Bernard Arnault has taken a personal equity stake in Cartier parent company Richemont, according to people familiar with the French billionaire’s investments. It’s unclear exactly how much of a shareholding the LVMH chairman and chief executive officer has acquired in Cie Financiere Richemont SA. It was described by one of the people as “small” and part of a broader Arnault family-owned portfolio of investments in publicly listed companies. Arnault currently intends to hold the stock only as an investment, said the person, asking not to be named talking about confidential matters. News of Arnault’s shareholding in Richemont, which is controlled by South African billionaire Johann Rupert, was revealed as part of a wider profile of the businessman, published in Bloomberg Businessweek.