Nonprofit · EIN 51-0178003
SAN MATEO ARBORETUM SOCIETY INC
Tax-exempt · SAN MATEO, CA 94401
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| June 30, 2025 | 990-EZ | $117,763 | $87,252 | $30,511 | $265,572 | $5,385 | $260,187 |
| June 30, 2024 | 990-EZ | $124,003 | $107,352 | $16,651 | $233,815 | $4,139 | $229,676 |
Financial details: 990-EZ for the year ended June 30, 2025
Revenue
- Contributions, gifts and grants
- $23,443
- Membership dues
- $4,118
- Program service revenue
- $5,336
- Investment income
- $2,290
- Net income from sales of inventory
- $58,140
- Other revenue
- $24,436
Expenses
- Compensation of officers, directors and key employees
- $0
- Professional fees and payments to contractors
- $7,187
- Printing, publications and postage
- $1,374
- Other expenses
- $78,691
- Program services (functional)
- $86,643
Balance sheet and other
- Total assets, start of year
- $233,815
- Total assets, end of year
- $265,572
- Total liabilities, end of year
- $5,385
- Net assets, end of year
- $260,187
- Cash, savings and investments
- $263,872
- Gross receipts
- $123,339
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-EZ for the year ended June 30, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Kevin Wilkinson | President/Director | 30 | $0 |
| Connie Mobley-Ritter | Treasurer / Director | 2 | $0 |
| Virginia Soletti | Director | 6 | $0 |
| Jennifer Hancox | Director | 6 | $0 |
| Gene Fleet | Director | 1 | $0 |
990-EZ for the year ended June 30, 2024: 8 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Kevin Wilkinson | President/Director | 30 | $0 |
| Linda Caswell | Secretary/Director | 1.26 | $0 |
| Cathy Steffen | Treasurer/Director | 20 | $0 |
| Virginia Soletti | Director | 1 | $0 |
| Irv Agard | Director | 1 | $0 |
| Robert Dahut | Director | 1 | $0 |
| Amanda Withrow | Director | 0.5 | $0 |
| Gene Fleet | Director | 1 | $0 |
Address and contacts
- Address (IRS master file)
- 101 9TH AVE, SAN MATEO, CA 94401-4202
- Signed the 990-EZ
- Kevin Wilkinson, President
- Phone
- (650) 579-0536
- Website
- www.sanmateoarboretum.org
- Return prepared by
- Sunshine Pro Accounting and Tax
California records
California keeps its own records of charities and corporations. Search them by EIN 51-0178003 or by the name SAN MATEO ARBORETUM SOCIETY 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
Horticultural Education
Program accomplishments
- The building is used for educational workshops on horticulture and water-wise gardening and is rented by the general public for special events and other educational seminars.Expenses $27,527
- Volunteers provides weeding, pruning, and on-going maintenance of the rose garden in central park. Volunteer programs are provided to teach participants rose maintenance to apply to private residential gardens. Additional activities include the maintenance of the walking paths and plant sales through the Kohl Pumphouse Gardens.Expenses $52,765
- Monthly programs and workshops featuring horticultural experts, educational workshops with hands-on learning regularly supports 20 35 attendees monthly. All volunteer supported activity is supported by at least 685 volunteer hours per year.Expenses $6,351
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-EZ on file |
| 2023 | June 30, 2024 | November 15, 2024 | 990-EZ on file |
IRS record
- EIN
- 51-0178003
- 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
- 1976
- Accounting year ends
- June
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Environment (C410)
- Assets (IRS master file)
- $265,572
- Income (IRS master file)
- $123,339
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-EZ | June 2025 | $117,763 | $87,252 | $265,572 | IRS |
| 990-EZ | June 2024 | $124,003 | $107,352 | $233,815 | XML |
| 990-EZ | June 2023 | – | – | – | IRS |
| 990-EZ | June 2022 | – | – | – | IRS |
| 990-EZ | June 2021 | – | – | – | IRS |
| 990-EZ | June 2020 | – | – | – | 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 51-0178003).
Questions about SAN MATEO ARBORETUM SOCIETY INC
- What is the EIN of SAN MATEO ARBORETUM SOCIETY INC?
- The employer identification number (EIN) of SAN MATEO ARBORETUM SOCIETY INC is 51-0178003.
- Is SAN MATEO ARBORETUM SOCIETY INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1976.
- Are donations to SAN MATEO ARBORETUM SOCIETY INC tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does SAN MATEO ARBORETUM SOCIETY 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 SAN MATEO ARBORETUM SOCIETY 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 SAN MATEO ARBORETUM SOCIETY INC last file with the IRS?
- The latest return in the IRS public files is the 990-EZ for the year ended June 2025.
- Who are the officers and directors of SAN MATEO ARBORETUM SOCIETY INC?
- The 990-EZ for the year ended June 30, 2025 lists 5 people; 0 received compensation from the organization.
- How much revenue does SAN MATEO ARBORETUM SOCIETY INC have?
- On its 990-EZ for the year ended June 30, 2025 it reported revenue of $117,763, expenses of $87,252 and total assets of $265,572 at year end.
Other nonprofits in SAN MATEO
- SUSTAINABLE SAN MATEO COUNTY EIN 48-1265207 · last filed 990 for 2025
- ORCHID CONSERVATION ALLIANCE EIN 20-2382586 · last filed 990 for 2025
- GREEN APPLE FOUNDATION INC EIN 84-4023622 · last filed 990-PF for 2025
- SAN MATEO GARDEN CENTER EIN 23-7222141 · last filed 990-EZ for 2024
- CLEANING CALI FOUNDATION INC EIN 33-2726857 · last filed 990-N for 2024
- GET DIRTY EIN 81-3915868 · last filed 990 for 2025
- NUOC SOLUTIONS EIN 92-2802906 · last filed 990-N for 2025
- EVERFLOW SANCTUARY EIN 33-4413969 · last filed 990-N for 2025