LONDON (Reuters) - London-listed oil company Royal Dutch Shell
Ackermann's departure from Shell is the latest retreat from high-profile corporate positions for the former Deutsche Bank
He stepped down from the supervisory board of German engineering conglomerate Siemens
Shell's annual meeting is scheduled for May 20. The company is holding a management day on March 13, when it will attempt to win round investors after a major profit warning in January.
(Reporting by Sarah Young, Editing by Paul Sandle)