California · Nonprofit
CHAMBER ORCHESTRA OF THE SOUTH BAY INC
CHAMBER ORCHESTRA OF THE SOUTH BAY INC (California) receives grants from 6 organizations whose IRS filings report $248,597 to it, the largest being THE KENNETH T AND EILEEN L NORRIS FOUNDATION ($120,000). 3 of them have funded it in more than one year.
- Revenue FY2025
- $120k
- Funders on record
- 6
- Grants received
- $249k
- Net assets
- $49k
What Chamber Orchestra of the South Bay Inc does
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 with local educational institutions to provide free open rehearsals for students.
As stated on its FY2025 Form 990.
Program
Provided 4 concerts available to the public community, 4 rehearsals open to students and teachers. Including pre-concert lecture by a noted composer and music critic.
$190,649 spent$52,001 earned by the program100% of program spending
The program described on its FY2024 Form 990. Program spending in total: $190,649.
The organization over time
Each line starts at 100 in 2017, so what you read is the shape rather than the size: 150 means half as much again as 2017, 50 means half. The number beside each label in the key is where it ended. The shaded band is where the middle 50% of its peers' revenue would sit, given their growth.
Balance sheet
Total assets and total liabilities at each year end, in dollars. The largest one-year move in total assets was 2022 to 2023, from $279k to $136k (−51%).
How it's funded, over time
Each bar is one year's revenue split into where it came from, and every bar is the same height — these are shares, not amounts, so a year that raised twice as much looks the same size. Hover a bar for the split.
Government-grant reliance: 2024 11%. Grants only. Government contracts and fees sit inside program revenue.
57% of CHAMBER ORCHESTRA OF THE SOUTH BAY INC’s revenue is contributions — about as donation-reliant as the typical peer (64% for the typical peer).
Surplus & reserves
Operating surplus or deficit each year, and months of liquidity in hand. 5 of the last 6 reported years ran a deficit.
reserve
Leadership and staff
The officers, directors, trustees and key employees listed on each return. Joined and no longer listed compare each filing with the year before, matching people by surname and first initial; a year after a gap, or a roster under three people, has no comparison.
Who funds it, year by year
2018 → 2023: the base held at 1 funder, grant income rose $6k → $20k.
3 of 6 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 50% of grant dollars received. That money is really individual donors directing a sponsor; the institutions to cultivate are the non-DAF funders.
From the IRS filings of CHAMBER ORCHESTRA OF THE SOUTH BAY INC’s funders (the co-funder graph). Association, not causation. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
How concentrated its funding is
CHAMBER ORCHESTRA OF THE SOUTH BAY INC leans on a few funders — its largest provides 48% of grant income and the top three 94%; half comes from just 2 funders.
the vertical line marks half of all grant income — 2 funders to its left
50% of the income these shares are computed over arrives through pass-through sponsors or from payers whose filings do not say what kind of payment it is. Concentration is still measured over all of it, because the money is real; what it does not support is a claim about how many institutions have chosen to fund CHAMBER ORCHESTRA OF THE SOUTH BAY INC.
Largest funder’s share by year: 2018 100% · 2019 100% · 2020 54% · 2021 66% · 2022 50% · 2023 100% — broadly stable.
“Effective funders” = inverse Herfindahl index (1 / Σ shareᵢ²) — the number of equal-sized funders that would give the same concentration. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Where its funders are
100% of CHAMBER ORCHESTRA OF THE SOUTH BAY INC's grant income comes from California funders.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $124k arriving through sponsors registered in 2 states is excluded from the map and the split above: a sponsor holds money on a donor’s behalf, so its registered address would place those dollars somewhere no donor need ever have been. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Against its field
CHAMBER ORCHESTRA OF THE SOUTH BAY INC's funding has concentrated — grant income rose while the number of funders held roughly flat.
this organization peer median middle 50% of peers· 11,634 arts & culture nonprofits $100k–$1M, FY2025
Organizations like CHAMBER ORCHESTRA OF THE SOUTH BAY INC
Organizations whose mission and program text most resemble this one, by semantic similarity over every organization in the US filings — the closest peers, and often the clearest route to shared or prospective funders.
In California
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Where the money goes
100% of spending goes to programs.
Governance
Public support
96%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 1 state
Screen this organization
A dated, signed PDF of the compliance screen for CHAMBER ORCHESTRA OF THE SOUTH BAY INC: IRS status (Business Master File, Publication 78, auto-revocation), the OFAC sanctions lists, the Internal Revenue Bulletin, and California registration, with the Rev. Proc. 2018-32 §8.01 reliance elements stated element by element. Generated from the current files at the moment you download it.
Screens are triage, not determinations; a source that cannot be read reports not screened, never clear. Screen this nonprofit · How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds CHAMBER ORCHESTRA OF THE SOUTH BAY INC?
- CHAMBER ORCHESTRA OF THE SOUTH BAY INC (California) receives grants from 6 organizations whose IRS filings report $248,597 to it, the largest being THE KENNETH T AND EILEEN L NORRIS FOUNDATION ($120,000). 3 of them have funded it in more than one year.
- How many funders does CHAMBER ORCHESTRA OF THE SOUTH BAY INC have?
- IRS filings report 6 organizations giving $248,597 in grants to CHAMBER ORCHESTRA OF THE SOUTH BAY INC, 3 of which have funded it in more than one year.
- Who is the largest funder of CHAMBER ORCHESTRA OF THE SOUTH BAY INC?
- THE KENNETH T AND EILEEN L NORRIS FOUNDATION is the largest funder on record, with $120,000 in grants. The full list of funders is on this page.
- How can an organization like CHAMBER ORCHESTRA OF THE SOUTH BAY INC find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in California. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
Play a game about who funds Chamber Orchestra of the South Bay →
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2025 (financials across 2017–2025), and the filings of 6 funders that report grants to it. “On record” means captured in the filings we have parsed — a funder that does not e-file, or whose grant detail is not itemized, will not appear. Filings run roughly 12–24 months behind. Trends on this page end at FY2023, the last fiscal year that has finished arriving; later years are shown and marked, and move no figure. Data on this page was exported October 14, 2026. What this page cannot tell you · view filing