Tumblehome Inc
To inspire young people to imagine themselves as scientists and engineers through the power of story and activities
Tumblehome Inc at a glance
In short: Tumblehome Inc gave $619K across 4 grants in 2024 (avg $155K), mostly in Massachusetts. Source: 2024 IRS Form 990.
- Annual giving (2024)
- $619,462
- +764.0% vs 2023
- Grants made (2024)
- 4
- +100.0% vs 2023
- Average grant
- $154,866
- +332.0% vs 2023
- Median grant
- $175,000
- Total assets
- $122,928
- -59.0% vs 2023
- Primary geography
- Massachusetts (84% of itemized 2024 grant dollars)
- Latest 990 filing
- Form 990, 2024 View filing
Data from IRS Form 990, 2024; updated September 2026.
Who Tumblehome Inc funds
How this funder distributes its grants
Top Recipients
Top 4 recipients in 2024
The largest 2024 recipient was McLean Hospital ($250K). Together the top 4 received $619K.
Grant Size Distribution
6 grants across all recorded years
The most common grant size was under $50K: 3 grants of 6 (50%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2024 grant dollars across all 4 itemized grants.
States
Cities
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2023 to 2024, annual grant giving ranged from $72K (2023) to $619K (2024). In 2024 it made 4 grants totaling $619K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| McLean Hospital Belmont, MA | Assistance with STEM Education Research | $250,000 |
| Pear & Clover Inc Cambridge, MA | Assistance with STEM Education Research | $250,000 |
| STEM Next Opportunity Fund San Diego, CA | Assistance with STEM Education Research | $100,000 |
| The Concord Consortium Concord, MA | Assistance with STEM Education Research | $19,462 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Net Investment Income |
|---|---|---|---|---|---|---|
| 2024 | $122,928 | $1,368,188 | $1,269,290 | $619,462 | 4 | $3,453 |
| 2023 | $299,729 | $561,465 | $857,848 | $71,700 | 2 | $4,122 |
| 2022 | $331,352 | $614,062 | $555,928 | — | — | $2,907 |
| 2021 | $252,766 | $548,810 | $514,255 | — | — | $134 |
| 2020 | $229,219 | $401,309 | $395,069 | — | — | $834 |
| 2019 | $212,920 | $379,061 | $224,303 | — | — | $3,266 |
About Tumblehome Inc
Based on IRS filings
Tumblehome Inc is a public charity focused on Education, based in Boston, MA. IRS filing data is available from 2019 through 2024. As of 2024, the organization holds $123K in total assets. In 2024, it awarded 4 grants totaling $619K. Net investment income was $3K.
Focus Areas
Leadership & Key People
Officers and directors from IRS filings
Tumblehome Inc is led by Walter Simson, President on every filing since 2019; 2 of 5 officers listed in 2024 are compensated.
Officers on the 2024 filing
Walter Simson
President
On filings since 2019
2 hrs/week
No compensation reported
Pendred Noyce
Secretary
Director → Executive Director, 2021
Executive Director → Secretary, 2023
On filings since 2019
40 hrs/week
$111K (2021) → $78K (2024)
Barnas Monteith
Research
New on the 2024 filing
40 hrs/week
$120K (2024)
Steve Rasmussen
Treasurer
On filings since 2019
1 hr/week
No compensation reported
Gretchen Walker
Member
New on the 2024 filing
1 hr/week
No compensation reported
Former officers (5)
- Former: Bernandine Nash-McClean (2023) — Member
- Former: Elliot Lobel (2019–2022) — Secretary
- Former: Diane Burbano (2021–2022) — Member
- Former: Michele Courton Brown (2021–2022) — Member
- Former: Barnas Montieth (2021) — Research
Data from IRS Form 990 filings, 2019–2024. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2024 IRS filing
The highest reported compensation on the 2024 filing was $120K, to Barnas Monteith (Research). 2 officers or directors reported compensation on that filing.
Frequently asked questions about Tumblehome Inc
How much does Tumblehome Inc give each year?
Tumblehome Inc gave $619K across 4 grants in 2024, according to its 2024 IRS Form 990. In 2023 it gave $72K across 2 grants.
What is Tumblehome Inc's typical grant size?
Tumblehome Inc's median grant in 2024 was $175,000, and its average grant was $154,866, across 4 grants on its 2024 IRS Form 990.
Where does Tumblehome Inc give grants?
Tumblehome Inc gives mostly in Massachusetts: 84% of the grant dollars itemized on its 2024 IRS Form 990 went to recipients there. The next largest state was California (16%).
Does Tumblehome Inc give general operating support?
Not in 2024: none of the 4 grants with a stated purpose on Tumblehome Inc's 2024 IRS Form 990 were described as general or operating support. Recurring purposes include "Assistance with STEM Education Research" (4 grants).
How large is Tumblehome Inc?
Tumblehome Inc reported $123K in total assets on its 2024 IRS Form 990. Its revenue that year was $1.4M.
What is Tumblehome Inc?
Tumblehome Inc is a public charity focused on Education, based in Boston, MA. It holds $123K in total assets as of 2024.
What is Tumblehome Inc's EIN?
Tumblehome Inc's EIN (Employer Identification Number) is 82-4411465. IRS Form 990 filing data is available on this page for 2019–2024.
Data last updated September 2026. Sourced from IRS Form 990 filings.
Data update history
(3)
When this profile's IRS filing data changed on Grantable
- Added Form 990 for fiscal year 2019 (received by the IRS November 16, 2020)
- Updated Form 990 for fiscal year 2024 (received by the IRS November 12, 2025)
- IRS filings on file for fiscal years 2020–2024
Live grants for the work Tumblehome Inc funds
Education Open opportunities, soonest deadline first.
Explore Open Grants
Browse active grant opportunities in Tumblehome Inc's focus areas in our free grants database
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Figures come from Tumblehome Inc'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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