as CFO of Scorpion Therapeutics and its spin-off, Antares Therapeutics. His background includes significant leadership roles at Prelude Therapeutics, Aevi Genomic Medicine, and a 13-year tenure a ...