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US nonprofit · EIN 260799587 · Los Altos, CAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 260799587) - 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.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 PF), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

The Heising-Simons Foundation

Donations deductible
Total assets
$810.5m
IRS master file
Directors and trustees
3
8.1y av
Chair observed
≥5 yrs
Elizabeth D Simons
Left since last filing
0
no seats appear to have opened
Officers and senior staff
5
named in Part VII
Activity
T20
Philanthropy, voluntary services and grantmaking
Filings on record
5
latest 2023
Renewal outlook
Low current likelihood
score 8 of 100
How am I connected?

The Heising-Simons Foundation's network

3 people1 organisationi3 people and 1 organisation on this map.The large node is the subject of this page. Solid lines are what the register itself records (3). Violet dotted lines (1) are likely: the same full name sits on the current board of another organisation in the same register and region. Form 990 filings give names without a person identifier; SEC insider filings carry a CIK. It may be a different person.

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 in the tables. The network map shows same-name matches as likely links only, never as confirmed.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
Elizabeth D Simons ChairChair of the Board2018
8 yrs
Caitlin HeisingVice Chair of the Board2018
8 yrs
Mark W HeisingVice Chair of the Board2019
7 yrs
Under 5 years5 to 6 years6 years or more

Officers and senior leadership

5 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.
NameTitle as filedOn the filings
Brian EuleDirector of Communications & Secretarysince 2018
Deanna GombyPresident and CEO (Thru 1/3/23)since 2018
Jeffrey P MalloyCOO and Treasurersince 2018
Judy BlumensteinDirector of Finance and Treasurer2023
Sushma RamanPresident and CEO2023

About

Legal name
The Heising-Simons Foundation
EIN
260799587
Address
400 Main St Ste 200, Los Altos, CA, 94022-2840
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
9 (IRS master file code)
IRS ruling date
1 December 2007
Status
Code 01 (unconditional exemption)
Form 990 filings on record
5, latest 2023
IRS Publication 78
PF (contributions deductible)

Most connected

Longest observed on the filings

≥8years on the filingsElizabeth D Simons
≥8years on the filingsCaitlin Heising
≥7years on the filingsMark W Heising

Filed finances

No Form 990 financial figures are held for this organisation yet (smaller organisations file a shorter return, and some filings are not yet read).