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Plinth

· Public charity

Limestone Charter Association

Our mission is to serve as the cornerstone of charter school authorizing in sc and to facilitate a positive educational environment that fosters school autonomy through support and oversight to our member schools.

$85M
Granted FY2025still arriving
13
Grants FY2025still arriving
1
States reached
$17M
Largest
01What you fund
01100% classified

What you funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year — across FY20232025.

Education$142M
02FY2025 · 13 grants

Where the money goes

Your grants by size, and where they go.

$6,239,258
Median grant
1
States reached
$1.3M
Total assets
Largest grants
RecipientAmount
HORSE CREEK ACADEMY$17,053,691
SC LEADERSHIP PREPARATORY SCHOOL$9,606,570
GLOBAL ACADEMY OF SOUTH CAROLINA$7,525,508
LEGION COLLEGIATE ACADEMY$6,942,890
OCEANSIDE COLLEGIATE ACADEMY$6,932,214
SUMMERVILLE PREPARATORY ACADEMY$6,795,439
ORANGEBURG HIGH SCHOOL FOR HEALTH$6,239,258
ATLANTIC COLLEGIATE ACADEMY$5,617,674
MOUNTAIN VIEW PREPARATORY$5,539,228
SC PREPARATORY ACADEMY$4,070,996
GOUCHER CHARTER ACADEMY$3,365,382
EAST LINK ACADEMY$2,942,527
COASTAL HIGH SCHOOL$2,801,643
02The need
03

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.

show:

Dollar for dollar, your grants (FY23–25) land where the poverty rate runs at 16%, against an area that typically sits at 12%. 81% of your dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.

area typical 12%LEGION COLLEGIATE ACADEMY: $6.9M → 8%EAST LINK ACADEMY: $2.9M → 10%SUMMERVILLE PREPARATORY ACADEMY: $6.8M → 11%OCEANSIDE COLLEGIATE ACADEMY: $6.9M → 12%COASTAL HIGH SCHOOL: $3.1M → 13%GLOBAL ACADEMY OF SOUTH CAROLINA: $7.5M → 15%SC LEADERSHIP PREPARATORY SCHOOL: $9.6M → 15%HORSE CREEK ACADEMY: $17.1M → 17%GOUCHER CHARTER ACADEMY: $3.4M → 17%ORANGEBURG HIGH SCHOOL FOR HEALTH: $6.4M → 25%EAST LINK ACADEMY: $2.9M → 10%COASTAL HIGH SCHOOL: $2.8M → 13%GLOBAL ACADEMY OF SOUTH CAROLINA: $2.9M → 15%SC PREPARATORY ACADEMY: $4.1M → 15%HORSE CREEK ACADEMY: $15.8M → 17%GOUCHER CHARTER ACADEMY: $1.6M → 17%ORANGEBURG HIGH SCHOOL FOR HEALTH: $6.2M → 25%COASTAL LEADERSHIP ACADEMY: $2.7M → 13%MOUNTAIN VIEW PREPARATORY: $5.5M → 15%HORSE CREEK ACADEMY: $13.1M → 17%ORANGEBURG CONSOLIDATED SCHOOL D5: $5.7M → 25%ATLANTIC COLLEGIATE ACADEMY: $5.6M → 13%ATLANTIC COLLEGIATE ACADEMY: $2.8M → 13%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount

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.

03Your edge
repeat funding

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.

72%of every dollar goes to organizations you’ve funded before.
$102M · 7 repeat orgs$40M to everyone else

And the relationships you keep tend to grow: grantees you re-up on have seen median revenue of +22% since the first grant, against 0% for the ones you funded once.

7 repeat relationships — 7 still active in FY2025, 0 since wound down; 5 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

7
5

Total granted

$102M
$40M

Median revenue growth · since first grant

+22%
0%

Still filing today

100%
80%

New vs renewed · share of each year

In FY2025, 53% of grant dollars renewed an existing relationship; $40M went to new ones.

50%100%’23’24’25
RenewedFirst-time

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

  • HC
    HORSE CREEK ACADEMY
    3× · 2023–2025 · $46M · revenue +20% · 92% of their budget
  • OC
    ORANGEBURG CONSOLIDATED SCHOOL DISTICT 5 HIGH SCHOOL FOR HEALTH PROFESSIONS
    3× · 2023–2025 · $18M · revenue +22% · 99% of their budget
  • GA
    GLOBAL ACADEMY OF SOUTH CAROLINA
    2× · 2024–2025 · $10M · revenue +124% · 87% of their budget

Funded once

  • SC
    South Carolina Preparatory Academy
    one grant, 2025 · $11M · revenue 0%
  • SL
    SC LEADERSHIP PREPARATORY SCHOOL
    one grant, 2025 · $9.6M
  • LC
    LEGION COLLEGIATE ACADEMY
    one grant, 2025 · $6.9M · revenue 0% · 86% of their budget

Repeat = funded in two or more distinct years; growth and survival are read from each grantee’s own subsequent IRS filings.

04Your field

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.

1
Pacific Coast Academy

Provide a high standard of education to students through comprehensive curriculum supported by energetic, dynamic, and caring teachers.

Education
2
Cape Fear Academy

To operate a private school for pre-kindergarten through grade 12 in Wilmington, NC

Education
3
Greenville Classical Academy

Provide a distinctly Christ-centered, biblical and classical education producing students who glorify God in their thoughts, words and deeds.

Education
4
Oconee Christian Academy

Oconee Christian Academy exists to glorify God by nurturing students and equipping them to fulfill God's unique purpose for their lives.

Education
5
River Mill Academy

Operation of a north carolina public charter school

Education
6
Alliance Charter Academy

Our mission is to personalize learning through a collaboration of family, community and school; to nurture the innate curiosity of our students; ignite their passion for learning; and prepare them for lifelong success.

Education
7
Academy of Charter Schools Inc

Form 990 - Organizations Mission The Academy provides education to Pre-Kindergarten through 12th Grade students. The Academy serves our students to develop college ready exemplary citizens by promoting excellence in academics character and…

Education
8
Ocean Academy Charter School

To provide elementary students with a high quality and student-centered education in a safe, nurturing, and challenging environment so that all students achieve their highest level of academic success.

9
The New American Academy Charter School

The new american academy charter school empowers learners and inspires leaders to make this a better world. through our collaborative teacher teams, mastery-based career ladder, and looping cycles, we offer personalized rigorous…

Education
10
Coastal Christian High School Inc

Provide faith based education with an emphasis on college preparation.

Education
11
Compass Collegiate Academy

Compass collegiate academy's mission is to provide every scholar with the academic foundation and strong habits that inspire and cultivate lifelong learners who lead purposeful, civic lives.

Education
12
Marco Island Academy a Public Charter High School

To provide a student - centered, well rounded interdisciplinary education. student will engage in critical thinking while focusin on math, science, technology, enviromental and global studies.

For reference, the grantee most central to the portfolio’s shape is Atlantic Collegiate Academy and the most unlike its peers is Orangeburg Consolidated School Distict 5 High School for Health Professions. 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

11 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 20172025, not grant rows in a single year — so this will not match the grant count on the cover. 11 of the 12 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.

10
Load-bearing (≥25% of a budget)
3
Early backer (in before they grew)
11/11
Grantees still filing
7/11
Grew since you first funded

Where your money sits — by cause, then by grantee

HORSE CREEK ACADEMY — $45,949,640 · EducationHORSE CREEK ACADEMYORANGEBURG CONSOLIDATED SCHOOL DISTICT 5 HIGH SCHOOL FOR HEALTH PROFESSIONS — $18,336,827 · EducationORANGEBURG CONSOLIDATED SCHOOL DISTICT 5 HIGH SCHOOL FOR HEALTH PROFESSIONSSouth Carolina Preparatory Academy — $10,866,435 · EducationSouth Carolina Preparatory AcademyCOASTAL HIGH SCHOOL — $8,567,591 · EducationCOASTAL HIGH SCHOOLATLANTIC COLLEGIATE ACADEMY — $8,409,794 · EducationATLANTIC COLLEGIATE ACADEMYLEGION COLLEGIATE ACADEMY — $6,942,890 · EducationLEGION COLLEGIATE ACADEMYOCEANSIDE COLLEGIATE ACADEMY — $6,932,214 · EducationOCEANSIDE COLLEGIATE ACADEMYEAST LINK ACADEMY — $5,809,421 · EducationMOUNTAIN VIEW PREPARATORY — $5,539,228 · EducationGOUCHER CHARTER SCHOOL — $4,959,408 · EducationGLOBAL ACADEMY OF SOUTH CAROLINA — $10,430,050 · OtherGLOBAL ACADEMY …SC LEADERSHIP PREPARATORY SCHOOL — $9,606,570 · OtherSC LEADERSHIP P…
Education$122,313,448Other$20,036,620

Each org by its size and your share of it — top-left is where you’re load-bearing

25%50%75%100%$10Mgrantee revenue →↑ your share of their budgetHORSE CREEK ACADEMY — $45,949,640 over 3y, 92% of budgetORANGEBURG CONSOLIDATED SCHOOL DISTICT 5 HIGH SCHOOL FOR HEALTH PROFESSIONS — $18,336,827 over 3y, 99% of budgetGLOBAL ACADEMY OF SOUTH CAROLINA — $10,430,050 over 2y, 87% of budgetCOASTAL HIGH SCHOOL — $8,567,591 over 3y, 97% of budgetATLANTIC COLLEGIATE ACADEMY — $8,409,794 over 2y, 88% of budgetLEGION COLLEGIATE ACADEMY — $6,942,890 over 1y, 86% of budgetOCEANSIDE COLLEGIATE ACADEMY — $6,932,214 over 1y, 84% of budgetEAST LINK ACADEMY — $5,809,421 over 2y, 95% of budgetMOUNTAIN VIEW PREPARATORY — $5,539,228 over 1y, 92% of budgetGOUCHER CHARTER SCHOOL — $4,959,408 over 2y, 86% of budget
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.

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 set of overlaps that mostly run through you, not between each other.

Amazonsmile FoundationWA1.5× affinity5 shared granteesties to 0 of 0Hover any node to trace its alignments.Compare side by side →

Open a dossier: 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 Limestone Charter Association 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.

2025
202122232425
no gov · 00%6%25%56%100%your share of their income ↑0%1%3%4%5%share of the org’s income from government
    no gov moneyreceives it· size = income
    0get no government money at all
    11report government grants on their 990 we could not trace to a source (not plotted)
    0rely on government for over half their income
    ⤢ axis zoomed · 0–5%
    typical government reliance, FY2025

    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.

    On method. Every financial figure here is read directly from IRS e-file XML — your own 990/990-PF and the multi-year returns of the 12 grantees we resolved across every year we hold, several hundred filings in all (a different count from the grant rows on the cover, which are one fiscal year)— each linked to its source. Grantee achievements and outcomes are each organization’s own program-service reporting (Form 990, Part III); we read these as association with sustained funding — the foundation is one of several forces — suppress low-confidence name matches rather than guess, and say so where a figure rests on a single grant or filing. Not everything on this page is a filed figure, and the difference matters. Filed is what you reported on your 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. How we build these →

    Generated from your IRS Form 990 e-file return for fiscal year 2025, released 2025. Filings run roughly 12–24 months behind; figures are dated accordingly.

    Source object · view filing

    More from the funding graph