The William B Wiener Jr Foundation
Type I supporting organization to rockefeller family fund, inc. A public charity whose mission is to initiate, cultivate, and fund strategic efforts to promote a sustainable, just, free, and participatory society.
Key facts about The William B Wiener Jr Foundation
In short: The William B Wiener Jr Foundation gave $1.1M across 1 grant in 2024 (avg $1.1M), mostly in New York. Source: 2024 IRS Form 990 filing.
- EIN
- 72-6024398
- Latest 990 filing
- Form 990 filing, 2024
- Annual giving (2024)
- $1,100,000
- Grants made (2024)
- 1
- Average grant
- $1,100,000
- Median grant
- $1,100,000
- Total assets
- $4,605,672
- Primary geography
- New York (100% of itemized 2024 grant dollars)
Data from IRS Form 990 filing, 2024; updated September 2026.
Financial Overview
From 2024 IRS Form 990 filing · View filing
Total Assets
$4.6M
-22.7% YoY
Annual Giving
$1.1M
-97.9% YoY
Grant Count
1
+0.0% YoY
Avg Grant Size
$1.1M
-97.9% YoY
How The William B Wiener Jr Foundation gives
- Giving fell 91% from 2021 to 2024. Method
From the foundation's IRS Form 990 filings. Methodology.
About The William B Wiener Jr Foundation
Based on IRS filings
The William B Wiener Jr Foundation is a nonprofit organization, based in Shreveport, LA. IRS filing data is available from 2020 through 2024. As of 2024, the organization holds $4.6M in total assets. In 2024, it awarded 1 grant totaling $1.1M. Net investment income was $658K.
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Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of all 1 itemized 2024 grant dollars.
States
Cities
Giving Over Time
Total grant dollars and number of grants per year
From 2020 to 2024, annual grant giving ranged from $1.1M (2024) to $53.1M (2023). In 2024 it made 1 grant totaling $1.1M.
Grant Insights
How this funder distributes its grants
Top Recipients
Top 1 recipients in 2024
The largest 2024 recipient was Rockefeller Family Fund Inc ($1.1M).
Grant Size Distribution
5 grants across all recorded years
The most common grant size was in the $1–5M range: 3 grants of 5 (60%).
Giving History
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Rockefeller Family Fund Inc New York, NY | Support for rff programs: environment, democracy, and other charitable purposes | $1,100,000 |
Financial History
Multi-year comparison from IRS filings
| Metric | 2024 | 2023 | 2022 |
|---|---|---|---|
| Total Assets | $4,605,672 | $5,961,828 | $43,300,325 |
| Revenue | $657,921 | $30,454,265 | $2,963,352 |
| Expenses | $1,425,085 | $53,687,881 | $2,084,275 |
| Qualifying Distributions | — | — | — |
| Net Investment Income | $657,921 | $30,454,265 | $2,963,352 |
| Distributable Amount | — | — | — |
Data update history
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2020–2024
Leadership & Key People
Officers and directors from IRS filings
The William B Wiener Jr Foundation is led by Donald B. Wiener, President & Assistant Treasurer since 2022 (on filings since 2020); none of the 6 officers listed in 2024 report compensation.
Officers on the 2024 filing
Donald B. Wiener
President & Assistant Treasurer
Director, President & Assistant Treasurer → President & Assistant Treasurer, 2022
On filings since 2020
2 hrs/week
No compensation reported
Elizabeth Mayo
Executive Director
On filings since 2020
10 hrs/week
No compensation reported
David Rockefeller Jr.
Vice President
Director → Vice President, 2022
On filings since 2020
2 hrs/week
No compensation reported
Jay R. Halfon
Treasurer & Assistant Secretary
Director & Assistant Secretary → Treasurer & Assistant Secretary, 2022
On filings since 2020
2 hrs/week
No compensation reported
Jeffrey W. Weiss
Secretary
Director, Treasurer & Secretary → Secretary, 2022
On filings since 2020
2 hrs/week
No compensation reported
Miranda Kaiser
Vice President
Director & Vice President → Vice President, 2022
On filings since 2021
2 hrs/week
No compensation reported
Former officers (2)
- Former: William B. Wiener Jr. (2020–2023) — Vice President & Assistant Treasurer
- Former: David Kaiser (2020) — Director & Vice President
Data from IRS Form 990 filings, 2020–2024. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Frequently asked questions about The William B Wiener Jr Foundation
How much does The William B Wiener Jr Foundation give each year?
The William B Wiener Jr Foundation gave $1.1M across 1 grant in 2024, according to its 2024 IRS Form 990 filing. In 2023 it gave $53.1M across 1 grant.
How large is The William B Wiener Jr Foundation?
The William B Wiener Jr Foundation reported $4.6M in total assets on its 2024 IRS Form 990 filing. Its revenue that year was $658K.
Where does The William B Wiener Jr Foundation operate?
The William B Wiener Jr Foundation has awarded grants in New York.
What is The William B Wiener Jr Foundation's EIN?
The William B Wiener Jr Foundation's EIN (Employer Identification Number) is 72-6024398. IRS Form 990 filing data is available on this page for 2020–2024.
Data last updated September 2026. Sourced from IRS Form 990 filings.
Here's the math on researching The William B Wiener Jr Foundation by hand.
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