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· Private foundation

Sigmund and Ellen Tannenbaum Foundation Inc

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.

$4k
Granted FY2024still arriving
5
Grants FY2024still arriving
1
States reached
$1k
Largest
01What it funds
0199% classified

What it funded, over time

Every grant placed by its stated purpose and the recipient’s mission, by year, FY2017 to 2024.

Science & Tech$205kPhilanthropy$87kReligion$56kEducation$27kArts & Culture$26kHuman Services$26kHousing & Shelter$3kRecreation & Sports$2kOther$0
02FY2024 · 5 grants

Where the money goes

Grants by size, and the largest recipients.

$1,000
Median grant
1
States reached
$188k
Total assets
Largest grants
RecipientAmount
TEMPLE EMANUEL$1,100
ARTS GREENSBORO$1,000
COMMUNITY FOUNDATION OF GREATER GREENSBORO$1,000
GREENSBORO JEWISH FEDERATION$500
BETH DAVID SYNAGOGUE$200
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:

Its human-services grants (FY17–23, $7k) land where the poverty rate runs at 16%, against an area that typically sits at 12%. 100% of those dollars go to grantees based in above-average-need neighborhoods. Most of its grants land in higher-need ZIPs.

area typical 12%GREENSBORO URBAN MINISTRY: $1k → 16%GREENSBORO URBAN MINISTRY: $1k → 16%GREENSBORO URBAN MINISTRY: $1k → 16%GREENSBORO URBAN MINISTRY: $1k → 16%GREENSBORO URBAN MINISTRY: $1k → 16%GREENSBORO URBAN MINISTRY: $1k → 16%GREENSBORO URBAN MINISTRY: $1k → 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.

97%of every dollar goes to organizations it has funded before.
$338k · 14 repeat orgs$11k to everyone else

Grantees it renews have grown median revenue +38% since the first grant, against -8% for those funded once.

14 repeat relationships: 3 still active in FY2024, 11 since wound down.

How the two cohorts compare

Re-uppedFunded once

Organizations

14
7

Total granted

$338k
$11k

Median revenue growth · since first grant

+38%
-8%

Still filing today

71%
43%

New vs renewed · share of each year

In FY2024, 100% of grant dollars renewed an existing relationship; $0 went to new ones.

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

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

’17’18’19’20’21’22’23’24
Arts & CultureEducationHuman ServicesHealthCommunity ImprovementHousing & ShelterOther
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

  • TN
    THE NATURAL SCIENCE CENTER OF GREENSBORO INC DBA GREENSBORO SCIENCE CENTER
    6× · 2017–2023 · $205k · revenue +245%
  • BS
    B'NAI SHALOM SYNAGOGUE INC
    4× · 2020–2023 · $13k · revenue +69%
  • Elon University
    6× · 2017–2023 · $11k · revenue +43%

Funded once

  • TC
    THE COMMUNITY FOUNDATION STEVEN TANGER
    one grant, 2017 · $5k
  • GF
    GUILFORD FAMILY SERVICES OF GREENSBORO
    one grant, 2017 · $2k
  • HC
    Henderson County & Thermal Belt Habitat for Humanity
    one grant, 2017 · $2k · revenue -15%
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
Greensboro Historical Museum Inc

Together with its diverse communities, the organization collects objects and stories, connects generations, and challenges people to explore our city's past, present and future. the museum sparks wonder through bold exhibitions and…

Arts & Culture
2
Greater Greenville Association of Realtors Inc

Providing standards, guidelines, and procedures to those members engaged in practice of the real estate profession

—
3
Greensboro College

Greensboro College provides a liberal arts education grounded in the traditions of the United Methodist Church and fosters the intellectual, social, and spiritual development of all students while supporting their individual needs.

Education
4
Greater Winston-Salem Development Corp

To recruit new businesses to winston-salem and forsyth county in order to facilitate growth and economic diversification in the area.

Community Improvement
5
North Carolina Symphony Society Inc

To be north carolina's state orchestra, an orchestra achieving the highest level of artistic quality and performance standards, and embracing its dual legacies of statewide service and music education.

Arts & Culture
6
Green Hill Center for North Carolina Art

The mission of green hill center for nc art is to promote the visual arts of north carolina by engaging a broad community of artists, adults and children through dynamic exhibitions and educational programs while providing a platform for…

Arts & Culture
7
Greensboro Area Chamber of Commerce Inc

To serve as greensboro, north carolina's principal economic and community development organization. our goal is to strategically develop a vibrant community that creates, expands, and attracts business while advancing the quality of life…

—
8
Gaston Memorial Hospital Foundation Inc

To engage and inspire our community to support caromont health in providing compassionate, exceptional and highly reliable care.

Health
9
Greensboro Symphony Orchestra Inc

The mission of the greensboro symphony orchestra, inc. is to enrich the cultural life of greensboro, nc and surrounding areas through the development, production, and promotion of the highest quality music and music education programs.

Arts & Culture
10
North Carolina Symphony Foundation

To receive and hold the endowment of the north carolina symphony society, inc. (the "society"), solicit additions to the endowment, safeguard assets, and expend funds for the exclusive use and benefit of the society.

Arts & Culture
11
Goodwill Industries of Central North Car

Goodwill industries of central north carolina, inc.'s mission is improving lives and enriching communities through the power of work

Employment
12
North Greenville University

North greenville university exists to glorify god by cultivating graduates who are equipped to serve as transformational leaders for church and society.

Education
How this is measured
The grantee most central to the portfolio’s shape is Community Foundation of Greater Greensboro Inc; the most unlike its peers is Henderson County & Thermal Belt Habitat for Humanity. 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

15 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. 15 of the 23 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)
2
Early backer (in before they grew)
15/15
Grantees still filing
8/15
Grew since first funded

Where the money sits, by cause and then by grantee

THE NATURAL SCIENCE CENTER OF GREENSBORO INC DBA GREENSBORO SCIENCE CENTER: $205,000 · Arts & CultureTHE NATURAL SCIENCE CENTER OF GREENSBORO INC DBA GREENSBORO …EASTERN MUSIC FESTIVAL INC: $15,780 · Arts & CultureEASTERN MUSIC FESTIVAL INC+2 more: $9,900 · Arts & CultureBETH DAVID SYNAGOGUE: $26,688 · OtherBETH DAVID SYNAGOGUETEMPLE EMANUEL: $21,361 · OtherTEMPLE EMANUELFAMILY SERVICES OF PIEDMONT: $16,500 · OtherFAMILY SERVICES OF PIEDM…B'NAI SHALOM SYNAGOGUE INC: $12,500 · OtherB'NAI SHALOM SYNAGOGUE I…B'NAI SHALOM: $7,600 · OtherB'NAI SHALOMTHE COMMUNITY FOUNDATION STEVEN TANGER: $5,000 · Other+5 more: $5,100 · Other+5 moreGREENSBORO JEWISH FEDERATION: $51,100 · PhilanthropyGREENSBORO JEWISH FED…COMMUNITY FOUNDATION OF GREATER GREENSBORO INC: $31,000 · PhilanthropyCOMMUNITY FOUNDATION …Elon University: $11,000 · EducationDUKE UNIVERSITY: $2,000 · EducationGREENSBORO URBAN MINISTRY: $7,000 · Human ServicesGREENSBORO DOWNTOWN PARKS INC: $1,500 · Community ImprovementHABITAT FOR HUMANITY OF GREATER GREENSBORO INC: $1,100 · Housing & ShelterAUTHORACARE FOUNDATION: $500 · Health
Arts & Culture$230,680Other$94,749Philanthropy$82,100Education$13,000Human Services$7,000Community Improvement$1,500Housing & Shelter$1,100Health$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 NATURAL SCIENCE CENTER OF GREENSBORO INC DBA GREENSBORO SCIENCE CENTER: $205,000 over 6y, 0.7% of budgetGREENSBORO JEWISH FEDERATION: $51,100 over 8y, 0.3% of budgetCOMMUNITY FOUNDATION OF GREATER GREENSBORO INC: $31,000 over 7y, 0.0% of budgetEASTERN MUSIC FESTIVAL INC: $15,780 over 7y, 0.1% of budgetB'NAI SHALOM SYNAGOGUE INC: $12,500 over 4y, 0.1% of budgetElon University: $11,000 over 6y, 0.0% of budgetUNITED ARTS COUNCIL OF GREENSBORO INC: $7,000 over 6y, 0.1% of budgetGREENSBORO URBAN MINISTRY: $7,000 over 7y, 0.0% of budgetPreservation Greensboro Inc: $2,900 over 5y, 0.2% of budgetDUKE UNIVERSITY: $2,000 over 2y, 0.0% of budgetHenderson County & Thermal Belt Habitat for Humanity: $1,500 over 1y, 0.0% of budgetGREENSBORO DOWNTOWN PARKS INC: $1,500 over 2y, 0.1% of budgetHABITAT FOR HUMANITY OF GREATER GREENSBORO INC: $1,100 over 2y, 0.0% of budgetAUTHORACARE FOUNDATION: $500 over 1y, 0.0% of budgetALS UNITED GREATER NEW YORK INC: $100 over 1y, 0.0% 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 NATURAL SCIENCE CENTER OF GREENSBORO INC DBA GREENSBORO SCIENCE CENTER ↗
  • Who funds GREENSBORO JEWISH FEDERATION ↗
  • Who funds COMMUNITY FOUNDATION OF GREATER GREENSBORO INC ↗
  • Who funds EASTERN MUSIC FESTIVAL INC ↗
  • Who funds B'NAI SHALOM SYNAGOGUE INC ↗
  • Who funds Elon University ↗
  • Who funds UNITED ARTS COUNCIL OF GREENSBORO INC ↗
  • Who funds GREENSBORO URBAN MINISTRY ↗
  • Who funds Preservation Greensboro Inc ↗
  • Who funds DUKE UNIVERSITY ↗
  • Who funds Henderson County & Thermal Belt Habitat for Humanity ↗
  • Who funds GREENSBORO DOWNTOWN PARKS INC ↗
  • Who funds HABITAT FOR HUMANITY OF GREATER GREENSBORO INC ↗
  • Who funds AUTHORACARE FOUNDATION ↗
  • Who funds ALS UNITED GREATER NEW YORK INC ↗

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.

Well-Spring Retirement Community IncNC20× affinity7 shared granteesties to 11 of 11Hover any node to trace its alignments.Compare side by side →

Open a dossier: Well-Spring Retirement Community Inc · Lincoln Financial Foundation Inc · The Cemala Foundation Inc · Tannenbaum-Sternberger Foundation Inc · The Seymour & Carol Levin Foundation · The Ackermann Foundation · The Anonymous Fund · William a Stern Foundation · Hagan Family Fund · Moses H Cone Memorial Hospital Operating Corporation · The Robinson Foundation Inc · The Allendale Fund

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 Sigmund and Ellen Tannenbaum Foundation Inc funds: left to right is the share of its income from government, bottom to top the share from Sigmund and Ellen Tannenbaum Foundation Inc. Bigger dots raise more.

2024
’20’21’22’23’24’25
no gov · 00%0%1%3%5%funder's share of their income ↑0%8%15%22%30%share of the org’s income from government →
    no gov moneyreceives it· size = income
    0get no government money at all
    9report government grants on their 990 we could not trace to a source (not plotted)
    0rely on government for over half their income
    ⤢ axis zoomed · 0–30%
    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.

    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 23 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 2024, released 2024. Filings run roughly 12 to 24 months behind; figures are dated accordingly.

    Possibly out of date. A more recent filing (FY2025) is on record and reports no grant expense, so the figures above are from FY2024, the most recent year this funder made grants.

    Source object · view filing

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