J. Howard Marshall net worth: J. Howard Marshall is an American businessman who has a net worth of $100 million dollars. J. Howard Marshall, also known as James Howard Marshall III was born in Los Angeles, California. He was involved in a lengthy court battle with his father and brother over their involvement with the Koch Brothers. J. Howard Marshall III, supported William Koch, Jr., while his father and brother supported Charles Koch. The Koch Brothers were in the midst of William Koch's attempt to take over Charles Koch within Koch Industries, Inc. J. Howard Marshall subsequently agreed to sell his stake in Koch Industries. However, after his father passed away, he went after his brother, E. Pierce Marshall in court, claiming that his brother had stolen from him. A jury later ruled in favor of E. Pierce Marshall, and subsequently found J. Howard Marshall guilty of fraud. His father was married to Anna Nicole Smith, and both J. Howard Marshall and Anna Nicole Smith were denied access to his nearly $2 billion fortune. J. Howard Marshall is currently the President and Owner of MDH Industries.