· Private foundation
Si Robin Foundation
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
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2017–2025.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2025
- $10k–50k13 grants · $334k
- $50k–250k13 grants · $1.2M
- $250k+2 grants · $944k
| Recipient | Amount |
|---|---|
| PEARL HARBOR AVIATION MUSEUM | $688,488 |
| PALM SPRINGS AIR MUSEUM INC | $255,600 |
| PEARL HARBOR AVIATION MUSEUM | $164,240 |
| San Diego Air and Space Museum | $150,000 |
| UND AEROSPACE FOUNDATION | $142,000 |
| PEARL HARBOR AVIATION MUSEUM | $117,382 |
| BOB HOOVER ACADEMY | $100,000 |
| ST JUDE CHILDREN'S RESEARCH HOSPITA | $92,591 |
| ANGEL FLIGHT WEST | $85,835 |
| Museum of Flight Foundation | $74,010 |
| AERO CLUB OF SOUTHERN CA | $73,500 |
| RENO AIR RACING ASSOCIATION INC | $60,000 |
| PEARL HARBOR AVIATION MUSEUM | $53,436 |
| CONDOR SQUADRON OFFICERS AIRMENS | $53,390 |
| WINGS OVER THE ROCKIES | $50,000 |
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 (FY17–25) land where the poverty rate runs at 11%, against an area that typically sits at 10%. 54% of your dollars go to grantees based in above-average-need neighborhoods. Your grants spread fairly evenly across need levels.
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.
27 repeat relationships — 19 still active in FY2025, 8 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, 94% of grant dollars renewed an existing relationship; $144k 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
- PHPEARL HARBOR AVIATION MUSEUM9× · 2017–2025 · $4.0M · revenue +21%
- UAUND Aerospace Foundation8× · 2017–2025 · $1.7M · revenue +18%
- SDSAN DIEGO AIR & SPACE MUSEUM INC9× · 2017–2025 · $790k · revenue +26%
Funded once
- CSCOLORADO SKIES ACADEMYgraduatedone grant, 2024 · $100k · revenue +43%
- NVNORTH VALLEY OCCUPATIONAL CENTERone grant, 2023 · $40k
- IGIndividual grant recipientone grant, 2024 · $20k
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.
The mission of the sac museum is to celebrate our heritage, preserve our artifacts, and inspire learning.
The Chico Air Museum was founded to collect, preserve, document and display artifacts significant to the rich aviation and aerospace history of the Chico Army Air Field and the North Valley.
The new england air museum's mission is to preserve and present the story of aviation and aerospace, with an emphasis on new england's role, and the genius and inspiration that made it possible. the museum also seeks to inspire young…
Collect and preserve historical data, artifacts, and scientific objects with regard to the country's fighter aces, its military aviation and aviators' history. educate the public about the experience in military combat and offer…
Lone Star Flight Museum (LSFM) celebrates flight and achievements in Texas aviation, engages youth through STEM (science, technology, engineering, and math), and believes aviation inspires achievement and endless possibilities.
To serve as preservationist of past, present, and future aerospace and aeronautical artifacts, historical documents, and memorabilia of the santa maria valley and this nation.
For reference, the grantee most central to the portfolio’s shape is Museum of Flight Foundation and the most unlike its peers is Condor Squadron Officers & Airmens. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
For each theme you fund, this compares how the sector’s money is shifting with how your own giving is shifting.
Sector change and giving change are each shown relative to their own range, growing (right) or shrinking (left); both normalized, so inflation isn’t mistaken for growth.
Your grantees are a median of 40 years old; the field is 16. You back the established end — and your money leans older still.
The field is 22% startups (under 5 years old) — 0% of your grantees by number, and just 0% of your money.
The orgs you fund almost never close — 0.0% lost their exemption, against 13% of the field you don’t fund.
Age = years since IRS exemption (a founding proxy). “Closed” = auto-revocation for 3 years of non-filing — a floor on closure, not proof, and bigger established orgs lapse least. Association, not causation.
27 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. 27 of the 35 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 PEARL HARBOR AVIATION MUSEUM ↗
- Who funds UND Aerospace Foundation ↗
- Who funds SAN DIEGO AIR & SPACE MUSEUM INC ↗
- Who funds MUSEUM OF FLIGHT FOUNDATION ↗
- Who funds ST JUDE CHILDREN'S RESEARCH HOSPITAL INC ↗
- Who funds CEDARS-SINAI MEDICAL CENTER ↗
- Who funds Children's Hospital Los Angeles ↗
- Who funds Planes of Fame Air Museum ↗
- Who funds PALM SPRINGS AIR MUSEUM INC ↗
- Who funds SMITHSONIAN INSTITUTION ↗
- Who funds THE COMMEMORATIVE AIR FORCE ↗
- Who funds MUSEUM OF FLYING ↗
- Who funds ANGEL FLIGHT WEST INC ↗
- Who funds Reno Air Racing Association Inc ↗
- Who funds WINGS OVER THE ROCKIES AIR & SPACE MUSEUM ↗
- Who funds CONDOR SQUADRON OFFICERS & AIRMENS ↗
- Who funds Aerospace Museum of California ↗
- Who funds EAA AVIATION FOUNDATION INC ↗
- Who funds BOB HOOVER ACADEMY ↗
- Who funds COLORADO SKIES ACADEMY ↗
- Who funds EMBRY-RIDDLE AERONAUTICAL UNIVERSITY INC ↗
- Who funds VINTAGE AUTO RACING ASSOCIATION ↗
- Who funds CAMARILLO WINGS ASSOCIATION ↗
- Who funds AERO CLUB OF SOUTHERN CALIFORNIA ↗
- Who funds THE AOPA FOUNDATION INC ↗
- Who funds AVIATION EXPLORERS INC ↗
- Who funds GARY SINISE FOUNDATION ↗
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: Clay Lacy Foundation · Ray Foundation Inc · Apex Foundation · Enterprise Holdings Foundation · Vanguard Charitable Endowment Program · American Endowment Foundation · National Philanthropic Trust · Donor Advised Charitable Giving Inc · American Online Giving Foundation Inc · Fidelity Investments Charitable Gift Fund · Amazonsmile 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 Si Robin 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.
- Embry-Riddle Aeronautical University Inc — 3% of income from government
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 Si Robin Foundation?
Find your warmest path to Si Robin 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.