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LOWELL OBSERVATORY

EIN 86-0098918 FLAGSTAFF, AZ

Revenue 2025
$19,557,310
Expenses 2025
$22,235,112

Program services were 82.3% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
U31Z
Classification
8000
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).

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.

  • AMANDA BOSH

    EXECUTIVE DIRECTOR/COO

    Total calculated
    $241,104
    From this org
    $206,898
    From related orgs
    $0
    Other
    $34,206
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $206,898
    Bonus
    $0
    Other
    $0
    Deferred
    $10,755
    Nontaxable benefits
    $23,451
    Filer's total
    $241,104

  • LESLIE CURRIE

    CHIEF PHILANTHROPY OFFICER

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

    Schedule J breakdown matched by us

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

  • STEPHEN LEVINE

    DIRECTOR OF EDUCATION

    Total calculated
    $206,563
    From this org
    $184,546
    From related orgs
    $0
    Other
    $22,017
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $184,546
    Bonus
    $0
    Other
    $0
    Deferred
    $9,315
    Nontaxable benefits
    $12,702
    Filer's total
    $206,563

  • ANNE LABRUZZO

    CHIEF FINANCIAL OFFICER

    Total calculated
    $205,272
    From this org
    $182,124
    From related orgs
    $0
    Other
    $23,148
    Hours/week
    36 + 4 related

    Schedule J breakdown matched by us

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

  • DEIDRE HUNTER

    ASTRONOMER

    Total calculated
    $200,925
    From this org
    $176,393
    From related orgs
    $0
    Other
    $24,532
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $176,393
    Bonus
    $0
    Other
    $0
    Deferred
    $8,845
    Nontaxable benefits
    $15,687
    Filer's total
    $200,925

  • KYLER KUEHN

    DIRECTOR OF TECHNOLOGY + DIRECTOR OF SCIENCE

    Total calculated
    $199,131
    From this org
    $162,332
    From related orgs
    $0
    Other
    $36,799
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $162,332
    Bonus
    $0
    Other
    $0
    Deferred
    $8,701
    Nontaxable benefits
    $28,098
    Filer's total
    $199,131

  • PHILIP MASSEY

    ASTRONOMER

    Total calculated
    $199,084
    From this org
    $181,664
    From related orgs
    $0
    Other
    $17,420
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $181,664
    Bonus
    $0
    Other
    $0
    Deferred
    $8,941
    Nontaxable benefits
    $8,479
    Filer's total
    $199,084

  • MICHAEL WEST

    ASTRONOMER

    Total calculated
    $189,321
    From this org
    $177,551
    From related orgs
    $0
    Other
    $11,770
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $177,551
    Bonus
    $0
    Other
    $0
    Deferred
    $8,845
    Nontaxable benefits
    $2,925
    Filer's total
    $189,321

  • WILLIAM GRUNDY

    ASTRONOMER

    Total calculated
    $186,172
    From this org
    $152,491
    From related orgs
    $0
    Other
    $33,681
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $152,491
    Bonus
    $0
    Other
    $0
    Deferred
    $8,190
    Nontaxable benefits
    $25,491
    Filer's total
    $186,172

  • LISA A PRATO

    ASTRONOMER

    Total calculated
    $178,824
    From this org
    $157,275
    From related orgs
    $0
    Other
    $21,549
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $157,275
    Bonus
    $0
    Other
    $0
    Deferred
    $8,019
    Nontaxable benefits
    $13,530
    Filer's total
    $178,824

  • CODY HALF-MOON

    CHIEF MARKETING OFFICER

    Total calculated
    $176,742
    From this org
    $160,105
    From related orgs
    $0
    Other
    $16,637
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $160,105
    Bonus
    $0
    Other
    $0
    Deferred
    $8,000
    Nontaxable benefits
    $8,637
    Filer's total
    $176,742

  • LOWELL PUTNAM

    TRUSTEE

    Total calculated
    $21,069
    From this org
    $12
    From related orgs
    $0
    Other
    $21,057
    Hours/week
    30 + 4 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 — 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
    $19,557,310
    Expenses
    $22,235,112
    Contributions
    $12,790,757
    Grants paid
    $218,400
  • 2024
    Revenue
    $11,946,368
    Expenses
    $19,482,906
    Contributions
    $7,331,293
    Grants paid
    $175,151
  • 2023
    Revenue
    $20,163,990
    Expenses
    $18,645,161
    Contributions
    $18,265,662
    Grants paid
    $434,519
  • 2022
    Revenue
    $20,035,165
    Expenses
    $19,188,129
    Contributions
    $12,847,808
    Grants paid
    $539,475

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

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

Where these grants went next →

Grants received

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

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 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.