Gainers
• Organovo Holdings, Inc. (NASDAQ:ONVO) shares increased by 12.0% to $0.33 during Tuesday's pre-market session.
Losers
• Co-Diagnostics, Inc. (NASDAQ:CODX) stock declined 8.7% to $2.74 during Tuesday's pre-market session.
• OpGen, Inc. (NASDAQ:OPGN) shares decreased by 5.7% to $2.14.