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Governance Register
US nonprofit · EIN 680509773 · Los Olivos, CAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 680509773) - 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.Principal officer IRS Form 990-N (e-Postcard) - principal officer named for tax year 2021.Licence US Federal Government public domain.How we handle data

Preservation of LOS Olivos' network

3 people3 organisationsi3 people and 3 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (3). Violet dotted lines (5) 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
Jeanne HollingsworthCompany secretary2018
8 yrs
Mark HerthelTreasurer2018
8 yrs
Rolf RichterVice President2018
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
Mark HerthelPresident1$0
Mark HerthelTreasurer1$0
Jeanne HollingsworthSecretary1$0
Rolf RichterVice President3$0

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

About

Legal name
Preservation of Los Olivos
EIN
680509773
Address
Po Box 722, Los Olivos, CA, 93441-0722
State
California
Activity (NTEE)
C34 Environment
IRS classification
501(c)04 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Environment
Size band
2 (IRS master file code)
IRS ruling date
1 August 2002
Status
Code 01 (unconditional exemption)
Form 990 filings on record
3, latest 2023
Principal officer
Mark Herthel (Form 990-N, tax year 2021)

Most connected

Longest observed on the filings

≥8years on the filingsJeanne Hollingsworth
≥8years on the filingsMark Herthel
≥8years on the filingsRolf Richter

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
$21k
Net assets or fund balances
$21k