Anawa, a 62-metre custom-designed SeaXplorer, is currently docked at St Peter Port Harbour and is understood to be taking on fuel.
It is owned by Jorge Paulo Lemann, 81, who was born in Brazil but now resides in Switzerland.
Pictured: Dutch boat builders Damen Yachting launched the new SeaXplorer range earlier this year.
Mr Lemann made his wealth in investment banking and is the co-founder of 3G Capital, which has acquired brands such as Burger King, Kraft Foods, Anheuser-Busch and Heinz in the last decade.
The billionaire businessman has a penchant for luxury yachts and Anawa is believed to be his latest acquisition.
It was built by Damen Yachting and has 16 crew, a gross tonnage of 1,850 and a maximum speed of 13.5 knots.
Anawa arrived here at around 06:00 this morning from Vlissingen in the Netherlands.