Nonprofit · EIN 77-0053500
SOUTHERN MONO HISTORICAL SOCIETY
Tax-exempt · MAMMOTH LAKES, CA 93546
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-EZ | $11,421 | $70,956 | -$59,535 | $39,703 | $21,800 | $17,903 |
| December 31, 2024 | 990-EZ | $62,706 | $75,454 | -$12,748 | $80,661 | $1,800 | $78,861 |
| December 31, 2023 | 990-EZ | $117,576 | $77,582 | $39,994 | $98,409 | $6,800 | $91,609 |
| December 31, 2022 | 990-EZ | $73,434 | $87,850 | -$14,416 | $51,890 | $275 | $51,615 |
Financial details: 990-EZ for the year ended December 31, 2025
Revenue
- Investment income
- $1
- Net income from sales of inventory
- $11,420
Expenses
- Compensation of officers, directors and key employees
- $0
- Salaries, compensation and benefits (total)
- $52,859
- Professional fees and payments to contractors
- $5,748
- Occupancy
- $5,287
- Printing, publications and postage
- $107
- Other expenses
- $6,955
- Program services (functional)
- $48,046
Balance sheet and other
- Total assets, start of year
- $80,661
- Total assets, end of year
- $39,703
- Total liabilities, end of year
- $21,800
- Net assets, end of year
- $17,903
- Cash, savings and investments
- $1,503
- Land and buildings
- $33,152
- Gross receipts
- $11,448
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 December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Kevin Green | Director | 1 | $0 |
| Robert Joki | President & CEO | 2 | $0 |
| Tony Rojas | Director | 1 | $0 |
| DAN LYSTER | Director | 1 | $0 |
990-EZ for the year ended December 31, 2024: 4 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Kevin Green | Director | 1 | $0 |
| Robert Joki | President & CEO | 2 | $0 |
| Tony Rojas | Director | 1 | $0 |
| DAN LYSTER | Director | 1 | $0 |
990-EZ for the year ended December 31, 2023: 4 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Kevin Green | Director | 1 | $0 |
| Robert Joki | President & CEO | 2 | $0 |
| Tony Rojas | Director | 1 | $0 |
| DAN LYSTER | Director | 1 | $0 |
990-EZ for the year ended December 31, 2022: 4 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Kevin Green | Director | 1 | $0 |
| Robert Joki | President & CEO | 2 | $0 |
| Tony Rojas | Director | 1 | $0 |
| DAN LYSTER | Director | 1 | $0 |
Address and contacts
- Address (IRS master file)
- PO BOX 65, MAMMOTH LAKES, CA 93546-0065
- In care of
- % BILL SAUSER
- Mailing address (990-N for 2015)
- PO Box 65, Mammoth Lakes CA 93546
- Principal officer (990-N for 2015)
- Marianne O'Connor, PO Box 65, Mammoth Lakes CA 93546
- Signed the 990-EZ
- Robert Joki, President & CEO
- Phone
- (760) 934-6918
- Return prepared by
- Luxe Strategic Partners LLP
California records
California keeps its own records of charities and corporations. Search them by EIN 77-0053500 or by the name SOUTHERN MONO HISTORICAL SOCIETY.
- 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
HISTORICAL PRESERVATION AND EDUCATION
Program accomplishments
- HISTORICAL PRESERVATION AND EDUCATIONExpenses $48,046
What it must file and when
IRS records say it files Form 990-N (e-Postcard). Gross receipts normally $50,000 or less. 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-EZ on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990-EZ on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990-EZ on file |
IRS record
- EIN
- 77-0053500
- 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
- 1985
- Accounting year ends
- December
- Files
- Form 990-N (e-Postcard)
- Assets (IRS master file)
- $39,703
- Income (IRS master file)
- $11,448
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-EZ | December 2025 | $11,421 | $70,956 | $39,703 | XML |
| 990-EZ | December 2024 | $62,706 | $75,454 | $80,661 | XML |
| 990-EZ | December 2023 | $117,576 | $77,582 | $98,409 | XML |
| 990-EZ | December 2022 | $73,434 | $87,850 | $51,890 | XML |
| 990-EZ | December 2021 | – | – | – | IRS |
| 990-EZ | December 2020 | – | – | – | IRS |
| 990-EZ | December 2018 | – | – | – | IRS |
| 990-EZ | December 2017 | – | – | – | IRS |
| 990-N for 2015 Officer: Marianne O'Connor | December 31, 2015 | ≤ $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 77-0053500).
Questions about SOUTHERN MONO HISTORICAL SOCIETY
- What is the EIN of SOUTHERN MONO HISTORICAL SOCIETY?
- The employer identification number (EIN) of SOUTHERN MONO HISTORICAL SOCIETY is 77-0053500.
- Is SOUTHERN MONO HISTORICAL SOCIETY tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1985.
- Are donations to SOUTHERN MONO HISTORICAL SOCIETY tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does SOUTHERN MONO HISTORICAL SOCIETY file?
- Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
- When is the next return of SOUTHERN MONO HISTORICAL SOCIETY 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 SOUTHERN MONO HISTORICAL SOCIETY last file with the IRS?
- The latest return in the IRS public files is the 990-EZ for the year ended December 2025.
- Who is the principal officer of SOUTHERN MONO HISTORICAL SOCIETY?
- The 990-N for 2015 names Marianne O'Connor.
- Who are the officers and directors of SOUTHERN MONO HISTORICAL SOCIETY?
- The 990-EZ for the year ended December 31, 2025 lists 4 people; 0 received compensation from the organization.
- How much revenue does SOUTHERN MONO HISTORICAL SOCIETY have?
- On its 990-EZ for the year ended December 31, 2025 it reported revenue of $11,421, expenses of $70,956 and total assets of $39,703 at year end.
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