Awilhelmsen has offloaded a valuable portion of Royal Caribbean Cruises as its owning families reorganise their shareholdings.
The Norwegian investment company said it had sold 4.8 million of the cruise giant's New York-listed shares to an undisclosed financial institution.
At the closing price of $118.22 on Tuesday, the deal would have been worth $567m.
As a result of the transaction, the Arne Wilhelmsen family becomes the sole owner of Awilhelmsen, which together with its affiliates continues to beneficially own 12% of Royal Caribbean.
The deal apparently marks the exit of Margaret Garmann, co-founder Gjert Wilhelmsen's daughter, as a shareholder in Awilhelmsen. According to the Awhilhelmsen website, the company has been 74% owned by the Arne Wilhelmsen family through Awilhelmsen Holding, with Garmann holding the remaining 26% through Gambaco .
"This sale of shares enables Awilhelmsen to complete a transaction with its owning families, while maintaining its significant position as the largest shareholder of RCCL [Royal Caribbean]," said Awilhelmsen chief executive Sigurd Thorvildsen.
Royal Caribbean had earlier said that 4.8 million shares were being offered at between $116.22 and $118.22 each.
Awilhelmsen is a privately owned investment company based in Oslo.
It was established in 1939 and was one of three founders of Royal Caribbean in 1968.
As well as the cruise sector, it has interests in shipping and offshore, property, retail and finance.
In 2015, two Wilhelmsen family companies reduced their stake in Royal Caribbean by transferring 1.43 millon shares in what was described as a $108m gift to other family interests.
At that time Wilhelmsen family companies owned a 15.2% stake worth about $2.54bn, TradeWinds reported.
Eric Martin contributed to this story.
