Nonprofit · EIN 95-1582650
LOS ANGELES ARBORETUM FOUNDATION INC
Tax-exempt · ARCADIA, CA 91007
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| June 30, 2025 | 990 | $5,753,954 | $5,454,203 | $299,751 | $7,254,106 | $1,890,705 | $5,363,401 |
| June 30, 2024 | 990 | $5,939,463 | $10,606,951 | -$4,667,488 | $7,239,992 | $2,298,556 | $4,941,436 |
| June 30, 2023 | 990 (amended) | $6,705,816 | $11,448,590 | -$4,742,774 | $10,885,450 | $991,002 | $9,894,448 |
| June 30, 2022 | 990 (amended) | $7,328,965 | $3,389,978 | $3,938,987 | $19,242,822 | $1,039,685 | $18,203,137 |
Financial details: 990 for the year ended June 30, 2025
Revenue
- Contributions, gifts and grants
- $3,416,561
- of which government grants
- $250,000
- Membership dues
- $1,675,334
- Program service revenue
- $1,572,920
- Investment income
- $168,530
- Net gain from sales of assets
- $70,219
- Net income from fundraising events
- $401,085
- Net income from sales of inventory
- $194,858
- Other revenue
- $595,943
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $825,033
- Other salaries and wages
- $1,525,206
- Salaries, compensation and benefits (total)
- $2,681,691
- Professional fundraising fees
- $0
- Occupancy
- $159,678
- Depreciation
- $26,022
- Program services (functional)
- $2,244,938
- Management and general (functional)
- $2,619,419
- Fundraising (functional)
- $589,846
Balance sheet and other
- Total assets, start of year
- $7,239,992
- Total assets, end of year
- $7,254,106
- Total liabilities, end of year
- $1,890,705
- Net assets, end of year
- $5,363,401
- Land, buildings and equipment
- $132,941
- Publicly traded securities
- $3,006,600
- Net assets without donor restrictions
- $4,021,757
- Net assets with donor restrictions
- $1,341,644
- Gross receipts
- $6,957,710
- Employees
- 113
- Volunteers
- 284
- Year formed
- 1947
- State of legal domicile
- CA
From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.
Officers, directors and key employees
As listed on the 990 for the year ended June 30, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| SYLVIA ROSENBERGER | CDO Officer | 40 | $162,797 | $21,000 |
| JENNIFER VAN STRALEN | CFO (TERM 11/2024) Officer | 40 | $151,440 | $8,500 |
| ZAID RAWAS | INTERIM CFO (12/24-6/25) Officer | 40 | $147,235 | $0 |
| MICHAEL DESPLAINES | CEO (TERM 7/2024) Officer | 40 | $141,846 | $0 |
| TIMOTHY LINDSAY | INTERIM CEO (8/24-2/25) Officer | 40 | $50,000 | $0 |
| ANNETTE CASTRO RAMIREZ | PRESIDENT Trustee or director, Officer | 1 | $0 | $0 |
| ROBERT BARNES | 1ST VICE PRESIDENT Trustee or director, Officer | 1 | $0 | $0 |
| JUSTIN HUTCHINGS | 2ND VICE PRESIDENT Trustee or director, Officer | 1 | $0 | $0 |
| JOHN TEGTMEYER | TREASURER Trustee or director, Officer | 1 | $0 | $0 |
| DONGMEI HUANG | SECRETARY Trustee or director, Officer | 1 | $0 | $0 |
| HSIAO-LING TING | TRUSTEE Trustee or director | 1 | $0 | $0 |
| MARISSA GOLDBERG | TRUSTEE Trustee or director | 1 | $0 | $0 |
| KATHLEEN ELLISON | TRUSTEE Trustee or director | 1 | $0 | $0 |
| HEIDI HOOD | TRUSTEE Trustee or director | 1 | $0 | $0 |
| DEBBIE ANDERSON | TRUSTEE Trustee or director | 1 | $0 | $0 |
9 more people on this return
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| MARIE CSETTE MD PHD | TRUSTEE Trustee or director | 1 | $0 |
| IMY DULAKE | TRUSTEE Trustee or director | 1 | $0 |
| MARRILEE FELLOWS | TRUSTEE Trustee or director | 1 | $0 |
| LACEY GOSTONY | TRUSTEE Trustee or director | 1 | $0 |
| ERICA HAHN | TRUSTEE Trustee or director | 1 | $0 |
| HARLAN IRVINE | TRUSTEE Trustee or director | 1 | $0 |
| AKIKO KOH | TRUSTEE Trustee or director | 1 | $0 |
| ILONA LINDEN | TRUSTEE Trustee or director | 1 | $0 |
| SU OH | CEO (START 3/2025) Officer | 40 | $0 |
990 for the year ended June 30, 2024: 24 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| JENNIFER VAN STRALEN | ADMINISTRATIVE OPERATIONS Officer | 40 | $153,907 | $7,105 |
| SYLVIA ROSENBERGER | CDO Officer | 40 | $127,773 | $13,476 |
| MICHAEL DESPLAINES | CEO Officer | 40 | $80,000 | $0 |
| ZAID RAWAS | ACTING CFO (START 01/24) Officer | 40 | $0 | $0 |
| ANNE CASTRO RAMIREZ | PRESIDENT Trustee or director, Officer | 1 | $0 | $0 |
| KATHLEEN ELLISON | VICE PRESIDENT Trustee or director, Officer | 1 | $0 | $0 |
| SEAN CAIN | TREASURER Trustee or director, Officer | 1 | $0 | $0 |
| HEIDI HOOD | SECRETARY Trustee or director, Officer | 1 | $0 | $0 |
| DEBBIE ANDERSON | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ROBERT BARNES | TRUSTEE Trustee or director | 1 | $0 | $0 |
| SUSANNE COHEN | TRUSTEE Trustee or director | 1 | $0 | $0 |
| MARIE CSETTE MD PHD | TRUSTEE Trustee or director | 1 | $0 | $0 |
| IMY DULAKE | TRUSTEE Trustee or director | 1 | $0 | $0 |
| MARRILEE FELLOWS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| LACEY GOSTONY | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ERICA HAHN | TRUSTEE Trustee or director | 1 | $0 | $0 |
| DONGMEI HUANG | TRUSTEE Trustee or director | 1 | $0 | $0 |
| JUSTIN HUTCHINGS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| HARLAN IRVINE | TRUSTEE Trustee or director | 1 | $0 | $0 |
| AKIKO KOH | TRUSTEE Trustee or director | 1 | $0 | $0 |
| LLONA LINDEN | TRUSTEE Trustee or director | 1 | $0 | $0 |
| VICTORIA STRATMAN | TRUSTEE Trustee or director | 1 | $0 | $0 |
| JOHN TEGTMEYER | TRUSTEE Trustee or director | 1 | $0 | $0 |
| BETSEY TYLER | TRUSTEE Trustee or director | 1 | $0 | $0 |
990 for the year ended June 30, 2023: 25 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| SYLVIA ROSENBERGER | CDD Officer | 40 | $152,692 | $6,000 |
| JENNIFER VAN STRALEN | CFO Officer | 40 | $126,409 | $6,000 |
| RICHARD SCHULHOF | CEO Officer | 40 | $37,155 | $0 |
| ANNE CASTRO RAMIREZ | PRESIDENT Trustee or director, Officer | 1 | $0 | $0 |
| KATHLEEN ELLISON | VICE PRESIDENT Trustee or director, Officer | 1 | $0 | $0 |
| SEAN CAIN | TREASURER Trustee or director, Officer | 1 | $0 | $0 |
| HEIDI HOOD | SECRETARY Trustee or director | 1 | $0 | $0 |
| DAN FOLIART | PAST PRESIDENT Trustee or director | 1 | $0 | $0 |
| BETSEY TYLER | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ERICA HAHN | TRUSTEE Trustee or director | 1 | $0 | $0 |
| IMY DULAKE | TRUSTEE Trustee or director | 1 | $0 | $0 |
| SUSAN KRANWINKLE | PAST PRESIDENT Trustee or director | 1 | $0 | $0 |
| CHARLES L SEITZ PH | TRUSTEE Trustee or director | 1 | $0 | $0 |
| GEORGE A BRUMDER | PAST PRESIDENT Trustee or director | 1 | $0 | $0 |
| JUSTIN HUTCHINGS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| GILBERT RESENDEZ | PAST PRESIDENT Trustee or director | 1 | $0 | $0 |
| BURKS L HAMNER | PAST PRESIDENT Trustee or director | 1 | $0 | $0 |
| CONNIE CHING | TRUSTEE Trustee or director | 1 | $0 | $0 |
| KENNETH D HILL PHD | PAST PRESIDENT Trustee or director | 1 | $0 | $0 |
| SUSANNE COHEN | TRUSTEE Trustee or director | 1 | $0 | $0 |
| MARIE CSETTE MD PHD | TRUSTEE Trustee or director | 1 | $0 | $0 |
| DONGMEI HUANG | TRUSTEE Trustee or director | 1 | $0 | $0 |
| JOHN TEGTMEYER | TRUSTEE Trustee or director | 1 | $0 | $0 |
| WILLIAM LINCOLN | PAST PRESIDENT Trustee or director | 1 | $0 | $0 |
| G ARNOLD MULDER | PAST PRESIDENT Trustee or director | 1 | $0 | $0 |
990 for the year ended June 30, 2022: 29 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| SYLVIA ROSENBERGER | CDD Officer | 40 | $147,660 | $9,350 |
| JENNIFER VAN STRALEN | CFO Officer | 40 | $109,493 | $0 |
| RICHARD SCHULHOF | CEO Officer | 40 | $39,219 | $0 |
| DAN FOLIART | PAST PRESIDENT Trustee or director | 1 | $0 | $0 |
| BETSEY TYLER | TRUSTEE Trustee or director | 1 | $0 | $0 |
| ERICA HAHN | TRUSTEE Trustee or director | 1 | $0 | $0 |
| IMY DULAKE | TRUSTEE Trustee or director | 1 | $0 | $0 |
| SUSAN KRANWINKLE | PAST PRESIDENT Trustee or director | 1 | $0 | $0 |
| CHARLES L SEITZ PHD | TRUSTEE Trustee or director | 1 | $0 | $0 |
| HEIDI HOOD | TRUSTEE Trustee or director | 1 | $0 | $0 |
| GEORGE A BRUMDER | PAST PRESIDENT Trustee or director | 1 | $0 | $0 |
| GILBERT RESENDEZ | PAST PRESIDENT Trustee or director | 1 | $0 | $0 |
| JUSTIN HUTCHINGS | TRUSTEE Trustee or director | 1 | $0 | $0 |
| G ARNOLD MULDER | PAST PRESIDENT Trustee or director | 1 | $0 | $0 |
| ROBERT BARNES | TRUSTEE Trustee or director | 1 | $0 | $0 |
| BURKS L HAMNER | PAST PRESIDENT Trustee or director | 1 | $0 | $0 |
| SUSANNE COHEN | TRUSTEE Trustee or director | 1 | $0 | $0 |
| DIANE GROHULSKI | TRUSTEE Trustee or director | 1 | $0 | $0 |
| CONNIE CHING | TRUSTEE Trustee or director | 1 | $0 | $0 |
| KENNETH D HILL PHD | PAST PRESIDENT Trustee or director | 1 | $0 | $0 |
| SUSANNE COHEN | TRUSTEE Trustee or director | 1 | $0 | $0 |
| MARIE CSETE MDPHD | TRUSTEE Trustee or director | 1 | $0 | $0 |
| DONGMEI HUANG | TRUSTEE Trustee or director | 1 | $0 | $0 |
| DIANA LEACH | TRUSTEE Trustee or director | 1 | $0 | $0 |
| JOHN TEGTMEYER | TRUSTEE Trustee or director | 1 | $0 | $0 |
| WILLIAM LINCOLN | PRESIDENT Trustee or director, Officer | 1 | $0 | $0 |
| KATHLEEN ELLISON | VICE PRESIDENT Trustee or director, Officer | 1 | $0 | $0 |
| ANNETTE CASTRO RAMIREZ | SECRETARY Trustee or director, Officer | 1 | $0 | $0 |
| SEAN CAIN | TREASURER Trustee or director, Officer | 1 | $0 | $0 |
Address and contacts
- Address (IRS master file)
- 301 N BALDWIN AVE, ARCADIA, CA 91007-2697
- In care of
- % HINTON KREDITOR & GRONROOS LLP
- Principal officer (990 for 2024)
- SU OH, 301 N BALDWIN AVENUE, ARCADIA, CA 91007
- Signed the 990
- SU OH, CEO
- Phone
- (626) 821-3231
- Website
- WWW.ARBORETUM.ORG
- Return prepared by
- CLIFTONLARSONALLEN LLP
California records
California keeps its own records of charities and corporations. Search them by EIN 95-1582650 or by the name LOS ANGELES ARBORETUM FOUNDATION INC.
- Attorney General, Registry of Charities and Fundraisers
- Registration status and filed reports (CT-TR-1, RRF-1)
- Secretary of State, bizfile Online
- Corporation status, entity number, agent for service
- Franchise Tax Board
- Entity status letter (state tax exemption, good standing)
Mission
TO CULTIVATE ITS NATURAL, HORTICULTURAL, AND HISTORIC RESOURCES FOR LEARNING, ENJOYMENT AND INSPIRATION. THE LOS ANGELES ARBORETUM FOUNDATION SECURES PHILANTHROPIC GIFTS IN SUPPORT OF THIS MISSION.
Program accomplishments
- HOME TO ONE OF THE WORLD'S FINEST COLLECTIONS OF MEDITERRANEAN AND SUBTROPICAL PLANTS, THE 127-ACRE LOS ANGELES COUNTY ARBORETUM & BOTANIC GARDEN SERVES AS AN IMPORTANT REPOSITORY FOR SPECIES OF BIOLOGICAL AND ECONOMIC IMPORTANCE. THE ARBORETUM LANDSCAPE ALSO SERVES AS A RICHHISTORICAL SITE THAT INCLUDES NATIVE AMERICAN, RANCHO PERIOD, AND LATE 19TH CENTURY TREASURES, INCLUDING FOUR HISTORIC LANDMARK BUILDINGS.IN AGREEMENT WITH LOS ANGELES COUNTY, THE FOUNDATION IS RESPONSIBLE FOR THE ADMISSIONS, FILMING, WEDDINGS AND SITE RENTALS. ADMISSIONS REVENUES HELP TO SUPPORT THE PROGRAMS OF THE LOS ANGELES COUNTY ARBORETUM & BOTANIC GARDEN.Expenses $1,754,145 · revenue $980,591
- IN ADDITION TO ITS EXTENSIVE VISITOR TOUR PROGRAM, THE LOS ANGELES COUNTY ARBORETUM & BOTANIC GARDEN OFFERS ACTIVITIES AND EVENTS THAT CATER TO EVERY AUDIENCE, SERVING OVER 500,000 VISITORS A YEAR. ADULT EDUCATION PROGRAMS PROVIDE INSTRUCTION IN HORTICULTURE, THE NATURAL SCIENCES, AND ENVIRONMENTAL STEWARDSHIP PRACTICES FOR USE IN HOME, SCHOOL, AND COMMUNITY GARDENS. SERVICES FOR PUBLIC SCHOOLS PROVIDE FIELD TRIPS AND OTHER SCIENCE AND HISTORY CURRICULA ENRICHMENT PROGRAMS TO OVER 18,000 STUDENTS ANNUALLY, WITH 70% VISITING FROM TITLE I SCHOOLS (WHERE AT LEAST 40% OF STUDENTS ARE FROM LOW-INCOME FAMILIES).Expenses $490,793 · revenue $993,414
What it must file and when
IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in June, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | June 30, 2026 | November 16, 2026 | Not due yet |
| 2024 | June 30, 2025 | November 17, 2025 | 990 on file |
| 2023 | June 30, 2024 | November 15, 2024 | 990 on file |
IRS record
- EIN
- 95-1582650
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Publicly supported organization (170(b)(1)(A)(vi))
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 1949
- Accounting year ends
- June
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Environment (C41I)
- Assets (IRS master file)
- $7,254,106
- Income (IRS master file)
- $6,957,710
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | June 2025 | $5,753,954 | $5,454,203 | $7,254,106 | XML |
| 990 | June 2024 | $5,939,463 | $10,606,951 | $7,239,992 | IRS |
| 990 | June 2023 | $6,705,816 | $11,448,590 | $10,885,450 | XML |
| 990 | June 2022 | $7,328,965 | $3,389,978 | $19,242,822 | XML |
| 990 | June 2021 | – | – | – | IRS |
| 990 | June 2020 | – | – | – | IRS |
| 990 | June 2019 | – | – | – | IRS |
| 990 | June 2018 | – | – | – | IRS |
990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 95-1582650).
Questions about LOS ANGELES ARBORETUM FOUNDATION INC
- What is the EIN of LOS ANGELES ARBORETUM FOUNDATION INC?
- The employer identification number (EIN) of LOS ANGELES ARBORETUM FOUNDATION INC is 95-1582650.
- Is LOS ANGELES ARBORETUM FOUNDATION INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1949.
- Are donations to LOS ANGELES ARBORETUM FOUNDATION INC tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does LOS ANGELES ARBORETUM FOUNDATION INC file?
- Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
- When is the next return of LOS ANGELES ARBORETUM FOUNDATION INC due?
- The return for tax year 2025 (the year ending June 30, 2026) is due November 16, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did LOS ANGELES ARBORETUM FOUNDATION INC last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended June 2025.
- Who is the principal officer of LOS ANGELES ARBORETUM FOUNDATION INC?
- The 990 for the year ended June 30, 2025 names SU OH.
- Who are the officers and directors of LOS ANGELES ARBORETUM FOUNDATION INC?
- The 990 for the year ended June 30, 2025 lists 24 people; 5 received compensation from the organization, the highest $162,797 (SYLVIA ROSENBERGER, CDO).
- How much revenue does LOS ANGELES ARBORETUM FOUNDATION INC have?
- On its 990 for the year ended June 30, 2025 it reported revenue of $5,753,954, expenses of $5,454,203 and total assets of $7,254,106 at year end.
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- HELEN AND WILL WEBSTER FOUNDATION EIN 95-4624483 · last filed 990-PF for 2024
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