Factbox: How Bloomberg could wall off his billions if he became president

former New York City Mayor Michael R. Bloomberg arrives at Gala Dinner on the occasion of the World Mayors Summit in Christiansborg in Copenhagen, Denmark October 10, 2019. Ritzau Scanpix/Martin Sylvest via REUTERS ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. DENMARK OUT. NO COMMERCIAL OR EDITORIAL SALES IN DENMARK.

(Reuters) - The disclosure by former New York City Mayor Michael Bloomberg that he is considering entering the race for the 2020 U.S. Democratic presidential nomination has raised questions about how the billionaire business owner would disentangle himself from the business he founded and runs.

Bloomberg, 77, is the controlling owner and chief executive officer of Bloomberg L.P, a financial information and media firm. Forbes ranks Bloomberg as the eighth richest American with an estimated worth of $53.4 billion.