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Governance Register
US nonprofit · EIN 521413042 · Warrenton, VAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 521413042)Board and officers IRS Form 990 annual filings, Part VII (directors, trustees, officers, key employees), read year by year to observe time served.Latest return IRS Form 990 series e-file data - 990 for the year to 31 December 2024: assets, liabilities, staff, website, telephone, pay, grants paid (Schedule I).Finances by year IRS Form 990 e-file data - total revenue and total expenses by tax year.Renewal outlook Computed by Governance Register from the observed filing history and filed revenue. 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

The Clifton Institute Inc's network

12 people6 organisationsi12 people and 6 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (12). Violet dotted lines (6) 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

12 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.Time served and departures are observed across annual filings. Observed time served is a lower bound - a member may have joined before the first year on record. The organisation reported 12 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Anne Douglas AthertonDirector2022
4 yrs
Barbara HellerCompany secretary2022
4 yrs
Charles G Mackall JRDirector2018
8 yrs
Douglas LarsonPresident2018
8 yrs
G Robert LeeVice Preside2020
6 yrs
Hans WachtmeisterDirector2023
3 yrs
Jocelyn L Alexander MEDDirector2024
2 yrs
Marcia MarshDirector2023
3 yrs
Margrete StevensDirector2023
3 yrs
Mark DebordTreasurer2023
3 yrs
Nancy RainesDirector2024
2 yrs
Victoria StackDirector2020
6 yrs
Under 5 years5 to 6 years6 years or moreShow all 12 →

Officers and senior leadership

2 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.
NameTitle as filedOn the filings
Eleanor R Harris PH DManaging Dirsince 2018
J Berton Harris PHDExecutive Disince 2018

Pay and hours

year to 31 December 2024iFrom 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
Eleanor R Harris Ph DCo- Director40$54k$3k
J Berton Harris PhDCo- Director40$54k$3k
Douglas LarsonPresident1$0
G Robert LeeVice Preside0.5$0
Barbara HellerSecretary0.5$0
Mark DebordTreasurer0.5$0
Jocelyn L Alexander MedDirector0.5$0
Anne Douglas AthertonDirector0.5$0
Charles G Mackall JrDirector0.5$0
Marcia MarshDirector0.5$0
Nancy RainesDirector0.5$0
Victoria StackDirector0.5$0
Margrete StevensDirector0.5$0
Hans WachtmeisterDirector0.5$0

About

Legal name
The Clifton Institute Inc
EIN
521413042
Address
6712 Blantyre Rd, Warrenton, VA, 20187-7144
State
Virginia
Mission
Our mission is to inspire a deeper understanding and appreciation of nature, to study the ecology of our region, to restore habitat, and to conserve native biodiversity. We fulfill our mission by providing environmental education to people of all ages, carrying out ecological research, and restoring habitat for native plants and animals. Our 900-acre field station in central fauquier county... (as filed on the Form 990)
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Size band
7 (IRS master file code)
Formed
1985
Principal officer
Douglas Larson (as named on the Form 990)
IRS ruling date
1 November 1985
Status
Code 01 (unconditional exemption)
Form 990 filings on record
6, latest 2024
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥8years on the filingsCharles G Mackall JR
≥8years on the filingsDouglas Larson
≥6years on the filingsG Robert Lee
≥6years on the filingsVictoria Stack

Latest return

year to 31 December 2024iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 December 2024. US dollars, as filed.
Total assets
$7.7m
Total liabilities
$91k
Net assets or fund balances
$7.6m
Contributions and grants received
$904k
Program service revenue
$41k
Grants and similar paid out
$73k
Employees
21
Volunteers
252

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$1m$979k$49k

As filed on the IRS Form 990. US dollars.

Grants paid

2 listediFrom Schedule I of the Form 990: grants and assistance to organisations in the United States, largest first (up to 25). Schedule I is filed only by organisations that gave more than $5,000 to any one recipient.
RecipientPurposeAmount
Smithsonian InstitutionVa box turtle conser$56k
Virginia State UniversityNative seed project$17k