Nonprofit · EIN 51-0144434
MARINE MAMMAL CENTER
Also known as MARIN HEADLANDS
Tax-exempt · SAUSALITO, CA 94965
Financials
| Year ended | Form | Revenue | Expenses | Net income | Total assets | Liabilities | Net assets |
|---|---|---|---|---|---|---|---|
| September 30, 2025 | 990 | $18,607,476 | $23,416,223 | -$4,808,747 | $50,014,115 | $4,749,279 | $45,264,836 |
| September 30, 2024 | 990 | $22,939,156 | $22,993,706 | -$54,550 | $54,920,550 | $4,849,598 | $50,070,952 |
| September 30, 2023 | 990 | $20,472,796 | $20,960,826 | -$488,030 | $50,835,663 | $1,929,979 | $48,905,684 |
Financial details: 990 for the year ended September 30, 2025
Revenue
- Contributions, gifts and grants
- $16,478,520
- of which government grants
- $1,445,517
- Program service revenue
- $309,445
- Investment income
- $1,575,900
- Net rental income
- -$71,472
- Net gain from sales of assets
- $772,768
- Net income from sales of inventory
- $260,869
- Other revenue
- $243,611
Expenses
- Grants and similar amounts paid
- $0
- Compensation of officers, directors and key employees
- $532,925
- Other salaries and wages
- $10,795,342
- Salaries, compensation and benefits (total)
- $13,618,911
- Professional fundraising fees
- $687,235
- Accounting fees
- $94,185
- Occupancy
- $778,303
- Travel
- $387,957
- Depreciation
- $2,226,108
- Program services (functional)
- $18,560,573
- Management and general (functional)
- $2,029,060
- Fundraising (functional)
- $2,826,590
Balance sheet and other
- Total assets, start of year
- $54,920,550
- Total assets, end of year
- $50,014,115
- Total liabilities, end of year
- $4,749,279
- Net assets, end of year
- $45,264,836
- Land, buildings and equipment
- $24,577,186
- Publicly traded securities
- $22,104,701
- Net assets without donor restrictions
- $41,147,396
- Net assets with donor restrictions
- $4,117,440
- Gross receipts
- $37,983,249
- Employees
- 156
- Volunteers
- 1,200
- Year formed
- 1975
- State of legal domicile
- CA
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.
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| CECILY MAJERUS | CHIEF EXECUTIVE OFFICER Officer | 40 | $277,566 | $32,207 |
| JEFFREY BOEHM | CHIEF EXTERNAL RELATIONS OFFICER Highest-paid employee | 40 | $284,594 | $9,012 |
| DOMINIC TRAVIS | CHIEF PROGRAM OFFICER Highest-paid employee | 40 | $256,494 | $16,996 |
| STEPHANIE LADEIRA | CHIEF ADVANCEMENT OFFICER Highest-paid employee | 40 | $242,819 | $25,433 |
| MARVIN SUCHOFF | CHIEF FINANCIAL OFFICER Officer | 40 | $205,961 | $26,689 |
| ROBYN HETTRICH | CHIEF PEOPLE & CULTURE OFFICER Highest-paid employee | 40 | $196,728 | $27,324 |
| PATRICK DUIGNAN | DIRECTOR OF PATHOLOGY Highest-paid employee | 40 | $154,149 | $16,624 |
| JULIAN BRANDES | CHAIR Trustee or director, Officer | 3 | $0 | $0 |
| JOSH COPP | VICE-CHAIR Trustee or director, Officer | 2 | $0 | $0 |
| GREG FRIEDMAN | TREASURER Trustee or director, Officer | 2 | $0 | $0 |
| BETTY HASLER | SECRETARY Trustee or director, Officer | 1 | $0 | $0 |
| BRENDA BOTTUM | DIRECTOR Trustee or director | 2 | $0 | $0 |
| JENNIFER BUSHMAN | DIRECTOR Trustee or director | 1 | $0 | $0 |
| SUSIE CAMPBELL | DIRECTOR Trustee or director | 2 | $0 | $0 |
| HOWARD CARO | DIRECTOR Trustee or director | 1 | $0 | $0 |
9 more people on this return
| Name | Title | Hours / week | Compensation |
|---|---|---|---|
| NATHAN ETTER | DIRECTOR Trustee or director | 1 | $0 |
| JAKE HEATH | DIRECTOR Trustee or director | 1 | $0 |
| CHRIS LUNDQUIST | DIRECTOR Trustee or director | 1 | $0 |
| DOUG MAGOWAN | DIRECTOR Trustee or director | 1 | $0 |
| MERRILL MAGOWAN | DIRECTOR (THRU 4/25) Trustee or director | 1 | $0 |
| GLEN MATHISON | DIRECTOR Trustee or director | 2 | $0 |
| CARLENE MENDIETA | DIRECTOR Trustee or director | 1 | $0 |
| PHILIP UPTON | DIRECTOR Trustee or director | 2 | $0 |
| SANDOR STRAUS | DIRECTOR Trustee or director | 1 | $0 |
990 for the year ended September 30, 2024: 25 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| CECILY MAJERUS | CHIEF EXECUTIVE OFFICER Officer | 40 | $278,265 | $28,420 |
| JEFFREY BOEHM | CHIEF EXTERNAL RELATIONS OFFICER Highest-paid employee | 40 | $284,325 | $8,568 |
| DOMINIC TRAVIS | CHIEF PROGRAM OFFICER Highest-paid employee | 40 | $270,387 | $7,385 |
| MARVIN SUCHOFF | CHIEF FINANCIAL OFFICER Officer | 40 | $206,590 | $22,901 |
| ROBYN HETTRICH | CHIEF PEOPLE & CULTURE OFFICER Highest-paid employee | 40 | $196,193 | $15,865 |
| JENNIFER SACHS | DIRECTOR OF DEVELOPMENT (THRU 07/24) Highest-paid employee | 40 | $141,316 | $31,469 |
| PATRICK DUIGNAN | DIRECTOR OF PATHOLOGY Highest-paid employee | 40 | $147,573 | $13,838 |
| JULIAN BRANDES | CHAIR Trustee or director, Officer | 3 | $0 | $0 |
| JOSH COPP | VICE CHAIR Trustee or director, Officer | 2 | $0 | $0 |
| GREG FRIEDMAN | TREASURER Trustee or director, Officer | 2 | $0 | $0 |
| BETTY HASLER | SECRETARY Trustee or director, Officer | 1 | $0 | $0 |
| BRENDA BOTTUM | DIRECTOR Trustee or director | 2 | $0 | $0 |
| JENNIFER BUSHMAN | DIRECTOR Trustee or director | 1 | $0 | $0 |
| SUSIE CAMPBELL | DIRECTOR Trustee or director | 2 | $0 | $0 |
| HOWARD CARO | DIRECTOR Trustee or director | 1 | $0 | $0 |
| NATHAN ETTER | DIRECTOR Trustee or director | 1 | $0 | $0 |
| JAKE HEATH | DIRECTOR Trustee or director | 1 | $0 | $0 |
| CHRIS LUNDQUIST | DIRECTOR Trustee or director | 1 | $0 | $0 |
| DOUG MAGOWAN | DIRECTOR Trustee or director | 1 | $0 | $0 |
| MERRILL MAGOWAN | DIRECTOR Trustee or director | 1 | $0 | $0 |
| GLEN MATHISON | DIRECTOR Trustee or director | 2 | $0 | $0 |
| CARLENE MENDIETA | DIRECTOR Trustee or director | 1 | $0 | $0 |
| BRIAN PUTLER | DIRECTOR (THRU 12/23) Trustee or director | 1 | $0 | $0 |
| SANDOR STRAUS | DIRECTOR Trustee or director | 1 | $0 | $0 |
| PHILIP UPTON | DIRECTOR Trustee or director | 2 | $0 | $0 |
990 for the year ended September 30, 2023: 27 people
| Name | Title | Hours / week | Compensation | Other / benefits |
|---|---|---|---|---|
| WARNER JOHN | CHIEF DEVEL./COMM. OFF (THRU 11/22) Former | 40 | $373,079 | $14,820 |
| BOEHM JEFFREY | CHIEF EXTERNAL RELATIONS OFFICER Highest-paid employee | 40 | $283,271 | $8,700 |
| MAJERUS CECILY | CHIEF EXECUTIVE OFFICER Officer | 40 | $255,846 | $5,488 |
| TRAVIS DOMINIC | CHIEF PROGRAM OFFICER Highest-paid employee | 40 | $246,153 | $721 |
| SUCHOFF MARVIN | CHIEF FINANCIAL OFFICER Officer | 40 | $197,569 | $22,002 |
| SACHS JENNIFER | DIRECTOR OF DEVELOPMENT Highest-paid employee | 40 | $139,632 | $22,498 |
| DUIGNAN PATRICK | DIRECTOR OF PATHOLOGY Highest-paid employee | 40 | $138,871 | $12,654 |
| JULIAN BRANDES | CHAIR Trustee or director, Officer | 1 | $0 | $0 |
| JOSH COPP | VICE CHAIR Trustee or director, Officer | 1 | $0 | $0 |
| GREG FRIEDMAN | TREASURER Trustee or director, Officer | 1 | $0 | $0 |
| BETTY HASLER | SECRETARY Trustee or director, Officer | 1 | $0 | $0 |
| BRENDA BOTTOM | DIRECTOR Trustee or director | 1 | $0 | $0 |
| JENNIFER BUSHMAN | DIRECTOR Trustee or director | 1 | $0 | $0 |
| SUSIE CAMPBELL | DIRECTOR Trustee or director | 1 | $0 | $0 |
| HOWARD CARO | DIRECTOR Trustee or director | 1 | $0 | $0 |
| NATHAN ETTER | DIRECTOR Trustee or director | 1 | $0 | $0 |
| JEENY FREIRE-KU | DIRECTOR (THRU 2/23) Trustee or director | 1 | $0 | $0 |
| JAKE HEATH | DIRECTOR Trustee or director | 1 | $0 | $0 |
| JENNIFER LIVELY | DIRECTOR (THRU 2/23) Trustee or director | 1 | $0 | $0 |
| CHRIS LINDQUIST | DIRECTOR Trustee or director | 1 | $0 | $0 |
| MERRILL MAGOWAN | DIRECTOR Trustee or director | 1 | $0 | $0 |
| GLEN MATHISON | DIRECTOR Trustee or director | 1 | $0 | $0 |
| CARLENE MENDIETA | DIRECTOR Trustee or director | 1 | $0 | $0 |
| LISA PANTAGES | DIRECTOR (THRU 6/23) Trustee or director | 1 | $0 | $0 |
| BRIAN PUTLER | DIRECTOR Trustee or director | 1 | $0 | $0 |
| SANDOR STRAUS | DIRECTOR Trustee or director | 1 | $0 | $0 |
| PHILIP UPTON | DIRECTOR Trustee or director | 1 | $0 | $0 |
Address and contacts
- Address (IRS master file)
- 2000 BUNKER ROAD FORT CRONKHITE, SAUSALITO, CA 94965-0000
- Principal officer (990 for 2024)
- CECILY MAJERUS, 2000 BUNKER ROAD FORT CRONKHITE, SAUSALITO, CA 94965
- Signed the 990
- MITCHELL HOPSON, CFO
- Phone
- (415) 289-7325
- Website
- WWW.MARINEMAMMALCENTER.ORG
- Return prepared by
- ARMANINO ADVISORY LLC
California records
California keeps its own records of charities and corporations. Search them by EIN 51-0144434 or by the name MARINE MAMMAL CENTER.
- Attorney General, Registry of Charities and Fundraisers
- Registration status and filed reports (CT-TR-1, RRF-1)
- Secretary of State, bizfile Online
- Corporation status, entity number, agent for service
- Franchise Tax Board
- Entity status letter (state tax exemption, good standing)
Mission
THE MARINE MAMMAL CENTER ADVANCES GLOBAL OCEAN CONSERVATION THROUGH MARINE MAMMAL RESCUE AND REHABILITATION, SCIENTIFIC RESEARCH, AND EDUCATION. THE CENTER'S WORK IS GUIDED AND INSPIRED BY A SHARED VISION OF A HEALTHY OCEAN FOR MARINE MAMMALS AND HUMANS ALIKE.
Program accomplishments
- PROGRAM #1: RESCUE AND REHABILITATION: THE MARINE MAMMAL CENTER RESCUES AND REHABILITATES SICK AND INJURED MARINE MAMMALS AT ITS STATE-OF-THE-ART VETERINARY FACILITIES BY ENGAGING A DEDICATED WORKFORCE AND A SUPPORTIVE COMMUNITY. SINCE 1975, THE CENTER HAS RESPONDED TO MORE THAN 27,000 MARINE MAMMALS, INCLUDING SEA LIONS, ELEPHANT SEALS, HARBOR SEALS, FUR SEALS, SEA OTTERS, AND MORE. IN AN EFFORT TO SAVE HAWAIIAN MONK SEALS FROM EXTINCTION, THE CENTER OPENED THE FIRST-EVER REHABILITATION FACILITY DEVOTED TO THIS ENDANGERED SPECIES IN 2014, AND SINCE THEN HAS REHABILITATED NEARLY 30 PERCENT OF THE TOTAL POPULATION, WHICH IS ESTIMATED AT ABOUT 1,600 INDIVIDUALS. THE CENTER ADMITTED OVER 1,100 MARINE MAMMALS WITH THE HELP OF VOLUNTEERS WHO RECORDED MORE THAN 133,000 (CONTINUED IN SCHED O) VOLUNTEER HOURS SERVED, AN ESTIMATED WORKFORCE VALUE OF APPROXIMATELY $5.3 MILLION AS OF SEPTEMBER 30, 2025.Expenses $14,540,037 · revenue $134,021
- PROGRAM #2: EDUCATION: THE MARINE MAMMAL CENTER LEADS AS A TEACHING HOSPITAL BY TRAINING VETERINARY PROFESSIONALS LOCALLY AND INTERNATIONALLY, AND INSPIRING FUTURE OCEAN STEWARDS THROUGH INNOVATIVE SCHOOL AND PUBLIC EDUCATION PROGRAMS. IN 2025, THE CENTER ENGAGED MORE THAN 44,000 CHILDREN AND ADULTS THROUGH IN-PERSON PROGRAMMING WITH HANDS-ON TRAININGS, SUPPORTING THE NEXT GENERATION OF SCIENTISTS AND ENGAGED CITIZENS.Expenses $4,020,536 · revenue $436,293
- PROGRAM #3: SCIENTIFIC RESEARCH: THE MARINE MAMMAL CENTER LEARNS FROM THE PATIENTS IN ITS CARE AND CONTRIBUTES TO SCIENTIFIC UNDERSTANDING OF THE CHANGING HEALTH OF OUR OCEAN, TAKING ACTION TO ADDRESS OCEAN THREATS AND SAVE ENDANGERED SPECIES.
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 year | Year ended | Due | IRS public records |
|---|---|---|---|
| 2025 | September 30, 2026 | February 16, 2027 | Not due yet |
| 2024 | September 30, 2025 | February 17, 2026 | 990 on file |
| 2023 | September 30, 2024 | February 18, 2025 | 990 on file |
IRS record
- EIN
- 51-0144434
- 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
- 1995
- Accounting year ends
- September
- Files
- Form 990 or 990-EZ
- Category (NTEE)
- Animal-related (D30Z)
- Assets (IRS master file)
- $50,014,115
- Income (IRS master file)
- $37,983,249
Filing history
| Form | Year ended | Revenue | Expenses | Assets | Return |
|---|---|---|---|---|---|
| 990 | September 2025 | $18,607,476 | $23,416,223 | $50,014,115 | XML |
| 990 | September 2024 | $22,939,156 | $22,993,706 | $54,920,550 | XML |
| 990 | September 2023 | $20,472,796 | $20,960,826 | $50,835,663 | XML |
| 990 | September 2022 | $22,610,379 | $17,339,714 | $50,246,758 | IRS |
| 990 | September 2021 | – | – | – | IRS |
| 990 | September 2020 | – | – | – | IRS |
| 990 | September 2019 | – | – | – | IRS |
| 990 | September 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 51-0144434).
Questions about MARINE MAMMAL CENTER
- What is the EIN of MARINE MAMMAL CENTER?
- The employer identification number (EIN) of MARINE MAMMAL CENTER is 51-0144434.
- Is MARINE MAMMAL CENTER tax-exempt?
- Yes. The IRS lists it as tax-exempt under section 501(c)(3) since 1995.
- Are donations to MARINE MAMMAL CENTER tax-deductible?
- Yes. It is listed in IRS Publication 78 (Public charity, 50% deduction limit).
- Which annual return does MARINE MAMMAL 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 MARINE MAMMAL 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 MARINE MAMMAL 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 MARINE MAMMAL CENTER?
- The 990 for the year ended September 30, 2025 names CECILY MAJERUS.
- Who are the officers and directors of MARINE MAMMAL CENTER?
- The 990 for the year ended September 30, 2025 lists 24 people; 7 received compensation from the organization, the highest $277,566 (CECILY MAJERUS, CHIEF EXECUTIVE OFFICER).
- How much revenue does MARINE MAMMAL CENTER have?
- On its 990 for the year ended September 30, 2025 it reported revenue of $18,607,476, expenses of $23,416,223 and total assets of $50,014,115 at year end.
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