Nonprofit · EIN 99-4031209
RHOMBUS FOUNDATION
Tax-exempt · WILMINGTON, DE 19809
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-PF | $28,088 | $358,872 | -$330,784 | $649,477 | $0 | $649,477 |
| December 31, 2024 | 990-PF | $999,511 | $19,250 | $980,261 | $980,261 | $0 | $980,261 |
Financial details: 990-PF for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $0
- Interest
- $28,088
Expenses
- Grants and similar amounts paid
- $333,500
- Compensation of officers, directors and key employees
- $0
- Disbursements for charitable purposes
- $358,782
- Excise tax on investment income
- $390
Balance sheet and other
- Total assets, start of year
- $980,261
- Total assets, end of year
- $649,477
- Total liabilities, end of year
- $0
- Net assets, end of year
- $649,477
- Fair market value of assets
- $649,477
- Qualifying distributions
- $358,782
- Net investment income
- $28,088
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 |
|---|---|---|---|
| Omotunde AJ Mahoney Foundation Source 501 Silverside Rd, Wilmington, DE 198091377 | Responsible Party, Pres, Dir, | 1 | $0 |
990-PF for the year ended December 31, 2024: 1 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Omotunde AJ Mahoney Foundation Source 501 Silverside Rd, Wilmington, DE 198091377 | Pres, Dir, Sec, Treas | 1 | $0 |
Address and contacts
- Address (IRS master file)
- FOUNDATION SOURCE 501 SILVERSIDE RD, WILMINGTON, DE 19809-0000
- In care of
- % FOUNDATION SOURCE
- Signed the 990-PF
- OMOTUNDE MAHONEY, PRESIDENT
- Phone
- (800) 839-1754
- Return prepared by
- Foundation Source
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 | Check at the IRS |
IRS record
- EIN
- 99-4031209
- 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
- 2025
- Accounting year ends
- December
- Files
- Form 990-PF
- Category (NTEE)
- Philanthropy, voluntarism and grantmaking foundations (T22)
- Assets (IRS master file)
- $649,477
- Income (IRS master file)
- $28,088
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-PF | December 2025 | $28,088 | $358,872 | $649,477 | XML |
| 990-PF | December 2024 | $999,511 | $19,250 | $980,261 | 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 99-4031209).
Questions about RHOMBUS FOUNDATION
- What is the EIN of RHOMBUS FOUNDATION?
- The employer identification number (EIN) of RHOMBUS FOUNDATION is 99-4031209.
- Is RHOMBUS FOUNDATION tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2025.
- Are donations to RHOMBUS FOUNDATION tax-deductible?
- Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
- Which annual return does RHOMBUS FOUNDATION file?
- Form 990-PF. Private foundations file every year.
- When is the next return of RHOMBUS 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 RHOMBUS 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 RHOMBUS FOUNDATION?
- The 990-PF for the year ended December 31, 2025 lists 1 person; 0 received compensation from the organization.
- How much revenue does RHOMBUS FOUNDATION have?
- On its 990-PF for the year ended December 31, 2025 it reported revenue of $28,088, expenses of $358,872 and total assets of $649,477 at year end.
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All nonprofits in WILMINGTON · Delaware · Philanthropy, voluntarism and grantmaking foundations