The Wietersen Foundation is a private foundation focused on Philanthropy, Voluntarism & Grantmaking, based in LA JOLLA, CA. IRS filing data is available from 2020 through 2024. In 2024, it awarded 1 grants totaling $116K.
Financial Overview
From 2024 IRS Form 990-PF · View filing
Total Assets
—
-100.0% YoY
Annual Giving
$116K
Grant Count
1
Avg Grant Size
$116K
Under IRS private-foundation payout rules, The Wietersen Foundation reported a distributable amount of $5K for 2024 — the minimum it must pay out in qualifying distributions.
About The Wietersen Foundation
Based on IRS filings
The Wietersen Foundation is a private foundation focused on Philanthropy, Voluntarism & Grantmaking, based in LA JOLLA, CA. IRS filing data is available from 2020 through 2024. In 2024, it awarded 1 grants totaling $116K.
Focus Areas
Ready to take the next step with The Wietersen Foundation?
Geographic Focus
Where this funder awards grants
Grant Distribution by State
States
Cities
Financial History
Multi-year comparison from IRS filings
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | — | $146,782 | $174,061 |
| Revenue | $286 | $513 | $777 |
| Expenses | $147,068 | $27,792 | $73,994 |
| Qualifying Distributions | $145,324 | $25,771 | $71,917 |
| Net Investment Income | — | — | — |
| Distributable Amount | $5,452 | $7,656 | $9,910 |
Giving Over Time
Total grant dollars and number of grants per year
Grant Insights
How this funder distributes its grants
Top Recipients
Top 1 recipients in 2024
Grant Size Distribution
1 grants across all recorded years
Giving History
Grant recipients and amounts by year
Among its reported 2024 grants, the largest include San Diego Lesbian Gay Bisexual and Transgender Community Center ($116,044).
| Recipient | Purpose | Amount |
|---|---|---|
| SAN DIEGO LESBIAN GAY BISEXUAL AND TRANSGENDER COMMUNITY CENTER SAN DIEGO, CA | GENERAL OPERATIONS | $116,044 |
Leadership & Key People
Officers and directors from IRS filings
Compensation Overview
From 2024 IRS filing
From 2024 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| PAUL J DOSTART | TRUSTEE | 5 | — |
Subject Areas
Focus areas based on grantmaking activity
Frequently Asked Questions
What is The Wietersen Foundation?
The Wietersen Foundation is a private foundation focused on Philanthropy, Voluntarism & Grantmaking, based in LA JOLLA, CA. It holds — in total assets as of 2024.
Where does The Wietersen Foundation operate?
The Wietersen Foundation has awarded grants in California.
What size grants does The Wietersen Foundation award?
In 2024, The Wietersen Foundation awarded 1 grants totaling $116K — an average of about $116K per grant, based on its IRS Form 990 filings.
How much is The Wietersen Foundation required to give away each year?
Private foundations must generally distribute about 5% of their assets annually. For 2024, The Wietersen Foundation reported a distributable amount of $5K on its IRS Form 990-PF — the minimum it must pay out in qualifying distributions.
What is The Wietersen Foundation's EIN?
The Wietersen Foundation's EIN (Employer Identification Number) is 95-4525573. IRS Form 990 filing data is available on this page for 2020–2024.
Explore Open Grants
Browse active grant opportunities in The Wietersen Foundation's focus areas in our free grants database
Similar Funders
Funders that support many of the same organizations
Silicon Valley Community Foundation
MOUNTAIN VIEW, CA
Assets
$12.3B
Grants
3,576
Total Given
$3.2B
Tides Foundation
SAN FRANCISCO, CA
Assets
$534.5M
Grants
2,110
Total Given
$382.1M
California Community Foundation
LOS ANGELES, CA
Assets
$2.2B
Grants
2,025
Total Given
$272.6M
The William & Flora Hewlett Foundation
MENLO PARK, CA
Assets
$14.2B
Grants
2,001
Total Given
$625.0M
Bright Funds Foundation
SAN JOSE, CA
Assets
$10.8M
Grants
1,690
Total Given
$38.2M
The San Francisco Foundation
SAN FRANCISCO, CA
Assets
$1.7B
Grants
1,623
Total Given
$189.1M
Sempra Foundation
SAN DIEGO, CA
Assets
$11.5M
Grants
1,501
Total Given
$1.8M
Marin Community Foundation
NOVATO, CA
Assets
$1.1B
Grants
1,383
Total Given
$176.2M
Conrad N Hilton Foundation
WESTLAKE VILLAGE, CA
Assets
$7.4B
Grants
1,339
Total Given
$287.7M
Chamberlin Education Foundation
RICHMOND, CA
Assets
$80.6M
Grants
1,302
Total Given
$3.0M
The California Endowment
LOS ANGELES, CA
Assets
$4.5B
Grants
1,125
Total Given
$215.9M
Kaiser Foundation Hospitals
OAKLAND, CA
Assets
$87.4B
Grants
1,122
Total Given
$225.4M
Data last updated April 2026. Sourced from IRS Form 990-PF filings.
What could you do with The Wietersen Foundation on Grantable?
- Assess strategic fit with your organization
- Draft a tailored letter of inquiry
- Find open RFPs from this funder
- Monitor for new funding opportunities
Go from researching The Wietersen Foundation to a real strategy.