Walter and Lillian Siben Foundation
The Walter and Lillian Siben Foundation is a private foundation based in Boca Raton, Florida. Its 2022 filing is marked as the organization’s final return; the foundation reported that it had disposed of all its assets and disbursed all funds to charitable organizations, so it appears to have wound down and stopped grantmaking.
Walter and Lillian Siben Foundation at a glance
In short: Walter and Lillian Siben Foundation gave $756K across 25 grants in 2022 (avg $30K), top state Florida. 40% of 2022 grantees were new. Source: 2022 IRS Form 990-PF.
- Annual giving (2022)
- $756,011
- +1133.3% vs 2021
- Grants made (2022)
- 25
- +0.0% vs 2021
- Average grant
- $30,240
- +1133.3% vs 2021
- Median grant
- $10,000
- New grantees (estimate)
- 40% first-time grantees (10 of 25, 2022)
- Primary geography
- Florida (46% of itemized 2022 grant dollars)
- Latest 990 filing
- Form 990-PF, 2022 View filing
Data from IRS Form 990-PF, 2022; updated October 2026. New grantees are estimated by matching recipient names across years (methodology).
How to apply to Walter and Lillian Siben Foundation
- Accepts unsolicited proposals
- No
- Contact
Mailing address: 728 Sevilla Drive, Boca Raton, FL 33432
Phone: (561) 750-2199
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who Walter and Lillian Siben Foundation funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2022
The largest 2022 recipient was Schwab Charitable Fund ($220K). Together the top 10 received $650K.
Grant Size Distribution
70 grants across all recorded years
The most common grant size was under $50K: 66 grants of 70 (94%).
Geographic Focus
Where this funder awards grants
In 2022, 46% of grant dollars went to recipients in Florida, 30% to California, and 21% to Virginia. Recipients in Washington, DC, and New York each received 1%.
Grant Distribution by State
Share of 2022 grant dollars across all 25 itemized grants.
Cities
Is Walter and Lillian Siben Foundation open to new grantees?
40%
first-time grantees, 2022
In 2022, 10 of 25 grantees (40%) were first-time recipients. First grants averaged $30K; repeat grants $31K. How we count
Medians: $10K first-time, $15K repeat.
- 48% of 2022 grantees were also funded in 2021. Method
- In 2022 it paid out well above its IRS minimum distribution (the 5% rule). Method
Estimate from itemized grant lists in IRS Form 990-PF filings (2020–2022). Recipient names are matched across years, so a renamed or misspelled grantee can look new; grants to individuals are left out. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2020 to 2022, annual grant giving ranged from $29K (2020) to $756K (2022). In 2022 it made 25 grants totaling $756K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Schwab Charitable Fund San Francisco, CA | Unrestricted grant for charitable giving program that providesusefulinformation,unbiased guidanceandadvantageouswaystogive | $220,000 |
| Peta Norfolk, VA | Unrestricted Animal Rights Related Operating Grant | $160,000 |
| Bethesda Hospital Foundation Inc Boynton Beach, FL | Unrestricted Hospital Support Related Grant | $60,000 |
| The Soup Kitchen Inc Boynton Beach, FL | Unrestricted Indigent Care Related Operating Grant | $60,000 |
| Caridad Center Inc Boynton Beach, FL | Unrestricted Indigent Health Services Related Operating Grant | $40,000 |
| Feeding South Florida Pembroke Park, FL | Unrestricted Grant to Provide Food to South Floridians | $40,000 |
| Crazy 8 Cat Rescue Parkland, FL | Unrestricted Animal Care Related Operating Grant | $20,000 |
| Animal Aid Oakland Park, FL | Unrestricted Animal Shelter Related Operating Grant | $19,661 |
| Lady Luck Animal Resuce Inc Lake Worth, FL | Unrestricted Animal Rescue Related Operating Grant | $15,000 |
| Dezzy's Second Chance Animal Rescue Delray Beach, FL | Unrestricted Animal Care Related Operating Grant | $15,000 |
Ready to take the next step with Walter and Lillian Siben Foundation?
Financial History
Multi-year comparison from IRS filings
The most recent filing on record is for 2022. The foundation’s filing states that it had disposed of all its assets and disbursed all funds to charitable organizations.
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Qualifying Distributions | Net Investment Income | Distributable Amount |
|---|---|---|---|---|---|---|---|---|
| 2022 | — | $222,714 | $764,962 | $756,011 | 25 | $758,986 | $216,415 | $17,526 |
| 2021 | $542,572 | $131,086 | $81,917 | $61,300 | 25 | $69,920 | $68,132 | $37,115 |
| 2020 | $493,094 | $48,724 | $45,462 | $29,350 | 20 | — | $39,318 | $30,183 |
Under IRS private-foundation payout rules, Walter and Lillian Siben Foundation reported a distributable amount of $18K for 2022 — the minimum it must pay out in qualifying distributions.
Research compiled by Grantable AI from public sources. Last updated October 2026.
Mission & Focus Areas
No mission statement for the foundation is provided. Its 2022 grants show support for organizations working in several areas. For example, The Soup Kitchen described its work as providing food, baby supplies, education, immunizations, and other items at no cost to people seeking aid. Caridad Center said its mission is to improve the health, education, and quality of life of underserved children and families in Palm Beach County. Animal Aid described its work as rescuing and rehabilitating cats and dogs, supporting adoptions, and providing low-cost spay/neuter services. These are the grantees’ stated missions, not the foundation’s.
Grantmaking
In 2022, the foundation made 25 grants totaling $756,011. Grant amounts ranged from $350 to $220,000, with a median grant of $10,000. The largest grants included $220,000 to Schwab Charitable Fund for a charitable giving program and $160,000 to PETA for animal-rights-related operating support. Other notable grants were $60,000 each to Bethesda Hospital Foundation and The Soup Kitchen, $40,000 each to Caridad Center and Feeding South Florida, and $19,661 to Animal Aid.
The foundation stated that it made contributions only to preselected charitable organizations and does not accept unsolicited requests for funds. Because its 2022 return was final and it reported that all assets had been disposed of and funds disbursed, this is not a current application opportunity.
Leadership & Key People
Leadership team and compensation from IRS filings
The 2022 filing listed Jeffrey Siben and Susanne Siben Tabor as directors, and Gary Siben as secretary/treasurer.
Walter and Lillian Siben Foundation's 2022 filing lists 3 officers; 1 of 3 officers listed in 2022 is compensated.
Officers on the 2022 filing
Jeffrey Siben
Director
On filings since 2020
5 hrs/week
$9K (2020) → $4K (2022)
Susanne Siben Tabor
Director
On filings since 2020
0.5 hrs/week
No compensation reported
Gary Siben
Secretary & Treasurer
On filings since 2020
0.5 hrs/week
No compensation reported
Data from IRS Form 990 filings, 2020–2022. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2022 IRS filing
The highest reported compensation on the 2022 filing was $4K, to Jeffrey Siben (Director).
Frequently asked questions about Walter and Lillian Siben Foundation
How much does Walter and Lillian Siben Foundation give each year?
Walter and Lillian Siben Foundation gave $756K across 25 grants in 2022, according to its 2022 IRS Form 990-PF. In 2021 it gave $61K across 25 grants.
What is Walter and Lillian Siben Foundation's typical grant size?
Walter and Lillian Siben Foundation's median grant in 2022 was $10,000, and its average grant was $30,240, across 25 grants on its 2022 IRS Form 990-PF. Organizations receiving their first grant from Walter and Lillian Siben Foundation that year got $30K on average.
Where does Walter and Lillian Siben Foundation give grants?
Walter and Lillian Siben Foundation's top state is Florida, with 46% of the grant dollars itemized on its 2022 IRS Form 990-PF. The next largest states were California (30%) and Virginia (21%). The most frequent recipient cities were Boynton Beach, FL (4 grants).
Does Walter and Lillian Siben Foundation give general operating support?
Yes: 100% of Walter and Lillian Siben Foundation's 2022 grants with a stated purpose (25 of 25) were for general or operating support, per its 2022 IRS Form 990-PF.
Who are Walter and Lillian Siben Foundation's largest grantees?
Walter and Lillian Siben Foundation's largest 2022 grantees include Schwab Charitable Fund ($220,000), Peta ($160,000) and Bethesda Hospital Foundation Inc ($60,000), according to its 2022 IRS Form 990-PF. Together they received 58% of its itemized 2022 grant dollars.
What does Walter and Lillian Siben Foundation fund?
No mission statement for the foundation is provided. Its 2022 grants show support for organizations working in several areas. For example, The Soup Kitchen described its work as providing food, baby supplies, education, immunizations, and other items at no cost to people seeking aid. See mission & focus areas ↑
How do I apply for a grant from Walter and Lillian Siben Foundation?
Walter and Lillian Siben Foundation does not accept unsolicited proposals, according to Grantable's research on its published guidelines.
How much is Walter and Lillian Siben Foundation required to give away each year?
Private foundations must generally distribute about 5% of their assets annually. For 2022, Walter and Lillian Siben Foundation reported a distributable amount of $18K on its IRS Form 990-PF — the minimum it must pay out in qualifying distributions.
What is Walter and Lillian Siben Foundation's EIN?
Walter and Lillian Siben Foundation's EIN (Employer Identification Number) is 11-3337637. IRS Form 990 filing data is available on this page for 2020–2022.
Does Walter and Lillian Siben Foundation accept unsolicited proposals?
No, according to Grantable's research on the foundation's published guidelines. See how to apply ↑
Data last updated October 2026. Sourced from IRS Form 990-PF filings. Research dossier generated October 2026.
Data update history
(1)
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2020–2022
Live grants for the work Walter and Lillian Siben Foundation funds
Philanthropy, Voluntarism & Grantmaking Open opportunities, soonest deadline first.
Explore Open Grants
Browse active grant opportunities in Walter and Lillian Siben Foundation's focus areas in our free grants database
Similar Funders
Funders that support many of the same organizations
Enterprise Holdings Foundation
Saint Louis, MO
The Enterprise Holdings Foundation supports charitable and educational nonprofits in communities where Enterprise Mobility operates, focusing on health, education, arts, and disaster relief; applicants must be actively supported by an Enterprise Mobility team member, spouse, or domestic partner. Giving varies widely: it reported 9,499 grants in 2024, but its 2025 filing showed one grant of $101.4 million, so that amount is not a typical award. Applications are accepted at any time through eligible Enterprise-affiliated applicants; the Foundation does not limit giving to preselected organizations.
Assets
$594.3M
Grants
1
Total Given
$101.4M
Aetna Foundation Inc
Hartford, CT
Aetna Foundation supported health and wellness, access to health care, and related community needs; its 2021 grants ranged from $5,000 to $1 million, with a median of $40,000, and went to organizations across multiple states, especially in D.C. and Connecticut. Its 2021 filing was marked final, so it appears to have ended or be winding down grantmaking; that filing said there were no restrictions on who could apply and pointed applicants to its website for application materials.
Assets
—
Grants
65
Total Given
$7.2M
Stanley Consultants Charitable Foundation
Muscatine, IA
The Stanley Consultants Charitable Foundation supports charitable and educational nonprofits, scholarships, and strategic partnerships, with recent grants concentrated in Iowa—especially Muscatine—and some funding elsewhere in the U.S. In 2026, grants ranged from $200 to $40,000, with a median of $2,000. It does not limit giving to preselected organizations; the profile lists no application deadline.
Assets
$1.7M
Grants
20
Total Given
$142K
The Sokol Foundation Inc
Delray Beach, FL
The Sokol Foundation supports a range of charitable organizations, with most of its 2025 grant dollars going to Florida recipients and others in several states. Its 18 grants ranged from $500 to $7,500, with a median of $2,750; it funds only preselected organizations and does not accept unsolicited requests.
Assets
$676K
Grants
18
Total Given
$60K
Gannett Foundation Inc
New York, NY
Gannett Foundation’s 2025 grants supported a range of organizations, with listed awards generally between $1,500 and $2,500, though the available figures do not establish a typical grant size or geographic focus. The foundation has wound down: its 2026 filing reports no grants or assets, and no current application process or acceptance of unsolicited requests is stated.
Assets
—
Grants
32
Total Given
$65K
Leslie L Alexander Foundation Inc
Delray Beach, FL
The Leslie L Alexander Foundation supports animal rescue, education, children’s services, and other charitable work. In 2024, grants ranged from $600 to $1 million, with a median of $35,000; giving was concentrated in Florida and Texas, with awards also made elsewhere. It gives only to preselected organizations and does not accept unsolicited requests.
Assets
$291.4M
Grants
622
Total Given
$28.4M
More similar funders
More Funders in Florida
The filing figures on this page are open data under CC BY 4.0. About GrantGraph Open
Figures come from Walter and Lillian Siben Foundation's IRS filings (methodology). AI-written summaries, news items and logos are not covered by the open licence. Spot an error? Email hello@grantable.co.
Walter and Lillian Siben Foundation down — hundreds of funders to go?