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Each tax year counts once: when a return was amended, only the latest return for that period is used below (superseded returns stay listed, greyed, under Finances).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

NameLatest titleYearsHrs/wk (latest)CompensationOrganizations
Karen M Stone Dir2012-2024 1 $0 reported 2
Michael R Stone Pres, Dir, Sec2012-2024 1 $0 reported 2

People by year

2024 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Karen M Stone Dir1 $0-$0 $02
Michael R Stone Pres, Dir, Sec1 $0-$0 $02
2023 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Karen M Stone Dir1 $0-$0 $02
Michael R Stone Pres, Dir, Sec1 $0-$0 $02
2022 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Karen M Stone Dir1 $0-$0 $02
Michael R Stone Pres, Dir, Sec1 $0-$0 $02
2021 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Karen M Stone Dir1 $0-$0 $02
Michael R Stone Pres, Dir, Sec1 $0-$0 $02
2020 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Karen M Stone Dir1 $0-$0 $02
Michael R Stone Pres, Dir, Sec1 $0-$0 $02
2012 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
Karen M Stone Dir1 $0-- $02
Michael R Stone Pres / Dir / Sec1 $0-- $02

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
#ContributorTypeCity, stateTotalNoncashSource
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
#ContributorTypeCity, stateTotalNoncashSource
1 Stone Map Atlas Foundation Person Wilmington, DE $2,900,000- Form 990PF Sch. B, 2023 · filing
2021 · 3 contributors · $4.6M
#ContributorTypeCity, stateTotalNoncashSource
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
#ContributorTypeCity, stateTotalNoncashSource
2 Ellis Stephen and Karen Person Piedmont, CA $125,000- Form 990PF Sch. B, 2020 · filing
1 Chorengel Maya Person Oakland, CA $10,000- Form 990PF Sch. B, 2020 · filing
3 Gilbertson Scott Person San Francisco, CA $10,000- Form 990PF Sch. B, 2020 · filing
2012 · 1 contributor · $1.2M
#ContributorTypeCity, stateTotalNoncashSource
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.

RevenueExpensesAssetsNet assetsContributionsProgram revenueOfficer payEmployeesVolunteers
2024 · Form 990PF period ending 2024-12-31 · view filing · original 990 ↗
$8,436,567$3,188,352 $63,312,311$63,312,311 $2,314,750- $0--
2023 · Form 990PF period ending 2023-12-31 · view filing · original 990 ↗
$7,963,655$2,928,737 $58,068,172$58,068,172 $2,900,000- $0--
2022 · Form 990PF period ending 2022-12-31 · view filing · original 990 ↗
$5,790,242$2,921,475 $53,031,828$53,031,828 $0- $0--
2021 · Form 990PF period ending 2021-12-31 · view filing · original 990 ↗
$11,619,305$2,268,468 $50,162,061$50,162,061 $4,596,538- $0--
2020 · Form 990PF period ending 2020-12-31 · view filing · original 990 ↗
$3,388,001$2,531,492 $40,811,224$40,811,224 $145,000- $0--
2012 · Form 990PF period ending 2012-12-31 · view filing · original 990 ↗
$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.

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

GrantorTypeMatchYears givenGrantsTotalLatest yearLatest year's amountGrants
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)

OrganizationStateNTEELatest revenueLatest expensesTop-paid titleTop payWhy similar
PRICE 4 FAMILY FOUNDATION INCDET22 $7,932,252$0 DIRECTOR$0 Same NTEE code T22, revenue within 2x, same state
WHITCOMB FAMILY FOUNDATION INCDET22 $12,139,483$4,854,098 Dir$0 Same NTEE code T22, revenue within 2x, same state
GERRI AND RICH WONG FAMILY FOUNDATIONDET22 $7,073,093$4,174,752 Dir, Pres$0 Same NTEE code T22, revenue within 2x, same state
JOHN AND JULIE SCHMIDT FAMILY FOUNDATIONDET22 $10,840,131$668,773 VP$0 Same NTEE code T22, revenue within 2x, same state
PINCUS FAMILY FOUNDATIONDET22 $8,146,451$7,637,741 PRES/CEO$337,699 Same NTEE code T22, revenue within 2x, same state
SIERRA PINE FAMILY FOUNDATIONDET22 $5,306,196$377,405 Dir, Pres$0 Same NTEE code T22, revenue within 2x, same state
KELLEHER FAMILY FOUNDATIONDET22 $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 INCDET22 $13,669,684$48,423 Dir, Treas$0 Same NTEE code T22, revenue within 2x, same state
TEETS FAMILY FOUNDATIONDET22 $10,287,712$14,763 Dir$0 Same NTEE code T22, revenue within 2x, same state
MACKENZIE FAMILY FOUNDATIONDET22 $10,579,175$6,882,357 Dir$0 Same NTEE code T22, revenue within 2x, same state
THE S LEE FAMILY FOUNDATIONDET22 $5,938,262$30,261 Sec, Treas$0 Same NTEE code T22, revenue within 2x, same state
WOODY FAMILY FOUNDATIONDET22 $5,810,610$8,000 Dir, Sec, Treas$0 Same NTEE code T22, revenue within 2x, same state
SCHUESSLER FAMILY FOUNDATIONDET22 $8,497,734$1,138,832 Dir, Pres, Sec, Treas$0 Same NTEE code T22, revenue within 2x, same state
REYNOLDS FAMILY FOUNDATIONDET22 $6,978,908$3,695,221 Trustee$0 Same NTEE code T22, revenue within 2x, same state
JAY FARNER FAMILY FOUNDATIONDET22 $12,552,069$620,519 Pres, Dir$0 Same NTEE code T22, revenue within 2x, same state
MARILYN J DAKIN FAMILY FOUNDATIONDET22 $14,666,087$314,626 Dir, Pres, Treas, Sec$58,500 Same NTEE code T22, revenue within 2x, same state
BRENT AND KATHRYN WOOD FOUNDATIONDET22 $7,814,114$1,682,350 Trustee$0 Same NTEE code T22, revenue within 2x, same state
CHRISTOPHER ROBERT FAMILY FOUNDATIONDET22 $10,870,635$8,878,612 Dir, Pres, Sec, Treas$0 Same NTEE code T22, revenue within 2x, same state
ACAHAND FOUNDATIONDET22 $5,466,075$4,653,987 PROGRAM OFFICER$126,824 Same NTEE code T22, revenue within 2x, same state
CARL M FREEMAN FOUNDATION INCDET22 $6,510,449$6,400,740 EXECUTIVE DIRECTOR$151,551 Same NTEE code T22, revenue within 2x, same state
THE CHRISTOPHER M BARNETT FAMILY FOUNDATIONDET22 $8,327,670$1,057,019 Dir, Pres, Chair$0 Same NTEE code T22, revenue within 2x, same state
THE RAATT DEJONG FAMILY FOUNDATIONDET22 $15,147,039$285,085 Dir, Pres, Sec, Treas$0 Same NTEE code T22, revenue within 2x, same state
ANAM FOUNDATIONDET22 $9,055,749$117,278 Dir, Pres, Sec$0 Same NTEE code T22, revenue within 2x, same state
RETRIEVER UNLEASHED FAMILY FOUNDATIONDET22 $6,002,500$2,500 Dir, Pres$0 Same NTEE code T22, revenue within 2x, same state
XIAOHONG AND WEI ZHU FOUNDATIONDET22 $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).

GrantorTypeTotal givenGrantsOrganizations fundedYearsWhich ones
THE GILBANE FAMILY FOUNDATION Private foundation$7,338,9921 12023–2023 GILBANE FAMILY FOUNDATION INC
JAMES D GREENHECK FOUNDATION INC Private foundation$3,359,8811 12025–2025 INTELLIGENT FUTURE FOUNDATION
SORENSON LEGACY FOUNDATION Private foundation$1,231,7522 12019–2021 JOAN AND TIM FENTON FAMILY FOUNDATION
FOUNDATION TO PROMOTE OPEN SOCIETY Private foundation$250,0001 12023–2023 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
LineAs describedTotalShare
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$3,188,352100%

View the filing

2023 · Form 990PF · $2,928,737 spent · pay $0 · grants $2,515,167 · events $0
LineAs describedTotalShare
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$2,928,737100%

View the filing

2022 · Form 990PF · $2,921,475 spent · pay $0 · grants $2,492,633 · events $2,196
LineAs describedTotalShare
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$2,921,475100%

View the filing

2021 · Form 990PF · $2,268,468 spent · pay $0 · grants $1,867,590 · events $26,939
LineAs describedTotalShare
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$2,268,468100%

View the filing

2020 · Form 990PF · $2,531,492 spent · pay $62,765 · grants $2,072,764 · events $1,180
LineAs describedTotalShare
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$2,531,492100%

View the filing

2012 · Form 990PF · $1,185,539 spent · pay $0 · grants $1,027,100 · events $0
LineAs describedTotalShare
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$1,185,539100%

View the filing

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