· Private foundation
Mark and Carolyn Guidry 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 it funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2024.
Where the money goes
Grants by size, and the largest recipients.
By grant size · FY2025
- Under $10k5 grants · $19k
- $10k–50k5 grants · $115k
- $50k–250k1 grant · $75k
- $250k+1 grant · $400k
| Recipient | Amount |
|---|---|
| SIERRA NEVADA CHILDREN'S MUSEUM | $400,000 |
| SAN JOSE STATE UNIVERSITY | $75,000 |
| CHICO STATE UNIVERSITY | $40,000 |
| RAFT | $30,000 |
| CAL POLY SAN LUIS OBISPO | $25,000 |
| IOWA STATE UNIVERSITY | $10,000 |
| UNIVERSITY OF WASHINGTON | $10,000 |
| CALIFORNIA STATE UNIVERSITY LONG BEACH | $6,000 |
| LAFOURCHE PARISH SCHOOLS | $5,000 |
| KING CITY HIGH SCHOOL | $3,000 |
| BITTERWATER TULLY SCHOOL | $3,000 |
| CHILDREN'S DISCOVERY MUSEUM | $2,000 |
Does the money reach high-need areas?
Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.
Dollar for dollar, its grants (FY17–25) land where the poverty rate runs at 11%, against an area that typically sits at 10%. 73% of its dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.
How this is measured
Which US states its grants reach
How this is measured
Who it funds again
Organizations funded in more than one year, against those funded once.
28 repeat relationships: 11 still active in FY2025, 17 since wound down; 1 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, 99% of grant dollars renewed an existing relationship; $6k went to new ones.
Where new relationships form · theme of each grantee’s first grant
How this is measured
Backed again, and grew
- SNSIERRA NEVADA CHILDREN'S MUSEUM DBA KIDZONE MUSEUM8× · 2017–2025 · $1.3M · 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%
How this is measured
Repeat means funded in two or more distinct years. Growth and survival are read from each grantee’s own subsequent IRS filings.
Closest unfunded matches
The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. 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.
How this is measured
9 grantees tracked through their own filings, 2017–2025.
Each grant beside the grantee’s revenue from every source, year by year.
How this is measured
Counted here: distinct organizations funded across 2017 to 2025, not grant rows in a single year, so this will not match the grant count on the cover. 9 of the 38 grantees resolved in that span have returns of their own we could reconcile.
Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.
Where the money sits, by cause and then by grantee
Each grantee by its size and the funder’s share of it; top left is load-bearing
Grantee by grantee: a decade per organization, before and after funding
A decade per grantee: revenue shaded, 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 ↗
Co-funders
Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a tightly interlocked group: 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
How this is measured
How much its grantees rely on government
Each dot is one organization Mark and Carolyn Guidry Foundation funds: left to right is the share of its income from government, bottom to top the share from Mark and Carolyn Guidry Foundation. Bigger dots raise more.
How this is measured
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.
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