The Duffield Family Foundation Dba Maddie's Fund
Historical FunderPleasanton, California · EIN 94-3362163 · Private foundation · Website
Grants paid (2024)$14M
Organizations funded181
Typical grant$3,000
Total assets$277.6M
Half of its grants to organizations were between $2,000 and $30,000.
From the return
How to apply
The foundation filed the following application information (Form 990-PF Part XV, tax year 2024):
| Contact | AMY ZEIFANG |
|---|---|
| Address | 6150 STONERIDGE MALL RD SUITE 125, PLEASANTON CA 94588 |
| Phone | 9253105450 |
| GRANTS@MADDIESFUND.ORG | |
| Form and materials | PLEASE SEE OUR WEBSITE AT WWW.MADDIESFUND.ORG TO REVIEW OUR GUIDELINES. |
| Deadlines | PLEASE SEE OUR WEBSITE FOR ADDITIONAL INFORMATION. |
| Restrictions | GRANTS TO ANIMAL ORGANIZATIONS AND GROUPS ONLY |
Copied as filed. Deadlines on a tax return describe the foundation's usual process; they are not confirmation of a current open cycle.
What it funds
Share of grant lines on the latest return, classified from the purpose each grant states.
Where it gives
82% of grants went outside California.
Grants paid in tax year 2024
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| Companions and Animals for Reform and Equity | Baltimore, MD | 2023 vision: human and animal well-being | $1,466,000 |
| San Francisco SPCA | San Francisco, CA | 2022 - 2025 comet program | $1,158,767 |
| UC Davis Foundation | Davis, CA | Behavioral euthanasia study | $1,137,345 |
| Cornell University | Ithaca, NY | Maddie's shelter medicine program, years 20 - 24 continuation grant | $935,000 |
| Humane Rescue Alliance | Washington, DC | Community conversations steering committee 2024-25 | $878,993 |
| University of Wisconsin-Madison | Madison, WI | Maddie's clinical instructor | $827,014 |
| Best Friends Animal Society | Kanab, UT | 2022 - 2025 shelter embed program | $750,000 |
| University of Tennessee | Knoxville, TN | Aligncare's 5-year strategic plan through 2029 | $704,983 |
| Inquiring Systems Inc | Santa Rosa, CA | Maddie's university online course development - deep dive modules | $625,000 |
| Austin Pets Alive | Austin, TX | Community conversations steering committee 2024-25 | $572,500 |
| Joybound People & Pets | Walnut Creek, CA | 2024 bring your dog to workday | $405,000 |
| Open Door Veterinary Collective | Grand Rapids, OH | 2025 - 2027 maddie's million pet challenge | $403,103 |
| University of Florida Foundation | Gainesville, FL | Maddie's million pet challenge | $335,090 |
| Aligncare Health Inc | Knoxville, TN | Community conversations - october 2024 - monthly winner | $330,000 |
| Team Shelter USA LLC | Coral Springs, FL | 2025 maddie's million pet challenge | $310,000 |
| National Animal Care & Control Association | Lindsborg, KS | 2024 - 2026 operations support | $260,000 |
| Brother Wolf Animal Rescue | Asheville, NC | 2024 hurricane relief grant | $250,000 |
| Kent Animal Shelter | Calverton, NY | Capital campaign | $250,000 |
| Friends of Oakland Animal Services | Oakland, CA | Community clinics | $203,610 |
| Project Street Vet | Encinitas, CA | Strategic planning consultant - year 2 & 3 | $150,000 |
| Jvr Shelter Strategies LLC | Belmont, CA | Community engagement case study | $141,000 |
| The Paw Mission Inc | Yucaipa, CA | 2024 - 2025 conference scholarship fund | $120,000 |
| Humane World for Animals | Washington, DC | 2025 animal care expo sponsorship | $90,460 |
| Association of Shelter Veterinarians | Apex, NC | Dental care planning grant | $80,000 |
| The Inner Pup | New Orleans, LA | 2025 community health fair for people & pets sponsorship | $79,488 |
| The Association for Animal Welfare Advancement | Surprise, AZ | 2024 fall conference scholarships | $76,000 |
| Natives in Vetmed | Fort Collins, CO | 2025 conference and clinical practice experience scholarship fund | $75,000 |
| Multicultural Veterinary Medical Association | Silverdale, WA | Open access fees | $68,108 |
| Underdog Pet Rescue | Monona, WI | Ultrasound machine | $65,000 |
| Lucky Dog Animal Rescue | Arlington, VA | 2025 scholarships for rural organizations | $62,000 |
| Asheville Humane Society | Asheville, NC | 2024 hurricane relief grant | $50,000 |
| Housing Equity & Advocacy Resource Team | Los Angeles, CA | 2024 general operating support | $50,000 |
| National Kitten College | Arlington, VA | Maddie's university online course development (series) - kitten college | $50,000 |
| Operation Kindness | Carrollton, TX | 2025 texas unites conference scholarships | $50,000 |
| Pasco County Board of County Commissioners | Land O Lakes, FL | 2024 hurricane relief grant | $50,000 |
| My Dog Is My Home | Ridgewood, NY | 2025 co-sheltering conference scholarships | $46,000 |
| Good Shepherd Humane Society | Eureka Springs, AR | 30Th anniversary hero awards | $45,000 |
| Love for Animals Inc | East Point, GA | 30Th anniversary hero awards | $32,000 |
| Veterinary Care Accessibility Project | Rochester, MI | Pet health insurance research | $31,074 |
| Atlanta Dog Mom Full Hearts | Atlanta, GA | 30Th anniversary hero awards | $30,000 |
| Berkeley Humane | Berkeley, CA | 2024 bark and meow around the block adopt-a-thon and street fair | $30,000 |
| Every Dog Behavior Training | Austin, TX | 30Th anniversary hero awards | $30,000 |
| Free Dog Trainers | Rohnert Park, CA | 30Th anniversary hero awards | $30,000 |
| Loving Paws Inc | Van Nuys, CA | 30Th anniversary hero awards | $30,000 |
| Nagi Foundation | Queen Creek, AZ | 30Th anniversary hero awards | $30,000 |
| Wisconsin Foundation and Alumni Association | Madison, WI | Feline h5n1 outbreak response | $30,000 |
| Alliance for Contraception in Cats & Dogs | Portland, OR | 2025 - 2027 operations | $25,000 |
| Furry Friends Adoption Clinic & Ranch | Jupiter, FL | 2024 hurricane relief grant | $25,000 |
| Penfed Foundation | Alexandria, VA | 2025 champions to the rescue | $25,000 |
| Awesiinyag Are Loved | Red Lake, MN | Community conversations steering committee 2024-25 | $20,000 |
| Greenville County Animal Care | Greenville, SC | 2024 hurricane relief grant | $20,000 |
| Alaqua Animal Refuge Inc | Freeport, FL | 2024 hurricane relief grant | $15,000 |
| Animal Grantmakers | Media, PA | 2024 conference and operations | $15,000 |
| Binx's Home for Black Cats Co | Asheville, NC | 2024 hurricane relief grant | $15,000 |
| California Animal Welfare Association | Penn Valley, CA | 2025 CEO forum sponsorship | $15,000 |
| Peak Grantmaking Inc | Washington, DC | 2025 community health fair for people & pets sponsorship | $15,000 |
| Runaways Animal Rescue | Port Richey, FL | 2024 hurricane relief grant | $15,000 |
| Unicoi County Animal Shelter | Erwin, TN | 2024 hurricane relief grant | $15,000 |
| Black Pet Business Network | Ocoee, FL | Maddie's university online course development - pet grooming | $10,000 |
| City of Live Oak | Live Oak, FL | 2024 hurricane relief grant | $10,000 |
Showing the 60 largest of 181 grants to organizations.
Grants approved for future payment
| Recipient | Location | Purpose | Amount |
|---|---|---|---|
| University of Wisconsin-Madison | Madison, WI | Maddie's clinical instructor | $2,103,370 |
| Humane Society of Southern Arizona | Tucson, AZ | Pima county access to care collaboration award | $692,850 |
| Humane Rescue Alliance | Washington, DC | Mlk community clinic | $646,619 |
| Friends of Pima Animal Care Center | Tucson, AZ | Pima county access to care collaboration award | $637,150 |
| Open Door Veterinary Collective | Grand Rapids, OH | 2025 - 2027 maddie's million pet challenge | $283,000 |
| The Inner Pup | New Orleans, LA | One-Touch heartworm treatment study award | $260,236 |
| Alliance for Contraception in Cats & Dogs | Portland, OR | 2025 - 2027 operations | $50,000 |
| Good Shepherd Humane Society | Eureka Springs, AR | Rural working group administrative support 2025 award | $36,200 |
Giving by year
| Tax year | Grants paid | Grant lines |
|---|---|---|
| 2024 | $14,006,035 | 189 |
| 2023 | $11,853,906 | 330 |
| 2022 | $10,048,057 | 307 |
Sources
- IRS Form 990-PF, tax year 2024, filed Mar 19, 2026 - IRS e-file batch, object ID 202600789349100615
- IRS Tax Exempt Organization Search for EIN 94-3362163
- Profile updated Nov 4, 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.