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.
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
About Mainwaring Archive Foundation
Based on IRS filings
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.
Focus Areas
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Geographic Focus
Where this funder awards grants
Grant Distribution by State
States
Cities
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 | — | — | — |
Giving Over Time
Total grant dollars and number of grants per year
Grant Insights
How this funder distributes its grants
Top Recipients
Top 2 recipients in 2023
Grant Size Distribution
4 grants across all recorded years
Giving History
Grant recipients and amounts by year
Among its reported 2023 grants, the largest include American Philosophical Society ($4,768), American Philosophical Society ($33).
| Recipient | Purpose | Amount |
|---|---|---|
| AMERICAN PHILOSOPHICAL SOCIETY PHILADELPHIA, PA | CHARITABLE CONTRIBUTION | $4,768 |
| AMERICAN PHILOSOPHICAL SOCIETY PHILADELPHIA, PA | CHARITABLE CONTRIBUTION | $33 |
Leadership & Key People
Officers and directors from IRS filings
Compensation Overview
From 2023 IRS filing
From 2023 filing
| Name | Title | Hours | Compensation |
|---|---|---|---|
| BROWN BROTHERS HARRIMAN TRUST CO | TRUSTEE | 1 | $29 |
| SUSAN MAINWARING ROBERTS | TRUSTEE | 1 | — |
Subject Areas
Focus areas based on grantmaking activity
Frequently Asked Questions
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 size grants does Mainwaring Archive Foundation award?
In 2023, Mainwaring Archive Foundation awarded 2 grants totaling $5K — an average of about $2K per grant, based on its IRS Form 990 filings.
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.
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Data last updated April 2026. Sourced from IRS Form 990-PF filings.
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