Joachim Ralph Posener, (born 17 January 1964 in Lidingö) is a Swedish financier and author. Posener is a lawyer by educated who was active in the Swedish finance trade from the late 1980s to the end of the 1990s. He became publicly known in November 1997 after having been accused by the media as being the mastermind behind Lord Moynes acquisition of the Swedish publicly traded company Trustor AB. The company acquisition, which later become known as the Trustor affair eventually ended with one of Lord Moynes "Team" members, , being sent to a prison term. When Swedish police acted against Lord Moyne and his "team" in October 1997 Posener happened to be abroad, and he chose then according to his own statements to not return to Sweden. This became very well publicized in Swedish media and also