Seisolo Foundation
Seisolo Foundation is a private foundation based in Boulder, Colorado. Its 2024 filing is marked as its final return, so the foundation appears to have wound down or stopped grantmaking.
Seisolo Foundation at a glance
In short: Seisolo Foundation gave $4.4M across 11 grants in 2024 (avg $401K), mostly in Indiana. 10% of 2024 grantees were new. Source: 2024 IRS Form 990-PF.
- Annual giving (2024)
- $4,405,540
- +495.3% vs 2023
- Grants made (2024)
- 11
- +0.0% vs 2023
- Average grant
- $400,504
- +495.3% vs 2023
- Median grant
- $60,000
- New grantees (estimate)
- 10% first-time grantees (1 of 10, 2024; small sample)
- Primary geography
- Indiana (83% of itemized 2024 grant dollars)
- Latest 990 filing
- Form 990-PF, 2024 View filing
Data from IRS Form 990-PF, 2024; updated September 2026. New grantees are estimated by matching recipient names across years (methodology).
How to apply to Seisolo 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. Because its 2024 filing is marked as final, this should not be treated as a current application process.
- Contact
Mailing address: 440 College Avenue, Boulder, CO 80302
Phone: (720) 406-7450
Application details from Grantable's research on the foundation's public materials; confirm on its website before applying.
Who Seisolo Foundation funds
How this funder distributes its grants
Top Recipients
Top 9 recipients in 2024
The largest 2024 recipient was Renaissance Charitable Foundation Inc FBO Seisolo Charitable Fund ($3.7M). Together the top 9 received $4.4M.
Organizations only. It also paid 1 individual scholarship ($7,500), which are not listed by name.
Grant Size Distribution
60 grants across all recorded years
The most common grant size was under $50K: 29 grants of 60 (48%).
Geographic Focus
Where this funder awards grants
In 2024, reported grant dollars went to recipients in Indiana (83%), Colorado (12%), New York (5%), and Minnesota (0%, rounded). The listed grants included support for organizations in Boulder and elsewhere in Colorado, as well as recipients in Indiana, New York, and Minnesota.
Grant Distribution by State
Share of 2024 grant dollars across all 11 itemized grants.
Cities
Is Seisolo Foundation open to new grantees?
10%
first-time grantees, 2024
In 2024, 1 of 10 grantees (10%) were first-time recipients. With only 10 grantees, that is a small sample: one grantee more or less moves the share by about 10 points. First grants averaged $3.7M; repeat grants $83K. How we count
Medians: $3.7M first-time, $50K repeat.
- 90% of 2024 grantees were also funded in 2023. Method
- Giving grew 628% from 2021 to 2024. Method
- In 2024 it paid out well above its IRS minimum distribution (the 5% rule). Method
Estimate from itemized grant lists in IRS Form 990-PF filings (2020–2024). 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 2024, annual grant giving ranged from $430K (2020) to $4.4M (2024). In 2024 it made 11 grants totaling $4.4M.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Renaissance Charitable Foundation Inc FBO Seisolo Charitable Fund Indianapolis, IN | Transfer of all assets to the donor advised fund. | $3,655,540 |
| Columbia University Trifunac-Thurnauer Fund New York, NY | Scholarship fund to support students pursuing majors within the division of natural sciences, with a preference for chemistry majors. | $200,000 |
| University of Colorado Foundation Boulder, CO | Gift designated to increase the endowment of noris graduate student awards fund. Provides support for awards to graduate students in the college of music at the university of Colorado boulder. | $200,000 |
| Boulder Bach Festival Boulder, CO | Support for boulder bach festival concerts and educational programming (students range from grade school through adults). The funds will be used for programming that can be interchangeable and adaptable between live and online as necessary in recognition of impact of covid-19. | $150,000 |
| Colo Music Festivalctr for Musical Arts Lafayette, CO | Heartstrings program ensures that every student is able to access music study and performance. Specifically, a combination of online and in person classes will be offered. The funds will support collaborations with I have a dream of Boulder county students. | $60,000 |
| Colo Music Festivalctr for Musical Arts Lafayette, CO | The festival fellows program supports the goal of addressing the issue of underrepresentation of people of color in classical music by hosting aspiring professional musicians to serve as festival fellows. The program will advance the fellows' experience and knowledge within a broad spectrum of performance and educational opportunities. | $60,000 |
| Boulder Philharmonic Orchestra Education Boulder, CO | Support community outreach to young students (preschool through high school) through in-school music education and the discovery concerts. All together the programs reach over 800 students each season. | $50,000 |
| Community Food Share Louisville, CO | Mission to be a leader in ending hunger in boulder and Broomfield counties, Colorado | $10,000 |
| 1 individual scholarship Recipients not named | — | $7,500 |
| St Paul Central HS Scholarship Fund St. Paul, MN | To provide post- high school scholarships for low-income students. | $7,500 |
Ready to take the next step with Seisolo 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 |
|---|---|---|---|---|---|---|---|---|
| 2024 | — | $131,419 | $4,432,088 | $4,405,540 | 11 | $4,415,575 | $114,906 | $135,164 |
| 2023 | $4,300,669 | $150,752 | $776,050 | $740,000 | 11 | $744,560 | $119,262 | $274,356 |
| 2022 | $4,925,252 | $90,272 | $725,222 | $685,000 | 12 | $690,010 | $64,079 | $315,274 |
| 2021 | $5,560,202 | $668,579 | $657,928 | $605,000 | 14 | $609,160 | $619,811 | $272,127 |
| 2020 | $5,549,551 | $79,293 | $481,681 | $430,000 | 12 | — | $63,744 | $312,224 |
Under IRS private-foundation payout rules, Seisolo Foundation reported a distributable amount of $135K for 2024 — 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 2024 grants included scholarship support for students, graduate awards, music education and performances, and food assistance.
Among its grantees, the University of Colorado Foundation describes its role as receiving, managing, and investing gifts for the benefit of the University of Colorado. Community Food Share describes its mission as eliminating hunger in Boulder and Broomfield counties through engagement, collaboration, and leadership. Renaissance Charitable Foundation describes itself as a public benefit corporation that supports religious, charitable, educational, and other programs.
Grantmaking
In 2024, the foundation reported 11 grants totaling $4,405,540. Grant amounts ranged from $5,000 to $3,655,540, with a median of $60,000. The largest grant was a $3,655,540 transfer of all assets to a donor-advised fund at Renaissance Charitable Foundation.
Other notable 2024 grants included $200,000 to Columbia University’s Trifunac-Thurnauer Fund for a scholarship fund, $200,000 to the University of Colorado Foundation for graduate student awards in the College of Music, and $150,000 to Boulder Bach Festival for concerts and educational programming. Colorado Music Festival Center for Musical Arts received two grants of $60,000 each, for its Heartstrings program and Festival Fellows program. Other recipients included Boulder Philharmonic Orchestra Education ($50,000), Community Food Share ($10,000), an individual recipient ($7,500), an individual recipient Central High School Scholarship Fund ($7,500), and OUR Center ($5,000).
Leadership & Key People
Leadership team and compensation from IRS filings
The 2024 filing lists Marion Thurnauer as president and treasurer, and Alexander Trifunac as secretary.
Seisolo Foundation is led by Marion Thurnauer, President & Treasurer on every filing since 2020; none of the 2 officers listed in 2024 report compensation.
Officers on the 2024 filing
Marion Thurnauer
President & Treasurer
On filings since 2020
2 hrs/week
No compensation reported
Alexander Trifunac
Secretary
On filings since 2020
1 hr/week
No compensation reported
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 Seisolo Foundation
How much does Seisolo Foundation give each year?
Seisolo Foundation gave $4.4M across 11 grants in 2024, according to its 2024 IRS Form 990-PF. In 2023 it gave $740K across 11 grants.
What is Seisolo Foundation's typical grant size?
Seisolo Foundation's median grant in 2024 was $60,000, and its average grant was $400,504, across 11 grants on its 2024 IRS Form 990-PF. Organizations receiving their first grant from Seisolo Foundation that year got $3.7M on average.
Where does Seisolo Foundation give grants?
Seisolo Foundation gives mostly in Indiana: 83% of the grant dollars itemized on its 2024 IRS Form 990-PF went to recipients there. The next largest state was Colorado (12%). The most frequent recipient cities were Boulder, CO (3 grants) and Lafayette, CO (2 grants).
Does Seisolo Foundation give general operating support?
Not in 2024: none of the 11 grants with a stated purpose on Seisolo Foundation's 2024 IRS Form 990-PF were described as general or operating support.
Who are Seisolo Foundation's largest grantees?
Seisolo Foundation's largest 2024 grantees include Renaissance Charitable Foundation Inc FBO Seisolo Charitable Fund ($3,655,540), Columbia University Trifunac-Thurnauer Fund ($200,000) and University of Colorado Foundation ($200,000), according to its 2024 IRS Form 990-PF. It also paid 1 individual scholarship ($7,500), which are not listed by name. Together they received 92% of its itemized 2024 grant dollars.
What does Seisolo Foundation fund?
No foundation mission statement is provided. Its 2024 grants included scholarship support for students, graduate awards, music education and performances, and food assistance. See mission & focus areas ↑
How do I apply for a grant from Seisolo Foundation?
The foundation states that it makes contributions only to preselected charitable organizations and does not accept unsolicited requests. Eligibility and process details are in the grantmaking section of this profile. See how to apply ↑
How much is Seisolo Foundation required to give away each year?
Private foundations must generally distribute about 5% of their assets annually. For 2024, Seisolo Foundation reported a distributable amount of $135K on its IRS Form 990-PF — the minimum it must pay out in qualifying distributions.
What is Seisolo Foundation's EIN?
Seisolo Foundation's EIN (Employer Identification Number) is 45-3811029. IRS Form 990 filing data is available on this page for 2020–2024.
Does Seisolo Foundation accept unsolicited proposals?
No, according to Grantable's research on the foundation's published guidelines. See how to apply ↑
Data last updated September 2026. Sourced from IRS Form 990-PF filings. Research dossier generated September 2026.
Data update history
(6)
When this profile's IRS filing data changed on Grantable
- Updated Form 990-PF for fiscal year 2020 (received by the IRS May 13, 2021)
- Updated Form 990-PF for fiscal year 2021 (received by the IRS May 16, 2022)
- Updated Form 990-PF for fiscal year 2022 (received by the IRS May 9, 2023)
- Updated Form 990-PF for fiscal year 2023 (received by the IRS May 8, 2024)
- Updated Form 990-PF for fiscal year 2024 (received by the IRS May 7, 2025)
- IRS filings on file for fiscal years 2020–2024
Live grants for the work Seisolo Foundation funds
Philanthropy, Voluntarism & Grantmaking Open opportunities, soonest deadline first.
Explore Open Grants
Browse active grant opportunities in Seisolo Foundation's focus areas in our free grants database
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Cite this profile
Grantable. (2026). Seisolo Foundation funder profile. GrantGraph. Retrieved November 1, 2026, from https://grantable.co/funders/seisolo-foundation-morg_2b1866e42c8c428ea1f043cd90ccd37b
BibTeX
@misc{grantable_453811029_2026,
author = {{Grantable}},
title = {{Seisolo Foundation funder profile}},
howpublished = {GrantGraph},
year = {2026},
url = {https://grantable.co/funders/seisolo-foundation-morg_2b1866e42c8c428ea1f043cd90ccd37b},
note = {Accessed 2026-11-01. 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 Seisolo 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.
Seisolo Foundation down — hundreds of funders to go?