Nonprofit · EIN 94-3226411
HILLER AVIATION INSTITUTE
Tax-exempt · SAN CARLOS, CA 94070
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| June 30, 2025 | 990 | $3,947,016 | $3,603,451 | $343,565 | $15,603,781 | $1,049,072 | $14,554,709 |
| June 30, 2024 | 990 | $3,391,133 | $3,251,533 | $139,600 | $14,860,057 | $934,561 | $13,925,496 |
| June 30, 2023 | 990 | $3,071,111 | $3,086,699 | -$15,588 | $14,229,767 | $842,340 | $13,387,427 |
Financial details: 990 for the year ended June 30, 2025
Revenue
- Contributions, gifts and grants
- $500,824
- Program service revenue
- $2,677,622
- Investment income
- $185,929
- Net rental income
- $382,672
- Net income from fundraising events
- -$35,528
- Net income from sales of inventory
- $235,497
- Other revenue
- $582,641
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $186,270
- Other salaries and wages
- $1,421,496
- Salaries, compensation and benefits (total)
- $1,904,460
- Professional fundraising fees
- $0
- Legal fees
- $4,480
- Accounting fees
- $20,262
- Occupancy
- $85,211
- Travel
- $17,696
- Depreciation
- $194,755
- Program services (functional)
- $2,876,146
- Management and general (functional)
- $471,727
- Fundraising (functional)
- $255,578
Balance sheet and other
- Total assets, start of year
- $14,860,057
- Total assets, end of year
- $15,603,781
- Total liabilities, end of year
- $1,049,072
- Net assets, end of year
- $14,554,709
- Land, buildings and equipment
- $1,870,845
- Publicly traded securities
- $4,719,018
- Net assets without donor restrictions
- $11,772,488
- Net assets with donor restrictions
- $2,782,221
- Gross receipts
- $4,233,095
- Employees
- 70
- Volunteers
- 446
- Year formed
- 1995
- State of legal domicile
- CA
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 June 30, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| Jon Welte | CEO Officer | 40 | $164,943 | $21,327 |
| STEPHEN S HILLER | Chairman Trustee or director | 1 | $0 | $0 |
| RICHARD GOSTYLA | BOARD MEMBER Trustee or director | 1 | $0 | $0 |
| MATT CHAMPION | BOARD MEMBER Trustee or director | 1 | $0 | $0 |
| MANUEL TERRANOVA | vice chairman Trustee or director | 1 | $0 | $0 |
| SCOTT CRONCE | BOARD MEMBER Trustee or director | 1 | $0 | $0 |
| BOB GRASSILLI | BOARD MEMBER Trustee or director | 1 | $0 | $0 |
| CHRIS LEE | BOARD MEMBER Trustee or director | 1 | $0 | $0 |
| MUBARIK IMAM | BOARD MEMBER Trustee or director | 1 | $0 | $0 |
| OLIVER COOLIDGE | BOARD MEMBER Trustee or director | 1 | $0 | $0 |
| CARLA LEIBOWITZ | BOARD MEMBER Trustee or director | 1 | $0 | $0 |
| CHARLES LITCHFIELD | BOARD MEMBER Trustee or director | 1 | $0 | $0 |
| RICK ELLINGER | BOARD MEMBER Trustee or director | 1 | $0 | $0 |
| BOB LUNDY | BOARD MEMBER Trustee or director | 1 | $0 | $0 |
| MARK JON BLUTH | BOARD MEMBER Trustee or director | 1 | $0 | $0 |
5 more people on this return
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| ROBERT MACLEAN | BOARD MEMBER Trustee or director | 1 | $0 |
| TINA SRIVASTAVA | BOARD MEMBER Trustee or director | 1 | $0 |
| MICHELLE WILLIAMS | BOARD MEMBER Trustee or director | 1 | $0 |
| KIRSTEN KOMOROSKE | Secretary Trustee or director | 1 | $0 |
| HANK SCHERF | BOARD MEMBER Trustee or director | 1 | $0 |
990 for the year ended June 30, 2024: 23 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Jon Welte | CEO Officer | 40 | $146,207 |
| WILLIAM TURNER | VICE PRESIDENT-OPERATIONS/MARKETING | 40 | $107,348 |
| STEPHEN S HILLER | Chairman Trustee or director | 1 | $0 |
| RICHARD GOSTYLA | BOARD MEMBER Trustee or director | 1 | $0 |
| MATT CHAMPION | BOARD MEMBER Trustee or director | 1 | $0 |
| MANUEL TERRANOVA | vice chairman Trustee or director | 1 | $0 |
| SCOTT CRONCE | BOARD MEMBER Trustee or director | 1 | $0 |
| BOB GRASSILLI | BOARD MEMBER Trustee or director | 1 | $0 |
| CHRIS LEE | BOARD MEMBER Trustee or director | 1 | $0 |
| MUBARIK IMAM | BOARD MEMBER Trustee or director | 1 | $0 |
| OLIVER COOLIDGE | BOARD MEMBER Trustee or director | 1 | $0 |
| CARLA LEIBOWITZ | BOARD MEMBER Trustee or director | 1 | $0 |
| CHARLES LITCHFIELD | BOARD MEMBER Trustee or director | 1 | $0 |
| RICK ELLINGER | BOARD MEMBER Trustee or director | 1 | $0 |
| BOB LUNDY | BOARD MEMBER Trustee or director | 1 | $0 |
| MARK JON BLUTH | BOARD MEMBER Trustee or director | 1 | $0 |
| ROBERT MACLEAN | BOARD MEMBER Trustee or director | 1 | $0 |
| TINA SRIVASTAVA | BOARD MEMBER Trustee or director | 1 | $0 |
| MICHELLE WILLIAMS | BOARD MEMBER Trustee or director | 1 | $0 |
| KIRSTEN KOMOROSKE | Secretary Trustee or director | 1 | $0 |
| HANK SCHERF | BOARD MEMBER Trustee or director | 1 | $0 |
| KATE WORMINGTON | BOARD MEMBER Trustee or director | 1 | $0 |
| MATT CROCE | BOARD MEMBER Trustee or director | 1 | $0 |
990 for the year ended June 30, 2023: 21 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| JEFF BASS | FORMER CEO | 40 | $200,000 |
| REBECCA DURAN | FORMER VP | 40 | $105,152 |
| Jon Welte | CEO Officer | 40 | $101,326 |
| STEPHEN S HILLER | Chairman Trustee or director | 1 | $0 |
| RICHARD GOSTYLA | BOARD MEMBER Trustee or director | 1 | $0 |
| SCOTT CRONCE | BOARD MEMBER Trustee or director | 1 | $0 |
| MANUEL TERRANOVA | BOARD MEMBER Trustee or director | 1 | $0 |
| BOB GRASILLI | BOARD MEMBER Trustee or director | 1 | $0 |
| CHARLES LITCHFIELD | BOARD MEMBER Trustee or director | 1 | $0 |
| CHRIS LEE | BOARD MEMBER Trustee or director | 1 | $0 |
| RICK ELLINGER | BOARD MEMBER Trustee or director | 1 | $0 |
| OLIVER COOLIDGE | BOARD MEMBER Trustee or director | 1 | $0 |
| MUBARIK IMAM | BOARD MEMBER Trustee or director | 1 | $0 |
| MICHELLE WILLIAMS | BOARD MEMBER Trustee or director | 1 | $0 |
| BOB LUNDY | BOARD MEMBER Trustee or director | 1 | $0 |
| MARK JON BLUTH | BOARD MEMBER Trustee or director | 1 | $0 |
| ROBERT MACLEAN | BOARD MEMBER Trustee or director | 1 | $0 |
| KATE WORMINGTON | BOARD MEMBER Trustee or director | 1 | $0 |
| KIRSTEN KOMOROSKE | Secretary Trustee or director | 1 | $0 |
| HANK SCHERF | VICE CHAIRMAN Trustee or director | 1 | $0 |
| MATT CROCE | BOARD MEMBER Trustee or director | 1 | $0 |
Address and contacts
- Address (IRS master file)
- 601 SKYWAY RD, SAN CARLOS, CA 94070-2702
- Signed the 990
- Jon Welte, CEO
- Phone
- (650) 654-0200
- Website
- WWW.HILLER.ORG
- Return prepared by
- Bowers OConnor & AssociatesLLP
California records
California keeps its own records of charities and corporations. Search them by EIN 94-3226411 or by the name HILLER AVIATION INSTITUTE.
- 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)
Mission
THE HILLER AVIATION MUSEUM USES aviation to inspire adventure and innovation while using science to explore how dreams of flight become a reality
Program accomplishments
- THE HILLER AVIATION MUSEUM USES AVIATION AS A GATEWAY FOR PEOPLE TO EMBRACE ADVENTURE AND INNOVATION WHILE USING TOOLS OF SCIENCE TO EXPLORE HOW THE PHYSICAL WORLD WORKS AND HOW THE DREAM OF FLIGHT IS MADE INTO REALITY.THROUGH EXHIBITS AND EXTENSIVE INQUIRY-BASED PROGRAMS THAT INVESTIGATE SCIENCE, AVIATION AND TECHNOLOGY SUBJECTS, THE INSTITUTE DELIVERS LEARNING EXPERIENCES TO A WIDE AUDIENCE, INCLUDING ADULTS, CHILDREN, AND SCHOOL GROUPS. MORE THAN 85,000 VISITORS COME TO OUR EXHIBITS AND EVENTS ANNUALLY.Expenses $2,876,146 · revenue $2,677,622
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 June, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | June 30, 2026 | November 16, 2026 | Not due yet |
| 2024 | June 30, 2025 | November 17, 2025 | 990 on file |
| 2023 | June 30, 2024 | November 15, 2024 | 990 on file |
IRS record
- EIN
- 94-3226411
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Publicly supported organization (170(b)(1)(A)(vi))
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 1995
- Accounting year ends
- June
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Arts, culture and humanities (A540)
- Assets (IRS master file)
- $15,603,781
- Income (IRS master file)
- $4,233,095
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | June 2025 | $3,947,016 | $3,603,451 | $15,603,781 | XML |
| 990 | June 2024 | $3,391,133 | $3,251,533 | $14,860,057 | XML |
| 990 | June 2023 | $3,071,111 | $3,086,699 | $14,229,767 | XML |
| 990 | June 2022 | $3,172,781 | $2,723,679 | $13,765,649 | IRS |
| 990 | June 2021 | – | – | – | IRS |
| 990 | June 2020 | – | – | – | IRS |
| 990 | June 2019 | – | – | – | IRS |
| 990 | June 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 94-3226411).
Questions about HILLER AVIATION INSTITUTE
- What is the EIN of HILLER AVIATION INSTITUTE?
- The employer identification number (EIN) of HILLER AVIATION INSTITUTE is 94-3226411.
- Is HILLER AVIATION INSTITUTE tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1995.
- Are donations to HILLER AVIATION INSTITUTE tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does HILLER AVIATION INSTITUTE 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 HILLER AVIATION INSTITUTE due?
- The return for tax year 2025 (the year ending June 30, 2026) is due November 16, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did HILLER AVIATION INSTITUTE last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended June 2025.
- Who are the officers and directors of HILLER AVIATION INSTITUTE?
- The 990 for the year ended June 30, 2025 lists 20 people; 1 received compensation from the organization, the highest $164,943 (Jon Welte, CEO).
- How much revenue does HILLER AVIATION INSTITUTE have?
- On its 990 for the year ended June 30, 2025 it reported revenue of $3,947,016, expenses of $3,603,451 and total assets of $15,603,781 at year end.
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