The Vanguard Group has extended its interest in Norwegian Cruise Line beyond the $1bn mark at a time other major shareholders have been selling stock.

Vanguard, already the second largest investor in the company, has reported a larger stake of 10.14%, up from around 8% back in April this year.

An SEC filing shows the investor to boast 22,312,533 shares in Norwegian, which are worth $1.08bn