Foundations · IRS 990 filings

Foundations in San Mateo, California

52
foundations with a San Mateo address
$132.9M
grants paid, FY2023–FY2025
11
say they accept unsolicited
$8,200
median grant

Grantlas lists 52 foundations that gave a San Mateo, California address on their tax filing — 51 private foundations and 1 grantmaking charity — from filings for FY2023–FY2025. Together they paid out $132.9 million in grants in their latest filing year, and 11 of them (21%) say they accept unsolicited requests.

Not every foundation here is a San Mateo foundation. The city is the mailing address on the foundation’s tax filing, and when a bank or a law firm runs the trust that is the bank’s address, not the place it gives to. Check where a foundation gives before you write.

Top 25 of 52 foundations

Ranked by what they paid in grants in their latest filing, with the ones that accept unsolicited requests first, then the ones whose filing doesn’t say.

Foundations in San Mateo, California
With FoundationAccepts$128,000$8.3M$2,000–$760,000No grants on file for the year three years back, so there is nothing to compareFY2024Locked: fit score and contacts
The Draper FoundationAccepts$10,000$6.8M$200–$1MNo grants on file for the year three years back, so there is nothing to compareFY2024Locked: fit score and contacts
Franklin Templeton Charitable Foundation IncAccepts$24,877$1.6M$150–$526,611No grants on file for the year three years back, so there is nothing to compareFY2024Locked: fit score and contacts
Rupert H Johnson Jr FoundationAccepts$50,000$1.6M$5,000–$200,000No grants on file for the year three years back, so there is nothing to compareFY2025Locked: fit score and contacts
Jh Robbins FoundationAccepts$5,000$155,500$1,000–$10,000No grants on file for the year three years back, so there is nothing to compareFY2024Locked: fit score and contacts
LI & Liu Family FoundationAccepts$2,100$149,669$828–$140,000No grants on file for the year three years back, so there is nothing to compareFY2024Locked: fit score and contacts
China Times Cultural FoundationAccepts$3,000$79,000$3,000–$5,000No grants on file for the year three years back, so there is nothing to compareFY2025Locked: fit score and contacts
Clement Chen Family FoundationAccepts$7,000$63,000$1,000–$50,000No grants on file for the year three years back, so there is nothing to compareFY2025Locked: fit score and contacts
G W Williams FoundationAccepts$1,000$51,000$1,000–$30,000No grants on file for the year three years back, so there is nothing to compareFY2024Locked: fit score and contacts
Yun Family FoundationAccepts$6,008$6,008—No grants on file for the year three years back, so there is nothing to compareFY2025Locked: fit score and contacts
Palo Alto InstituteAccepts$5,448$5,448—No grants on file for the year three years back, so there is nothing to compareFY2025Locked: fit score and contacts
Hillsdale High School FoundationPublic foundationNot stated$38,000Over $5k only$399,433$5,000–$301,028No grants on file for the year three years back, so there is nothing to compareFY2024Locked: fit score and contacts
The Roberts FoundationInvitation only$49.8M$49.8M—No grants on file for the year three years back, so there is nothing to compareFY2024Locked: fit score and contacts
The Helen Diller FoundationInvitation only$5M$44.8M$19,050–$25MNo grants on file for the year three years back, so there is nothing to compareFY2024Locked: fit score and contacts
The Baszucki Family FoundationInvitation only$59,885$11.3M$10,000–$2.6MUp 192% over 3 yearsFY2024Locked: fit score and contacts
Blume FoundationInvitation only$35,000$1.1M$2,000–$400,000No grants on file for the year three years back, so there is nothing to compareFY2023Locked: fit score and contacts
The Middleton FoundationInvitation only$1,000$783,500$100–$500,000No grants on file for the year three years back, so there is nothing to compareFY2024Locked: fit score and contacts
The O'Brien Family FoundationInvitation only$5,000$779,550$250–$125,000No grants on file for the year three years back, so there is nothing to compareFY2025Locked: fit score and contacts
The Eric and Lulu Roberts FamilyInvitation only$33,978$736,503$1,000–$444,016No grants on file for the year three years back, so there is nothing to compareFY2025Locked: fit score and contacts
The Courtney Roberts and Steve PrestonInvitation only$35,000$733,500$2,500–$250,000No grants on file for the year three years back, so there is nothing to compareFY2025Locked: fit score and contacts
Greene Van Arsdale FoundationInvitation only$20,000$494,161$5,000–$1MNo grants on file for the year three years back, so there is nothing to compareFY2025Locked: fit score and contacts
Minority Television Project IncInvitation only$18,821$377,824$999–$81,751No grants on file for the year three years back, so there is nothing to compareFY2024Locked: fit score and contacts
The Shao-LI Charitable TrustInvitation only$475,000$350,000$350,000–$600,000No grants on file for the year three years back, so there is nothing to compareFY2025Locked: fit score and contacts
Erik S Cassel FoundationInvitation only$55,000$340,000$35,000–$100,000No grants on file for the year three years back, so there is nothing to compareFY2024Locked: fit score and contacts
The Mark and Kwala Roberts FamilyInvitation only$15,000$250,789$10,000–$167,432No grants on file for the year three years back, so there is nothing to compareFY2025Locked: fit score and contacts
  • Median grant and grant range come from each funder’s grant schedule; a dash means there is none to report. Community foundations and other charities list only grants over $5,000, so their figures run high.
  • “One grant” means a schedule with a single grant — no median, nothing to range over. “One amount” means several grants, all the same size.
  • A median grant larger than the grants paid is not a mistake: the grant schedule and the year’s total come from different parts of the tax filing, and a foundation can list a grant it approved in a year it paid out less.
  • 3-yr trend compares the latest filing year with the year two before it, so it needs grants on file for both. Most foundations file one year of grants, so most rows show a dash.

27 more foundations — see all in Grantlas

Data from 990-PF and Form 990 filings, FY2023–FY2025. Updated November 8, 2026.