Singapore-based KoGuan, who has a $13.2 billion fortune, according to the Bloomberg Billionaires Index, began investing in Nvidia in March. shareholder Leo KoGuan expressed support for Jensen Huang on Friday and said he won’t increase his stake in the tech company with someone else at the helm.“No further investment without Jensen,” KoGuan said in a text message, saying he’s invested around $1.3 billion in Nvidia.