Zone Frontier CFO Enholm to retire Sept. 11

Zone Frontier Inc.’s chief financial officer is retiring, with his resignation effective September 11, 2026.

Rhea-AI Filing Summary

Zone Frontier Inc. (ZONE), formerly CleanCore Solutions, Inc., reported that its Chief Financial Officer, David Enholm, has resigned in connection with his retirement. He notified the Board on September 8, 2026, and his resignation will be effective September 11, 2026.

The company states that Enholm’s departure is not due to any disagreement with Zone Frontier on operations, policies, or practices. The filing does not name a successor CFO or describe any changes to the company’s financial policies or strategy associated with this transition.

Positive

• None.

Negative

• Chief Financial Officer retirement: Zone Frontier Inc. disclosed that CFO David Enholm will resign effective September 11, 2026, creating a near-term leadership transition in the company’s finance function.

8-K Event Classification

Item 5.02 — Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers

1 item

Item 5.02 Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers Governance

Key personnel changes including departures, elections, or appointments of directors and executive officers.

Key Figures

CFO resignation notice date: September 8, 2026 CFO resignation effective date: September 11, 2026 Trading symbol: ZONE

3 metrics

CFO resignation notice date September 8, 2026 Date David Enholm notified the Board of his resignation as CFO

CFO resignation effective date September 11, 2026 Effective date of David Enholm’s resignation as CFO

Trading symbol ZONE Common Stock listed on NYSE American LLC

Key Terms

Emerging Growth Company, Section 12(b), principal executive offices

3 terms

Emerging Growth Company regulatory

"Emerging Growth Company"

An emerging growth company is a recently public or smaller public firm that qualifies for temporary, lighter regulatory and disclosure rules to reduce the cost and effort of being public. For investors, it means the company may provide less historical financial detail and face fewer reporting requirements than larger firms, so it can grow more quickly but also carries higher uncertainty—like buying a promising early-stage product with fewer user reviews.

Section 12(b) regulatory

"Securities registered pursuant to Section 12(b) of the Act"

Section 12(b) of the U.S. Securities Exchange Act requires securities listed on a national stock exchange to be registered with the U.S. Securities and Exchange Commission (SEC) and to follow regular public reporting and disclosure rules. For investors, a 12(b) listing generally means more routine financial updates, regulatory oversight and easier buying and selling—like a storefront that must display its inventory and prices, making it simpler to inspect and trade the product.

principal executive offices regulatory

"Address of principal executive offices"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What executive change did ZONE announce on September 8, 2026?

Zone Frontier Inc. announced that its Chief Financial Officer, David Enholm, notified the Board on September 8, 2026 of his resignation in connection with his retirement, with an effective date of September 11, 2026.

Why is ZONE’s Chief Financial Officer resigning?

Zone Frontier Inc. reports that Chief Financial Officer David Enholm is resigning in connection with his retirement. The company states that his resignation is not the result of any disagreement regarding its operations, policies, or practices.

When does the ZONE CFO resignation become effective?

The resignation of Zone Frontier Inc.’s Chief Financial Officer, David Enholm, becomes effective on September 11, 2026, three days after he notified the Board on September 8, 2026.

Did ZONE report any disagreement with the CFO before his resignation?

Zone Frontier Inc. states that Chief Financial Officer David Enholm’s resignation was not due to any disagreement with the company on matters relating to its operations, policies, or practices.

Did Zone Frontier Inc. name a new CFO in this 8-K?

No. The disclosure identifies the resignation and retirement of Chief Financial Officer David Enholm and its effective date but does not name a successor or describe any replacement arrangements.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): September 8, 2026

ZONE FRONTIER INC.

(Exact name of registrant as specified in its charter)

Nevada		001-42033		88-4042082
(State or other jurisdiction of incorporation)		(Commission File Number)		(IRS Employer Identification No.)

5920 S. 118th Circle, Omaha, NE		68137
(Address of principal executive offices)		(Zip Code)

(877) 860-3030

(Registrant’s telephone number, including area code)

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, par value $0.0001 per share		ZONE		NYSE American LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 or Rule 12b-2 of the Securities Exchange Act of 1934.

Emerging Growth Company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

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.

1

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

2

Filing Exhibits & Attachments

3 documents

Other Documents

• EX-101 XBRL SCHEMA FILE 3.0 KB
• EX-101 XBRL LABEL FILE 33.4 KB
• EX-101 XBRL PRESENTATION FILE 21.8 KB