Baystreet Staff - Monday, March 6, 2017 U.S. Auto Parts Network (PRTS) Tumbles on Quarterly Earnings U.S. Auto Parts Network, Inc. (NASDAQ: PRTS) shares fell 3.3% to $3.24, as the company is estimated to post its quarterly earnings at $0.01 per share on revenue of $70.97 million. Share volume was 46,000, compared to an all-day average of 76,000