Nonprofit · EIN 23-7067946
INTERNATIONAL AEROBATIC CLUB INC
Also known as IAC Chapter 1
Tax-exempt · OSHKOSH, WI 54902
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| February 28, 2026 | 990 | $479,516 | $446,598 | $32,918 | $559,465 | $259,907 | $299,558 |
| February 28, 2025 | 990 | $402,066 | $435,696 | -$33,630 | $516,925 | $250,285 | $266,640 |
| February 29, 2024 | 990 | $373,452 | $433,122 | -$59,670 | $542,783 | $242,513 | $300,270 |
| February 28, 2023 | 990 | $353,702 | $443,273 | -$89,571 | $588,703 | $228,763 | $359,940 |
Financial details: 990 for the year ended February 28, 2026
Revenue
- Contributions, gifts and grants
- $130,202
- Program service revenue
- $311,575
- Investment income
- $13,370
- Net rental income
- -$10,045
- Net income from fundraising events
- $400
- Net income from sales of inventory
- $14,596
- Other revenue
- $24,369
Expenses
- Grants and similar amounts paid
- $7,172
- Compensation of officers, directors and key employees
- $60,072
- Salaries, compensation and benefits (total)
- $67,672
- Professional fundraising fees
- $0
- Legal fees
- $166
- Accounting fees
- $3,380
- Occupancy
- $2,241
- Travel
- $18,769
- Depreciation
- $3,507
- Program services (functional)
- $355,227
- Management and general (functional)
- $91,371
Balance sheet and other
- Total assets, start of year
- $516,925
- Total assets, end of year
- $559,465
- Total liabilities, end of year
- $259,907
- Net assets, end of year
- $299,558
- Land, buildings and equipment
- $27,724
- Net assets without donor restrictions
- $215,726
- Net assets with donor restrictions
- $83,832
- Gross unrelated business income
- $19,414
- Gross receipts
- $514,600
- Employees
- 1
- Volunteers
- 169
- Year formed
- 1970
- State of legal domicile
- WI
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 February 28, 2026, highest compensation first.
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| TIM DAHNKE | EXECUTIVE DIRECTOR Officer | 40 | $59,725 | $5,817 |
| JAMES BOURKE | PRESIDENT Trustee or director, Officer | 10 | $0 | $0 |
| ROB HOLLAND | VICE PRESIDENT (THRU 04/25) Trustee or director, Officer | 10 | $0 | $0 |
| JORDAN ASHLEY | TREASURER Trustee or director, Officer | 10 | $0 | $0 |
| SARA ARNOLD | SECRETARY Trustee or director, Officer | 10 | $0 | $0 |
| ROBERT ARMSTRONG | DIRECTOR (THRU 07/25) Trustee or director | 10 | $0 | $0 |
| SHAD COULSON | DIRECTOR Trustee or director | 10 | $0 | $0 |
| MARTY FLOURNOY | DIRECTOR Trustee or director | 10 | $0 | $0 |
| MIKE GALLAWAY | DIRECTOR Trustee or director | 10 | $0 | $0 |
| CRAIG GIFFORD | DIRECTOR (AS OF 11/25) Trustee or director | 10 | $0 | $0 |
| MICHAEL GOULIAN | DIRECTOR Trustee or director | 10 | $0 | $0 |
| PHILLIP GRAGG | DIRECTOR Trustee or director | 10 | $0 | $0 |
| BOB HART | DIRECTOR Trustee or director | 10 | $0 | $0 |
| MICHAEL LENTS | DIRECTOR (AS OF 07/25) Trustee or director | 10 | $0 | $0 |
| JOHN OSTMEYER | DIRECTOR (THRU 11/25) Trustee or director | 10 | $0 | $0 |
4 more people on this return
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| LUKE PENNER | DIRECTOR (AS OF 07/25) Trustee or director | 10 | $0 |
| NATHAN RUEDY | DIRECTOR Trustee or director | 10 | $0 |
| AMY SPOWART | DIRECTOR Trustee or director | 10 | $0 |
| JENNIFER VUKOVIC | DIRECTOR (AS OF 11/25) Trustee or director | 10 | $0 |
990 for the year ended February 28, 2025: 17 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| TIM DAHNKE | EXECUTIVE DIRECTOR - AS OF 03/24 Officer | 40 | $55,388 | $3,731 |
| JAMES BOURKE | PRESIDENT Trustee or director, Officer | 10 | $0 | $0 |
| ROB HOLLAND | VICE PRESIDENT Trustee or director, Officer | 10 | $0 | $0 |
| JORDAN ASHLEY | TREASURER Trustee or director, Officer | 10 | $0 | $0 |
| SARA ARNOLD | SECRETARY Trustee or director, Officer | 10 | $0 | $0 |
| ROBERT ARMSTRONG | DIRECTOR Trustee or director | 10 | $0 | $0 |
| DOUG BARTLETT | DIRECTOR - THRU 01/25 Trustee or director | 10 | $0 | $0 |
| MARTY FLOURNOY | DIRECTOR Trustee or director | 10 | $0 | $0 |
| MIKE GALLAWAY | DIRECTOR Trustee or director | 10 | $0 | $0 |
| MICHAEL GOULIAN | DIRECTOR Trustee or director | 10 | $0 | $0 |
| PHILLIP GRAGG | DIRECTOR Trustee or director | 10 | $0 | $0 |
| BOB HART | DIRECTOR Trustee or director | 10 | $0 | $0 |
| DOUG JENKINS | DIRECTOR - THRU 07/24 Trustee or director | 10 | $0 | $0 |
| JOHN OSTMEYER | DIRECTOR Trustee or director | 10 | $0 | $0 |
| NATHAN RUEDY | DIRECTOR Trustee or director | 10 | $0 | $0 |
| AMY SPOWART | DIRECTOR Trustee or director | 10 | $0 | $0 |
| SHAD COULSON | DIRECTOR - AS OF 07/24 Trustee or director | 10 | $0 | $0 |
990 for the year ended February 29, 2024: 22 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| STEPHEN KURTZAHN | EXECUTIVE DIRECTOR - THRU 01/24 Officer | 40 | $48,713 | $35,988 |
| JAMES BOURKE | PRESIDENT Trustee or director, Officer | 10 | $0 | $0 |
| ROB HOLLAND | VICE PRESIDENT Trustee or director, Officer | 10 | $0 | $0 |
| JORDAN ASHLEY | TREASURER Trustee or director, Officer | 10 | $0 | $0 |
| SARA ARNOLD | SECRETARY Trustee or director, Officer | 10 | $0 | $0 |
| ROBERT ARMSTRONG | DIRECTOR - AS OF 07/23 Trustee or director | 10 | $0 | $0 |
| DOUG BARTLETT | DIRECTOR Trustee or director | 10 | $0 | $0 |
| MARTY FLOURNOY | DIRECTOR Trustee or director | 10 | $0 | $0 |
| MIKE GALLAWAY | DIRECTOR - AS OF 07/23 Trustee or director | 10 | $0 | $0 |
| CRAIG GIFFORD | DIRECTOR - THRU 11/23 Trustee or director | 10 | $0 | $0 |
| MICHAEL GOULIAN | DIRECTOR Trustee or director | 10 | $0 | $0 |
| PHILLIP GRAGG | DIRECTOR - AS OF 07/23 Trustee or director | 10 | $0 | $0 |
| BOB HART | DIRECTOR Trustee or director | 10 | $0 | $0 |
| DOUG JENKINS | DIRECTOR Trustee or director | 10 | $0 | $0 |
| DAGMAR KRESS | DIRECTOR - THRU 07/23 Trustee or director | 10 | $0 | $0 |
| BRITTANEE LINCOLN | DIRECTOR - THRU 07/23 Trustee or director | 10 | $0 | $0 |
| DAVID MARTIN | DIRECTOR - THRU 11/23 Trustee or director | 10 | $0 | $0 |
| JOHN OSTMEYER | DIRECTOR Trustee or director | 10 | $0 | $0 |
| GREG PRINCIPATO | DIRECTOR - THRU 09/23 Trustee or director | 10 | $0 | $0 |
| PEGGY RIEDINGER | DIRECTOR - THRU 07/23 Trustee or director | 10 | $0 | $0 |
| NATHAN RUEDY | DIRECTOR - AS OF 07/23 Trustee or director | 10 | $0 | $0 |
| AMY SPOWART | DIRECTOR - AS OF 09/23 Trustee or director | 10 | $0 | $0 |
990 for the year ended February 28, 2023: 17 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| STEPHEN KURTZAHN | EXECUTIVE DIRECTOR Officer | 40 | $55,845 | $28,464 |
| JAMES BOURKE | PRESIDENT Trustee or director, Officer | 10 | $0 | $0 |
| ROB HOLLAND | VICE PRESIDENT Trustee or director, Officer | 10 | $0 | $0 |
| JORDAN ASHLEY | TREASURER Trustee or director, Officer | 10 | $0 | $0 |
| SARA ARNOLD | SECRETARY Trustee or director, Officer | 10 | $0 | $0 |
| DOUG BARTLETT | DIRECTOR Trustee or director | 10 | $0 | $0 |
| MARTY FLOURNOY | DIRECTOR Trustee or director | 10 | $0 | $0 |
| BOB FREEMAN | DIRECTOR Trustee or director | 10 | $0 | $0 |
| CRAIG GIFFORD | DIRECTOR Trustee or director | 10 | $0 | $0 |
| MICHAEL GOULIAN | DIRECTOR Trustee or director | 10 | $0 | $0 |
| DAGMAR KRESS | DIRECTOR Trustee or director | 10 | $0 | $0 |
| BRITTANEE LINCOLN | DIRECTOR Trustee or director | 10 | $0 | $0 |
| DAVID MARTIN | DIRECTOR Trustee or director | 10 | $0 | $0 |
| JOHN OSTMEYER | DIRECTOR Trustee or director | 10 | $0 | $0 |
| GREG PRINCIPATO | DIRECTOR Trustee or director | 10 | $0 | $0 |
| PEGGY RIEDINGER | DIRECTOR Trustee or director | 10 | $0 | $0 |
| DEBBY RIHN-HARVEY | DIRECTOR Trustee or director | 10 | $0 | $0 |
Address and contacts
- Address (IRS master file)
- 3000 POBEREZNY RD, OSHKOSH, WI 54902-8939
- In care of
- % STEPHEN KURTZAHN
- Mailing address (990-N for 2012)
- 1216 Brighton Rd, Naperville IL 60563
- Principal officer (990 for 2025)
- JAMES BOURKE, 3000 POBEREZNY ROAD, OSHKOSH, WI 54902
- Principal officer (990-N for 2012)
- Bill Marinangel, McHenry Savings Bank 353 Bank Dr, McHenry IL 60050
- Signed the 990
- JAMES BOURKE, PRESIDENT
- Phone
- (920) 426-4800
- Website
- www.iacchapter1.org
- Return prepared by
- GRANT THORNTON ADVISORS LLC
Mission
TO ENCOURAGE, AID AND ENGAGE IN RESEARCH, INCLUDING THAT OF A SCIENTIFIC NATURE, AND IN EDUCATION FOR THE IMPROVEMENT OF AVIATION SAFETY THROUGH A BETTER UNDERSTANDING OF THE ART OF AEROBATICS AND TO PROMOTE AND ENCOURAGE AEROBATICS EDUCATION AND (SEE SCHEDULE O) COMPETITION ON A NATIONAL AND INTERNATIONAL LEVEL.
Program accomplishments
- MEMBERSHIP SERVICES - COSTS ASSOCIATED WITH THE FOLLOWING:CONTESTS WHERE THOSE INTERESTED CAN COMPETE IN AEROBATIC EVENTS OBSERVED BY THE GENERAL PUBLIC, PROMOTION OF MEMBERSHIP IN THE ORGANIZATION AND DISTRIBUTION OF VARIOUS AWARDS AND TROPHIES.Expenses $182,749 · grants $7,172 · revenue $301,534
- PUBLICATION - SPORT AEROBATICS, A MONTHLY MAGAZINE IS ISSUED TO MEMBERS WITH INFORMATION ON THE ART OF AEROBATIC AVIATION.Expenses $172,478
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 February, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | February 28, 2026 | July 15, 2026 | 990 on file |
| 2024 | February 28, 2025 | July 15, 2025 | 990 on file |
| 2023 | February 29, 2024 | July 15, 2024 | 990 on file |
IRS record
- EIN
- 23-7067946
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Publicly supported organization (509(a)(2))
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 1985
- Accounting year ends
- February
- Files
- Form 990 or 990-EZ
- Assets (IRS master file)
- $559,465
- Income (IRS master file)
- $514,600
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | February 2026 | $479,516 | $446,598 | $559,465 | XML |
| 990-T | February 2026 | – | – | – | IRS |
| 990 | February 2025 | $402,066 | $435,696 | $516,925 | XML |
| 990-T | February 2025 | – | – | – | IRS |
| 990 | February 2024 | $373,452 | $433,122 | $542,783 | XML |
| 990-T | February 2024 | – | – | – | IRS |
| 990 | February 2023 | $353,702 | $443,273 | $588,703 | XML |
| 990-T | February 2023 | – | – | – | IRS |
| 990 | February 2022 | $367,264 | $389,195 | $652,340 | IRS |
| 990-T | February 2022 | – | – | – | IRS |
| 990 | February 2021 | – | – | – | IRS |
| 990-T | February 2021 | – | – | – | IRS |
| 990 | February 2020 | – | – | – | IRS |
| 990 | February 2019 | – | – | – | IRS |
| 990 | February 2018 | – | – | – | IRS |
| 990-N for 2012 Officer: Bill Marinangel | February 28, 2013 | ≤ $50,000 receipts | – | – | e-Postcard |
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 23-7067946).
Questions about INTERNATIONAL AEROBATIC CLUB INC
- What is the EIN of INTERNATIONAL AEROBATIC CLUB INC?
- The employer identification number (EIN) of INTERNATIONAL AEROBATIC CLUB INC is 23-7067946.
- Is INTERNATIONAL AEROBATIC CLUB INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1985.
- Are donations to INTERNATIONAL AEROBATIC CLUB INC tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does INTERNATIONAL AEROBATIC 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 INTERNATIONAL AEROBATIC CLUB INC due?
- The return for tax year 2026 (the year ending February 28, 2027) is due July 15, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did INTERNATIONAL AEROBATIC CLUB INC last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended February 2026.
- Who is the principal officer of INTERNATIONAL AEROBATIC CLUB INC?
- The 990 for the year ended February 28, 2026 names JAMES BOURKE.
- Who are the officers and directors of INTERNATIONAL AEROBATIC CLUB INC?
- The 990 for the year ended February 28, 2026 lists 19 people; 1 received compensation from the organization, the highest $59,725 (TIM DAHNKE, EXECUTIVE DIRECTOR).
- How much revenue does INTERNATIONAL AEROBATIC CLUB INC have?
- On its 990 for the year ended February 28, 2026 it reported revenue of $479,516, expenses of $446,598 and total assets of $559,465 at year end.
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