U.S. Auto Parts Network (PRTS)

Our Annual Reports on Form
10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and amendments to those reports are available free of charge on the Investor Relations section of our corporate website located at www.usautoparts.net as soon as reasonably
practicable after such reports are electronically filed with, or furnished to, the Securities and Exchange Commission (“SEC”). The inclusion of our website address in this report does not include or incorporate by reference into this
report any information on our website.

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Table of Contents

Our business is subject to a
number of risks, some of which are discussed below. Other risks are presented elsewhere in this report and in the information incorporated by reference into this report. You should consider carefully the following risks in addition to the other
information contained in this report and our other filings with the SEC, including our subsequent reports on Forms 10-Q and 8-K, and amendments thereto, before deciding to buy, sell or hold our common stock. The risks and uncertainties described
below are not the only ones facing our company. Additional risks and uncertainties not presently known to us or that we currently believe are not important may also impair our business operations. If any of the following risks actually occur, our
business, financial condition or results of operations could be materially adversely affected, the value of our common stock could decline and you may lose all or part of your investment.