Thomas Ammann, who was working for Japanese bank Mizuho at the time, had access to information on Canon's takeover of the Dutch digital manufacturer.
He has been accused of trading during a 10-month period between February and November 2009 before the takeover was completed the following March, according to The Telegraph.
During a hearing at Westminster Magistrates' Court yesterday (24 August), Ammann was charged with three counts of insider dealing, two counts of encouraging insider dealing and one count of money laundering.
His associates, German student Christina Weckworth, 42, was accused of two counts of insider dealing and one of money laundering while London-based chiropractor Jessica Mang was accused of one count of insider dealing.
None of the accused entered a plea at the hearing and all were bailed until November. Insider trading carries a maximum prison sentence of seven years.
Canon's takeover of Océ was sealed after it secured a 71% stake in the Dutch manufacturer following its €8.60 (£7.80)-per-share offer in March 2010.
The Japanese company had made a €730m cash offer for Océ the previous November, but the deal was hit by opposition from various shareholders.
Former investment banker charged with insider trading during Canon Océ takeover
A former German investment banker has been accused of insider dealing and encouraging his two associates to invest in shares in Océ prior to its acquisition by Canon in 2010.
