Lexis Legal founder, David Pardo, has died aged 85.
He was the first person to hold the position at the company, which he founded in 1985.
Pardo was an early investor in Facebook and Twitter and co-founded the UK’s first blockchain firm, the Blockchain Technology Group.
He also co-authored the Oxford Handbook of the Law of Corporations.
His son, Matt, said the news was a huge loss to the company and to the community.
“He was a visionary, a visionary in many ways,” he said.
“We were all very fortunate to have had him at Lexis.”
Pardo worked with Pimco, Credit Suisse, Barclays, IBM and IBM Watson to build Lexis Online, which became the world’s leading online legal resource.
It was acquired by Lexis in 2016 for $1.1bn.
“It is a privilege to have served at Lexus,” Pardo said in a statement.
“Our legal team is deeply saddened by the passing of Mr Pardo.
His contribution to the development of the legal software industry will live on in many respects.”
Lexis is a division of Pimico and has offices in London, Zurich, Tokyo and Singapore.
The firm also has offices at the United Nations, the European Union and the World Health Organization.
It has more than 80 staff, including lawyers, accountants and auditors.
It said the company was “deeply saddened” by Pardo’s death.