Stephen Mack and Kelly Mack Familyfoundation Inc
Invitation OnlyNew York, New York · EIN 20-3901963 · Private foundation
Grants paid (2024)$1.1M
Organizations funded10
Typical grant$50,000
Total assets$30K
Half of its grants to organizations were between $7,500 and $250,000.
From the return
How to apply
On its return for tax year 2024 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
30% of grants went outside New York.
Grants paid in tax year 2024
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| Nyu | New York, NY | Exempt purpose | $305,000 |
| Musicians on Call | Nashville, TN | Exempt purpose | $250,000 |
| Nyu Langone Health | New York, NY | Exempt purpose | $250,000 |
| 92Y | New York, NY | Exempt purpose | $122,667 |
| Georgetown University | Washington, DC | Exempt purpose | $87,500 |
| Riverdale Country School | Bronx, NY | Exempt purpose | $50,000 |
| The Schwarzman Animal Medical Center | New York, NY | Exempt purpose | $10,000 |
| Boston Children's Hospital Trust | Boston, MA | Exempt purpose | $7,500 |
| Lustgarten Foundation | Uniondale, NY | Exempt purpose | $1,500 |
| Atlantic Golf Club Educational Fund | Bridgehampton, NY | Exempt purpose | $1,500 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2024 | $1,085,667 | 10 |
| 2023 | $910,667 | 10 |
Sources
- IRS Form 990-PF, tax year 2024, filed Nov 10, 2025 - IRS e-file batch, object ID 202533149349101398
- IRS Tax Exempt Organization Search for EIN 20-3901963
- Profile updated Nov 9, 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.