British tech entrepreneur Mike Lynch and his 18-year-old daughter Hannah were also on the yacht.
Morgan Stanley International chairman Jonathan Bloomer is among the missing after a yacht capsized off the coast of Sicily during a heavy storm.
Salvatore Cocina, head of Sicily's civil protection agency, said Bloomer and Chris Morvillo, a lawyer at Clifford Chance, were also among the missing.
The British-flagged 56-metre sailing vessel Bayesian was carrying 22 people and was anchored just off the coast near Porticello harbor when it was hit by the tornado in the early hours of August 19, a statement from the Italian coastguard said, the Guardian reported. ".
One person, believed to be the vessel's cook, has been confirmed dead. The coast guard reported that the missing were people of British, American and Canadian nationalities.
Fifteen people were rescued, including Lynch's wife, Angela Bacares, who owns the boat, and a 1-year-old girl who was rescued by her mother.
A spokesman for Mr. Lynch, co-founder of Autonomy, a software firm that has become one of the brightest lights on the British tech scene, declined to comment on the incident. Survivors claim the trip was arranged by Lynch for his colleagues.
Described as Britain's Bill Gates, Lynch has spent much of the past decade defending his name in court against allegations of fraud related to the sale of his software firm Autonomy to US technology company Hewlett-Packard for $11 billion.
In June, Lynch, 59, was acquitted by a San Francisco jury after serving more than a year under house arrest.
Hours after news of the yacht's sinking, it emerged that his co-accused in the trial, Stephen Chamberlain, had died after being hit by a car while jogging in Cambridgeshire.
Chamberlain, a former vice president of finance at Autonomy, was hit Saturday morning and is on life support.
On August 19, divers were trying to reach Bayesian's hull. The boat sank about 49 meters and the prosecutor's office in Termini Imerese is investigating the incident.
"The wind was very strong. Bad weather was expected, but not of this magnitude," said a coastguard official in the Sicilian capital, Palermo.
The captain of a nearby boat said that when the wind picked up, he turned on the engine to maintain control of his vessel and avoid colliding with the Bayesian, which was anchored alongside.
"We managed to keep the boat in place and after the storm passed we noticed that the yacht behind us was gone," said Carsten Borner.
Borner's crew found some of the survivors on a life raft — including a little girl and her mother — and took them aboard before the Coast Guard picked them up. | BGNES
