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Governance Register
US nonprofit · EIN 582276314 · Atlanta, GAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 582276314) - 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 - 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 (us-approach-v4-clean). 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

Chastain Horse Park Ltd's network

17 people6 organisationsi17 people and 6 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (17). 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

17 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. The organisation reported 17 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Holly Sims ChairFinance Committee Chair2018
8 yrs
Jennifer Flanagan ChairBoard Chair2018
8 yrs
Laura Harris ChairSecretary/Gov Committee Chair2018
8 yrs
Lisa Wargo ChairProgramming Committee Chair2018
8 yrs
Nancy Rizor ChairScholarship Committee Chair2023
3 yrs
Sara Schlesinger ChairDevelopment Committee Chair2022
4 yrs
Andrew BlaisdellDirector2022
4 yrs
Carrie ShapiroDirector2024
2 yrs
Cindy WallDirector2024
2 yrs
Cozetta GraggDirector2024
2 yrs
Lizette DunayDirector2022
4 yrs
Lizz PatrickDirector2022
4 yrs
Michael YochelsonDirector2024
2 yrs
Robin HalpernDirector2024
2 yrs
Steven Fallon (also filed as Steve Fallon)Director2018
8 yrs
Trisha GrossExecutive Director2020
6 yrs
Will StengelDirector2022
4 yrs
Under 5 years5 to 6 years6 years or moreShow all 17 →

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
Trisha GrossExecutive Disince 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
Trisha GrossExecutive Director40$174k$7k
Jennifer FlanaganBoard Chair1$0
Laura HarrisSecretary/Gov Committee Chair1$0
Holly SimsFinance Committee Chair1$0
Lisa WargoProgramming Committee Chair1$0
Sara ShlesingerDevelopment Committee Chair1$0
Nancy RizorScholarship Committee Chair1$0
Andrew BlaisdellDirector1$0
Lizette DunayDirector1$0
Steve FallonDirector1$0
Cozetta GraggDirector1$0
Robin HalpernDirector1$0
Lizz PatrickDirector1$0
Carrie ShapiroDirector1$0
Cynthia WallDirector1$0
Michael YochelsonDirector1$0
Susan StarnesDirector1$0

About

Legal name
Chastain Horse Park Ltd
EIN
582276314
Address
4371 Powers Ferry Rd, Atlanta, GA, 30327-3420
State
Georgia
Mission
Chastain horse park empowers individuals of all abilities through life-changing relationships with horses. Chastain horse park offers therapeutic programming to children, teens, and adults with physical, cognitive, and emotional disabilities. (as filed on the Form 990)
Activity (NTEE)
N69 Recreation and sports
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Recreation & Sports
Size band
8 (IRS master file code)
Formed
1998
Principal officer
Trisha Gross (as named on the Form 990)
IRS ruling date
1 January 1998
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 filingsHolly Sims
≥8years on the filingsJennifer Flanagan
≥8years on the filingsLaura Harris
≥8years on the filingsLisa Wargo

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
$14.3m
Total liabilities
$130k
Net assets or fund balances
$14.2m
Contributions and grants received
$1.6m
Program service revenue
$1.7m
Grants and similar paid out
$77k
Employees
36
Volunteers
403

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$4m$3.4m$624k

As filed on the IRS Form 990. US dollars.