Deceased philanthropist and heiress Huguette Marcelle Clark has an estimated net worth of $5 billion. Most of her wealth comes from her family's Clark copper business.

Huguette Clark is actually the daughter of industrialist and former U.S. senator William Clark. She was known to distrust outsiders which already include her family in fear that they were only after her wealth. An artist and musician, her last photograph available today was taken in 1930. Since her mother's death in 1963, she was rarely seen in public and social gatherings. She only had a couple of friends primarily due to her trust issues.

Huguette Marcelle Clark was born on June 9, 1906 in Paris, France. She married William MacDonald Gower in 1928. The couple eventually divorced in 1930. Huguette Clark died on May 24, 2011 at age 85. After her death, her wealth was distributed to charities, goddaughter, employees, attorney and longtime nurse.