MICHAEL AND KAREN STONE FAMILY FOUNDATION INC
Cite this
Plain text MICHAEL AND KAREN STONE FAMILY FOUNDATION INC. furp.org, nonprofit organization profile, tax years 2012–2024. https://furp.org/org/michael-and-karen-stone-family-foundation-inc-050544633. Retrieved 2026-10-28.
APA furp.org. (n.d.). MICHAEL AND KAREN STONE FAMILY FOUNDATION INC [Nonprofit organization profile; tax years 2012–2024]. Retrieved October 28, 2026, from https://furp.org/org/michael-and-karen-stone-family-foundation-inc-050544633
MLA “MICHAEL AND KAREN STONE FAMILY FOUNDATION INC.” furp.org, tax years 2012–2024, https://furp.org/org/michael-and-karen-stone-family-foundation-inc-050544633. Accessed 28 Oct. 2026.
Retrieved 2026-10-28; covers tax years 2012–2024. Data: furp.org, CC BY 4.0.
2024 · Form 990PF · revenue $8.4M · expenses $3.2M · assets $63.3M
- Also known as
- Foundation Inc
- EIN
- 05-0544633
- Address
- FOUNDATION SOURCE 501 SILVERSIDE RD, WILMINGTON, DE 19809-0000
- NTEE code
- T22
- Exempt type
- 501(c)(3): charitable, religious, educational, scientific or literary (corporation)
- Ruling date
- June 2003 (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Each tax year counts once: when a return was amended, only the latest return for that period is used below (superseded returns stay listed, greyed, under Finances).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 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.
| Name | Latest title | Years | Hrs/wk (latest) | Compensation | Organizations |
|---|---|---|---|---|---|
| Karen M Stone | Dir | 2012-2024 | 1 | $0 reported | 2 |
| Michael R Stone | Pres, Dir, Sec | 2012-2024 | 1 | $0 reported | 2 |
People by year
2024 · 2 people listed · none paid
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| Karen M Stone | Dir | 1 | $0 | - | $0 | $0 | 2 |
| Michael R Stone | Pres, Dir, Sec | 1 | $0 | - | $0 | $0 | 2 |
2023 · 2 people listed · none paid
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| Karen M Stone | Dir | 1 | $0 | - | $0 | $0 | 2 |
| Michael R Stone | Pres, Dir, Sec | 1 | $0 | - | $0 | $0 | 2 |
2022 · 2 people listed · none paid
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| Karen M Stone | Dir | 1 | $0 | - | $0 | $0 | 2 |
| Michael R Stone | Pres, Dir, Sec | 1 | $0 | - | $0 | $0 | 2 |
2021 · 2 people listed · none paid
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| Karen M Stone | Dir | 1 | $0 | - | $0 | $0 | 2 |
| Michael R Stone | Pres, Dir, Sec | 1 | $0 | - | $0 | $0 | 2 |
2020 · 2 people listed · none paid
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| Karen M Stone | Dir | 1 | $0 | - | $0 | $0 | 2 |
| Michael R Stone | Pres, Dir, Sec | 1 | $0 | - | $0 | $0 | 2 |
2012 · 2 people listed · none paid
| Name | Title | Hrs/wk | From org | From related | Other | Total | Orgs |
|---|---|---|---|---|---|---|---|
| Karen M Stone | Dir | 1 | $0 | - | - | $0 | 2 |
| Michael R Stone | Pres / Dir / Sec | 1 | $0 | - | - | $0 | 2 |
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 · 38 grants to organizations · $2.9M
2023 · 20 grants to organizations · $2.5M
2022 · 53 grants to organizations · $2.5M
2021 · 23 grants to organizations · $1.9M
2020 · 29 grants to organizations · $2.1M
2012 · 31 grants to organizations · $1.0M
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.
2024 · 1 contributor · $2.3M
| # | Contributor | Type | City, state | Total | Noncash | Source |
|---|---|---|---|---|---|---|
| 1 | Stone Michael R | Person | La Jolla, CA | $2,314,750 | $2,314,750 | Form 990PF Sch. B, 2024 · filing |
2023 · 1 contributor · $2.9M
| # | Contributor | Type | City, state | Total | Noncash | Source |
|---|---|---|---|---|---|---|
| 1 | Stone Map Atlas Foundation | Person | Wilmington, DE | $2,900,000 | - | Form 990PF Sch. B, 2023 · filing |
2021 · 3 contributors · $4.6M
| # | Contributor | Type | City, state | Total | Noncash | Source |
|---|---|---|---|---|---|---|
| 1 | Ptolemy Capital LLC | Person | La Jolla, CA | $4,363,995 | $4,363,995 | Form 990PF Sch. B, 2021 · filing |
| 2 | Stone Family Trust dated April 24 | Person | La Jolla, CA | $136,011 | $136,011 | Form 990PF Sch. B, 2021 · filing |
| 3 | Stone Michael R | Person | La Jolla, CA | $96,532 | $96,532 | Form 990PF Sch. B, 2021 · filing |
2020 · 3 contributors · $145K
2012 · 1 contributor · $1.2M
| # | Contributor | Type | City, state | Total | Noncash | Source |
|---|---|---|---|---|---|---|
| 1 | Stone Michael R | Organization or other | La Jolla, CA | $1,150,554 | - | Form 990PF Sch. B, 2012 · 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 | ||||||||
| $8,436,567 | $3,188,352 | $63,312,311 | $63,312,311 | $2,314,750 | - | $0 | - | - |
| 2023 · Form 990PF | ||||||||
| $7,963,655 | $2,928,737 | $58,068,172 | $58,068,172 | $2,900,000 | - | $0 | - | - |
| 2022 · Form 990PF | ||||||||
| $5,790,242 | $2,921,475 | $53,031,828 | $53,031,828 | $0 | - | $0 | - | - |
| 2021 · Form 990PF | ||||||||
| $11,619,305 | $2,268,468 | $50,162,061 | $50,162,061 | $4,596,538 | - | $0 | - | - |
| 2020 · Form 990PF | ||||||||
| $3,388,001 | $2,531,492 | $40,811,224 | $40,811,224 | $145,000 | - | $0 | - | - |
| 2012 · Form 990PF | ||||||||
| $1,490,064 | $1,185,539 | $8,602,870 | $8,602,870 | - | - | - | - | - |
Connected to
Organizations that list some of the same people on their returns (officers, directors, key employees on this organization’s latest return), and related organizations it lists on Schedule R.
- STONE MAP AND ATLAS FOUNDATION Wilmington, DE · 2 people in common (Karen M Stone, Michael R Stone)
Funders of this organization
1 grantor reported grants to this organization, $2,900,000 in all, tax years 2023 to 2023. Exact: the grantor wrote this organization's EIN. Fuzzy: the grantor wrote only a name (foundations' 990-PF has no EIN field), matched to the same or a near-identical name in the same state; the name as filed is shown. From the latest return for each grantor and year, so amended returns aren't counted twice. CSV
| Grantor | Type | Match | Years given | Grants | Total | Latest year | Latest year's amount | Grants |
|---|---|---|---|---|---|---|---|---|
| STONE MAP AND ATLAS FOUNDATION | Private foundation | Fuzzy filed as “MICHAEL AND KAREN STONE FAMILY FOUNDATION INC” | 2023 | 1 | $2,900,000 | 2023 | $2,900,000 | show |
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)
| Organization | State | NTEE | Latest revenue | Latest expenses | Top-paid title | Top pay | Why similar |
|---|---|---|---|---|---|---|---|
| PRICE 4 FAMILY FOUNDATION INC | DE | T22 | $7,932,252 | $0 | DIRECTOR | $0 | Same NTEE code T22, revenue within 2x, same state |
| WHITCOMB FAMILY FOUNDATION INC | DE | T22 | $12,139,483 | $4,854,098 | Dir | $0 | Same NTEE code T22, revenue within 2x, same state |
| GERRI AND RICH WONG FAMILY FOUNDATION | DE | T22 | $7,073,093 | $4,174,752 | Dir, Pres | $0 | Same NTEE code T22, revenue within 2x, same state |
| JOHN AND JULIE SCHMIDT FAMILY FOUNDATION | DE | T22 | $10,840,131 | $668,773 | VP | $0 | Same NTEE code T22, revenue within 2x, same state |
| PINCUS FAMILY FOUNDATION | DE | T22 | $8,146,451 | $7,637,741 | PRES/CEO | $337,699 | Same NTEE code T22, revenue within 2x, same state |
| SIERRA PINE FAMILY FOUNDATION | DE | T22 | $5,306,196 | $377,405 | Dir, Pres | $0 | Same NTEE code T22, revenue within 2x, same state |
| KELLEHER FAMILY FOUNDATION | DE | T22 | $14,009,127 | $7,000 | Dir, Sec, Treas, Pres, Co- Pre | $0 | Same NTEE code T22, revenue within 2x, same state |
| HOPE AND HUNGER FOUNDATION INC | DE | T22 | $13,669,684 | $48,423 | Dir, Treas | $0 | Same NTEE code T22, revenue within 2x, same state |
| TEETS FAMILY FOUNDATION | DE | T22 | $10,287,712 | $14,763 | Dir | $0 | Same NTEE code T22, revenue within 2x, same state |
| MACKENZIE FAMILY FOUNDATION | DE | T22 | $10,579,175 | $6,882,357 | Dir | $0 | Same NTEE code T22, revenue within 2x, same state |
| THE S LEE FAMILY FOUNDATION | DE | T22 | $5,938,262 | $30,261 | Sec, Treas | $0 | Same NTEE code T22, revenue within 2x, same state |
| WOODY FAMILY FOUNDATION | DE | T22 | $5,810,610 | $8,000 | Dir, Sec, Treas | $0 | Same NTEE code T22, revenue within 2x, same state |
| SCHUESSLER FAMILY FOUNDATION | DE | T22 | $8,497,734 | $1,138,832 | Dir, Pres, Sec, Treas | $0 | Same NTEE code T22, revenue within 2x, same state |
| REYNOLDS FAMILY FOUNDATION | DE | T22 | $6,978,908 | $3,695,221 | Trustee | $0 | Same NTEE code T22, revenue within 2x, same state |
| JAY FARNER FAMILY FOUNDATION | DE | T22 | $12,552,069 | $620,519 | Pres, Dir | $0 | Same NTEE code T22, revenue within 2x, same state |
| MARILYN J DAKIN FAMILY FOUNDATION | DE | T22 | $14,666,087 | $314,626 | Dir, Pres, Treas, Sec | $58,500 | Same NTEE code T22, revenue within 2x, same state |
| BRENT AND KATHRYN WOOD FOUNDATION | DE | T22 | $7,814,114 | $1,682,350 | Trustee | $0 | Same NTEE code T22, revenue within 2x, same state |
| CHRISTOPHER ROBERT FAMILY FOUNDATION | DE | T22 | $10,870,635 | $8,878,612 | Dir, Pres, Sec, Treas | $0 | Same NTEE code T22, revenue within 2x, same state |
| ACAHAND FOUNDATION | DE | T22 | $5,466,075 | $4,653,987 | PROGRAM OFFICER | $126,824 | Same NTEE code T22, revenue within 2x, same state |
| CARL M FREEMAN FOUNDATION INC | DE | T22 | $6,510,449 | $6,400,740 | EXECUTIVE DIRECTOR | $151,551 | Same NTEE code T22, revenue within 2x, same state |
| THE CHRISTOPHER M BARNETT FAMILY FOUNDATION | DE | T22 | $8,327,670 | $1,057,019 | Dir, Pres, Chair | $0 | Same NTEE code T22, revenue within 2x, same state |
| THE RAATT DEJONG FAMILY FOUNDATION | DE | T22 | $15,147,039 | $285,085 | Dir, Pres, Sec, Treas | $0 | Same NTEE code T22, revenue within 2x, same state |
| ANAM FOUNDATION | DE | T22 | $9,055,749 | $117,278 | Dir, Pres, Sec | $0 | Same NTEE code T22, revenue within 2x, same state |
| RETRIEVER UNLEASHED FAMILY FOUNDATION | DE | T22 | $6,002,500 | $2,500 | Dir, Pres | $0 | Same NTEE code T22, revenue within 2x, same state |
| XIAOHONG AND WEI ZHU FOUNDATION | DE | T22 | $5,510,657 | $10,249 | Dir, Pres, Sec, Treas | $0 | Same NTEE code T22, 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).
| Grantor | Type | Total given | Grants | Organizations funded | Years | Which ones |
|---|---|---|---|---|---|---|
| THE GILBANE FAMILY FOUNDATION | Private foundation | $7,338,992 | 1 | 1 | 2023–2023 | GILBANE FAMILY FOUNDATION INC |
| JAMES D GREENHECK FOUNDATION INC | Private foundation | $3,359,881 | 1 | 1 | 2025–2025 | INTELLIGENT FUTURE FOUNDATION |
| SORENSON LEGACY FOUNDATION | Private foundation | $1,231,752 | 2 | 1 | 2019–2021 | JOAN AND TIM FENTON FAMILY FOUNDATION |
| FOUNDATION TO PROMOTE OPEN SOCIETY | Private foundation | $250,000 | 1 | 1 | 2023–2023 | ARSENAULT 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 · $3,188,352 spent · pay $0 · grants $2,850,500 · events $0
| Line | As described | Total | Share |
|---|---|---|---|
| Contributions, gifts, grants paid | $2,850,500 | 89.4% | |
| Other expenses | $250,096 | 7.8% | |
| Taxes | $84,600 | 2.7% | |
| Fees: accounting | $1,200 | 0.0% | |
| Fees: other professional | $950 | 0.0% | |
| Fees: legal | $910 | 0.0% | |
| Interest | $96 | 0.0% | |
| Total | $3,188,352 | 100% |
2023 · Form 990PF · $2,928,737 spent · pay $0 · grants $2,515,167 · events $0
| Line | As described | Total | Share |
|---|---|---|---|
| Contributions, gifts, grants paid | $2,515,167 | 85.9% | |
| Other expenses | $344,100 | 11.7% | |
| Taxes | $67,000 | 2.3% | |
| Fees: other professional | $2,170 | 0.1% | |
| Fees: legal | $300 | 0.0% | |
| Total | $2,928,737 | 100% |
2022 · Form 990PF · $2,921,475 spent · pay $0 · grants $2,492,633 · events $2,196
| Line | As described | Total | Share |
|---|---|---|---|
| Contributions, gifts, grants paid | $2,492,633 | 85.3% | |
| Other expenses | $284,826 | 9.7% | |
| Taxes | $113,182 | 3.9% | |
| Fees: other professional | $28,638 | 1.0% | |
| Travel, conferences and meetings | $2,196 | 0.1% | |
| Total | $2,921,475 | 100% |
2021 · Form 990PF · $2,268,468 spent · pay $0 · grants $1,867,590 · events $26,939
| Line | As described | Total | Share |
|---|---|---|---|
| Contributions, gifts, grants paid | $1,867,590 | 82.3% | |
| Other expenses | $301,613 | 13.3% | |
| Taxes | $52,600 | 2.3% | |
| Travel, conferences and meetings | $26,939 | 1.2% | |
| Fees: other professional | $19,726 | 0.9% | |
| Total | $2,268,468 | 100% |
2020 · Form 990PF · $2,531,492 spent · pay $62,765 · grants $2,072,764 · events $1,180
| Line | As described | Total | Share |
|---|---|---|---|
| Contributions, gifts, grants paid | $2,072,764 | 81.9% | |
| Other expenses | $195,033 | 7.7% | |
| Taxes | $141,700 | 5.6% | |
| Fees: other professional | $56,883 | 2.2% | |
| Other salaries and wages | $47,292 | 1.9% | |
| Pension plans and employee benefits | $15,473 | 0.6% | |
| Travel, conferences and meetings | $1,180 | 0.0% | |
| Interest | $1,050 | 0.0% | |
| Printing and publications | $117 | 0.0% | |
| Total | $2,531,492 | 100% |
2012 · Form 990PF · $1,185,539 spent · pay $0 · grants $1,027,100 · events $0
| Line | As described | Total | Share |
|---|---|---|---|
| Contributions, gifts, grants paid | $1,027,100 | 86.6% | |
| Taxes | $62,564 | 5.3% | |
| Other expenses | $61,793 | 5.2% | |
| Fees: other professional | $30,119 | 2.5% | |
| Fees: legal | $2,728 | 0.2% | |
| Interest | $1,235 | 0.1% | |
| Total | $1,185,539 | 100% |
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