· Private foundation
Carol and Warren Sinsheimer Foundation Inc
Its FY2025 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
By grantee IRS cause code (NTEE).
A cause breakdown isn’t shown here: 65% of CAROL AND WARREN SINSHEIMER FOUNDATION INC’s grantee dollars fall outside its nine largest cause areas, whether because the recipient carries no IRS cause code or because its cause sits in the long tail. A chart would be mostly one residual band and misrepresent the portfolio.
Where the money goes
Your grants by size, and where they go.
| Recipient | Amount |
|---|---|
| SLO NOOR FOUNDATION | $2,500 |
| TRANSITIONS MENTAL HEALTH ASSOC | $1,000 |
| SLO REPERTORY THEATRE | $1,000 |
| Individual grant recipient | $1,000 |
| SLO INTERNATIONAL FILM FESTIVAL | $1,000 |
| COMMUNITY COUNSELING CENTER | $500 |
| LUMINA ALLIANCE | $500 |
| Individual grant recipient | $500 |
| HOSPICE OF SLO COUNTY | $500 |
| PLANNED PARENTHOOD | $500 |
| MONO LAKE COMMITTEE | $500 |
| FRIENDS OF ALTA | $500 |
| ENVIRONMENTAL DEFENSE FUND | $200 |
| ECOSLO | $200 |
| MONDAY CLUB CONSERVANCY | $200 |
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.
Your human-services grants (FY19–25, $9k) land where the poverty rate runs at 12%, against an area that typically sits at 9%. 100% of those 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.
Which US states your grants reach
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.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +39% since the first grant, against +3% for the ones you funded once.
25 repeat relationships — 19 still active in FY2025, 6 since wound down; 4 grantees were first funded in FY2025 (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 FY2025, 88% of grant dollars renewed an existing relationship; $1k 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
- KIKCBX INC4× · 2017–2022 · $15k · revenue +81%
SLO NOOR FOUNDATION A NON-PROFIT CORPORATION5× · 2021–2025 · $13k · revenue +44%- HOHOSPICE OF SAN LUIS OBISPO COUNTY5× · 2019–2025 · $8k · revenue +46%
Funded once
- IGIndividual grant recipientone grant, 2024 · $3k
- FBFOOD BANK COALITION OF SAN LUIS OBISPO COUNTYone grant, 2021 · $3k · revenue +3%
- FFFOUNDATION FOR THE PERFORMING ARTSone grant, 2021 · $3k
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.
Cuenca los ojos works to preserve and restore the biodiversity of the us/mexican borderlands through land protection, habitat restoration and wildlife reintroduction.
Conserve the beauty, character, and diversity of significant lands in far northern california. currently shasta land trust holds conservation easements that permanently protect about 66,000 acres of land.
Los padres forestwatch protects the los padres national forest and the carrizo plain national monument through education, advocacy, and when necessary, legal action for the benefit of our communities, climate and future generations.
To protect and steward in perpetuity the unique natural, cultural, and asthetic resources of the preserve and serve as a model of ecologically sustainable development to committees outside the preserve.
The principal mission of the land trust is to work with landowners to protect agricultural and forest lands, water resources, wildlife habitat and scenic open spaces, and to serve our community by facilitating parks and trail in custer,…
The trust for public land creates parks and protects land for people, ensuring healthy, livable communities for generations to come. in the past year, we helped communities to plan for parks and conservation, fund parks and conservation,…
To conserve natural resources, agricultural land and open spaces for present and future generations.
Land trust of santa cruz county (the organization) was incorporated in california as a not-for-profit corporation in 1978. the mission of the organization is to protect, care for, and connect all people to the vibrant natural and working…
To protect and nurture point lobos state natural reserve, to educate and inspire visitors to preserve its unique natural and cultural resources, and to strengthen the network of Carmel area state parks.
To conserve and enhance land in southern oregon to sustain our human and natural communities forever.
San luis obispo legal assistance foundation's mission is to provide legal services and resources to people in need.
The purpose of the organization is to monitor, manage, and preserve conservation easements it stewards in northern california. the organization acquires conservation easements in land exhibiting important natural features to protect and…
For reference, the grantee most central to the portfolio’s shape is The Land Conservancy of San Luis Obispo County and the most unlike its peers is Community Counseling Center Inc. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
17 grantees tracked through their own filings, 2017–2026.
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 2017–2026, not grant rows in a single year — so this will not match the grant count on the cover. 17 of the 44 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 KCBX INC ↗
- Who funds SLO NOOR FOUNDATION A NON-PROFIT CORPORATION ↗
- Who funds HOSPICE OF SAN LUIS OBISPO COUNTY ↗
- Who funds COMMUNITY COUNSELING CENTER INC ↗
- Who funds TRANSITIONSMENTAL HEALTH ASSOCIATION ↗
- Who funds FOOD BANK COALITION OF SAN LUIS OBISPO COUNTY ↗
- Who funds THE MONO LAKE FOUNDATION ↗
- Who funds LUMINA ALLIANCE ↗
- Who funds THE LAND CONSERVANCY OF SAN LUIS OBISPO COUNTY ↗
- Who funds FRIENDS OF 40PRADO ↗
- Who funds SOUTHERN POVERTY LAW CENTER INC ↗
- Who funds CALIFORNIA RANGELAND TRUST ↗
- Who funds FRIENDS OF ALTA INC ↗
- Who funds NATIONAL WILDLIFE FEDERATION ↗
- Who funds ENVIRONMENTAL DEFENSE FUND INCORPORATED ↗
- Who funds NATIONAL PARKS CONSERVATION ASSOCIATION ↗
- Who funds SECOND HARVEST FOOD BANK GREATER NEW ORLEANS AND ACADIANA ↗
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: The Community Foundation San Luis Obispo · Hughes Charitable Foundation · Santa Barbara Foundation · Must · The Shanbrom Family Foundation · Sempra Foundation · Ge Aerospace Foundation · The Blackbaud Giving Fund · Renaissance Charitable Foundation Inc · The Bank of America Charitable Foundation Inc · Vanguard Charitable Endowment Program · Donor Advised Charitable Giving Inc
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 Carol and Warren Sinsheimer Foundation Inc 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 Carol and Warren Sinsheimer Foundation Inc?
Find your warmest path to Carol and Warren Sinsheimer Foundation Inc 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.