Sydney court proceedings initiated by Atlassian billionaire Mike Cannon-Brookes against his former company secretary Kevin Chiu, for allegedly emailing confidential information about his private companies to his ex-wife Annie, show the division of the couple’s fortune could be getting acrimonious.

There is a lot to unpick when such a wealthy and acquisitive couple split up. This week’s court case featured Mike Cannon-Brookes’ lawyers questioning why Annie and the former finance boss of investment vehicle Cannon-Brookes Services needed details about staff contracts, remuneration and police checks surreptitiously sent to them on Christmas Day.