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THORNE ECOLOGICAL INSTITUTE

EIN 84-6029250 LAFAYETTE, CO

Revenue 2024
$2,681,033
Expenses 2024
$3,460,225

Program services were 74.6% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
C60Z
Classification
2800
Street
300 OLD LARAMIE TRL

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

THORNE'S MISSION IS TO BUILD EARTH STEWARDSHIP BY CONNECTING YOUTH TO NATURE THROUGH JOYFUL, HANDS-ON, PLACE-BASED ENVIRONMENTAL EDUCATION EXPERIENCES.

  • CORE PROGRAMS: THORNE ACCOMPLISHES ITS MISSION THROUGH NATURE-BASED EDUCATION PROGRAMS THAT PRIMARILY SERVE BOULDER COUNTY YOUTH AND FAMILIES. PROGRAMS ARE DESIGNED TO BUILD EARTH STEWARDSHIP BY CONNECTING CHILDREN AND YOUTH TO NATURE THROUGH JOYFUL, HANDS-ON, PLACE-BASED ENVIRONMENTAL EDUCATION EXPERIENCES. SCHOOL AND COMMUNITY PROGRAMS: THORNE PROVIDES FIELD TRIPS, FIELD DAYS, IN-SCHOOL LESSONS, AND AFTER-SCHOOL PROGRAMS THAT SUPPORT ACADEMIC LEARNING AND BUILD NATURE CONNECTION THROUGH DIRECT EXPERIENCE WITH LOCAL ECOSYSTEMS. FY25 SCFD ATTENDANCE SUPPORT DOCUMENTED QUALIFYING TOUR GROUP/PROGRAM ATTENDANCE FOR FIELD TRIP, FIELD DAY, IN-SCHOOL, AND AFTER- SCHOOL ACTIVITIES. ------ SEE SCHEDULE O FOR MORE DETAILS ------

    Expenses $2,580,829 · Grants $149,771 · Revenue $1,377,584

As filed on the 2024 return. The filer continues this part on Schedule O, which is not shown here.

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.

  • Brian Sense

    EXECUTIVE DI

    Total calculated
    $0
    Hours/week
    40
  • Keith Desrosiers

    EXECUTIVE DI

    Total calculated
    $193,282
    From this org
    $175,294
    From related orgs
    $0
    Other
    $17,988
    Hours/week
    40

    Schedule J breakdown matched by us

    Base
    $175,294
    Bonus
    not reported
    Other
    not reported
    Deferred
    $10,061
    Nontaxable benefits
    $7,927
    Filer's total
    $193,282
  • Leann Arend

    DEPUTY DIREC

    Total calculated
    $115,373
    From this org
    $115,373
    From related orgs
    $0
    Other
    $0
    Hours/week
    40
  • John Ricotta

    CHAIR

    Total calculated
    $0
    Hours/week
    2
  • Sarah Hauck

    VICE CHAIR

    Total calculated
    $0
    Hours/week
    2
  • Aidan Smith

    SECRETARY

    Total calculated
    $0
    Hours/week
    2
  • Sarah Irizarry

    TREASURER

    Total calculated
    $0
    Hours/week
    2
  • John Ahrens

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Luis Alvarez

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • David Kirk

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Sari Long

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Juana Mendoza

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Annika Paradise

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Leidy Pineda Flores

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Tammy Sandoval

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Jay Schultz

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Micah Shagoury

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1
  • Mary Kathryn Wood

    BOARD MEMBER

    Total calculated
    $0
    Hours/week
    1

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
    $2,681,033
    Expenses
    $3,460,225
    Contributions
    $1,280,142
    Grants paid
    $149,771
  • 2023
    Revenue
    $3,270,743
    Expenses
    $3,574,915
    Contributions
    $1,892,066
    Grants paid
    $126,948
  • 2022
    Revenue
    $4,946,732
    Expenses
    $2,724,855
    Contributions
    $3,640,155
    Grants paid
    $161,647

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
    $3,202,535
    Expenses
    $2,234,422
    Assets (EOY)
    $4,978,223
  • 2020 · 990

    Revenue
    $1,022,609
    Expenses
    $1,032,182
    Assets (EOY)
    $3,207,075
  • 2020 · 990

    Revenue
    $2,802,339
    Expenses
    $2,035,638
    Assets (EOY)
    $4,067,500
  • 2019 · 990

    Revenue
    $2,394,982
    Expenses
    $1,969,561
    Assets (EOY)
    $2,849,455
  • 2018 · 990

    Revenue
    $1,771,675
    Expenses
    $1,650,630
    Assets (EOY)
    $2,258,252
  • 2017 · 990

    Revenue
    $1,814,540
    Expenses
    $1,423,688
    Assets (EOY)
    $2,086,400
  • 2016 · 990

    Revenue
    $1,638,247
    Expenses
    $1,051,442
    Assets (EOY)
    $1,567,589
  • 2015 · 990

    Revenue
    $908,052
    Expenses
    $787,671
    Assets (EOY)
    $980,771
  • 2014 · 990

    Revenue
    $956,296
    Expenses
    $708,139
    Assets (EOY)
    $865,738
  • 2013 · 990

    Revenue
    $756,703
    Expenses
    $647,006
    Assets (EOY)
    $620,266

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

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.

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