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US nonprofit · EIN 237259502 · PLS VRDS PNSL, CAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 237259502) - NTEE activity code, address.Board and officers IRS Form 990 annual filings, Part VII (directors, trustees, officers, key employees), read year by year to observe time served.Latest return IRS Form 990 series e-file data - 990 for the year to 30 June 2025: assets, liabilities, staff, website, telephone, pay.Renewal outlook Computed by Governance Register from the observed filing history and filed revenue. Not a statement that the organisation is recruiting.Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Chamber Orchestra of the South Bay Inc

Donations deductible
Revenue
$120k
year to 30 June 2025
Expenses
$191k
year to 30 June 2025
Total assets
$49k
$120 liabilities
Net assets
$49k
assets less liabilities
Directors and trustees
4
4.9 years on average
Staff
1
6 volunteers
Left since last filing
0
no seats appear to have opened
Officers and senior staff
3
named in Part VII
How am I connected?

Chamber Orchestra of the South Bay Inc's network

4 people1 organisationi4 people and 1 organisation on this map.The large node is the subject of this page. Solid lines are what the register itself records (4). Violet dotted lines (1) 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

4 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 7 voting members of its governing body on its latest Form 990 Part VI; we list 4 in Part VII (Part VII does not always name every voting member).
NameRole as filedSinceOn the board
Gail EffrosDirector2021
5 yrs
Peter V BarrettPresident Emeritus2021
5 yrs
Ron DefreesPresident, Elect2023
3 yrs
Stephen RichardsDirector2021
5 yrs
Under 5 years5 to 6 years6 years or more

Officers and senior leadership

3 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.
NameTitle as filedOn the filings
Lois McFarlandCompany secretarysince 2021
Marianne SfreddoTreasurersince 2021
Paula MoorePresidentsince 2021

Pay and hours

year to 30 June 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.
NameTitle as filedHours a weekPay from the organisationRelated organisationsOther
Marianne SfreddoTreasurer10$3k
Ron DefreesPresident10$0
Lois McFarlandSecretary10$0

About

Legal name
Chamber Orchestra of the South Bay Inc
EIN
237259502
Address
Po Box 2095, PLS VRDS PNSL, CA, 90274-8095
State
California
Mission
The primary mission of the cosb is to bring a high level of artistic excellence to the south bay area of los angeles county. The cosb now serves as the only professional classical orchestra resident in the south bay (long beach is not demographically part of the south bay, and the los angeles philharmonic has ceased performing in the south bay). A secondary mission of the cosb is to partner... (as filed on the Form 990)
Activity (NTEE)
A69Z 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)
Formed
1973
Principal officer
Ron Defrees (as named on the Form 990)
IRS ruling date
1 April 1973
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

≥5years on the filingsGail Effros
≥5years on the filingsPeter V Barrett
≥5years on the filingsStephen Richards
≥3years on the filingsRon Defrees

Latest return

year to 30 June 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 30 June 2025. US dollars, as filed.
Total assets
$49k
Total liabilities
$120
Net assets or fund balances
$49k
Contributions and grants received
$68k
Program service revenue
$31k
Employees
1
Volunteers
6