Dune Oil Announces New OTC Trading Symbol “DUNXF”, Non-Brokered Private Placement Update, and Conference Attendance

September 15, 2026 – Vancouver, British Columbia – Dune Oil Corp. (“Dune” or the “Company”) (CSE: DUNE) (OTCQB: DUNXF) (Frankfurt: Z62) is pleased to announce its new OTC symbol ‘DUNXF’, the closing of additional funds under its private placement and conference attendance.

Symbol Change in US: DUNXF

Effective September 14, 2026, the Company’s common shares began trading on the OTCQB market under the new symbol ‘DUNXF’. The Company’s CSE symbol (DUNE) and Frankfurt symbol (Z62) are unaffected. The change is administrative, does not affect the Company’s name, business or corporate structure, and requires no action by shareholders; existing share certificates will not need to be exchanged.

Private Placement Update

The Company also announces that, further to its previously announced non-brokered private placement, it has closed an additional tranche. The gross proceeds from this tranche are approximately CAD$252,500, consisting of units at CAD$0.25 per unit for gross proceeds of CAD$252,500 and CAD$220,000 of outstanding debt settled with an arms-length party with the issuance of 153,333 units. Each unit is comprised of one common share and one-half of one share purchase warrant; each whole warrant is exercisable at CAD$0.25 per share for a period of one year from the date of issuance.

The securities issued in connection with this tranche are subject to a hold period until December 26, 2026 and January 15, 2027, in accordance with applicable securities laws and the policies of the Canadian Securities Exchange. The offering remains subject to applicable approval of the CSE. Proceeds from the offering will fund the Company’s ongoing work program on the M47 oil exploration block, investor-relations activities, expenses, and general working capital and corporate purposes.

ArcStone-Kingswood Growth Summit

The Company will participate in the 3rd Annual ArcStone-Kingswood Growth Summit on September 16, 2026, in Toronto. Management will discuss the Company’s M47 oil exploration project, planned milestones and growth strategy, and participate in one-on-one investor meetings. https://www.arcstoneglobal.com/this-event/growth-summit-2026

About Dune Oil Corp.

Dune Oil Corp. is a Canadian oil exploration company focused on Türkiye. The Company has an agreement to earn up to a 29% working interest in the M47 oil exploration block, comprising the C3 and C4 licences in the Cudi-Gabar petroleum province of southeastern Türkiye. The earn-in includes funding a total of US$15 million for 2026 and 2027 work commitments. More information may be found on SEDAR+ and the Company’s website at www.duneoil.ca.

Contact

Scott Lower, President, Chief Executive Officer
1-778-819-1585
E-mail: info@duneoil.ca
Website: www.duneoil.ca

Cautionary Statement Regarding Forward-Looking Information

This news release contains forward-looking information within the meaning of applicable securities laws. Forward-looking information is based on management’s current expectations and assumptions and is subject to risks and uncertainties that could cause actual results to differ materially. The Company does not undertake any obligation to update forward-looking information except as required by law.

The securities referred to herein will not be, or have not been, registered under the United States Securities Act of 1933, as amended, and may not be offered or sold in the United States absent registration or an applicable exemption from registration requirements.