Jim Ratcliffe, the founder of chemicals group INEOS, is the richest person in the UK on the latest figure we could verify, £29.6 billion in May 2023, ahead of Sir Leonard Blavatnik at $26.5 billion in April 2025. This list ranks the biggest UK-based fortunes, using filings where a company is public and dated reported figures where it is private.
| Rank | Name | Wealth |
|---|---|---|
| 1 | Jim Ratcliffe | £29.6 billion (May 2023) |
| 2 | Sir Leonard Blavatnik | $26.5 billion (April 2025) |
| 3 | Lakshmi Mittal and family | about $20 billion |
| 4 | The Hinduja family | reported £19 billion (2013) |
| 5 | Denise Coates | $8.1 billion (September 2026) |
| 6 | Hugh Grosvenor, 7th Duke of Westminster | £9 billion at inheritance (2016) |
1. Jim Ratcliffe: £29.6 billion (May 2023)
Sir Jim Ratcliffe founded INEOS in 1998 and is its chairman and CEO. He was the richest person in the UK in 2018 at £21.05 billion, and moved his tax residence to Monaco in 2020. Since 2024 he has also been involved in the ownership of Manchester United.
Basis: INEOS is private, so we keep the reported May 2023 figure with its date and have not found a newer verified one.
2. Sir Leonard Blavatnik: $26.5 billion (April 2025)
Len Blavatnik is a British-American businessman whose Access Industries owns Warner Music Group. His early fortune came from the TNK-BP oil joint venture, which Rosneft bought out in 2013 for $28 billion in cash for its 50% stake, after his group took $19 billion in dividends.
Basis: the April 2025 reported estimate, kept with its year, since Access’s current ownership share of Warner Music Group is not confirmed from the filing.
3. Lakshmi Mittal and family: about $20 billion
Lakshmi Mittal is executive chairman of ArcelorMittal, the world’s second-largest steelmaker, and lives in London. A trust for the benefit of Mr and Mrs Mittal holds 335,930,950 ArcelorMittal shares.
Basis: those 335,930,950 shares times the October 23, 2026 close of $59.43 gives about $20 billion. The family later agreed to sell some shares back to the company in March 2026, so the figure is slightly high.
4. The Hinduja family: reported £19 billion (2013)
Gopichand Hinduja (1940 to 2025) was co-chairman of the Hinduja Group, with a brother, Srichand, who died in 2023. The brothers were long named among the wealthiest people in the UK. Gopichand died on November 4, 2025.
Valuation: the only figure we could verify is a 2013 estimate of £19 billion ($24.7 billion), kept with its year.
5. Denise Coates: $8.1 billion (September 2026)
Denise Coates founded bet365, where she is majority shareholder and joint CEO. She owns around half of the company, and has taken most of her income as salary. She was the highest-paid woman executive in the world in 2018.
Source of figure: the September 2026 estimate, since bet365 is private.
6. Hugh Grosvenor, 7th Duke of Westminster: £9 billion at inheritance (2016)
Hugh Grosvenor inherited the title and control of the Grosvenor Estate in 2016, when it was estimated at £9 billion. The wealth is held in a trust, of which he is a beneficial owner and chair of trustees but not the legal owner.
Method: the 2016 inheritance figure, kept with its year, since the trust’s assets have moved since.
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Who is the richest person in the UK?
On the latest figure we could verify, Sir Jim Ratcliffe at £29.6 billion in May 2023.
How much is Lakshmi Mittal worth?
About $20 billion, based on 335,930,950 ArcelorMittal shares held in a family trust at $59.43 on October 23, 2026.
Who is Len Blavatnik?
A British-American businessman whose Access Industries owns Warner Music Group, estimated at $26.5 billion in April 2025.
Why do some figures carry old dates?
Private-company fortunes are not recalculated in real time, so we keep the latest verified figure with its date.
Who from the old list is missing?
Alisher Usmanov, Ernesto Bertarelli and the Reubens are not included because we could not verify current figures.
How we estimate net worth
Our estimates are based on public reporting, company valuations, and deal and earnings figures all compiled in an internal valuation model. They are approximate, and figures change over time as new information emerges.
For this list we used a company filing for share counts, a dated closing price, and dated reported figures for private companies.
Last updated: October 2026.
