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Macklanburg Foundation at a glance

· Private foundation

Macklanburg 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.

$302k
Granted FY2025still arriving
29
Grants FY2025still arriving
2
States reached
$100k
Largest
01What it fundsRead
02The needRead
03Its granteesRead
04Its fieldRead
05Through PlinthRead
01What it funds
0183% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2025.

Environment$391kArts & Culture$302kFood & Nutrition$201kReligion$156kPublic Safety & Disaster$58kRecreation & Sports$55kHealth$48kEmployment$25kOther$0
02FY2025 · 29 grants

Where the money goes

Grants by size, and the largest recipients.

By grant size · FY2025

  • Under $10k19 grants · $75k
  • $10k–50k9 grants · $127k
  • $50k–250k1 grant · $100k
$5,000
Median grant
2
States reached
$2.2M
Total assets
Largest grants
RecipientAmount
NATURE CONSERVANCY$100,000
REGIONAL FOOD BANK OF OKLAHOMA$25,000
OKLAHOMA STATE PARKS FOUNDATION$20,000
BOSTON AVE UNITED METHODIST CHURCH$15,000
THOMAS GILCREASE INSTITUTTE OF AMER$15,000
TULSA LITERARY COALITION$12,000
Individual grant recipient$10,000
OKLAHOMA ART INSTITUTE QUARTZ MOUNT$10,000
OKLAHOMA HUMANITIES COUNCIL$10,000
RED CROSS OKLAHOMA COUNTY CHAPTER$10,000
WESLEY METHODIST CHURCH$8,000
ROTARY CLUB OF GROVE OKLAHOMA$5,000
LINDENWOOD GARDENS$5,000
TEEM OF OKLAHOMA CITY$5,000
THE SPERO PROJECT$5,000
02The need
03

Does the money reach high-need areas?

Each grant placed by the hardship in its grantee’s ZIP, against the area’s typical level.

show:

Dollar for dollar, its grants (FY17–25) land where the poverty rate runs at 16%, against an area that typically sits at 13%. 100% of its dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 13%NATURE CONSERVANCY: $100k → 15%WESLEY METHODIST CHURCH: $8k → 16%FIRST METHODIST CHURCH: $8k → 20%GILCREASE MUSEAUM: $10k → 14%NATURE CONSERVANCY: $50k → 15%WESLEY METHODIST CHURCH: $8k → 16%GILCREASE MUSEAUM: $10k → 14%NATURE CONSERVANCY: $50k → 15%WESLEY METHODIST CHURCH: $8k → 16%GILCREASE MUSEAUM: $10k → 14%NATURE CONSERVANCY: $35k → 15%NATURE CONSERVANCY: $30k → 15%NATURE CONSERVANCY: $30k → 15%NATURE CONSERVANCY: $30k → 15%NATURE CONSERVANCY: $25k → 15%NATURE CONSERVANCY: $20k → 15%OKLAHOMA HUMANITIES COUNCIL: $19k → 16%OKLAHOMA HUMANITIES COUNCIL: $10k → 16%QUARTZ MOUNTAIN: $10k → 16%OKLAHOMA HUMANITIES COUNCIL: $10k → 16%QUARTZ MOUNTAIN: $10k → 16%OKLAHOMA ART INSTITUTE QUARTZ MOUNT: $10k → 16%QUARTZ MOUNTAIN: $10k → 16%QUARTZ MOUNTAIN: $10k → 16%OKLAHOMA HUMANITIES COUNCIL: $10k → 16%OKLAHOMA HUMANITIES COUNCIL: $10k → 16%TULSA LITERARY COALITION: $12k → 15%TULSA LITERARY COALITION: $10k → 15%TULSA LITERARY COALITION: $10k → 15%TULSA LITERARY COALITION: $10k → 15%MAGIC CITY BOOKS: $10k → 15%THOMAS GILCREASE INSTITUTTE OF AMER: $15k → 15%THOMAS GILCREASE INSTITUTTE OF AMER: $10k → 15%BOSTON AVE UNITED METHODIST CHURCH: $15k → 15%BOSTON AVE METHODIST CHURCH FOR SIS: $13k → 15%RED CROSS OKLAHOMA COUNTY CHAPTER: $10k → 16%SISTEMA TULSA: $13k → 15%RED CROSS OKLAHOMA COUNTY CHAPTER: $10k → 16%SISTEMA TULSA: $13k → 15%RED CROSS OKLAHOMA COUNTY CHAPTER: $9k → 16%SISTEMA TULSA: $13k → 15%RED CROSS OKLAHOMA COUNTY CHAPTER: $9k → 16%SISTEMA TULSA: $10k → 15%SISTEMA TULSA: $10k → 15%BOSTON AVE UNITED METHODIST CHURCH: $10k → 15%OKLAHOMA EDUCATIONAL TELEVISION ASS: $20k → 16%OKLAHOMA EDUCATIONAL TELEVISION ASS: $20k → 16%FRIENDS OF THE OKLAHOMA HISTORICAL: $10k → 16%0%20%40%50%more need →
grant to an above-average-need area below average· circle size = grant amount
How this is measured
Matched: human-services grants are those whose grantee’s IRS cause code is Human Services. Placed by people below the poverty line in the grantee’s ZIP, averaged from the tracts in that ZIP.
How this is measured
US grants placed by each grantee’s ZIP, which can differ from where services are delivered. Need from public data (U.S. Census/ACS, CDC PLACES, Eviction Lab, USDA), shown as context about the area, never attributed to the funder’s giving.
03Its grantees
repeat funding

Who it funds again

Organizations funded in more than one year, against those funded once.

96%of every dollar goes to organizations it has funded before.
$1.1M · 34 repeat orgs$46k to everyone else

34 repeat relationships: 25 still active in FY2025, 9 since wound down; 3 grantees were first funded in FY2025 (too recent to call).

How the two cohorts compare

Re-uppedFunded once

Organizations

34
7

Total granted

$1.1M
$31k

Median revenue growth · since first grant

+47%
+118%

Still filing today

24%
14%

New vs renewed · share of each year

In FY2025, 93% of grant dollars renewed an existing relationship; $15k 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
Arts & CultureFood & NutritionEducationRecreation & SportsEmploymentEnvironmentOther
How this is measured
First-time means a grantee’s first year in the filing window; renewed means funded in an earlier year too. The renewed share climbs naturally as a portfolio matures, so the signal is a year that bucks it (a wave of new grantees). 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

  • REGIONAL FOOD BANK OF OKLAHOMA INC
    9× · 2017–2025 · $165k · revenue +47%
  • OH
    Oklahoma Humanities Council Inc
    9× · 2017–2025 · $79k · revenue +10%
  • TL
    Tulsa Literary Coalition Inc
    6× · 2019–2025 · $54k · revenue +740%

Funded once

  • FO
    Friends of the Oklahoma History Centergraduated
    one grant, 2017 · $10k · revenue +118%
  • IG
    Individual grant recipient
    one grant, 2021 · $10k
  • T
    TEEM
    one grant, 2019 · $5k
How this is measured

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

04Its field

Closest unfunded matches

The nonprofits that most resemble its grantees but are not funded by it, scored along the direction from the rest of the field toward the portfolio. A resemblance in what they say they do, not a recommendation.

1
Oklahoma Newspaper Foundation
Arts & Culture
2
Oklahoma State Chamber of Commerce and Industry Inc

The State Chamber is a statewide membership organization. Our purpose is to be the unified voice of business and the most effective advocacy organization at the State Capitol.

—
3
Oklahoma City Beautiful Inc

OKC Beautiful's mission is to lead beautification and environmental stewardship through collaboration, education and advocacy. We have been doing this for over 50 years through volunteers and contributing donors. This directly impacts the…

Environment
4
Diversity Center of Oklahoma Inc
Health
5
Oklahoma Literacy Coalition Inc

Supports Literacy Efforts Statewide by providing continuing education for literacy providers, grants to literacy organizations, and literacy awareness to government and media.

—
6
Oklahoma Council of Public Affairs Inc

To promote the flourishing of the people of oklahoma by advancing principles and policies that support free enterprise, limited government, personal responsibility, and individual initiative.

Public Safety & Disaster
7
Oklahoma Academy for State Goals

To provide information to citizens. The organization encourages the utilization and developement of the State of Oklahomas resourses.

—
8
The Verge Entrepreneurship Hub Foundation
Community Improvement
9
Oklahoma Contemporary Arts Center Inc

Oklahoma contemporary arts center encourages artistic expression in all its forms through education,exhibitions, and performance.

Arts & Culture
10
Conservation Coalition of Oklahoma

The Conservation Coalition of Oklahoma CCO is a nonpartisan 501c4 organization representing common-sense conservation policy in Oklahoma. Partnering with its 501c3 members, CCO advocates for science-based legislation protecting water,…

Environment
11
Oklahoma Media Center Inc

The goal of the oklahoma media center is to support and strengthen oklahoma's local journalism ecosystem and spur innovation through statewide collaboration that benefits diverse audiences and educate/informs the public on important…

Arts & Culture
12
Preservation Oklahoma Inc

To preserve the places where Oklahoma history lives.

—
How this is measured
The grantee most central to the portfolio’s shape is A Chance to Change Foundation; the most unlike its peers is The Nature Conservancy. 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 grant beside the grantee’s revenue from every source, year by year.

How this is measured

Counted here: distinct organizations funded across 2017 to 2025, not grant rows in a single year, so this will not match the grant count on the cover. 11 of the 45 grantees resolved in that span have returns of their own we could reconcile.

Each grantee is resolved to its own IRS returns. Association, dated; never a causal claim.

0
Load-bearing (≥25% of a budget)
4
Early backer (in before they grew)
11/11
Grantees still filing
10/11
Grew since first funded

Where the money sits, by cause and then by grantee

THE NATURE CONSERVANCY: $370,000 · OtherTHE NATURE CONSERVANCYIndividual grant recipient: $88,500 · OtherIndividual grant recipientWESLEY METHODIST CHURCH: $72,000 · OtherWESLEY METHODIST CHURCHIndividual grant recipient: $59,000 · OtherRED CROSS OKLAHOMA COUNTY CHAPTER: $58,000 · OtherA CHANCE TO CHANGE FOUNDATION: $47,500 · OtherOKLAHOMA EDUCATIONAL TELEVISION ASS: $45,000 · OtherTEEM OF OKLAHOMA CITY: $42,500 · OtherIndividual grant recipient: $40,000 · Other+28 more: $327,500 · Other+28 moreREGIONAL FOOD BANK OF OKLAHOMA INC: $165,000 · Food & NutritionREGIONAL FOO…Oklahoma Humanities Council Inc: $79,000 · Arts & CultureOKLAHOMA WATCH INC: $10,500 · Arts & CultureFriends of the Oklahoma History Center: $10,000 · Arts & CultureTulsa Literary Coalition Inc: $54,000 · EducationSPECIAL OLYMPICS INC: $25,000 · Recreation & SportsTHE SPERO PROJECT INC: $25,000 · EmploymentTulsa Garden Center: $3,500 · Environment
Other$1,150,000Food & Nutrition$165,000Arts & Culture$99,500Education$54,000Recreation & Sports$25,000Employment$25,000Environment$3,500

Each grantee by its size and the funder’s share of it; top left is load-bearing

25%50%75%100%$1.0M$10M$100Mgrantee revenue →↑ funder's share of their budgetTHE NATURE CONSERVANCY: $370,000 over 9y, 0.0% of budgetREGIONAL FOOD BANK OF OKLAHOMA INC: $165,000 over 9y, 0.0% of budgetOklahoma Humanities Council Inc: $79,000 over 9y, 1.3% of budgetTulsa Literary Coalition Inc: $54,000 over 6y, 6.1% of budgetA CHANCE TO CHANGE FOUNDATION: $47,500 over 8y, 0.4% of budgetSPECIAL OLYMPICS INC: $25,000 over 5y, 0.0% of budgetTHE SPERO PROJECT INC: $25,000 over 5y, 0.2% of budgetOKLAHOMA WATCH INC: $10,500 over 6y, 0.2% of budgetFriends of the Oklahoma History Center: $10,000 over 1y, 3.2% of budgetSIXTWELVE INC: $7,500 over 7y, 1.9% of budget
Grantee by grantee: a decade per organization, before and after funding

A decade per grantee: revenue shaded, grants as bars, all rows on one timeline.

  • Who funds THE NATURE CONSERVANCY ↗
  • Who funds REGIONAL FOOD BANK OF OKLAHOMA INC ↗
  • Who funds Oklahoma Humanities Council Inc ↗
  • Who funds Tulsa Literary Coalition Inc ↗
  • Who funds A CHANCE TO CHANGE FOUNDATION ↗
  • Who funds SPECIAL OLYMPICS INC ↗
  • Who funds THE SPERO PROJECT INC ↗
  • Who funds OKLAHOMA WATCH INC ↗
  • Who funds Friends of the Oklahoma History Center ↗
  • Who funds SIXTWELVE INC ↗
  • Who funds Tulsa Garden Center ↗

Co-funders

Grantmakers whose grantees overlap with this funder’s far more than size alone predicts. Closer means stronger alignment; arcs show where they also fund each other. Here they form a tightly interlocked group: most of these funders back each other's grantees too.

Kirkpatrick Family Af…Inasmuch FoundationThe Anne and Henry Za…Oklahoma City Communi…Tulsa Community Found…Natl Christian Charit…Amazonsmile Foundation
Kirkpatrick Family Affiliated Fund of Occf IncOK15.7× affinity5 shared granteesties to 6 of 6Hover any node to trace its alignments.Compare side by side →

Open a dossier: Kirkpatrick Family Affiliated Fund of Occf Inc · Inasmuch Foundation · The Anne and Henry Zarrow Foundation · Oklahoma City Community Foundation Inc · Tulsa Community Foundation · Natl Christian Charitable Fdn Inc · Amazonsmile Foundation

How this is measured
Affinity is a Gamma-Poisson posterior co-funding rate, re-centered on the typical rate, so thin evidence shrinks toward no signal. Overlap is association, not proof of shared intent.

How much its grantees rely on government

Each dot is one organization Macklanburg Foundation funds: left to right is the share of its income from government, bottom to top the share from Macklanburg Foundation. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 50%0%1%3%5%funder's share of their income ↑0%25%50%75%100%share of the org’s income from government →median 91%
  • Oklahoma Humanities Council Inc: 91% of income from government
no gov moneyreceives it· size = income
5get no government money at all
3report government grants on their 990 we could not trace to a source (not plotted)
1rely on government for over half their income
typical government reliance, FY20–25
How this is measured
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 a grant caused the public funding. Coverage is precision-first, a floor rather than 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 to 24 months.
05Through Plinth

Warm introductions · Powered by PlinthPlus

How do I get to Macklanburg Foundation?

Find your warmest path to Macklanburg 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.

On method. Every financial figure here is read from IRS e-file XML, the funder’s own 990/990-PF, and from the multi-year returns of the 45 grantees we resolved, each linked to its source. Grantee outcomes are each organization’s own program-service reporting (Form 990, Part III), read as association with funding, never as caused by it. Low-confidence name matches are suppressed rather than guessed. How we build these →

How this is measured
Each figure carries one of six labels. Filed is what the funder reported on its 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.

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

Source object · view filing

Play a game based on Macklanburg’s filings →

More from the funding graph

The unnamed billions
grants reported with no recipient in the public record
The regranting layer
51% of grant dollars land in the regranting layer
The DAF merry-go-round
$9.7B circulates between donor-advised funds
The endowment market
who holds foundation money, and what just moved
The camps
funders cluster by geography, not ideology
By state
where grant money is based, and what stays home