| DONOR ADVISED CHARITABLE GIVING | 311640316 | 2018-06-30 | $410K | EDUCATION |
| NEW VENTURE FUND | 205806345 | 2018-12-31 | $119K | ENVIRONMENTAL PROGRAMS |
| WILDERNESS SOCIETY | 530167933 | 2022-09-30 | $111K | CONSERVATION PROJECTS |
| WILDERNESS SOCIETY | 530167933 | 2019-09-30 | $75K | CONSERVATION PROJECTS |
| PEW CHARITABLE TRUSTS | 562307147 | 2018-06-30 | $70K | Policy |
| THE SUMMIT FOUNDATION | 742341399 | 2017-09-30 | $68K | PROGRAM SUPPORT |
| EDISON ELECTRIC INSTITUTE | 130659550 | 2022-12-31 | $60K | CONTRIBUTION/PROGRAM SUPPORT |
| DENVER FOUNDATION | 846048381 | 2016-12-31 | $60K | A GRANT OF $10,000 BE MADE TO THE KEYSTONE CENTER RESTRICTED TO CONTINUE THE CO-EDUPIC COALITION CREATING INNOVATIVE ALTERNATIVE APPROACHED TO EDUCATOR PREPARATION. |
| EDISON ELECTRIC INSTITUTE | 130659550 | 2024-12-31 | $59K | CONTRIBUTION/PROGRAM SUPPORT |
| THE ENERGY FOUNDATION | 943126848 | 2016-12-31 | $50K | TO SUPPORT EDUCATION AND OUTREACH ABOUT CLEAN ENERGY |
| PROJECT APIS M | 208345956 | 2019-06-30 | $43K | RESEARCH GRANT |
| WESTERN CONSERVATION FOUNDATION | 331107506 | 2022-12-31 | $40K | CONSERVATION EDU. |
| ENVIRONMENTAL DEFENSE FUND INCORPORATED | 116107128 | 2016-09-30 | $40K | Ecosystems |
| ROOTED | 823215105 | 2022-06-30 | $40K | SCHOOL QUALITY & EQU |
| WILDERNESS SOCIETY | 530167933 | 2023-09-30 | $30K | CONSERVATION PROJECTS |
| WESTERN CONSERVATION FOUNDATION | 331107506 | 2024-12-31 | $30K | CONSERVATION EDUCATI |