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
http://mediamattersaction.org/transparency/organization/Allegheny_Foundation/grants
Carthage Foundation
http://mediamattersaction.org/transparency/organization/Carthage_Foundation/grants
Scaife Family Foundation
http://mediamattersaction.org/transparency/organization/Scaife_Family_Foundation/grants
Sarah Scaife Foundation
http://mediamattersaction.org/transparency/organization/Sarah_Scaife_Foundation/grants
Lynde and Harry Bradley Foundation
http://mediamattersaction.org/transparency/organization/Lynde_and_Harry_Bradley_Foundation/grants
David H. Koch Charitable Foundation
http://mediamattersaction.org/transparency/organization/David_H_Koch_Charitable_Foundation/grants
Charles G. Koch Charitable Foundation
http://mediamattersaction.org/transparency/organization/Charles_G_Koch_Charitable_Foundation/grants
Claude R. Lambe Charitable Foundation
http://mediamattersaction.org/transparency/organization/Claude_R_Lambe_Charitable_Foundation/grants
Coors Castle Rock Foundation
http://mediamattersaction.org/transparency/organization/Castle_Rock_Foundation/grants