The rich are hiding trillions in wealth.

You’ve probably heard about their offshore bank accounts, shell corporations, and fancy trusts. But this wealth isn’t all sitting in the Cayman Islands or Panama. Much of it’s hiding in plain view: maybe even in your town.

America’s big cities are increasingly dotted with luxury skyscrapers and mansions. These multi-million dollar condos are wealth storage lockers, with the ownership often obscured by shell companies.

In Boston, where I live, there’s a luxury building boom. According to a study I just co-authored, out of 1,805 luxury units — with an average price of over $3 million — more than two-thirds are owned by people who don’t live here.

One-third are owned by shell companies and trusts that mask their ownership. And of these units, 40 percent are limited liability companies (LLCs) organized in Delaware.

Why Delaware?

Criminals around the world set up their shell companies in Delaware, the premiere secrecy jurisdiction in the United States — where you don’t have to disclose who the real owners are. As a result, human traffickers, drug smugglers, and tax evaders all enjoy the anonymous cover of a Delaware company.