Orosur Mining Inc. to Commence Trading on the Toronto Stock Exchange (TSX)

SANTIAGO, Chile, May 14, 2012 – Orosur Mining Inc. ("OMI" or the "Company") (TSX: OMI) (AIM: OMI), the South American-focused gold producer and explorer, announces that the common shares of the Company will be listed and posted for trading at the opening on Monday May 14, 2012 on the TSX under the symbol “OMI”.  The Company will be listed as an exempt issuer on the TSX and will therefore be exempt from the reporting requirements of Section 501 of the TSX Manual.

An application has been granted for the original listing in the Mining category of 81,800,896 common shares, of which 77,979,809 shares are issued and outstanding and 3,821,087 shares are reserved for issuance.

On March 29, 2000, the common shares of the Company were admitted for listing on The Canadian Venture Exchange Inc. (“CDNX”), a predecessor to the TSX Venture Exchange. In June 2002, the CDNX was acquired by the TSX as a wholly owned subsidiary. Accordingly the name of the CDNX was changed to the TSX Venture Exchange (“TSXV”), where the Company’s common shares trade under the symbol “OMI”. On December 15, 2004, the common shares of the Company were admitted for listing on the AIM Market of the London Stock Exchange (“AIM”) where they trade under the symbol “OMI”. The common shares will be delisted from TSXV on Monday May 14, 2012 upon commencement of trading on TSX.


About Orosur Mining Inc.
Orosur Mining Inc. is a fully integrated gold producer and exploration company focused on identifying and developing gold projects in Latin America. The Company operates the only producing gold mine in Uruguay (San Gregorio), and has assembled an exploration portfolio of high quality assets in Uruguay and Chile.

Forward Looking Statements and Cautionary Language

This news release may contain certain information that constitutes forward-looking statements. Forward-looking statements are frequently characterized by words such as "plan," "expect," "intend," "believe," "anticipate" and other similar words, or statements that certain events or conditions "may" or "will" occur. Forward-looking statements are based on the opinions and estimates of management at the date the statements are made, and are subject to a variety of risks and uncertainties and other factors that could cause actual events or results to differ materially from those projected in the forward-looking statements. These factors include the inherent risks involved in the exploration and development of mineral properties and other factors described above and in the Company's most recent annual information form under the heading "Risk Factors" which has been filed electronically by means of the Canadian Securities Administrators' website located at The Company disclaims any obligation to update or revise any forward-looking statements if circumstances or management's estimates or opinions should change. The reader is cautioned not to place undue reliance on forward-looking statements.

Neither 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.

For further information, please contact:

Orosur Mining Inc
David Fowler, CEO
Ignacio Salazar, CFO + 56 2 9246800;

Canaccord Genuity Limited (Nominated Adviser & Broker)
+44 (0) 20 7523 8000
Rob Collins
Andrew Chubb

Blythe Weigh Communications (Investor Relations)
Tim Blythe: +44 (0) 7816 924626
Susan Mckenzie: + 44 (0) 7919 050828
Robert Kellner: +44 (0) 7800 554377

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