· Private foundation
Mark and Carolyn Guidry 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 FY2017–2024.
Where the money goes
Your grants by size, and where they go.
By grant size · FY2024
- Under $10k5 grants · $18k
- $10k–50k3 grants · $45k
- $50k–250k1 grant · $75k
- $250k+1 grant · $400k
| Recipient | Amount |
|---|---|
| SIERRA NEVADA CHILDREN'S MUSEUM | $400,000 |
| SAN JOSE STATE UNIVERSITY | $75,000 |
| CAL POLY SAN LUIS OBISPO | $25,000 |
| UNIVERSITY OF WASHINGTON | $10,000 |
| IOWA STATE UNIVERSITY | $10,000 |
| LAFOURCHE PARISH SCHOOLS | $5,000 |
| RAFT | $5,000 |
| BITTERWATER TULLY SCHOOL | $3,000 |
| KING CITY HIGH SCHOOL | $3,000 |
| CHILDREN'S DISCOVERY MUSEUM | $2,000 |
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 (FY17–24) land where the poverty rate runs at 11%, against an area that typically sits at 10%. 68% 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.
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.
28 repeat relationships — 10 still active in FY2024, 18 since wound down.
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, 100% of grant dollars renewed an existing relationship; $0 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
- SNSIERRA NEVADA CHILDREN'S MUSEUM DBA KIDZONE MUSEUM7× · 2017–2024 · $859k · revenue +300%
- CPCAL POLY CORPORATION4× · 2018–2021 · $46k · revenue +74%
- SHSARATOGA HIGH SCHOOL FOUNDATION2× · 2017–2018 · $3k · revenue +43%
Funded once
- AFARCACIA FRATERNITY FOUNDATIONone grant, 2019 · $53k
- PPPORTLAND PUBLIC SCHOOLSone grant, 2021 · $9k
- RARESOURCE AREA FOR TEACHINGgraduatedone grant, 2017 · $5k · revenue +94%
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.
Santa Barbara Education Foundation (SBEF) provides and supports programs that enrich the academic, artistic, and personal development of all students in the Santa Barbara Unified School District.
The uc santa barbara foundation actively works to further the goals of the university of california, santa barbara. the foundation seeks to maintain and nurture the university's quality and distinction. on behalf of the campus, the…
The mission of the uc davis foundation is to secure, steward and manage private gifts for uc davis.
Established in 1962, the foundation is the central foundation for the california state university (csu) system and serves the office of the chancellor. the foundation exists to support excellence in teaching and learning, and to serve the…
To accept and manage restricted and unrestricted gifts benefiting california state university east bay. additionally, the trustees support the university through advocacy, development, personal contributions and counsel to the university's…
Raise private resources to advance the mission and priorities of the university and serve as ambassadors in the community. provide stewardship in the prudent investment of resources and ensure the integrity of the foundation through…
To benefit the university of california santa cruz.
As an integral member of the san jose state university community, the san jose state university research foundation provides an entrepreneurial framework through which local, state and federal agencies, businesses and private foundations…
The mission of the silicon schools fund is to improve education through supporting the launch of excellent new schools, improving academic instruction in existing schools, and by funding some of the boldest innovations in education…
Csu east bay foundation is an auxiliary organization of california state university east bay and the california state university system. the organization's mission is to provide services that aid, supplement, and advance the educational…
To further the scientific, literary, educational and charitable purposes of california state university, monterey bay, including fundraising, development, endowment management, financial assistance, public relations and other support.
To support and further the research, education and community service objectives of san diego state university.
For reference, the grantee most central to the portfolio’s shape is Saratoga High School Foundation and the most unlike its peers is Sierra Nevada Children's Museum Dba Kidzone Museum. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
9 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. 9 of the 37 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 SIERRA NEVADA CHILDREN'S MUSEUM DBA KIDZONE MUSEUM ↗
- Who funds Acacia Fraternity Foundation Inc ↗
- Who funds CAL POLY CORPORATION ↗
- Who funds LAS VEGAS NATURAL HISTORY MUSEUM ↗
- Who funds UCLA FOUNDATION ↗
- Who funds RESOURCE AREA FOR TEACHING ↗
- Who funds SARATOGA HIGH SCHOOL FOUNDATION ↗
- Who funds SARATOGA MUSIC BOOSTERS ↗
- Who funds SARATOGA EDUCATION 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: Bright Funds Foundation · The Blackbaud Giving Fund · Charities Aid Foundation America · The Bank of America Charitable Foundation Inc · American Online Giving Foundation Inc · Donor Advised Charitable Giving 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 Mark and Carolyn Guidry 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 Mark and Carolyn Guidry Foundation?
Find your warmest path to Mark and Carolyn Guidry 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.