Harris K & Lois G Oppenheimer Foundation
The Harris K & Lois G Oppenheimer Foundation is a private foundation based in San Antonio, Texas. Its 2025 filing reports grants to organizations working in areas including public media, arts and culture, conservation, child advocacy, education, and health.
Harris K & Lois G Oppenheimer Foundation at a glance
In short: Harris K & Lois G Oppenheimer Foundation gave $163K across 51 grants in 2025 (avg $3K), mostly in Texas. 6% of 2025 grantees were new. Source: 2025 IRS Form 990-PF.
- Annual giving (2025)
- $162,550
- +4.5% vs 2024
- Grants made (2025)
- 51
- -1.9% vs 2024
- Average grant
- $3,187
- +6.6% vs 2024
- Median grant
- $2,000
- Total assets
- $2,630,966
- +3.0% vs 2024
- New grantees (estimate)
- 6% first-time grantees (3 of 51, 2025)
- Primary geography
- Texas (71% 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 Harris K & Lois G Oppenheimer Foundation
- 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: 230 W Lynwood Ave, San Antonio, TX 78212-2485
Phone: (210) 733-8026
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who Harris K & Lois G Oppenheimer Foundation funds
How this funder distributes its grants
Top Recipients
Top 10 recipients in 2025
The largest 2025 recipient was World Monuments Fund ($20K). Together the top 10 received $86K.
Grant Size Distribution
263 grants across all recorded years
The most common grant size was under $50K: 263 grants of 263 (100%).
Geographic Focus
Where this funder awards grants
In 2025, 71% of grant dollars went to Texas recipients, 15% to New York, 8% to Colorado, and 2% each to Maryland and Nevada.
Grant Distribution by State
Share of 2025 grant dollars across all 51 itemized grants.
States
Cities
Is Harris K & Lois G Oppenheimer Foundation open to new grantees?
6%
first-time grantees, 2025
In 2025, 3 of 51 grantees (6%) were first-time recipients. First grants averaged $2K; repeat grants $3K. How we count
Medians: $2K first-time, $2K repeat.
- 92% of 2025 grantees were also funded in 2024. Method
- Giving held roughly steady from 2022 to 2025 (+0%). Method
- In 2025 it paid out 93% of its IRS minimum distribution (the 5% rule). Foundations have until the end of the next year to meet it. Method
Estimate from itemized grant lists in IRS Form 990-PF filings (2021–2025). 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 2021 to 2025, annual grant giving ranged from $139K (2021) to $170K (2023). In 2025 it made 51 grants totaling $163K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| World Monuments Fund New York, NY | Unrestricted | $20,000 |
| Klrnalamo Public Telecommunications Council San Antonio, TX | Unrestricted | $13,000 |
| Texas Public Radio San Antonio, TX | Unrestricted | $13,000 |
| Hillside School Boulder, CO | Unrestricted | $9,500 |
| Brackenridge Park Conservancy San Antonio, TX | Unrestricted | $5,000 |
| Child Advocates San Antonio San Antonio, TX | Unrestricted | $5,000 |
| Houston Grand Opera Houston, TX | Unrestricted | $5,000 |
| McNay Museum of Art San Antonio, TX | Unrestricted | $5,000 |
| San Antonio Museum of Art San Antonio, TX | Unrestricted | $5,000 |
| San Antonio Zoological Society San Antonio, TX | Unrestricted | $5,000 |
Ready to take the next step with Harris K & Lois G Oppenheimer Foundation?
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 | $2,630,966 | $300,736 | $196,378 | $162,550 | 51 | $171,582 | $275,940 | $184,617 |
| 2024 | $2,553,382 | $123,188 | $183,269 | $155,530 | 52 | $162,924 | $102,843 | $171,687 |
| 2023 | $2,581,963 | $89,030 | $198,165 | $169,815 | 54 | $178,134 | $91,586 | $162,920 |
| 2022 | $2,675,080 | $98,018 | $194,390 | $162,780 | 54 | $171,197 | $74,825 | $179,252 |
| 2021 | $2,769,330 | $142,542 | $165,976 | $139,125 | 52 | — | $123,004 | $169,635 |
Under IRS private-foundation payout rules, Harris K & Lois G Oppenheimer Foundation reported a distributable amount of $185K for 2025 — the minimum it must pay out in qualifying distributions.
Research compiled by Grantable AI from public sources. Last updated September 2026.
Mission & Focus Areas
No foundation mission statement is provided. Its 2025 grants include support for organizations with varied missions. For example, Texas Public Radio says its mission is to “engage, inspire and inform,” bringing people together to better understand their community and world. Child Advocates San Antonio describes its work as recruiting and leading volunteer advocates for abused and neglected children and youth. The San Antonio Zoological Society says it works to foster appreciation and concern for all living things. Other supported organizations include museums, park and garden conservancies, a school, an opera company, and health and biomedical organizations.
Grantmaking
In filing year 2025, the foundation awarded 51 grants totaling $162,550. Grant amounts ranged from $100 to $20,000, with a median grant of $2,000. The largest reported award was $20,000 to World Monuments Fund. Other notable grants included $13,000 each to Texas Public Radio and KLRNALAMO Public Telecommunications Council; $9,500 to Hillside School; and $5,000 each to Brackenridge Park Conservancy, Child Advocates San Antonio, Houston Grand Opera, McNay Museum of Art, San Antonio Museum of Art, San Antonio Zoological Society, Texas Biomedical Research Foundation, and UT Health. The listed purposes for these grants were unrestricted.
Leadership & Key People
Leadership team and compensation from IRS filings
The 2025 filing lists Claire O’Malley as president, secretary, and treasurer; Pauline Weisberg as vice president; and Alexander Harris Weisberg, Edward J. O’Malley, and Daniel H. O’Malley as trustees.
Harris K & Lois G Oppenheimer Foundation is led by Claire O. O'Malley, President, Secretary & Treasurer on every filing since 2021; none of the 5 officers listed in 2025 report compensation.
Officers on the 2025 filing
Claire O. O'Malley
President, Secretary & Treasurer
On filings since 2021
No compensation reported
Alexander Harris Weisberg
Trustee
On filings since 2021
No compensation reported
Daniel H. O'Malley
Trustee
On filings since 2021
No compensation reported
Edward J. O'Malley
Trustee
On filings since 2021
No compensation reported
Pauline Weisberg
Vice President
On filings since 2021
No compensation reported
Data from IRS Form 990 filings, 2021–2025. "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 Harris K & Lois G Oppenheimer Foundation
How much does Harris K & Lois G Oppenheimer Foundation give each year?
Harris K & Lois G Oppenheimer Foundation gave $163K across 51 grants in 2025, according to its 2025 IRS Form 990-PF. In 2024 it gave $156K across 52 grants.
What is Harris K & Lois G Oppenheimer Foundation's typical grant size?
Harris K & Lois G Oppenheimer Foundation's median grant in 2025 was $2,000, and its average grant was $3,187, across 51 grants on its 2025 IRS Form 990-PF. Organizations receiving their first grant from Harris K & Lois G Oppenheimer Foundation that year got $2K on average.
Where does Harris K & Lois G Oppenheimer Foundation give grants?
Harris K & Lois G Oppenheimer Foundation gives mostly in Texas: 71% of the grant dollars itemized on its 2025 IRS Form 990-PF went to recipients there. The next largest states were New York (15%) and Colorado (8%). The most frequent recipient cities were San Antonio, TX (25 grants), Austin, TX (6 grants), New York, NY (5 grants) and Dallas, TX (3 grants).
Does Harris K & Lois G Oppenheimer Foundation give general operating support?
Yes: 100% of Harris K & Lois G Oppenheimer Foundation's 2025 grants with a stated purpose (51 of 51) were for general or operating support, per its 2025 IRS Form 990-PF.
Who are Harris K & Lois G Oppenheimer Foundation's largest grantees?
Harris K & Lois G Oppenheimer Foundation's largest 2025 grantees include World Monuments Fund ($20,000), Klrnalamo Public Telecommunications Council ($13,000) and Texas Public Radio ($13,000), according to its 2025 IRS Form 990-PF. Together they received 28% of its itemized 2025 grant dollars.
How large is Harris K & Lois G Oppenheimer Foundation?
Harris K & Lois G Oppenheimer Foundation reported $2.6M in total assets on its 2025 IRS Form 990-PF. It paid out $172K in qualifying distributions that year, against a required minimum of $185K (roughly 5% of its investment assets). Falling short in one year is not a violation: foundations have until the end of the next year to meet the minimum.
What does Harris K & Lois G Oppenheimer Foundation fund?
No foundation mission statement is provided. Its 2025 grants include support for organizations with varied missions. For example, Texas Public Radio says its mission is to “engage, inspire and inform,” bringing people together to better understand their community and world. See mission & focus areas ↑
How do I apply for a grant from Harris K & Lois G Oppenheimer Foundation?
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 Harris K & Lois G Oppenheimer Foundation's EIN?
Harris K & Lois G Oppenheimer Foundation's EIN (Employer Identification Number) is 74-2347610. IRS Form 990 filing data is available on this page for 2021–2025.
Does Harris K & Lois G Oppenheimer 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 September 2026.
Data update history
(1)
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2021–2025
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Cite this profile
Grantable. (2026). Harris K & Lois G Oppenheimer Foundation funder profile. GrantGraph. Retrieved October 23, 2026, from https://grantable.co/funders/harris-k-and-lois-g-oppenheimer-foundation-morg_fe99260f265e4d8c9939c084d0c7fd54
BibTeX
@misc{grantable_742347610_2026,
author = {{Grantable}},
title = {{Harris K \& Lois G Oppenheimer Foundation funder profile}},
howpublished = {GrantGraph},
year = {2026},
url = {https://grantable.co/funders/harris-k-and-lois-g-oppenheimer-foundation-morg_fe99260f265e4d8c9939c084d0c7fd54},
note = {Accessed 2026-10-23. 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 Harris K & Lois G Oppenheimer 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.
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