Tosca Mining Corp to Commence Trading on the United States OTCQX on Friday May 20, 2011

Tosca Mining Corp. (‘Tosca ’ or the ‘Company’)(Pink Sheets: TSMNF) announces that its shares will begin trading on the OTCQX on Friday, May 20, 2011. OTCQX securities are quoted on the OTC Link platform, the third largest U.S. equity trading venue, after the NASDAQ and NYSE. U.S. investors will be able to find the Company’s current financial disclosures, news releases, and real-time level 2 quotes on www.OTCQX.com and www.OTCMarkets.com.

Ron Shenton, President of Tosca Mining explained, “With US investor interest in our Red Hills Copper/Moly project located in Presidio County, Texas, an OTCQX presence provides Tosca with a cost-effective method of accessing US capital markets while allowing current a potential shareholders better access to our company. We would like to thank Merriman Capital, Inc. for guiding Tosca Mining through the upgrade process.”

About the OTCQX

The OTCQX is the most prestigious of the three OTC tiers and is recognized as a quality-controlled marketplace for investor-friendly companies. The OTC market is the world’s largest electronic marketplace for broker-dealers to trade over 10,000 unlisted securities. In 2010, securities on the OTC platform traded over $144 billion in dollar volume.

Tosca Mining Corp. has engaged the services of Merriman Capital, Inc., a wholly-owned subsidiary of Merriman Holdings, Inc. (NASDAQ: MERR), a financial services firm based in San Francisco focused on fast-growing companies and their institutional investors, to serve as the Company’s Principal American Liaison (“PAL”) on OTCQX, responsible for providing guidance on OTCQX requirements. Merriman Capital, Inc. is a member of FINRA and SIPC.

Tosca Mining Corp.

Tosca Mining is focused on exploration and development of mining properties in North and South America. The Company’s goal is to acquire properties that are advanced and can be brought to the development stage within a short time frame. The Company relies on its directors' expertise and previous successes in exploration and mine development. The headquarters of the company is located in Vancouver, Canada, and its wholly-owned subsidiary, Red Hills Mining Corp., is located in Marfa, Texas.

Please visit Tosca Mining’s website – www.toscamining.com for additional information.

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