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NTEE major group Z

Unknown Nonprofits

Givalgo Discover indexes 50 active US unknown organisations recognised by the IRS as tax-exempt under section 501(c). The list below shows the largest by reported revenue on each org's most recent Form 990 filing. Click any row for the full Due Diligence profile — IRS status, Form 990 financials, governance flags, peer benchmarks, and auto-revocation history.

Top 50 by reported revenue

From the most recent Form 990 indexed for each organisation. Click an org for full diligence detail.

#OrganisationLocationRevenue
1MERCY CARE
EIN 86-0527381
PHOENIX, AZ$4.9B
2MERCY CLINIC EAST COMMUNITIES
EIN 43-1771217
CHESTERFIELD, MO$804.6M
3CALSTART INC
EIN 95-4375022
PASADENA, CA$489.7M
4ARAB FUND FOR ECONOMIC AND SOCIAL DEVELOPMENT
EIN 98-0211642
KUWAIT$420.4M
5SRC INC
EIN 15-0589832
N SYRACUSE, NY$342.5M
6COMMUNITY HOWARD REGIONAL HEALTH INC
EIN 35-1865344
KOKOMO, IN$237.5M
7EMORY & CHILDRENS PEDIATRIC INSTITUTE INC
EIN 58-1692698
ATLANTA, GA$197.1M
8PROVIDENCE MEDICAL INSTITUTE
EIN 33-0283773
RENTON, WA$182.6M
9CITY YEAR INC
EIN 22-2882549
BOSTON, MA$173.1M
10CREDIT UNIONS IN THE STATE OF WASHINGTON
EIN 91-1792217
RICHLAND, WA$171.2M
11DANA-FARBER INC
EIN 04-3102433
BOSTON, MA$156.4M
12ARCTIC SLOPE NATIVE ASSOCIATION LTD
EIN 91-0873623
BARROW, AK$138.3M
13TERROS INC
EIN 86-0252067
PHOENIX, AZ$127.9M
14COMPASS HEALTH
EIN 91-1180810
EVERETT, WA$117.4M
15COMMUNITY RESEARCH FOUNDATION INC
EIN 95-3248148
SAN DIEGO, CA$116.2M
16TURNING POINT USA INC
EIN 80-0835023
INDIANAPOLIS, IN$115.5M
17NEW YORK STATE TECHNOLOGY ENTERPRISE CORPORATION
EIN 16-1521105
ROME, NY$114.9M
18LOW INCOME HOUSING INSTITUTE
EIN 94-3155150
SEATTLE, WA$108.6M
19SHARE OUR STRENGTH
EIN 52-1367538
WASHINGTON, DC$89.9M
20INDEPENDENT ORDER OF ODD FELLOWS
EIN 94-1251113
SARATOGA, CA$88.8M
21LAKE COUNTY TRIBAL HEALTH CONSORTIUM INC
EIN 94-2847137
LAKEPORT, CA$85.1M
22BABY2BABY
EIN 46-4503539
LOS ANGELES, CA$77.7M
23COMUNILIFE INC
EIN 13-3530299
NEW YORK, NY$77.5M
24AUGUSTANA CARE
EIN 41-1728753
EDINA, MN$75.3M
25WILDWOOD PROGRAMS INC
EIN 22-2132752
LATHAM, NY$72.9M
26GALLO EMPLOYEE BENEFIT TRUST
EIN 94-2334925
MODESTO, CA$70.0M
27FISHER HOUSE FOUNDATION INC
EIN 11-3158401
ROCKVILLE, MD$70.0M
28HAMASKPIK OF ROCKLAND COUNTY INC
EIN 13-3978518
MONSEY, NY$67.9M
29NATIONAL ASSOCIATION OF COUNTY AND CITY HEALTH OFFICIALS
EIN 52-1426663
WASHINGTON, DC$62.3M
30ARIZONA BEHAVIORAL HEALTH CORPORATION
EIN 86-0888064
PHOENIX, AZ$62.0M
31MORTGAGE BANKERS ASSOCIATION OF AMERICA
EIN 36-1505650
WASHINGTON, DC$61.8M
32DAVE THOMAS FOUNDATION FOR ADOPTION
EIN 31-1356151
DUBLIN, OH$61.6M
33CENTRAL CITY COMMUNITY HEALTH CENTER INC
EIN 95-4492570
MONTEREY PARK, CA$60.3M
34CHILDRENS MIRACLE NETWORK
EIN 87-0387205
SALT LAKE CTY, UT$59.7M
35JAEB CENTER FOR HEALTH RESEARCH INC
EIN 59-3187624
TAMPA, FL$58.7M
36AMERICAN INDEPENDENT FOUNDATION
EIN 33-1137541
WASHINGTON, DC$58.6M
37TACO BELL FOUNDATION INC
EIN 33-0523542
IRVINE, CA$56.3M
38UNIDOSUS
EIN 86-0212873
WASHINGTON, DC$53.5M
39BRONSON SOUTH HAVEN HOSPITAL
EIN 38-1676780
KALAMAZOO, MI$47.9M
40CHILD AND FAMILY SERVICE
EIN 99-0073483
EWA BEACH, HI$41.0M
41IOWA DONOR NETWORK
EIN 42-1414092
NORTH LIBERTY, IA$40.5M
42INDEPENDENT OPPORTUNITIES INC OF OKLAHOMA
EIN 74-2547238
TULSA, OK$39.7M
43SOUTH COAST CHILDRENS SOCIETY INC
EIN 33-0521169
MISSION VIEJO, CA$39.3M
44JULIA DYCKMAN ANDRUS MEMORIAL INC
EIN 13-2793295
YONKERS, NY$38.7M
45NEXTGEN CLIMATE ACTION
EIN 46-1957345
SAN FRANCISCO, CA$38.5M
46BIOVERSITY INTERNATIONAL
EIN 98-0142916
ITALY$38.2M
47CONTAINER ROYALTIES SUPPLEMENTAL
EIN 57-0551096
CHARLESTON, SC$38.2M
48NEW AMERICA FOUNDATION
EIN 52-2096845
WASHINGTON, DC$37.2M
49WELLPOINT CARE NETWORK INC
EIN 39-1338354
MILWAUKEE, WI$37.2M
50SELF ENHANCEMENT INC
EIN 93-1086629
PORTLAND, OR$36.3M

By state

7,873 organisations across 51 categories.

  1. 1,405
    17.8%
  2. 546
    6.9%
  3. 530
    6.7%
  4. 423
    5.4%
  5. 388
    4.9%
  6. 321
    4.1%
  7. 226
    2.9%
  8. 220
    2.8%
  9. 206
    2.6%
  10. 195
    2.5%
  11. 185
    2.3%
  12. 183
    2.3%

A representative cross-section beyond the revenue ranking — from national institutions to small community groups and private foundations — chosen for complete, recent IRS filings.

Frequently asked questions about Unknown nonprofits

Answers compiled from the IRS Form 990, BMF, Pub 78, and Auto-Revocation List.

What counts as a Unknown nonprofit?
Unknown nonprofits are US tax-exempt organisations classified under the IRS National Taxonomy of Exempt Entities (NTEE) major group "Z" (Unknown). The IRS assigns the NTEE code based on the organisation's primary purpose as reported on Form 990.
How are unknown nonprofits regulated?
Unknown nonprofits with annual gross receipts of $50,000 or more must file Form 990 (or 990-EZ) annually with the IRS. Smaller orgs file the 990-N e-Postcard. Failure to file for three consecutive years triggers automatic revocation of tax-exempt status.
How can I verify a unknown nonprofit's tax-exempt status before granting?
Cross-reference the organisation against the IRS Auto-Revocation List AND IRS Publication 78. Pub 78 confirms whether donations are tax-deductible; the Auto-Revocation List confirms whether the org has lost its status for non-filing. Givalgo Discover surfaces both signals on every org profile.
Where can I find Form 990 data for unknown nonprofits?
Each organisation's Form 990 — including financials, governance, programs, and grants — is publicly available from the IRS. Givalgo Discover aggregates the full corpus (Form 990, 990-EZ, 990-PF, 990-N) and provides a free profile for every IRS-registered unknown nonprofit.
What's the difference between a 501(c)(3), 501(c)(4), and 501(c)(6)?
501(c)(3) is the standard tax-exempt classification for public charities and private foundations; contributions are tax-deductible. 501(c)(4) covers civic-league / social-welfare orgs; contributions are not deductible. 501(c)(6) covers business leagues and chambers of commerce. The IRS subsection code on each Givalgo Discover profile identifies the exact classification.