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Martha P Mack Foundation at a glance

· Private foundation

Martha P Mack 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.

$1.8M
Granted FY2024still arriving
9
Grants FY2024still arriving
2
States reached
$500k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
01What it funds
01100% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2022 to 2024.

Health$2.1MEducation$906kScience & Tech$200kHousing & Shelter$100kHuman Services$80k
02FY2024 · 9 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2024

  • Under $10k1 grant · $5k
  • $10k–50k1 grant · $25k
  • $50k–250k4 grants · $350k
  • $250k+3 grants · $1.4M
$100,000
Median grant
2
States reached
$23M
Total assets
Largest grants
RecipientAmount
SCRIPPS HEALTH FOUNDATION$500,000
SANFORD BURNHAM PREBYS$500,000
UC SAN DIEGO FOUNDATION$405,000
THE SCRIPPS RESEARCH INSTITUTE$100,000
SALK INSTITUTE FOR BIOLOGICAL STUDIES$100,000
SHARP HEALTHCARE FOUNDATION$100,000
THE SALVATION ARMY$50,000
SOUTHERN METHODIST UNIVERSITY$25,000
LA JOLLA INSTITUTE OF IMMUNOLOGY$5,000
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:

Dollar for dollar, its grants (FY22–24) land where the poverty rate runs at 11%, against an area that typically sits at 11%. 7% of its dollars go to grantees based in above-average-need neighborhoods. Its grants skew toward lower-need ZIPs.

area typical 11%SANFORD BURNHAM PREBYS: $500k → 11%THE SALVATION ARMY VENTURA RESIDENCES IN: $100k → 14%SOUTHERN METHODIST UNIVERSITY: $26k → 14%SANFORD BURNHAM PREBYS MEDICAL DISCOVERY: $200k → 11%THE SALVATION ARMY: $50k → 14%SOUTHERN METHODIST UNIVERSITY: $25k → 14%SALK INSTITUTE FOR BIOLOGICAL STUDIES: $100k → 11%SANFORD BURNHAM PREBYS MEDICAL DISCOVERY: $100k → 11%THE SCRIPPS RESEARCH INSTITUTE: $100k → 11%SHARP HEALTHCARE FOUNDATION: $100k → 11%SALK INSTITUTE FOR BIOLOGICAL STUDIES: $100k → 11%SUPPORT THE ENLISTED PROJECT INC: $30k → 11%SCRIPPS HEALTH: $600k → 11%UNIVERSITY OF SAN DIEGO: $250k → 11%UC SAN DIEGO FOUNDATION: $405k → 11%U C SAN DIEGO FOUNDATION: $100k → 11%REGENTS OF THE UNIVERSITY OF CALIFORNIA: $100k → 11%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.

78%of every dollar goes to organizations it has funded before.
$2.7M · 5 repeat orgs$735k to everyone else

5 repeat relationships: 5 still active in FY2024, 0 since wound down; 4 grantees were first funded in FY2024 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

5
4

Total granted

$2.7M
$480k

Median revenue growth · since first grant

+12%
+34%

Still filing today

100%
50%

New vs renewed · share of each year

In FY2024, 86% of grant dollars renewed an existing relationship; $255k went to new ones.

50%100%’22’23’24
RenewedFirst-time

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

’22’23’24
HealthEducationScience & TechHousing & ShelterPublic BenefitOther
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

  • SH
    SCRIPPS HEALTH
    2× · 2023–2024 · $1.1M · revenue +24%
  • SB
    SANFORD BURNHAM PREBYS MEDICAL DISCOVERY INSTITUTE
    3× · 2022–2024 · $800k · revenue +7%
  • US
    UC SAN DIEGO FOUNDATION
    2× · 2023–2024 · $505k · revenue +33%

Funded once

  • UO
    UNIVERSITY OF SAN DIEGOgraduated
    one grant, 2023 · $250k · revenue +34%
  • RO
    REGENTS OF THE UNIVERSITY OF CALIFORNIA
    one grant, 2022 · $100k
  • TS
    THE SALVATION ARMY VENTURA RESIDENCES INC
    one grant, 2022 · $100k · revenue +4%
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
University of Southern California

The central mission of the university of southern california is the development of human beings and society as a whole through the cultivation and enrichment of the human mind and spirit. the principal means by which our mission is…

Education
2
Southern California University of Health Sciences

The mission of southern california university of health sciences (scu) is to educate students as competent, caring and successful practitioners of integrative healthcare. the university is committed to providing excellence in academics,…

Education
3
Stony Brook Surgical Associates University Faculty Practice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
4
La Jolla Institute for Immunology

At la jolla institute for immunology, our scientists focus on understanding how the immune system works in order to promote human health and prevent disease. our discoveries apply to many diseases, ranging from diabetes to heart disease,…

—
5
Stony Brook Internists University Faculty Practice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
6
California Institute for Immunology and Immunotherapy

To harness the power of the human immune system and advanced computing technologies to create and translate scientific discoveries into next generation vaccines and therapies for prevention, control and cure of chronic diseases, enabling…

Health
7
The Graduate School of the Stowers Institute for Medical Research

The graduate school of the stowers institute for medical research ("gssimr") exempt purpose is to provide graduate education that will prepare scholars for scientific research in the biological sciences.

Education
8
President-Board of Trustees Santa Clara College

Scu is a catholic and jesuit institution that makes student learning its central focus, promotes faculty and staff learning in its various forms, and exhibits organizational learning.

Education
9
Neurology Associates of Stony Brook University Faculty Practice Corp

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
10
California Institute for BioMedical Research

Our mission is to build a unique institute that bridges basic research and drug discovery, and that attracts the best and brightest scientists, physicians and students to work together synergistically to find cures for neglected human…

—
11
Stony Brook Urology University Faculty Practice Corporation

Provide clinical instruction to and supervision of medical school students, interns and residents and, incident thereto, rendering professional services.

Health
12
The Board of Trustees of the Leland Stanford Junior University

Stanford university is one of a select group of american universities that have achieved eminence in both undergraduate and graduate education and research - cont'd sch o.

Education
How this is measured
The grantee most central to the portfolio’s shape is Uc San Diego Foundation; the most unlike its peers is Sanford Burnham Prebys Medical Discovery Institute. 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

10 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. 10 of the 13 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)
1
Early backer (in before they grew)
9/10
Grantees still filing
8/10
Grew since first funded

Where the money sits, by cause and then by grantee

SCRIPPS HEALTH: $1,100,000 · HealthSCRIPPS HEALTHSANFORD BURNHAM PREBYS MEDICAL DISCOVERY INSTITUTE: $800,000 · HealthSANFORD BURNHAM PREBYS MEDICAL DISCOVERY INSTITUTETHE SCRIPPS RESEARCH INSTITUTE: $100,000 · HealthSharp Healthcare Foundation: $100,000 · HealthUC SAN DIEGO FOUNDATION: $505,000 · EducationUC SAN DIEGO FOUND…Southern Methodist University: $51,000 · EducationSouthern Methodist…UNIVERSITY OF SAN DIEGO: $250,000 · OtherUNIVERSITY OF…REGENTS OF THE UNIVERSITY OF CALIFORNIA: $100,000 · OtherREGENTS OF TH…THE SALVATION ARMY: $50,000 · OtherTHE SALVATION…+1 more: $5,000 · OtherThe Salk Institute for Biological Studies: $200,000 · Science & TechTHE SALVATION ARMY VENTURA RESIDENCES INC: $100,000 · Housing & ShelterSUPPORT THE ENLISTED PROJECT INC: $30,000 · Public Benefit
Health$2,100,000Education$556,000Other$405,000Science & Tech$200,000Housing & Shelter$100,000Public Benefit$30,000

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

25%50%75%100%$10M$100Mgrantee revenue →↑ funder's share of their budgetSCRIPPS HEALTH: $1,100,000 over 2y, 0.0% of budgetSANFORD BURNHAM PREBYS MEDICAL DISCOVERY INSTITUTE: $800,000 over 3y, 0.4% of budgetUC SAN DIEGO FOUNDATION: $505,000 over 2y, 0.2% of budgetUNIVERSITY OF SAN DIEGO: $250,000 over 1y, 0.1% of budgetThe Salk Institute for Biological Studies: $200,000 over 2y, 0.1% of budgetTHE SCRIPPS RESEARCH INSTITUTE: $100,000 over 1y, 0.0% of budgetSharp Healthcare Foundation: $100,000 over 1y, 0.3% of budgetSouthern Methodist University: $51,000 over 2y, 0.0% of budgetSUPPORT THE ENLISTED PROJECT INC: $30,000 over 1y, 1.1% 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.

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.

Rancho Santa Fe Found…Jewish Community Foun…The San Diego Foundat…Donor Advised Charita…Fidelity Investments …Amazonsmile Foundation
Rancho Santa Fe FoundationCA13.7× affinity4 shared granteesties to 5 of 5Hover any node to trace its alignments.Compare side by side →

Open a dossier: Rancho Santa Fe Foundation · Jewish Community Foundation of San Diego · The San Diego Foundation · Donor Advised Charitable Giving Inc · Fidelity Investments Charitable Gift Fund · Amazonsmile 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 Martha P Mack Foundation funds: left to right is the share of its income from government, bottom to top the share from Martha P Mack 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
    2report 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.

    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 13 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 Martha P Mack’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