X0306 4 2020-06-04 0 0001378950 U.S. Auto Parts Network, Inc. PRTS 0001761840 Peker Lev 2050 W. 190TH STREET, SUITE 400 TORRANCE CA 90504 1 1 0 0 Chief Executive Officer Common Stock 2020-06-04 4 S 0 50000 8.27 D 388105 D Common Stock 38869 I By IRA Common Stock 56000 I By Spouse's IRA The shares were sold in multiple transactions at prices ranging from $8.20 to $8.32. The price reported above reflects the weighted-average price. The Reporting Person undertakes to provide to the staff of the Securities and Exchange Commission, the Issuer, or any security holder of the Issuer, upon request, full information regarding the number of shares sold at each separate price within the range set forth herein. The Reporting Person disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein. /s/ Lev Peker 2020-06-04