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Trini and OC Mendenhall Foundation at a glance

· Private foundation

Trini and OC Mendenhall 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.

$15k
Granted FY2024still arriving
3
Grants FY2024still arriving
1
States reached
$10k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0197% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2024.

Education$837kHuman Services$401kReligion$353kHealth$254kCrime & Legal$122kYouth Development$59kHousing & Shelter$30kArts & Culture$25kOther$0
02FY2024 · 3 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2024

  • Under $10k2 grants · $5k
  • $10k–50k1 grant · $10k
$3,000
Median grant
1
States reached
$2k
Total assets
Largest grants
RecipientAmount
Christian Community Service - CCSC$10,000
Archdiocese of Galveston - Houston$3,000
Latin Women's Initiative - Giving Heart$2,125
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Its human-services grants (FY17–23, $164k) land where the poverty rate runs at 16%, against an area that typically sits at 12%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 12%Covenant House Texas: $25k → 16%Catholic Charities of the Archdiocese of Galveston: $25k → 16%Covenant House Texas: $20k → 16%Covenant House Texas: $15k → 16%The Women's Home: $10k → 16%The Women's Home: $10k → 16%Raise Up Families: $13k → 16%Raise Up Families: $10k → 16%Raise Up Families: $10k → 16%Aid to Victims of Domestic Abuse: $4k → 16%Aid to Victims of Domestic Abuse: $2k → 16%RaiseUp Families: $10k → 16%Westside Homeless Partnership: $10k → 16%Latin Women's Initiative: $1k → 16%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

94%of every dollar goes to organizations it has funded before.
$2.0M · 29 repeat orgs$125k to everyone else

29 repeat relationships: 3 still active in FY2024, 26 since wound down.

How the two cohorts compare

Re-uppedFunded once

Organizations

29
21

Total granted

$2.0M
$125k

Median revenue growth · since first grant

+38%
+88%

Still filing today

52%
62%

New vs renewed · share of each year

In FY2024, 100% of grant dollars renewed an existing relationship; $0 went to new ones.

50%100%’17’18’19’20’21’22’23’24
RenewedFirst-time

Where new relationships form · theme of each grantee’s first grant

’17’18’19’20’21’22’23’24
Human ServicesEducationHealthCrime & LegalArts & CultureYouth DevelopmentOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). 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

  • LC
    LEGACY COMMUNITY HEALTH SERVICES INC
    4× · 2019–2022 · $200k · revenue +140%
  • CA
    CHILD ADVOCATES INC
    6× · 2017–2022 · $82k · revenue +12%
  • CH
    COVENANT HOUSE TEXAS
    3× · 2019–2021 · $60k · revenue +3%

Funded once

  • HC
    Harris County Hospital District Foundation
    one grant, 2022 · $25k · revenue -80%
  • CC
    CATHOLIC CHARITIES OF THE ARCHDIOCESE OF GALVESTON - HOUSTONgraduated
    one grant, 2018 · $25k · revenue +51%
  • HC
    HOUSTON'S CHARITY FOR CHILDREN INCgraduated
    one grant, 2018 · $11k · revenue +88%
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.

04Its field

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.

1
Trees for Houston

Plant, protect and promote trees all over the greater Houston area.

—
2
John P McGovern Museum of Health & Medical Science

The Health Museum is an innovative science center that provides an interactive and entertaining experience for all ages, promotes understanding and appreciation of the human body, mind, and spirit, and inspires a lifelong commitment to…

Arts & Culture
3
Christus Foundation for HealthCare

CHRISTUS Foundation for HealthCare is dedicated to extending the healing ministry of Jesus Christ, continuing the legacy of the Congregation of the Sisters of Charity of the Incarnate Word through the promotion of health and welfare to…

Health
4
Breakthrough Houston

The mission of Breakthrough Houston (BTH) is to work with highly motivated students to achieve post-secondary success and empower aspiring leaders to become the next generation of educational advocates.

Education
5
Houston Museum of Natural Science

The mission of the Houston Museum of Natural Science shall be to preserve and advance the general knowledge of natural science; to enhance in individuals the knowledge of and delight in natural science and related subjects; and to maintain…

Arts & Culture
6
Family Service Center of Houston and Harris County

The mission of Family Service Center of Houston and Harris County (Family Houston) is to create a stronger community for tomorrow by helping individuals and families meet the challenges they face today. We help others help themselves.

Human Services
7
Houston Area Women's Center

The Houston Area Women's Center (HAWC) works to end domestic and sexual violence and supports all in building safe and healthy lives through advocacy, counseling, education, shelter, and support services.

Human Services
8
Houston Botanic Garden

To enrich life through discovery, education, and the conservation of plants and the natural environment.

Environment
9
The Methodist Hospital Foundation

Mission: this organization is part of the methodist hospital, doing business as houston methodist hospital, whose mission is: to provide high quality, cost-effective health care that delivers the best value to the people we serve in a…

Health
10
Houston Area Community Services

Our mission is to provide high quality and caring services to promote healthy people and communities.

Health
11
Memorial Hermann Medical Group

Memorial hermann health system is a nonprofit, values-driven, community-owned health system dedicated to improving health. our vision is to create healthier communities, now and for generations to come. our values are community,…

Health
12
The Methodist Hospital

To provide high quality, cost-effective health care that delivers the best value to the people we serve in a spiritual environment of caring in association with internationally recognized teaching and research.

Health
How this is measured
The grantee most central to the portfolio’s shape is El Centro De Corazon; the most unlike its peers is The Museum of Fine Arts Houston. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
04the grantee network

28 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. 28 of the 50 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.

0
Load-bearing (≥25% of a budget)
10
Early backer (in before they grew)
28/28
Grantees still filing
22/28
Grew since first funded

Where the money sits, by cause and then by grantee

ST THOMAS HIGH SCHOOL: $675,000 · OtherST THOMAS HIGH SCHOOLArchdiocese of Galveston-Houston: $290,000 · OtherArchdiocese of Galveston-HoustonRonald McDonald House: $152,000 · OtherRonald McDonald HouseChristian Community Service - CCSC: $53,500 · OtherINCARNATE WORD ACADEMY: $50,000 · Other+24 more: $276,475 · Other+24 moreLEGACY COMMUNITY HEALTH SERVICES INC: $200,000 · HealthLEGACY COMMUN…Harris County Hospital District Foundation: $25,000 · HealthHarris County…American Heart Association Inc: $24,100 · HealthAmerican Hear…+1 more: $250 · HealthCOVENANT HOUSE TEXAS: $60,000 · Human ServicesRAISEUP FAMILIES: $52,050 · Human ServicesCATHOLIC CHARITIES OF THE ARCHDIOCESE OF GALVESTON - HOUSTON: $24,760 · Human ServicesTHE WOMEN'S HOME: $20,000 · Human ServicesAVDA: $5,750 · Human Services+2 more: $3,325 · Human ServicesSmall Steps Nurturing Center: $59,400 · EducationUniversity of St Thomas: $13,100 · EducationUniversity of Houston Foundation: $10,000 · EducationSan Francisco Nativity Academy: $3,750 · Education+1 more: $1,000 · EducationCHILD ADVOCATES INC: $81,800 · Crime & LegalEL CENTRO DE CORAZON: $4,776 · Crime & Legal+1 more: $500 · Crime & LegalCamp For All Foundation: $25,000 · Youth DevelopmentPRO-VISION INC: $25,000 · Religion
Other$1,496,975Health$249,350Human Services$165,885Education$87,250Crime & Legal$87,076Youth Development$25,000Religion$25,000

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetLEGACY COMMUNITY HEALTH SERVICES INC: $200,000 over 4y, 0.0% of budgetCHILD ADVOCATES INC: $81,800 over 6y, 0.3% of budgetCOVENANT HOUSE TEXAS: $60,000 over 3y, 0.2% of budgetSmall Steps Nurturing Center: $59,400 over 7y, 0.6% of budgetRAISEUP FAMILIES: $52,050 over 5y, 2.3% of budgetCrime Stoppers of Houston Inc: $40,000 over 4y, 0.5% of budgetHarris County Hospital District Foundation: $25,000 over 1y, 0.1% of budgetCamp For All Foundation: $25,000 over 5y, 0.2% of budgetPRO-VISION INC: $25,000 over 3y, 0.6% of budgetCATHOLIC CHARITIES OF THE ARCHDIOCESE OF GALVESTON - HOUSTON: $24,760 over 1y, 0.0% of budgetAmerican Heart Association Inc: $24,100 over 2y, 0.0% of budgetTHE WOMEN'S HOME: $20,000 over 2y, 0.2% of budgetHouston Golf Association Inc: $15,000 over 3y, 2.5% of budgetUniversity of St Thomas: $13,100 over 2y, 0.0% of budgetContemporary Arts Museum Houston: $10,000 over 2y, 0.1% of budgetUniversity of Houston Foundation: $10,000 over 1y, 0.1% of budgetTHE MUSEUM OF FINE ARTS HOUSTON: $10,000 over 1y, 0.0% of budgetSTAR OF HOPE MISSION: $10,000 over 1y, 0.0% of budgetAVDA: $5,750 over 2y, 0.1% of budgetEL CENTRO DE CORAZON: $4,776 over 3y, 0.0% of budgetSan Francisco Nativity Academy: $3,750 over 1y, 0.6% of budgetBakerRipley: $2,200 over 1y, 0.0% of budgetLATIN WOMENS INITIATIVE: $1,125 over 1y, 0.6% of budgetChildren's Assessment Center Foundation: $500 over 1y, 0.0% of budgetFOUNDATION FOR TEEN HEALTH: $250 over 1y, 0.2% of budget
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 LEGACY COMMUNITY HEALTH SERVICES INC ↗
  • Who funds CHILD ADVOCATES INC ↗
  • Who funds COVENANT HOUSE TEXAS ↗
  • Who funds Small Steps Nurturing Center ↗
  • Who funds RAISEUP FAMILIES ↗
  • Who funds Crime Stoppers of Houston Inc ↗
  • Who funds Harris County Hospital District Foundation ↗
  • Who funds Camp For All Foundation ↗
  • Who funds PRO-VISION INC ↗
  • Who funds CATHOLIC CHARITIES OF THE ARCHDIOCESE OF GALVESTON - HOUSTON ↗
  • Who funds American Heart Association Inc ↗
  • Who funds THE WOMEN'S HOME ↗
  • Who funds Houston Golf Association Inc ↗
  • Who funds University of St Thomas ↗
  • Who funds HOUSTON'S CHARITY FOR CHILDREN INC ↗
  • Who funds Contemporary Arts Museum Houston ↗
  • Who funds University of Houston Foundation ↗
  • Who funds THE MUSEUM OF FINE ARTS HOUSTON ↗
  • Who funds STAR OF HOPE MISSION ↗
  • Who funds AVDA ↗
  • Who funds EL CENTRO DE CORAZON ↗
  • Who funds San Francisco Nativity Academy ↗

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.

Greater Houston Commu…Shell USA Company Fou…Strake FoundationMarek Family Foundati…Albert & Ethel Herzst…Harry S & Isabel C Ca…Mechia FoundationThe Brown Foundation …The Alkek and William…Vivian L Smith Founda…Charity Guild of Cath…The Elkins Foundation
Greater Houston Community FoundationTX29.6× affinity14 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Greater Houston Community Foundation · Shell USA Company Foundation · Strake Foundation · Marek Family Foundation · Albert & Ethel Herzstein Charitable Foundation · Harry S & Isabel C Cameron Foundation Sentinel Trust Company · Mechia Foundation · The Brown Foundation Inc · The Alkek and Williams Foundation · Vivian L Smith Foundation · Charity Guild of Catholic Women of Harris County Inc · The Elkins Foundation

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

How much its grantees rely on government

Each dot is one organization Trini and OC Mendenhall Foundation funds: left to right is the share of its income from government, bottom to top the share from Trini and OC Mendenhall Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 00%0%1%3%5%funder's share of their income ↑0%19%38%56%75%share of the org’s income from government →
    no gov moneyreceives it· size = income
    0get no government money at all
    10report government grants on their 990 we could not trace to a source (not plotted)
    0rely on government for over half their income
    ⤢ axis zoomed · 0–75%
    typical government reliance, FY20–25
    How this is measured
    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 a grant caused the public funding. Coverage is precision-first, a floor rather than 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 to 24 months.
    05Through Plinth

    Warm introductions · Powered by PlinthPlus

    How do I get to Trini and OC Mendenhall Foundation?

    Find your warmest path to Trini and OC Mendenhall 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.

    On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 50 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

    How this is measured
    Each figure carries one of six labels. Filed is what the funder reported on its return. Official is another government record about an organization, such as a federal award or a charity register, joined by name where no shared identifier exists. Resolved is an identity we worked out where the filing named a recipient without an EIN, kept only above a measured confidence threshold. Computed is arithmetic over those, like themes, portfolio clusters and co-funder strength. Context is a statistic about a place rather than about an organization, which is what the need overlay is: it describes the area a grantee’s address sits in, not where its work lands. Inferred is drawn by a model from text, like the partnerships read out of public news and organization websites. Each is labeled where it appears.

    Generated from the IRS Form 990-PF e-file return for fiscal year 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

    Source object · view filing

    Play a game based on Trini and OC Mendenhall’s filings →

    More from the funding graph

    The unnamed billions
    grants reported with no recipient in the public record
    The regranting layer
    51% of grant dollars land in the regranting layer
    The DAF merry-go-round
    $9.7B circulates between donor-advised funds
    The endowment market
    who holds foundation money, and what just moved
    The camps
    funders cluster by geography, not ideology
    By state
    where grant money is based, and what stays home