18 August 2015 – U.S. Oil & Gas plc – GXG Markets Closure

U.S. Oil & Gas Plc.

(“US Oil” or the “Company”)

GXG Markets Closure

U.S. Oil & Gas Plc (GXG London: USOP, OTC New York: USOPY), the oil and gas exploration company with assets in Nevada, makes the following announcement:

On August 17 2015, GXG Markets communicated that it is voluntarily
relinquishing its Danish market operator licenses and is terminating its
agreements with issuing companies. With effect from 17.00 CET on 18 August 2015, investors in US Oil & Gas will, therefore, no longer be able to trade in the Company’s securities on GXG Markets.

The Board of US Oil & Gas deeply regrets the inconvenience caused to
shareholders by these developments and wishes to repeat its assurance that all steps are being taken to list on another regulated exchange. The Board has been working intensively to this end and expects a positive outcome in due course.

The Board wishes to emphasise that various aspects of the admissions process are not under the Company’s direct control, therefore a timeline for listing cannot be offered at this point. However, the board is making every effort to expedite the process in the interests of the Company and shareholders.

THE DIRECTORS OF THE COMPANY ACCEPT RESPONSIBILITY FOR THE CONTENTS OF THIS ANNOUNCEMENT

Neither this announcement nor the information contained herein constitutes an offer or solicitation by U.S. Oil and Gas plc for the purchase or sale of any securities nor does it constitute a solicitation to any person in any
jurisdiction where solicitation would be unlawful.

For further information contact:

Brian McDonnell, Chief Executive Officer +353 (1) 631 9022
Alexander David Securities Ltd – Corporate Finance Adviser
David Scott +44 (0) 20 7448 9820
James Dewhurst +44 (0) 20 7448 9820
Email: james.dewhurst@ad-securities.com

ADR Broker Desk, Deutsche Bank

United Kingdom

Simon Davies and Richard Willis
Tel: +44 (0) 20 7547-6500
Fax: +44 (0) 20 7547-9995
E-mail: adr@db.com

USA

###