Gainers
Sigilon Therapeutics (NASDAQ:SGTX) stock rose 15.5% to $1.49 during Monday's after-market session. The market value of their outstanding shares is at $48.1 million.
Gainers
Exterran Corporation (NYSE: EXTN) shares surged 59.7% to close at $4.79 on Monday after the company said it would merge with Enerflex to create a premier integrated global provider of energy infrastructure.
When insiders purchase or sell shares, it indicates their confidence or concern around the company's prospects. Investors and traders interested in penny stocks can consider this a factor in their overall investment or trading decision.