Anthony and Dorothy Riddle Family Foundation
Invitation OnlyBoulder, Colorado · EIN 73-1631943 · Private foundation
Grants paid (2025)$40K
Organizations funded6
Typical grant$2,000
Total assets$848K
Half of its grants to organizations were between $1,000 and $4,000.
From the return
How to apply
On its return for tax year 2025 the foundation checked the box saying it only makes contributions to preselected charitable organizations and does not accept unsolicited requests for funds.
What it funds
Share of grant lines on the latest return, classified from the purpose each grant states.
Where it gives
50% of grants went outside Colorado.
Grants paid in tax year 2025
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| University of Colorado Foundation | Denver, CO | Scholarships | $30,000 |
| Bechtel International Center | Stanford, CA | Encouraging interactions with international visitors | $4,000 |
| CU Science Discovery | Boulder, CO | Scholarship and Intergenerational activity support | $2,000 |
| Colorado Fourteeners | Golden, CO | Preserve trails and open spaces for intergenerational interactions | $2,000 |
| International Topical Steroid Awareness Network | Dacula, GA | Awareness of TSC | $1,000 |
| Grand Canyon Youth | Flagstaff, AZ | Funding for intergenerational interaction with nature | $1,000 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2025 | $40,000 | 6 |
| 2024 | $37,000 | 5 |
| 2023 | $37,000 | 4 |
Sources
- IRS Form 990-PF, tax year 2025, filed Apr 25, 2026 - IRS e-file batch, object ID 202611179349100311
- IRS Tax Exempt Organization Search for EIN 73-1631943
- Profile updated Nov 7, 2026
Facts on this page come from the foundation's own IRS Form 990-PF filings as published by the IRS. Grantvello does not know whether a foundation is accepting proposals right now: a past grant is not an open opportunity. Always confirm current guidelines with the funder before applying.