GNMK - GenMark Diagnostics CEO Massarany to depart in shakeup February, 10 2020 06:20 PM GenMark Diagnostics Inc. GenMark Diagnostics (NASDAQ:GNMK) says Hany Massarany has stepped down as President and CEO and as a board member, effective immediately.More news on: GenMark Diagnostics, Inc., Healthcare stocks news, Read more ...