Macarthur Minerals Limited
TSX VENTURE : MMS
OTCQX : MMSDF

Macarthur Minerals Limited

June 22, 2011 07:12 ET

Macarthur Minerals Joins OTCQX

VANCOUVER, BRITISH COLUMBIA--(Marketwire - June 22, 2011) -

THIS NEWS RELEASE IS NOT FOR DISTRIBUTION TO UNITED STATES SERVICES OR FOR DISSEMINATION IN THE UNITED STATES

Macarthur Minerals Limited (TSX VENTURE:MMS)(OTCQX:MMSDF) ("the Company" or "Macarthur") is pleased to announce that it has joined the highest tier of the OTC marketplace, OTCQX International.

Investors can find current financial disclosure and Real-Time level 2 quotes for the Company on www.otcqx.com and www.otcmarkets.com.

"Companies use OTCQX to expand their access to investors, engage them with quality disclosure of their financials, and provide trading transparency to stimulate liquidity," said R. Cromwell Coulson, President and Chief Executive Officer of OTC Markets Group. "We are pleased to welcome Macarthur Minerals to OTCQX."

Stifel, Nicolaus & Company, Incorporated will serve as the Company's Principal American Liaison ("PAL") on OTCQX, responsible for providing guidance on OTCQX requirements.

Macarthur trades in the United States on OTCQX under the symbol "MMSDF".

ABOUT OTC MARKETS GROUP INC

OTC Markets Group Inc. (OTCQX:OTCM) operates the world's largest electronic marketplace for broker-dealers to trade unlisted stocks. OTC's Link™ platform supports an open network of competing broker-dealers that provide investors with the best prices in over 10,000 OTC securities. In 2010, securities on the OTC Link traded over $144 billion in dollar volume, making it the third largest U.S equity trading venue after NASDAQ and the New York Stock Exchange. OTC categorize the wide spectrum of OTC-traded companies into three tiers – OTCQX (the quality-controlled marketplace for investor friendly companies), OTCQB® (the U.S reporting company marketplace for development stage companies), and OTC Pink™ (the speculative trading marketplace) – so investors can identify the level and quality of information companies provide. To learn more about how OTC Markets Group make the unlisted markets more transparent, informed and efficient, visit www.otcmarkets.com.

ABOUT MACARTHUR MINERALS LIMITED (TSX VENTURE:MMS)(OTCQX:MMSDF)

Macarthur Minerals Limited, is a Perth, Australia based resource development company that is currently focused on developing its Lake Giles Iron Ore project, located in the Yilgarn iron ore district in Western Australia. The Lake Giles project is located 110Km from rail with direct access to the Port of Esperance, Western Australia. The project has a resource of 1.3 billion tonnes of Magnetite mineralization that has been reported in accordance with National Instrument 43-101, and 18 million tonnes of potential Direct Shipping Ore (DSO) Goethite/Hematite at 55.5% Fe.

Further information on Macarthur Minerals Limited and technical reports on the Lake Giles project can be found on the company's website www.macarthurminerals.com or www.sedar.com.

On behalf of the Board of Directors,

MACARTHUR MINERALS LIMITED

Alan Phillips, President, Chairman & CEO

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 OR THIS RELEASE

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