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March 1, 2013

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1 March 2013

Aureus Mining Inc.

TSX: AUE

AIM: AUE

Aureus Mining Inc.

Total Voting Rights

Aureus Mining Inc. (“Aureus” or the “Company”), the TSX (AUE) and AIM (AUE) listed exploration and development Company focused on gold in sub-Saharan Africa, confirms that, on 1 March 2013, its capital consisted of 221,431,293 common shares with voting rights. On that date, no shares were held in treasury. The total number of voting rights in the Company is, therefore, 221,431,293.

The above figure (221,431,293) may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, Aureus Mining Inc. under the FSA’s Disclosure and Transparency Rules.

Contact Information

Aureus Mining Inc.

David Reading / Jeremy Cave

Tel: +44 (0) 20 7010 7690

RBC Capital Markets (Nominated Advisor and Joint Broker)

Martin Eales / Richard Hughes

Tel: +44 (0) 20 7653 4000

GMP Securities Europe LLP (Joint Broker)

Richard Greenfield / Alexandra Carse

Tel: +44 (0) 20 7647 2800

Buchanan

Bobby Morse / Gordon Poole

Tel: +44 (0) 20 7466 5000

About Aureus Mining Inc.

The Company’s assets include the New Liberty gold deposit in Liberia (the “New Liberty Gold Project” or the “Project”), which has an estimated proven and probable reserve of 910,000 ounces of gold grading 3.3 g/t and an estimated measured and indicated mineral resource of 1,143,000 ounces of gold grading 3.6 g/t and an estimated inferred mineral resource of 593,000 ounces of gold grading 3.2 g/t. A feasibility study has been completed on the Project and construction has commenced with initial earthworks. The Project is expected to have an eight and a half year mine life and annual production of 120,000 ounces for the first five years of production. The Company has financed the Project’s equity funding requirement and is in advanced discussions with interested parties to fund the balance.

The New Liberty Gold Project is located within the Bea Mountain mining licence, which covers 457 km² and has a 25 year, renewable, mineral development agreement. The Bea Mountain mining license also hosts the proximal gold targets of Ndablama, Gondoja and Weaju, which are the focus of exploration programs during 2013. The contiguous Archaen Gold exploration licence, which covers 89 km², is also a focus of exploration for 2013, with Leopard Rock being the main target.

The Company also has gold exploration permits in Cameroon.

Qualified Person

The estimates of mineral resources were calculated in accordance with NI 43-101 and carried out by Chris G Arnold BSc (Hons), MSc, MAusIMM (CP) of independent consultants AMC. The estimated mineral reserve was prepared by Mr M Staples of AMC, a Qualified Person, for the purposes of the study, under the standards set forth by National Instrument 43-101 “Standards of Disclosure for Mineral Project”, of the Canadian Securities Administrators (“NI 43-101″).

Ends