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HAMILTON FAMILY FOUNDATION

Cite this

Plain text HAMILTON FAMILY FOUNDATION. Strategy Studio, nonprofit organization profile, tax years 2013–2024. https://strategystudio.org/org/205634026. Retrieved 2026-10-19.

APA Strategy Studio. (n.d.). HAMILTON FAMILY FOUNDATION [Nonprofit organization profile; tax years 2013–2024]. Retrieved October 19, 2026, from https://strategystudio.org/org/205634026

MLA “HAMILTON FAMILY FOUNDATION.” Strategy Studio, tax years 2013–2024, https://strategystudio.org/org/205634026. Accessed 19 Oct. 2026.

Retrieved 2026-10-19; covers tax years 2013–2024. Data: Strategy Studio, CC BY 4.0.

2024 · Form 990PF · revenue $168K · expenses $83K · assets $1.2M

EIN
20-5634026
Address
2360 MENDOCINO AVE A2317, SANTA ROSA, CA 95403-3153
NTEE code
T20
Subsection
501(c)(3)
Ruling year
2006
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Each tax year counts once: when a return was amended, only the latest return for that period is used below (superseded returns stay listed, greyed, under Finances).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 12 people listed on these returns reported compensation from the organization. They are listed below.

Officers and directors, no compensation reported

12 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
Susan Brin DIRECTOR, PRESIDENT & EXC DIRECTOR2020-2024 0 $0 reported 1
Mark Hamilton DIRECTOR, CFO2020-2024 0 $0 reported 1
Barbara Tamborski DIRECTOR2020-2024 0 $0 reported 1
Marie Hamilton DIRECTOR, CHAIRPERSON & SECRETARY2020-2024 0 $0 reported 1
Bernard Hamilton DIRECTOR2013-2024 0 $0 reported 1
Bernard Hamilton Thru Mid Oct 2019 (former) PRESIDENT2019 0 $0 reported 1
Carolyn Hamilton Thru Mid Oct 2019 (former) SECRETARY, CFO, DIRECTOR2019 0 $0 reported 1
Susan Brin Start Mid Oct 2019 (former) DIRECTOR, PRESIDENT & EXC DIRECTOR2019 0 $0 reported 1
Mark Hamilton Start Mid Oct 2019 (former) DIRECTOR, CFO2019 0 $0 reported 1
Barbara Tamborski Start Mid Oct 201 (former) DIRECTOR, SECRETARY2019 0 $0 reported 1
Marie Hamilton Start Mid Oct 2019 (former) DIRECTOR, CHAIRPERSON2019 0 $0 reported 1
Carolyn Hamilton (former) SECRETARY, CFO, DIRECTOR2013-2018 0 $0 reported 1

People by year

2024 · 5 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
SUSAN BRIN DIRECTOR, PRESIDENT & EXC DIRECTOR0 $0-$0 $01
MARK HAMILTON DIRECTOR, CFO0 $0-$0 $01
BARBARA TAMBORSKI DIRECTOR0 $0-$0 $01
MARIE HAMILTON DIRECTOR, CHAIRPERSON & SECRETARY0 $0-$0 $01
BERNARD HAMILTON DIRECTOR0 $0-$0 $01
2023 · 5 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
SUSAN BRIN DIRECTOR, PRESIDENT & EXC DIRECTOR0 $0-$0 $01
MARK HAMILTON DIRECTOR, CFO0 $0-$0 $01
BARBARA TAMBORSKI DIRECTOR0 $0-$0 $01
MARIE HAMILTON DIRECTOR, CHAIRPERSON & SECRETARY0 $0-$0 $01
BERNARD HAMILTON DIRECTOR0 $0-$0 $01
2022 · 5 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
SUSAN BRIN DIRECTOR, PRESIDENT & EXC DIRECTOR0 $0-$0 $01
MARK HAMILTON DIRECTOR, CFO0 $0-$0 $01
BARBARA TAMBORSKI DIRECTOR, SECRETARY0 $0-$0 $01
MARIE HAMILTON DIRECTOR, CHAIRPERSON0 $0-$0 $01
BERNARD HAMILTON DIRECTOR0 $0-$0 $01
2021 · 5 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
SUSAN BRIN DIRECTOR, PRESIDENT & EXC DIRECTOR0 $0-$0 $01
MARK HAMILTON DIRECTOR, CFO0 $0-$0 $01
BARBARA TAMBORSKI DIRECTOR, SECRETARY0 $0-$0 $01
MARIE HAMILTON DIRECTOR, CHAIRPERSON0 $0-$0 $01
BERNARD HAMILTON DIRECTOR0 $0-$0 $01
2020 · 5 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
SUSAN BRIN DIRECTOR, PRESIDENT & EXC DIRECTOR0 $0-$0 $01
MARK HAMILTON DIRECTOR, CFO0 $0-$0 $01
BARBARA TAMBORSKI DIRECTOR, SECRETARY0 $0-$0 $01
MARIE HAMILTON DIRECTOR, CHAIRPERSON0 $0-$0 $01
BERNARD HAMILTON DIRECTOR0 $0-$0 $01
2019 · 7 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
BERNARD HAMILTON THRU MID OCT 2019 PRESIDENT0 $0-$0 $01
CAROLYN HAMILTON THRU MID OCT 2019 SECRETARY, CFO, DIRECTOR0 $0-$0 $01
SUSAN BRIN START MID OCT 2019 DIRECTOR, PRESIDENT & EXC DIRECTOR0 $0-$0 $01
MARK HAMILTON START MID OCT 2019 DIRECTOR, CFO0 $0-$0 $01
BARBARA TAMBORSKI START MID OCT 201 DIRECTOR, SECRETARY0 $0-$0 $01
MARIE HAMILTON START MID OCT 2019 DIRECTOR, CHAIRPERSON0 $0-$0 $01
BERNARD HAMILTON DIRECTOR0 $0-$0 $01
2018 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
BERNARD HAMILTON PRESIDENT, DIRECTOR0 $0-$0 $01
CAROLYN HAMILTON SECRETARY, CFO, DIRECTOR0 $0-$0 $01
2017 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
BERNARD HAMILTON PRESIDENT, DIRECTOR0 $0-$0 $01
CAROLYN HAMILTON SECRETARY, CFO, DIRECTOR0 $0-$0 $01
2016 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
BERNARD HAMILTON President, Director0 $0-$0 $01
Carolyn Hamilton Secretary, CFO, Director0 $0-$0 $01
2015 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
BERNARD HAMILTON President, Director0 $0-$0 $01
Carolyn Hamilton Secretary, CFO, Director1 $0-$0 $01
2014 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
BERNARD HAMILTON PRESIDENT, DIRECTOR1 $0-$0 $01
CAROLYN HAMILTON SECRETARY, CFO, DIRECTOR3 $0-$0 $01
2013 · 2 people listed · none paid
NameTitleHrs/wkFrom orgFrom relatedOtherTotalOrgs
BERNARD HAMILTON PRESIDENT, DIRECTOR1 $0-$0 $01
CAROLYN HAMILTON SECRETARY, CFO, DIRECTOR3 $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 · 9 grants to organizations · $68K
2023 · 6 grants to organizations · $60K
2022 · 7 grants to organizations · $90K
2021 · 8 grants to organizations · $100K
2020 · 6 grants to organizations · $60K
2019 · 8 grants to organizations · $55K
2017 · 7 grants to organizations · $46K
2016 · 10 grants to organizations · $46K
2015 · 1 grant to organizations · $2K
2014 · 14 grants to organizations · $39K
2013 · 14 grants to organizations · $43K

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 · $102K
#ContributorTypeCity, stateTotalNoncashSource
1 HAMILTON FAMILY TRUST Organization or other SANTA ROSA, CA $102,205$102,205 Form 990PF Sch. B, 2024 · filing
2023 · 1 contributor · $53K
#ContributorTypeCity, stateTotalNoncashSource
1 HAMILTON FAMILY TRUST Organization or other SANTA ROSA, CA $53,060$53,060 Form 990PF Sch. B, 2023 · filing
2022 · 1 contributor · $184K
#ContributorTypeCity, stateTotalNoncashSource
1 HAMILTON FAMILY TRUST Organization or other SANTA ROSA, CA $184,488$184,488 Form 990PF Sch. B, 2022 · filing
2021 · 1 contributor · $100K
#ContributorTypeCity, stateTotalNoncashSource
1 HAMILTON FAMILY TRUST Organization or other ROHNERT PARK, CA $100,000- Form 990PF Sch. B, 2021 · filing
2018 · 2 contributors · $132K
#ContributorTypeCity, stateTotalNoncashSource
1 HAMILTON FAMILY TRUST Organization or other ROHNERT PARK, CA $67,270$67,270 Form 990PF Sch. B, 2018 · filing
2 HAMILTON FAMILY TRUST Organization or other ROHNERT PARK, CA $65,000- Form 990PF Sch. B, 2018 · filing
2017 · 1 contributor · $101K
#ContributorTypeCity, stateTotalNoncashSource
1 HAMILTON FAMILY TRUST Organization or other ROHNERT PARK, CA $101,135$101,135 Form 990PF Sch. B, 2017 · filing
2014 · 1 contributor · $50K
#ContributorTypeCity, stateTotalNoncashSource
1 HAMILTON FAMILY TRUST Person BEVERLY HILLS, CA $50,000- Form 990PF Sch. B, 2014 · filing
2013 · 1 contributor · $50K
#ContributorTypeCity, stateTotalNoncashSource
1 HAMILTON FAMILY TRUST Person $50,000- Form 990PF Sch. B, 2013 · 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 2025-03-31 · view filing · original 990 ↗
$168,209$83,290 $1,172,687$1,172,687 $102,205- $0--
2023 · Form 990PF period ending 2024-03-31 · view filing · original 990 ↗
$74,618$78,168 $1,132,289$1,087,016 $53,060- $0--
2022 · Form 990PF period ending 2023-03-31 · view filing · original 990 ↗
$193,707$102,527 $1,001,244$990,142 $184,488- $0--
2021 · Form 990PF period ending 2022-03-31 · view filing · original 990 ↗
$136,446$115,520 $941,132$941,132 $100,000- $0--
2020 · Form 990PF period ending 2021-03-31 · view filing · original 990 ↗
$118,422$72,750 $953,604$953,604 -- $0--
2019 · Form 990PF period ending 2020-03-31 · view filing · original 990 ↗
$39,483$68,643 $822,230$822,230 -- $0--
2018 · Form 990PF period ending 2019-03-31 · view filing · original 990 ↗
$160,850$12,176 $932,135$932,135 $132,270- $0--
2017 · Form 990PF period ending 2018-03-31 · view filing · original 990 ↗
$139,662$56,394 $778,615$778,615 $101,135- $0--
2016 · Form 990PF period ending 2017-03-31 · view filing · original 990 ↗
$8,369$55,544 $696,398$696,398 -- $0--
2015 · Form 990PF period ending 2016-03-31 · view filing · original 990 ↗
$42,629$13,602 $714,742$714,742 -- $0--
2014 · Form 990PF period ending 2015-03-31 · view filing · original 990 ↗
$96,405$51,422 $746,898$746,898 $50,000- $0--
2013 · Form 990PF period ending 2014-03-31 · view filing · original 990 ↗
$95,144$53,504 $721,830$721,830 $50,000- $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
SILTON FAMILY FOUNDATIONCAT20 $163,916$184,805 CHAIRPERSON/CEO$0 Same NTEE code T20, revenue within 2x, same state, similar name
HAURY FAMILY FOUNDATIONCAT20 $167,695$35,993 Founding Trustee$0 Same NTEE code T20, revenue within 2x, same state, similar name
HSI FAMILY FOUNDATIONCAT20 $165,570$136,207 Director$0 Same NTEE code T20, revenue within 2x, same state, similar name
FINCH FAMILY FOUNDATIONCAT20 $165,622$636,260 PRESIDENT$0 Same NTEE code T20, revenue within 2x, same state, similar name
CHANG FAMILY FOUNDATIONCAT20 $162,838$32,078 President$0 Same NTEE code T20, revenue within 2x, same state, similar name
SKEES FAMILY FOUNDATIONCAT20 $162,599$150,502 Pres/Dir$17,014 Same NTEE code T20, revenue within 2x, same state, similar name
MAIER FAMILY FOUNDATIONCAT20 $177,659$140,353 VICE PRESIDENT/TREASURER$0 Same NTEE code T20, revenue within 2x, same state, similar name
BREZZO FAMILY FOUNDATIONCAT20 $172,176$128,617 CFO$0 Same NTEE code T20, revenue within 2x, same state, similar name
BELLOWE FAMILY FOUNDATIONCAT20 $166,595$102,998 PRESIDENT$0 Same NTEE code T20, revenue within 2x, same state, similar name
WACHTER FAMILY FOUNDATIONCAT20 $163,662$441,860 PRESIDENT AND CHAIRMAN OF$0 Same NTEE code T20, revenue within 2x, same state, similar name
THE BROWN FAMILY FOUNDATIONCAT20 $176,466$99,525 PRESIDENT$0 Same NTEE code T20, revenue within 2x, same state, similar name
C R STEVENSON FAMILY FOUNDATIONCAT20 $176,821$151,487 CEO$0 Same NTEE code T20, revenue within 2x, same state, similar name
WEBBCRAFT FAMILY FOUNDATION INCCAT20 $175,556$225,990 EXECUTIVE DIRECTOR$20,000 Same NTEE code T20, revenue within 2x, same state, similar name
DF FOUNDATIONCAT20 $162,597$79,685 PRESIDENT$0 Same NTEE code T20, revenue within 2x, same state, similar name
YUNRUI LI FAMILY PRIVATE FOUNDATIONCAT20 $164,407$13,547 CEO$0 Same NTEE code T20, revenue within 2x, same state, similar name
HELEN & JACK MCCULLOUGH FAMILY FOUNDATIONCAT20 $167,832$95,586 Co-President$0 Same NTEE code T20, revenue within 2x, same state, similar name
SVS FOUNDATIONCAT20 $164,467$37,617 PRESIDENT$0 Same NTEE code T20, revenue within 2x, same state, similar name
SUPO FOUNDATIONCAT20 $171,614$684,547 FOUND. MGR$0 Same NTEE code T20, revenue within 2x, same state
VICKI AND LEWIS SOLMON FAMILY FOUNDATIONCAT20 $165,461$164,640 PRESIDENT$0 Same NTEE code T20, revenue within 2x, same state
DEL RE FOUNDATIONCAT20 $174,979$212,322 President$0 Same NTEE code T20, revenue within 2x, same state
SACCHI FOUNDATIONCAT20 $160,977$151,620 DIRECTOR, PRESIDENT$0 Same NTEE code T20, revenue within 2x, same state
THE FABALIS FOUNDATIONCAT20 $164,803$38,838 TRUSTEE$0 Same NTEE code T20, revenue within 2x, same state
SHADESTONE FOUNDATIONCAT20 $162,624$120,311 DIRECTOR$0 Same NTEE code T20, revenue within 2x, same state
STONEHAVEN FOUNDATIONCAT20 $160,469$170,967 PRESIDENT$0 Same NTEE code T20, revenue within 2x, same state
ITO FOUNDATION USACAT20 $168,915$563,461 SECRETARY/DIRECTOR$0 Same NTEE code T20, 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
MOXIE FOUNDATION Private foundation$1,050,0001 12020–2020 FUTURES UNBOUND
RASMUSSEN FOUNDATION Private foundation$316,9031 12013–2013 CHARLES AND PATRICIA RASMUSSEN FAMILY FOUNDATION
HOBAN FAMILY CHARITABLE FOUNDATION Private foundation$159,50010 12016–2022 WOOD FAMILY FOUNDATION
THE HARRY & JEANETTE WEINBERG FOUNDATION INC Private foundation$100,0002 12020–2021 WOOD FAMILY FOUNDATION
GARY SALTZ FOUNDATION INC Private foundation$95,0004 12020–2024 DILLON HENRY FOUNDATION
LEFKOFSKY FAMILY FOUNDATION Private foundation$55,0002 12018–2019 WOOD FAMILY FOUNDATION
JPMORGAN CHASE FOUNDATION Private foundation$27,70112 12012–2024 WOOD FAMILY FOUNDATION
TIMOTHY AND LISA ROBERTSON FOUNDATION Private foundation$25,0001 12024–2024 SKIP 1 CHARITIES INC
DRAPER AND KRAMER FOUNDATION Private foundation$17,5333 12015–2020 WOOD FAMILY FOUNDATION
BANK OF AMERICA CHARITABLE FOUNDATION INC Private foundation$16,2556 12012–2019 WOOD FAMILY FOUNDATION
NATHALIE C BATTS CHARITABLE TRUST LTD Private foundation$11,0001 12023–2023 SKIP 1 CHARITIES INC
FRANCES AND BENJAMIN BENENSON FOUNDATION INC Private foundation$10,0001 12023–2023 DILLON HENRY FOUNDATION
KATTEN MUCHIN ROSENMAN FOUNDATION INC Private foundation$10,0001 12022–2022 WOOD FAMILY FOUNDATION
TAMPICO FOUNDATION Private foundation$10,0001 12017–2017 WOOD FAMILY FOUNDATION
GRACE K AND WESLEY S ALPERT CHARITABLE FOUNDATION Private foundation$10,0001 12021–2021 WOOD FAMILY 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.

2024 · Form 990PF · $83,290 spent · pay $0 · grants $67,500 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $67,500 81.0%
Fees: other professional $11,196 13.4%
Fees: accounting $4,200 5.0%
Taxes $394 0.5%
Total$83,290100%

View the filing

2023 · Form 990PF · $78,168 spent · pay $0 · grants $60,000 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $60,000 76.8%
Fees: other professional $10,292 13.2%
Fees: accounting $4,300 5.5%
Taxes $3,396 4.3%
Other expenses $180 0.2%
Total$78,168100%

View the filing

2022 · Form 990PF · $102,527 spent · pay $0 · grants $90,000 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $90,000 87.8%
Fees: other professional $8,824 8.6%
Fees: accounting $2,975 2.9%
Taxes $600 0.6%
Other expenses $128 0.1%
Total$102,527100%

View the filing

2021 · Form 990PF · $115,520 spent · pay $0 · grants $100,000 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $100,000 86.6%
Fees: other professional $10,430 9.0%
Fees: accounting $2,900 2.5%
Taxes $2,190 1.9%
Total$115,520100%

View the filing

2020 · Form 990PF · $72,750 spent · pay $0 · grants $60,000 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $60,000 82.5%
Fees: other professional $9,427 13.0%
Fees: accounting $2,875 4.0%
Other expenses $360 0.5%
Taxes $88 0.1%
Total$72,750100%

View the filing

2019 · Form 990PF · $68,643 spent · pay $0 · grants $55,000 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $55,000 80.1%
Fees: other professional $8,893 13.0%
Fees: accounting $2,743 4.0%
Taxes $2,007 2.9%
Total$68,643100%

View the filing

2018 · Form 990PF · $12,176 spent · pay $0 · grants $0 · events $0
LineAs describedTotalShare
Fees: other professional $7,541 61.9%
Fees: accounting $2,575 21.1%
Taxes $2,060 16.9%
Total$12,176100%

View the filing

2017 · Form 990PF · $56,394 spent · pay $0 · grants $46,000 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $46,000 81.6%
Fees: other professional $7,409 13.1%
Fees: accounting $2,762 4.9%
Taxes $223 0.4%
Total$56,394100%

View the filing

2016 · Form 990PF · $55,544 spent · pay $0 · grants $46,000 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $46,000 82.8%
Other expenses $7,284 13.1%
Fees: accounting $1,237 2.2%
Taxes $1,023 1.8%
Total$55,544100%

View the filing

2015 · Form 990PF · $13,602 spent · pay $0 · grants $2,000 · events $0
LineAs describedTotalShare
Other expenses $8,972 66.0%
Fees: accounting $2,375 17.5%
Contributions, gifts, grants paid $2,000 14.7%
Taxes $255 1.9%
Total$13,602100%

View the filing

2014 · Form 990PF · $51,422 spent · pay $0 · grants $39,000 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $39,000 75.8%
Other expenses $10,012 19.5%
Fees: accounting $1,945 3.8%
Taxes $465 0.9%
Total$51,422100%

View the filing

2013 · Form 990PF · $53,504 spent · pay $0 · grants $42,750 · events $0
LineAs describedTotalShare
Contributions, gifts, grants paid $42,750 79.9%
Other expenses $8,952 16.7%
Fees: accounting $1,722 3.2%
Taxes $80 0.1%
Total$53,504100%

View the filing