CarParts.com, Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

CARPARTS.COM, INC.

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if other than the Registrant)

Payment of Filing Fee (Check all boxes that apply):

4910 Airport Plaza Dr., Suite 300Long Beach, California 90815

Notice of Annual Meeting of Stockholders

To the Stockholders of CarParts.com, Inc.:

NOTICE IS HEREBY GIVEN that the 2026 Annual Meeting of Stockholders (together with any postponements, adjournments or other delays thereof, the “Annual Meeting”) of CarParts.com, Inc., a Delaware corporation (the “Company”), will be held on May 11, 2026 at 9:00 a.m. Pacific Time. The Annual Meeting will be held virtually, and no physical meeting will be held. In the Annual Meeting, the stockholders of the Company will consider and vote on the following proposals:

At the Annual Meeting, we will also transact such other business, if any, as may properly come before the Annual Meeting.

Only stockholders of record at the close of business on March 13, 2026 are entitled to notice of and to vote at the Annual Meeting. A list of stockholders entitled to vote at the Annual Meeting will be available for inspection at our principal executive offices and will also be available on the virtual meeting website during the Annual Meeting for individuals logged into the Annual Meeting as stockholders.

All stockholders are cordially invited to attend the meeting in person (virtually). Whether or not you attend the Annual Meeting, it is important that your shares and votes are represented. Therefore, I urge you to promptly vote. Instructions for how to vote are contained on the enclosed proxy card. You can submit your vote by phone, via the Internet, or by signing, dating and returning the enclosed proxy card in the enclosed envelope, which requires no postage if mailed in the United States. In order to attend and vote at the Annual Meeting, you must register in advance at least 24 hours prior to the meeting. Please go to the “Attend the Meeting” link at www.proxyvote.com for instructions on registering and attending. If you hold your shares in street name and wish to vote by ballot at the Annual Meeting, you will also need to obtain and present a legal proxy entitling you to vote at the Annual Meeting from the broker, bank or other nominee that holds your shares. Please refer to page 4 of the accompanying proxy statement for further details.

Important Notice Regarding the Availability of Proxy Materials for the Stockholder Meeting to be held on May 11, 2026: This proxy statement and our annual report on Form 10-K for the year ended January 3, 2026 are available at http://carparts.com/investor.

By Order of the Board of Directors

CarParts.com, Inc.

4910 Airport Plaza Dr., Suite 300

Long Beach, California 90815

YOUR VOTE IS VERY IMPORTANT REGARDLESS OF THE NUMBER OF SHARES YOU OWN. ALL STOCKHOLDERS ARE INVITED TO ATTEND THE ANNUAL MEETING IN PERSON (VIRTUALLY) BY REGISTERING AT PROXYVOTE.COM. WHETHER OR NOT YOU PLAN TO ATTEND THE MEETING, WE ENCOURAGE YOU TO READ THIS PROXY STATEMENT AND SUBMIT YOUR PROXY OR VOTING INSTRUCTIONS AS SOON AS POSSIBLE. THIS WILL ENSURE THE PRESENCE OF A QUORUM AT THE MEETING. PLEASE READ THE ATTACHED PROXY STATEMENT CAREFULLY, COMPLETE, SIGN AND DATE THE ENCLOSED PROXY CARD OR VOTING INSTRUCTION FORM AS PROMPTLY AS POSSIBLE AND RETURN IT IN THE ENCLOSED ENVELOPE. IF YOU ATTEND THE MEETING, YOU MAY VOTE IN THE MEETING IF YOU WISH TO DO SO EVEN IF YOU HAVE PREVIOUSLY SUBMITTED YOUR PROXY OR VOTING INSTRUCTIONS.

Table of Contents