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MARIN HORIZON SCHOOL INCORPORATED

EIN 94-2427732 MILL VALLEY, CA

Revenue 2024
$16,842,162
Expenses 2024
$14,532,644

Program services were 84.4% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
B24Z
Classification
2000
Street
305 MONTFORD AVE

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Mission and programs · 2024

Mission

WE GROUND STUDENTS IN A DEEP SENSE OF BELONGING SO THEY BECOME ENTHUSIASTIC LEARNERS, DEVELOP CONFIDENT VOICES, AND EMERGE AS BEACONS OF KINDNESS IN THEIR COMMUNITIES.

Activities or mission (Part I)

THE ORGANIZATION IS A MONTESSORI-INSPIRED, NON-PROFIT INDEPENDENT, CO-EDUCATIONAL SCHOOL SERVING CLOSE TO 300 CHILDREN FROM PRESCHOOL THROUGH 8TH GRADE FOUNDED IN 1977 BY A VISIONARY GROUP OF PARENTS AND TEACHERS, THE SCHOOL'S MISSION IS TO CHALLENGE STUDENTS TO BE SELF-RELIANT THINKERS AND LIFELONG LEARNERS, INSPIRE ACADEMIC EXCELLENCE, NURTURE STUDENTS' NATURAL LOVE OF LEARNING, AND ENCOURAGE THEM TO BE CONFIDENT INDIVIDUALS WHO ARE RESPONSIBLE TO EACH OTHER, THE COMMUNITY AND THE WORLD. THE SCHOOL IS GOVERNED BY A VOLUNTEER BOARD OF TRUSTEES COMPRISED OF PARENTS, FACULTY, ALUMNI, AND COMMUNITY MEMBERS.

  • MARIN HORIZON SCHOOL IS AN INDEPENDENT, COED DAY SCHOOL FOR STUDENTS IN TODDLER THROUGH GRADE 8. LOCATED IN MILL VALLEY, CALIFORNIA, OUR CURRICULUM IS DESIGNED TO INSPIRE STUDENTS TO EMBRACE CHALLENGES, THINK CRITICALLY, AND BECOME COMPASSIONATE ADVOCATES. WE PRIORITIZE CLASS SIZES TO ALLOW THE DEVELOPMENT OF EXCEPTIONAL TEACHER-STUDENT RELATIONSHIPS AND INDIVIDUALIZED ATTENTION. WITHIN OUR INCLUSIVE COMMUNITY, EVERY STUDENT IS SEEN, HEARD, AND VALUED, FOSTERING A SENSE OF OWNERSHIP OVER THEIR EDUCATION AND AN EXPLORATION OF THEIR UNIQUE INTERESTS.

    Expenses $12,260,038 · Grants $2,575,275 · Revenue $12,308,707

As filed on the 2024 return.

Officers and directors · 2024

As listed in Part VII of the 2024 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • BILL PERRINE

    HEAD OF SCHOOL

    Total calculated
    $429,947
    From this org
    $301,946
    From related orgs
    $0
    Other
    $128,001
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $301,946
    Bonus
    $0
    Other
    $0
    Deferred
    $16,393
    Nontaxable benefits
    $111,608
    Filer's total
    $429,947

  • JESSE PEARSON

    7/8TH LANG TEACHER, TRUSTEE

    Total calculated
    $127,738
    From this org
    $102,804
    From related orgs
    $0
    Other
    $24,934
    Hours/week
    40

  • KELLEY GALLARDO

    PRIMARY TEACHER, TRUSTEE

    Total calculated
    $104,076
    From this org
    $79,346
    From related orgs
    $0
    Other
    $24,730
    Hours/week
    40

  • PETER BRYAN

    CHAIR

    Total calculated
    $0
    Hours/week
    4

  • JEN COYNE

    VICE-CHAIR

    Total calculated
    $0
    Hours/week
    4

  • ROHIT AGARWAL

    SECRETARY

    Total calculated
    $0
    Hours/week
    1

  • RYAN STEVER

    TREASURER

    Total calculated
    $0
    Hours/week
    1

  • ANDY DAVIES

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1

  • BRETT FOLEY

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1

  • ASHLEY GOLDSMITH BUTTNER

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1

  • CHARMAINE HO

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1

  • MIRA KIM

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1

  • KRISTIN LUNNY

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1

  • LEXY LURIE

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1

  • ASHLEY MACDONALD

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1

  • TRIGG MCLEOD

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1

  • TATEM READ

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1

  • ELISABETH THURSTON FRASER

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1

  • ROSAMOND POPE-MEYER

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1

  • KATHRYN THOMPSON

    TRUSTEE

    Total calculated
    $0
    Hours/week
    1

  • DIANA GREENSTONE

    DIRECTOR OF FINANCE

    Total calculated
    $204,531
    From this org
    $177,000
    From related orgs
    $0
    Other
    $27,531
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $177,000
    Bonus
    $0
    Other
    $0
    Deferred
    $8,845
    Nontaxable benefits
    $18,686
    Filer's total
    $204,531

  • BEN FUSSINER

    DIRECTOR OF UPPER SCHOOL

    Total calculated
    $155,233
    From this org
    $113,761
    From related orgs
    $0
    Other
    $41,472
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $113,761
    Bonus
    $0
    Other
    $0
    Deferred
    $7,049
    Nontaxable benefits
    $34,423
    Filer's total
    $155,233

  • KATHLEEN HAZELTON-LEECH

    PRIMARY TEACHER

    Total calculated
    $154,757
    From this org
    $130,300
    From related orgs
    $0
    Other
    $24,457
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $130,300
    Bonus
    $0
    Other
    $0
    Deferred
    $6,555
    Nontaxable benefits
    $17,902
    Filer's total
    $154,757

  • MARY BISHOP

    DIRECTOR OF DEVELOPMENT

    Total calculated
    $150,824
    From this org
    $128,986
    From related orgs
    $0
    Other
    $21,838
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $128,986
    Bonus
    $0
    Other
    $0
    Deferred
    $6,729
    Nontaxable benefits
    $15,109
    Filer's total
    $150,824

  • VICTORIA HUERTA-MILLER

    DIRECTOR OF LOWER SCHOOL

    Total calculated
    $133,641
    From this org
    $117,847
    From related orgs
    $0
    Other
    $15,794
    Hours/week
    40

The first 25 listed. Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. A Schedule J breakdown is as filed: base pay, bonus, other, deferred compensation and nontaxable benefits from this organization, with any from related organizations beside each, and the filer's own total. It is shown with the Part VII listing of the same name on the same return. The form gives no key between the two, so that pairing is ours, and is marked matched by us. Earlier years are each on their own filing page.

Filings

  • 2024
    Revenue
    $16,842,162
    Expenses
    $14,532,644
    Contributions
    $3,717,245
    Grants paid
    $2,575,275
  • 2023
    Revenue
    $16,229,609
    Expenses
    $13,870,477
    Contributions
    $3,882,955
    Grants paid
    $2,639,920
  • 2022
    Revenue
    $13,678,794
    Expenses
    $12,849,645
    Contributions
    $2,630,719
    Grants paid
    $2,166,110

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

  • 2021 · 990

    Revenue
    $12,842,042
    Expenses
    $12,158,043
    Assets (EOY)
    $41,170,495

  • 2020 · 990

    Revenue
    $13,345,969
    Expenses
    $11,526,969
    Assets (EOY)
    $38,021,663

  • 2019 · 990

    Revenue
    $11,825,448
    Expenses
    $10,895,940
    Assets (EOY)
    $34,470,769

  • 2018 · 990

    Revenue
    $11,368,664
    Expenses
    $10,339,168
    Assets (EOY)
    $30,731,349

  • 2017 · 990

    Revenue
    $11,335,944
    Expenses
    $10,847,600
    Assets (EOY)
    $29,118,209

  • 2016 · 990

    Revenue
    $10,901,744
    Expenses
    $10,198,928
    Assets (EOY)
    $28,790,907

  • 2015 · 990

    Revenue
    $11,577,121
    Expenses
    $10,112,504
    Assets (EOY)
    $27,791,212

  • 2014 · 990

    Revenue
    $10,413,495
    Expenses
    $9,139,973
    Assets (EOY)
    $25,148,717

  • 2013 · 990

    Revenue
    $10,837,413
    Expenses
    $9,271,134
    Assets (EOY)
    $23,315,133

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all.

Grants made

No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.

Grants received

The 10 largest by cash amount. The API serves every itemized grant.

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Listed as of 13 October 2026, under deductibility PC.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.

What this page reflects

The registration facts above come from the IRS Business Master File published 13 October 2026 and read 26 October 2026, for every organization at once. Returns through tax year 2024, the newest we have parsed for this organization.