Margellos was a founder and partner of the fund management firm IJ Partners, which managed private funds in Switzerland. In 2011,
Panos Kammenos, a member of parliament for New Democracy at the time, had mentioned his name in the case of the
Certificate of deposits of the Postal Savings Bank, which he had categorically denied. The following year, according to the newspaper "To Paron", they claimed him to be his financier party known as "The River". In May 2015, Margellos was sanctioned by
Russia during the
Russo-Ukrainian War when he was named on a list of 89 Europeans that President
Vladimir Putin considered undesirable in Russia. == Death ==