Ken Griffin's $238 million New York City penthouse isn't the only pied-à-terre he owns. See what else is in his portfolio.

Tech Insider : Business
Ken Griffin speaks at The Cambridge Union.
Citadel CEO Ken Griffin has a real estate portfolio totaling over $1 billion.

Nordin Catic/Getty Images for The Cambridge Union

I build homes for billionaires. Here are 5 features my ultrawealthy clients request — and what I tell them not to do.

Tech Insider : Business, Style
A rendering of the back of a luxury home.
Manny A. Varas builds homes for the ultrawealthy and highlighted some trends that luxury homebuyers are looking for.

MV Group

This $115-million French Normandy Château in Florida features a private spa and a go-kart track. See inside.

Tech Insider : Business, Sports, Style
An aerial view of a large residential compund.
A property in the Tampa area is asking $115 million, which would shatter the area's current sales record.

Luxhunters / Eddy Martinez & Roland Ortiz with ONE Sotheby's International Realty

See the lavish homes 5 billionaires are selling — and why it could be tough for them to find buyers

Tech Insider : Business, Style
aerial view of pritzker estate
One of the largest homes in the country is still on the market.

Anthony Barcelo

Miami heat: Phones are ringing off the hook as California billionaires look to drop 9 figures on homes in the 305

Tech Insider : Business, Crypto, Economy
Mark Zuckerberg, Larry page, Sergey brin with a Miami backdrop
Google cofounder Larry Page purchased two properties in Miami for $170 million. Mark Zuckerberg and Sergey Brin may be next.

Jeff Bottari/Getty; Jeff Chiu/AP, Christopher Polk/Getty; Getty Images; Tyler Le/BI

How millions are trapped in modern-day slavery at sandstone quarries in India

Tech Insider : Business, Style

Millions of sandstone quarry workers in India breathe toxic dust that causes a terminal lung disease called silicosis.

Here's the pitch deck that Pacaso, a luxury vacation home startup, used to crowdfund $72 million from 17,500 investors

Tech Insider : Business, Technology
Pacaso was founded by Zillow co-founder CEO Spencer Rascoff and Austin Allison, former CEO of dotloop
Pacaso was founded by Zillow co-founder CEO Spencer Rascoff (left) and Austin Allison, former CEO of dotloop.

Pacaso

Home saunas are becoming the ultimate status symbol for wealthy homeowners

Tech Insider : Business, Sports
Sauna door

Cassidy Araiza for BI

The most expensive ZIP code in America is a Miami island you can only reach by yacht or ferry

Tech Insider : Business, Style
An aerial view of Fisher Island, Florida
Fisher Island, Florida, topped Realtor.com's recent listing of ZIP codes with the highest home prices in the US.

Danny Lehman/Getty Images

7 ways you're making your home look cheap, according to a luxury interior designer

Tech Insider : Business, Environment, Style
A small living area with a couch, side table, dining table, and cahirs.
Cluttered spaces and matching furniture can cheapen your space.

Maren Winter/Getty Images/iStockphoto

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