ORGANIZATION FOR TROPICAL STUDIES INC

DURHAM, NC, 27705 (919) 684-5774 Est. 1963 EIN 56-2125831
Q055 - International & Foreign Affairs 990 - Public charity return 501(c)(3)
www.tropicalstudies.org

Mission

THE ORGANIZATION FOR TROPICAL STUDIES, INC. (OTS) IS CHARTERED AS A NON PROFIT CORPORATION UNDER THE LAWS OF NORTH CAROLINA AND IS SUPPORTED BY A CONSORTIUM OF INSTITUTIONS OF HIGHER LEARNING IN NORTH, CENTRAL, AND SOUTH AMERICA, AUSTRALIA, AND SOUTH AFRICA. OTS'S PURPOSE IS TO SUSTAIN TROPICAL ECOSYSTEMS BY DRIVING SCIENTIFIC DISCOVERY AND KNOWLEDGE, BY ENRICHING HUMAN PERCEPTION OF NATURE, AND BY ENHANCING WORLDWIDE POLICY IN THE TROPICS.

Financials

Total Revenue
$9,701,537
Total Expenses
$8,798,295
Net Assets
$17,510,278
9 employees 25 volunteers
From latest filing (tax period ending 2025-06-30)

Financial Health

Operating Reserve
23.9 months Healthy
Net assets / monthly expenses
Year-over-Year Change
Revenue ↑ 5.2%
Expenses ↓ 10.8%
Revenue Sources
Contributions 61.3% Earned revenue 36.6% Investment 2.2%
Expense Breakdown
Program 82.8% Management 13.0% Fundraising 4.2%

Officers & Key Employees (21)

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Grants Received (56)

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Filing History (7 filings)

YearRevenueExpensesNet Assets
2024 990 - Public charity return
Jul 1, 2024 to Jun 30, 2025
$9,701,537 ↑$8,798,295$17,510,278
2023 990 - Public charity return
Jul 1, 2023 to Jun 30, 2024
$9,219,213 ↑$9,858,737$14,588,918
2022 990 - Public charity return
Jul 1, 2022 to Jun 30, 2023
$8,814,178 ↑$9,350,545$13,852,564
2021 990 - Public charity return
Jul 1, 2021 to Jun 30, 2022
$4,521,186 ↑$4,875,291$13,509,212
2020 990 - Public charity return
Jul 1, 2020 to Jun 30, 2021
$2,862,547 ↓$3,272,598$16,877,896
2019 990 - Public charity return
Jul 1, 2019 to Jun 30, 2020
$4,220,880 ↓$4,597,253$13,884,096
2017 990 - Public charity return
Jul 1, 2017 to Jun 30, 2018
$6,242,782 $7,481,398$15,535,053

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EIN: 56-2125831 · Source: IRS Form 990 e-file data