From his Wikipedia page: Especially in the first decade of the...

From his Wikipedia page: Especially in the first decade of the 21st century, he was considered one of the shareholders in Germany who often asserted their rights and interests by taking legal action. In his free time, he drives international car races. The background to this was takeovers with subsequent squeeze-outs or domination agreements at the expense of the free shareholders. In many cases, the lawsuits led to settlement agreements or decisions by court panels. These provided for higher cash settlements or comparable compensation for the plaintiffs.

According to his own statements, Axel Sartingen has won around 500 million euros from industry for other free shareholders and himself. [39]Recently, Axel Sartingen announced a significant interest (more than 5%, Axel Sartingen > 9%) in Australia-listed Antilles Gold (AAU.ax), one of the company's largest copper/gold exploration companies in Cuba.

Sounds like he will be a perfect partner in the style of AAU executive management. I can't see that style working well with the Cubans.