Nonprofit · EIN 34-1878939
RATTLESNAKE ISLAND CLUB INC
Tax-exempt · PORT CLINTON, OH 43452
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $1,921,032 | $2,255,662 | -$334,630 | $6,784,563 | $3,321,762 | $3,462,801 |
| December 31, 2024 | 990 | $2,401,159 | $2,816,102 | -$414,943 | $7,235,761 | $3,546,659 | $3,689,102 |
| December 31, 2023 | 990 | $1,773,928 | $1,788,661 | -$14,733 | $7,278,514 | $3,151,902 | $4,126,612 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $0
- Program service revenue
- $1,126,752
- Investment income
- $41
- Net income from sales of inventory
- $770,868
- Other revenue
- $794,239
Expenses
- Grants and similar amounts paid
- $0
- Other salaries and wages
- $624,188
- Salaries, compensation and benefits (total)
- $742,227
- Professional fundraising fees
- $0
- Legal fees
- $480
- Accounting fees
- $50,000
- Occupancy
- $347,593
- Travel
- $7,675
- Depreciation
- $430,781
- Program services (functional)
- $1,750,847
- Management and general (functional)
- $504,815
Balance sheet and other
- Total assets, start of year
- $7,235,761
- Total assets, end of year
- $6,784,563
- Total liabilities, end of year
- $3,321,762
- Net assets, end of year
- $3,462,801
- Land, buildings and equipment
- $6,423,614
- Net assets without donor restrictions
- $3,462,801
- Gross receipts
- $2,211,060
- Employees
- 24
- Year formed
- 1998
- State of legal domicile
- OH
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 for the year ended December 31, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| CHARLES KOCH | CHAIRMAN Trustee or director | 1 | $0 |
| MARK LYDEN | TREASURER Trustee or director | 1 | $0 |
| MICHAEL NEEDLER | DIRECTOR Trustee or director | 1 | $0 |
| ROBERT M SERPENTNI | PRESIDENT Officer | 1 | $0 |
| JAMES TESAR | VICE PRESIDE Officer | 1 | $0 |
990 for the year ended December 31, 2024: 5 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| CHARLES KOCH | CHAIRMAN Trustee or director | 1 | $0 |
| MARK LYDEN | TREASURER Trustee or director | 2 | $0 |
| MICHAEL NEEDLER | DIRECTOR Trustee or director | 1 | $0 |
| ROBERT M SERPENTNI | PRESIDENT Officer | 1 | $0 |
| JAMES TESAR | VICE PRESIDE Officer | 1 | $0 |
990 for the year ended December 31, 2023: 5 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| CHARLES KOCH | CHAIRMAN Trustee or director | – | $0 |
| MARK LYDEN | DIRECTOR Trustee or director | – | $0 |
| JAMES TESAR | DIRECTOR Trustee or director | – | $0 |
| THOMAS MCDONALD | VICE PRESIDE Officer | – | $0 |
| ROBERT M SERPENTNI | PRESIDENT Officer | – | $0 |
Address and contacts
- Address (IRS master file)
- PO BOX 549, PORT CLINTON, OH 43452-0549
- In care of
- % THOMAS MCDONALD
- Principal officer (990 for 2025)
- MARK LYDEN, 10346 BRECKSVILLE RD, BRECKSVILLE, OH 44141
- Signed the 990
- MARK LYDEN, TREASURER
- Phone
- (419) 285-2861
- Return prepared by
- SODERBERG AND BRENNER CPAS LLC
Mission
PRIVATE SOCIAL, RECREATIONAL AND BOATING CLUB
Program accomplishments
- THE CLUB OPERATES A CLUB FACILITY FOR ITS MEMBERS AND THEIR GUESTS CONSISTING OF A RESTAURANT, LODGING, BAR & POOL AREA, GIFT SHOP, GOLF COURSE, AND BOATING MARINAExpenses $2,040,875 · revenue $2,187,648
- COST OF OCCUPANCY OF FACILITIES LOCATED ON GROUNDS
What it must file and when
IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. 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 on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990 on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990 on file |
IRS record
- EIN
- 34-1878939
- Tax-exempt status
- 501(c)(7): Social or recreational club
- Donations deductible
- No
- Exempt since
- 2000
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Recreation and sports (N99)
- Assets (IRS master file)
- $6,784,563
- Income (IRS master file)
- $2,211,060
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $1,921,032 | $2,255,662 | $6,784,563 | XML |
| 990 | December 2024 | $2,401,159 | $2,816,102 | $7,235,761 | XML |
| 990 | December 2023 | $1,773,928 | $1,788,661 | $7,278,514 | XML |
| 990 | December 2022 | $1,481,005 | $1,412,193 | $5,444,249 | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | IRS |
| 990 | 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 34-1878939).
Questions about RATTLESNAKE ISLAND CLUB INC
- What is the EIN of RATTLESNAKE ISLAND CLUB INC?
- The employer identification number (EIN) of RATTLESNAKE ISLAND CLUB INC is 34-1878939.
- Is RATTLESNAKE ISLAND CLUB INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(7) since 2000.
- Are donations to RATTLESNAKE ISLAND CLUB INC tax-deductible?
- No. The IRS master file says contributions to it are not deductible.
- Which annual return does RATTLESNAKE ISLAND CLUB INC file?
- Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
- When is the next return of RATTLESNAKE ISLAND CLUB INC 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 RATTLESNAKE ISLAND CLUB INC last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended December 2025.
- Who is the principal officer of RATTLESNAKE ISLAND CLUB INC?
- The 990 for the year ended December 31, 2025 names MARK LYDEN.
- Who are the officers and directors of RATTLESNAKE ISLAND CLUB INC?
- The 990 for the year ended December 31, 2025 lists 5 people; 0 received compensation from the organization.
- How much revenue does RATTLESNAKE ISLAND CLUB INC have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $1,921,032, expenses of $2,255,662 and total assets of $6,784,563 at year end.
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