Mountainside Master Chorale Inc
Donations deductibleMountainside Master Chorale Inc's network
6 peoplei6 people on this map.The large node is the subject of this page. Solid lines are what the register itself records (6). Form 990 filings give names without a person identifier; SEC insider filings carry a CIK.The board
6 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.Tenure and departures are observed across annual filings. Observed tenure is a lower bound - a member may have joined before the first year on record.| Name | Role as filed | Since | On the board |
|---|---|---|---|
| Deena Ortiz | Vice President | 2024 | 2 yrs |
| John Beckman | President | 2018 | 8 yrs |
| Lisa Simpson | Treasurer | 2018 | 8 yrs |
| Margaret Riehn | Director | 2020 | 6 yrs |
| Nancy Rodewold | Company secretary | 2023 | 3 yrs |
| Tom Molinaro | Director | 2018 | 8 yrs |
Under 5 years5 to 6 years6 years or more
Officers and senior leadership
8 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.| Name | Title as filed | On the filings |
|---|---|---|
| Ariel Pistorino | Staff Singer | since 2019 |
| Irene Messoloras | Artistic Director | since 2018 |
| Karen Morrison | Soprano Staff Singer | since 2024 |
| Matthew Miles | Artistic Director | since 2023 |
| Mindy Kim | Alto Staff Singer | since 2024 |
| Patrick Blackwell | Bass Staff Singer | since 2024 |
| Susan Winckler | Assistant Artistic Director | since 2018 |
| Will Rowley | Tenor Staff Singer | since 2023 |
Pay and hours
year to 31 August 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 |
|---|---|---|---|---|---|
| Matthew Miles | Artistic Director | 5 | $15k | ||
| Zach DeChance | Accompanist | 5 | $7k | ||
| Susan Winckler | Assistant Artistic Director | 7.5 | $4k | ||
| Mindy Kim | Alto Staff Singer | 3 | $3k | ||
| Patrick Blackwell | Bass Staff Singer | 3 | $3k | ||
| Karen Morrison | Soprano Staff Singer | 3 | $3k | ||
| Robin Billings-Reyes | Women's Section Leader | 7.5 | $3k | ||
| John Beckman | President | 5 | $0 | ||
| Deena Ortiz | Vice President | 3 | $0 | ||
| Lisa Simpson | Treasurer | 7.5 | $0 | ||
| Nancy Rodewold | Secretary | 3 | $0 | ||
| Tom Molinaro | Director | 2 | $0 | ||
| Margaret Riehn | Director | 3 | $0 |
About
- Legal name
- Mountainside Master Chorale Inc
- EIN
- 330630904
- Address
- Po Box 268, Claremont, CA, 91711-0268
- State
- California
- Activity (NTEE)
- A6B 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
- 3 (IRS master file code)
- IRS ruling date
- 1 November 1994
- Status
- Code 01 (unconditional exemption)
- Form 990 filings on record
- 8, latest 2025
- IRS Publication 78
- PC (contributions deductible)
Most connected
Longest observed on the filings
≥8years on the filingsJohn Beckman
≥8years on the filingsLisa Simpson
≥8years on the filingsTom Molinaro
≥6years on the filingsMargaret Riehn
Latest return
year to 31 August 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 August 2025. US dollars, as filed.- Total assets
- $60k
- Total liabilities
- $0
- Net assets or fund balances
- $60k
Filed finances
2 yearsiTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.| Tax year | Total revenue | Total expenses | Surplus or deficit |
|---|---|---|---|
| 2024 | $69k | $72k | Deficit $2k |
| 2023 | $47k | $55k | Deficit $8k |
As filed on the IRS Form 990. US dollars.