Nonprofit · EIN 58-2385869
INTERNATIONAL SEAKEEPERS SOCIETY INC
Tax-exempt · CORAL GABLES, FL 33134
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| December 31, 2025 | 990 | $8,006,477 | $7,033,771 | $972,706 | $12,799,578 | $1,949,084 | $10,850,494 |
| December 31, 2024 | 990 | $31,156,733 | $6,022,997 | $25,133,736 | $62,439,163 | $485,713 | $61,953,450 |
| December 31, 2023 | 990 | $17,809,535 | $3,829,158 | $13,980,377 | $103,729,003 | $2,485,202 | $101,243,801 |
Financial details: 990 for the year ended December 31, 2025
Revenue
- Contributions, gifts and grants
- $32,819,825
- of which government grants
- $24,384
- Membership dues
- $2,950
- Program service revenue
- $7,260,728
- Investment income
- $224,795
- Net gain from sales of assets
- $120,226
- Net income from fundraising events
- -$142,028
- Other revenue
- -$32,298,871
Expenses
- Grants and similar amounts paid
- $0
- Other salaries and wages
- $837,400
- Salaries, compensation and benefits (total)
- $837,400
- Professional fundraising fees
- $0
- Legal fees
- $22,304
- Accounting fees
- $18,365
- Travel
- $19,434
- Program services (functional)
- $6,440,000
- Management and general (functional)
- $386,344
- Fundraising (functional)
- $207,427
Balance sheet and other
- Total assets, start of year
- $62,439,163
- Total assets, end of year
- $12,799,578
- Total liabilities, end of year
- $1,949,084
- Net assets, end of year
- $10,850,494
- Land, buildings and equipment
- $644,512
- Publicly traded securities
- $2,817,774
- Net assets without donor restrictions
- $10,850,494
- Gross receipts
- $8,148,505
- Employees
- 14
- Volunteers
- 1,744
- Year formed
- 1998
- 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, 2025, highest compensation first.
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| ANTHONY GILBERT | CHIEF PROG. Officer | 40 | $126,346 |
| NORMA TREASE | DIRECTOR Trustee or director | 10 | $0 |
| MARK LUTHER | CHAIRMAN Trustee or director | 15 | $0 |
| PATTY ELKUS | VICE CHAIRMA Trustee or director, Officer | 8 | $0 |
| MICHAEL MOORE | CHAIRMAN EME Trustee or director, Officer | 25 | $0 |
| JAY WADE | CHAIRMAN Trustee or director, Officer | 30 | $0 |
| JULIAN CHANG | DIRECTOR Trustee or director | 10 | $0 |
990 for the year ended December 31, 2024: 7 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| ANTHONY GILBERT | CHIEF PROG. Officer | 40 | $120,385 |
| NORMA TREASE | DIRECTOR Trustee or director | 10 | $0 |
| MARK LUTHER | DIRECTOR Trustee or director | 4 | $0 |
| PATTY ELKUS | VICE CHAIRMA Trustee or director, Officer | 8 | $0 |
| MICHAEL MOORE | CHAIRMAN EME Trustee or director, Officer | 25 | $0 |
| JAY WADE | PRESIDENT & Trustee or director, Officer | 30 | $0 |
| JULIAN CHANG | DIRECTOR Trustee or director | 10 | $0 |
990 for the year ended December 31, 2023: 7 people
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| ANTHONY GILBERT | CHIEF PROGRA Officer | 40 | $113,077 |
| NORMA TREASE | DIRECTOR Trustee or director | 8 | $0 |
| MARK LUTHER | DIRECTOR Trustee or director | 4 | $0 |
| PATTY ELKUS | VICE CHAIRMA Trustee or director, Officer | 8 | $0 |
| MICHAEL MOORE | CHAIRMAN EME Trustee or director, Officer | 16 | $0 |
| JAY WADE | PRESIDENT & Trustee or director, Officer | 30 | $0 |
| JULIAN CHANG | DIRECTOR Trustee or director | 8 | $0 |
Address and contacts
- Address (IRS master file)
- 255 ARAGON AVE 3RD FLOOR, CORAL GABLES, FL 33134-5054
- Principal officer (990 for 2025)
- MARK LUTHER, 2180 BAYOU GRANDE BOULEVARD NE ST, PETERSBURG, FL 33703
- Signed the 990
- MARK LUTHER, CHAIRMAN
- Phone
- (786) 924-6209
- Website
- WWW.SEAKEEPERS.ORG
- Return prepared by
- GARCIA SANTA MARIA DE ARMAS TRUJILLO
Mission
THE INTERNATIONAL SEAKEEPERS SOCIETY PROMOTES OCEANOGRAPHIC RESEARCH, CONSERVATION AND EDUCATION THROUGH DIRECT INVOLVEMENT WITH THE YACHTING COMMUNITY. PROVIDING EDUCATIONAL RESOURCES AND HANDS-ON MARINE SCIENCE EXPERIENCES TO STUDENTS IS THE PRIMARY FOCUS FOR ENSURING THE FUTURE WELLBEING OF OUR PLANET. SEAKEEPERS ENABLES THE YACHTING COMMUNITY TO TAKE FULL ADVANTAGE OF THEIR UNIQUE POTENTIAL TO ADVANCE MARINE SCIENCES AND TO RAISE AWARENESS ABOUT GLOBAL OCEAN ISSUES.
Program accomplishments
- VESSEL CHARTER PROGRAM - A YACHT OR TENDER DONATED TO SEAKEEPERS IS IMMEDIATELY DELIVERED TO A CHARTERING AGENT. CHARTER REVENUE IS PAID TO SEAKEEPERS OVER THREE YEARS, WITH A PURCHASING OPTION AFTER THE TERM IS OVER. THE CHARTERING PROGRAM EASES THE BURDEN OF SIGNIFICANT COSTS OF KEEPING DONATED VESSELS AND FACILITATES SEAKEEPERS MISSION TO PRESERVE THE WORLDS OCEANS AND OFFERS RESEARCH PLATFORMS TO THE SCIENTIFIC COMMUNITY.Expenses $1,371,398
- DURING 2025, SIX HUNDRED AND NINE (609) ACTIVITIES WERE COMPLETED. EACH STRAND OF PROGRAMMING WAS RESPONSIBLE FOR CONTRIBUTING AS FOLLOWS. SEAKEEPERS COMPLETED 51 SCIENTIST-LED EXPEDITIONS WITH 204 TOTAL DAYS OF FIELD RESEARCH IN THE UNITED STATES, THE BRAZILIAN AMAZON, INDONESIA, AUSTRALIA, PITCAIRN ISLANDS, THE GALAPAGOS ISLANDS, COSTA RICA, NEW ZEALAND, SICILY, AND THE BAHAMAS. CITIZEN SCIENCE INITIATIVES WERE PROMINENT AND SEAKEEPERS INSTALLED 77 DATA LOGGERS THROUGH OUR COLLABORATION WITH THE GLOBAL PROGRAM, SEABED 2030 WHICH AIMS TO MAP THE SEABED FLOOR BY THE YEAR 2030. 19 EDNA SAMPLES WERE COLLECTED IN THE MEDITERRANEAN TO HELP TRACK WHITE SHARK PRESENCE AND MOVEMENT, WITH A TOTAL OF 317 CITIZEN SCIENCE ACTIVITIES. EDUCATIONAL OUTREACH ORGANIZED 110 ACTIVITIES THAT ALLOWED SEAKEEPERS STAFF TO ENGAGE WITH 3,461 STUDENTS AND 728 EDUCATORS, AND COLLABORATE WITH A TOTAL OF 85 SCHOOLS (AND ORGANIZATIONS) WITH 22% (19 OF 85) OF ENGAGEMENT COMING FROM TITLE I SCHOOLS. SEAKEEPERS ENGAGED IN 81 PUBLIC EVENTS, WHICH INCLUDED SCIENTIFIC SEMINARS, EDUCATIONAL EVENTS, SHORELINE AND UNDERWATER CLEANUPS, AND YACHTING INDUSTRY FUNCTIONS. SEAKEEPERS COMPLETED 50 CLEANUPS WITH 1,744 VOLUNTEERS FROM THE COMMUNITY RESULTING IN A COLLECTION OF 6,032 POUNDS OF MARINE DEBRIS REMOVED FROM THE ENVIRONMENT - A 7% INCREASE FROM THE PREVIOUS YEAR. SEAKEEPERS IS A GLOBAL NON-PROFIT ORGANIZATION WITH ITS HEADQUARTERS IN THE UNITED STATES AND CHAPTERS ALL AROUND THE WORLD, INCLUDING SEAKEEPERS ASIA, SEAKEEPERS UNITED KINGDOM, AND SEAKEEPERS SOUTH PACIFIC. SEAKEEPERS HEADQUARTERS (USA) COMPLETED 36 SCIENTIST-LED EXPEDITIONS, INCLUDING 112 AT-SEA RESEARCH DAYS, SAVING RESEARCHERS OVER 303,292 IN PROJECTED COSTS. ACROSS ALL CHAPTERS, THE ORGANIZATION CONTRIBUTED 79.1 MILLION DEPTH SOUNDING MEASUREMENTS TO SEABED 2030 AND ACTIVATED 30 VESSELS THROUGH THE U.S. CHAPTER IN PROGRAMMING. IN EDUCATION, SEAKEEPERS DELIVERED 86 PROGRAMS, DIRECTLY ENGAGING 2,281 STUDENTS AND REACHING 676 OTHERS THROUGH PARTNERSHIPS AND ONLINE LESSON PLANS, WHILE COLLABORATING WITH 685 EDUCATORS, 64 SCHOOLS, AND OVER 30 PARTNERS. ADDITIONALLY, SEAKEEPERS USA COMPLETED 47 CLEANUPS AND PARTICIPATED IN 73 EVENTS. SEAKEEPERS ASIA COMPLETED 14 ACTIVITIES, WITH 10 CITIZEN SCIENCE PROJECTS THAT REACHED OVER 170 STUDENTS THROUGH EDUCATIONAL PROGRAMS IN COLLABORATION WITH 14 SCHOOLS AND 9 EDUCATORS. IN 2025, THE CHAPTER LAUNCHED ITS INTERNATIONAL JUNIOR SEAKEEPERS PROGRAM, INCLUDING STUDENT PRESENTATIONS AT THE EARTH IN FOCUS FILM FESTIVAL. ANOTHER KEY MILESTONE WAS THE FOURTH OCEAN COLLECTIVE SUMMIT IN SINGAPORE, A TWO-DAY CONFERENCE THAT CONVENED 190 PARTICIPANTS AND 23 INTERNATIONAL SPEAKERS ACROSS SCIENCE, POLICY, BUSINESS, AND CONSERVATION. SEAKEEPERS UNITED KINGDOM COMPLETED 16 ACTIVITIES, ENGAGING OVER 180 STUDENTS THROUGH EDUCATIONAL PROGRAMS IN COLLABORATION WITH 5 SCHOOLS AND 26 EDUCATORS. IN 2025, THE CHAPTER LAUNCHED ITS RACES & RALLIES CAMPAIGN, ENABLING LARGE-SCALE CROWDSOURCED DATA COLLECTION THROUGH MAJOR EVENTS. THIS INITIATIVE EARNED NATIONAL RECOGNITION, WITH SEAKEEPERS UK RECEIVING GOLD AWARDS AT THE CORPORATE ENGAGEMENT AWARDS FOR BEST PRO-BONO WORK AND MOST INNOVATIVE CSR COLLABORATION. SEAKEEPERS SOUTH PACIFIC COMPLETED OVER 12 ACTIVITIES, REACHING MORE THAN 150 STUDENTS THROUGH EDUCATIONAL PROGRAMS IN COLLABORATION WITH MULTIPLE SCHOOLS AND 10 EDUCATORS. THE CHAPTER'S PARTNERSHIP WITH MANTA WATCH NEW ZEALAND ADVANCED REGIONAL MANTA RAY IDENTIFICATION AND POPULATION MONITORING, WHILE STRATEGIC COLLABORATIONS EXPANDED TO LEADING ORGANIZATIONS SUCH AS LIVE OCEAN, WWF-NEW ZEALAND, AND LEIGH MARINE LABORATORY.Expenses $5,068,602
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 | 990 on file |
| 2024 | December 31, 2024 | May 15, 2025 | 990 on file |
| 2023 | December 31, 2023 | May 15, 2024 | 990 on file |
IRS record
- EIN
- 58-2385869
- 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
- 1998
- Accounting year ends
- December
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Science and technology (U20)
- Assets (IRS master file)
- $12,799,578
- Income (IRS master file)
- $8,148,505
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | December 2025 | $8,006,477 | $7,033,771 | $12,799,578 | IRS |
| 990 | December 2024 | $31,156,733 | $6,022,997 | $62,439,163 | IRS |
| 990 | December 2023 | $17,809,535 | $3,829,158 | $103,729,003 | XML |
| 990 | December 2022 | -$389,903 | $3,212,841 | $124,841,392 | IRS |
| 990 | December 2021 | – | – | – | IRS |
| 990 | December 2020 | – | – | – | 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 58-2385869).
Questions about INTERNATIONAL SEAKEEPERS SOCIETY INC
- What is the EIN of INTERNATIONAL SEAKEEPERS SOCIETY INC?
- The employer identification number (EIN) of INTERNATIONAL SEAKEEPERS SOCIETY INC is 58-2385869.
- Is INTERNATIONAL SEAKEEPERS SOCIETY INC tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1998.
- Are donations to INTERNATIONAL SEAKEEPERS SOCIETY INC tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does INTERNATIONAL SEAKEEPERS SOCIETY INC 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 SEAKEEPERS SOCIETY INC due?
- The return for tax year 2026 (the year ending December 31, 2026) is due May 17, 2027. Form 8868 extends it by six months; the 990-N cannot be extended.
- When did INTERNATIONAL SEAKEEPERS SOCIETY INC last file with the IRS?
- The latest return in the IRS public files is the 990 for the year ended December 2025.
- Who is the principal officer of INTERNATIONAL SEAKEEPERS SOCIETY INC?
- The 990 for the year ended December 31, 2025 names MARK LUTHER.
- Who are the officers and directors of INTERNATIONAL SEAKEEPERS SOCIETY INC?
- The 990 for the year ended December 31, 2025 lists 7 people; 1 received compensation from the organization, the highest $126,346 (ANTHONY GILBERT, CHIEF PROG.).
- How much revenue does INTERNATIONAL SEAKEEPERS SOCIETY INC have?
- On its 990 for the year ended December 31, 2025 it reported revenue of $8,006,477, expenses of $7,033,771 and total assets of $12,799,578 at year end.
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