Nonprofit · EIN 26-2460667
MARIN OPEN SPACE TRUST
Tax-exempt · SAN RAFAEL, CA 94913
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $127,747 | $86,850 | $40,897 | $686,723 | $0 | $686,723 |
| December 31, 2024 | 990 | $1,442,454 | $1,557,856 | -$115,402 | $646,311 | $0 | $646,311 |
| December 31, 2023 | 990 | $393,742 | $862,036 | -$468,294 | $765,250 | $3,951 | $761,299 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $108,141
- Program service revenue
- $0
- Investment income
- $19,606
- Other revenue
- $0
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $0
- Salaries, compensation and benefits (total)
- $0
- Professional fundraising fees
- $0
- Legal fees
- $2,365
- Program services (functional)
- $80,790
- Management and general (functional)
- $6,060
Balance sheet and other
- Total assets, start of year
- $646,311
- Total assets, end of year
- $686,723
- Total liabilities, end of year
- $0
- Net assets, end of year
- $686,723
- Net assets without donor restrictions
- $592,002
- Net assets with donor restrictions
- $94,721
- Gross receipts
- $127,747
- Employees
- 0
- Volunteers
- 7
- Year formed
- 2008
- 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 December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Steve Petterle | Director Trustee or director | 1 | $0 |
| Joyce Applen | Director Trustee or director | 1 | $0 |
| Don Dickenson | Director Trustee or director | 5 | $0 |
| William Long | Chair Trustee or director, Officer | 12 | $0 |
| Ann Thomas | Secretary-Treasurer Trustee or director, Officer | 4 | $0 |
| Jonathan Braun | Vice Chair Trustee or director, Officer | 15 | $0 |
| Kevin Knowles | Director Trustee or director | 4 | $0 |
990 for the year ended December 31, 2024: 6 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Steve Petterle | Director Trustee or director | 1 | $0 |
| Joyce Applen | Director Trustee or director | 1 | $0 |
| Don Dickenson | Director Trustee or director | 4 | $0 |
| William Long | Chair Officer | 12 | $0 |
| Ann Thomas | Secretary-Treasurer Officer | 6 | $0 |
| Jonathan Braun | Director Key employee | 15 | $0 |
990 for the year ended December 31, 2023: 6 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| William Long | Chair Trustee or director, Officer | 12 | $0 |
| Ann Thomas | Secretary-Treasurer Trustee or director, Officer | 6 | $0 |
| Steve Petterle | Director Trustee or director | 1 | $0 |
| Joyce Applen | Director Trustee or director | 1 | $0 |
| Jonathan Braun | Director Trustee or director | 25 | $0 |
| Don Dickenson | Director Trustee or director | 4 | $0 |
Address and contacts
- Address (IRS master file)
- PO BOX 4133, SAN RAFAEL, CA 94913-4133
- Mailing address (990-N for 2010)
- PO Box 4133, San Rafael CA 94913
- Principal officer (990 for 2025)
- william Long, 88 Bonnie Brae Drive, NOVATO, CA 94949
- Principal officer (990-N for 2010)
- William Long, 88 Bonnie Brae Drive, Novato CA 94949
- Signed the 990
- ANN THOMAS, Treasurer
- Phone
- (415) 884-2270
- Website
- www.marinopenspacetrust.org
California records
California keeps its own records of charities and corporations. Search them by EIN 26-2460667 or by the name MARIN OPEN SPACE TRUST.
- 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
Raise funds to acquire, restore, and protect open space and park lands in Marin County, California, and negotiate acquisitions of lands and conservation easements
Program accomplishments
- Completed remaining expenses, including establishing a restoration fund, for the 100-acre Wall property open space in Fairfax, California. The property was turned over to the Town of Fairfax for ownership with Marin County Parks and Open Space assuming responsibility for trails.Expenses $67,183 · grants $5,500
- Entered into a purchase and sales agreement, for purchase of a 7-acre hilltop knoll in Fairfax, California and bordering the Town of San Anselmo. The site is contiguous with adjoining open space. When transactions are completed the property would become part of the Marin County Open Space District.Expenses $8,365
- Monitoring of three conservation easements owned by MOST along with protection work at the 135-acre San Geronimo Commons easement. Work on San Geronimo easement involved salmonid habitat enhancement and flood plain restoration.Expenses $2,438
- Memberships with affiliated groups including the California Council of Land Trusts Land Trust Alliance and Together Bay Area.Expenses $2,804
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 December, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | December 31, 2025 | May 15, 2026 | 990 on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990 on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990 on file |
IRS record
- EIN
- 26-2460667
- 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
- 2010
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Environment (C34)
- Assets (IRS master file)
- $686,723
- Income (IRS master file)
- $127,747
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $127,747 | $86,850 | $686,723 | IRS |
| 990 | December 2024 | $1,442,454 | $1,557,856 | $646,311 | XML |
| 990 | December 2023 | $393,742 | $862,036 | $765,250 | XML |
| 990 | December 2022 | $1,237,432 | $223,032 | $1,228,103 | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | IRS |
| 990-N for 2010 Officer: William Long | December 31, 2010 | ≤ $50,000 receipts | – | – | e-Postcard |
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 26-2460667).
Questions about MARIN OPEN SPACE TRUST
- What is the EIN of MARIN OPEN SPACE TRUST?
- The employer identification number (EIN) of MARIN OPEN SPACE TRUST is 26-2460667.
- Is MARIN OPEN SPACE TRUST tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2010.
- Are donations to MARIN OPEN SPACE TRUST tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does MARIN OPEN SPACE TRUST 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 MARIN OPEN SPACE TRUST due?
- The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did MARIN OPEN SPACE TRUST last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended December 2025.
- Who is the principal officer of MARIN OPEN SPACE TRUST?
- The 990 for the year ended December 31, 2025 names william Long.
- Who are the officers and directors of MARIN OPEN SPACE TRUST?
- The 990 for the year ended December 31, 2025 lists 7 people; 0 received compensation from the organization.
- How much revenue does MARIN OPEN SPACE TRUST have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $127,747, expenses of $86,850 and total assets of $686,723 at year end.
Other nonprofits in SAN RAFAEL
- STRATEGIC ENERGY INNOVATIONS EIN 68-0404081 · last filed 990 for 2024
- INATURALIST EIN 92-1296468 · last filed 990 for 2025
- CALIFORNIAS FOR ENERGY INDEPENDENCE EIN 46-5063010 · last filed 990 for 2025
- AGRICULTURAL INSTITUTE OF MARIN EIN 86-1156712 · last filed 990 for 2024
- KOKUA HAWAII FOUNDATION EIN 20-0315475 · last filed 990 for 2025
- BUCKELEW COMMUNITY HOUSING DEVELOPMENT ORGANIZATION INC EIN 68-0440622 · last filed 990 for 2025
- MARIN CONSERVATION LEAGUE EIN 94-6089780 · last filed 990 for 2025
- ANOTHER RECLAIMED TREASURE FROM TRASH EIN 99-3111488 · last filed 990-EZ for 2025