Board-level discussions on Rickenbacher's future are ongoing, the source added, speaking on the condition of anonymity.

Rickenbacher did not immediately respond to requests for comment. A spokesperson for Julius Baer declined to comment.

Reuters could not immediately establish how Rickenbacher may be replaced.

(Reporting by Oliver Hirt and Noele Illien; additional reporting by Elisa Martinuzzi. Editing by Tommy Reggiori Wilkes)

By Oliver Hirt and Noele Illien