Castilleja School Foundation
Castilleja school educates motivated young women to become confident thinkers & compassionate leaders with a sense of purpose to effect change in the world. To prepare our students for the wider world, we infuse our challenging college preparatory program with a global curriculum that fosters awareness, compassion, and engagement with issues beyond castilleja. Our comprehensive academic program and extensive co-curricularofferings develop in each student the self-confidence to reach her full potential. Above all, our faculty and staff dedicate themselves to excellence in educating young women and in cultivating young leaders.
Castilleja School Foundation at a glance
- Total assets
- $316,977,746
- +77.3% vs 2024
- Revenue (2025)
- $55,547,071
- +60.9% vs 2024
- Net investment income (2025)
- $3,185,132
- +49.5% vs 2024
- Expenses (2025)
- $37,116,560
- -2.7% vs 2024
- Latest 990 filing
- Form 990, 2025 View filing
Data from IRS Form 990, 2025; updated October 2026.
Who Castilleja School Foundation funds
How this funder distributes its grants
Grant Size Distribution
2 grants across all recorded years
The most common grant size was under $50K: 2 grants of 2 (100%).
Geographic Focus
Where this funder awards grants
Grant Distribution by State
States
Cities
How Castilleja School Foundation gives
- Giving held roughly steady from 2019 to 2022 (+1%). Method
From the foundation's IRS Form 990 filings. Methodology.
Giving History
Giving Over Time
Total grant dollars and number of grants per year
From 2019 to 2024, annual grant giving ranged from $1K (2024) to $26K (2020). In 2024 it reported $1K in grants paid, as a total without an itemized list.
Hatched bars: grants paid as reported on the IRS filing, which lists no individual grants for that year.
Grants by year
Grant recipients and amounts by year
| Recipient | Purpose | Amount |
|---|---|---|
| Community Legal Services in East Palo Alto East Palo Alto, CA | General Support | $22,082 |
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Financial History
Multi-year comparison from IRS filings
| Filing year | Total Assets | Revenue | Expenses | Grants paid | Grants | Net Investment Income |
|---|---|---|---|---|---|---|
| 2025 | $316,977,746 | $55,547,071 | $37,116,560 | — | — | $3,185,132 |
| 2024 | $178,781,730 | $34,531,603 | $38,164,715 | $1,146 | Total only | $2,130,253 |
| 2023 | $172,322,948 | $33,897,565 | $33,964,279 | $4,500 | Total only | $-609,856 |
| 2022 | $165,805,640 | $34,886,741 | $32,251,331 | $22,082 | 1 | $1,195,727 |
| 2021 | $171,095,193 | $35,900,953 | $29,516,391 | $20,674 | 1 | $2,811,250 |
| 2020 | $144,400,085 | $29,301,214 | $29,655,378 | $25,913 | 1 | $1,286,337 |
| 2019 | $143,452,970 | $37,102,372 | $29,606,100 | $21,850 | 1 | $1,557,879 |
"Total only": grants paid as reported on the IRS filing, which lists no individual grants for that year.
About Castilleja School Foundation
Based on IRS filings
Castilleja School Foundation is a public charity focused on Education, based in Palo Alto, CA. IRS filing data is available from 2019 through 2025. As of 2025, the organization holds $317.0M in total assets. Net investment income was $3.2M.
Focus Areas
Leadership & Key People
Officers and directors from IRS filings
Castilleja School Foundation is led by Zac Zeitlin, Chair since 2023 (on filings since 2021); 9 of 33 officers listed in 2025 are compensated.
Officers on the 2025 filing
Zac Zeitlin
Chair
Treasurer & Secretary → Chair, 2023
On filings since 2021
2 hrs/week
No compensation reported
Lindsay Louie
Alum Chair
On filings since 2024
2 hrs/week
No compensation reported
Gabrille McColgan
Director, Coll Counsel & Upper Sch Acad Pol
Director of College Counseling → Director of College Counseling & Upper School Academic, 2023
Director of College Counseling & Upper School Academic → Director, Coll Counsel & Upper Sch Acad Pol, 2024
On filings since 2021
40 hrs/week
$186K (2021) → $201K (2025)
Sung K. Kim
Advancement Director
Director of Advancement → Advancement Director, 2025
On filings since 2022
40 hrs/week
$219K (2022) → $307K (2025)
Susan Raymond
Director of Finance & Accounting
On filings since 2024
40 hrs/week
$175K (2024) → $195K (2025)
Claire Ledwith
Director of Admissions & Tuition Assistant
New on the 2025 filing
40 hrs/week
$149K (2025)
Mia Rocha
Trustee
On filings since 2020
2 hrs/week
No compensation reported
Steve Dowling
Trustee
On filings since 2020
2 hrs/week
No compensation reported
Andie Sobrato
Trustee
On filings since 2022
2 hrs/week
No compensation reported
Bob Kocher
Trustee
On filings since 2022
2 hrs/week
No compensation reported
Jennifer Newstead
Trustee
On filings since 2022
2 hrs/week
No compensation reported
Mahooya Dinda
Trustee
On filings since 2022
2 hrs/week
No compensation reported
Jamaica Kreps
Trustee
On filings since 2023
2 hrs/week
No compensation reported
Stephanie Chen
Trustee
On filings since 2023
2 hrs/week
No compensation reported
Alison Koo
Trustee
On filings since 2024
2 hrs/week
No compensation reported
Chi-Hua Chien
Trustee
On filings since 2024
2 hrs/week
No compensation reported
Megan Jones Bell
Trustee
On filings since 2024
2 hrs/week
No compensation reported
Mike Schroepfer
Trustee
On filings since 2024
2 hrs/week
No compensation reported
Nate Gallon
Trustee
On filings since 2024
2 hrs/week
No compensation reported
Raj Agrawal
Trustee
On filings since 2024
2 hrs/week
No compensation reported
Shweta Mehta
Trustee
On filings since 2024
2 hrs/week
No compensation reported
Ed Chan
Trustee
New on the 2025 filing
2 hrs/week
No compensation reported
Rachelle Doorley
Trustee
New on the 2025 filing
2 hrs/week
No compensation reported
Rah Mansoor
Trustee
New on the 2025 filing
2 hrs/week
No compensation reported
Suzanne O'Brien
Trustee
New on the 2025 filing
2 hrs/week
No compensation reported
Yidrienne Lai
Trustee
New on the 2025 filing
2 hrs/week
No compensation reported
Kathleen Z. Layendecker
Associate Hos for Finance & Ops
Associate Head of School, Director Finance & Ops → Acting Head of School, 2024
Acting Head of School → Associate Hos for Finance & Ops, 2025
On filings since 2019
40 hrs/week
$294K (2019) → $724K (2025)
Nanci Zabatta Kauffman
Former Hos
Head of School → Former Hos, 2024
On filings since 2019
$272K (2019) → $1.8M (2025)
Laura Zappas
Head of Middle School
On filings since 2024
40 hrs/week
$179K (2024) → $244K (2025)
Christina Gwin
Dean of Faculty
New on the 2025 filing
40 hrs/week
$199K (2025)
Julia Eells
Head of School
New on the 2025 filing
40 hrs/week
$471K (2025)
Odette Harris
Vice Chair
Trustee → Vice Chair, 2023
On filings since 2020
2 hrs/week
No compensation reported
Jeff Wong
Secretary & Treasurer
Trustee → Secretary & Treasurer, 2023
On filings since 2022
2 hrs/week
No compensation reported
Former officers (47)
- Former: Aileen Lee (2019–2024) — Trustee
- Former: Jill Lee (2019–2024) — Director of Admissions & Tuition Assistant
- Former: Sarah Sands (2019–2024) — Trustee
- Former: David Ko (2021–2024) — Trustee
- Former: Jennifer Carolan (2022–2024) — Trustee
- Former: Anne Gomez Rubin (2023–2024) — Head of Upper School
- Former: Jennifer Taylor-Mendoza (2023–2024) — Trustee
- Former: Nadia Johnson (2023–2024) — Assistant Head Curr & Committee
- Former: Tracy Watt (2024) — Trustee
- Former: Alyssa Rieder (2019–2023) — Trustee
- Former: Anjali Pichai (2019–2023) — Trustee
- Former: Eugenie Van Wynen (2019–2023) — Trustee
- Former: John Giannandrea (2019–2023) — Trustee
- Former: Amy Rao (2020–2023) — Trustee
- Former: Eric Temple (2021–2023) — Trustee
- Former: Venky Ganesan (2021–2023) — Trustee
- Former: Daniel Chapman (2022–2023) — Superintendent of Building & Grounds
- Former: Deborah Trilling (2022–2023) — Visual Arts Teacher
- Former: Amy Redell (2023) — Trustee
- Former: Ashley Chambers (2023) — Trustee
- Former: Elizabeth Yin (2019–2022) — Trustee
- Former: Jim Bean (2019–2022) — Trustee
- Former: Josee Band (2019–2022) — Director & New Campus Design for Learning
- Former: Mary Speiser (2019–2022) — Board Chair
- Former: Saima Hasan (2019–2022) — Trustee
- Former: Shanti Perkins (2020–2022) — Trustee
- Former: Hala Kurdi Cozadd (2022) — Trustee
- Former: Tiffany Silva (2022) — Trustee
- Former: Anne Cameron (2019–2021) — Head of Middle School
- Former: Cindy Goldberg (2019–2021) — Trustee
- Former: David Scott (2019–2021) — Trustee
- Former: Heidi Hopper (2019–2021) — Trustee
- Former: Ken Hirsch (2019–2021) — Trustee
- Former: Lori Goler (2019–2021) — Trustee
- Former: Theresia Gouw (2019–2021) — Trustee
- Former: Sue Kim (2020–2021) — Director of Advancement
- Former: David Merenbach (2019–2020) — Treasurer & Secretary
- Former: Jianming Yu (2019–2020) — Trustee
- Former: Jim Pickett (2019–2020) — Head of Upper School
- Former: Michele Kirsch (2019–2020) — Trustee
- Former: Tony Carrasco (2019–2020) — Trustee
- Former: Denise Pope (2019) — Trustee
- Former: Kathleen Tandy (2019) — Trustee
- Former: Mike Volpi (2019) — Trustee
- Former: Phil Yang (2019) — Trustee
- Former: Tesha Poe (2019) — Chief Adv Officer
- Former: Usha Nesamoney (2019) — Trustee
Data from IRS Form 990 filings, 2019–2025. "On filings since" is the earliest filing we hold that lists the person; hours are average hours per week as reported.
Compensation Overview
From 2025 IRS filing
The highest reported compensation on the 2025 filing was $1.8M, to Nanci Zabatta Kauffman (Former HOS). 9 officers or directors reported compensation on that filing.
Frequently asked questions about Castilleja School Foundation
How large is Castilleja School Foundation?
Castilleja School Foundation reported $317.0M in total assets on its 2025 IRS Form 990. Its revenue that year was $55.5M.
What is Castilleja School Foundation?
Castilleja School Foundation is a public charity focused on Education, based in Palo Alto, CA. It holds $317.0M in total assets as of 2025.
Where does Castilleja School Foundation operate?
Castilleja School Foundation has awarded grants in California.
What is Castilleja School Foundation's EIN?
Castilleja School Foundation's EIN (Employer Identification Number) is 94-0373222. IRS Form 990 filing data is available on this page for 2019–2025.
Data last updated October 2026. Sourced from IRS Form 990 filings.
Data update history
(8)
When this profile's IRS filing data changed on Grantable
- Updated Form 990 for fiscal year 2020 (received by the IRS February 23, 2021)
- Updated Form 990 for fiscal year 2021 (received by the IRS May 4, 2022)
- Updated Form 990 for fiscal year 2022 (received by the IRS October 9, 2023)
- Added Form 990 for fiscal year 2025 (received by the IRS May 8, 2026)
- Added Form 990 for fiscal year 2019 (received by the IRS May 7, 2020)
- Updated Form 990 for fiscal year 2023 (received by the IRS May 15, 2024)
- Updated Form 990 for fiscal year 2024 (received by the IRS May 14, 2025)
- IRS filings on file for fiscal years 2020–2024
Live grants for the work Castilleja School Foundation funds
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Castilleja School Foundation down — hundreds of funders to go?