Elaine Tettemer Marshall has an estimated net worth of $15.4 billion in May 2019. This 70-year old billionaire actually owns 15% of the Koch Industries, which is considered as the second largest privately held company in the United States.

Ever since then, Elaine Tettemer Marshall has always made an effort to avoid the public eye. Even before and after the death of her husband, E. Pierce Marshall, Elaine has maintained a low profile. She is not the type of person who go to extravagant social gatherings all the time. In fact, only few people know that she is the daughter in law of the now deceased Anna Nicole Smith.