Nonprofit · EIN 39-6093915
OPTIMIST INTERNATIONAL
Also known as 23140 OC OF GREEN BAY PREBLE WI
Tax-exempt · LUXEMBURG, WI 54217
Address and contacts
- Address (IRS master file)
- N8913NCOUNTY RD DK, LUXEMBURG, WI 54217-0000
- In care of
- % DAVID CHARLES JR
- Mailing address (990-N for 2024)
- 2525 COUNTY ROAD ZZ, DE PERE WI 54115
- Principal officer (990-N for 2024)
- DAVE SIELSKI, 2525 COUNTY ROAD ZZ, DE PERE WI 54115
What it must file and when
IRS records say it files Form 990-N (e-Postcard). Gross receipts normally $50,000 or less. 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-N on file |
| 2023 | September 30, 2024 | February 18, 2025 | 990-N on file |
IRS record
- EIN
- 39-6093915
- Tax-exempt status
- 501(c)(4): Social welfare organization
- Donations deductible
- No
- Exempt since
- 1966
- Accounting year ends
- September
- Files
- Form 990-N (e-Postcard)
- Group exemption
- 1334: OPTIMIST INTERNATIONAL
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990-N for 2024 Officer: DAVE SIELSKI | September 30, 2025 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-N for 2023 Officer: DAVE SIELSKI | September 30, 2024 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-N for 2022 Officer: Chris Boland | September 30, 2023 | ≤ $50,000 receipts | – | – | e-Postcard |
| 990-EZ | September 2022 | – | – | – | IRS |
| 990-EZ | September 2021 | – | – | – | IRS |
| 990 | September 2020 | – | – | – | IRS |
| 990 | September 2019 | – | – | – | IRS |
| 990 | September 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 39-6093915).
Questions about OPTIMIST INTERNATIONAL
- What is the EIN of OPTIMIST INTERNATIONAL?
- The employer identification number (EIN) of OPTIMIST INTERNATIONAL is 39-6093915.
- Is OPTIMIST INTERNATIONAL tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(4) since 1966.
- Are donations to OPTIMIST INTERNATIONAL tax-deductible?
- No. The IRS master file says contributions to it are not deductible.
- Which annual return does OPTIMIST INTERNATIONAL file?
- Form 990-N (e-Postcard). Gross receipts normally $50,000 or less.
- When is the next return of OPTIMIST INTERNATIONAL 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 OPTIMIST INTERNATIONAL last file with the IRS?
- The latest return in the IRS public files is the 990-N for 2024 for the year ended September 30, 2025.
- Who is the principal officer of OPTIMIST INTERNATIONAL?
- The 990-N for 2024 names DAVE SIELSKI.
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- KEWAUNEE COUNTY ECONOMIC DEVELOPMENT CORPORATION EIN 72-1565048 · last filed 990 for 2024
- BOARD OF REGENTS OF THE UNIVERSITY OF WISCONSIN SYSTEM EIN 39-1661525 · last filed 990-EZ for 2025
- LAKESHORE LUTHERANS FOR LIFE EIN 39-1631235 · last filed 990-N for 2024