Mac Five Foundation Inc
Invitation OnlyLincoln, Massachusetts · EIN 36-4507175 · Private foundation
Grants paid (2025)$17.7M
Organizations funded4
Typical grant$347,595
Total assets$199.7M
Half of its grants to organizations were between $275,065 and $8,100,000.
From the return
How to apply
On its return for tax year 2025 the foundation checked the box saying it only makes contributions to preselected charitable organizations and does not accept unsolicited requests for funds.
What it funds
Share of grant lines on the latest return, classified from the purpose each grant states.
Where it gives
100% of grants went outside Massachusetts.
Grants paid in tax year 2025
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| Jsm Charitable Trust | St Louis, MO | General support | $9,000,000 |
| Washington University | St Louis, MO | General support | $8,100,000 |
| Glenview - Mercury Family Foundation | St Louis, MO | General support | $347,595 |
| Starpatch Foundation | St Louis, MO | General support | $275,065 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2025 | $17,722,660 | 4 |
| 2024 | $15,313,000 | 33 |
| 2023 | $8,494,500 | 40 |
Sources
- IRS Form 990-PF, tax year 2025, filed May 15, 2026 - IRS e-file batch, object ID 202631359349101833
- IRS Tax Exempt Organization Search for EIN 36-4507175
- Profile updated Nov 6, 2026
Facts on this page come from the foundation's own IRS Form 990-PF filings as published by the IRS. Grantvello does not know whether a foundation is accepting proposals right now: a past grant is not an open opportunity. Always confirm current guidelines with the funder before applying.