Nonprofit · EIN 13-6097034
MAD RIVER FOUNDATION
Tax-exempt · STAMFORD, CT 06904
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-PF | $155,226 | $148,936 | $6,290 | $871,095 | $0 | $871,095 |
| December 31, 2024 | 990-PF | $189,584 | $121,625 | $67,959 | $865,403 | $0 | $865,403 |
| December 31, 2023 | 990-PF | $46,099 | $112,356 | -$66,257 | $798,364 | $0 | $798,364 |
Financial details: 990-PF for the year ended December 31, 2025
Revenue
- Dividends
- $31,919
- Net gain from sales of assets
- $123,307
Expenses
- Grants and similar amounts paid
- $122,000
- Compensation of officers, directors and key employees
- $0
- Disbursements for charitable purposes
- $129,509
- Excise tax on investment income
- $1,949
Balance sheet and other
- Total assets, start of year
- $865,403
- Total assets, end of year
- $871,095
- Total liabilities, end of year
- $0
- Net assets, end of year
- $871,095
- Fair market value of assets
- $2,303,293
- Qualifying distributions
- $129,509
- Net investment income
- $155,226
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 December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| CAROLINE SPENCER PO BOX 155, WILLOWCREEK, MT 59760 | PRESIDENT | 0 | $0 |
| PARKER B ROCKEFELLER 80 BEACHSIDE DRIVE, VERO BEACH, FL 32963 | VICE PRESIDENT | 0 | $0 |
| GODFREY A ROCKEFELLER JR 290 TARPON AVENUE, BOCA GRANDE, FL 33921 | SECRETARY/TREASURER | 0 | $0 |
990-PF for the year ended December 31, 2024: 3 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| CAROLINE SPENCER PO BOX 155, WILLOWCREEK, MT 59760 | PRESIDENT | 0 | $0 |
| PARKER B ROCKEFELLER 80 BEACHSIDE DRIVE, VERO BEACH, FL 32963 | VICE PRESIDENT | 0 | $0 |
| GODFREY A ROCKEFELLER JR 290 TARPON AVENUE, BOCA GRANDE, FL 33921 | SECRETARY/TREASURER | 0 | $0 |
990-PF for the year ended December 31, 2023: 3 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| CAROLINE SPENCER PO BOX 155, WILLOWCREEK, MT 59760 | PRESIDENT | 0 | $0 |
| PARKER B ROCKEFELLER 80 BEACHSIDE DRIVE, VERO BEACH, FL 32963 | VICE PRESIDENT | 0 | $0 |
| GODFREY A ROCKEFELLER JR 290 TARPON AVENUE, BOCA GRANDE, FL 33921 | SECRETARY/TREASURER | 0 | $0 |
Address and contacts
- Address (IRS master file)
- PO BOX 1214, STAMFORD, CT 06904-1214
- Signed the 990-PF
- PARKER ROCKEFELLER, VICE PRESIDENT
- Phone
- (203) 237-2333
- Return prepared by
- BLAIR & POTTS PO BOX 1214
What it must file and when
IRS records say it files Form 990-PF. Private foundations file every year. 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-PF on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990-PF on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990-PF on file |
IRS record
- EIN
- 13-6097034
- 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
- 1963
- Accounting year ends
- December
- Files
- Form 990-PF
- Assets (IRS master file)
- $871,095
- Income (IRS master file)
- $31,919
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-PF | December 2025 | $155,226 | $148,936 | $871,095 | IRS |
| 990-PF | December 2024 | $189,584 | $121,625 | $865,403 | IRS |
| 990-PF | December 2023 | $46,099 | $112,356 | $798,364 | XML |
| 990-PF | December 2022 | – | – | – | IRS |
| 990-PF | December 2021 | – | – | – | 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 13-6097034).
Questions about MAD RIVER FOUNDATION
- What is the EIN of MAD RIVER FOUNDATION?
- The employer identification number (EIN) of MAD RIVER FOUNDATION is 13-6097034.
- Is MAD RIVER FOUNDATION tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1963.
- Are donations to MAD RIVER FOUNDATION tax-deductible?
- Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
- Which annual return does MAD RIVER FOUNDATION file?
- Form 990-PF. Private foundations file every year.
- When is the next return of MAD RIVER FOUNDATION 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 MAD RIVER FOUNDATION last file with the IRS?
- The latest return in the IRS public files is the 990-PF for the year ended December 2025.
- Who are the officers and directors of MAD RIVER FOUNDATION?
- The 990-PF for the year ended December 31, 2025 lists 3 people; 0 received compensation from the organization.
- How much revenue does MAD RIVER FOUNDATION have?
- On its 990-PF for the year ended December 31, 2025 it reported revenue of $155,226, expenses of $148,936 and total assets of $871,095 at year end.
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