Simon Nixon, the founder of Moneysupermarket.com, cashed in a 3.7% stake of the comparison website on Tuesday – a total of 20 million shares worth 280p each – leaving him with a 12.8% stake.
The latest Sunday Times Rich List estimated that Mr Nixon was worth £945m.
The entrepreneur relocated to Jersey in 2013 and the following year he purchased an ageing 1930s house in St Brelade for £3.6m. He revealed plans to create an £8m luxury home at the site – which has spectacular views over the bay.
Having gained Planning approval, Mr Nixon will demolish the property and spend a further £4.5m creating a three-storey, four-bedroom landmark residence complete with a gym, outside pool and even its own cinema.
The 46-year-old launched Moneysupermarket.com in 1993, after quitting an accountancy course that he said was 'boring', but it was only in 1999 that the project really took off and started making money.
In 2014, Mr Nixon sold shares of the website worth £130m, which at the time was around 11% of the company – leaving him with a 16.6% stake. He had originally floated the website in 2007, banking £100m, and also raised more than £200m by selling off shares in 2013.
JERSEY'S most eligible bachelor is building himself the ultimate pad – an £8 million luxury home with spectacular views over St Brelade's Bay.
The project began when the 46-year-old bought the property named South Prospect, which sits in a two-acre site in Park Estate.
The existing house, which was previously owned by a 92-year-old woman, is being demolished as it is a health and safety risk and Mr Nixon will construct a 12,500 sq ft new property on its footprint.
'It will be a four bedroomed property with a large master bedroom and a large guest room. I don't need a seven bedroomed house,' said Mr Nixon, who also owns property in London, Cornwall, the Lake District, Spain and Barbados.
He added that it would be an eco-friendly design and a property that was 'fit for purpose' on a beautiful site.
The building will be finished in white render with granite cladding and other features will include a triple garage, gym, cinema and an outside pool.
St Helier-based Page Architects have designed the house and other local contractors will carry out structural engineering, extensive landscaping and ecology work.
'It had remained pretty well untouched for the best part of 20 years and could not be renovated. It had become a hazard,' said Mr Nixon
'If I was going to live on an island, I wanted to have a sea view. I like to see the sea,' he said.
The fitness fanatic loves Jersey and has settled quickly into Island life, having made many friends.
Wealth: £945 m
National rank: 120
Source of wealth: Online
Simon Nixon, one of Jersey's newest super-rich residents, made his money as the founder of price comparison website moneysupermarket.com. The 47-year-old can boast the crown of being Jersey's richest resident and he is not far off the top 100 in the Britain. He earned £135 million over the last 12 months and his personal fortune now sits just shy of the magic £1 billion mark.
The Clarke Family
Wealth: £500 m
National rank: 217
Source of wealth: Property
The Clarke family, - who owned developers C Le Masurier - have been involved in a number of high-profile developments in the Island. They can still boast the accolade of being Jersey's richest family despite their half-billion-pound net worth not increasing in the last year.
Wealth: £475 m
National rank: 232
Source of wealth: Oil and diamonds
After suffering losses of more than nearly £200 million to his personal wealth in 2012, Jersey resident Tony Buckingham has enjoyed an upturn in fortunes over the past three years. The Islander has amassed his huge wealth in the dealing of oil and diamonds and was once a partner in the private military company, Executive Outcomes, but has had no involvement with them or any similar businesses since 1999. When he's not making money he enjoys a spot of sailing.
National rank: 389
Source of wealth: Finance
Losing £20 million in 12 months sounds like a bit of disaster. But when you enjoy a wealth in excess of a quarter-of-billion pounds then perhaps it is not too much to fret over. Australian investment banker Graham Tuckwell may have seen his personal fortune fall in the last year but he his still the eighth richest in the Channel Islands. In 2013 he donated AUD $50 million to an Australian University so they could run a scholarship programme.
Wealth: £250 m
National rank: 391
Source of wealth: Finance
There are good years and then there are great years - the type when you get £100 million richer. Brevan Howard hedge fund co-founder James Vernon had a great last 12 months. The multi-millionaire nearly doubled his personal fortune by netting around £100 million pound since the last Rich List was released. He now sits at 391 in the national rankings.
David Crossland and family
Wealth: £200 m
National rank: 476
Source of wealth: Travel, investment
Mr Crossland has owned airlines, stakes in cruise companies and even invested in car sales businesses all after starting out in the travel business at the tender age of sixteen. Now a pensioner, the prolific businessman and his family boast a wealth of £200 million.
Wealth: £122 m
National rank: 789
Source of wealth: Computers
Gordon Crawford made £76 million from sale of London Bridge Software in 2004. He is also involved in CMR, a Cambridge fuel cell company.
Brian DeZille and family
Wealth: £120 m
National rank: 791
Source of wealth: Clothing
Brian DeZille made his fortune from his popular clothes brand, Sweater Shop. The 81-year-old, who has an impressive line of superyachts, rebranded his famous clothes business a number of years ago to 019 Sweater Shop.
Nigel Jagger and family
Wealth: £110 m
National rank: 856
Source of wealth: Computers, fine wine and other
Nigel Jagger appeared on the list in 2014 ranked at number 819 in Britain. He has fallen 47 places to 856 since then but still boasts a fortune of more than £100 million. Mr Jagger and his family picked up £90m when Atlantic Computers was sold in 1987 and they have since diversified into fine wine with Octavian Vaults since.