Bill and Hillary Clinton, along with their nonprofit Clinton Foundation, have established at least five shell companies in Delaware, according to tax filings highlighted on Monday.

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Those companies include two for the couple's personal finances and three for the foundation, according to the documents, which were first reported by the Washington Free Beacon.

All five are filed at 1209 North Orange Street in Wilmington. The address is shared with companies like Google, Apple, Bank of America, Coca-Cola, Ford, General Electric and more than 280,000 others that use the facility to take advantage of the state's tax laws.

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There is nothing illegal about the activity, but the location has come under renewed scrutiny in the wake of last week's finding that a Panamanian law firm helped as many as 140 political leaders around their globe surreptitiously shield their assets using offshore holding corporations. During a campaign stop this week, Clinton said the revelations about the "super-rich" exploiting tax loopholes were "outrageous."

According to the tax filings reported on Monday, the former secretary of state established ZFS Holdings, LLC, at the Wilmington address to process $5.5 million from her book publisher, Simon & Schuster, one week after she left the department 2013. Former president Bill Clinton established WJC, LLC to receive consulting fees in 2008.

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The charitable Clinton Foundation established companies at the address in each of 2009, 2010, and 2013. Those are the Accesso Fund, LLC, the Haiti Development Fund, LLC, and the Accesso Worldwide Fund, Inc.

Delaware is commonly used as a tax haven within the United States because of favorable tax laws.