Nonprofit · EIN 38-2236345
ANN ARBOR HANDS ON MUSEUM
Tax-exempt · ANN ARBOR, MI 48104
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| September 30, 2025 | 990 | $4,568,439 | $4,645,663 | -$77,224 | $11,373,109 | $1,066,060 | $10,307,049 |
| September 30, 2024 | 990 | $4,770,869 | $3,953,492 | $817,377 | $11,459,810 | $1,075,537 | $10,384,273 |
| September 30, 2023 | 990 | $4,344,181 | $3,327,486 | $1,016,695 | $10,640,979 | $986,649 | $9,654,330 |
Financial details: 990 for the year ended September 30, 2025
Revenue
- Contributions, gifts and grants
- $1,264,372
- of which government grants
- $9,350
- Program service revenue
- $2,747,971
- Investment income
- $217,369
- Net income from sales of inventory
- $179,906
- Other revenue
- $338,727
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $140,012
- Other salaries and wages
- $2,113,751
- Salaries, compensation and benefits (total)
- $2,740,328
- Professional fundraising fees
- $0
- Accounting fees
- $17,500
- Occupancy
- $240,672
- Travel
- $41,193
- Depreciation
- $518,722
- Program services (functional)
- $3,425,232
- Management and general (functional)
- $861,906
- Fundraising (functional)
- $358,525
Balance sheet and other
- Total assets, start of year
- $11,459,810
- Total assets, end of year
- $11,373,109
- Total liabilities, end of year
- $1,066,060
- Net assets, end of year
- $10,307,049
- Land, buildings and equipment
- $4,091,734
- Publicly traded securities
- $11,530
- Net assets without donor restrictions
- $8,839,461
- Net assets with donor restrictions
- $1,467,588
- Gross receipts
- $4,756,012
- Employees
- 81
- Volunteers
- 500
- Year formed
- 1979
- State of legal domicile
- MI
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 September 30, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| SUSAN WESTHOFF | PRESIDENT/CE Officer | 40 | $140,012 | $31,961 |
| MATTHIAS BAUER | TRUSTEE Trustee or director | 0.5 | $0 | $0 |
| PAIGE MORRISON | CHAIR Trustee or director, Officer | 1 | $0 | $0 |
| KIRA BARTON | TRUSTEE Trustee or director | 0.5 | $0 | $0 |
| ROSA BUSHKUHL | TRUSTEE Trustee or director | 0.5 | $0 | $0 |
| PAUL FANSON | VICE CHAIR Trustee or director, Officer | 1 | $0 | $0 |
| SCHUYLER FERGUSON | TRUSTEE Trustee or director | 0.5 | $0 | $0 |
| MARK HOLTZ | TREASURER Trustee or director, Officer | 1 | $0 | $0 |
| WAYNE MILLETTE | MEMBER AT LA Trustee or director | 0.5 | $0 | $0 |
| NICK SCHMIDT | TRUSTEE Trustee or director | 0.5 | $0 | $0 |
| ANDY BUCHSBAUM | TRUSTEE Trustee or director | 0.5 | $0 | $0 |
| SEAN ETHERIDGE | TRUSTEE Trustee or director | 0.5 | $0 | $0 |
| JEFFREY EVANS | TRUSTEE Trustee or director | 0.5 | $0 | $0 |
| SHOSHANNAH LENSKI | SECRETARY Trustee or director, Officer | 1 | $0 | $0 |
| ALAN P JESIEL | TRUSTEE Trustee or director | 0.5 | $0 | $0 |
5 more people on this return
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| PRAVEENA RAMASWAMI | TRUSTEE Trustee or director | 0.5 | $0 |
| THERESE PERLOWSKI | TRUSTEE Trustee or director | 0.5 | $0 |
| MIKE SHRIBERG | TRUSTEE Trustee or director | 0.5 | $0 |
| KARTHIK RAMANI | TRUSTEE Trustee or director | 0.5 | $0 |
| ROBERT J ROCK | TRUSTEE Trustee or director | 0.5 | $0 |
990 for the year ended September 30, 2024: 20 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| SUSAN WESTHOFF | PRESIDENT/EX Officer | 40 | $130,792 |
| DONALD BURKE | MEMBER AT LA Trustee or director | 1 | $0 |
| MATTHIAS BAUER | TRUSTEE Trustee or director | 0.5 | $0 |
| PAIGE MORRISON | CHAIR Trustee or director, Officer | 1 | $0 |
| RICHARD CHANG | MEMBER AT LA Trustee or director | 1 | $0 |
| KIRA BARTON | TRUSTEE Trustee or director | 0.5 | $0 |
| ROSA BUSHKUHL | TRUSTEE Trustee or director | 0.5 | $0 |
| PAUL FANSON | VICE CHAIR Trustee or director, Officer | 1 | $0 |
| SCHUYLER FERGUSON | TRUSTEE Trustee or director | 0.5 | $0 |
| MARK HOLTZ | TREASURER Trustee or director, Officer | 1 | $0 |
| WAYNE MILLETTE | MEMBER AT LA Trustee or director | 1 | $0 |
| NICK SCHMIDT | TRUSTEE Trustee or director | 0.5 | $0 |
| ANDY BUCHSBAUM | TRUSTEE Trustee or director | 0.5 | $0 |
| SEAN ETHERIDGE | MEMBER AT LA Trustee or director | 1 | $0 |
| JEFFREY EVANS | TRUSTEE Trustee or director | 0.5 | $0 |
| SHOSHANNAH LENSKI | SECRETARY Trustee or director, Officer | 1 | $0 |
| ALAN P JESIEL | TRUSTEE Trustee or director | 0.5 | $0 |
| PRAVEENA RAMASWAMI | TRUSTEE Trustee or director | 0.5 | $0 |
| THERESE PERLOWSKI | TRUSTEE Trustee or director | 0.5 | $0 |
| MIKE SHRIBERG | TRUSTEE Trustee or director | 0.5 | $0 |
990 for the year ended September 30, 2023: 21 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| MEL DRUMM | EXECUTIVE DI Trustee or director, Officer | 40 | $167,544 |
| SUSAN WESTHOFF | PRESIDENT/EX Officer | 40 | $82,108 |
| DONALD BURKE | CHAIR Trustee or director, Officer | 1 | $0 |
| MEGAN TORRANCE | VICE CHAIR Trustee or director, Officer | 1 | $0 |
| MATTHIAS BAUER | TREASURER Trustee or director, Officer | 1 | $0 |
| PAIGE MORRISON | MEMBER AT LA Trustee or director | 1 | $0 |
| RICHARD CHANG | MEMBER AT LA Trustee or director | 1 | $0 |
| KIRA BARTON | TRUSTEE Trustee or director | 0.5 | $0 |
| ROSA BUSHKUHL | SECRETARY Trustee or director, Officer | 1 | $0 |
| PAUL FANSON | TRUSTEE Trustee or director | 0.5 | $0 |
| SCHUYLER FERGUSON | TRUSTEE Trustee or director | 0.5 | $0 |
| MARK HOLTZ | TRUSTEE Trustee or director | 0.5 | $0 |
| WAYNE MILLETTE | TRUSTEE Trustee or director | 0.5 | $0 |
| NICK SCHMIDT | TRUSTEE Trustee or director | 0.5 | $0 |
| MIKE SHRIBERG | TRUSTEE Trustee or director | 0.5 | $0 |
| SUSAN AUGUSTINE | TRUSTEE Trustee or director | 0.5 | $0 |
| SEAN ETHERIDGE | TRUSTEE Trustee or director | 0.5 | $0 |
| JEFFREY EVANS | TRUSTEE Trustee or director | 0.5 | $0 |
| SHOSHANNAH LENSKI | TRUSTEE Trustee or director | 0.5 | $0 |
| DENISE J MURRAY | TRUSTEE Trustee or director | 0.5 | $0 |
| PRAVEENA RAMASWAMI | TRUSTEE Trustee or director | 0.5 | $0 |
Address and contacts
- Address (IRS master file)
- 220 E ANN ST, ANN ARBOR, MI 48104-1445
- Principal officer (990 for 2024)
- SUSAN WESTHOFF, 220 EAST ANN STREET, ANN ARBOR, MI 48104
- Signed the 990
- THOMAS BUTLER, CFO
- Phone
- (734) 995-5439
- Website
- WWW.AAHOM.ORG
- Return prepared by
- WILLIS & JURASEK PC CPAS
Mission
ANN ARBOR HANDS-ON MUSEUM CREATES MOMENTS OF DISCOVERY THAT INSPIRE CURIOSITY, EXPLORATION AND RESPECT FOR STEM AND THE NATURAL WORLD. TOGETHER WITH THE LESLIE SCIENCE & NATURE CENTER, WE ENVISION A WORLD WHERE CURIOSITY TODAY LEADS TO MORE PURPOSEFUL LIVES TOMORROW.
Program accomplishments
- THE ANN ARBOR HANDS-ON MUSEUM AND LESLIE SCIENCE & NATURE CENTER PROVIDE UNIQUE, INSPIRING PROGRAMS AND SPACES FOR COMMUNITIES ACROSS SOUTHEASTERN MICHIGAN TO ENJOY. WE SERVE OVER 300,000 ANNUALLY THROUGH OUR INNOVATIVE PROGRAMMING, ENGAGING AREA SCHOOLS, SCOUTS, COMMUNITY GROUPS AND FAMILIES TO EXPLORE STEM CONCEPTS AND CAREERS. THROUGH OUR ANN ARBOR LOCATIONS AND OUTREACH PROGRAMMING, WE ENGAGE PEOPLE ACROSS 11 COUNTIES IN SOUTHEAST MICHIGAN AS WELL AS THROUGHOUT THE STATE AND NATION THROUGH OUR DISTANCE LEARNING PROGRAMS. IN ADDITION, WE PROVIDE ROBUST TOP-RATED VIRTUAL PROGRAMMING ACROSS THE COUNTRY AND EVEN WORLD-WIDE. THE MUSEUM OPERATES DAILY PROGRAMMING BOTH ON- AND OFF-SITE; BRINGING SCIENTIFIC CONCEPTS TO LIFE THROUGH HANDS-ON EXPERIMENTS. THE MUSEUM CENTERS ACCESSIBILITY IN OUR PROGRAMMING WITH SCHOLARSHIPS, AS WELL AS DISCOUNTED ADMISSIONS FOR UNDERSERVED COMMUNITIES. BARRIER-FREE ACCESS IS PARAMOUNT TO OUR WORK, AND WE SEEK TO EXPLORE EXPANDING OPPORTUNITIES FOR ALL TO LEARN ABOUT STEM AND EXPLORE CAREER PATHWAYS. THE LESLIE SCIENCE AND NATURE CENTER PROVIDES PROGRAMMING WHICH INCLUDES ENVIRONMENTAL EDUCATION ALONG WITH WILDLIFE AND SCIENCE-BASED PROGRAMS FOR CHILDREN AND FAMILIES. PROGRAMMING INCLUDES SCHOOL FIELD TRIPS TO THE NATURE CENTER, OUTREACH ACROSS SOUTHEASTERN MICHIGAN INCLUDING LIVE WILDLIFE PRESENTATIONS AND ENVIRONMENTAL PROGRAMMING AS WELL AS A ROBUST SUMMER CAMP PROGRAM.Expenses $3,425,232 · revenue $3,086,698
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 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 15, 2027 | Not due yet |
| 2024 | September 30, 2025 | February 16, 2026 | 990 on file |
| 2023 | September 30, 2024 | February 17, 2025 | 990 on file |
IRS record
- EIN
- 38-2236345
- 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
- 1979
- Accounting year ends
- September
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Arts, culture and humanities (A520)
- Assets (IRS master file)
- $11,373,109
- Income (IRS master file)
- $4,756,012
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | September 2025 | $4,568,439 | $4,645,663 | $11,373,109 | XML |
| 990 | September 2024 | $4,770,869 | $3,953,492 | $11,459,810 | XML |
| 990 | September 2023 | $4,344,181 | $3,327,486 | $10,640,979 | XML |
| 990 | September 2022 | $3,859,721 | $2,817,471 | $8,897,248 | IRS |
| 990 | 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 38-2236345).
Questions about ANN ARBOR HANDS ON MUSEUM
- What is the EIN of ANN ARBOR HANDS ON MUSEUM?
- The employer identification number (EIN) of ANN ARBOR HANDS ON MUSEUM is 38-2236345.
- Is ANN ARBOR HANDS ON MUSEUM tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1979.
- Are donations to ANN ARBOR HANDS ON MUSEUM tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does ANN ARBOR HANDS ON MUSEUM 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 ANN ARBOR HANDS ON MUSEUM due?
- The return for tax year 2025 (the year ending September 30, 2026) is due February 15, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did ANN ARBOR HANDS ON MUSEUM last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended September 2025.
- Who is the principal officer of ANN ARBOR HANDS ON MUSEUM?
- The 990 for the year ended September 30, 2025 names SUSAN WESTHOFF.
- Who are the officers and directors of ANN ARBOR HANDS ON MUSEUM?
- The 990 for the year ended September 30, 2025 lists 20 people; 1 received compensation from the organization, the highest $140,012 (SUSAN WESTHOFF, PRESIDENT/CE).
- How much revenue does ANN ARBOR HANDS ON MUSEUM have?
- On its 990 for the year ended September 30, 2025 it reported revenue of $4,568,439, expenses of $4,645,663 and total assets of $11,373,109 at year end.
Other nonprofits in ANN ARBOR
- UNIVERSITY MUSICAL SOCIETY EIN 38-1545881 · last filed 990 for 2025
- MICHIGAN THEATER FOUNDATION INC EIN 38-2269013 · last filed 990 for 2025
- THE ARK EIN 38-1802396 · last filed 990 for 2025
- NEUTRAL ZONE EIN 38-3407568 · last filed 990 for 2025
- ANN ARBOR ART ASSOCIATION EIN 23-7205537 · last filed 990 for 2025
- ANN ARBOR SUMMER FESTIVAL INC EIN 38-2307397 · last filed 990 for 2025
- MICHIGAN GUILD OF ARTISTS & ARTISANS EIN 38-2300196 · last filed 990 for 2025
- ANTHROPOSOPHICAL SOCIETY IN AMERICA EIN 13-1628147 · last filed 990 for 2025
All nonprofits in ANN ARBOR · Michigan · Arts, culture and humanities