· Public charity
Ann Arbor PTO Thrift Shop Inc
We are a local, nonprofit thrift shop promoting equity in our community by supporting Ann Arbor Public Schools parent teacher organizations and student activities.
What you funded, over time
Every grant placed by its stated purpose and the recipient’s mission, by year — across FY2017–2025.
Where the money goes
Your grants by size, and where they go.
The 21 grants below total $275,338 — the rows itemised in this filing. The $322,462 headline is the total grant expense reported on the return, so the remaining $47,124 is giving the schedule does not break out: grants under the $5,000 itemisation floor, grants to individuals, and grants reported on other schedules. Every figure below describes the itemised rows only.
By grant size · FY2025
- Under $10k15 grants · $109k
- $10k–50k5 grants · $66k
- $50k–250k1 grant · $100k
| Recipient | Amount |
|---|---|
| Ann Arbor Public Schools | $100,000 |
| Pioneer High School PTSO | $16,690 |
| Scarlett Middle School PTSO | $16,383 |
| Bryant-Pattengill PTO | $12,171 |
| Mitchell Elementary School PTO | $10,675 |
| Carpenter Elementary School PTO | $10,051 |
| Pittsfield Elementary School PTO | $9,382 |
| Allen Elementary School Parent Council | $9,013 |
| Community High School PTO | $8,636 |
| Tappan Middle School PTSO | $8,410 |
| Clague Middle School PTSO | $8,183 |
| Abbot Elementary School PTO | $8,146 |
| Huron High School PTSO | $7,961 |
| Slauson Middle School PTSO | $7,216 |
| Skyline High School PTSO | $7,057 |
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.
Your human-services grants (FY22–25, $53k) land where the poverty rate runs at 14%, against an area that typically sits at 8%. 100% of those 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.
23 repeat relationships — 20 still active in FY2025, 3 since wound down; 1 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, 98% of grant dollars renewed an existing relationship; $5k 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
- AAANN ARBOR PUBLIC SCHOOLS8× · 2017–2025 · $342k
- AAANN ARBOR PIONEER HIGH SCHOOL PARENT TEACHER ORGANIZATION4× · 2022–2025 · $48k · revenue +9%
- SPSCARLETT PTSO3× · 2023–2025 · $47k
Funded once
- MLMARTIN LUTHER KING JR ELEMENTARY SCHOOL PTOone grant, 2024 · $5k · revenue +23%
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.
Parent and teacher organization for middle school
The PTO seeks to help build community among students and families through spirit days and special events throughout the year. The PTO also organizes events to help care for Stony Point teachers and staff in tangible ways. The Stony Point…
Support for school related programs for the benefits of students.
Education
The ptso raises money through fundrasising activities which is then distributed to teachers on an as-needed basis for classroom supplies, teaching resources, and equipment
Support lakeview school parents
Supports school activities of Ashland City Schools
Elementary school support of teachers, students, and parents to promote eduational objectives
School support provided by parents and teachers.
Parent teacher organization
Aid the students of ahes
Support school and education.
For reference, the grantee most central to the portfolio’s shape is Bryant Pattengill Pto and the most unlike its peers is Ann Arbor Skyline High School Parent Teacher Student Organizatio. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
Your grantees are a median of 25 years old; the field is 15. You back the established end — and your money leans older still.
The field is 23% startups (under 5 years old) — 14% of your grantees by number, and just 10% of your money.
The orgs you fund almost never close — 4% lost their exemption, against 13% of the field you don’t fund.
Age = years since IRS exemption (a founding proxy). “Closed” = auto-revocation for 3 years of non-filing — a floor on closure, not proof, and bigger established orgs lapse least. Association, not causation.
12 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. 12 of the 25 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.
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 ANN ARBOR PIONEER HIGH SCHOOL PARENT TEACHER ORGANIZATION ↗
- Who funds SCARLETT PTSO ↗
- Who funds BRYANT PATTENGILL PTO ↗
- Who funds HURON HIGH SCHOOL PTSO ↗
- Who funds TAPPAN PTSO ↗
- Who funds ANN ARBOR SKYLINE HIGH SCHOOL PARENT TEACHER STUDENT ORGANIZATIO ↗
- Who funds ABBOT ELEMENTARY SCHOOL PTO ↗
- Who funds SLAUSON MIDDLE SCHOOL PTSO ↗
- Who funds ANN ARBOR HURON HIGH SCHOOL BOOSTER CLUB INC ↗
- Who funds THURSTON PARENT TEACHER ORGANIZATIO ↗
- Who funds BURNS PARK SCHOOL PARENT TEACHER OR ↗
- Who funds MARTIN LUTHER KING JR ELEMENTARY SCHOOL PTO ↗
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: American Online Giving Foundation Inc · 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 Ann Arbor PTO Thrift Shop 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 Ann Arbor PTO Thrift Shop Inc?
Find your warmest path to Ann Arbor PTO Thrift Shop 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.