5. Gran Tierra Energy ( GTE) is a Canada-based upstream energy company with oil and gas properties in Colombia, Argentina and Brazil.

For the second quarter of 2011, the company reported production of 18,141 boe/d, increasing 36% due to additional production from recent discoveries and existing fields. Revenue and other income increased 93% to $162 million. Net income nearly doubled to $31.6 million during the quarter.

Higher production ensured healthy operating cash flow of $64 million over $50 million reported in the same quarter prior year. Cash and cash equivalents were $211.4 million. Management estimates capital expenditure during 2011 to amount to $357million, with $190 million allocated towards drilling, $87 million for seismic acquisition and $79 million for infrastructure.

Following the acquisition of Petrolifera, management expects 2011 production to average between 17,500 to 19,000 boe/d. Analysts surveyed by Bloomberg expect the stock to gain 57% over the next one year. The stock has 88% buy rating.

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