· Private foundation
Mark and Martha Slaughter Family Foundation Inc
THE FOUNDATION WAS FORMED TO PROMOTE AND SUPPORT CARDIOVASCULAR AND THORACIC SURGERY EDUCATION ALONG WITH CLINICAL AND BASIC SCIENCE RESEARCH FOR PHYSICIANS, SCIENTISTS, NURSES AND OTHER MEDICAL PERSONNEL.
What you funded, over time
Every grant clustered by its grantee’s IRS cause code (NTEE), by year — across FY2023–2025.
Where the money goes
Your grants by size, and where they go.
| Recipient | Amount |
|---|---|
| BERNHEIM ARBORETUM & RESEARCH FOREST | $5,000 |
| PURDUE RESEARCH FOUNDATION | $5,000 |
| ISHLT FOUNDATION | $5,000 |
| AMERICAN HEART ASSOCIATION | $1,000 |
| LOUISVILLE COLLEGIATE SCHOOL | $1,000 |
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 (FY23–25) land where the poverty rate runs at 14%, against an area that typically sits at 12%. 75% 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.
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.
And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +10% since the first grant, against -1% for the ones you funded once.
4 repeat relationships — 3 still active in FY2025, 1 since wound down; 2 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, 65% of grant dollars renewed an existing relationship; $6k 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
- SASPEED ART MUSEUM2× · 2023–2024 · $12k · revenue +31%
- IWISAAC W BERNHEIM FOUNDATION3× · 2023–2025 · $11k · revenue +0%
- AHAmerican Heart Association Inc2× · 2024–2025 · $6k · revenue +10%
Funded once
- KMKMAC MUSEUMone grant, 2024 · $2k · revenue -1%
- KHKENTUCKY HORSE PARK FOUNDATION INCone grant, 2024 · $2k · revenue -1%
- ILIMPACT100 LOUISVILLE INCone grant, 2024 · $1k · revenue 0%
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.
Lead the transformation of healthcare through quality, innovation & education, and make Indiana one of the nation's healthiest states.
To acquire, maintain, improve, leverage, manage, lease, and convey real and personal property for the benefit of the university of louisville.
The kentucky college of art and design opens the door to a creative and productive life through an undergraduate education in the contemporary arts.
The bac is committed to provide excellence in design education grounded in practice and accessible to diverse communities.
See Disclosure Above.
The mission of the foundation is to improve the health and well-being of the communities served by jefferson hospital through engagement, community-driven research and grantmaking. there are three grantmaking priorities focused on the…
Lead the transformation of healthcare through quality, innovation & education, and make Indiana one of the nation's healthiest states.
To improve the quality of life for all kentuckians through research, education and advocacy on important policy issues facing the commonwealth.
To provide effective advocacy for the financial services industry both in kentucky and on a national level; to serve as a reliable and responsive source of information and education about areas of interest to the industry; and to provide a…
To collect, display and interpret objects in craft art and design.
Indiana university health foundation leverages the power of philanthropy to support the iu health goal of making indiana one of the healthiest states in the nation.
To provide care to our community and to serve as a major teaching hospital for education and training in medicine, dentistry, nursing, and allied health professions.
For reference, the grantee most central to the portfolio’s shape is Speed Art Museum and the most unlike its peers is Kmac 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.
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 SPEED ART MUSEUM ↗
- Who funds ISAAC W BERNHEIM FOUNDATION ↗
- Who funds ISHLT FOUNDATION ↗
- Who funds American Heart Association Inc ↗
- Who funds Purdue Research Foundation ↗
- Who funds KMAC MUSEUM ↗
- Who funds KENTUCKY HORSE PARK FOUNDATION INC ↗
- Who funds LOUISVILLE COLLEGIATE SCHOOL ↗
- Who funds IMPACT100 LOUISVILLE INC ↗
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: Klig Charitable Trust · Kindred Foundation Inc · Sociable Weaver Foundation Inc · W L Lyons Brown Foundation · Snowy Owl Foundation Inc · The Community Foundation of Louisville Depository Inc · The Community Foundation of Louisville Inc · Baird Foundation Inc · National Philanthropic Trust · American Online Giving Foundation Inc · Fidelity Investments Charitable Gift Fund · Donor Advised Charitable Giving Inc
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 Martha Slaughter Family Foundation Inc 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 Martha Slaughter Family Foundation Inc?
Find your warmest path to Mark and Martha Slaughter Family Foundation Inc 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.