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STOCKHOLM ENVIRONMENT INSTITUTE USINC

EIN 20-4659308 SOMERVILLE, MA

Revenue 2025
$5,634,166
Expenses 2025
$6,081,763

Program services were 77.8% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
U050
Classification
2000
Street
11 CURTIS AVE

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).

Mission and programs · 2025

Mission

AN INTERNATIONAL NONPROFIT RESEARCH AND POLICY ORGANIZATION THAT TACKLES ENVIRONMENT AND DEVELOPMENT CHALLENGES.

  • SEI US HAS OFFICES IN SOMERVILLE, MASSACHUSETTS; DAVIS, CALIFORNIA; AND SEATTLE, WASHINGTON. THE CENTER CONDUCTS RESEARCH AND ENGAGES WITH DECISION-MAKERS AND CIVIL SOCIETY ON ENERGY, WATER, AND CLIMATE POLICY AS WELL AS ON BROADER DIMENSIONS OF DEVELOPMENT, SUSTAINABILITY, AND EQUITY. IT BUILDS CAPACITY THROUGH TRAINING AND COLLABORATION, AND ITS DECISION-SUPPORT TOOLS ARE USED WIDELY AROUND THE GLOBE.SEI US SUPPORTS DECISION-MAKING AND INDUCING CHANGE TOWARD SUSTAINABLE DEVELOPMENT AROUND THE WORLD BY PROVIDING KNOWLEDGE THAT BRIDGES SCIENCE AND POLICY IN THE FIELDS OF ENVIRONMENT AND DEVELOPMENT, AND BY CONDUCTING INNOVATIVE, INTEGRATED APPLIED SYSTEMS RESEARCH, WHICH FORMS THE BASIS FOR POLICY ADVICE, CAPACITY BUILDING, DECISION SUPPORT AND POLICY IMPLEMENTATION.

    Expenses $4,734,353 · Revenue $3,887,254

As filed on the 2025 return. The filer continues this part on Schedule O, which is not shown here.

Officers and directors · 2025

As listed in Part VII of the 2025 return, in the order the filer printed them. Each return names its own; this is not a roster the organization keeps with us.

  • MANS NILSSON

    CHAIR

    Total calculated
    $0
    Hours/week
    1

  • ERIC KANE

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • NIELS CRONE

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • ANDREW REVKIN

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • RACHEL CLEETUS

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • DANIELLE DEANE-RYAN

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • ELIZABETH SODERSTROM PHD

    DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • NICOLAS DI SBROIAVACCA

    FORMER DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • LINDA ABRIOLA PHD

    FORMER DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • EILEEN QUIGLEY

    FORMER DIRECTOR

    Total calculated
    $0
    Hours/week
    1

  • EDWARD CARR

    PRESIDENT & CENTER DIR.

    Total calculated
    $247,883
    From this org
    $236,284
    From related orgs
    $0
    Other
    $11,599
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $236,284
    Bonus
    $0
    Other
    $0
    Deferred
    $11,500
    Nontaxable benefits
    $99
    Filer's total
    $247,883

  • BONNIE COCKMAN

    TREASURER & DIR. OF FINANCE/OPS

    Total calculated
    $179,516
    From this org
    $171,213
    From related orgs
    $0
    Other
    $8,303
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $171,213
    Bonus
    $0
    Other
    $0
    Deferred
    $8,303
    Nontaxable benefits
    $0
    Filer's total
    $179,516

  • JOHN SIEBER

    CLERK & SENIOR SCIENTIST

    Total calculated
    $187,804
    From this org
    $179,253
    From related orgs
    $0
    Other
    $8,551
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $179,253
    Bonus
    $0
    Other
    $0
    Deferred
    $8,551
    Nontaxable benefits
    $0
    Filer's total
    $187,804

  • CHARLES HEAPS

    SENIOR SCIENTIST

    Total calculated
    $229,530
    From this org
    $204,509
    From related orgs
    $0
    Other
    $25,021
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $204,509
    Bonus
    $0
    Other
    $0
    Deferred
    $10,587
    Nontaxable benefits
    $14,434
    Filer's total
    $229,530

  • LAURA FORNI

    WATER PROGRAM DIRECTOR

    Total calculated
    $163,438
    From this org
    $155,713
    From related orgs
    $0
    Other
    $7,725
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $155,713
    Bonus
    $0
    Other
    $0
    Deferred
    $7,725
    Nontaxable benefits
    $0
    Filer's total
    $163,438

  • CHARLES YOUNG

    SENIOR SCIENTIST

    Total calculated
    $181,007
    From this org
    $150,790
    From related orgs
    $0
    Other
    $30,217
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $150,790
    Bonus
    $0
    Other
    $0
    Deferred
    $8,085
    Nontaxable benefits
    $22,132
    Filer's total
    $181,007

  • JASON VEYSEY

    SENIOR SCIENTIST

    Total calculated
    $202,341
    From this org
    $170,090
    From related orgs
    $0
    Other
    $32,251
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $170,090
    Bonus
    $0
    Other
    $0
    Deferred
    $8,954
    Nontaxable benefits
    $23,297
    Filer's total
    $202,341

  • HENDRIK BROEKHOFF

    SENIOR SCIENTIST

    Total calculated
    $169,909
    From this org
    $161,824
    From related orgs
    $0
    Other
    $8,085
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $161,824
    Bonus
    $0
    Other
    $0
    Deferred
    $8,085
    Nontaxable benefits
    $0
    Filer's total
    $169,909

  • ROBERT BAILIS

    SENIOR SCIENTIST

    Total calculated
    $185,716
    From this org
    $154,263
    From related orgs
    $0
    Other
    $31,453
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $154,263
    Bonus
    $0
    Other
    $0
    Deferred
    $8,156
    Nontaxable benefits
    $23,297
    Filer's total
    $185,716

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

  • 2025
    Revenue
    $5,634,166
    Expenses
    $6,081,763
    Contributions
    $1,585,539
    Grants paid
    $0
  • 2024
    Revenue
    $5,559,480
    Expenses
    $6,268,381
    Contributions
    $1,770,861
    Grants paid
    $0
  • 2023
    Revenue
    $7,139,766
    Expenses
    $6,561,878
    Contributions
    $3,486,921
    Grants paid
    $0
  • 2022
    Revenue
    $5,886,222
    Expenses
    $6,119,162
    Contributions
    $4,172,170
    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
    $5,787,254
    Expenses
    $5,509,329
    Assets (EOY)
    $5,389,275

  • 2020 · 990

    Revenue
    $5,906,753
    Expenses
    $4,931,015
    Assets (EOY)
    $5,418,926

  • 2019 · 990

    Revenue
    $5,481,068
    Expenses
    $5,405,543
    Assets (EOY)
    $3,645,050

  • 2018 · 990

    Revenue
    $5,726,152
    Expenses
    $5,568,727
    Assets (EOY)
    $3,505,601

  • 2017 · 990

    Revenue
    $5,732,461
    Expenses
    $5,740,757
    Assets (EOY)
    $3,411,535

  • 2016 · 990

    Revenue
    $5,533,809
    Expenses
    $5,109,325
    Assets (EOY)
    $3,639,887

  • 2015 · 990

    Revenue
    $5,111,960
    Expenses
    $4,789,585
    Assets (EOY)
    $3,036,979

  • 2014 · 990

    Revenue
    $4,848,534
    Expenses
    $4,975,127
    Assets (EOY)
    $3,042,206

  • 2013 · 990

    Revenue
    $4,341,544
    Expenses
    $4,250,001
    Assets (EOY)
    $2,687,483

  • 2012 · 990

    Revenue
    not reported
    Expenses
    $3,939,979
    Assets (EOY)
    $2,584,176

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 13 October 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 13 October 2026 and read 23 October 2026, for every organization at once. Returns through tax year 2025, the newest we have parsed for this organization.