The Michael & Leah Weisberg Family Foundation concentrates its philanthropy on a very small set of large, unrestricted grants, primarily in New York City. Their giving is split between a major cultural beneficiary (the New York Historical Society) and significant support for medical/clinical work at NYU Langone (FACES), with occasional use of donor-advised vehicles. Grants are repeat, general-purpose awards rather than many small project-specific gifts.
Highly concentrated: a few large, general-purpose grants make up the majority of giving; repeat multi-year or multiple grants to the same core institutions rather than broad, diversified funding.
A small set of large, general-purpose grants defines the Michael & Leah Weisberg Family Foundation’s giving, with two New York City institutions accounting for the biggest awards in the recent record. The New York Historical Society Museum & Library received $314,670 in 2023, $247,000 in 2024, and $244,560 in 2025, while NYU Langone - Faces received $150,000 in 2023, $250,000 in 2024, and $247,500 in 2025. Both grantees point to a pattern of sustained support rather than one-off project funding. The foundation’s recent activity also shows some room for smaller cultural and community gifts, but the scale is uneven: most of the high-dollar giving is concentrated in unrestricted awards to a few organizations. Alongside the major museum and medical grants, the record includes support for Uja Federation, the Whitney Museum, the American Academy in Rome, Museum of Modern Art, Parrish Art Museum, and the Metropolitan Museum. The recurring use of general-purpose language suggests flexibility in how the foundation deploys capital, with relationships that extend across multiple years. That mix places the foundation among local New York funders whose philanthropy is centered on institutions rather than individuals, with a strong emphasis on repeat support.
In cultural philanthropy, the foundation has backed the New York Historical Society Museum & Library with repeated general-purpose grants at three different levels across 2023, 2024, and 2025. The same pattern appears in medical and clinical support through NYU Langone - Faces, which also received general-purpose funding in each of those years. Its giving reaches beyond those two anchors. In 2024, Uja Federation received $24,220, showing support for a broader community organization. The arts portfolio also includes the Whitney Museum, which received $14,650 in 2023 and $14,600 in 2024, and the Museum of Modern Art, which appears three times in the recent record with smaller general-purpose awards in 2023, 2024, and 2025. The foundation also gave to the American Academy in Rome and the Parrish Art Museum.
Typical grant size is highly skewed toward larger awards: p25 is $1,110, median is $21,910, and p75 is $245,170. That spread matches a pattern of a few substantial general-purpose grants alongside smaller cultural gifts. The recent record also shows repeat recipients across multiple years, especially the New York Historical Society Museum & Library and NYU Langone - Faces. The foundation gives directly to nonprofits and also used a donor-advised vehicle, Sterling Donor Advised Fund, in 2023. The available record does not show individual funding or program-related investments.
$513K
$2.7M
$195K
$530K
Most grants fall between $1K and $245K, with a median of $22K.
25th Percentile
$1K
Median
$22K
75th Percentile
$245K
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Notable grantees: New York Historical Society Museum & Library, NYU Langone - FACES, Sterling Donor Advised Fund
The foundation gives locally, and 94% of its grants go to recipients in New York State. All listed recent grants went to US recipients. New York City is the clear center of gravity: New York, NY appears repeatedly for the New York Historical Society Museum & Library, NYU Langone - Faces, Uja Federation, the Whitney Museum, the Museum of Modern Art, the American Academy in Rome, the Parrish Art Museum, and the Metropolitan Museum. One exception in the recent list is Sterling Donor Advised Fund in Reston, VA.
The recent record points to major New York City cultural institutions and medical/clinical work. Repeated general-purpose grants went to the New York Historical Society Museum & Library and NYU Langone - Faces, while other gifts supported the Whitney Museum, Museum of Modern Art, Uja Federation, the American Academy in Rome, the Parrish Art Museum, and the Metropolitan Museum.
Its grant sizes are very uneven. The 25th percentile is $1,110, the median is $21,910, and the 75th percentile is $245,170, which reflects a mix of smaller cultural gifts and much larger general-purpose awards to a few recurring recipients.
Yes. The New York Historical Society Museum & Library appears in 2023, 2024, and 2025, and NYU Langone - Faces also appears in all three years. The Whitney Museum is another repeat recipient, with grants in 2023 and 2024.
The foundation gives locally, with 94% of grants to recipients in New York State. In the recent list, most recipients are in New York, NY, with one grant to Sterling Donor Advised Fund in Reston, VA.
The recent grants show two core areas: support for New York City cultural institutions and support for medical/clinical initiatives at NYU Langone - Faces. General-purpose funding is the common thread across both areas, including repeated awards to the museum and the medical program.
2025
Source: IRS Form 990-PF, fiscal year 2025.
Most recent grants reported to the IRS.
| Recipient | Location | Amount | Year | Purpose |
|---|---|---|---|---|
| NYU LANGONE - FACES | NEW YORK, NY | $247,500 | 2025 | GENERAL PURPOSE |
| NEW YORK HISTORICAL SOCIETY MUSEUM & LIBRARY | NEW YORK, NY | $244,560 | 2025 | GENERAL PURPOSE |
| WHITNEY MUSEUM | NEW YORK, NY | $19,600 | 2025 | GENERAL PURPOSE |
| MUSEUM OF MODERN ART | NEW YORK, NY | $944 | 2025 | GENERAL PURPOSE |
| NYU LANGONE - FACES | NEW YORK, NY | $250,000 | 2024 | GENERAL PURPOSE |
| NEW YORK HISTORICAL SOCIETY MUSEUM & LIBRARY | NEW YORK, NY | $247,000 | 2024 | GENERAL PURPOSE |
| UJA FEDERATION | NEW YORK, NY | $24,220 | 2024 | GENERAL PURPOSE |
| WHITNEY MUSEUM | NEW YORK, NY | $14,600 | 2024 | GENERAL PURPOSE |
| MUSEUM OF MODERN ART | NEW YORK, NY | $896 | 2024 | GENERAL PURPOSE |
| NEW YORK HISTORICAL SOCIETY MUSEUM & LIBRARY | NEW YORK, NY | $314,670 | 2023 | GENERAL PURPOSE |
| NYU LANGONE - FACES | NEW YORK, NY | $150,000 | 2023 | GENERAL PURPOSE |
| STERLING DONOR ADVISED FUND | RESTON, VA | $100,000 | 2023 | GENERAL PURPOSE |
| AMERICAN ACADEMY IN ROME | NEW YORK, NY | $14,650 | 2023 | GENERAL PURPOSE |
| MUSEUM OF MODERN ART | NEW YORK, NY | $1,165 | 2023 | GENERAL PURPOSE |
| PARRISH ART MUSEUM | NEW YORK, NY | $750 | 2023 | GENERAL PURPOSE |
| METROPOLITAN MUSEUM | NEW YORK, NY | $210 | 2023 | GENERAL PURPOSE |
NYU LANGONE - FACES
$247,500GENERAL PURPOSE
NEW YORK HISTORICAL SOCIETY MUSEUM & LIBRARY
$244,560GENERAL PURPOSE
WHITNEY MUSEUM
$19,600GENERAL PURPOSE
MUSEUM OF MODERN ART
$944GENERAL PURPOSE
NYU LANGONE - FACES
$250,000GENERAL PURPOSE
NEW YORK HISTORICAL SOCIETY MUSEUM & LIBRARY
$247,000GENERAL PURPOSE
UJA FEDERATION
GENERAL PURPOSE
WHITNEY MUSEUM
$14,600GENERAL PURPOSE
MUSEUM OF MODERN ART
$896GENERAL PURPOSE
NEW YORK HISTORICAL SOCIETY MUSEUM & LIBRARY
$314,670GENERAL PURPOSE
NYU LANGONE - FACES
$150,000GENERAL PURPOSE
STERLING DONOR ADVISED FUND
$100,000GENERAL PURPOSE
AMERICAN ACADEMY IN ROME
$14,650GENERAL PURPOSE
MUSEUM OF MODERN ART
$1,165GENERAL PURPOSE
PARRISH ART MUSEUM
$750GENERAL PURPOSE
METROPOLITAN MUSEUM
$210GENERAL PURPOSE