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SOCIETY FOR THE PROTECTION OF UNDERGROUND NETWORKS

EIN 87-4391116 DOVER, DE

Largest nonprofits in Delaware

Revenue 2024
$9,205,437
Expenses 2024
$3,700,264

Program services were 79.0% of total expenses calculated — Part IX's program-services column over total expenses, both as filed.

As filed

Subsection
03
NTEE code
U50
Classification
1000
Street
3500 SOUTH DUPONT HIGHWAY STE EI 10

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

SPUNs mission is to map and advocate for the protection of the mycorrhizal networks that regulate the Earths climate and ecosystems. (Continued Schedule O)

  • SPUNs mission is to map and advocate for the protection of the mycorrhizal networks that regulate the Earths climate and ecosystems. We accomplish this by mapping the mycorrhizal fungal networks of planet earth, advocating for the protection of underground ecosystems, and driving innovation in underground climate and biodiversity science.

    Expenses $2,924,661 · Grants $429,894

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.

  • Erica Tobyn Kiers

    EXECUTIVE DIR & BOARD DIR

    Total calculated
    $271,580
    From this org
    $271,580
    From related orgs
    $0
    Other
    $0
    Hours/week
    30

    Schedule J breakdown matched by us

    Base
    $271,580
    Bonus
    not reported
    Other
    not reported
    Deferred
    not reported
    Nontaxable benefits
    not reported
    Filer's total
    $271,580

  • Jason Cremerius

    CHIEF STRATEGY & OPERATIONS OFFICER

    Total calculated
    $255,470
    From this org
    $255,470
    From related orgs
    $0
    Other
    $0
    Hours/week
    32

    Schedule J breakdown matched by us

    Base
    $255,470
    Bonus
    not reported
    Other
    not reported
    Deferred
    not reported
    Nontaxable benefits
    not reported
    Filer's total
    $255,470

  • Adriana Corrales

    LEAD RESEARCH SCIENTIST

    Total calculated
    $136,295
    From this org
    $136,295
    From related orgs
    $0
    Other
    $0
    Hours/week
    40

  • Bethan Manley

    LEAD COMPUTATIONAL BIOLOGIST

    Total calculated
    $126,282
    From this org
    $126,282
    From related orgs
    $0
    Other
    $0
    Hours/week
    40

  • Michael Van Nuland

    LEAD DATA SCIENTIST

    Total calculated
    $120,000
    From this org
    $120,000
    From related orgs
    $0
    Other
    $0
    Hours/week
    40

  • Kelcie Walther

    PR AND MEDIA RELATIONS LEAD

    Total calculated
    $115,665
    From this org
    $115,665
    From related orgs
    $0
    Other
    $0
    Hours/week
    40

  • Jordan Young

    DESIGN LEAD

    Total calculated
    $107,059
    From this org
    $107,059
    From related orgs
    $0
    Other
    $0
    Hours/week
    40

  • Mark Tercek

    BOARD CHAIR

    Total calculated
    $0
    Hours/week
    2

  • Jeremy Grantham

    BOARD DIRECTOR

    Total calculated
    $0
    Hours/week
    2

  • Rose Marcario

    BOARD DIRECTOR

    Total calculated
    $0
    Hours/week
    2

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
    $9,205,437
    Expenses
    $3,700,264
    Contributions
    $9,045,745
    Grants paid
    $429,894
  • 2023
    Revenue
    $325,324
    Expenses
    $93,291
    Contributions
    $325,200
    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.

Form 990-N e-Postcard, tax year 2022

Tax period
1 January 2022 to 31 December 2022
Principal officer
Steve Mendelsohn
Mailing address
3500 S Dupont Hwy Suite EI 101Dover DE 19901
Website
www.spun.earth

As filed, from the IRS e-Postcard file of 2 November 2026. The IRS publishes only each organization's most recent postcard, so earlier years are not shown. A 990-N carries no financial detail. The postcard also gives the principal officer's address, which is not shown here.

Grants made

No itemized grants to organizations. Schedule I is filed only by organizations that granted more than $5,000 to a recipient, so most filers have none.

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 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 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.