Mainframe Studios
Donations deductibleMainframe Studios' network
9 people2 organisationsi9 people and 2 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (9). Violet dotted lines (2) are likely: the same full name sits on the current board of another organisation in the same register and region. Form 990 filings give names without a person identifier; SEC insider filings carry a CIK. It may be a different person.The board
9 listediTime on the board is observed from the annual filings: the IRS files no appointment date, so the bar counts years from the first filing the person appears on - a lower bound, not a filed start date. Names are exactly as filed. The IRS publishes no person identifier, so this edition does not yet link a person across organisations in the tables. The network map shows same-name matches as likely links only, never as confirmed.Time served and departures are observed across annual filings. Observed time served is a lower bound - a member may have joined before the first year on record. The organisation reported 9 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.| Name | Role as filed | Since | On the board |
|---|---|---|---|
| David Schmitz | Member | 2023 | 3 yrs |
| Gretchen Bohling | Company secretary | 2022 | 4 yrs |
| Jill Wells | Member | 2023 | 3 yrs |
| John Mandelbaum | Member | 2022 | 4 yrs |
| John McGowan | Vice President | 2022 | 4 yrs |
| Justin Mandelbaum | President | 2022 | 4 yrs |
| Meredith Stahl | Member | 2023 | 3 yrs |
| Michael Trettin | Treasurer | 2022 | 4 yrs |
| Sarah Young | Member | 2022 | 4 yrs |
Under 5 years5 to 6 years6 years or more
Pay and hours
year to 31 December 2025iFrom Part VII of the Form 990: compensation reported for each officer, director, trustee, key employee and highest-paid staff member, and the average hours a week they report. Most board members are unpaid; a blank means nothing was reported. Pay from related organisations is shown separately.| Name | Title as filed | Hours a week | Pay from the organisation | Related organisations | Other |
|---|---|---|---|---|---|
| Julia Franklin-Jones | Executive Director | 50 | $115k | ||
| Jill Wells | Secretary | 0.5 | $3k | ||
| John McGowan | President | 10 | $0 | ||
| Sarah Young | Vice President | 1 | $0 | ||
| Michael Trettin | Treasurer | 3 | $0 | ||
| Justin Mandelbaum | Director | 0.25 | $0 | ||
| David Schmitz | Director | 0.25 | $0 | ||
| Meredith Hubbell Stahl | Director | 0.25 | $0 | ||
| Dr Kelly Baum | Director | 0.25 | $0 | ||
| Gretchen Bohling | Director | 0.25 | $0 | ||
| Jeff Chelesvig | Director | 0.25 | $0 |
About
- Legal name
- Mainframe Studios
- EIN
- 461637111
- Address
- 900 Keosauqua Way, Des Moines, IA, 50309-1501
- State
- Iowa
- Mission
- Mainframe Studios provides affordable arts workspace and fosters creative communities in central Iowa. (as filed on the Form 990)
- Activity (NTEE)
- A99 Arts, culture and humanities
- IRS classification
- 501(c)03 (tax-exempt under section 501(c)(3) where shown)
- Classified purpose
- Arts, Culture & Humanities
- Size band
- 7 (IRS master file code)
- Formed
- 2012
- Principal officer
- John McGowan (as named on the Form 990)
- IRS ruling date
- 1 July 2014
- Status
- Code 01 (unconditional exemption)
- Form 990 filings on record
- 2, latest 2023
- IRS Publication 78
- PC (contributions deductible)
Most connected
Longest observed on the filings
≥4years on the filingsGretchen Bohling
≥4years on the filingsJohn Mandelbaum
≥4years on the filingsJohn McGowan
≥4years on the filingsJustin Mandelbaum
Latest return
year to 31 December 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 December 2025. US dollars, as filed.- Total assets
- $9.4m
- Total liabilities
- $150k
- Net assets or fund balances
- $9.3m
- Contributions and grants received
- $336k
- Program service revenue
- $1.4m
- Employees
- 6
- Volunteers
- 17
State registration
1 entityiBusiness-entity registers published by US states. These records are matched to this organisation by name and state, not by EIN, and are labelled as likely matches. Street addresses are not shown.Mainframe Studios likely matchiMatched by exact name and state (and ZIP where shown). State registers do not publish EINs, so this is not a confirmed match. Source: Iowa Secretary of State, active business entities (data.iowa.gov ez5t-3qay). Licence: CC BY 4.0. Attribution: Iowa Secretary of State. Data last fetched 18 October 2026.
- State
- Iowa
- Entity type
- Revised Domestic Non-Profit
- Status
- Active
- Formed
- 25 January 2012
- Registered agent
- Nathan J Barber (city and state not held)