SUNDHEIM FAMILY FOUNDATION

Cite this

Plain text SUNDHEIM FAMILY FOUNDATION. furp.org, nonprofit organization profile, tax years 2019–2025. https://furp.org/org/sundheim-family-foundation-831563495. Retrieved 2026-10-28.

APA furp.org. (n.d.). SUNDHEIM FAMILY FOUNDATION [Nonprofit organization profile; tax years 2019–2025]. Retrieved October 28, 2026, from https://furp.org/org/sundheim-family-foundation-831563495

MLA “SUNDHEIM FAMILY FOUNDATION.” furp.org, tax years 2019–2025, https://furp.org/org/sundheim-family-foundation-831563495. Accessed 28 Oct. 2026.

Retrieved 2026-10-28; covers tax years 2019–2025. Data: furp.org, CC BY 4.0.

2025 · Form 990PF · revenue $19.1M · expenses $7.9M · assets $111.9M

EIN
83-1563495
Address
C/O SUNNY CAP MGMT 9 W 57TH ST, NEW YORK, NY 10019-0000
NTEE code
T20
Exempt type
501(c)(3): charitable, religious, educational, scientific or literary (corporation)
Ruling date
May 2020 (when the IRS recognized its exemption)
IRS status
Exempt (unconditional) (IRS Business Master File) IRS data ↗
Tax-deductible donations
Yes: listed in IRS Publication 78 (private foundation) Pub 78 ↗
Foundation status
Private non-operating foundation
Cross-check
ProPublica Nonprofit Explorer

Each tax year counts once: when a return was amended, only the latest return for that period is used below (superseded returns stay listed, greyed, under Finances).

People paid by the organization

None of the 3 people listed on these returns reported compensation from the organization. They are listed below.

Officers and directors, no compensation reported

3 people listed on the returns with $0 (or no amount) in every compensation column: current people first. Hours are as filed on the latest return each person appears on.

NameLatest titleYearsHrs/wk (latest)CompensationOrganizations
Daniel Sundheim PRESIDENT2019-2025 1 $0 reported 1
Brett Sundheim SECRETARY2019-2025 1 $0 reported 1
Mark Halpern TREASURER2019-2025 1 $0 reported 1

People by year

2025 · 3 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
DANIEL SUNDHEIM PRESIDENT1 $0-$0 $01
BRETT SUNDHEIM SECRETARY1 $0-$0 $01
MARK HALPERN TREASURER1 $0-$0 $01
2024 · 3 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
DANIEL SUNDHEIM PRESIDENT1 $0-$0 $01
BRETT SUNDHEIM SECRETARY1 $0-$0 $01
MARK HALPERN TREASURER1 $0-$0 $01
2023 · 3 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
DANIEL SUNDHEIM PRESIDENT1 $0-$0 $01
BRETT SUNDHEIM SECRETARY1 $0-$0 $01
MARK HALPERN TREASURER1 $0-$0 $01
2022 · 3 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
DANIEL SUNDHEIM PRESIDENT1 $0-$0 $01
BRETT SUNDHEIM SECRETARY1 $0-$0 $01
MARK HALPERN TREASURER1 $0-$0 $01
2021 · 3 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
DANIEL SUNDHEIM PRESIDENT1 $0-$0 $01
BRETT SUNDHEIM SECRETARY1 $0-$0 $01
MARK HALPERN TREASURER1 $0-$0 $01
2020 · 3 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
DANIEL SUNDHEIM PRESIDENT0 $0-$0 $01
BRETT SUNDHEIM SECRETARY0 $0-$0 $01
MARK HALPERN TREASURER0 $0-$0 $01
2019 · 3 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
DANIEL SUNDHEIM PRESIDENT0 $0-$0 $01
BRETT SUNDHEIM SECRETARY0 $0-$0 $01
MARK HALPERN TREASURER0 $0-$0 $01

Highest-paid independent contractors

2025 · 1 contractor · $240K
NameLocationServicePaid
Sunny Capital Management LLCNEW YORK, NYINVEST MANAGEMENT$240,000
2024 · 1 contractor · $260K
NameLocationServicePaid
Sunny Capital Management LLCNEW YORK, NYINVEST MANAGEMENT$260,000
2023 · 1 contractor · $220K
NameLocationServicePaid
Sunny Capital Management LLCNEW YORK, NYINVEST MANAGEMENT$220,000
2022 · 1 contractor · $240K
NameLocationServicePaid
Sunny Capital Management LLCNEW YORK, NYINVEST MANAGEMENT$240,000

Who the money went to

Grants this organization reported paying: Schedule I Part II of the Form 990, or the grants-paid list on the 990-PF. Open a year for every recipient. Recipients link to their own page when the grant names an EIN we have (990-PF grants list no EIN, so those link only on an exact, unique name and state). Grants to individuals are counted; their names are not shown.

2025 · 1 grant to organizations · $7.3M
2024 · 1 grant to organizations · $5.1M
2023 · 2 grants to organizations · $9.0M
2022 · 1 grant to organizations · $5.9M
2021 · 1 grant to organizations · $3.2M
2020 · 1 grant to organizations · $4.0M
2019 · 1 grant to organizations · $3.5M

Negative amounts are returned or refunded grants; they are listed last and left out of the totals of grants paid.

Who gave

Contributors listed on Schedule B of the Form 990-PF: name, city and state as filed (street addresses are not shown), with total and noncash contributions for the year. A link to an organization's page is tagged Fuzzy with its name-similarity score (0 to 1) when it rests on name and state; Schedule B lists no EIN, so no link here is an exact identifier match.

2025 · 4 contributors · $15.4M
#ContributorTypeCity, stateTotalNoncashSource
2 DANIEL SUNDHEIM 2020 CLAT Person NEW YORK, NY $6,815,512- Form 990PF Sch. B, 2025 · filing
3 DANIEL SUNDHEIM Person NEW YORK, NY $4,750,000- Form 990PF Sch. B, 2025 · filing
1 Sunny Ventures LLC Person NEW YORK, NY $3,439,493$3,439,493 Form 990PF Sch. B, 2025 · filing
4 DANIEL SUNDHEIM Person NEW YORK, NY $393,267$393,267 Form 990PF Sch. B, 2025 · filing
2024 · 2 contributors · $25.8M
#ContributorTypeCity, stateTotalNoncashSource
1 Sunny Ventures LLC Person NEW YORK, NY $20,132,876$20,132,876 Form 990PF Sch. B, 2024 · filing
2 DANIEL SUNDHEIM 2020 CLAT Person NEW YORK, NY $5,679,590- Form 990PF Sch. B, 2024 · filing
2023 · 3 contributors · $10.7M
#ContributorTypeCity, stateTotalNoncashSource
1 DANIEL SUNDHEIM 2020 CLAT Person NEW YORK, NY $4,732,992- Form 990PF Sch. B, 2023 · filing
2 DANIEL SUNDHEIM Person NEW YORK, NY $4,075,000- Form 990PF Sch. B, 2023 · filing
3 Sunny Ventures LLC Person NEW YORK, NY $1,913,525$1,913,525 Form 990PF Sch. B, 2023 · filing
2022 · 3 contributors · $10.0M
#ContributorTypeCity, stateTotalNoncashSource
3 Sunny Ventures LLC Person NEW YORK, NY $4,634,805$1,330,132 Form 990PF Sch. B, 2022 · filing
1 DANIEL SUNDHEIM 2020 CLAT Person NEW YORK, NY $3,944,160- Form 990PF Sch. B, 2022 · filing
2 DANIEL SUNDHEIM Person NEW YORK, NY $1,412,829$4,708,959 Form 990PF Sch. B, 2022 · filing
2021 · 2 contributors · $40.2M
#ContributorTypeCity, stateTotalNoncashSource
2 DANIEL SUNDHEIM Person NEW YORK, NY $36,878,078$36,878,079 Form 990PF Sch. B, 2021 · filing
1 DANIEL SUNDHEIM 2020 CLAT Person NEW YORK, NY $3,286,800- Form 990PF Sch. B, 2021 · filing

Contributors listed here are as reported on the filing. Unusual is not the same as improper. Many of these patterns have ordinary explanations. Check the filing.

Finances

Newest first. Each filing: its name on one row, its figures on the row beneath. Greyed filings are superseded by a later return for the same period and are left out everywhere else on this page.

RevenueExpensesAssetsNet assetsContributionsProgram revenueOfficer payEmployeesVolunteers
2025 · Form 990PF period ending 2025-12-31 · view filing · original 990 ↗
$19,119,661$7,902,428 $111,915,423$111,915,423 $15,398,272- $0--
2024 · Form 990PF period ending 2024-12-31 · view filing · original 990 ↗
$45,849,834$5,351,269 $104,214,272$104,214,272 $25,812,466- $0--
2023 · Form 990PF period ending 2023-12-31 · view filing · original 990 ↗
$11,688,909$9,228,048 $83,123,072$83,123,072 $10,721,517- $0--
2022 · Form 990PF period ending 2022-12-31 · view filing · original 990 ↗
$13,940,126$6,671,509 $80,664,197$80,664,197 $9,991,794- $0--
2021 · Form 990PF period ending 2021-12-31 · view filing · original 990 ↗
$75,541,519$3,472,825 $78,692,229$78,692,229 $40,164,878- $0--
2020 · Form 990PF period ending 2020-12-31 · view filing · original 990 ↗
$9,263$4,325,798 $41,644,659$41,644,659 $0- $0--
2019 · Form 990PF period ending 2019-12-31 · view filing · original 990 ↗
$57,573$3,556,607 $45,959,932$45,959,932 $0- $0--

Funders of this organization

Not reported: no grants to this organization appear in the filings we have (tax years 2010 to 2025).

Similar organizations

Ranked without any AI: same NTEE code first, then the same NTEE group; then revenue within 2x, 5x or 10x; then the same state; then similar name and mission text. Same state only · More (100)

OrganizationStateNTEELatest revenueLatest expensesTop-paid titleTop payWhy similar
RHODES FAMILY FOUNDATIONNYT20 $15,019,577$243,186 Director/President$0 Same NTEE code T20, revenue within 2x, same state, similar name
BURNHAM FAMILY FOUNDATIONNYT20 $25,147,421$2,864,198 EXECUTIVE DIRECTOR$179,494 Same NTEE code T20, revenue within 2x, same state, similar name
STEVE TISCH FAMILY FOUNDATIONNYT20 $12,094,321$13,270,817 TRUSTEE, PART TIME$0 Same NTEE code T20, revenue within 2x, same state, similar name
FIVE HILLS FAMILY FOUNDATIONNYT20 $17,561,297$2,558 PRESIDENT$0 Same NTEE code T20, revenue within 2x, same state, similar name
TREEHOUSE FAMILY FOUNDATIONNYT20 $24,663,788$20,907,360 DIRECTOR/PRESIDENT/TREASURE$0 Same NTEE code T20, revenue within 2x, same state, similar name
BERGER FAMILY FOUNDATION INCNYT20 $12,231,647$1,596,908 PRESIDENT$0 Same NTEE code T20, revenue within 2x, same state, similar name
HUTCHINS FAMILY FOUNDATION INCNYT20 $20,951,643$10,037,019 CHAIRMAN/TREASURER$0 Same NTEE code T20, revenue within 2x, same state, similar name
MOTULSKY-NACHT FAMILY FOUNDATIONNYT20 $16,240,009$2,333,552 TRUSTEE$0 Same NTEE code T20, revenue within 2x, same state, similar name
THE HERRNSTEIN FAMILY FOUNDATIONNYT20 $15,596,516$6,122,622 PRESIDENT & SECRETARY$0 Same NTEE code T20, revenue within 2x, same state, similar name
JONATHAN M TISCH FAMILY FOUNDATIONNYT20 $12,517,697$23,732,598 TRUSTEE, PART TIME$0 Same NTEE code T20, revenue within 2x, same state, similar name
SCOTT FOUNDATIONNYT20 $19,056,395$1,040,255 Trustee - less than 1 hr$0 Same NTEE code T20, revenue within 2x, same state, similar name
HARTMAN FAM FOUNDATIONNYT20 $30,020,038$8,863,659 PRESIDENT/TRUSTEE$0 Same NTEE code T20, revenue within 2x, same state
IVM FOUNDATIONNYT20 $26,211,756$281,374 PRESIDENT$0 Same NTEE code T20, revenue within 2x, same state
LUM FOUNDATIONNYT20 $13,300,783$2,174,922 PRESIDENT/DIRECTOR$0 Same NTEE code T20, revenue within 2x, same state
2A FOUNDATION INCNYT20 $23,785,076$5,952,675 PRESIDENT$0 Same NTEE code T20, revenue within 2x, same state
ARONOW FOUNDATIONNYT20 $14,169,899$6,094,157 DIRECTOR ; PRESIDENT & TREASURER$0 Same NTEE code T20, revenue within 2x, same state
MULAGO FOUNDATIONNYT20 $34,119,063$31,773,624 CEO$500,000 Same NTEE code T20, revenue within 2x, same state
JEFFREY H AND SHARI L ARONSONFAMILY FOUNDATIONNYT20 $21,529,170$11,466,680 TRUSTEE$0 Same NTEE code T20, revenue within 2x, same state
RACHAEL RAY FOUNDATIONNYT20 $13,895,124$15,030,351 PRESIDENT$0 Same NTEE code T20, revenue within 2x, same state
KAPNICK FOUNDATION TRNYT20 $37,424,176$8,600,683 TRUSTEE$0 Same NTEE code T20, revenue within 2x, same state
ENDEAVOR FOUNDATION INCNYT20 $26,840,443$19,587,036 PRESIDENT & TREASURER$383,216 Same NTEE code T20, revenue within 2x, same state
NEW TAMARIND FOUNDATIONNYT20 $11,252,421$9,189,546 SECRETARY, DIRECTOR$355,870 Same NTEE code T20, revenue within 2x, same state
CHANG K PARK FOUNDATIONNYT20 $10,845,665$2,218,581 CEO$0 Same NTEE code T20, revenue within 2x, same state
SUSAN S & KENNETH WALLACH FOUNDATIONNYT20 $15,486,824$5,504,408 TRUSTEE$0 Same NTEE code T20, revenue within 2x, same state
EGL CHARITABLE FOUNDATIONNYT20 $14,031,425$20,662,114 Executive Dir.$320,521 Same NTEE code T20, revenue within 2x, same state

Who funds organizations like this

Grantors that funded the 100 most similar organizations. Ranked by total given to them. Foundations (990-PF) and donor-advised fund sponsors only. Same matching as Funders above (by EIN, or by name for foundations).

GrantorTypeTotal givenGrantsOrganizations fundedYearsWhich ones
JKW FOUNDATION TR UA 092597 Private foundation$34,994,3722 22025–2025 DISTRACTED GLOBE FOUNDATION; KAT CHARITABLE FOUNDATION INC
REDLICH HORWITZ FOUNDATION Private foundation$25,000,0001 12024–2024 INSITA GROUP LTD
JEWISH COMMUNAL FUND DAF sponsor$22,426,61716 12009–2024 JEWISH FUNDERS NETWORK
OPEN SOCIETY INSTITUTE Private foundation$19,300,0004 12021–2024 MEDIA DEVELOPMENT INVESTMENT FUND INC
E&SS FOUNDATION INC Private foundation$7,828,7291 12022–2022 TIGER GLOBAL PHILANTHROPIC VENTURES INC
JOHN D & CATHERINE T MACARTHUR FOUNDATION Private foundation$4,000,0003 12022–2024 MEDIA DEVELOPMENT INVESTMENT FUND INC
THE HARRY & JEANETTE WEINBERG FOUNDATION INC Private foundation$3,613,10844 22011–2024 JEWISH FUNDERS NETWORK; UNBOUND PHILANTHROPY
SHIMON BEN JOSEPH FOUNDATION Private foundation$3,569,25032 12014–2024 JEWISH FUNDERS NETWORK
JEWISH COMMUNITY FEDERATION OF S F MARIN PENINSULA & SONOMA COUNTIES DAF sponsor$3,435,47916 12009–2024 JEWISH FUNDERS NETWORK
FOUNDATION TO PROMOTE OPEN SOCIETY Private foundation$3,406,0255 12020–2024 MEDIA DEVELOPMENT INVESTMENT FUND INC
COMBINED JEWISH PHILANTHROPIES OF GREATER BOSTON INC DAF sponsor$3,178,7009 12017–2024 JEWISH FUNDERS NETWORK
SEED THE DREAM FOUNDATION Private foundation$3,152,2605 12020–2024 JEWISH FUNDERS NETWORK
CIRCLE OF SERVICE FOUNDATION Private foundation$3,115,0006 12020–2024 JEWISH FUNDERS NETWORK
THE INVISIBLE HAND FOUNDATION Private foundation$3,000,0003 12021–2023 SETON EDUCATION PARTNERS
CHARTER FUND INC DAF sponsor$2,930,00012 12019–2024 SETON EDUCATION PARTNERS

The full list · all similar organizations

Where the money went

Every expense line on each return, biggest first: Form 990 Part IX (with its program, management and fundraising columns), 990-EZ Part I, or 990-PF Part I. Event marks lines the organization itself describes as events. “Events” in each summary adds those lines, conferences and meetings, and the direct costs of fundraising events. Unusual is not the same as improper. Many of these patterns have ordinary explanations. Check the filing.

2025 · Form 990PF · $7,902,428 spent · pay $0 · grants $7,348,855 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $7,348,855 93.0%
Taxes $280,000 3.5%
Fees: other professional $271,937 3.4%
Other expenses $1,532 0.0%
Fees: legal $104 0.0%
Total$7,902,428100%

View the filing

2024 · Form 990PF · $5,351,269 spent · pay $0 · grants $5,078,171 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $5,078,171 94.9%
Fees: other professional $260,000 4.9%
Taxes $10,977 0.2%
Other expenses $1,775 0.0%
Fees: legal $346 0.0%
Total$5,351,269100%

View the filing

2023 · Form 990PF · $9,228,048 spent · pay $0 · grants $8,962,292 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $8,962,292 97.1%
Fees: other professional $220,184 2.4%
Taxes $42,595 0.5%
Other expenses $1,930 0.0%
Fees: legal $1,047 0.0%
Total$9,228,048100%

View the filing

2022 · Form 990PF · $6,671,509 spent · pay $0 · grants $5,910,225 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $5,910,225 88.6%
Taxes $500,000 7.5%
Fees: other professional $240,000 3.6%
Fees: accounting $20,000 0.3%
Fees: legal $1,209 0.0%
Other expenses $75 0.0%
Total$6,671,509100%

View the filing

2021 · Form 990PF · $3,472,825 spent · pay $0 · grants $3,231,358 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $3,231,358 93.0%
Fees: other professional $220,000 6.3%
Fees: accounting $12,500 0.4%
Fees: legal $7,356 0.2%
Other expenses $1,611 0.0%
Total$3,472,825100%

View the filing

2020 · Form 990PF · $4,325,798 spent · pay $0 · grants $4,038,730 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $4,038,730 93.4%
Other expenses $274,068 6.3%
Taxes $13,000 0.3%
Total$4,325,798100%

View the filing

2019 · Form 990PF · $3,556,607 spent · pay $0 · grants $3,537,500 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $3,537,500 99.5%
Other expenses $16,107 0.5%
Taxes $3,000 0.1%
Total$3,556,607100%

View the filing

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