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US nonprofit · EIN 862621132 · Minneapolis, MNiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 862621132) - NTEE activity code, address.Board and officers IRS Form 990 annual filings, Part VII (directors, trustees, officers, key employees), read year by year to observe tenure.Latest return IRS Form 990 series e-file data - 990EZ for the year to 31 December 2025: assets, liabilities, staff, website, telephone, pay.Renewal outlook Computed by Governance Register from the observed filing history and filed revenue (us-approach-v4-clean). Not a statement that the organisation is recruiting.Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Combinatorics Consortium Inc

Donations deductible
Revenue
$30k
year to 31 December 2025
Expenses
$41k
year to 31 December 2025
Total assets
$152k
$0 liabilities
Net assets
$152k
assets less liabilities
Directors and trustees
4
5.4y av
Left since last filing
0
no seats appear to have opened
Activity
U19
Science and technology research
Filings on record
3
latest 2023
How am I connected?

Combinatorics Consortium Inc's network

4 peoplei4 people on this map.The large node is the subject of this page. Solid lines are what the register itself records (4). Form 990 filings give names without a person identifier; SEC insider filings carry a CIK.

The board

4 listediTime on the board is observed from the annual filings: the IRS files no appointment date, so the bar counts years from the first filing the person appears on - a lower bound, not a filed start date. Names are exactly as filed. The IRS publishes no person identifier, so this edition does not yet link a person across organisations.Tenure and departures are observed across annual filings. Observed tenure is a lower bound - a member may have joined before the first year on record.
NameRole as filedSinceOn the board
Michael ZabrockiCompany secretary2021
5 yrs
Sara BilleyPresident2021
5 yrs
Victor ReinerTreasurer2021
5 yrs
Volkmar WelkerVice President2021
5 yrs
Under 5 years5 to 6 years6 years or more

Pay and hours

year to 31 December 2025iFrom Part VII of the Form 990: compensation reported for each officer, director, trustee, key employee and highest-paid staff member, and the average hours a week they report. Most board members are unpaid; a blank means nothing was reported. Pay from related organisations is shown separately.
NameTitle as filedHours a weekPay from the organisationRelated organisationsOther
Victor ReinerTreasurer5$0
Sara BilleyPresident5$0
Volkmar WelkerVice President5$0
Michael ZabrockiSecretary5$0

No pay was reported for anyone in Part VII on this return.

About

Legal name
Combinatorics Consortium Inc
EIN
862621132
Address
5007 Dupont Ave S, Minneapolis, MN, 55419-1149
State
Minnesota
Activity (NTEE)
U19 Science and technology research
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Science & Technology
Size band
4 (IRS master file code)
IRS ruling date
1 August 2021
Status
Code 01 (unconditional exemption)
Form 990 filings on record
3, latest 2023
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥5years on the filingsMichael Zabrocki
≥5years on the filingsSara Billey
≥5years on the filingsVictor Reiner
≥5years on the filingsVolkmar Welker

Latest return

year to 31 December 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 December 2025. US dollars, as filed.
Total assets
$152k
Total liabilities
$0
Net assets or fund balances
$152k