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Florida · Nonprofit

CALUSA NATURE CENTER & PLANETARIUM INC

CALUSA NATURE CENTER & PLANETARIUM INC (Florida) receives grants from 8 organizations whose IRS filings report $346,245 to it, the largest being FRED & JEAN ALLEGRETTI FOUNDATION ($180,433). 5 of them have funded it in more than one year.

Revenue FY2025
$943k
Funders on record
8
Grants received
$346k
Net assets
$345k
5/8 repeat funderspeak grant-dependency 31%
01What it does

What Calusa Nature Center & Planetarium Inc does

Mission

Inspiring people to connect with nature

As stated on its FY2025 Form 990.

Programs

  1. Natural History Programs includes maintenance & interpretation of exhibits and trail system, along with education programs for both children and adults

    $528,885 spent$858,362 earned by the program
    100% of program spending
  2. Earth and Space Science programs - includes maintenance & Interpretation of exhibits and presentation in the planetarium, along with education for both children and adults through laser and planetarium presentation

    $0 spent
    0% of program spending

The 2 programs described on its FY2024 Form 990, listed largest first by expense. Program spending in total: $528,885.

02The organization over time

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.

100 = 20172017 Revenue 100 ($350k) Expenses 100 ($392k) Net assets 100 ($231k)2018 Revenue 112 ($392k) Expenses 100 ($390k) Net assets 101 ($233k)2019 Revenue 118 ($413k) Expenses 108 ($424k) Net assets 90 ($209k)2020 Revenue 131 ($459k) Expenses 95 ($371k) Net assets 126 ($292k)2021 Revenue 182 ($637k) Expenses 101 ($397k) Net assets 230 ($531k)2022 Revenue 102 ($356k) Expenses 135 ($530k) Net assets 154 ($357k)2023 Revenue 123 ($432k) Expenses 130 ($509k) Net assets 94 ($218k)2024 Revenue 162 ($568k) Expenses 146 ($571k) Net assets 132 ($305k)2025 Revenue 269 ($943k) Expenses 158 ($618k) Net assets 149 ($345k)
'17'18'19'20'21'22'23'24'25
Revenue (269)Expenses (158)Net assets (149)Peer revenue range

Balance sheet

Total assets and total liabilities at each year end, in dollars. The largest one-year move in total assets was 2019 to 2020, from $290k to $523k (+80%).

$284k
$283k
$290k
$523k
$710k
$527k
$447k
$583k
$534k
'17'18'19'20'21'22'23'24'25
Total assetsTotal liabilities

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.

2017
2018
2019
2020
2021
2022
2023
2024
2025
ContributionsProgram revenueInvestmentOther

Government-grant reliance: 2020 31% · 2021 49% · 2022 2% · 2023 1% · 2024 1% · 2025 0%. Grants only. Government contracts and fees sit inside program revenue.

1% of CALUSA NATURE CENTER & PLANETARIUM INC’s revenue is contributions — more earned-revenue than three-quarters of its peers (64% for the typical peer).

This organization
Typical peer · 19,547 orgs

Surplus & reserves

Operating surplus or deficit each year, and months of liquidity in hand. 5 of the last 9 reported years ran a deficit.

−$42k
’17
$2k
’18
−$11k
’19
$88k
’20
$239k
’21
−$174k
’22
−$77k
’23
−$2k
’24
$325k
’25
0.9
months of
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.

Chief executive

Eric Raddatz

Executive Director

Board chair

Britta Soderqvist

Chair

As listed on its FY2025 Form 990.

'17'18'19'20'21'22'23'24'25
Listed19165201717182418
Joined·+3+2+16+3+0+1+17+3
No longer listed·6131600119
03Who funds it

Who funds it, year by year

2019 → 2023: the base broadened from 2 funders to 3 funders, grant income fell $130k → $3k.

3 of 8 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 45% 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 CALUSA NATURE CENTER & PLANETARIUM INC’s funders (the co-funder graph). Top 7 of 8 funders by total. 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

CALUSA NATURE CENTER & PLANETARIUM INC leans on a few funders — its largest provides 52% of grant income and the top three 97%; half comes from just 1 funder.

the vertical line marks half of all grant income — 1 funder to its left

45% 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 CALUSA NATURE CENTER & PLANETARIUM INC.

52%
largest funder
97%
top three
~2
effective funders

Largest funder’s share by year: 2019 100% · 2020 52% · 2021 99% · 2022 96% · 2023 63% — diversifying over time.

“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

98% of CALUSA NATURE CENTER & PLANETARIUM INC's grant income comes from Florida funders.

NY
MO
FL

In-state vs out-of-state, by year

’19
’21
’23
Florida out of state home

Funder states come from each funder’s own filing. $157k arriving through sponsors registered in 3 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.

04Its place in the field

Against its field

CALUSA NATURE CENTER & PLANETARIUM INC runs a healthier operating margin than three-quarters of the 11,634 arts & culture nonprofits its size.

Operating margin34% · top quartile
Months of reserve0.9mo · bottom quartile
Revenue growth (annualized)13% · above the median

this organization peer median middle 50% of peers· 11,634 arts & culture nonprofits $100k–$1M, FY2025

Organizations like CALUSA NATURE CENTER & PLANETARIUM 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 Florida

Nationally

05Profile & governance

Read directly from this organization’s own Form 990, as neutral context.

Where the money goes

74% of spending goes to programs.

Program 74%Management 26%Fundraising 0%

Governance

20
board members
100%
independent
✓Conflict-of-interest policy–Whistleblower policy–Document retention✓Board reviewed the 990–Audited financials

Public support

100%

Share of support from the public (Schedule A) — the basis for its public-charity status.

Footprint & structure

Files a return copy in 1 state

FL

Screen this organization

A dated, signed PDF of the compliance screen for CALUSA NATURE CENTER & PLANETARIUM 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.

A paid feature, included from the $75 plan up. Sign in to download.

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 CALUSA NATURE CENTER & PLANETARIUM INC?
CALUSA NATURE CENTER & PLANETARIUM INC (Florida) receives grants from 8 organizations whose IRS filings report $346,245 to it, the largest being FRED & JEAN ALLEGRETTI FOUNDATION ($180,433). 5 of them have funded it in more than one year.
How many funders does CALUSA NATURE CENTER & PLANETARIUM INC have?
IRS filings report 8 organizations giving $346,245 in grants to CALUSA NATURE CENTER & PLANETARIUM INC, 5 of which have funded it in more than one year.
Who is the largest funder of CALUSA NATURE CENTER & PLANETARIUM INC?
FRED & JEAN ALLEGRETTI FOUNDATION is the largest funder on record, with $180,433 in grants. The full list of funders is on this page.
How can an organization like CALUSA NATURE CENTER & PLANETARIUM INC find more funders?
Start with the funders already giving here, then look at the foundations that back similar organizations in Florida. 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 Calusa Nature Center & Planetarium →

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 8 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