Grand Canyon Education, Inc.

Rule 10b5-1 Trading Arrangements

During the quarter ended December 31, 2025, none of our Section 16 directors or officers adopted, modified orterminated a “Rule 10b5-1 trading arrangement” (as defined in Item 408 of Regulation S-K of the Exchange Act).

We have a policy governing transactions in our securities by directors, officers, employees and others which permits these individuals to enter into trading plans complying with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended. Generally, under these trading plans, the individual relinquishes control over the transactions once the trading plan is put into place. Accordingly, sales under these plans may occur at any time, including possibly before, simultaneously with, or immediately after significant events involving our company.

We anticipate that, as permitted by Rule 10b5-1 and our policy governing transactions in our securities, some or all of our directors, officers and employees may establish or terminate trading plans in the future. We intend to disclose the names of executive officers and directors who establish or terminate a trading plan in compliance with Rule 10b5-1 and the requirements of our policy governing transactions in our securities in our future quarterly and annual reports on Form 10-Q and 10-K filed with the Securities and Exchange Commission. We undertake no obligation, however, to update or review the information provided herein, including for revision or termination of an established trading plan, other than in such quarterly and annual reports.