· Private foundation
The Michael and Sally Mayer Family Foundation
Its FY2024 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2020–2024.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- Under $10k12 grants · $58k
- $10k–50k1 grant · $15k
| Recipient | Amount |
|---|---|
| SAN MATEO SERVICE LEAGUE HOPE HOUSE | $15,000 |
| Individual grant recipient | $9,800 |
| FAMILY CONNECTIONS | $7,500 |
| NAMI | $7,500 |
| HEART FOR HUMANITY | $6,000 |
| LYMELIGHT | $5,000 |
| FUND FOR PORTLAND PUBLIC SCHOOLS | $5,000 |
| UC SAN DIEGO | $5,000 |
| Individual grant recipient | $5,000 |
| ARCHBISHOP RIORDAN HIGH SCHOOL | $4,500 |
| FIRST PRESBYTERIAN CHURCH OF BURLINGAME | $1,325 |
| BOK RANCH | $1,000 |
| Individual grant recipient | $85 |
Do your dollars go where the need is?
Each grant placed by the hardship in its grantee’s ZIP, then read against the area’s typical level.
Dollar for dollar, your grants (FY20–24) land where the poverty rate runs at 8%, against an area that typically sits at 7%. 100% of your dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty linein the grantee’s ZIP, averaged from the tracts in that ZIP; grantee ZIP can differ from where services are delivered.
US grants placed by each grantee’s ZIP, which can differ from where services are actually delivered. Need from public data — U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA — shown as context about the area, never attributed to your giving.
Who you back again
Which organizations you funded more than once, and which you funded a single time. Each grantee is matched to its own filings.
17 repeat relationships — 8 still active in FY2024, 9 since wound down; 5 grantees were first funded in FY2024 (too recent to call).
How the two cohorts compare
Organizations
Total granted
Median revenue growth · since first grant
Still filing today
New vs renewed · share of each year
In FY2024, 50% of grant dollars renewed an existing relationship; $36k went to new ones.
Where new relationships form · theme of each grantee’s first grant
First-time = a grantee’s first year in your filing window; renewed = funded in an earlier year too. As a portfolio matures the renewed share naturally climbs — once funded, an org stays “renewable” — so the signal is the years that buck it (a new-grantee intake wave). The earliest year is left-censored: relationships that predate the data read as “new.” Theme is the grantee’s IRS cause.
Backed again, and grew
- PFPENINSULA FAMILY CONNECTIONS4× · 2020–2024 · $39k · revenue +30%
CORA Community Overcoming Relationship Abuse3× · 2020–2022 · $8k · revenue +46%- CRCONSUMER REPORTS INC3× · 2020–2022 · $816 · revenue +7%
Funded once
- JAJazz at the Ballroom Incone grant, 2022 · $10k · revenue -51%
- SMSAN MATEO COUNTY PARKSone grant, 2021 · $9k
- LFLL FOUNDATIONone grant, 2023 · $6k
Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.
The map has a center of gravity: the average direction from the rest of the sector toward the organizations the foundation funds — the shape of its giving. Scoring every nonprofit along that direction surfaces the ones that look most like the portfolio. These are the closest matchesthat aren’t grantees — a resemblance in what they say they do, not a recommendation.
MISSION STATEMENT: MISSION: CARING FOR OUR PATIENTS FIRST AND OUR PEOPLE ALWAYS. VISION: TO BE THE MOST COMPREHENSIVE, INTEGRATED AND CONNECTED HEALTH SYSTEM FOR GETTING AND STAYING WELL. VALUES: EXCELLENCE - We deliver high-quality,…
PPS-SF's mission is to promote the fundamental value of public education and pursue the success of every public school by sharing knowledge, bridging communities, and informing policy.
The resource renewal institute facilitates the creation, development and implementation of practical strategies to solve the entire complex environmental problem by addressing it comprehensively.
Mission: We are building a grassroots climate movement in the Bay Area and beyond to eliminate carbon pollution and achieve a clean energy future with racial, economic, and environmental justice. Our vision is that all who live in the Bay…
Our mission is to spark wonder and intellectual curiosity in each child. We achieve this through a purposeful blend of:Engaging academics custom-tailored to each child's abilities, strengths and interests;An unparalleled social-emotional…
Mission statement: mission: caring for our patients first and our people always. vision: to be the most comprehensive, integrated and connected health system for getting and staying well. values: excellence - we deliver high-quality,…
Inform and improve public policy in california through independent, objective, nonpartisan research
For reference, the grantee most central to the portfolio’s shape is Peninsula Family Connections and the most unlike its peers is Hillsdale College. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
14 grantees tracked through their own filings, 2017–2025.
Each one resolved to its own IRS returns and tracked year by year — your grant beside their revenue from every source. Association, dated; never a causal claim.
Counted here: distinct organizations you funded across 2017–2025, not grant rows in a single year — so this will not match the grant count on the cover. 14 of the 46 grantees resolved in that span have returns of their own we could reconcile; the rest are funded organizations whose filings we could not track year by year.
Where your money sits — by cause, then by grantee
Each org by its size and your share of it — top-left is where you’re load-bearing
Go grantee by grantee — a decade per org, and how each moved after you funded them
A decade per grantee — revenue shaded, your grants as bars, all rows on one timeline.
- Who funds PENINSULA FAMILY CONNECTIONS ↗
- Who funds Jazz at the Ballroom Inc ↗
- Who funds CORA Community Overcoming Relationship Abuse ↗
- Who funds FUND FOR PORTLAND PUBLIC SCHOOLS ↗
- Who funds FOOD RUNNERS ↗
- Who funds BOK RANCH INC ↗
- Who funds PENINSULA OPEN SPACE TRUST ↗
- Who funds Pets In Need ↗
- Who funds CARITAS CREEK ↗
- Who funds CONSUMER REPORTS INC ↗
- Who funds Human Investment Project Inc ↗
- Who funds HILLSDALE COLLEGE ↗
The grantmakers whose grantees overlap with yours far more than size alone predicts. Each orbits closer the stronger the alignment; the arcs between them show where they also fund each other. Here it reads as a tightly interlocked camp — most of these funders back each other's grantees too.
Open a dossier: Silicon Valley Community Foundation · Jewish Community Federation of San Francisco the Peninsula Marin & Sonoma · The Palo Alto Community Fund · Atkinson Foundation · The David and Lucile Packard Foundation · The San Francisco Foundation · National Philanthropic Trust · The Blackbaud Giving Fund · American Endowment Foundation · Morgan Stanley Global Impact Funding Trust Inc · American Online Giving Foundation Inc · Jpmorgan Chase Foundation
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. A research starting point: overlap is association, not proof of shared intent.
Government reliance of your grantees
Every dot is one organization The Michael and Sally Mayer Family Foundation funds. Left–right is the share of its income from government; up–down is the share from you. Bigger dots raise more. Filter to federal or a single department — and drag the year to watch it move.
Government income is each org’s traced federal awards (USASpending — grants and contracts) plus state payments (open checkbooks) as a share of its total revenue (IRS Form 990); the self-reported government-grant line (990 line 1e) is carried for cross-check: a grantee that reports government grants we could not trace to a source is left off the chart rather than shown as receiving none. An association, not a claim that your grant caused the public funding. Coverage is precision-first — a floor, not a census; state records exist for 9 states, so a grantee outside them shows no state figure (dimmed) rather than a false zero. Federal award amounts are obligations, which can span years, so a single-year share is indicative. 990 filings lag 12–24 months.
Warm introductions · Powered by PlinthPlus
How do I get to The Michael and Sally Mayer Family Foundation?
Find your warmest path to The Michael and Sally Mayer Family Foundation through trustees and officers whose names appear on both boards. Search for your organization and Plinth traces the shortest route it can evidence.
Each link is a name appearing on two organizations’ public IRS 990 filings, matched on that name and, where the filings support it, on location. A same-state match has geographic support, which is a second matching feature rather than confirmation that the two are one person; a cross-state one is the likeliest to be two people who share a name. Every hop shows its tier, low-confidence and distant paths are held back rather than guessed, and it is worth confirming the person before you use the introduction.