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US nonprofit · EIN 274398285 · Greenwich, CTiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 274398285) - 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 - 990EZ 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.Exemption status IRS Automatic Revocation of Exemption List (posted to 13 October 2026).Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Glenville Mavericks Inc

Donations deductible
Revenue
$46k
year to 31 December 2025
Expenses
$36k
year to 31 December 2025
Total assets
$59k
$0 liabilities
Net assets
$59k
assets less liabilities
Directors and trustees
8
4.3 years on average
Left since last filing
0
no seats appear to have opened
Officers and senior staff
2
named in Part VII
Activity
N65
Recreation and sports
Exemption reinstated on 15 May 2013. The IRS had automatically revoked it on 15 May 2013 (after three years without a return). Source: IRS Automatic Revocation of Exemption List, posted to 13 October 2026.
How am I connected?

Glenville Mavericks Inc's network

8 people2 organisationsi8 people and 2 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (8). Violet dotted lines (4) 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

8 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.
NameRole as filedSinceOn the board
Greg SlaterTrustee2025
1 yr
Jamel KeelsTrustee2023
3 yrs
Jim CowieCompany secretary2024
2 yrs
Nick CarrielloTrustee2018
8 yrs
Rob HarveyPresident2022
4 yrs
Rosemarie LefflbineTreasurer2018
8 yrs
Tara HarveyVice-Treasurer2023
3 yrs
Will OstruzkaVice President2024
2 yrs
Under 5 years5 to 6 years6 years or more

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
Russell WarrenChairman/Executive Director2019
Steve RibushofskiChairman/Executive Director2018

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
Rosemarie LefflbineTreasurer5$2k
Nick CarrielloTrustee5$0
Greg SlaterTrustee0$0
Jim CowieSecretary0$0
Will OstruzkaVice President0$0
Rob HarveyPresident5$0
Tara HarveyVice-Treasurer5$0
Jamel KeelsTrustee0$0

About

Legal name
Glenville Mavericks Inc
EIN
274398285
Address
5 Fairview Ter, Greenwich, CT, 06831-4103
State
Connecticut
Activity (NTEE)
N65 Recreation and sports
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Recreation & Sports
Size band
3 (IRS master file code)
IRS ruling date
1 December 2014
Status
Code 01 (unconditional exemption)
Form 990 filings on record
8, latest 2025
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥8years on the filingsNick Carriello
≥8years on the filingsRosemarie Lefflbine
≥4years on the filingsRob Harvey
≥3years on the filingsJamel Keels

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
$59k
Total liabilities
$0
Net assets or fund balances
$59k

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$48k$40k$8k

As filed on the IRS Form 990. US dollars.