ProPetro Holding Corp. (NYSE:PUMP – Get Free Report)’s stock price fell 5.6% on Tuesday following insider selling activity. The stock traded as low as $9.25 and last traded at $9.27. 439,892 shares traded hands during trading, a decline of 69% from the average session volume of 1,430,960 shares. The stock had previously closed at $9.82. […]