TORONTO, ONTARIO, Jun 04 (MARKET WIRE) —
U3O8 Corp. (TSX VENTURE: UWE), a Canadian-based company focused on
uranium exploration and resource expansion in South America, is pleased
to announce the appointment of John Ross as Chief Financial Officer,
effective June 4.

John is a Chartered Accountant with over 25 years of experience in the
financial management of Canadian publicly listed exploration and mining
companies operating in South America, Africa and Canada. Previously, he
served as Chief Financial Officer of Colossus Minerals Inc. (an advanced
explorer in Brazil), Cronus Resources Ltd. (a gold explorer in Mexico,
recently amalgamated with Continental Gold Limited), FNX Mining Company
(a nickel and precious metal producer in the Sudbury Basin), and IAMGold
Corp. (a gold producer with operations in Africa and exploration in
Ecuador, Brazil and Argentina). John started his career in the mining
industry at Rio Algom Limited. John was instrumental in FNX Mining’s
transition from an exploration to a development company and he
contributed to IAMGold’s development into an intermediate gold producer.
He also implemented IAMGold’s decision to convert its cash to gold
immediately prior to the sustained increase in the gold price.

U3O8 Corp. wishes to thank Carmelo Marrelli for his contribution as Chief
Financial Officer and helping the company progress from inception to
become a leading, advanced exploration company.

In association with Mr. Ross’ appointment, 150,000 stock options have
been granted pursuant to the company’s stock option plan at an exercise
price of $0.24 per share and will expire on June 3, 2015.

About U3O8 Corp.

U3O8 Corp. is a Toronto-based exploration company, focused on uranium
exploration and resource expansion in South America – a promising new
frontier for uranium exploration and development. U3O8 Corp. has one of
the most advanced portfolios of uranium projects in the region comprising
NI 43-101 compliant resources in Guyana to significant historic resources
in Colombia and near-resource and discovery potential in Argentina.

Additional information on U3O8 Corp. is available on the company’s web
site at www.u3o8corp.com.

Forward-Looking Statements

Certain information set forth in this news release may contain
forward-looking statements that involve substantial known and unknown
risks and uncertainties. These forward-looking statements are subject to
numerous risks and uncertainties, certain of which are beyond the control
of U3O8 Corp., including, but not limited to, the impact of general
economic conditions, industry conditions, volatility of commodity prices,
risks associated with the uncertainty of exploration results and
estimates and that the resource potential will be achieved on exploration
projects, currency fluctuations, dependence upon regulatory approvals,
and the uncertainty of obtaining additional financing and exploration
risk. Readers are cautioned that the assumptions used in the preparation
of such information, although considered reasonable at the time of
preparation, may prove to be imprecise and, as such, undue reliance
should not be placed on forward-looking statements.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as
that term is defined in the policies of the TSX Venture Exchange) accepts
responsibility for the adequacy or accuracy of this release.

Contacts:
U3O8 Corp.
Nancy Chan-Palmateer
Vice President, Investor Relations
(416) 868-1491
nancy@u3o8corp.com

U3O8 Corp.
Richard Spencer
President & CEO
(416) 868-1491
richard@u3o8corp.com

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