Rishi Sunak and his wife Akshata Murty are now richer than the King, after his personal fortune increased by more than £120million over the last year.
Their combined wealth increased from £529million last year to £651million, finances which are largely derived from Murty's stake in Infosys.
Her shares in the Indian IT company, founded by her father, grew in value by £108.8 million to nearly £590 million for the year.
Sunak is the wealthiest occupant of No 10 Downing Street in its history, with the duo sitting at number 245 on the list.
When asked about the figures, the Prime Minister’s deputy spokesman said the public should "judge him by his actions" not his wealth.
He said: “He’s been asked about this before and we’d always point people to the actions that he takes to support people.
“When he’s been asked this question before, he’s responded that people should judge him by his actions, such as providing support during the pandemic. That’s his focus and his priority and he should be judged on that.”
King Charles also saw his wealth grow this year, increasing to £610 million from £600 million.
The list also showed that the number of British billionaires fell again this year.
The figure peaked at 177 in 2022, before dropping to 171 in 2023. It fell again this year to 165.
Robert Watts, who compiled the list, said: “This year’s Sunday Times Rich List suggests Britain’s billionaire boom has come to an end.
"Many of our home-grown entrepreneurs have seen their fortunes fall and some of the global super rich who came here are moving away.
“Thousands of British livelihoods rely on the super-rich to some extent.
“We’ll have to wait and see whether we have now reached peak billionaire, and what that means for our economy.”
In 2022, the then justice secretary Dominic Raab said it is "fantastic” that Sunak had joined the Sunday Times Rich List.
He said: “He’s a fantastic example of someone who’s been successful in business, who’s coming to make a big impact in public service.
“I think we want more of those people. I think it’s fantastic that you’ve got someone of British-Indian origin, showing all people in our country that you can get to the top of politics.
“And frankly, I think if I understood correctly, the Sunday Times Rich List was a reflection of not just him but his wife.
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"His wife is an incredibly successful entrepreneur in her own right.
"Again someone that’s here, British-Indian, and actually I think we want to see more women succeeding in both business and politics."
