Anthony and Dorothy Riddle Family Foundation
Preselected recipients only
Anthony and Dorothy Riddle Family Foundation is a private foundation in Boulder, Colorado. In tax year 2025 it gave $40,000 in 6 grants; the typical grant was $2,000 and the largest $30,000. It only gives to organizations it selects itself and does not accept unsolicited applications.
From its IRS Form 990-PF for tax year 2025.
- Grants paid, 2025$40,000
- Number of grants6
- Typical grant$2,000
- Largest grant$30,000
- Assets$848,448
- New grantees20%
Giving in 2025 was up from $37,000 the year before.
20% of its 2025 grantees had not received a grant from it the year before, a mix of repeat and new grantees.
Giving by year
| Tax year | Grants paid | Number of grants | Assets |
|---|---|---|---|
| 2023 | $37,000 | 4 | $761,047 |
| 2024 | $37,000 | 5 | $835,983 |
| 2025 | $40,000 | 6 | $848,448 |
How to apply
Anthony and Dorothy Riddle Family Foundation says in its IRS filing that it only makes contributions to preselected organizations, so unsolicited applications are unlikely to be considered. Organizations it funds are usually invited.
What Anthony and Dorothy Riddle Family Foundation funds
Where it gives
Its grants went to recipients in 4 states, the most to Colorado.
| State | Grants | Amount |
|---|---|---|
| Colorado | 3 | $34,000 |
| California | 1 | $4,000 |
| Arizona | 1 | $1,000 |
| Georgia | 1 | $1,000 |
Grants paid in 2025
| Recipient | Purpose | Amount |
|---|---|---|
| University of Colorado Foundation | Scholarships | $30,000 |
| Bechtel International Center | Encouraging interactions with international visitors | $4,000 |
| Individual | Scholarship and Intergenerational activity support | $2,000 |
| Colorado Fourteeners | Preserve trails and open spaces for intergenerational interactions | $2,000 |
| International Topical Steroid Awareness Network | Awareness of TSC | $1,000 |
| Grand Canyon Youth | Funding for intergenerational interaction with nature | $1,000 |
Officers and trustees
- Dorothy Kathryn Riddle
- Christopher Cooper Riddle
- Kathryn Riddle Penzkover
Questions people ask
Does Anthony and Dorothy Riddle Family Foundation accept grant applications?
No. Its IRS filing says it only makes contributions to preselected organizations.
How much does Anthony and Dorothy Riddle Family Foundation give?
$40,000 in tax year 2025, across 6 grants, with a typical grant of $2,000.
Who runs Anthony and Dorothy Riddle Family Foundation?
Its 2025 filing lists Dorothy Kathryn Riddle (1), Christopher Cooper Riddle (1) and Kathryn Riddle Penzkover (1).
What does Anthony and Dorothy Riddle Family Foundation fund?
Based on its grants, mainly education, international and environment and conservation.