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CENTER FOR OPEN SCIENCE

EIN 46-1496217 CHARLOTTESVLE, VA

Revenue 2024
$10,217,166
Expenses 2024
$8,787,031

Program services were 84.6% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
U03
Classification
1000
Street
2857 STRATFORD GLEN WAY

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).

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.

  • GEORGE BANKS

    CHAIR

    Total calculated
    $0
    Hours/week
    1

  • REBECCA SAXE

    VICE CHAIR

    Total calculated
    $0
    Hours/week
    1

  • JON HILL

    TREASURER

    Total calculated
    $0
    Hours/week
    1

  • MATTHEW BUYS

    MEMBER-AT-LARGE

    Total calculated
    $0
    Hours/week
    1

  • ELAINE CHEN

    MEMBER-AT-LARGE

    Total calculated
    $0
    Hours/week
    1

  • ADIB CHOUDHURY

    MEMBER-AT-LARGE

    Total calculated
    $0
    Hours/week
    1

  • ALISON MUDDITT

    MEMBER-AT-LARGE

    Total calculated
    $0
    Hours/week
    1

  • DAMIAN PATTISON

    MEMBER-AT-LARGE

    Total calculated
    $0
    Hours/week
    1

  • SUSANNA-ASSUNTA SANSONE

    MEMBER-AT-LARGE

    Total calculated
    $0
    Hours/week
    1

  • YVETTE SEGER

    MEMBER-AT-LARGE

    Total calculated
    $0
    Hours/week
    1

  • ELAINE WESTBROOKS

    MEMBER-AT-LARGE

    Total calculated
    $0
    Hours/week
    1

  • BRIAN NOSEK

    EXECUTIVE DIRECTOR

    Total calculated
    $262,600
    From this org
    $252,500
    From related orgs
    $0
    Other
    $10,100
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $252,500
    Bonus
    $0
    Other
    $0
    Deferred
    $10,100
    Nontaxable benefits
    $0
    Filer's total
    $262,600

  • LISA CUEVAS SHAW

    COO & MANAGING DIRECTOR

    Total calculated
    $208,029
    From this org
    $200,028
    From related orgs
    $0
    Other
    $8,001
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $200,028
    Bonus
    $0
    Other
    $0
    Deferred
    $8,001
    Nontaxable benefits
    $0
    Filer's total
    $208,029

  • NICOLE PFEIFFER

    CHIEF PRODUCT OFFICER

    Total calculated
    $186,854
    From this org
    $179,667
    From related orgs
    $0
    Other
    $7,187
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $179,667
    Bonus
    $0
    Other
    $0
    Deferred
    $7,187
    Nontaxable benefits
    $0
    Filer's total
    $186,854

  • OSMAND CHRISTIAN

    SR. DIRECTOR OF ENGINEERING

    Total calculated
    $191,797
    From this org
    $175,345
    From related orgs
    $0
    Other
    $16,452
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $175,345
    Bonus
    $0
    Other
    $0
    Deferred
    $7,045
    Nontaxable benefits
    $9,407
    Filer's total
    $191,797

  • TIM ERRINGTON

    SR. DIRECTOR OF RESEARCH

    Total calculated
    $148,158
    From this org
    $142,029
    From related orgs
    $0
    Other
    $6,129
    Hours/week
    40

  • MATTHEW FRAZIER

    PRINCIPAL SOFTWARE ENGINEER

    Total calculated
    $154,177
    From this org
    $136,777
    From related orgs
    $0
    Other
    $17,400
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $136,777
    Bonus
    $0
    Other
    $0
    Deferred
    $5,579
    Nontaxable benefits
    $11,821
    Filer's total
    $154,177

  • BRIAN PILATI

    MANAGER SOFTWARE ENGINEERING

    Total calculated
    $147,984
    From this org
    $132,291
    From related orgs
    $0
    Other
    $15,693
    Hours/week
    40

  • FITZHUGH ELLIOTT

    MANAGER SOFTWARE ENGINEERING

    Total calculated
    $143,639
    From this org
    $128,308
    From related orgs
    $0
    Other
    $15,331
    Hours/week
    40

  • BRIAN GEIGER

    SR. MANAGER SOFTWARE ENGINEERING

    Total calculated
    $145,464
    From this org
    $127,353
    From related orgs
    $0
    Other
    $18,111
    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
    $10,217,166
    Expenses
    $8,787,031
    Contributions
    $9,716,021
    Grants paid
    $247,658
  • 2023
    Revenue
    $8,081,750
    Expenses
    $7,479,640
    Contributions
    $7,632,452
    Grants paid
    $220,568
  • 2022
    Revenue
    $7,585,203
    Expenses
    $6,936,991
    Contributions
    $7,249,473
    Grants paid
    $76,307

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.

Grants made

Where these grants went next →

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 10 September 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 IRS Business Master File ingested 5 October 2026, which is when the registration facts above were last refreshed for every organization. Returns through tax year 2024, the newest we have parsed for this organization.