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Nonprofit · EIN 59-2549600

MARJORY STONEMAN DOUGLAS BISCAYNE NATURE CENTER

Tax-exempt · KEY BISCAYNE, FL 33149

Financials

$426K$500K2022$525K$530K2023$457K$458K2024
Revenue Expenses · by fiscal year end
Financials of MARJORY STONEMAN DOUGLAS BISCAYNE NATURE CENTER by year, from its e-filed returns
Year endedFormRevenueExpensesNet incomeTotal assetsLiabilitiesNet assets
September 30, 2025990$456,680$457,728-$1,048$578,875$2,514$576,361
September 30, 2024990$525,253$530,346-$5,093$594,120$16,731$577,389
September 30, 2023990$426,113$500,480-$74,367$585,330$7,098$578,232
Financial details: 990 for the year ended September 30, 2025

Revenue

Contributions, gifts and grants
$294,012
of which government grants
$142,384
Program service revenue
$145,458
Investment income
$13,552
Net income from sales of inventory
-$1,921
Other revenue
$3,658

Expenses

Grants and similar amounts paid
$0
Compensation of officers, directors and key employees
$114,125
Other salaries and wages
$58,545
Salaries, compensation and benefits (total)
$185,370
Professional fundraising fees
$0
Accounting fees
$6,717
Occupancy
$2,231
Travel
$4,953
Depreciation
$14,472
Program services (functional)
$332,793
Management and general (functional)
$112,701
Fundraising (functional)
$12,234

Balance sheet and other

Total assets, start of year
$594,120
Total assets, end of year
$578,875
Total liabilities, end of year
$2,514
Net assets, end of year
$576,361
Land, buildings and equipment
$85,903
Net assets without donor restrictions
$576,361
Gross receipts
$460,661
Employees
4
Volunteers
0
Year formed
1985
State of legal domicile
FL

From the e-filed returns the IRS publishes as XML (latest three processing years; amended returns replace the original). PDF copies at the IRS.

Officers, directors and key employees

As listed on the 990 for the year ended September 30, 2025, highest compensation first.

NameTitleHours / weekCompensationOther / benefits
Theodora LongExecutive Director
Officer
40$115,500$9,000
Leslie Armendariz EsqPresident
Trustee or director
5$0$0
Steve SorkinVice President
Trustee or director
2$0$0
Steven HenriquezTreasurer
Trustee or director
2$0$0
James TilghmanSecretary
Trustee or director
2$0$0
Judith Maddox SaylorDirector
Trustee or director
2$0$0
Claudia BineloDirector
Trustee or director
2$0$0
Jacqueline Gross-KelloggDirector
Trustee or director
2$0$0
Frank KaplanDirector
Trustee or director
2$0$0
Mario Garcia-Serra EsqDirector
Trustee or director
2$0$0
Jacqueline GopieDirector
Trustee or director
2$0$0
Brett GraffDirector
Trustee or director
2$0$0
990 for the year ended September 30, 2024: 12 people
NameTitleHours / weekCompensationOther / benefits
Theodora LongExecutive Director
Officer
40$114,125$9,000
Leslie Armendariz EsqPresident
Trustee or director
5$0$0
Steve SorkinVice President
Trustee or director
2$0$0
Steven HenriquezTreasurer
Trustee or director
2$0$0
James TilghmanSecretary
Trustee or director
2$0$0
Judith Maddox SaylorDirector
Trustee or director
2$0$0
Claudia BineloDirector
Trustee or director
2$0$0
Jacqueline Gross-KelloggDirector
Trustee or director
2$0$0
Frank KaplanDirector
Trustee or director
2$0$0
Mario Garcia-Serra EsqDirector
Trustee or director
2$0$0
Jacqueline GopieDirector
Trustee or director
2$0$0
Brett GraffDirector
Trustee or director
2$0$0
990 for the year ended September 30, 2023: 12 people
NameTitleHours / weekCompensationOther / benefits
Theodora LongExecutive Director
Officer
40$101,000$9,000
Leslie Armendariz EsqPresident
Trustee or director
5$0$0
Steve SorkinVice President
Trustee or director
2$0$0
Steven HenriquezTreasurer
Trustee or director
2$0$0
James TilghmanSecretary
Trustee or director
2$0$0
Judith Maddox SaylorDirector
Trustee or director
2$0$0
Claudia BineloDirector
Trustee or director
2$0$0
Jacqueline Gross-KelloggDirector
Trustee or director
2$0$0
Frank KaplanDirector
Trustee or director
2$0$0
Mario Garcia-Serra EsqDirector
Trustee or director
2$0$0
Jacqueline GopieDirector
Trustee or director
2$0$0
Brett GraffDirector
Trustee or director
2$0$0

Address and contacts

Address (IRS master file)
6767 CRANDON BLVD, KEY BISCAYNE, FL 33149-3201
Principal officer (990 for 2024)
Theodora Long, 6767 Crandon Blvd, Key Biscayne, FL 33149
Signed the 990
Theodora Long, Executive Director
Phone
(305) 361-6767
Return prepared by
Steven J Henriquez CPA LLC

Mission

The Marjory Stoneman Douglas Biscayne Nature Center, Inc. (MSDBNC) is a not-for-profit organization dedicated to environmental education and encouraging greater citizen participation in protecting our natural environment by connecting our community to the world through nature and the arts.

990 for the year ended September 30, 2025

Program accomplishments

  • We offered environmental education/art and nature programs either free or for a minimal fee $8 - $15. to over 15,000 students. We also provided adult programming through Art exhibits and Historic Storytelling Biscayne Bay Sunset Boat tours. There were another 5000 residents and visitors served. We offered 60 students from ages 8 - 12 a free one-month scholarship to Summer by the Sea camp. This included bus transportation and lunch. We gave 55 local artists the opportunity to exhibit their individual original art works in our Gallery. We organized 8 Saturdays of Weeding Warriors, cleaning up and weeding Crandon Park. We participated in 10 outreach community events - making information known about our local environmental conditions and solutions. Hosted 10 Teacher Workshops to bring local teachers up to date and renew their teacher credits for their certification.
    Expenses $273,123 · revenue $126,088
  • Provided summer camp to over 75 youth campers.
    Expenses $46,735 · revenue $19,369
  • Provide support to aid in overall maintenance and improvement of Crandon Park
    Expenses $12,935

What it must file and when

IRS records say it files Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N. Its accounting year ends in September, so each return is due on the 15th day of the 5th month after that.

Tax yearYear endedDueIRS public records
2025September 30, 2026February 16, 2027Not due yet
2024September 30, 2025February 17, 2026990 on file
2023September 30, 2024February 18, 2025990 on file

IRS record

EIN
59-2549600
Tax-exempt status
501(c)(3): Charitable, religious, educational or scientific organization
Foundation status
Publicly supported organization (170(b)(1)(A)(vi))
Donations deductible (Pub 78)
Public charity, 50% deduction limit
Exempt since
1987
Accounting year ends
September
Files
Form 990 or 990-EZ
Category (NTEE)
Environment (C600)
Assets (IRS master file)
$578,875
Income (IRS master file)
$460,661

Filing history

FormYear endedRevenueExpensesAssetsReturn
990September 2025$456,680$457,728$578,875IRS
990September 2024$525,253$530,346$594,120XML
990September 2023$426,113$500,480$585,330XML
990September 2022$440,388$314,355$656,064IRS
990September 2021–––IRS
990September 2020–––IRS
990September 2019–––IRS
990September 2018–––IRS

990-N: the IRS bulk file holds only the latest e-Postcard per organization; earlier years come from archived copies of that file since 2020 and can have gaps (the IRS e-Postcard search lists every one). 990, 990-EZ, 990-PF, 990-T: every e-filed return in the IRS e-file index since 2019; XML for the latest three processing years, amounts from the IRS Statistics of Income extracts before that. PDF copies and determination letters at the IRS (search EIN 59-2549600).

Questions about MARJORY STONEMAN DOUGLAS BISCAYNE NATURE CENTER

What is the EIN of MARJORY STONEMAN DOUGLAS BISCAYNE NATURE CENTER?
The employer identification number (EIN) of MARJORY STONEMAN DOUGLAS BISCAYNE NATURE CENTER is 59-2549600.
Is MARJORY STONEMAN DOUGLAS BISCAYNE NATURE CENTER tax-exempt?
Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1987.
Are donations to MARJORY STONEMAN DOUGLAS BISCAYNE NATURE CENTER tax-deductible?
Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
Which annual return does MARJORY STONEMAN DOUGLAS BISCAYNE NATURE CENTER file?
Form 990 or 990-EZ. Based on its last return; a smaller organization may file the 990-N.
When is the next return of MARJORY STONEMAN DOUGLAS BISCAYNE NATURE CENTER due?
The return for tax year 2025 (the year ending September 30, 2026) is due February 16, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
When did MARJORY STONEMAN DOUGLAS BISCAYNE NATURE CENTER last file with the IRS?
The latest return in the IRS public files is the 990 for the year ended September 2025.
Who is the principal officer of MARJORY STONEMAN DOUGLAS BISCAYNE NATURE CENTER?
The 990 for the year ended September 30, 2025 names Theodora Long.
Who are the officers and directors of MARJORY STONEMAN DOUGLAS BISCAYNE NATURE CENTER?
The 990 for the year ended September 30, 2025 lists 12 people; 1 received compensation from the organization, the highest $115,500 (Theodora Long, Executive Director).
How much revenue does MARJORY STONEMAN DOUGLAS BISCAYNE NATURE CENTER have?
On its 990 for the year ended September 30, 2025 it reported revenue of $456,680, expenses of $457,728 and total assets of $578,875 at year end.

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