Nonprofit · EIN 48-1109700
INTERNATIONAL SOCIETY FOR REEF STUDIES
Also known as KS GEOLOGICAL SURVEY
Tax-exempt · TAVERNIER, FL 33070
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2024 | 990 | $139,910 | $81,124 | $58,786 | $504,246 | $0 | $504,246 |
| December 31, 2023 | 990-EZ | $175,874 | $100,580 | $75,294 | $445,384 | $0 | $445,384 |
Financial details: 990 for the year ended December 31, 2024
Revenue
- Contributions, gifts and grants
- $90,053
- Membership dues
- $52,699
- Program service revenue
- $23,831
- Investment income
- $26,026
- Other revenue
- $0
Expenses
- Grants and similar amounts paid
- $53,003
- Compensation of officers, directors and key employees
- $0
- Salaries, compensation and benefits (total)
- $0
- Professional fundraising fees
- $0
- Program services (functional)
- $81,124
Balance sheet and other
- Total assets, start of year
- $445,460
- Total assets, end of year
- $504,246
- Total liabilities, end of year
- $0
- Net assets, end of year
- $504,246
- Publicly traded securities
- $221,683
- Gross receipts
- $139,910
- Employees
- 0
- Volunteers
- 5
- Year formed
- 1995
- 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 December 31, 2024, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Christian Voolstra | president Officer | 5 | $0 |
| Tracey Ainsworth | Vice President Officer | 1 | $0 |
| Anderson Mayfield | treasurer Officer | 20 | $0 |
| Mark Eakin | corresponding secretary Officer | 5 | $0 |
| Anastazia Banaszak | recording secretary Officer | 1 | $0 |
990-EZ for the year ended December 31, 2023: 5 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| Christian Voolstra | president | 30 | $0 |
| Tracey Ainsworth | Vice President | 5 | $0 |
| Anderson Mayfield | treasurer | 30 | $0 |
| Mark Eakin | corresponding secretary | 20 | $0 |
| Anastazia Banaszak | recording secretary | 10 | $0 |
Address and contacts
- Address (IRS master file)
- 89111 OVERSEAS HWY, TAVERNIER, FL 33070-2030
- In care of
- % DAPHNE G FAUTIN
- Principal officer (990 for 2024)
- Anderson Mayfield, 150 SE 25th Rd, Apt 5I, Miami, FL 33129
- Signed the 990
- Anderson Mayfield, treasurer
- Phone
- (786) 898-4447
- Website
- www.coralreefs.org
Mission
To advance the worldwide knowledge of coral reefs
Program accomplishments
- scientific grants to PhD students and post-docs. We also gave $1,500 to several of our "chapters," including the Mexican chapter and the European chapter. Read about our awards on our website: http://coralreefs. org/awards-and-honors/Expenses $53,003 · grants $53,005
- We paid 3757 for grantsmanship training for our membersExpenses $3,757
- other expenses to maintain a professional society (see table for details.).Expenses $13,396
- Paid for several of our volunteers to attend international conferences to represent our societyExpenses $10,968
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 December, so each return is due on the 15th day of the 5th month after that.
| Tax year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | December 31, 2025 | May 15, 2026 | Not on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990 on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990-EZ on file |
IRS record
- EIN
- 48-1109700
- Tax-exempt status
- 501(c)(3): Charitable, religious, educational or scientific organization
- Foundation status
- Publicly supported organization (509(a)(2))
- Donations deductible (Pub 78)
- Public charity, 50% deduction limit
- Exempt since
- 1995
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Environment (C053)
- Assets (IRS master file)
- $504,246
- Income (IRS master file)
- $139,910
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2024 | $139,910 | $81,124 | $504,246 | XML |
| 990-EZ | December 2023 | $175,874 | $100,580 | $445,384 | XML |
| 990 | December 2022 | $242,090 | $217,941 | $370,090 | IRS |
| 990-EZ | December 2021 | – | – | – | IRS |
| 990-EZ | December 2020 | – | – | – | IRS |
| 990-EZ | December 2018 | – | – | – | IRS |
| 990-EZ | December 2017 | – | – | – | 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 48-1109700).
Questions about INTERNATIONAL SOCIETY FOR REEF STUDIES
- What is the EIN of INTERNATIONAL SOCIETY FOR REEF STUDIES?
- The employer identification number (EIN) of INTERNATIONAL SOCIETY FOR REEF STUDIES is 48-1109700.
- Is INTERNATIONAL SOCIETY FOR REEF STUDIES tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1995.
- Are donations to INTERNATIONAL SOCIETY FOR REEF STUDIES tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does INTERNATIONAL SOCIETY FOR REEF STUDIES 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 INTERNATIONAL SOCIETY FOR REEF STUDIES due?
- The return for tax year 2025 (the year ending December 31, 2025) is due May 15, 2026. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did INTERNATIONAL SOCIETY FOR REEF STUDIES last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended December 2024.
- Who is the principal officer of INTERNATIONAL SOCIETY FOR REEF STUDIES?
- The 990 for the year ended December 31, 2024 names Anderson Mayfield.
- Who are the officers and directors of INTERNATIONAL SOCIETY FOR REEF STUDIES?
- The 990 for the year ended December 31, 2024 lists 5 people; 0 received compensation from the organization.
- How much revenue does INTERNATIONAL SOCIETY FOR REEF STUDIES have?
- On its 990 for the year ended December 31, 2024 it reported revenue of $139,910, expenses of $81,124 and total assets of $504,246 at year end.
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