Tilman Fertitta is the richest Houstonian, according to Forbes. Courtesy photo

The world’s richest people are wealthier now than they've ever been, and more billionaires have made it onto the 2025 World's Billionaires List than ever before, according to Forbes. This year, 18 Houston-based billionaires are among the richest people in the world, with hospitality honcho Tilman Fertitta leading as the richest Houstonian.

Fertitta, 67, ranked No. 220 overall with an estimated net worth of $11.3 billion, which steadily increased from his 2024 net worth of $9.4 billion.

In addition to owning the Houston Rockets, the busy billionaire owns Texas-based hospitality and entertainment corporation Landry's, and he authored a book about business leadership in 2019. He most recently was nominated as the new United States ambassador to Italy by President Donald Trump.

Ranking 248th overall is oil and gas chairmanRichard Kinder. Forbes estimates his net worth at $10.6 billion, up from $8.1 billion in 2024.

Kinder cofounded pipeline giant Kinder Morgan in 1997, and stepped down as CEO in 2015, though he still retains his seat as chairman of the board. The company is the largest energy infrastructure firm in the U.S., Forbes says, and it owns 79,000 miles of pipeline.

New to the 2025 list is Perry Homes executive chair Kathy Britton, whose company has built over 65,000 homes across the U.S., according to Forbes. Her late father, Bob Perry, founded Perry Homes in 1967. Britton ranked No. 1408 with an estimated net worth of $2.6 billion.

Mercedes-Benz mega-dealer Joe Agresti is another newbie to the list, ranking No. 2790 with a net worth of $1.1 billion. He owns Dream Motor Group with former football coach Nick Saban.

14 additional Houston-area billionaires that made Forbes 2025 world’s richest list are:

  • Houston pipeline heir Randa Duncan Williams: ranked No. 307 with an estimated net worth of $9.3 billion, up from $7.7 billion in 2024. Fellow pipeline heirs Dannine Avara and Milane Frantz tie for 311th nationally. Each has an estimated net worth of $9.2 billion, up from $7.6 billion. Scott Duncan ranks No. 329 with a $9 billion estimated net worth, up from $7.6 billion in 2024.
  • Houston oil tycoon Jeffery Hildebrand: ties for No. 411; $7.7 billion, down from $12.6 billion
  • Toyota mega-dealer Dan Friedkin: ties for No. 411; $7.7 billion, up from $6.4 billion
  • Houston Texans owner Janice McNair and family: No. 561, $6.2 billion, up from $5.6 billion
  • Energy exploration chief exec George Bishop: No. 717, $5 billion, up from $3.2 billion (based in The Woodlands)
  • Westlake Corporation co-owners Albert Chao, James Chao and their families:tied for No. 902, $4 billion, down from $4.9 billion
  • Hedge fund honcho John Arnold: No. 1266, $2.9 billion, down from $3.3 billion
  • Houston Astros owner Jim Crane: No. 1513, $2.4 billion, unchanged from 2024
  • Former Houston Rockets owner Leslie Alexander: tied for No. 1850, $1.9 billion, unchanged from 2024
  • Frontier Airlines chairman William Franke: No. 2623, $1.2 billion, down from $1.3 billion

Elsewhere in Texas, Austin-based billionaire Elon Musk topped Forbes' list as the world's richest person in 2025. The Tesla and SpaceX founder knocked French luxury goods magnate Bernard Arnault down to second place this year.

Forbes declared Musk the first person to reach the $300 billion status. His current net worth stands at $342 billion, which is a staggering $147 billion more than his 2024 net worth.

"It’s another record-breaking year for the world’s richest people, despite financial uncertainty for many and geopolitical tensions on the rise," said Forbes senior editor of wealth Chase Peterson-Withorn. "And, from Elon Musk to Howard Lutnick and the other billionaires taking over the U.S. government, they’re growing more and more powerful."

In Dallas-Fort Worth, Walmart heiress Alice Walton became the wealthiest woman in the world in 2025. Forbes declared Walton's net worth at $101 billion, which is $28.7 billion more than her 2024 net worth of $72.3 billion. She is now one of 15 individuals to claim 12-figure fortunes, also known as the "$100 Billion Club."

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Axiom Space-tested cancer drug advances to clinical trials

mission critical

A cancer-fighting drug tested aboard several Axiom Space missions is moving forward to clinical trials.

Rebecsinib, which targets a cancer cloning and immune evasion gene, ADAR1, has received FDA approval to enter clinical trials under active Investigational New Drug (IND) status, according to a news release. The drug was tested aboard Axiom Mission 2 (Ax-2) and Axiom Mission 3 (Ax-3). It was developed by Aspera Biomedicine, led by Dr. Catriona Jamieson, director of the UC San Diego Sanford Stem Cell Institute (SSCI).

The San Diego-based Aspera team and Houston-based Axiom partnered to allow Rebecsinib to be tested in microgravity. Tumors have been shown to grow more rapidly in microgravity and even mimic how aggressive cancers can develop in patients.

“In terms of tumor growth, we see a doubling in growth of these little mini-tumors in just 10 days,” Jamieson explained in the release.

Rebecsinib took part in the patient-derived tumor organoid testing aboard the International Space Station. Similar testing is planned to continue on Axiom Station, the company's commercial space station that's currently under development.

Additionally, the drug will be tested aboard Ax-4 under its active IND status, which was targeted to launch June 25.

“We anticipate that this monumental mission will inform the expanded development of the first ADAR1 inhibitory cancer stem cell targeting drug for a broad array of cancers," Jamieson added.

According to Axiom, the milestone represents the potential for commercial space collaborations.

“We’re proud to work with Aspera Biomedicines and the UC San Diego Sanford Stem Cell Institute, as together we have achieved a historic milestone, and we’re even more excited for what’s to come,” Tejpaul Bhatia, the new CEO of Axiom Space, said in the release. “This is how we crack the code of the space economy – uniting public and private partners to turn microgravity into a launchpad for breakthroughs.”