East Anglia’s richest person saw her wealth increase by £1.408billion in the last year, according to the new edition of The Sunday Times Rich List which is published at the weekend.
Kirsten Rausing - a member of the Jockey Club who runs two stud farms in Suffolk - tops the list with a personal wealth of £12.256bn.
The increase puts more than £10bn between her and her nearest competition in the region.
The Swedish-born 66-year-old has bred the last two winners of the Hong Kong Cup, Time Warp and Glorious Forever racing to victory in 2017 and 2018 respectively.
They were bred at Mrs Rausing's Lanwades stud in Newmarket, and are among 1,600 winners she has had in the past 20 years.
However, Mrs Rausing's wealth stems not from horses but from packaging. Ruben Rausing, Kirsten's grandfather, founded the Tetra Pak packaging giant in 1951, which became Tetra Laval under the guidance of his sons, Gad, Kirsten's father, and Hans Rausing.
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Jon Hunt, 65, who owns Heveningham Hall, near Halesworth, remains second, but his total wealth of £1.4bn did not increase from last year.
Having co-founded estate agent Foxtons in 1981, Mr Hunt sold the business for £375m in 2007, a commercial success repeated last year with the sale of his Cannon Green office block netting him £120m.
The Earl of Iveagh has had a good year and remains the third richest in East Anglia, up £51m this year.
The family estate at Elveden Hall in Suffolk is home of the biggest lowland farm in the UK, producing mainly potatoes and onions.
Lord Iveagh, 49, who is better known as Ned, leads the Guinness family and their Burhill Group organisation, which operates 22 golf courses.
In Norfolk, the highest ranking for Norfolk was Robert Carter and family. Their construction business has helped them to amass a fortune of £175m, placing them 27th in East Anglia.
This was down one place on last year, but the family had made an extra £5m.
It's been a disastrous season on the pitch for Ipswich Town with relegation to League One, but owner Marcus Evans saw no change in his personal fortune of £800m.
The businessman, 55, who originally hails from Walsham-le-Willows, near Bury St Edmunds, founded his company Marcus Evans in 1983 and took over the Blues in 2007.
This week he wrote to fans who have purchased a season ticket for the 2019/20 campaign saying he truly believes the club can repay fans with "entertaining and winning football".
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Joining the Town owner with a fortune of £800m - up £70m from last year - is David and Patricia Thompson, owners of Cheveley Park Stud in Newmarket.
Alfie Best, who created Best Holdings, Europe's largest residential mobile home park operator, is up £35m this year to £285m and 14th place on the list.
The firm runs the 49-year-old's Wyldecrest Parks brand, an Essex-based company owning 75 holiday and caravan parks, and reported £143.5m in net assets, up more than £100m on the previous year.
Entering the regional top 20 this year are James and Selina Hopkins, ranked 13th with an increase in wealth of £108m, according to the list.
Mr Hopkins, 59, owns the Suffolk-based housebuilder Hopkins Homes with wife Selina, 45. The firm is valued at £275m, and saw assets rise by nearly £26m to £116.1m in 2017-18.
Another new entry is Sir Michael Marshall, edging into 20th place with a £226m fortune, up £76m from last year.
The Marshall empire dates back to 1909, encompassing aerospace, car dealing and property, and the family has a 77% stake in the Cambridge airport-based business worth nearly £193m.
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Robert Watts, compiler of The Sunday Times Rich List, said: "Although two famous dynasties feature in the top three places in our East Anglia Rich List, the days when the Sunday Times Rich List is dominated by aristocrats and inherited wealth has gone.
"We're seeing more self-made men and women - often from humble roots. East Anglia's wealthiest people include a proud Romany gypsy who was born on the side of a road, someone who grew up in Blitz-ravaged London and a former 'pony boy' who worked on London Underground tube lines.
"We're also finding wealth made in more diverse ways. Industry, finance and property are no longer the only route into the rich list. Vast fortunes are now being built from software, television and baby products."
The 2019 Sunday Times Rich List is published on Sunday, May 12 and charts the wealth of the 1,000 richest people in the UK.
The list is based on identifiable wealth, including land, property, other assets or significant shares. It excludes bank accounts.
Richest people in East Anglia 2019
? 1: Kirsten Rausing - £12.256bn, up £1.408bn
? 2: Jon Hunt - £1.4bn, no change
? 3: The Earl of Iveagh and the Guinness family - £973m, up £51m
? 4: Douw Steyn and family - £900m, no change
? 5=: Marcus Evans - £800m, no change
? 5=: David and Patricia Thompson - £800m, up £70m
? 7: Mike Lynch - £469m, no change
? 8: Mark Burnett and Roma Downey - £390m, no change
? 9: Mark Creasey - £387m, up £32m
? 10: Ray O'Rourke and family - £337m, up £31m
? 11: Paul Day and family - £325m, up £30m
? 12: Jonathan Milner - £315m, up £15m
? 13: James and Selina Hopkins - £293m, up £108m
? 14: Alfie Best - £285m, up £35m
? 15: Edward Atkin and family - £267m, no change
? 16=: Michael Gooch and family - £250m, no change
? 16=: Andrew Hill and family - £250m, up £57m
? 16=: Gordon Sanders and family - £250m, up £50m
? 19: Bill, Tim and Pollyanna Gredley and family - £241m, up £24m
? 20: Sir Michael Marshall and family - £226m, up £76m
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