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Governance Register
US nonprofit · EIN 261469601 · Los Altos, CAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 261469601) - 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 28 February 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 28 February 2025.Deductibility IRS Publication 78 data (code PF), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Harrington Family Foundation'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
Katherine M HarringtonDirector2018
8 yrs
Robin C QuillDirector2018
8 yrs
Susan C HarringtonVice President2018
8 yrs
Thomas E HarringtonPresident2018
8 yrs
Under 5 years5 to 6 years6 years or more

Officers and senior leadership

1 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.
NameTitle as filedOn the filings
Jonathan HarringtonCFOsince 2018

Pay and hours

year to 28 February 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
Thomas E HarringtonPresident0$0
Susan C HarringtonVice President0$0
Jonathan HarringtonCFO0$0
Katherine M HarringtonDirector0$0
Robin C QuillDirector0$0

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

About

Legal name
Harrington Family Foundation
EIN
261469601
Address
105 Fremont Ave Ste A, Los Altos, CA, 94022-3914
State
California
Activity (NTEE)
T20 Philanthropy, voluntary services and grantmaking
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Philanthropy, Voluntarism & Grantmaking Foundations
Size band
8 (IRS master file code)
IRS ruling date
1 March 2008
Status
Code 01 (unconditional exemption)
Form 990 filings on record
6, latest 2025
IRS Publication 78
PF (contributions deductible)

Most connected

Longest observed on the filings

≥8years on the filingsKatherine M Harrington
≥8years on the filingsRobin C Quill
≥8years on the filingsSusan C Harrington
≥8years on the filingsThomas E Harrington

Latest return

year to 28 February 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 28 February 2025. US dollars, as filed.
Total assets
$14.4m
Net assets or fund balances
$14.4m