STRATEGY STUDIO / PUBLIC DATA EXPLORER

HALFF WINDHAM FOUNDATION

Cite this

Plain text HALFF WINDHAM FOUNDATION. Strategy Studio, nonprofit organization profile, tax years 2019–2025. https://strategystudio.org/org/832365293. Retrieved 2026-10-19.

APA Strategy Studio. (n.d.). HALFF WINDHAM FOUNDATION [Nonprofit organization profile; tax years 2019–2025]. Retrieved October 19, 2026, from https://strategystudio.org/org/832365293

MLA “HALFF WINDHAM FOUNDATION.” Strategy Studio, tax years 2019–2025, https://strategystudio.org/org/832365293. Accessed 19 Oct. 2026.

Retrieved 2026-10-19; covers tax years 2019–2025. Data: Strategy Studio, CC BY 4.0.

2025 · Form 990PF · revenue $747K · expenses $745K · assets $3.1M

EIN
83-2365293
Address
FOUNDATION SOURCE 501 SILVERSIDE RD, WILMINGTON, DE 19809-0000
NTEE code
T20
Subsection
501(c)(3)
Ruling year
2019
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Each tax year counts once: when a return was amended, only the latest return for that period is used below (superseded returns stay listed, greyed, under Finances).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 2 people listed on these returns reported compensation from the organization. They are listed below.

Officers and directors, no compensation reported

2 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
Lawrence Halff Dir, Pres, Treas2019-2025 10 $0 reported 1
Charles R Windham Sec2019-2025 2 $0 reported 1

People by year

2025 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Lawrence Halff Dir, Pres, Treas10 $0-$0 $01
Charles R Windham Sec2 $0-$0 $01
2024 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Lawrence Halff Dir, Pres, Treas10 $0-$0 $01
Charles R Windham Sec2 $0-$0 $01
2023 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Lawrence Halff Dir, Pres, Treas1 $0-$0 $01
Charles R Windham Sec1 $0-$0 $01
2022 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Lawrence Halff Dir, Pres, Treas1 $0-$0 $01
Charles R Windham Sec1 $0-$0 $01
2021 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Lawrence Halff Dir, Pres, Treas1 $0-$0 $01
Charles R Windham Sec1 $0-$0 $01
2020 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Lawrence Halff Dir, Pres, Treas1 $0-$0 $01
Charles R Windham Sec1 $0-$0 $01
2019 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Lawrence Halff Dir, Pres, Treas1 $0-$0 $01
Charles R Windham Sec1 $0-$0 $01

Highest-paid independent contractors

No independent contractors reported.

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 · 8 grants to organizations · $704K
2024 · 4 grants to organizations · $305K
2023 · 3 grants to organizations · $115K
2022 · 5 grants to organizations · $121K
2021 · 6 grants to organizations · $42K
2020 · 6 grants to organizations · $48K
2019 · 7 grants to organizations · $47K

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 · 1 contributor · $700K
#ContributorTypeCity, stateTotalNoncashSource
1 The Lawrence A Halff Living Trust Person Arlington, VA $700,000- Form 990PF Sch. B, 2025 · filing
2024 · 1 contributor · $961K
#ContributorTypeCity, stateTotalNoncashSource
1 The Lawrence A Halff Living Trust Person Arlington, VA $960,521$360,522 Form 990PF Sch. B, 2024 · filing
2023 · 1 contributor · $849K
#ContributorTypeCity, stateTotalNoncashSource
1 The Lawrence A Halff Living Trust Person San Francisco, CA $848,890$498,891 Form 990PF Sch. B, 2023 · filing
2022 · 1 contributor · $925K
#ContributorTypeCity, stateTotalNoncashSource
1 The Lawrence A Halff Living Trust Person San Francisco, CA $925,190$180,190 Form 990PF Sch. B, 2022 · filing
2021 · 1 contributor · $350K
#ContributorTypeCity, stateTotalNoncashSource
1 The Lawrence A Halff Living Trust Person San Francisco, CA $350,000- Form 990PF Sch. B, 2021 · filing
2020 · 1 contributor · $119K
#ContributorTypeCity, stateTotalNoncashSource
1 The Lawrence A Halff Living Trust Person San Francisco, CA $119,342$99,344 Form 990PF Sch. B, 2020 · filing
2019 · 1 contributor · $275K
#ContributorTypeCity, stateTotalNoncashSource
1 The Lawrence A Halff Living Trust Person San Francisco, CA $275,000- Form 990PF Sch. B, 2019 · 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 ↗
$747,471$744,931 $3,109,054$3,109,054 $700,000- $0--
2024 · Form 990PF period ending 2024-12-31 · view filing · original 990 ↗
$975,934$336,995 $3,106,514$3,106,514 $960,521- $0--
2023 · Form 990PF period ending 2023-12-31 · view filing · original 990 ↗
$871,321$138,705 $2,467,575$2,467,575 $848,890- $0--
2022 · Form 990PF period ending 2022-12-31 · view filing · original 990 ↗
$897,398$136,215 $1,734,959$1,734,959 $925,190- $0--
2021 · Form 990PF period ending 2021-12-31 · view filing · original 990 ↗
$392,515$54,282 $973,776$973,776 $350,000- $0--
2020 · Form 990PF period ending 2020-12-31 · view filing · original 990 ↗
$85,217$59,263 $635,543$635,543 $119,342- $0--
2019 · Form 990PF period ending 2019-12-31 · view filing · original 990 ↗
$272,052$62,416 $609,589$609,589 $275,000- $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
RUTH WINKELMAN WENDER FOUNDATIONDET20 $811,536$758,593 TRUSTEE$108,122 Same NTEE code T20, revenue within 2x, same state
AMICUS AMICO FOUNDATIONDET20 $761,736$305,434 Co- Pres, Dir$0 Same NTEE code T20, revenue within 2x, same state
GLENLAUREL FOUNDATIONDET20 $726,624$94,589 VP, Dir$0 Same NTEE code T20, revenue within 2x, same state
CEDAR SPRAY FOUNDATIONDET20 $805,368$421,719 Dir, Sec$0 Same NTEE code T20, revenue within 2x, same state
COLMAN FAMILY FOUNDATIONDET20 $731,251$598,411 Trustee$45,710 Same NTEE code T20, revenue within 2x, same state
ACIERNO FAMILY FOUNDATIONDET20 $731,281$645,524 DIRECTOR/PRESIDENT/TREASUR$0 Same NTEE code T20, revenue within 2x, same state
COSTOLO FAMILY FOUNDATIONDET20 $778,127$505,411 Dir, Pres$0 Same NTEE code T20, revenue within 2x, same state
LIGHTEN FAMILY FOUNDATIONDET20 $702,396$138,693 VP$0 Same NTEE code T20, revenue within 2x, same state
REPLOGLE FAMILY FOUNDATIONDET20 $804,280$393,398 Dir, Sec, Pres$0 Same NTEE code T20, revenue within 2x, same state
BARBARA AND WILLIAM ROSENTHAL FAMILY FOUNDATIONDET20 $792,410$223,392 TRUSTEE, AS REQ'D$145,657 Same NTEE code T20, revenue within 2x, same state
RED WAGON CALAGIONE FAMILY FOUNDATIONDET20 $714,236$489,072 PRESIDENT$0 Same NTEE code T20, revenue within 2x, same state
SILVER CANDLESTICKS FOUNDATIONDET20 $722,973$135,550 Co- Pres, Dir, Sec, Treas$0 Same NTEE code T20, revenue within 2x, same state
GLORYA KAUFMAN DANCE FOUNDATIONDET20 $805,172$65,183 CO-TRUSTEE$0 Same NTEE code T20, revenue within 2x, same state
PAUL AND JUNE ROSSETTI FOUNDATIONDET20 $745,543$832,173 VP$0 Same NTEE code T20, revenue within 2x, same state
CAROLINE M LOWNDES FOUNDATION INCDET20 $758,045$357,580 Pres, Dir, Sec$12,000 Same NTEE code T20, revenue within 2x, same state
ANN B ZEKAUSKAS FAMILY FOUNDATION INCDET20 $697,147$527,074 Dir, Pres$33,921 Same NTEE code T20, revenue within 2x, same state
EDITH W MACGUIRE CHARITABLE TRUSTDET20 $807,488$724,675 TRUSTEE, AS REQ'$94,976 Same NTEE code T20, revenue within 2x, same state
WINDHOVER FOUNDATIONNHT20 $680,087$162,294 PRESIDENT$0 Same NTEE code T20, revenue within 2x, similar name
HARRIS FOUNDATIONVAT20 $789,488$441,013 President$0 Same NTEE code T20, revenue within 2x, similar name
FDC FOUNDATIONILT20 $726,274$715,497 President$24,000 Same NTEE code T20, revenue within 2x
FOUR1 FOUNDATIONART20 $795,350$918,214 DIRECTOR/PRESIDENT/TREASUR$0 Same NTEE code T20, revenue within 2x
JG FOUNDATIONCAT20 $689,277$40,000 PRESIDENT$0 Same NTEE code T20, revenue within 2x
WALKER FOUNDATIONWAT20 $803,831$489,863 VICE PRESIDENT$8,133 Same NTEE code T20, revenue within 2x
HANSBERGER FOUNDATIONIDT20 $739,633$2,006,585 TRUSTEE$0 Same NTEE code T20, revenue within 2x
B & D FOUNDATIONILT20 $750,075$193,038 PRESIDENT/DIRECTOR$0 Same NTEE code T20, revenue within 2x

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
ESB CHARITABLE FOUNDATION Private foundation$550,0004 12021–2024 MBD & JFD FOUNDATION
VANGUARD CHARITABLE ENDOWMENT PROGRAM DAF sponsor$155,0005 12020–2024 ARCADIA FOUNDATION
HONG ZHANG & LIYA LIANG FOUNDATION Private foundation$92,2506 12017–2023 PEACH FOUNDATION
Frederick Hammersley Foundation Private foundation$87,7001 12017–2017 MONIMOS FOUNDATION
GRANITE FOUNDATION Private foundation$50,0001 12023–2023 MAINSL FOUNDATION
DOCK STREET FOUNDATION Private foundation$44,0009 12013–2025 KHALED HOSSEINI FOUNDATION
SIEGEL & FRIEND FOUNDATION Private foundation$37,0009 12014–2024 KHALED HOSSEINI FOUNDATION
COIT FAMILY FOUNDATION Private foundation$25,0001 12021–2021 KHALED HOSSEINI FOUNDATION
JOHN W AND CLARA C HIGGINS FOUNDATION Private foundation$21,1007 12018–2024 EMILY HARVEY FOUNDATION
ROWBOAT FAMILY FOUNDATION Private foundation$10,0001 12024–2024 BAIRD FOUNDATION
CLARE AND ROBERT GRAY CHARITABLE FOUNDATION Private foundation$8,3003 12020–2023 KHALED HOSSEINI FOUNDATION
JOHN P ELLBOGEN FOUNDATION Private foundation$5,5002 12022–2023 ORRS HOPE FOUNDATION
RAY SUTTON MCGEHEE FOUNDATION Private foundation$3,6002 12016–2017 BAIRD FOUNDATION
BRYANT FOUNDATION INC Private foundation$1,0001 12021–2021 HACKETT FAMILY FOUNDATION
GRAY FAMILY FOUNDATION INC Private foundation$1,0001 12021–2021 KHALED HOSSEINI FOUNDATION

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 · $744,931 spent · pay $0 · grants $703,500 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $703,500 94.4%
Fees: other professional $25,211 3.4%
Other expenses $15,321 2.1%
Taxes $899 0.1%
Total$744,931100%

View the filing

2024 · Form 990PF · $336,995 spent · pay $0 · grants $305,000 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $305,000 90.5%
Fees: other professional $18,467 5.5%
Other expenses $12,893 3.8%
Taxes $635 0.2%
Total$336,995100%

View the filing

2023 · Form 990PF · $138,705 spent · pay $0 · grants $115,000 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $115,000 82.9%
Other expenses $11,935 8.6%
Fees: other professional $11,547 8.3%
Taxes $223 0.2%
Total$138,705100%

View the filing

2022 · Form 990PF · $136,215 spent · pay $0 · grants $121,000 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $121,000 88.8%
Other expenses $8,172 6.0%
Fees: other professional $6,476 4.8%
Taxes $567 0.4%
Total$136,215100%

View the filing

2021 · Form 990PF · $54,282 spent · pay $0 · grants $42,000 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $42,000 77.4%
Other expenses $7,207 13.3%
Fees: other professional $4,768 8.8%
Taxes $307 0.6%
Total$54,282100%

View the filing

2020 · Form 990PF · $59,263 spent · pay $0 · grants $48,500 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $48,500 81.8%
Other expenses $6,837 11.5%
Fees: other professional $3,578 6.0%
Taxes $348 0.6%
Total$59,263100%

View the filing

2019 · Form 990PF · $62,416 spent · pay $0 · grants $47,000 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $47,000 75.3%
Other expenses $12,966 20.8%
Fees: other professional $2,365 3.8%
Taxes $85 0.1%
Total$62,416100%

View the filing