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US nonprofit · EIN 392018087 · Ridgeway, WIiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 392018087) - 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 - 990PF 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.2026 return IRS e-file (TEOS) 2026 release: 990PF for the year to 31 December 2025.Deductibility IRS Publication 78 data (code POF), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Malcolm Stack Foundation Inc

Donations deductible
Revenue
$1.4m
year to 31 December 2025
Expenses
$426k
year to 31 December 2025
Total assets
$8.9m
year to 31 December 2025
Net assets
$8.9m
assets less liabilities
Directors and trustees
3
8.4y av
Left since last filing
0
no seats appear to have opened
Activity
C30
Environment
Filings on record
5
latest 2023
How am I connected?

Malcolm Stack Foundation Inc's network

3 peoplei3 people on this map.The large node is the subject of this page. Solid lines are what the register itself records (3). Form 990 filings give names without a person identifier; SEC insider filings carry a CIK.

The board

3 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
Anne M Connor CO Bell LabsPresident2018
8 yrs
Debra Locke CO Bell LabsVice President2018
8 yrs
Linda S Hughes CO Bell LabsTreasurer/Secretary2018
8 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
Linda S HughesTreasurer/Secretary2$0
Anne M ConnorPresident2$0
Debra LockeVice President2$0

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

About

Legal name
Malcolm Stack Foundation Inc
EIN
392018087
Address
Po Box 186, Ridgeway, WI, 53582-0186
State
Wisconsin
Activity (NTEE)
C30 Environment
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Environment
Size band
7 (IRS master file code)
IRS ruling date
1 June 2001
Status
Code 01 (unconditional exemption)
Form 990 filings on record
5, latest 2023
IRS Publication 78
POF (contributions deductible)

Most connected

Longest observed on the filings

≥8years on the filingsAnne M Connor CO Bell Labs
≥8years on the filingsDebra Locke CO Bell Labs
≥8years on the filingsLinda S Hughes CO Bell Labs

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
$8.9m
Net assets or fund balances
$8.9m