| Sierra Club | — | CA | 20041014 | $1.1M |
| Sierra Club | — | CA | 20040826 | $875K |
| Sierra Club | N/A · N/A | CA | 20031130 | $781K |
| Sierra Club | N/A · N/A | CA | 20040728 | $697K |
| Sierra Club | — | CA | 20021016 | $555K |
| Herbert Sandler | Golden West Financial & World Savings Bank · CEO | CA | 20040907 | $509K |
| Louise Gund | Self-employed · Photographer | CA | 20040922 | $500K |
| Sierra Club | N/A · N/A | CA | 20031231 | $441K |
| Sierra Club | N/A · N/A | CA | 20130819 | $351K |
| America Votes | — | DC | 20041027 | $340K |
| Sierra Club | N/A · N/A | CA | 20031031 | $296K |
| Sierra Club | N/A · N/A | CA | 20201015 | $294K |
| Sierra Club | N/A · N/A | CA | 20140723 | $288K |
| Sierra Club | N/A · N/A | CA | 20140820 | $270K |
| Sierra Club | N/A · N/A | CA | 20140626 | $265K |
| Sierra Club | N/A · N/A | CA | 20140905 | $263K |
| Jeanne Levy-Hinte | Self-employed · Writer | NY | 20040921 | $250K |
| Sierra Club | N/A · N/A | CA | 20140417 | $250K |
| Linda Pritzker | Investor | TX | 20041011 | $250K |
| Sierra Club | N/A · N/A | CA | 20141009 | $248K |
| Sierra Club | N/A · N/A | CA | 20171003 | $241K |
| Sierra Club | N/A · N/A | CA | 20140919 | $224K |
| Sierra Club | N/A · N/A | CA | 20140829 | $214K |
| Sierra Club | N/A · N/A | CA | 20181023 | $200K |
| Sierra Club | N/A · N/A | CA | 20180823 | $200K |
| Sierra Club | N/A · N/A | CA | 20140709 | $196K |
| Sierra Club | N/A · N/A | CA | 20140926 | $178K |
| John Hunting | Retired | MI | 20040907 | $150K |
| Sierra Club | N/A · N/A | CA | 20191001 | $150K |
| Sierra Club | N/A · N/A | CA | 20130730 | $149K |
| Donald Sussman | Information Requested · Information Requested | CT | 20041109 | $120K |
| Stephen Schutz | SPS Studios · Publishing | CA | 20040903 | $100K |
| John Hunting | N/A · retired | MI | 20040120 | $100K |
| Guy Saperstein | N/A · Retired | CA | 20040301 | $100K |
| Louise Gund | Self-employed · Philanthropist | CA | 20021016 | $100K |
| Peter Lewis | Information Requested · Information Requested | OH | 20041108 | $100K |
| John Hunting | N/A · Retired | MI | 20040225 | $100K |
| Sierra Club | N/A · N/A | CA | 20190424 | $100K |
| Sierra Club | N/A · N/A | CA | 20030731 | $89K |
| David Bonderman | Self-employed · Philanthropist | TX | 20040922 | $80K |
| Frank Brunkhorst | Bar's Head Provisions · Chairman | FL | 20040922 | $75K |
| John Haas | Retired | PA | 20041001 | $75K |
| Robert Perkowitz | Smith & Noble Inc., · Entrepreneur, President | NC | 20041012 | $70K |
| Ellery Akers | self-employed · artist | CA | 20040128 | $70K |
| Linda Pritzker | Investor | TX | 20061020 | $60K |
| Roger Sant | Summit Foundation · Chairman, Board of Trustees | DC | 20041021 | $50K |
| Henry Wallace | Wallace Global Fund · President | DC | 20040819 | $50K |
| Frank Brunckhorst | Boar's Head Provisions Co, Inc · Executive | FL | 20031201 | $50K |
| John Hunting | Retired | DC | 20020930 | $50K |
| Peter Goldman | Washington Forest Law Center · Attorney | WA | 20040213 | $50K |