Oak Tree Charitable Foundation concentrates its giving on the California thoroughbred and equine community, funding veterinary research, racehorse retirement/rehabilitation, and medical care for horses alongside worker-focused supports for backstretch employees and industry families. The foundation also funds human services tied to that community — notably substance abuse counseling and cancer support — and directs most grants to local California organizations and institutions connected to the horse‑racing ecosystem. Its approach blends multi‑year or repeat support for core equine and worker‑support organizations with several sizable single grants to university research programs.
Oak Tree Charitable Foundation’s recent giving is anchored in the California thoroughbred and equine ecosystem, with repeated support for horse health research, racehorse retirement and rehabilitation, and services for the people who work in the industry. A defining part of the portfolio is its ongoing funding for equine research organizations, including Grayson-Jockey Club Research Foundation and UC Davis veterinary programs, alongside direct support for racehorse care through Southern California Equine Foundation and CARMA. The foundation also makes regular grants for worker support and counseling, reflecting a concern for the backstretch workforce and racing community families. In the recent grants list, Edwin J Gregson Foundation received $105,000 to support workers in the California horse racing industry, while Cancer Support Community Pasadena received $100,000 to provide support to families and communities impacted by cancer. The pattern shows a funder that combines research, animal welfare, and human services within a tightly defined regional context. Many of the largest grants go to organizations in California, especially those tied to Arcadia, Pasadena, and Davis, but the foundation also supports a small set of national equine organizations connected to racing health and safety.
In equine health research, the foundation gave $85,000 to Grayson-Jockey Club Research Foundation for research to promote equine health and welfare, and $50,000 to UC Davis Foundation Co School of Veterinary Medicine. It also backed racehorse safety work with $50,000 to Uc Davis Foundation for research to promote racehorse health and safety. For rehabilitation and retirement, Oak Tree Charitable Foundation awarded $35,000 to Carma in 2024 and another $35,000 in 2025 to support rehabilitation, training and retirement for California-raced Thoroughbred horses. A separate $50,000 grant to Southern California Equine Foundation supported medical care for horses. The foundation also funds human supports tied to racing. It gave $50,000 in three consecutive years to Winners Foundation for substance abuse counseling, and $42,500 to California Thoroughbred Horsemen's Foundation for the Del Mar Thoroughbred Club summer program providing meals to backstretch horse care employees. Cancer Support Community Pasadena received grants for support to families and communities impacted by cancer.
$429K
$7.6M
$504K
$600K
Most grants fall between $4K and $50K, with a median of $28K.
25th Percentile
$4K
Median
$28K
75th Percentile
$50K
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Concentrated, mid‑to‑large grants largely focused on a small set of recurring grantees in the California thoroughbred ecosystem; funding mixes institutional research gifts (universities and industry research foundations) with program support for industry worker welfare and animal retirement/rehab programs.
Notable grantees: Grayson‑Jockey Club Research Foundation, Winners Foundation, Edwin J. Gregson Foundation, CARMA (California retirement/retraining programs), UC Davis (veterinary/racehorse safety research)
Typical grant sizes cluster around a median of $27,500, with a first quartile of $3,750 and a third quartile of $50,000. The portfolio includes both recurring and one-off grants: Winners Foundation appears in 2023, 2024, and 2025 at $50,000 each year, and several equine-health grantees also recur across multiple years. The foundation does not fund individuals and does not make program-related investments. Its recent grants suggest a pattern of direct program support and general support, with repeated awards to a core set of California-based organizations rather than a broad, one-time-only cycle.
Giving is heavily California-centered: 55% of grants go to recipients in the foundation’s headquarters state. Arcadia appears frequently, including several horse-industry and worker-support grantees, while Pasadena and Davis are also recurring recipient cities. Outside California, the main recipient locations are Lexington, Kentucky, and Lexington, Kansas, both tied to equine research and racing oversight organizations. All recent grants in the dataset go to U.S. recipients.
Its grants center on the California thoroughbred and equine community. Recent awards supported equine health research, horse retirement and rehabilitation, backstretch worker meals and support, substance abuse counseling, and cancer support services for families and communities in Southern California.
The recent grant distribution shows a p25 of $3,750, a median of $27,500, and a p75 of $50,000. That range reflects a mix of smaller support grants and repeated larger awards to core organizations.
Yes. Winners Foundation received $50,000 in 2023, 2024, and 2025 for substance abuse counseling. CARMA also received grants in 2023, 2024, and 2025 for rehabilitation, training and retirement for California-raced Thoroughbred horses.
California is the primary grant destination, with 55% of grants going to recipients in that state. Recent recipient cities include Arcadia, Pasadena, and Davis, with additional grants to organizations in Lexington, Kentucky and Lexington, Kansas.
No. The foundation does not fund individuals and does not make program-related investments, based on the profile data provided.
2026
Source: IRS Form 990-PF, fiscal year 2026.
Most recent grants reported to the IRS.
| Recipient | Location | Amount | Year | Purpose |
|---|---|---|---|---|
| WINNERS FOUNDATION | ARCADIA, CA | $100,000 | 2026 | SUBSTANCE ABUSE COUNSELING |
| CARMA | ARCADIA, CA | $60,000 | 2026 | SUPPORT REHABILITATION, TRAINING AND RETIREMENT FOR CALIFORNIA-RACED THROUGHBRED HORSES. |
| THE FOUNDATION FOR THE HORSE | LEXINGTON, KY | $52,500 | 2026 | IMPROVING HORSE HEALTH AND WELL BEING |
| UC DAVIS FOUNDATION | DAVIS, CA | $50,000 | 2026 | TO SUPPORT EQUINE VETERINARY RESEARCH |
| GRAYSON-JOCKEY CLUB RESEARCH FOUNDATION | NEW YORK, NY | $50,000 | 2026 | SUPPORT RESEARCH TO PROMOTE EQUINE HEALTH AND WELFARE. |
| CALIFORNIA THOROUGHBRED HORSEMEN'S FOUNDATION | ARCADIA, CA | $45,000 | 2026 | TO SUPPORT THE DEL MAR THOROUGHBRED CLUB SUMMER PROGRAM PROVIDING MEALS TO BACKSTRETCH HORSE CARE EMPLOYEES. |
| EDWIN J GREGSON FOUNDATION | ARCADIA, CA | $35,000 | 2026 | TO SUPPORT SCHOLARSHIPS TO CHILDREN OF RACING EMPLOYEES |
| RACING MEDICATION TESTING CONSORTIUM | LEXINGTON, KY | $25,000 | 2026 | SUPPORT ANTI-DOPING RESEARCH FOR HORSE RACING. |
| CANCER SUPPORT COMMUNITY PASADENA | PASADENA, CA | $10,000 | 2026 | PROVIDING SUPPORT TO FAMILIES AND COMMUNITIES IMPACTED BY CANCER |
| EDWIN CHARLES FOUNDATION | BEVERLY HILLS, CA | $1,000 | 2026 | TO SUPPORT THE FOUNDATION |
| UC DAVIS FOUNDATION CO SCHOOL OF VETERINARY MEDICINE | DAVIS, CA | $50,000 | 2025 | TO SUPPORT THE FOUNDATION |
| GRAYSON-JOCKEY CLUB RESEARCH FOUNDATION | LEXINGTON, KY | $50,000 | 2025 | SUPPORT RESEARCH TO PROMOTE EQUINE HEALTH AND WELFARE. |
| WINNERS FOUNDATION | ARCADIA, CA | $50,000 | 2025 | SUBSTANCE ABUSE COUNSELING |
| CANCER SUPPORT COMMUNITY PASADENA | PASADENA, CA | $50,000 | 2025 | PROVIDING SUPPORT TO FAMILIES AND COMMUNITIES IMPACTED BY CANCER |
| CALIFORNIA THOROUGHBRED HORSEMEN'S FOUNDATION | ARCADIA, CA | $42,500 | 2025 | TO SUPPORT THE DEL MAR THOROUGHBRED CLUB SUMMER PROGRAM PROVIDING MEALS TO BACKSTRETCH HORSE CARE EMPLOYEES. |
| CARMA | ARCADIA, CA | $35,000 | 2025 | SUPPORT REHABILITATION, TRAINING AND RETIREMENT FOR CALIFORNIA-RACED THROUGHBRED HORSES. |
| RACING MEDICATION TESTING CONSORTIUM | LEXINGTON, KS | $27,500 | 2025 | SUPPORT ANTI-DOPING RESEARCH FOR HORSE RACING. |
| THE JOCKEY CLUB SAFETY NET FOUNDATION | NEW YORK, NY | $5,000 | 2025 | TO SUPPORT THE FOUNDATION |
| RACING OFFICIALS ACCREDITATION PROGRAM | LEXINGTON, KY | $2,500 | 2025 | IMPROVING HORSE HEALTH AND WELL BEING |
| EQUINE DISEASE COMMUNICATION CENTER | LEXINGTON, KY | $2,500 | 2025 | TO SUPPORT THE FOUNDATION |
| EDWIN J GREGSON FOUNDATION | ARCADIA, CA | $105,000 | 2024 | SUPPORT WORKERS IN THE CALIFORNIA HORSE RACING INDUSTRY |
| CANCER SUPPORT COMMUNITY PASADENA | PASADENA, CA | $100,000 | 2024 | PROVIDING SUPPORT TO FAMILIES AND COMMUNITIES IMPACTED BY CANCER |
| WINNERS FOUNDATION | ARCADIA, CA | $50,000 | 2024 | SUBSTANCE ABUSE COUNSELING |
| GRAYSON-JOCKEY CLUB RESEARCH FOUNDATION | LEXINGTON, KY | $50,000 | 2024 | SUPPORT RESEARCH TO PROMOTE EQUINE HEALTH AND WELFARE. |
| CARMA | ARCADIA, CA | $35,000 | 2024 | SUPPORT REHABILITATION, TRAINING AND RETIREMENT FOR CALIFORNIA-RACED THROUGHBRED HORSES. |
| CALIF THOROUGHBRED HORSEMEN'S FOUNDATION | ARCADIA, CA | $25,000 | 2024 | TO SUPPORT THE DEL MAR THOROUGHBRED CLUB SUMMER PROGRAM PROVIDING MEALS TO BACKSTRETCH HORSE CARE EMPLOYEES. |
| AAEP FOUNDATION DBATHE FOUNDATION FOR THE HORSE | LEXINGTON, KY | $2,500 | 2024 | IMPROVING HORSE HEALTH AND WELL BEING |
| RACING OFFICIALS ACCREDITATION PROGRAM | LEXINGTON, KY | $2,500 | 2024 | IMPROVING HORSE HEALTH AND WELL BEING |
| RACING MEDICATION TESTING CONSORTIUM | LEXINGTON, KS | $2,500 | 2024 | SUPPORT ANTI-DOPING RESEARCH FOR HORSE RACING. |
| HORSE RACING WOMEN'S SUMMIT | BEVERLY HILLS, CA | $2,000 | 2024 | TO SUPPORT THE 2022 HORSE RACING WOMEN'S SUMMIT LUNCHEON. |
| GRAYSON-JOCKEY CLUB RESEARCH FOUNDATION | LEXINGTON, KY | $85,000 | 2023 | SUPPORT RESEARCH TO PROMOTE EQUINE HEALTH AND WELFARE. |
| SOUTHERN CALIFORNIA EQUINE FOUNDATION | ARCADIA, CA | $50,000 | 2023 | PROMOTE MEDICAL CARE FOR HORSES |
| WINNERS FOUNDATION | ARCADIA, CA | $50,000 | 2023 | SUBSTANCE ABUSE COUNSELING |
| UC DAVIS FOUNDATION | DAVIS, CA | $50,000 | 2023 | SUPPORT RESEARCH TO PROMOTE RACEHORSE HEALTH AND SAFETY. |
| RACING MEDICATION TESTING CONSORTIUM | LEXINGTON, KS | $27,500 | 2023 | SUPPORT ANTI-DOPING RESEARCH FOR HORSE RACING. |
| CANCER SUPPORT COMMUNITY PASADENA | PASADENA, CA | $20,000 | 2023 | PROVIDING SUPPORT TO FAMILIES AND COMMUNITIES IMPACTED BY CANCER |
| EDWIN J GREGSON FOUNDATION | ARCADIA, CA | $15,750 | 2023 | SUPPORT WORKERS IN THE CALIFORNIA HORSE RACING INDUSTRY |
| CARMA | ARCADIA, CA | $10,000 | 2023 | SUPPORT REHABILITATION, TRAINING AND RETIREMENT FOR CALIFORNIA-RACED THROUGHBRED HORSES. |
| THOROUGHBRED CHARITIES OF AMERICA | LEXINGTON, KY | $5,000 | 2023 | THOROUGHBRED HORSES REHABILITATION, RETRAINING, AND REHOMING |
| RACING OFFICIALS ACCREDITATION PROGRAM | LEXINGTON, KY | $2,500 | 2023 | IMPROVING HORSE HEALTH AND WELL BEING |
| AAEP FOUNDATION DBATHE FOUNDATION FOR THE HORSE | LEXINGTON, KY | $2,500 | 2023 | IMPROVING HORSE HEALTH AND WELL BEING |
WINNERS FOUNDATION
$100,000SUBSTANCE ABUSE COUNSELING
CARMA
$60,000SUPPORT REHABILITATION, TRAINING AND RETIREMENT FOR CALIFORNIA-RACED THROUGHBRED HORSES.
SUPPORT RESEARCH TO PROMOTE EQUINE HEALTH AND WELFARE.
CALIFORNIA THOROUGHBRED HORSEMEN'S FOUNDATION
TO SUPPORT THE DEL MAR THOROUGHBRED CLUB SUMMER PROGRAM PROVIDING MEALS TO BACKSTRETCH HORSE CARE EMPLOYEES.
EDWIN J GREGSON FOUNDATION
$35,000TO SUPPORT SCHOLARSHIPS TO CHILDREN OF RACING EMPLOYEES
RACING MEDICATION TESTING CONSORTIUM
$25,000SUPPORT ANTI-DOPING RESEARCH FOR HORSE RACING.
PROVIDING SUPPORT TO FAMILIES AND COMMUNITIES IMPACTED BY CANCER
EDWIN CHARLES FOUNDATION
$1,000TO SUPPORT THE FOUNDATION
UC DAVIS FOUNDATION CO SCHOOL OF VETERINARY MEDICINE
$50,000TO SUPPORT THE FOUNDATION
SUPPORT RESEARCH TO PROMOTE EQUINE HEALTH AND WELFARE.
WINNERS FOUNDATION
$50,000SUBSTANCE ABUSE COUNSELING
PROVIDING SUPPORT TO FAMILIES AND COMMUNITIES IMPACTED BY CANCER
CALIFORNIA THOROUGHBRED HORSEMEN'S FOUNDATION
$42,500TO SUPPORT THE DEL MAR THOROUGHBRED CLUB SUMMER PROGRAM PROVIDING MEALS TO BACKSTRETCH HORSE CARE EMPLOYEES.
CARMA
$35,000SUPPORT REHABILITATION, TRAINING AND RETIREMENT FOR CALIFORNIA-RACED THROUGHBRED HORSES.
RACING MEDICATION TESTING CONSORTIUM
$27,500SUPPORT ANTI-DOPING RESEARCH FOR HORSE RACING.
THE JOCKEY CLUB SAFETY NET FOUNDATION
$5,000TO SUPPORT THE FOUNDATION
RACING OFFICIALS ACCREDITATION PROGRAM
$2,500IMPROVING HORSE HEALTH AND WELL BEING
EQUINE DISEASE COMMUNICATION CENTER
$2,500TO SUPPORT THE FOUNDATION
EDWIN J GREGSON FOUNDATION
$105,000SUPPORT WORKERS IN THE CALIFORNIA HORSE RACING INDUSTRY
PROVIDING SUPPORT TO FAMILIES AND COMMUNITIES IMPACTED BY CANCER
WINNERS FOUNDATION
$50,000SUBSTANCE ABUSE COUNSELING
SUPPORT RESEARCH TO PROMOTE EQUINE HEALTH AND WELFARE.
CARMA
$35,000SUPPORT REHABILITATION, TRAINING AND RETIREMENT FOR CALIFORNIA-RACED THROUGHBRED HORSES.
CALIF THOROUGHBRED HORSEMEN'S FOUNDATION
$25,000TO SUPPORT THE DEL MAR THOROUGHBRED CLUB SUMMER PROGRAM PROVIDING MEALS TO BACKSTRETCH HORSE CARE EMPLOYEES.
AAEP FOUNDATION DBATHE FOUNDATION FOR THE HORSE
$2,500IMPROVING HORSE HEALTH AND WELL BEING
RACING OFFICIALS ACCREDITATION PROGRAM
$2,500IMPROVING HORSE HEALTH AND WELL BEING
RACING MEDICATION TESTING CONSORTIUM
$2,500SUPPORT ANTI-DOPING RESEARCH FOR HORSE RACING.
HORSE RACING WOMEN'S SUMMIT
$2,000TO SUPPORT THE 2022 HORSE RACING WOMEN'S SUMMIT LUNCHEON.
SUPPORT RESEARCH TO PROMOTE EQUINE HEALTH AND WELFARE.
SOUTHERN CALIFORNIA EQUINE FOUNDATION
$50,000PROMOTE MEDICAL CARE FOR HORSES
WINNERS FOUNDATION
$50,000SUBSTANCE ABUSE COUNSELING
RACING MEDICATION TESTING CONSORTIUM
$27,500SUPPORT ANTI-DOPING RESEARCH FOR HORSE RACING.
CANCER SUPPORT COMMUNITY PASADENA
$20,000PROVIDING SUPPORT TO FAMILIES AND COMMUNITIES IMPACTED BY CANCER
EDWIN J GREGSON FOUNDATION
$15,750SUPPORT WORKERS IN THE CALIFORNIA HORSE RACING INDUSTRY
CARMA
$10,000SUPPORT REHABILITATION, TRAINING AND RETIREMENT FOR CALIFORNIA-RACED THROUGHBRED HORSES.
THOROUGHBRED CHARITIES OF AMERICA
$5,000THOROUGHBRED HORSES REHABILITATION, RETRAINING, AND REHOMING
RACING OFFICIALS ACCREDITATION PROGRAM
$2,500IMPROVING HORSE HEALTH AND WELL BEING
AAEP FOUNDATION DBATHE FOUNDATION FOR THE HORSE
$2,500IMPROVING HORSE HEALTH AND WELL BEING