· Private foundation
The Irwin Andrew Porter Foundation
Its FY2025 filing reports that it funds preselected organizations and did not take unsolicited requests; check the foundation's own site before ruling it out.
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.
By grant size · FY2025
- $10k–50k1 grant · $40k
- $50k–250k2 grants · $120k
| Recipient | Amount |
|---|---|
| Environmental Law Alliance | $60,000 |
| Environmental Law Alliance | $60,000 |
| Acate Amazon Conservation | $40,000 |
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.
Your human-services grants (FY20–22, $126k) land where the poverty rate runs at 6%, against an area that typically sits at 10%. 8% of those dollars go to grantees based in above-average-need neighborhoods. Your grants skew toward lower-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.
Which US states your grants reach
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.
12 repeat relationships — 2 still active in FY2025, 10 since wound down.
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, 100% of grant dollars renewed an existing relationship; $0 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
- AAACATE AMAZON CONSERVATION INC7× · 2017–2025 · $279k · revenue +275% · 95% of their budget
UPSTREAM ARTS INC6× · 2017–2023 · $145k · revenue +48%- DRDAKOTA RESOURCE COUNCIL2× · 2020–2021 · $80k · revenue +90%
Funded once
- MFMINNESOTA FRINGE FESTIVALgraduatedone grant, 2021 · $150k · revenue +33% · 29% of their budget
- CCCook County Grand Marais Economic Done grant, 2020 · $112k
- ARArrowhead Regional Artsone grant, 2020 · $50k
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.
The intertribal agriculture council was founded in 1987 to pursue and promote the conservation, development and use of our agricultural resources of american indian and alaska native tribes.
Grist is an independent, non profit media organization dedicated to reporting on climate change.
To lead and coordinate the global initiative to address and prevent criminalization, violence, and impunity against indigenous peoples towards strengthening their collectives, solidarity, and actions.
To engage people in protecting and improving the water quality and natural systems of the Cannon River Watershed.
Promote corn and corn products and improve corn profitability. influence public policy and increase corn usage through livestock feeding and new domestic products.
Nextgen america empowers young people to engage in the democratic process through voter registration and civic engagement on issues of public policy. this is achieved through innovative digital outreach, communications, and grassroots…
Nuru is a global collective that enables inclusive and sustainable prosperity by identifying communities at the stability tipping point, strengthening rural livelihoods and market systems, and fostering stabilizing connections that repair…
To advance women's empowerment and gender equality to tackle climate change, food insecurity and poverty within enabling environments. WOCAN strengthens capacities of organizations and individuals for gender integration and leadership. It…
EcoAdapt, founded by a team of some of the earliest adaptation thinkers and practitioners in the field, has one goal - creating a robust future in the face of climate change. We bring together diverse players to reshape planning and…
Namati, inc. (namati) is dedicated to putting the law in people's hands. we strive to build a just world, in which every one of us can take part in the decisions and demand accountability from the institutions that affect our lives.…
To cultivate strong communities rooted in social and economic justice, environmental stewardship, and opportunity for all.
Coordinate programs to reduce domestic violence in native american communities
For reference, the grantee most central to the portfolio’s shape is Upstream Arts Inc and the most unlike its peers is The New Nature Foundation. Resemblance is measured on each organization’s own IRS 990 mission text; it reflects how work is described, not its quality or impact.
14 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. 14 of the 33 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 ACATE AMAZON CONSERVATION INC ↗
- Who funds The Land Institute ↗
- Who funds MINNESOTA FRINGE FESTIVAL ↗
- Who funds UPSTREAM ARTS INC ↗
- Who funds RAIN FOR THE SAHEL AND SAHARA INC ↗
- Who funds DAKOTA RESOURCE COUNCIL ↗
- Who funds The Puppeteers of America Inc ↗
- Who funds CLIMATE GENERATION ↗
- Who funds GIRLTREK INCORPORATED ↗
- Who funds ILLINOIS PEOPLES ACTION ↗
- Who funds THE NEW NATURE FOUNDATION ↗
- Who funds Dakota Rural Action ↗
- Who funds Violence Prevention Center ↗
- Who funds THE REDEMPTION PROJECT ↗
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: The Minneapolis Foundation · Rockefeller Philanthropy Advisors Inc · Mightycause Charitable Foundation · National Philanthropic Trust · Donor Advised Charitable Giving 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 The Irwin Andrew Porter Foundation 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 The Irwin Andrew Porter Foundation?
Find your warmest path to The Irwin Andrew Porter Foundation 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.