1 Charles & David Koch
2 Michael Bloomberg
3 Tom Steyer
4 Sheldon Adelson
5 George Soros
6 Rupert Murdoch
7 Bill and Melinda Gates
8 John and Laura Arnold
9 Penny Pritzker
10 Warren Buffett
11 Peter Thiel
12 Mark Zuckerberg
13 Jeff and MacKenzie Bezos
14 Pierre and Pamela Omidyar
15 Paul Singer
16 Peter G. Peterson
17 Marc Andreessen
18 Donald Trump
19 Alice Walton