Who is Mike Lynch? A look at the British tech tycoon missing from a sunken yacht in Sicily

Tech tycoon Mike Lynch, one of six people missing from a sunken yacht off Sicily, had been trying to move past a Silicon Valley debacle that had tarnished his legacy as an icon of British ingenuity.

Lynch, 59, struck gold when he sold Autonomy, a software maker he founded in 1996, to Hewlett-Packard for US$11 billion in 2011. But the deal quickly turned into an albatross for him after he was accused of cooking the books to make the sale and fired by HP's then-CEO Meg Whitman.

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He was cleared of criminal charges in the U.S. in June, but still faced a potentially huge bill stemming from a civil case in London. A decade-long legal battle had resulted in his extradition from the U.K. to face criminal charges of engineering a massive fraud against HP, a company that helped shape Silicon Valley's zeitgeist after starting in a Palo Alto, California, garage in 1939.

Lynch steadfastly denied any wrongdoing, asserting that he was being made a scapegoat for HP's own bungling -- a position he maintained while testifying before a jury during a 2 1/2 month trial in San Francisco earlier this year. U.S. Justice Department prosecutors called more than 30 witnesses in an attempt to prove allegations that Lynch engaged in accounting duplicity that bilked billions of dollars from HP.

The trial ended up vindicating Lynch and he pledged to return to the U.K. and explore new ways to innovate.

Although he avoided a possible prison sentence, Lynch still faced the civil case in London that HP mostly won during 2022. Damages haven't been determined in that case, but HP is seeking US$4 billion. Lynch made more than US$800 million from the Autonomy sale.

Before becoming entangled with HP, Lynch was widely hailed as a visionary who inspired descriptions casting him as the British version of Microsoft co-founder Bill Gates and Apple co-founder Steve Jobs.

Lynch, a Cambridge-educated mathematician, made his mark running Autonomy, which made a search engine that could pore through emails and other internal business documents to help companies find vital information more quickly. Autonomy's steady growth during its first decade resulted in Lynch being awarded one of the U.K's highest honours, the Office of the Most Excellent Order of the British Empire in 2006.

In the months leading up to the deal that would go awry, HP valued Autonomy at US$46 billion, according to evidence presented at Lynch's trial.

The trial also presented contrasting portraits of Lynch. Prosecutors painted him as an iron-fisted boss obsessed with hitting revenue targets, even if it meant resorting to duplicity. But his lawyers cast him as entrepreneur with integrity and a prototypical tech nerd who enjoyed eating cold pizza late at night while pondering new ways to innovate.