Nonprofit · EIN 77-0560173
THE ROBERT AND DIANE WEISSMAN FOUNDATION
Tax-exempt · LOS ALTOS, CA 94024
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| September 30, 2025 | 990-PF | $465,686 | $113,227 | $352,459 | $1,737,656 | $0 | $1,737,656 |
| September 30, 2024 | 990-PF | $64,420 | $92,581 | -$28,161 | $1,385,195 | $0 | $1,385,195 |
Financial details: 990-PF for the year ended September 30, 2025
Revenue
- Dividends
- $28,819
- Interest
- $13,094
- Net gain from sales of assets
- $423,773
Expenses
- Grants and similar amounts paid
- $2,800
- Compensation of officers, directors and key employees
- $0
- Salaries, compensation and benefits (total)
- $0
- Disbursements for charitable purposes
- $103,128
- Excise tax on investment income
- $6,333
Balance sheet and other
- Total assets, start of year
- $1,385,195
- Total assets, end of year
- $1,737,656
- Total liabilities, end of year
- $0
- Net assets, end of year
- $1,737,656
- Fair market value of assets
- $2,398,882
- Qualifying distributions
- $103,128
- Net investment income
- $465,686
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 September 30, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Robert Weissman PO Box 3472, Los Altos, CA 94024 | President | 12 | $0 |
| Diane Weissman PO Box 3472, Los Altos, CA 94024 | Treasurer Secretary | 4 | $0 |
| Robert Weissman PO Box 3472, Los Altos, CA 94024 | Director | 12 | $0 |
| Diane Weissman PO Box 3472, Los Altos, CA 94024 | Director | 4 | $0 |
990-PF for the year ended September 30, 2024: 4 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Robert Weissman PO Box 3472, Los Altos, CA 94024 | President | 12 | $0 |
| Diane Weissman PO Box 3472, Los Altos, CA 94024 | Treasurer Secretary | 4 | $0 |
| Robert Weissman PO Box 3472, Los Altos, CA 94024 | Director | 12 | $0 |
| Diane Weissman PO Box 3472, Los Altos, CA 94024 | Director | 4 | $0 |
Address and contacts
- Address (IRS master file)
- PO BOX 3472, LOS ALTOS, CA 94024-0472
- In care of
- % DIANE WEISSMAN
- Signed the 990-PF
- Diane Weissman, Treasurer
- Phone
- (650) 855-4461
California records
California keeps its own records of charities and corporations. Search them by EIN 77-0560173 or by the name THE ROBERT AND DIANE WEISSMAN FOUNDATION.
- 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)
What it must file and when
IRS records say it files Form 990-PF. Private foundations file every year. Its accounting year ends in September, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | September 30, 2026 | February 16, 2027 | Not due yet |
| 2024 | September 30, 2025 | February 17, 2026 | 990-PF on file |
| 2023 | September 30, 2024 | February 18, 2025 | 990-PF on file |
IRS record
- EIN
- 77-0560173
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Private operating foundation
- Exempt since
- 2007
- Accounting year ends
- September
- Files
- Form 990-PF
- Category (NTEE)
- Philanthropy, voluntarism and grantmaking foundations (T20)
- Assets (IRS master file)
- $1,737,656
- Income (IRS master file)
- $1,093,159
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-PF | September 2025 | $465,686 | $113,227 | $1,737,656 | XML |
| 990-PF | September 2024 | $64,420 | $92,581 | $1,385,195 | XML |
| 990-PF | September 2023 | – | – | – | IRS |
| 990-PF | September 2022 | – | – | – | IRS |
| 990-PF | September 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 77-0560173).
Questions about THE ROBERT AND DIANE WEISSMAN FOUNDATION
- What is the EIN of THE ROBERT AND DIANE WEISSMAN FOUNDATION?
- The employer identification number (EIN) of THE ROBERT AND DIANE WEISSMAN FOUNDATION is 77-0560173.
- Is THE ROBERT AND DIANE WEISSMAN FOUNDATION tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 2007.
- Which annual return does THE ROBERT AND DIANE WEISSMAN FOUNDATION file?
- Form 990-PF. Private foundations file every year.
- When is the next return of THE ROBERT AND DIANE WEISSMAN FOUNDATION due?
- The return for tax year 2025 (the year ending September 30, 2026) is due February 16, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did THE ROBERT AND DIANE WEISSMAN FOUNDATION last file with the IRS?
- The latest return in the IRS public files is the 990-PF for the year ended September 2025.
- Who are the officers and directors of THE ROBERT AND DIANE WEISSMAN FOUNDATION?
- The 990-PF for the year ended September 30, 2025 lists 4 people; 0 received compensation from the organization.
- How much revenue does THE ROBERT AND DIANE WEISSMAN FOUNDATION have?
- On its 990-PF for the year ended September 30, 2025 it reported revenue of $465,686, expenses of $113,227 and total assets of $1,737,656 at year end.
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All nonprofits in LOS ALTOS · California · Philanthropy, voluntarism and grantmaking foundations