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LOWELL OBSERVATORY FOUNDATION

EIN 47-2052113 FLAGSTAFF, AZ

Revenue 2025
$1,876,603
Expenses 2025
$5,582,552

Program services were 98.7% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
U11
Classification
1000
Street
1400 W MARS HILL RD

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

TO SUSTAIN AND ENHANCE LOWELL OBSERVATORY'S MISSION OF RESEARCH AND EDUCATION BY GENERATING PERPETUAL FINANCIAL SUPPORT.

Activities or mission (Part I)

TO SUSTAIN AND ENHANCE LOWELL OBSERVATORY'S MISSION BY GENERATING PERPETUAL FINANCIAL SUPPORT.

  • THE LOWELL OBSERVATORY FOUNDATION (LOF) ACCEPTS GIFTS FOR ENDOWED FUNDS AND MANAGES THE FUNDS TO SUPPORT THE OBSERVATORY'S GENERAL OPERATIONS AND THE GROWTH OF THE ENDOWED FUNDS. IN 2025, THE FOUNDATION RECEIVED SEVERAL GENEROUS GIFTS, INCLUDING $319,000 TO SUSTAIN THE OBSERVATORY'S LIBRARY AND ARCHIVES. THE FOUNDATION ALSO RECEIVED AN ADDITIONAL $100,000 TO GROW THE COSMOLOGY RESEARCH ENDOWMENT. AS IN PAST YEARS, WE ALSO RECEIVED A NUMBER OF CONTRIBUTIONS TO GROW THE ADC ENDOWMENT. GIVEN UNCERTAIN MARKET TRENDS AND GLOBAL CONFLICTS, THE NEW GIFTS TO THE FOUNDATION IN 2025 WILL HELP GUARD AGAINST POTENTIAL CORRECTIONS OR DOWNTURNS IN 2026.

    Expenses $5,511,530 · Grants $5,511,530

As filed on the 2025 return.

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.

  • LOGAN BAYER

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2

  • CAMILLE BIBLES

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2

  • PATRICIA BOWDLER

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2

  • DAVID D CHASE

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2

  • W DAVID CONNELL

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2

  • NEIL GAVIN

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2

  • W LOWELL PUTNAM

    TRUSTEE

    Total calculated
    $21,069
    From this org
    $0
    From related orgs
    $12
    Other
    $21,057
    Hours/week
    2 + 32 related

  • DONNA WEISTROP

    TRUSTEE

    Total calculated
    $0
    Hours/week
    2

  • MARJORIE MCCLANAHAN

    BOARD CHAIR

    Total calculated
    $0
    Hours/week
    2

  • GEORGE PUTNAM III

    BOARD VICE-CHAIR

    Total calculated
    $0
    Hours/week
    2

  • LESLIE CURRIE

    EXECUTIVE DIRECTOR

    Total calculated
    $216,071
    From this org
    $0
    From related orgs
    $190,704
    Other
    $25,367
    Hours/week
    2 + 38 related

    Schedule J breakdown matched by us

    Base
    $0 + $190,704 related
    Bonus
    $0
    Other
    $0
    Deferred
    $0 + $9,674 related
    Nontaxable benefits
    $0 + $15,693 related
    Filer's total
    $0 + $216,071 related

  • ANNE LABRUZZO

    CHIEF FINANCIAL OFFICER

    Total calculated
    $205,272
    From this org
    $0
    From related orgs
    $182,124
    Other
    $23,148
    Hours/week
    2 + 38 related

    Schedule J breakdown matched by us

    Base
    $0 + $182,124 related
    Bonus
    $0
    Other
    $0
    Deferred
    $0 + $9,239 related
    Nontaxable benefits
    $0 + $13,909 related
    Filer's total
    $0 + $205,272 related

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
    $1,876,603
    Expenses
    $5,582,552
    Contributions
    $555,334
    Grants paid
    $5,511,530
  • 2024
    Revenue
    $1,559,624
    Expenses
    $463,426
    Contributions
    $692,614
    Grants paid
    $385,201
  • 2023
    Revenue
    $3,755,865
    Expenses
    $432,257
    Contributions
    $3,530,530
    Grants paid
    $372,198
  • 2022
    Revenue
    $587,737
    Expenses
    $379,919
    Contributions
    $505,724
    Grants paid
    $310,812

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
    $1,073,893
    Expenses
    $667,968
    Assets (EOY)
    $10,878,749

  • 2020 · 990

    Revenue
    $2,194,735
    Expenses
    $257,346
    Assets (EOY)
    $9,679,419

  • 2019 · 990

    Revenue
    $780,460
    Expenses
    $1,058,675
    Assets (EOY)
    $6,705,300

  • 2018 · 990

    Revenue
    $1,355,015
    Expenses
    $223,545
    Assets (EOY)
    $6,023,503

  • 2017 · 990

    Revenue
    $1,688,841
    Expenses
    $123,419
    Assets (EOY)
    $5,339,642

  • 2016 · 990

    Revenue
    $1,422,188
    Expenses
    $129,006
    Assets (EOY)
    $3,468,940

  • 2015 · 990

    Revenue
    $2,282,132
    Expenses
    $13,353
    Assets (EOY)
    $2,075,468

  • 2014 · 990

    Revenue
    $0
    Expenses
    $0
    Assets (EOY)
    $0

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

Where these grants went next →

Grants received

Related organizations

From Schedule R Part II, where a filer lists the tax-exempt organizations it is related to by control. It does not record shared board members or money.

Declared on its 2025 return

Declared as related by

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 SO.

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