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TUMBLEHOME INC

EIN 82-4411465 NEWTON, MA

Largest nonprofits in Massachusetts

Revenue 2024
$1,368,188
Expenses 2024
$1,269,290

Program services were 80.6% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
B90
Classification
1200
Street
288 WALNUT ST STE 500

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 · 2024

Mission

TO INSPIRE YOUNG PEOPLE TO IMAGINE THEMSELVES AS SCIENTISTS AND ENGINEERS THROUGH THE POWER OF STORY AND ACTIVITIES

  • RESEARCH, DESIGN AND DISTRIBUTION OF VARIOUS SCIENCE RELATED BOOKS FOR EDUCATION PURPOSES

    Expenses $37,743 · Revenue $37,083

  • STEM EDUCATION RESEARCH AND PROGRAMMING

    Expenses $985,868 · Grants $619,462

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.

  • Walter Simson

    PRESIDENT

    Total calculated
    $0
    Hours/week
    2

  • Steve Rasmussen

    TREASURER

    Total calculated
    $0
    Hours/week
    1

  • Pendred Noyce

    SECRETARY

    Total calculated
    $82,586
    From this org
    $77,596
    From related orgs
    $0
    Other
    $4,990
    Hours/week
    40

  • Gretchen Walker

    MEMBER

    Total calculated
    $0
    Hours/week
    1

  • Barnas Monteith

    RESEARCH

    Total calculated
    $127,519
    From this org
    $120,195
    From related orgs
    $0
    Other
    $7,324
    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. Earlier years are each on their own filing page.

Filings

  • 2024
    Revenue
    $1,368,188
    Expenses
    $1,269,290
    Contributions
    $1,327,652
    Grants paid
    $619,462
  • 2023
    Revenue
    $561,465
    Expenses
    $857,848
    Contributions
    $498,742
    Grants paid
    $125,150
  • 2022
    Revenue
    $614,062
    Expenses
    $555,928
    Contributions
    $417,406
    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
    $548,810
    Expenses
    $514,255
    Assets (EOY)
    $252,766

  • 2020 · 990

    Revenue
    $401,309
    Expenses
    $395,069
    Assets (EOY)
    $229,219

  • 2019 · 990

    Revenue
    $379,061
    Expenses
    $224,303
    Assets (EOY)
    $212,920

  • 2018 · 990-EZ

    Revenue
    $143,650
    Expenses
    $91,053
    Assets (EOY)
    $56,402

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.

Grants made

  • MCLEAN HOSPITAL

    $250,000

    2024 ASSISTANCE WITH STEM EDUCATION RESEARCH

  • PEAR & CLOVER INC

    $250,000

    2024 ASSISTANCE WITH STEM EDUCATION RESEARCH

  • STEM NEXT OPPORTUNITY FUND

    $100,000

    2024 ASSISTANCE WITH STEM EDUCATION RESEARCH

  • MCCLEAN HOSPITAL

    $45,000

    2023 ASSISTANCE WITH STEM EDUCATION RESEARCH

  • STRATEGIC LEARNING PARTNERSHIP

    $26,700

    2023 ASSISTANCE WITH STEM EDUCATION RESEARCH

  • THE CONCORD CONSORTIUM

    $19,462

    2024 ASSISTANCE WITH STEM EDUCATION RESEARCH

Where these grants went next →

Grants received

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 1 November 2026, for every organization at once. Returns through tax year 2024, the newest we have parsed for this organization.