The Charles F and Ruth J Knippenberg
The Charles F and Ruth J Knippenberg is a private foundation based in Scottsdale, Arizona. Its 2025 filing reports 32 charitable grants totaling $214,777 to organizations in several states.
The Charles F and Ruth J Knippenberg at a glance
In short: The Charles F and Ruth J Knippenberg gave $215K across 32 grants in 2025 (avg $7K), top state Arizona. 44% of 2025 grantees were new. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $214,777
- +21.4% vs 2024
- Grants made (2025)
- 32
- +39.1% vs 2024
- Average grant
- $6,712
- -12.8% vs 2024
- Median grant
- $5,000
- Total assets
- $3,049,445
- -2.9% vs 2024
- New grantees (estimate)
- 44% first-time grantees (14 of 32, 2025)
- Primary geography
- Arizona (35% of itemized 2025 grant dollars)
- Latest 990 filing
- Form 990-PF, 2025 View filing
Data from IRS Form 990-PF, 2025; updated October 2026. New grantees are estimated by matching recipient names across years (methodology).
How to apply to The Charles F and Ruth J Knippenberg
- Accepts unsolicited proposals
- No
- How to Apply
-
The foundation states that it makes contributions only to preselected charitable organizations and does not accept unsolicited requests for funds.
- Contact
Mailing address: Co J Porter 12637 N 67Th Street, Scottsdale, AZ 85254
Phone: (480) 203-4123
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who The Charles F and Ruth J Knippenberg funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2025
The largest 2025 recipient was University of Notre Dame ($18K). Together the top 10 received $119K.
Grant Size Distribution
122 grants across all recorded years
The most common grant size was under $50K: 122 grants of 122 (100%).
Geographic Focus
Where this funder awards grants
In 2025, Arizona recipients received 35% of grant dollars, New Jersey recipients 18%, Virginia recipients 17%, Indiana recipients 10%, and Illinois recipients 5%. The remaining share went to recipients in other states.
Grant Distribution by State
Share of 2025 grant dollars across all 32 itemized grants.
States
Cities
Is The Charles F and Ruth J Knippenberg open to new grantees?
44%
first-time grantees, 2025
In 2025, 14 of 32 grantees (44%) were first-time recipients. First grants averaged $5K; repeat grants $8K. How we count
Medians: $5K first-time, $5K repeat.
- 47% of 2025 grantees were also funded in 2024. Method
- Giving held roughly steady from 2022 to 2025 (+10%). Method
- In 2025 it paid out 100% of its IRS minimum distribution (the 5% rule). Method
Estimate from itemized grant lists in IRS Form 990-PF filings (2019–2025). 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 2019 to 2025, annual grant giving ranged from $162K (2021) to $231K (2019). In 2025 it made 32 grants totaling $215K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| University of Notre Dame Notre Dame, IN | Charitable | $17,500 |
| Mothers Grace Scottsdale, AZ | Charitable | $16,000 |
| PG Chambers School Cedar Knolls, NJ | Charitable | $15,500 |
| Turning Point USA Lemont, IL | Charitable | $10,412 |
| Atlas Sterling, VA | Charitable | $10,000 |
| Bernard Township PBA Basking Ridge, NJ | Charitable | $10,000 |
| Christian Family Care Phoenix, AZ | Charitable | $10,000 |
| Oasis Paterson, NJ | Charitable | $10,000 |
| Pilots to the Rescue Brooklyn, NY | Charitable | $10,000 |
| Project Horses Great Falls, VA | Charitable | $10,000 |
Ready to take the next step with The Charles F and Ruth J Knippenberg?
Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Qualifying Distributions | Net Investment Income | Distributable Amount |
|---|---|---|---|---|---|---|---|---|
| 2025 | $3,049,445 | $157,696 | $241,133 | $214,777 | 32 | $226,087 | $136,131 | $225,510 |
| 2024 | $3,140,864 | $174,903 | $198,308 | $176,962 | 23 | $185,995 | $165,465 | $209,210 |
| 2023 | $3,169,681 | $95,662 | $206,494 | $184,941 | 23 | $193,713 | $141,391 | $185,734 |
| 2022 | $3,281,513 | $78,995 | $219,095 | $194,592 | 27 | $205,297 | $128,968 | $196,146 |
| 2021 | $3,424,113 | $144,149 | $185,578 | $162,356 | 17 | $172,519 | $133,340 | $204,255 |
| 2020 | $3,467,867 | $119,509 | $207,955 | $181,602 | 22 | — | $129,821 | $174,088 |
| 2019 | $3,557,793 | $158,891 | $254,299 | $231,065 | 27 | — | $147,707 | $200,602 |
Under IRS private-foundation payout rules, The Charles F and Ruth J Knippenberg reported a distributable amount of $226K for 2025 — 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 2025 grants include support for organizations working in areas such as education, family and community services, housing, and animal welfare. For example, PG Chambers School describes its mission as educating and developing children with disabilities, while Mother’s Grace says it assists mothers and children facing difficult circumstances. Pilots to the Rescue says it transports at-risk animals to improve their chances of adoption. These are the grantees’ stated missions, not the foundation’s.
Grantmaking
In 2025, the foundation made 32 grants totaling $214,777. Grants ranged from $500 to $17,500, with a median of $5,000. Among the largest were $17,500 to the University of Notre Dame, $16,000 to Mother’s Grace, $15,500 to PG Chambers School, $10,412 to Turning Point USA, and $10,000 each to Atlas, Bernard Township PBA, Christian Family Care, Oasis, Pilots to the Rescue, Project Horses, and St. Patrick’s Catholic Church.
Other 2025 grants included $5,000 each to Habitat for Humanity–North Central Georgia, Forever Loved Pet Sanctuary, Community Food Bank, Arizona Sunshine Angels, and Maggie’s Place. The grantees describe work including building homes with low-income families, supporting senior dogs, addressing hunger, assisting children in residential group homes, and providing housing for homeless pregnant women.
Leadership & Key People
Leadership team and compensation from IRS filings
The 2025 filing lists Jennifer Porter, Patricia Aboia, and Regina Aboia-Vall as trustees.
The Charles F and Ruth J Knippenberg's 2025 filing lists 3 officers; 1 of 3 officers listed in 2025 is compensated.
Officers on the 2025 filing
Patricia Aboia
Trustee
On filings since 2019
1 hr/week
$20K (2019) → $23K (2025)
Jennifer Porter
Trustee
On filings since 2019
1 hr/week
No compensation reported
Regina Aboia-Vall
Trustee
On filings since 2019
1 hr/week
No compensation reported
Data from IRS Form 990 filings, 2019–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2025 IRS filing
The highest reported compensation on the 2025 filing was $23K, to Patricia Aboia (Trustee).
Frequently asked questions about The Charles F and Ruth J Knippenberg
How much does The Charles F and Ruth J Knippenberg give each year?
The Charles F and Ruth J Knippenberg gave $215K across 32 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $177K across 23 grants.
What is The Charles F and Ruth J Knippenberg's typical grant size?
The Charles F and Ruth J Knippenberg's median grant in 2025 was $5,000, and its average grant was $6,712, across 32 grants on its 2025 IRS Form 990-PF. Organizations receiving their first grant from The Charles F and Ruth J Knippenberg that year got $5K on average.
Where does The Charles F and Ruth J Knippenberg give grants?
The Charles F and Ruth J Knippenberg's top state is Arizona, with 35% of the grant dollars itemized on its 2025 IRS Form 990-PF. The next largest states were New Jersey (18%) and Virginia (17%). The most frequent recipient cities were Phoenix, AZ (5 grants), Scottsdale, AZ (3 grants), Leesburg, VA (3 grants) and Notre Dame, IN (2 grants).
Does The Charles F and Ruth J Knippenberg give general operating support?
Not in 2025: none of the 32 grants with a stated purpose on The Charles F and Ruth J Knippenberg's 2025 IRS Form 990-PF were described as general or operating support. Recurring purposes include "Charitable" (32 grants).
Who are The Charles F and Ruth J Knippenberg's largest grantees?
The Charles F and Ruth J Knippenberg's largest 2025 grantees include University of Notre Dame ($17,500), Mothers Grace ($16,000) and PG Chambers School ($15,500), according to its 2025 IRS Form 990-PF. Together they received 23% of its itemized 2025 grant dollars.
How large is The Charles F and Ruth J Knippenberg?
The Charles F and Ruth J Knippenberg reported $3.0M in total assets on its 2025 IRS Form 990-PF. It paid out $226K in qualifying distributions that year, against a required minimum of $226K (roughly 5% of its investment assets).
What does The Charles F and Ruth J Knippenberg fund?
No mission statement for the foundation is provided. Its 2025 grants include support for organizations working in areas such as education, family and community services, housing, and animal welfare. See mission & focus areas ↑
How do I apply for a grant from The Charles F and Ruth J Knippenberg?
The foundation states that it makes contributions only to preselected charitable organizations and does not accept unsolicited requests for funds. Eligibility and process details are in the grantmaking section of this profile. See how to apply ↑
What is The Charles F and Ruth J Knippenberg's EIN?
The Charles F and Ruth J Knippenberg's EIN (Employer Identification Number) is 22-3746616. IRS Form 990 filing data is available on this page for 2019–2025.
Does The Charles F and Ruth J Knippenberg 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
(7)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2024 (received by the IRS April 29, 2025)
- Updated Form 990-PF for fiscal year 2025 (received by the IRS May 14, 2026)
- Added Form 990-PF for fiscal year 2019 (received by the IRS July 10, 2020)
- Updated Form 990-PF for fiscal year 2020 (received by the IRS May 4, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS June 3, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS May 1, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS May 7, 2024)
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Cite this profile
Grantable. (2026). The Charles F and Ruth J Knippenberg funder profile. GrantGraph. Retrieved October 5, 2026, from https://grantable.co/funders/the-charles-f-and-ruth-j-knippenberg-morg_d24adf33592642d19b6faf4c3921909f
BibTeX
@misc{grantable_223746616_2026,
author = {{Grantable}},
title = {{The Charles F and Ruth J Knippenberg funder profile}},
howpublished = {GrantGraph},
year = {2026},
url = {https://grantable.co/funders/the-charles-f-and-ruth-j-knippenberg-morg_d24adf33592642d19b6faf4c3921909f},
note = {Accessed 2026-10-05. Data licensed CC BY 4.0}
}The figures on this page are open data under CC BY 4.0: reuse them with credit to Grantable and a link. Download the data.
Figures come from The Charles F and Ruth J Knippenberg'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.
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