Nonprofit · EIN 51-0189216
SIDENER FOUNDATION
Tax-exempt · SAINT LOUIS, MO 63146
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990-PF | $313,003 | $188,878 | $124,125 | $2,402,070 | $0 | $2,402,070 |
| December 31, 2024 | 990-PF | $214,547 | $139,377 | $75,170 | $2,277,945 | $0 | $2,277,945 |
| December 31, 2023 | 990-PF | $106,036 | $118,548 | -$12,512 | $2,202,775 | $0 | $2,202,775 |
Financial details: 990-PF for the year ended December 31, 2025
Revenue
- Dividends
- $73,896
- Interest
- $15,019
- Net gain from sales of assets
- $224,088
Expenses
- Grants and similar amounts paid
- $160,000
- Disbursements for charitable purposes
- $160,000
- Excise tax on investment income
- $3,949
Balance sheet and other
- Total assets, start of year
- $2,277,945
- Total assets, end of year
- $2,402,070
- Total liabilities, end of year
- $0
- Net assets, end of year
- $2,402,070
- Fair market value of assets
- $3,009,549
- Qualifying distributions
- $160,000
- Net investment income
- $313,003
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 |
|---|---|---|---|
| LE Sidener II 20 Brookwood Rd, St Louis, MO 63131 | President | 5 | $0 |
| LE Sidener II 20 Brookwood Rd, St Louis, MO 63131 | Secretary | 5 | $0 |
| Jill Gray 18201 Wild Horse Manor Ct, Glencoe, MO 63038 | Treasurer | 5 | $0 |
| Cortney Sidener 1826 Manor Hill Road, St Louis, MO 63131 | Director | 5 | $0 |
990-PF for the year ended December 31, 2024: 3 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| LE Sidener II 20 Brookwood Rd, St Louis, MO 63131 | President | 5 | $0 |
| LE Sidener II 20 Brookwood Rd, St Louis, MO 63131 | Secretary | 5 | $0 |
| Jill Gray 18201 Wild Horse Manor Ct, Glencoe, MO 63038 | Treasurer | 5 | $0 |
990-PF for the year ended December 31, 2023: 3 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Roger Shannon 1504 Red Briar, High Ridge, MO 63049 | President | 5 | $0 |
| LE Sidener II 20 Brookwood Rd, St Louis, MO 63131 | Secretary | 5 | $0 |
| Jill Gray 18201 Wild Horse Manor Ct, Glencoe, MO 63038 | Treasurer | 5 | $0 |
Address and contacts
- Address (IRS master file)
- 1829 BORMAN CIRCLE DR, SAINT LOUIS, MO 63146-4136
- Signed the 990-PF
- Lawrence E Sidener II, President
- Phone
- (314) 991-0730
- Return prepared by
- Steven J Laux CPA
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
- 51-0189216
- 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
- 1976
- Accounting year ends
- December
- Files
- Form 990-PF
- Assets (IRS master file)
- $2,402,070
- Income (IRS master file)
- $1,001,352
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-PF | December 2025 | $313,003 | $188,878 | $2,402,070 | IRS |
| 990-PF | December 2024 | $214,547 | $139,377 | $2,277,945 | IRS |
| 990-PF | December 2023 | $106,036 | $118,548 | $2,202,775 | XML |
| 990-PF | December 2022 | – | – | – | IRS |
| 990-PF | December 2021 | – | – | – | IRS |
| 990-PF | December 2020 | – | – | – | IRS |
| 990-PF | December 2018 | – | – | – | 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 51-0189216).
Questions about SIDENER FOUNDATION
- What is the EIN of SIDENER FOUNDATION?
- The employer identification number (EIN) of SIDENER FOUNDATION is 51-0189216.
- Is SIDENER FOUNDATION tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1976.
- Are donations to SIDENER FOUNDATION tax-deductible?
- Yes. It is listed in IRS Publication 78 (Private foundation, 30% limit).
- Which annual return does SIDENER FOUNDATION file?
- Form 990-PF. Private foundations file every year.
- When is the next return of SIDENER 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 SIDENER 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 SIDENER FOUNDATION?
- The 990-PF for the year ended December 31, 2025 lists 4 people; 0 received compensation from the organization.
- How much revenue does SIDENER FOUNDATION have?
- On its 990-PF for the year ended December 31, 2025 it reported revenue of $313,003, expenses of $188,878 and total assets of $2,402,070 at year end.
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