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OCEANIC SOCIETY EXPEDITIONS

EIN 94-3105570 ROSS, CA

Browse the largest nonprofits in California

Revenue 2024
$4,895,370
Expenses 2024
$4,513,781

Program services were 89.1% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
Classification
1000
Street
30 SIR FRANCIS DRAKE BLVD

These codes are the IRS's own and are shown exactly as filed. What each one means is in the Business Master File documentation (opens in a new tab).

Other organizations at this address

1 other organization in the IRS Business Master File lists the same street address. matched by us

We match the street line and ZIP code as the IRS gives them, ignoring case and outer spaces and nothing else, so "AVE" and "AVENUE" count as different streets and this list can miss some. A shared address can mean related organizations or a shared office, but it can also be a registered agent, a mail drop or a service provider holding mail for unrelated clients. It is not, by itself, evidence that two organizations are connected.

Mission and programs · 2024

Mission

Our mission is to conserve marine wildlife and habitats by deepening the connections between people and nature.

  • Education programs - a variety of programs to explore, discover and better understand the marine environment. Research projects - related to public policy interests such as endangered marine species, resource management, etc. Conserving ocean wildlife is central to our mission. Endangered marine species such as sea turtles, whales, sharks, and manatees not only help maintain healthy oceans, they also captivate public interest and galvanize support that can lead to the protection of entire ecosystems.

    Expenses $4,021,605 · Revenue $4,322,745

As filed on the 2024 return.

Officers and directors · 2024

As listed in Part VII of the 2024 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • Zachary D Rabinor

    Chair

    Total calculated
    $0
    Hours/week
    1
  • Dr Charles Betlach 11

    Vice Chair

    Total calculated
    $0
    Hours/week
    1
  • Finn Torgrimsen Longinotto

    Director

    Total calculated
    $0
    Hours/week
    1
  • Dr Sylvia Earle

    Director

    Total calculated
    $0
    Hours/week
    1
  • Hari Balasubramanian

    Director

    Total calculated
    $0
    Hours/week
    1
  • Mark Stanley

    Director

    Total calculated
    $0
    Hours/week
    1
  • Roderic B Mast

    President & CEO

    Total calculated
    $205,597
    From this org
    $205,597
    From related orgs
    $0
    Other
    $0
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $205,597
    Bonus
    $0
    Other
    $0
    Deferred
    $0
    Nontaxable benefits
    $0
    Filer's total
    $205,597
  • Brian Hutchinson

    Co-CEO

    Total calculated
    $145,000
    From this org
    $145,000
    From related orgs
    $0
    Other
    $0
    Hours/week
    40
  • Nicole Bouharb

    VP OF Finance and Operations

    Total calculated
    $139,634
    From this org
    $139,634
    From related orgs
    $0
    Other
    $0
    Hours/week
    40
  • Wayne Sentman

    Director, Conservation Travel Program

    Total calculated
    $116,878
    From this org
    $116,878
    From related orgs
    $0
    Other
    $0
    Hours/week
    40

Compensation is as filed in Part VII: reportable pay from this organization and from related organizations, other compensation, and hours per week. The total, marked calculated, is our sum of the three dollar columns, with a blank column counted as $0; the form itself has no total. On a Form 990-EZ the columns are Part IV's instead, and on a Form 990-PF Part VIII's — compensation, contributions to benefit plans, and expense account — and the total sums those. A Schedule J breakdown is as filed: base pay, bonus, other, deferred compensation and nontaxable benefits from this organization, with any from related organizations beside each, and the filer's own total. It is shown with the Part VII listing of the same name on the same return. The form gives no key between the two, so that pairing is ours, and is marked matched by us. Earlier years are each on their own filing page.

Filings

  • 2024
    Revenue
    $4,895,370
    Expenses
    $4,513,781
    Contributions
    $1,223,895
    Grants paid
    $0
  • 2023
    Revenue
    $4,053,227
    Expenses
    $3,170,956
    Contributions
    $681,189
    Grants paid
    $0
  • 2022
    Revenue
    $3,907,816
    Expenses
    $3,513,461
    Contributions
    $341,715
    Grants paid
    $0

The four totals the IRS asks for on Part I of the Form 990, as filed. A dash means the figure was not present on the return — not that it was zero.

Other returns filed

  • 2021 · 990

    Revenue
    $2,603,859
    Expenses
    $2,152,582
    Assets (EOY)
    $2,130,316
  • 2021 · 990

    Revenue
    $2,603,859
    Expenses
    $2,152,582
    Assets (EOY)
    $2,130,316
  • 2020 · 990

    Revenue
    $1,070,677
    Expenses
    $1,362,671
    Assets (EOY)
    $1,543,344
  • 2019 · 990

    Revenue
    $2,943,338
    Expenses
    $3,864,268
    Assets (EOY)
    $1,514,309
  • 2018 · 990

    Revenue
    $3,241,774
    Expenses
    $3,033,302
    Assets (EOY)
    $3,221,486
  • 2017 · 990

    Revenue
    $2,071,870
    Expenses
    $2,051,783
    Assets (EOY)
    $2,947,478
  • 2016 · 990

    Revenue
    $1,882,952
    Expenses
    $1,868,534
    Assets (EOY)
    $2,362,174
  • 2015 · 990

    Revenue
    $2,374,435
    Expenses
    $2,565,181
    Assets (EOY)
    $1,808,315
  • 2014 · 990

    Revenue
    $1,937,545
    Expenses
    $1,887,523
    Assets (EOY)
    $2,115,014
  • 2013 · 990

    Revenue
    $1,385,318
    Expenses
    $1,514,959
    Assets (EOY)
    $1,945,744

Nonprofiteer parses Forms 990, 990-EZ and 990-PF, in a window of recent tax years. These returns are recorded from the IRS e-file index, so their figures were extracted by that index rather than read from the return here — treat them as a different source from the filings above, not as more of the same record. A dash means the index carries no figure; Form 990-T listings carry none at all. Showing the 10 most recent; the API carries the rest.

Grants made

No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.

Grants received

The 10 largest by cash amount. The API serves every itemized grant.

Other IRS files

Auto-Revocation List

Not listed. The IRS publishes this list for organizations whose exemption was automatically revoked for failing to file for three consecutive years.

Publication 78

Listed as of 11 November 2026, under deductibility PC.

These are two separate IRS files on two separate schedules, shown as published and not reconciled with each other. Neither is a statement about whether a contribution is deductible today: 19,245 organizations appear in Publication 78 while the IRS's own revocation file lists them as currently revoked, more than half of those revoked before 2019. Absence from Publication 78 is evidence of nothing, and presence is not evidence either. Verify current status with the IRS before relying on it.

What this page reflects

The registration facts above come from the IRS Business Master File published 9 November 2026 and read 9 November 2026, for every organization at once. Returns through tax year 2024, the newest we have parsed for this organization.