Here's your Forbes Daily Briefing for Tuesday, December 16th.

Today on Forbes, Indonesia's 50 Richest 2025,

wealth crosses $300 billion amid stock market frenzy.

Data Center billionaires climb into the top 10.

In what was a volatile year, Indonesia's benchmark stock index shot up 17%, helping lift collective

wealth to a record $306 billion from $263 billion last year.

To attract investors, the country's financial regulator plans to raise in stages the minimum free-float

requirement for listed companies to 25% from 7.5%.

Brothers R. Bouti and Michael Hartoano remain at number one, a position they have held for over

a decade, although their combined net worth fell by $6.5 billion to $43.8 billion

in what was the biggest wealth decline in dollar terms this year. Shares of Bank Central Asia,

their biggest asset, dropped 15% from a year ago amid investor concerns about the impact

of monetary and fiscal policy uncertainty

on banks.

Petrochemicals and energy billionaire Projogo Pangestu, who raised over $140 million from the

July IPO of Chandra Daya and Vestazi, an infrastructure subsidiary of his listed Chandra-Aastri-specific,

retained the second spot after increasing his net worth by 23% to $39.8 billion.

Overall, the fortunes of half of those on the list were up.

The biggest dollar jump, $9.4 billion, was recorded by the Ouija family, who scaled one

spot to number three with $28.3 billion.

Shares of their infrastructure and energy flagship, Dionne Swastatica Centosa, more than doubled

from a year ago, amid its expansion in renewable energy.

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