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Each tax year counts once: when a return was amended, only the latest return for that period is used below (superseded returns stay listed, greyed, under Finances).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.
| Name | Latest title | Years | Hrs/wk (latest) | Compensation | Organizations |
|---|---|---|---|---|---|
| Brinkley Thorne | President | 2019-2024 | 1 | $0 reported | 1 |
| Mazie L Cox | Vice President | 2019-2024 | 1 | $0 reported | 1 |
| Yarrow Thorne | Secretary | 2019-2024 | 1 | $0 reported | 1 |
| Dune Thorne | Treasurer | 2019-2024 | 1 | $0 reported | 1 |
People by year
2024 · 4 people listed · none paid
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| Brinkley Thorne | President | 1 | $0 | - | $0 | $0 | 1 |
| Mazie L Cox | Vice President | 1 | $0 | - | $0 | $0 | 1 |
| Yarrow Thorne | Secretary | 1 | $0 | - | $0 | $0 | 1 |
| Dune Thorne | Treasurer | 1 | $0 | - | $0 | $0 | 1 |
2023 · 4 people listed · none paid
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| Brinkley Thorne | President | 1 | $0 | - | $0 | $0 | 1 |
| Mazie L Cox | Vice President | 1 | $0 | - | $0 | $0 | 1 |
| Yarrow Thorne | Secretary | 1 | $0 | - | $0 | $0 | 1 |
| Dune Thorne | Treasurer | 1 | $0 | - | $0 | $0 | 1 |
2022 · 4 people listed · none paid
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| Brinkley Thorne | President | 1 | $0 | - | $0 | $0 | 1 |
| Mazie L Cox | Vice President | 1 | $0 | - | $0 | $0 | 1 |
| Yarrow Thorne | Secretary | 1 | $0 | - | $0 | $0 | 1 |
| Dune Thorne | Treasurer | 1 | $0 | - | $0 | $0 | 1 |
2021 · 4 people listed · none paid
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| Brinkley Thorne | President | 1 | $0 | - | $0 | $0 | 1 |
| Mazie L Cox | Vice President | 1 | $0 | - | $0 | $0 | 1 |
| Yarrow Thorne | Secretary | 1 | $0 | - | $0 | $0 | 1 |
| Dune Thorne | Treasurer | 1 | $0 | - | $0 | $0 | 1 |
2020 · 4 people listed · none paid
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| Brinkley Thorne | President | 1 | $0 | - | $0 | $0 | 1 |
| Mazie L Cox | Vice President | 1 | $0 | - | $0 | $0 | 1 |
| Yarrow Thorne | Secretary | 1 | $0 | - | $0 | $0 | 1 |
| Dune Thorne | Treasurer | 1 | $0 | - | $0 | $0 | 1 |
2019 · 4 people listed · none paid
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| Brinkley Thorne | President | 1 | $0 | - | $0 | $0 | 1 |
| Mazie L Cox | Vice President | 1 | $0 | - | $0 | $0 | 1 |
| Yarrow Thorne | Secretary | 1 | $0 | - | $0 | $0 | 1 |
| Dune Thorne | Treasurer | 1 | $0 | - | $0 | $0 | 1 |
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
| # | Contributor | Type | City, state | Total | Noncash | Source |
|---|---|---|---|---|---|---|
| 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
| # | Contributor | Type | City, state | Total | Noncash | Source |
|---|---|---|---|---|---|---|
| 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
| # | Contributor | Type | City, state | Total | Noncash | Source |
|---|---|---|---|---|---|---|
| 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
| # | Contributor | Type | City, state | Total | Noncash | Source |
|---|---|---|---|---|---|---|
| 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
| # | Contributor | Type | City, state | Total | Noncash | Source |
|---|---|---|---|---|---|---|
| 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.
| Revenue | Expenses | Assets | Net assets | Contributions | Program revenue | Officer pay | Employees | Volunteers |
|---|---|---|---|---|---|---|---|---|
| 2024 · Form 990PF | ||||||||
| $572,654 | $655,528 | $4,293,422 | $4,293,422 | - | - | $0 | - | - |
| 2023 · Form 990PF | ||||||||
| $877,368 | $786,791 | $3,992,700 | $3,992,700 | $519,262 | - | $0 | - | - |
| 2022 · Form 990PF | ||||||||
| $841,839 | $990,325 | $3,900,526 | $3,900,526 | $776,848 | - | $0 | - | - |
| 2021 · Form 990PF | ||||||||
| $968,682 | $384,713 | $4,768,791 | $4,768,791 | $208,565 | - | $0 | - | - |
| 2020 · Form 990PF | ||||||||
| $844,463 | $462,078 | $4,196,209 | $4,196,209 | $700,830 | - | $0 | - | - |
| 2019 · Form 990PF | ||||||||
| $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)
| Organization | State | NTEE | Latest revenue | Latest expenses | Top-paid title | Top pay | Why similar |
|---|---|---|---|---|---|---|---|
| EBLING FAMILY FOUNDATION | MA | T99 | $338,820 | $697,282 | TRUSTEE | $0 | Same NTEE code T99, revenue within 2x, same state, similar name |
| WAGNER FAMILY FOUNDATION TRUST | MA | T99 | $341,500 | $58,403 | TRUSTEE | $0 | Same NTEE code T99, revenue within 2x, same state, similar name |
| THE STORY EXCHANGE FOUNDATION | MA | T99 | $877,642 | $961,744 | TRUSTEE | $0 | Same NTEE code T99, revenue within 2x, same state |
| MALCOLM AND EMILY MACNAUGHT CHARITABLE FOUNDATION | MA | T99 | $524,824 | $236,500 | Foundation Mgr. | $0 | Same NTEE code T99, revenue within 2x, same state |
| JORDANS FURNITURE CHARITABLE FOUNDATION INC | MA | T99 | $595,098 | $453,133 | CEO, DIRECTOR | $0 | Same NTEE code T99, revenue within 2x, same state |
| HAND SURGERY ENDOWMENT CHARITABLE FOUNDATION | MA | T99 | $525,118 | $87,935 | PRESIDENT/VICE PRESIDENT | $0 | Same NTEE code T99, revenue within 2x, same state |
| HERITAGE PLANTATION OF SANDWICH FUND | MA | T99 | $507,871 | $1,294,366 | TRUSTEE/AS REQUIRED | $57,078 | Same NTEE code T99, revenue within 2x, same state |
| MASSACHUSETTS ELKS CHARITABLE TR | MA | T99 | $367,950 | $406,062 | Trustee | $0 | Same NTEE code T99, revenue within 2x, same state |
| JANET MALSER HUMANITIES TRUST | MA | T99 | $846,634 | $242,645 | TRUSTEE | $450 | Same NTEE code T99, revenue within 2x, same state |
| FRIENDS OF MARBLEHEAD HOCKEY INC | MA | T99 | $289,163 | $0 | President & Director | $0 | Same NTEE code T99, revenue within 2x, same state |
| FU FAMILY FOUNDATION | CA | T99 | $470,523 | $12,259 | CEOPresident | $0 | Same NTEE code T99, revenue within 2x, similar name |
| OKANE FAMILY FOUNDATION | NJ | T99 | $473,505 | $706,498 | Trustee | $0 | Same NTEE code T99, revenue within 2x, similar name |
| J&G FAMILY FOUNDATION | NY | T99 | $353,000 | $352,836 | TRUSTEE | $0 | Same NTEE code T99, revenue within 2x, similar name |
| TOMASH FAMILY FOUNDATION | CA | T99 | $1,083,495 | $81,929 | PRESIDENT | $0 | Same NTEE code T99, revenue within 2x, similar name |
| LINK FAMILY FOUNDATION | WI | T99 | $368,137 | $107,163 | PRESIDENT | $0 | Same NTEE code T99, revenue within 2x, similar name |
| KRETZ FAMILY FOUNDATION | OH | T99 | $469,223 | $17,846 | DIRECTOR | $0 | Same NTEE code T99, revenue within 2x, similar name |
| RUBIN FAMILY FOUNDATION | PA | T99 | $396,469 | $602,336 | PRESIDENT | $0 | Same NTEE code T99, revenue within 2x, similar name |
| SIADAT FAMILY FOUNDATION | FL | T99 | $833,195 | $1,664,605 | Trustee | $0 | Same NTEE code T99, revenue within 2x, similar name |
| ABBHI FAMILY FOUNDATION | FL | T99 | $865,494 | $218,117 | TRUSTEE | $0 | Same NTEE code T99, revenue within 2x, similar name |
| The Speiser Family Foundation | IL | T99 | $350,495 | $409,624 | Manager/Dir | $0 | Same NTEE code T99, revenue within 2x, similar name |
| AFZAL FAMILY FOUNDATION | PA | T99 | $346,467 | $815,193 | PRESIDENT | $0 | Same NTEE code T99, revenue within 2x, similar name |
| BAKER FAMILY FOUNDATION | CA | T99 | $326,131 | $291,202 | TREASURER, DIRECTOR | $21,120 | Same NTEE code T99, revenue within 2x, similar name |
| ROUSH FAMILY FOUNDATION | OH | T99 | $304,907 | $59,171 | ASST SECRETARY | $727,590 | Same NTEE code T99, revenue within 2x, similar name |
| NATTER FAMILY FOUNDATION | CA | T99 | $614,992 | $347,043 | DIRECTOR | $0 | Same NTEE code T99, revenue within 2x, similar name |
| SASSOON FAMILY FOUNDATION | CA | T99 | $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).
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
| Line | As described | Total | Share |
|---|---|---|---|
| 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 | $655,528 | 100% |
2023 · Form 990PF · $786,791 spent · pay $0 · grants $727,000 · events $0
| Line | As described | Total | Share |
|---|---|---|---|
| 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 | $786,791 | 100% |
2022 · Form 990PF · $990,325 spent · pay $0 · grants $915,000 · events $0
| Line | As described | Total | Share |
|---|---|---|---|
| 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 | $990,325 | 100% |
2021 · Form 990PF · $384,713 spent · pay $0 · grants $324,528 · events $0
| Line | As described | Total | Share |
|---|---|---|---|
| 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 | $384,713 | 100% |
2020 · Form 990PF · $462,078 spent · pay $0 · grants $429,414 · events $0
| Line | As described | Total | Share |
|---|---|---|---|
| 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 | $462,078 | 100% |
2019 · Form 990PF · $272,390 spent · pay $0 · grants $242,500 · events $0
| Line | As described | Total | Share |
|---|---|---|---|
| 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 | $272,390 | 100% |
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