Orosur Mining Inc

Net Asset Value • Sep 17, 2013

National Storage Mechanism | Additional information

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Orosur Mining Inc. (the "Company") (TSX:OMI) (LSE:OMI) informed today that on 13 September, 2013, the Company’s Chairman, Mr. John Walmsley has purchased 140,350 shares in the Company (“Common Shares”) at GB£ 0.1425 (equivalent to C$ 0.23) per share, through his spouse.

Following this purchase, Mr. Walmsley has a beneficial interest in 140,350 Common Shares (such shares being held by Mr. Walmsley’s spouse), representing 0.18 per cent of the Company’s issued share capital.

About Orosur Mining Inc.

Orosur Mining Inc. is a fully integrated gold producer and exploration company focused on identifying and developing gold projects in South 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. The Company is quoted in Canada (TSX: OMI) and London (AIM: OMI).

For more information please visit www.orosur.ca

Orosur Mining Inc

Ignacio Salazar, + 562 2924 6800

Chief Executive Officer

[email protected]

or

Cantor Fitzgerald Europe

Stewart Dickson / Jeremy Stephenson, +44 (0) 20 7894 7000