*[[JM Foundation]]: $35,000 (2014)
*[[John William Pope Foundation]]: $1,065,000 (1994-2019)
*[[Koch Family Foundations]]: [[Koch_Family_Foundations#Contributions_of_the_Charles_G._Koch_Foundation| $1.9 million]] (1998-2017)
*[[Lynde and Harry Bradley Foundation]]: $1,012,500 (1998-2021)
*[[Mercer Family Foundation]]: $50,000 (2015)