THORNE COX FAMILY FOUNDATION

Reduce your risk when donating: see where the money actually goes.

Reduce your risk when donating: see where the money actually goes.

Cite this

Plain text THORNE COX FAMILY FOUNDATION. furp.org, nonprofit organization profile, tax years 2019–2024. https://furp.org/org/thorne-cox-family-foundation-464274950. Retrieved 2026-11-10.

APA furp.org. (n.d.). THORNE COX FAMILY FOUNDATION [Nonprofit organization profile; tax years 2019–2024]. Retrieved November 10, 2026, from https://furp.org/org/thorne-cox-family-foundation-464274950

MLA “THORNE COX FAMILY FOUNDATION.” furp.org, tax years 2019–2024, https://furp.org/org/thorne-cox-family-foundation-464274950. Accessed 10 Nov. 2026.

Retrieved 2026-11-10; covers tax years 2019–2024. Data: furp.org (index © the FURP Alliance; the records are public domain).

2024 · Form 990PF · revenue $573K · expenses $656K · assets $4.3M

Also known as
C/O Brown Advisory
EIN
46-4274950
Address
100 HIGH STREET 27TH FLOOR, BOSTON, MA 02110-2321
NTEE code
T99 Philanthropy, Voluntarism, and Grantmaking Foundations N.E.C. (Philanthropy, Voluntarism and Grantmaking Foundations) published (IRS Business Master File)
Exempt type
501(c)(3): charitable, religious, educational, scientific or literary (corporation)
Ruling date
August 2014 (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Each tax year counts once: when a return was amended, only the latest return for that period is used below (superseded returns stay listed, greyed, under Finances).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 4 people listed on these returns reported compensation from the organization. They are listed below.

Officers and directors, no compensation reported

4 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
Brinkley Thorne President2019-2024 1 $0 reported 1
Mazie L Cox Vice President2019-2024 1 $0 reported 1
Yarrow Thorne Secretary2019-2024 1 $0 reported 1
Dune Thorne Treasurer2019-2024 1 $0 reported 1

People by year

2024 · 4 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Brinkley Thorne President1 $0-$0 $01
Mazie L Cox Vice President1 $0-$0 $01
Yarrow Thorne Secretary1 $0-$0 $01
Dune Thorne Treasurer1 $0-$0 $01
2023 · 4 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Brinkley Thorne President1 $0-$0 $01
Mazie L Cox Vice President1 $0-$0 $01
Yarrow Thorne Secretary1 $0-$0 $01
Dune Thorne Treasurer1 $0-$0 $01
2022 · 4 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Brinkley Thorne President1 $0-$0 $01
Mazie L Cox Vice President1 $0-$0 $01
Yarrow Thorne Secretary1 $0-$0 $01
Dune Thorne Treasurer1 $0-$0 $01
2021 · 4 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Brinkley Thorne President1 $0-$0 $01
Mazie L Cox Vice President1 $0-$0 $01
Yarrow Thorne Secretary1 $0-$0 $01
Dune Thorne Treasurer1 $0-$0 $01
2020 · 4 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Brinkley Thorne President1 $0-$0 $01
Mazie L Cox Vice President1 $0-$0 $01
Yarrow Thorne Secretary1 $0-$0 $01
Dune Thorne Treasurer1 $0-$0 $01
2019 · 4 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Brinkley Thorne President1 $0-$0 $01
Mazie L Cox Vice President1 $0-$0 $01
Yarrow Thorne Secretary1 $0-$0 $01
Dune Thorne Treasurer1 $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.

2024 · 19 grants to organizations · $572K
2023 · 21 grants to organizations · $727K
2022 · 21 grants to organizations · $915K
2021 · 18 grants to organizations · $325K
2020 · 16 grants to organizations · $429K
2019 · 10 grants to organizations · $242K

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.

2023 · 1 contributor · $519K
#ContributorTypeCity, stateTotalNoncashSource
1 Brinkley Thorne and Mazie Cox Organization or other Palm Beach, FL $519,262$519,262 Form 990PF Sch. B, 2023 · filing
2022 · 1 contributor · $777K
#ContributorTypeCity, stateTotalNoncashSource
1 Brinkley Thorne and Mazie Cox Organization or other Palm Beach, FL $776,848$776,848 Form 990PF Sch. B, 2022 · filing
2021 · 1 contributor · $209K
#ContributorTypeCity, stateTotalNoncashSource
1 Brinkley Thorne and Mazie Cox Organization or other Palm Beach, FL $208,565$208,565 Form 990PF Sch. B, 2021 · filing
2020 · 1 contributor · $701K
#ContributorTypeCity, stateTotalNoncashSource
1 Brinkley S Thorne 2008 Revocable Trust Organization or other Palm Beach, FL $700,830$700,830 Form 990PF Sch. B, 2020 · filing
2019 · 1 contributor · $431K
#ContributorTypeCity, stateTotalNoncashSource
1 Brinkley S Thorne 2008 Revocable Trust Organization or other Palm Beach, FL $430,628$430,628 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
2024 · Form 990PF period ending 2024-12-31 · view filing · original 990 ↗
$572,654$655,528 $4,293,422$4,293,422 -- $0--
2023 · Form 990PF period ending 2023-12-31 · view filing · original 990 ↗
$877,368$786,791 $3,992,700$3,992,700 $519,262- $0--
2022 · Form 990PF period ending 2022-12-31 · view filing · original 990 ↗
$841,839$990,325 $3,900,526$3,900,526 $776,848- $0--
2021 · Form 990PF period ending 2021-12-31 · view filing · original 990 ↗
$968,682$384,713 $4,768,791$4,768,791 $208,565- $0--
2020 · Form 990PF period ending 2020-12-31 · view filing · original 990 ↗
$844,463$462,078 $4,196,209$4,196,209 $700,830- $0--
2019 · Form 990PF period ending 2019-12-31 · view filing · original 990 ↗
$567,596$272,390 $3,319,787$3,314,787 $430,628- $0--

Funders of this organization

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

Nearby + Similar BETA

Organizations like this one: what they do and who they are linked to

Same category: NTEE code and revenue

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. NTEE: the IRS’s code when it lists one, otherwise FURP’s inferred code. Same state only · More (100)

OrganizationStateNTEELatest revenueLatest expensesTop-paid titleTop payWhy similar
EBLING FAMILY FOUNDATIONMAT99 $338,820$697,282 TRUSTEE$0 Same NTEE code T99, revenue within 2x, same state, similar name
WAGNER FAMILY FOUNDATION TRUSTMAT99 $341,500$58,403 TRUSTEE$0 Same NTEE code T99, revenue within 2x, same state, similar name
THE STORY EXCHANGE FOUNDATIONMAT99 $877,642$961,744 TRUSTEE$0 Same NTEE code T99, revenue within 2x, same state
MALCOLM AND EMILY MACNAUGHT CHARITABLE FOUNDATIONMAT99 $524,824$236,500 Foundation Mgr.$0 Same NTEE code T99, revenue within 2x, same state
JORDANS FURNITURE CHARITABLE FOUNDATION INCMAT99 $595,098$453,133 CEO, DIRECTOR$0 Same NTEE code T99, revenue within 2x, same state
HAND SURGERY ENDOWMENT CHARITABLE FOUNDATIONMAT99 $525,118$87,935 PRESIDENT/VICE PRESIDENT$0 Same NTEE code T99, revenue within 2x, same state
HERITAGE PLANTATION OF SANDWICH FUNDMAT99 $507,871$1,294,366 TRUSTEE/AS REQUIRED$57,078 Same NTEE code T99, revenue within 2x, same state
MASSACHUSETTS ELKS CHARITABLE TRMAT99 $367,950$406,062 Trustee$0 Same NTEE code T99, revenue within 2x, same state
JANET MALSER HUMANITIES TRUSTMAT99 $846,634$242,645 TRUSTEE$450 Same NTEE code T99, revenue within 2x, same state
FRIENDS OF MARBLEHEAD HOCKEY INCMAT99 $289,163$0 President & Director$0 Same NTEE code T99, revenue within 2x, same state
FU FAMILY FOUNDATIONCAT99 $470,523$12,259 CEOPresident$0 Same NTEE code T99, revenue within 2x, similar name
OKANE FAMILY FOUNDATIONNJT99 $473,505$706,498 Trustee$0 Same NTEE code T99, revenue within 2x, similar name
J&G FAMILY FOUNDATIONNYT99 $353,000$352,836 TRUSTEE$0 Same NTEE code T99, revenue within 2x, similar name
TOMASH FAMILY FOUNDATIONCAT99 $1,083,495$81,929 PRESIDENT$0 Same NTEE code T99, revenue within 2x, similar name
LINK FAMILY FOUNDATIONWIT99 $368,137$107,163 PRESIDENT$0 Same NTEE code T99, revenue within 2x, similar name
KRETZ FAMILY FOUNDATIONOHT99 $469,223$17,846 DIRECTOR$0 Same NTEE code T99, revenue within 2x, similar name
RUBIN FAMILY FOUNDATIONPAT99 $396,469$602,336 PRESIDENT$0 Same NTEE code T99, revenue within 2x, similar name
SIADAT FAMILY FOUNDATIONFLT99 $833,195$1,664,605 Trustee$0 Same NTEE code T99, revenue within 2x, similar name
ABBHI FAMILY FOUNDATIONFLT99 $865,494$218,117 TRUSTEE$0 Same NTEE code T99, revenue within 2x, similar name
The Speiser Family FoundationILT99 $350,495$409,624 Manager/Dir$0 Same NTEE code T99, revenue within 2x, similar name
AFZAL FAMILY FOUNDATIONPAT99 $346,467$815,193 PRESIDENT$0 Same NTEE code T99, revenue within 2x, similar name
BAKER FAMILY FOUNDATIONCAT99 $326,131$291,202 TREASURER, DIRECTOR$21,120 Same NTEE code T99, revenue within 2x, similar name
ROUSH FAMILY FOUNDATIONOHT99 $304,907$59,171 ASST SECRETARY$727,590 Same NTEE code T99, revenue within 2x, similar name
NATTER FAMILY FOUNDATIONCAT99 $614,992$347,043 DIRECTOR$0 Same NTEE code T99, revenue within 2x, similar name
SASSOON FAMILY FOUNDATIONCAT99 $443,519$624,953 President$0 Same NTEE code T99, revenue within 2x, similar name

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).

GrantorTotal givenGrantsOrganizations fundedTypeYearsWhich ones
GIVERS LEGACY FOUNDATION INC $25,000,0001 1DAF sponsor2023–2023 THE ZWM FOUNDATION
DANE G HANSEN FOUNDATION $708,91811 1Private foundation2020–2025 CITIZENS FOUNDATION
ORANGE COUNTY COMMUNITY FOUNDATION $610,00013 1DAF sponsor2012–2024 TARIQ KHAMISA FOUNDATION
FIDELITY INVESTMENTS CHARITABLE GIFT FUND $609,78321 7DAF sponsor2017–2024 FRIENDS OF MARBLEHEAD HOCKEY INC; WELLSKY FOUNDATION; JAYSON TATUM FOUNDATION; HAND SURGERY ENDOWMENT CHARITABLE FOUNDATION and 3 more
THE SAN DIEGO FOUNDATION $553,8309 1DAF sponsor2014–2024 TARIQ KHAMISA FOUNDATION
FORGOOD INC $455,2516 1DAF sponsor2019–2024 TARIQ KHAMISA FOUNDATION
EDWARD CHARLES FOUNDATION $440,0003 2DAF sponsor2017–2022 DWYANE WADE FAMILY FOUNDATION INC; JAYSON TATUM FOUNDATION
COMMUNITY FOUNDATION FOR THE FOX VALLEY REGION INC $325,0001 1DAF sponsor2017–2017 DWYANE WADE FAMILY FOUNDATION INC
MIGHTYCAUSE CHARITABLE FOUNDATION $290,4606 1DAF sponsor2019–2024 JCK FOUNDATION INC
THE CALIFORNIA ENDOWMENT $281,0004 1Private foundation2011–2014 TARIQ KHAMISA FOUNDATION
PENSKE FOUNDATION INC $235,0005 1Private foundation2021–2025 RYAN BLANEY FAMILY FOUNDATION
ELIOT AND JUNE TATELMAN FAMILY FOUNDATION $209,9181 1Private foundation2024–2024 JORDANS FURNITURE CHARITABLE FOUNDATION INC
PORTICUS NORTH AMERICA FOUNDATION $200,0002 1Private foundation2020–2021 TARIQ KHAMISA FOUNDATION
DONOR ADVISED CHARITABLE GIVING $165,1508 3DAF sponsor2014–2024 THRIVE FOUNDATION; TARIQ KHAMISA FOUNDATION; JCK FOUNDATION INC
STONIER SCHOLARSHIP INC $160,8001 1DAF sponsor2020–2020 DWYANE WADE FAMILY FOUNDATION INC

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.

2024 · Form 990PF · $655,528 spent · pay $0 · grants $572,149 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $572,149 87.3%
Other expenses $55,961 8.5%
Taxes $12,275 1.9%
Fees: accounting $11,000 1.7%
Interest $2,344 0.4%
Fees: other professional $1,799 0.3%
Total$655,528100%

View the filing

2023 · Form 990PF · $786,791 spent · pay $0 · grants $727,000 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $727,000 92.4%
Other expenses $37,471 4.8%
Fees: accounting $10,500 1.3%
Taxes $7,506 1.0%
Fees: other professional $2,572 0.3%
Interest $1,742 0.2%
Total$786,791100%

View the filing

2022 · Form 990PF · $990,325 spent · pay $0 · grants $915,000 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $915,000 92.4%
Other expenses $43,519 4.4%
Taxes $18,933 1.9%
Fees: accounting $9,500 1.0%
Fees: other professional $2,248 0.2%
Interest $1,125 0.1%
Total$990,325100%

View the filing

2021 · Form 990PF · $384,713 spent · pay $0 · grants $324,528 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $324,528 84.4%
Other expenses $31,022 8.1%
Taxes $16,595 4.3%
Fees: accounting $6,000 1.6%
Interest $3,443 0.9%
Fees: other professional $3,125 0.8%
Total$384,713100%

View the filing

2020 · Form 990PF · $462,078 spent · pay $0 · grants $429,414 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $429,414 92.9%
Other expenses $23,338 5.1%
Fees: accounting $5,500 1.2%
Fees: other professional $2,883 0.6%
Interest $493 0.1%
Taxes $450 0.1%
Total$462,078100%

View the filing

2019 · Form 990PF · $272,390 spent · pay $0 · grants $242,500 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $242,500 89.0%
Other expenses $22,047 8.1%
Fees: accounting $5,000 1.8%
Fees: other professional $1,439 0.5%
Interest $821 0.3%
Taxes $583 0.2%
Total$272,390100%

View the filing

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