21 June, 2010 – US Oil and Gas plc – Holding(s) in Company update

U.S. Oil and Gas plc

(the “Company”)

Holding(s) in Company

The Company today received notification that SVS Securities plc (“SVS”) disposed of 817,000 ordinary shares of €0.0001 each in the Company (“Ordinary Shares”) on 18 June 2010. As a result of this, SVS no longer has a substantial shareholding in the Company. SVS’ interest relates to a legal and beneficial holding.

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

—ENDS—

For further information contact:

US Oil and Gas plc

Brian McDonnell, Chief Executive Officer+353 (0) 872383419

[email protected] This e-mail address is being protected from spambots. You need JavaScript enabled to view it

SVS Securities plc – PLUS Corporate Adviser

Peter Ward / Alexander Brearley+44 (0)20 7638 5600

SVS Securities plc – Broker

Ian Callaway / Alex Mattey+44 (0)20 7638 5600

Conduit PR

Jonathan Charles +44 (0)20 7429 6611

[email protected] This e-mail address is being protected from spambots. You need JavaScript enabled to view it +44 (0)7791 892509

Notes to Editors

US Oil and Gas plc is a PLUS (Ticker: USOP) listed oil and gas exploration company with a strategy to identify and acquire oil and gas assets in the early phase of the upstream life-cycle and mature them into marketable opportunities for the medium- and large-sized oil companies. The Company’s main asset is in Nye County, Nevada where it holds the entire share capital of the US-based company Major Oil International LLC. Major Oil has acquired, and intends to acquire, rights to exploration and development acreage in two high potential resource areas in Hot Creek Valley, Nye County, adjacent to the oil and gas rich Railroad Valley area of Nevada, both of which are part of the Sevier Thrust of central Nevada and western Utah, USA.

For further information please refer to our website at: www.usoil.us

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