Nonprofit · EIN 47-1925405
WILLIAM C & SUSAN S MARINER PRIVATE FOUNDATION
Tax-exempt · OCEAN CITY, MD 21843
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| November 30, 2025 | 990-PF | $859,900 | $12,000 | $847,900 | $5,814,721 | $0 | $5,814,721 |
| November 30, 2024 | 990-PF | $441,600 | $12,000 | $429,600 | $4,966,821 | $0 | $4,966,821 |
| November 30, 2023 | 990-PF | $3,153,474 | $10,000 | $3,143,474 | $4,537,221 | $0 | $4,537,221 |
Financial details: 990-PF for the year ended November 30, 2025
Revenue
- Contributions, gifts and grants
- $859,900
Expenses
- Grants and similar amounts paid
- $12,000
- Disbursements for charitable purposes
- $12,000
Balance sheet and other
- Total assets, start of year
- $4,966,821
- Total assets, end of year
- $5,814,721
- Total liabilities, end of year
- $0
- Net assets, end of year
- $5,814,721
- Fair market value of assets
- $14,210,737
- Qualifying distributions
- $12,000
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-PF for the year ended November 30, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| WILLIAM C MARINER 6735 RUM POINT LANE, BERLIN, MD 21811 | PRES/TREAS | 1 | $0 |
| SUSAN S MARINER 6735 RUM POINT LANE, BERLIN, MD 21811 | V.P./SECRETA | 1 | $0 |
990-PF for the year ended November 30, 2024: 2 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| WILLIAM C MARINER 6735 RUM POINT LANE, BERLIN, MD 21811 | PRES/TREAS | 1 | $0 |
| SUSAN S MARINER 6735 RUM POINT LANE, BERLIN, MD 21811 | V.P./SECRETA | 1 | $0 |
990-PF for the year ended November 30, 2023: 2 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| WILLIAM C MARINER 6735 RUM POINT LANE, BERLIN, MD 21811 | PRES/TREAS | 0 | $0 |
| SUSAN S MARINER 6735 RUM POINT LANE, BERLIN, MD 21811 | V.P./SECRETA | 0 | $0 |
Address and contacts
- Address (IRS master file)
- PO BOX 611, OCEAN CITY, MD 21843-0611
- In care of
- % WILLIAM C MARINER
- Signed the 990-PF
- WILLIAM C MARINER, PRES/TREAS
- Phone
- (410) 641-4036
What it must file and when
IRS records say it files Form 990-PF. Private foundations file every year. Its accounting year ends in November, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2024 | November 30, 2025 | April 15, 2026 | 990-PF on file |
| 2023 | November 30, 2024 | April 15, 2025 | 990-PF on file |
| 2022 | November 30, 2023 | April 15, 2024 | 990-PF on file |
IRS record
- EIN
- 47-1925405
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Private non-operating foundation
- Donations deductible (Pub 78)
- Private foundation, 30% limit
- Exempt since
- 2015
- Accounting year ends
- November
- Files
- Form 990-PF
- Category (NTEE)
- Philanthropy, voluntarism and grantmaking foundations (T20)
- Assets (IRS master file)
- $5,814,721
- Income (IRS master file)
- $859,900
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-PF | November 2025 | $859,900 | $12,000 | $5,814,721 | XML |
| 990-PF | November 2024 | $441,600 | $12,000 | $4,966,821 | XML |
| 990-PF | November 2023 | $3,153,474 | $10,000 | $4,537,221 | XML |
| 990-PF | November 2022 | – | – | – | IRS |
| 990-PF | November 2021 | – | – | – | IRS |
| 990-PF | November 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 47-1925405).
Questions about WILLIAM C & SUSAN S MARINER PRIVATE FOUNDATION
- What is the EIN of WILLIAM C & SUSAN S MARINER PRIVATE FOUNDATION?
- The employer identification number (EIN) of WILLIAM C & SUSAN S MARINER PRIVATE FOUNDATION is 47-1925405.
- Is WILLIAM C & SUSAN S MARINER PRIVATE FOUNDATION tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2015.
- Are donations to WILLIAM C & SUSAN S MARINER PRIVATE FOUNDATION tax-deductible?
- Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
- Which annual return does WILLIAM C & SUSAN S MARINER PRIVATE FOUNDATION file?
- Form 990-PF. Private foundations file every year.
- When is the next return of WILLIAM C & SUSAN S MARINER PRIVATE FOUNDATION due?
- The return for tax year 2025 (the year ending November 30, 2026) is due April 15, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did WILLIAM C & SUSAN S MARINER PRIVATE FOUNDATION last file with the IRS?
- The latest return in the IRS public files is the 990-PF for the year ended November 2025.
- Who are the officers and directors of WILLIAM C & SUSAN S MARINER PRIVATE FOUNDATION?
- The 990-PF for the year ended November 30, 2025 lists 2 people; 0 received compensation from the organization.
- How much revenue does WILLIAM C & SUSAN S MARINER PRIVATE FOUNDATION have?
- On its 990-PF for the year ended November 30, 2025 it reported revenue of $859,900, expenses of $12,000 and total assets of $5,814,721 at year end.
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