Billionaire Wealth Hits Record $15.1tn as $6.6tn Succession Wave Approaches

The world's billionaire population reached a record 3,795 individuals in 2025 as collective wealth rose to $15.1 trillion, according to Altrata's Billionaire Census 2026.

Billionaire numbers increased by 8.2% year on year, the strongest expansion in five years.

Their combined wealth grew even faster, increasing 12.8%.

Artificial intelligence was among the major forces behind that rise as the valuations of technology businesses exposed to the AI investment boom increased substantially.

For the private-wealth industry, however, the report points to a second development that may ultimately be even more consequential: an approaching transfer of trillions of dollars between generations.

A $6.6 trillion transition

Altrata estimates that approximately $6.6 trillion of billionaire wealth will transfer over the next decade.

Almost 5,000 direct heirs — spouses and adult children — are expected to receive substantial wealth.

The scale of that transition will place succession, family governance and the preparation of inheritors at the centre of private-wealth planning.

Managing an inheritance of this magnitude involves far more than transferring ownership.

Families may need to decide how businesses are governed, how investment mandates evolve, how decision-making is shared between generations and what role philanthropy plays in the family's long-term purpose.

Women will receive a significant share

Women are expected to account for a substantial proportion of beneficiaries, including the overwhelming majority of spousal heirs identified by Altrata.

That has implications for an industry historically built around relationships with predominantly male wealth creators.

Private banks, family offices and advisers increasingly need relationships with the wider family rather than only the individual who originally created the wealth.

A succession strategy that begins only when an estate transfers may already be too late.

Wealth is becoming more concentrated

Altrata also found that wealth concentration at the very top of the billionaire population has increased markedly.

The world's 29 billionaires with fortunes above $50 billion accounted for 27.2% of total billionaire wealth in 2025.

That compares with 7.2% in 2017.

Technology wealth has played an important role in that concentration, particularly as equity valuations have increased around artificial intelligence and related sectors.

Globally mobile families

Around one in five billionaires lives outside their country of birth, according to the report.

London is particularly international: Altrata reports that approximately 60% of billionaires living in the city were born overseas.

For advisers, that mobility introduces additional layers of complexity across tax, residency, citizenship, ownership structures and succession.

The Billionaire Census therefore presents two sides of the same private-wealth story.

Technology and capital markets continue to create extraordinary new fortunes.

At the same time, enormous pools of established wealth are moving towards generational transition.

The institutions that serve wealthy families will increasingly need to manage both.