Grand Canyon Education Inc

Our 2024 annual report and our Annual Report on Form 10-K for the year ended December 31, 2024, including financial statements, are available electronically along with our Proxy Statement to all stockholders of record as of April 16, 2025, including those stockholders whose shares are held in a brokerage, bank or similar account, who will receive the same mailing from the organization holding the account.** Stockholders who wish to obtain a copy of our Annual Report on Form 10-K, for the fiscal year ended December 31, 2024, and our Proxy Statement may do so without charge by writing to Investor Relations, Grand Canyon Education, Inc., 2600 W. Camelback Road, Phoenix, Arizona 85017.**

As of the date of this Proxy Statement, management knows of no matters that will be presented for determination at the Annual Meeting other than those referred to herein. If any other matters properly come before the Annual Meeting calling for a vote of stockholders, it is intended that the persons named in the proxies solicited by our Board of Directors, in accordance with their best judgment, will vote the shares represented by these proxies.

01 - Brian E. Mueller 04 - Lisa Graham Keegan 02 - Sara Ward 05 - Chevy Humphrey 03 - Jack A. Henry 06 - Kevin F. Warren 1UPX For Against Abstain For Against Abstain For Against Abstain The Sample Company A Proposals — The Board of Directors recommends a vote FOR all the nominees listed. 044JLB 2. To approve, on an advisory basis, the compensation of our named executive officers as disclosed in the Proxy Statement. 3. To ratify the appointment of KPMG LLP as our independent registered public accounting firm for the fiscal year ending December 31, 2025. 1. Election of Directors: For Against Abstain For Against Abstain Please sign exactly as your name(s) appear on the proxy. If held in joint tenancy, all persons must sign. Trustee, administrators, etc., should include title and authority. Corporations should provide the full name of corporation and the title of the authorized officer signing the proxy. Date (mm/dd/yyyy) — Please print date below. Signature 1 — Please keep signature within the box. Signature 2 — Please keep signature within the box. B Authorized Signatures — This section must be completed for your vote to count. Please date and sign below. 2025 Annual Meeting Proxy Card Using a black ink pen, mark your votes with an X as shown in this example. Please do not write outside the designated areas. T IF VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE.T The Board of Directors recommends a vote FOR Proposals 2 and 3. You may vote online or by phone instead of mailing this card. Online Go to www.envisionreports.com/LOPE or scan the QR code — login details are located in the shaded bar below. Your vote matters – here’s how to vote! Votes submitted electronically must be received by 11:00 p.m., Pacific Time, on Monday, June 9, 2025. Save paper, time and money! Sign up for electronic delivery at www.envisionreports.com/LOPE Phone Call toll free 1-800-652-VOTE (8683) within the USA, US territories and Canada

Small steps make an impact. Help the environment by consenting to receive electronic delivery, sign up at www.envisionreports.com/LOPE Notice of 2025 Annual Meeting of Stockholders Grand Canyon Education, Inc. 2600 W. Camelback Road Phoenix, Arizona 85017 Proxy Solicited by the Board of Directors for the Annual Meeting of Stockholders — Tuesday, June 10, 2025 Brian E. Mueller, Daniel E. Bachus, and Sarah S. Collins, or any of them, each with the power of substitution, are hereby authorized to represent and vote the shares of the undersigned, with all the powers which the undersigned would possess if personally present, at the Annual Meeting of Stockholders of Grand Canyon Education, Inc. to be held on Tuesday, June 10, 2025 at 10:30 a.m. Arizona Time or at any postponement or adjournment thereof. THIS PROXY WHEN PROPERLY EXECUTED WILL BE VOTED AS DIRECTED OR, IF NO DIRECTION IS GIVEN, WILL BE VOTED “FOR” EACH OF THE NOMINEES LISTED ON THE REVERSE SIDE OF THIS PROXY CARD AND “FOR” PROPOSALS 2 AND 3. In their discretion, the Proxies are authorized to vote upon such other business as may properly come before the meeting. (Items to be voted appear on reverse side) Grand Canyon Education, Inc. C Non-Voting Items T IF VOTING BY MAIL, SIGN, DETACH AND RETURN THE BOTTOM PORTION IN THE ENCLOSED ENVELOPE.T Change of Address — Please print new address below. Comments — Please print your comments below. Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting of Stockholders to Be Held on June 10, 2025. This proxy statement and our annual report for the year ended December 31, 2024, are available and may be viewed at: www.edocumentview.com/LOPE Annual Meeting of Stockholders Tuesday, June 10, 2025 10:30 a.m. Arizona time Grand Canyon Education, Inc. 2600 W. Camelback Road Phoenix, Arizona 85017