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.
Key facts about Mainwaring Archive Foundation
In short: Mainwaring Archive Foundation gave $5K across 2 grants in 2023 (avg $2K), mostly in Pennsylvania. Source: 2023 IRS Form 990-PF.
- EIN
- 52-7106931
- Latest 990 filing
- Form 990-PF, 2023
- Annual giving (2023)
- $4,801
- Grants made (2023)
- 2
- Average grant
- $2,401
- Median grant
- $2,401
- Primary geography
- Pennsylvania (100% of itemized 2023 grant dollars)
Data from IRS Form 990-PF, 2023; updated September 2026.
Financial Overview
From 2023 IRS Form 990-PF · View filing
Total Assets
—
-100.0% YoY
Annual Giving
$5K
-4.0% YoY
Grant Count
2
+100.0% YoY
Avg Grant Size
$2K
-52.0% YoY
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Geographic Focus
Where this funder awards grants
Grant Distribution by State
Share of all 2 itemized 2023 grant dollars.
States
Cities
Giving Over Time
Total grant dollars and number of grants per year
Grant Insights
How this funder distributes its grants
Top Recipients
Top 1 recipients in 2023
Grant Size Distribution
4 grants across all recorded years
Giving History
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 |
Financial History
Multi-year comparison from IRS filings
| Metric | 2023 | 2022 | 2021 |
|---|---|---|---|
| Total Assets | — | $20,354 | $42,992 |
| Revenue | $585 | $2,835 | $59 |
| Expenses | $20,930 | $25,482 | $18,344 |
| Qualifying Distributions | $4,801 | $5,000 | $5,000 |
| Net Investment Income | $526 | $382 | — |
| Distributable Amount | — | — | — |
Data update history
When this profile's IRS filing data changed on Grantable
- IRS filings on file for fiscal years 2020–2023
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
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. It holds — in total assets as of 2023.
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.
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