X0306 4 2020-03-10 0 0001378950 U.S. Auto Parts Network, Inc. PRTS 0001388867 Akhavan Houman C/O US AUTO PARTS NETWORK, INC. 16941 KEEGAN AVENUE CARSON CA 90746 0 1 0 0 Chief Marketing Officer Common Stock 2020-03-10 4 A 0 134980 0 A 154980 D Common Stock 2020-03-10 4 A 0 34185 0 A 189165 D Represents the vesting of performance-based restricted stock units previously granted to the Reporting Person by the Company on May 22, 2019 under the Company's annual incentive bonus plan. The performance conditions applicable to the award were determined to have been satisfied by the Company's Board of Directors on March 10, 2020, resulting in the immediate vesting of the restricted stock units as to 154,980 shares. Represents common stock awarded to the Reporting Person upon the determination by the Company's Board of Directors of the achievement of the performance conditions under the Company's annual incentive bonus plan. The common stock was awarded to the Reporting Person in lieu of cash under the Company's annual incentive bonus plan. /s/ Houman Akhavan 2020-03-12