Mainwaring Archive Foundation
Mainwaring Archive Foundation is a private foundation focused on Science & Technology, based in New York, NY. IRS filing data is available from 2020 through 2023. In 2023, it awarded 2 grants totaling $5K. Net investment income was $526.
Mainwaring Archive Foundation at a glance
In short: Mainwaring Archive Foundation gave $5K across 2 grants in 2023 (avg $2K), mostly in Pennsylvania. Source: 2023 IRS Form 990-PF.
- Annual giving (2023)
- $4,801
- -4.0% vs 2022
- Grants made (2023)
- 2
- +100.0% vs 2022
- Average grant
- $2,401
- -52.0% vs 2022
- Median grant
- $2,401
- Primary geography
- Pennsylvania (100% of itemized 2023 grant dollars)
- Latest 990 filing
- Form 990-PF, 2023 View filing
Data from IRS Form 990-PF, 2023; updated September 2026.
Who Mainwaring Archive Foundation funds
How this funder distributes its grants
Top Recipients
Top recipient in 2023
The largest 2023 recipient was American Philosophical Society ($5K across 2 grants).
Grant Size Distribution
4 grants across all recorded years
The most common grant size was under $50K: 4 grants of 4 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of 2023 grant dollars across all 2 itemized grants.
States
Cities
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2021 to 2023, annual grant giving ranged from $5K (2023) to $5K (2022). In 2023 it made 2 grants totaling $5K.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| American Philosophical Society Philadelphia, PA | Charitable Contribution | $4,768 |
| American Philosophical Society Philadelphia, PA | Charitable Contribution | $33 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Qualifying Distributions | Net Investment Income |
|---|---|---|---|---|---|---|---|
| 2023 | — | $585 | $20,930 | $4,801 | 2 | $4,801 | $526 |
| 2022 | $20,354 | $2,835 | $25,482 | $5,000 | 1 | $5,000 | $382 |
| 2021 | $42,992 | $59 | $18,344 | $5,000 | 1 | $5,000 | — |
| 2020 | $61,277 | $259,469 | $231,059 | — | — | — | $9,027 |
Leadership & Key People
Officers and directors from IRS filings
Mainwaring Archive Foundation's 2023 filing lists 2 officers; 1 of 2 officers listed in 2023 is compensated.
Officers on the 2023 filing
Brown Brothers Harriman Trust CO
Trustee
On filings since 2020
1 hr/week
$427 (2020) → $29 (2023)
Susan Mainwaring Roberts
Trustee
On filings since 2020
1 hr/week
No compensation reported
Former officers (2)
- Former: Bruce Mainwaring Dec (2022) — Trustee
- Former: Bruce Mainwaring (2020–2021) — Trustee
Data from IRS Form 990 filings, 2020–2023. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2023 IRS filing
The highest reported compensation on the 2023 filing was $29, to Brown Brothers Harriman Trust CO (Trustee).
Frequently asked questions about Mainwaring Archive Foundation
How much does Mainwaring Archive Foundation give each year?
Mainwaring Archive Foundation gave $5K across 2 grants in 2023, according to its 2023 IRS Form 990-PF. In 2022 it gave $5K across 1 grant.
What is Mainwaring Archive Foundation?
Mainwaring Archive Foundation is a private foundation focused on Science & Technology, based in New York, NY.
Where does Mainwaring Archive Foundation operate?
Mainwaring Archive Foundation has awarded grants in Montana, Pennsylvania.
What is Mainwaring Archive Foundation's EIN?
Mainwaring Archive Foundation's EIN (Employer Identification Number) is 52-7106931. IRS Form 990 filing data is available on this page for 2020–2023.
Data last updated September 2026. Sourced from IRS Form 990-PF filings.
Data update history
(1)
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2020–2023
Live grants for the work Mainwaring Archive Foundation funds
Science & Technology Open opportunities, soonest deadline first.
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Browse active grant opportunities in Mainwaring Archive Foundation's focus areas in our free grants database
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Figures come from Mainwaring Archive 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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