Total Exxon Network
Scaife Aggregate $521,477,117 $141,336,040 Scaife Family Foundation recently broke away from Scaife Foundations. 
Lynde & Harry Bradley Foundation $583,162,647 $71,745,993
Koch Aggregate $151,321,081 $39,833,858
Coors Castle Rock Foundation $33,164,113 $9,230,760
Total $1,289,124,958 $262,146,651
Media Transparency links for checking the grants of foundations are below:
Allegheny Foundation
Carthage Foundation
Scaife Family Foundation
Sarah Scaife Foundation
Lynde and Harry Bradley Foundation
David H. Koch Charitable Foundation
Charles G. Koch Charitable Foundation
Claude R. Lambe Charitable Foundation
Coors Castle Rock Foundation