Supplement to Proxy

GAMESTOP CORP. 625 Westport Parkway Grapevine, Texas 67051 SUPPLEMENT TO PROXY STATEMENT FOR THE 2018 ANNUALMEETING OF STOCKHOLDERS TO BE HELD ON JUNE 26, 2018 This Supplement is dated May 31, 2018 and provides updated information with respect to the 2018 Annual Meeting of Stockholders (the “Annual Meeting”) of GameStop Corp. (the “Company” or “GameStop”) to be held on June 26, 2018 at 1:00 p.m., Central Daylight Time, at the Hilton Southlake Town Square located at 1400 Plaza Place, Southlake, Texas, 76092. This Supplement should be read in conjunction with the Company’s Notice of the 2018 Annual Meeting of Stockholders and Definitive Proxy Statement for the Annual Meeting, which was filed with the Securities and Exchange Commission (the “SEC”) on May 16, 2018. Appointment of Chief Executive Officer and Promotion of Chief Financial Officer to Dual Role of Chief Operating Officer and Chief Financial Officer On May 31, 2018, the Board of Directors (the “Board”) of GameStop Corp. approved organizational changes to the Company’s senior executive team. Specifically, the Board appointed Shane S. Kim as interim Chief Executive Officer, succeeding Daniel A. DeMatteo, who had assumed the position of interim Chief Executive Officer on May 9, 2018. Mr. DeMatteo was initially appointed interim Chief Executive Officer on May 9, 2018 following the resignation of the Company’s previous Chief Executive Officer as a temporary measure until the Board determined the new organizational changes, given Mr. DeMatteo’s history with the Company and prior experience as interim CEO. Mr. DeMatteo will remain Executive Chairman and a director and Mr. Kim will also remain a director. Prior to his appointment as interim Chief Executive Officer, Mr. Kim, who served on the Audit Committee and Compensation Committee, resigned from each of these committees. In addition, on May 31, 2018, the Board appointed Robert A. Lloyd, currently the Company’s Chief Financial Officer, to the additional position of Chief Operating Officer. The changes to the Company’s senior executive ranks during 2018 have significantly increased the demands on the Company’s continuing senior executives and have made it imperative for the Company to ensure the continuity and stability of its leadership. With this in mind, the Board undertook the organizational changes described above. In connection with these changes, the Board (or its Compensation Committee, where appropriate, after consulting with its independent compensation consultant), implemented the compensation changes described below, with the goal of retaining key executives and avoiding the disruption that would be caused by further changes in the Company’s senior executive ranks. Compensation Arrangement for Mr. Kim On May 31, 2018, in connection with the appointment of Mr. Kim as interim Chief Executive Officer, the Company and Mr. Kim entered into a letter agreement that provides for Mr. Kim to receive a base salary at an annualized rate of $1,500,000 per year. In the event that (i) a change in control of the Company were to occur prior to May 31, 2019 and (ii) Mr. Kim’s employment were to be terminated by the Company without cause or Mr. Kim were to resign with good reason following the change in control but prior to May 31, 2019, Mr. Kim would be entitled to receive any base salary that he would have received had he remained employed until May 31, 2019, provided he executes a general release of claims in favor of the Company and its affiliates. The letter agreement provides for Mr. Kim to receive a one-time grant of restricted stock pursuant to the Company’s Amended and Restated 2011 Incentive Plan (the “Incentive Plan”) with a fair market value of $1,500,000 on the date of grant. The restricted stock will vest on May 31, 2019, subject to Mr. Kim’s continued service through such date, whether as an employee, director or other service provider. In the event that Mr. Kim were to cease to provide services to the Company or its affiliate prior to May 31, 2019 due to (i) a termination by the Company without cause, (ii) death or (iii) a disability, the restricted stock would then vest, provided he (or his personal representative or estate, if applicable) executes a release.