Tethys Petroleum Lists on London Stock Exchange



July 25, 2011

Tethys Petroleum Lists on London Stock Exchange

GRAND CAYMAN, CAYMAN ISLANDS--(Marketwire - July 25, 2011) - Tethys Petroleum Limited ("Tethys Petroleum" or the
"Company") (TSX:TPL)(LSE:TPL) announces that its entire issued ordinary share capital has been admitted to the standard
category of the Official List of the Financial Services Authority and have commenced trading on the main market of the
London Stock Exchange under the ticker symbol "TPL". Depository interests, representing Tethys Petroleum ordinary
shares, have been admitted to CREST. Shareholders wishing to trade securities in the Company electronically on the
London Stock Exchange can trade depository interests representing Tethys Petroleum ordinary shares in CREST.

The primary listing for the ordinary shares of the Company will continue to be the Toronto Stock Exchange in Canada and
the Company will continue to retain its secondary listing on the Kazakhstan Stock Exchange.

The Company is not raising any funds or issuing any new shares in connection with its listing in London and,
accordingly, the interests of existing shareholders of the Company will not be diluted as a result of Admission. There
will remain 260,629,769 ordinary shares of the Company in issue.

Dr David Robson, Chairman, President and Chief Executive Officer of Tethys Petroleum commented: "Our listing on the main
LSE exchange represents a further major stage in the development of our company and will, we believe draw attention to
our progress to UK and international investors."

Tracey Pierce, Director of Equity Primary Markets at London Stock Exchange Group, said: "We are delighted to welcome
Tethys to the London Stock Exchange's Main Market today. This listing will give the company exposure to the world's most
international market and to an unrivalled source of liquidity and new investors. Tethys' admission to the Exchange
reinforces London's attractiveness to companies which have global reach and ambitions."

Tethys is focused on oil and gas exploration and production activities in Central Asia with activities currently in the
Republics of Tajikistan, Kazakhstan and Uzbekistan. This highly prolific oil and gas area is rapidly developing and
Tethys believes that significant potential exists in both exploration and in discovered deposits.

Important Information

This announcement does not constitute an offer or invitation to any person to subscribe for or purchase any securities
in the Company or any other entity.

This announcement constitutes an advertisement within the meaning of the Prospectus Rules of the Financial Services
Authority, is not a prospectus and has been prepared solely in connection with Admission. Investors should not acquire
ordinary shares in the Company except on the basis of information contained in the Prospectus published by the Company
in connection with Admission. The Prospectus has been submitted to the National Storage Mechanism and will be available
for inspection at http://www.hemscott.com/nsm.do. A copy of the prospectus is also available on SEDAR at
http://www.sedar.com and on Tethys Petroleum's Website at http://www.tethyspetroleum.com.


Tethys Petroleum Limited
Sabin Rossi
Vice President Investor Relations
+1 416 572 2065
+1 416 572 2201 (FAX)
[email protected]


Tethys Petroleum Limited
TD Canada Trust Tower
161 Bay Street, 27th Floor
Toronto M5J 2S1, Canada
Mobile site: http://m.tethyspetroleum.com


In London:
Veronica Zhuvaghena
Vice President Corporate Communications
+44 207 821 6128
+44 207 821 0612 (FAX)


In Asia-Pacific:
Quam IR
Anita Wan, Associate Director
+ (852) 2217-2999
+ (852) 2217-2999 (FAX)
[email protected]

Tethys Petroleum Limited