The Lambertus Family Foundation makes a small number of very large, targeted grants primarily to elite medical and higher-education institutions. Their recent giving is dominated by multi-million-dollar commitments to Massachusetts General Hospital and the Purdue Foundation, indicating a preference for institutional biomedical/clinical research and university-sponsored programs. Grants are concentrated rather than broadly distributed and tend to be repeat, high-value gifts to a few flagship organizations.
Highly concentrated: very few, large grants (multi-million-dollar) with repeat funding to the same institutions rather than many small awards; geographically centered on Boston institutions but willing to fund prominent out-of-state universities.
Peter and Ann Lambertus Family Foundatio C/o Bartlett Pc’s recent giving is defined by very large general-support grants to a small set of institutions, especially Massachusetts General Hospital and the Purdue Foundation. The largest recent gifts include $10,000,000 to Massachusetts General Hospital in 2023 and $7,000,000 in 2024, alongside $6,000,000 grants to the hospital in 2025 and to Purdue Foundation in 2025. That pattern points to a funder that backs major research, clinical, and university programs through flexible support rather than tightly restricted project grants. Beyond those flagship commitments, the foundation also appears in other institutional arenas, including conservation, arts, and human services, with grants to Harwich Conservation Trust, The Trustees of Reservations, and St Francis House. These awards show a mix of high-dollar anchor funding and smaller support for organizations serving Massachusetts communities and selected national institutions. The overall picture is of a foundation that concentrates its philanthropy rather than spreading it broadly, and that returns repeatedly to a limited number of recipients over multiple years.
In health and biomedical research, the foundation gave $10,000,000 to Massachusetts General Hospital for general support in 2023 and another $7,000,000 in 2024, signaling sustained support for a major clinical institution. In higher education, it gave $6,000,000 to Purdue Foundation in 2025 and $5,000,000 in 2024, both for general support, showing a comparable commitment to university-affiliated work. Its giving also reaches conservation and community institutions. Harwich Conservation Trust received $1,000,000 in 2024 and $500,000 in both 2023 and 2025. The Trustees of Reservations received $100,000 in 2023 and 2024, plus $50,000 in 2025. In human services, St Francis House received $200,000 in 2024 and $100,000 in 2025, and Lexington Arts & Crafts Society received $200,000 in 2023 and $100,000 in both 2024 and 2025.
Typical grant size is $7,500 at the 25th percentile, $10,000 at the median, and $30,000 at the 75th percentile, even though the recent record includes several multimillion-dollar awards. The foundation is a regular funder and its recent history shows repeated grants to the same organizations across multiple years, including Massachusetts General Hospital, Purdue Foundation, Harwich Conservation Trust, The Trustees of Reservations, and Lexington Arts & Crafts Society. Grants are generally listed as general support, indicating flexible, organization-wide funding rather than program-specific awards. No application process is shown in the data.
$13.9M
$297.9M
$46.6M
$14.2M
Most grants fall between $8K and $30K, with a median of $10K.
25th Percentile
$8K
Median
$10K
75th Percentile
$30K
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Notable grantees: Massachusetts General Hospital, Purdue Foundation
Grants are national, but Massachusetts is the top state by grant count and accounts for 34% of grants to recipients in the HQ state. Boston appears often among recipient cities, with awards to Massachusetts General Hospital, Dana Farber Cancer Institute, St Francis House, The Trustees of Reservations, and The Foundation of Mass Eye and Ear. Other recurring recipient locations include Lexington, MA; Harwich, MA; and W. Lafayette, IN. Outside the U.S., the recipient distribution shows no grants.
The recent record is centered on large institutions and organization-wide support. Major recipients include Massachusetts General Hospital and Purdue Foundation, with additional grants to conservation groups, arts organizations, humane societies, and human-service providers. Most awards are labeled general support, which points to flexible funding for operating or institutional needs.
The typical grant size is $7,500 at the 25th percentile, $10,000 at the median, and $30,000 at the 75th percentile. That typical range sits far below the foundation’s largest recent gifts, which reach into the multimillion-dollar range for a few flagship institutions.
Yes. Several recipients appear across multiple years, including Massachusetts General Hospital, Purdue Foundation, Harwich Conservation Trust, The Trustees of Reservations, and Lexington Arts & Crafts Society. The repeated awards suggest a pattern of ongoing support rather than one-time gifts.
Massachusetts is the top state by grant count, with 34% of grants going to recipients in the HQ state. Boston is especially prominent among recipient cities, while other named recipients are in Lexington and Harwich, Massachusetts, and W. Lafayette, Indiana.
2025
Source: IRS Form 990-PF, fiscal year 2025.
Most recent grants reported to the IRS.
| Recipient | Location | Amount | Year | Purpose |
|---|---|---|---|---|
| MASSACHUSETTS GENERAL HOSPITAL | BOSTON, MA | $6,000,000 | 2025 | GENERAL SUPPORT |
| PURDUE FOUNDATION | W LAFAYETTE, IN | $6,000,000 | 2025 | GENERAL SUPPORT |
| HARWICH CONSERVATION TRUST | HARWICH, MA | $500,000 | 2025 | GENERAL SUPPORT |
| LYNCHBURG HUMANE SOCIETY | LYNCHBURG, VA | $120,000 | 2025 | GENERAL SUPPORT |
| LEXINGTON ARTS & CRAFTS SOCIETY | LEXINGTON, MA | $100,000 | 2025 | GENERAL SUPPORT |
| ST FRANCIS HOUSE | BOSOTN, MA | $100,000 | 2025 | GENERAL SUPPORT |
| LEXINGTON SYMPHONY | LEXINGTON, MA | $50,000 | 2025 | GENERAL SUPPORT |
| DOGS DESERVE BETTER | SMITHFIELD, VA | $50,000 | 2025 | GENERAL SUPPORT |
| ANIMAL RESOURCES OF TIDEWATER | NORFOLK, VA | $50,000 | 2025 | GENERAL SUPPORT |
| THE TRUSTEES OF RESERVATIONS | BOSTON, MA | $50,000 | 2025 | GENERAL SUPPORT |
| SFC VIRGINIA | FREDERICKSBURG, VA | $45,000 | 2025 | GENERAL SUPPORT |
| THE HERITAGE FOUNDATION | WASHINGTON, DC | $40,000 | 2025 | GENERAL SUPPORT |
| NORTHEAST COONHOUND RESCUE | LEXINGTON, MA | $40,000 | 2025 | GENERAL SUPPORT |
| PRAGER UNIVERSITY FOUNDATION | SHERMAN OAKS, CA | $40,000 | 2025 | GENERAL SUPPORT |
| HOOVER INSTITUTION | WASHINGTON, DC | $40,000 | 2025 | GENERAL SUPPORT |
| ASSISI ANIMAL CLINICS OF VA | ROANOKE, VA | $40,000 | 2025 | GENERAL SUPPORT |
| AMERICAN ENTERPRISE INSTITUTE | WASHINGTON, DC | $40,000 | 2025 | GENERAL SUPPORT |
| VERMONT ACADEMY | SAXTONS RIVER, VT | $35,000 | 2025 | GENERAL SUPPORT |
| SMYTH ANIMAL RESUCE | MARION, VA | $25,000 | 2025 | GENERAL SUPPORT |
| AUGUSTA DOG ADOPTIONS | WAYNESBORO, VA | $25,000 | 2025 | GENERAL SUPPORT |
| K9 FREEDOM RIDES | ELKTON, VA | $25,000 | 2025 | GENERAL SUPPORT |
| SPCA OF PITTSYLVANIA COUNTY | CHATHAM, VA | $25,000 | 2025 | GENERAL SUPPORT |
| SCOTT COUNTY HUMANE SOCIETY | GEORGETOWN, KY | $25,000 | 2025 | GENERAL SUPPORT |
| CAROLINA COONHOUND RESCUE | CHARLESTON, SC | $20,000 | 2025 | GENERAL SUPPORT |
| HOMEWARD TRAILS ADOPTION CENTER | FAIRFAX STATION, VA | $20,000 | 2025 | GENERAL SUPPORT |
| THE FOUNDATION OF MASS EYE AND EAR | BOSTON, MA | $20,000 | 2025 | GENERAL SUPPORT |
| BEST FRIENDS ANIMAL SOCIETY | KANAB, UT | $20,000 | 2025 | GENERAL SUPPORT |
| TWIN COUNTY HUMANE SOCIETY | HILLSVILLE, VA | $20,000 | 2025 | GENERAL SUPPORT |
| HOUNDSONG RESCUE INC | HAMMOND, IN | $20,000 | 2025 | GENERAL SUPPORTS |
| PAWS OF SWVA | COEBURN, VA | $20,000 | 2025 | GENERAL SUPPORT |
| FRIENDS OF RUSSEL COUNTY ANIMALS | LEBANON, VA | $18,000 | 2025 | GENERAL SUPPORT |
| HALIFAX DOG SQUAD | ALTON, VA | $15,000 | 2025 | GENERAL SUPPORT |
| HUMANE SOCIETY OF SHENANDOAH | WOODSTOCK, VA | $15,000 | 2025 | GENERAL SUPPORT |
| EXTRA MILE EDUCATION FOUNDATION | PITTSBURGH, PA | $15,000 | 2025 | GENERAL SUPPORT |
| ALL HOUNDS ON DECK | MONROE, LA | $15,000 | 2025 | GENERAL SUPPORT |
| AMERICAN BLACK AND TAN COONHOUND RESCUE | CANTON, OH | $15,000 | 2025 | GENERAL SUPPORT |
| PAGE PAWS | LURAY, VA | $15,000 | 2025 | GENERAL SUPPORT |
| NORTHERN ACCOMACK COMMUNITY CATS | NEW CHURCH, VA | $15,000 | 2025 | GENERAL SUPPORT |
| VA FEDERATION OF HUMANE SOCIETIES | EDINBURG, VA | $12,500 | 2025 | GENERAL SUPPORT |
| HILLSDALE COLLEGE | HILLSDALE, MI | $12,000 | 2025 | GENERAL SUPPORT |
| BLUE HORSE MUKWA EQUINE RETIREMENT CENTER | CHASE CITY, VA | $10,000 | 2025 | GENERAL SUPPORT |
| ALLEGHANY HUMANE SOCIETY | CUMBERLAND, MD | $10,000 | 2025 | GENERAL SUPPORT |
| GREEN DOGS UNLEASHED | TROY, VA | $10,000 | 2025 | GENERAL SUPPORT |
| COMMUNITY CAT ALLIANCE | WINCHESTER, VA | $10,000 | 2025 | GENERAL SUPPORT |
| BOSTON SYMPHONY ORCHESTRA | BOSTON, MA | $10,000 | 2025 | GENERAL SUPPORT |
| HOUND HAVEN OF LONE PINE INC | LONE PINE, PA | $10,000 | 2025 | GENERAL SUPPORT |
| SWEET VIRGINA BARN CATS | CLARKSVILLE, VA | $10,000 | 2025 | GENERAL SUPPORT |
| INTERNATIONAL FUND FOR ANIMAL WELFARE | WASHINGTON, DC | $10,000 | 2025 | GENERAL SUPPORT |
| THE SAMPSON FUND FOR VETERINARY CARE | ORLEANS, MA | $10,000 | 2025 | GENERAL SUPPORT |
| CARY MEMORIAL LIBRARY FOUNDATION | LEXINGTON, MA | $7,500 | 2025 | GENERAL SUPPORT |
MASSACHUSETTS GENERAL HOSPITAL
$6,000,000GENERAL SUPPORT
PURDUE FOUNDATION
$6,000,000GENERAL SUPPORT
LEXINGTON ARTS & CRAFTS SOCIETY
$100,000GENERAL SUPPORT
GENERAL SUPPORT
LEXINGTON SYMPHONY
$50,000GENERAL SUPPORT
DOGS DESERVE BETTER
$50,000GENERAL SUPPORT
ANIMAL RESOURCES OF TIDEWATER
$50,000GENERAL SUPPORT
SFC VIRGINIA
$45,000GENERAL SUPPORT
NORTHEAST COONHOUND RESCUE
$40,000GENERAL SUPPORT
HOOVER INSTITUTION
$40,000GENERAL SUPPORT
ASSISI ANIMAL CLINICS OF VA
$40,000GENERAL SUPPORT
VERMONT ACADEMY
$35,000GENERAL SUPPORT
SMYTH ANIMAL RESUCE
$25,000GENERAL SUPPORT
AUGUSTA DOG ADOPTIONS
$25,000GENERAL SUPPORT
K9 FREEDOM RIDES
$25,000GENERAL SUPPORT
SPCA OF PITTSYLVANIA COUNTY
$25,000GENERAL SUPPORT
SCOTT COUNTY HUMANE SOCIETY
$25,000GENERAL SUPPORT
CAROLINA COONHOUND RESCUE
$20,000GENERAL SUPPORT
HOMEWARD TRAILS ADOPTION CENTER
$20,000GENERAL SUPPORT
THE FOUNDATION OF MASS EYE AND EAR
$20,000GENERAL SUPPORT
TWIN COUNTY HUMANE SOCIETY
$20,000GENERAL SUPPORT
HOUNDSONG RESCUE INC
$20,000GENERAL SUPPORTS
PAWS OF SWVA
$20,000GENERAL SUPPORT
FRIENDS OF RUSSEL COUNTY ANIMALS
$18,000GENERAL SUPPORT
HALIFAX DOG SQUAD
$15,000GENERAL SUPPORT
HUMANE SOCIETY OF SHENANDOAH
$15,000GENERAL SUPPORT
ALL HOUNDS ON DECK
$15,000GENERAL SUPPORT
AMERICAN BLACK AND TAN COONHOUND RESCUE
$15,000GENERAL SUPPORT
PAGE PAWS
$15,000GENERAL SUPPORT
NORTHERN ACCOMACK COMMUNITY CATS
$15,000GENERAL SUPPORT
VA FEDERATION OF HUMANE SOCIETIES
$12,500GENERAL SUPPORT
BLUE HORSE MUKWA EQUINE RETIREMENT CENTER
$10,000GENERAL SUPPORT
ALLEGHANY HUMANE SOCIETY
$10,000GENERAL SUPPORT
GREEN DOGS UNLEASHED
$10,000GENERAL SUPPORT
COMMUNITY CAT ALLIANCE
$10,000GENERAL SUPPORT
BOSTON SYMPHONY ORCHESTRA
$10,000GENERAL SUPPORT
HOUND HAVEN OF LONE PINE INC
$10,000GENERAL SUPPORT
SWEET VIRGINA BARN CATS
$10,000GENERAL SUPPORT
THE SAMPSON FUND FOR VETERINARY CARE
$10,000GENERAL SUPPORT
CARY MEMORIAL LIBRARY FOUNDATION
$7,500GENERAL SUPPORT