Zone Frontier Inc. 8-KCurrent Reports (8-K / ad hoc)

Market for Equity / Stockholders

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers. On September 8, 2026, David Enholm notified the Board of Directors (the “Board”) of Zone Frontier Inc. f/k/a CleanCore Solutions, Inc. (the “Company”) of his resignation as Chief Financial Officer, effective September 11, 2026, in connection with his retirement. Mr. Enholm’s resignation was not the result of any disagreement between Mr. Enholm and the Company on any matter relating to the Company’s operations, policies, or practices. Field: Page; Sequence: 2; Options: NewSection; Value: 1 Field: Sequence; Type: Arabic; Name: PageNo 1 Field: /Sequence Field: /Page SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Date: September 11, 2026 ZONE FRONTIER INC. /s/ Tyler Hassen Name: Tyler Hassen Title: Chief Executive Officer Field: Page; Sequence: 3; Options: Last Field: Sequence; Type: Arabic; Name: PageNo 2 Field: /Sequence Field: /Page Field: Set; Name: xdx; ID: xdx_08B_extensions eJxFjdEKwjAMRb9g/xD6LHOdKLhHh4o4ZQwRX4vLpLg1I61zfpJ/ad0QQyAk955cISZiSxtdI8NlVWRwwqatlUMosEJGc0XvSHf7BPws8KatY2XcsP7AlDyDnlmE86u/D85OWywTiJZTGU3jBUiZzCTkBxF89ZRMpUs0TqsalCkhZ2pZo1P8Gj+cVE+GmteQdEa2mkwCMoxG+Q1xJGM4UqeexHcLWZaKYDJUILZMj9a71r1D8yVhXWPj4+xI/zv4AM0tSl4=