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Governance Register
US nonprofit · EIN 200294550 · Sands Point, NYiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 200294550) - 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 time served.Latest return IRS Form 990 series e-file data - 990 for the year to 31 December 2025: assets, liabilities, staff, website, telephone, pay.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 Sands Point Preserve Conservancy's network

14 people5 organisationsi14 people and 5 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (14). 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

14 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 13 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Karli Hagedorn ChairChairman2022
4 yrs
Adam HanftBoard Member2018
8 yrs
Alyson K AdlerBoard Member2018
8 yrs
Anita SethiBoard Member2019
7 yrs
Brian HerringtonBoard Member2023
3 yrs
Chiara Trento MAIBoard Member2020
6 yrs
Dilia KamenskyBoard Member2022
4 yrs
Frank C UllmanBoard Member2019
7 yrs
Georgia DeyoungBoard Member2018
8 yrs
Jack MandelTreasurer2018
8 yrs
Jane SternBoard Member2018
8 yrs
Jean-Marie PosnerBoard Member2018
8 yrs
Jeremiah S Bosgang (also filed as Jeremiah Bosgang)Executive Di2024
2 yrs
Trey PauleyCompany secretary2022
4 yrs
Under 5 years5 to 6 years6 years or moreShow all 14 →

Officers and senior leadership

8 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.
NameTitle as filedOn the filings
Beth A HornExecutive Director2020
David FaureCompany secretarysince 2019
James HagedornCompany secretary2018
Jeremiah S BosgangFilm & Television Prod. MGR.since 2020
Karli HagedornChairmansince 2018
Lisa Kaye GrossmanTreasurer2020
Owen CostelloBoard Member2018
Robert McMahonTreasurersince 2018

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
Jeremiah BosgangExecutive Di40$185k
Alyson K AdlerBoard Member5$0
Georgia DeyoungBoard Member5$0
Ed GoldBoard Member5$0
Karli HagedornChairman10$0
Adam HanftBoard Member5$0
Brian HerringtonBoard Member5$0
Dilia KamenskyBoard Member5$0
Chiara Trento MaiBoard Member5$0
Jack MandelTreasurer5$0
Trey PauleySecretary5$0
Jean-Marie PosnerBoard Member5$0
Carol RossettieBoard Member5$0
Anita SethiBoard Member5$0
Jane SternBoard Member5$0
Frank C UllmanBoard Member5$0

About

Legal name
The Sands Point Preserve Conservancy
EIN
200294550
Address
127 Middle Neck Rd, Sands Point, NY, 11050-1218
State
New York
Mission
To preserve the former guggenheim estate's 216-acre waterfront park, woodlands, and historic mansions and to provide a range of cultural and educational programs for all ages. (as filed on the Form 990)
Activity (NTEE)
A50 Arts, culture and humanities
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Arts, Culture & Humanities
Size band
6 (IRS master file code)
Formed
2003
Principal officer
Karli Hagedorn (as named on the Form 990)
IRS ruling date
1 April 2004
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 filingsAdam Hanft
≥8years on the filingsAlyson K Adler
≥8years on the filingsGeorgia Deyoung
≥8years on the filingsJack Mandel

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
$5.2m
Total liabilities
$376k
Net assets or fund balances
$4.8m
Contributions and grants received
$1.3m
Program service revenue
$414k
Employees
34
Volunteers
20

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$2.4m$1.7m$678k

As filed on the IRS Form 990. US dollars.

State registration

1 entityiBusiness-entity registers published by US states. These records are matched to this organisation by name and state, not by EIN, and are labelled as likely matches. Street addresses are not shown.
The Sands Point Preserve Conservancy, Inc. likely matchiMatched by exact name and state (and ZIP where shown). State registers do not publish EINs, so this is not a confirmed match. Source: New York Department of State, active corporations (data.ny.gov n9v6-gdp6). Licence: New York open data terms of use. Data last fetched 18 October 2026.
State
New York
Entity type
Domestic Not-For-Profit Corporation
Status
Active
Formed
9 July 2003
Registered agent
Not stated