Gran Tierra Energy Inc. (NYSE: GTE ) is an oil exploration and production company with assets in Colombia and Ecuador. It is headquartered in Calgary, Alberta but incorporated in Delaware. It trades on the NYSE American, and also on the Toronto Stock Exchange and I am a UK-based long-only investor with a strategy which revolves around finding companies which can be multi-baggers over a 5-10 year time horizon, though, as a great man once said, my favourite holding period is forever. I am looking for companie ...