Julia Koch and her three children inherited a 42% stake in Koch Industries from her husband, David, who died in August 2019 at age 79. An Iowa native, Koch moved to New York City in the 1980s and worked as an assistant to fashion designer Adolfo. She worked with many of his high-profile clients, including First Lady Nancy Reagan. Julia met David via a blind date in 1991; they ran into each other again six months later, began dating and got married in 1996. With her late husband, she donated $10 million to Mount Sinai Medical Center and $10 million to Stanford Children’s Hospital to study food allergies.