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Plinth

· Public charity

Mountain Thrift Shoppe

Selling donations to the community to support other 501c3 organizations

$215k
Granted FY2025still arriving
10
Grants FY2025still arriving
1
States reached
$38k
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 FY20172025.

Environment$343kAnimals$303kArts & Culture$279kCommunity Improvement$150kHealth$141kEducation$112kHuman Services$108kPhilanthropy$80kOther$0
02FY2025 · 10 grants

Where the money goes

Your grants by size, and where they go.

$20,745
Median grant
1
States reached
$149k
Total assets
Largest grants
RecipientAmount
MOUNTAIN HUMANE SOCIETY$38,130
ARROWHEAD ARTS ASSOCIATION$33,110
SIERRA CLUB FOUNDATION$23,100
SB MOUNTAIN LAND TRUST$20,825
ROTARY CLUB OF LAKE ARROWHEAD$20,745
WOMENS CLUB OF LA$20,465
AMERICAN LEGION$17,365
MT COMMUNITY HOSPITAL AUXILARY INC$15,505
NEW FRIENDS OF THE LIBRARY$14,835
MOUNTAIN COMMUNITY ALLIANCE$10,920
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 (FY17–25) land where the poverty rate runs at 14%, against an area that typically sits at 13%. 100% of your dollars go to grantees based in above-average-need neighborhoods. Most of your grants land in higher-need ZIPs.

area typical 13%MOUNTAIN HUMANE SOCIETY: $40k → 14%ARROWHEAD ARTS ASSOCIATION: $35k → 14%SB MOUNTAIN LAND TRUST: $15k → 14%AMERICAN LEGION POST 360: $21k → 14%AMERICAN LEGION: $21k → 14%AMERICAN LEGION: $17k → 14%AMERICAN LEGION: $16k → 14%MOUNTAIN HUMANE SOCIETY: $39k → 14%ARROWHEAD ARTS ASSOCIATION: $39k → 14%MOUNTAIN HUMANE SOCIETY: $38k → 14%MOUNTAIN HUMANE SOCIETY: $37k → 14%ARROWHEAD ARTS ASSOCIATION: $37k → 14%MOUNTAIN HUMANE SOCIETY: $34k → 14%MOUNTAIN HUMANE SOCIETY: $34k → 14%ARROWHEAD ARTS ASSOCIATION: $33k → 14%ARROWHEAD ARTS ASSOCIATION: $32k → 14%MOUNTAIN HUMANE SOCIETY: $30k → 14%ARROWHEAD ARTS ASSOCIATION: $29k → 14%MOUNTAIN HUMANE SOCIETY: $29k → 14%ARROWHEAD ARTS ASSOCIATION: $28k → 14%ARROWHEAD ARTS ASSOCIATION: $27k → 14%WOMENS CLUB OF LA: $25k → 14%MOUNTAIN HUMANE SOCIETY: $22k → 14%SB MOUNTAIN LAND TRUST: $21k → 14%WOMENS CLUB OF LA: $20k → 14%MT COMMUNITY HOSPITAL AUXILIARY INC: $20k → 14%SB MOUNTAIN LAND TRUST: $19k → 14%ARROWHEAD ARTS ASSOCIATION: $19k → 14%SB MOUNTAIN LAND TRUST: $19k → 14%MT COMMUNITY HOSPITAL AUXILARY INC: $19k → 14%MT COMMUNITY HOSPITAL AUXILARY INC: $18k → 14%MT COMMUNITY HOSPITAL AUXILARY INC: $17k → 14%SB MOUNTAIN LAND TRUST: $16k → 14%MT COMMUNITY HOSPITAL AUXILARY INC: $16k → 14%MT COMMUNITY HOSPITAL AUXILARY INC: $15k → 14%SB MOUNTAIN LAND TRUST: $15k → 14%NEW FRIENDS OF THE LIBRARY: $39k → 14%SIERRA CLUB FOUNDATION: $23k → 14%ROTARY CLUB OF LAKE ARROWHEAD: $23k → 14%ROTARY CLUB OF LAKE ARROWHEAD: $21k → 14%SIERRA CLUB FOUNDATION: $19k → 14%SIERRA CLUB FOUNDATION: $18k → 14%SIERRA CLUB FOUNDATION: $18k → 14%SIERRA CLUB FOUNDATION: $17k → 14%SIERRA CLUB FOUNDATION: $16k → 14%SIERRA CLUB FOUNDATION: $16k → 14%SIERRA CLUB FOUNDATION: $16k → 14%ROTARY CLUB OF LAKE ARROWHEAD: $15k → 14%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.

100%of every dollar goes to organizations you’ve funded before.
$1.6M · 11 repeat orgs$0 to everyone else

11 repeat relationships — 10 still active in FY2025, 1 since wound down.

How the two cohorts compare

Re-uppedFunded once

Organizations

11
0

Total granted

$1.6M
$0

Still filing today

55%
0%

New vs renewed · share of each year

In FY2025, 100% of grant dollars renewed an existing relationship; $0 went to new ones.

50%100%’17’18’19’20’21’22’23’24’25
RenewedFirst-time

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

’17’18’19’20’21’22’23’24’25
EnvironmentAnimalsArts & CultureOther

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

  • MH
    MOUNTAINS HUMANE SOCIETY
    9× · 2017–2025 · $303k · revenue +92% · 65% of their budget
  • AA
    ARROWHEAD ARTS ASSOCIATION
    9× · 2017–2025 · $279k · revenue -13% · 27% of their budget
  • SC
    SIERRA CLUB FOUNDATION
    9× · 2017–2025 · $153k · revenue -55%

Funded once

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

    04Your field
    04the grantee network

    6 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. 6 of the 11 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.

    4
    Load-bearing (≥25% of a budget)
    2
    Early backer (in before they grew)
    6/6
    Grantees still filing
    2/6
    Grew since you first funded

    Where your money sits — by cause, then by grantee

    MOUNTAINS COMMUNITY HOSPITAL AUXILIARY INC — $140,700 · OtherMOUNTAINS COMMUNITY HOSPITAL AUXILIARY INCAMERICAN LEGION POST 360 — $133,542 · OtherAMERICAN LEGION POST 360NEW FRIENDS OF THE LIBRARY — $111,722 · OtherNEW FRIENDS OF THE LIBRARYWOMENS CLUB OF LA — $107,560 · OtherWOMENS CLUB OF LAMOUNTAIN COMMUNITY ALLIANCE — $78,418 · OtherMOUNTAIN COMMUNITY ALLIANCEROTARY CLUB OF LAKE ARROWHEAD — $71,528 · OtherROTARY CLUB OF LAKE ARROWHEADRim of the World Interpretive — $50,814 · OtherRim of the World InterpretiveMOUNTAINS HUMANE SOCIETY — $303,095 · AnimalsMOUNTAINS HUMANE SOCI…SIERRA CLUB FOUNDATION — $152,711 · EnvironmentSIERRA CLUB FOUNDATIO…SAN BERNARDINO MOUNTAINS LAND TRUST — $139,218 · EnvironmentSAN BERNARDINO MOUNTA…ARROWHEAD ARTS ASSOCIATION — $279,058 · Arts & CultureARROWHEAD ARTS ASSOC…
    Other$694,284Animals$303,095Environment$291,929Arts & Culture$279,058

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

    25%50%75%100%$100k$1.0M$10M$100Mgrantee revenue →↑ your share of their budgetMOUNTAINS HUMANE SOCIETY — $303,095 over 9y, 65% of budgetARROWHEAD ARTS ASSOCIATION — $279,058 over 9y, 27% of budgetSIERRA CLUB FOUNDATION — $152,711 over 9y, 0.1% of budgetMOUNTAINS COMMUNITY HOSPITAL AUXILIARY INC — $140,700 over 9y, 86% of budgetSAN BERNARDINO MOUNTAINS LAND TRUST — $139,218 over 9y, 11% of budgetRim of the World Interpretive — $50,814 over 5y, 45% 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.

    • Who funds MOUNTAINS HUMANE SOCIETY
    • Who funds ARROWHEAD ARTS ASSOCIATION
    • Who funds SIERRA CLUB FOUNDATION
    • Who funds MOUNTAINS COMMUNITY HOSPITAL AUXILIARY INC
    • Who funds SAN BERNARDINO MOUNTAINS LAND TRUST
    • Who funds Rim of the World Interpretive

    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× affinity4 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 Mountain Thrift Shoppe 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.

    2024
    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
      1report 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.

      05Through Plinth

      Warm introductions · Powered by PlinthPlus

      How do I get to Mountain Thrift Shoppe?

      Find your warmest path to Mountain Thrift Shoppe 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 directly from IRS e-file XML — your own 990/990-PF and the multi-year returns of the 11 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