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US nonprofit · EIN 136139887 · New York, NYiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 136139887) - 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 March 2025: 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 (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 2015.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

Horological Society of New York Inc

Donations deductible
Revenue
$1.5m
year to 31 March 2025
Expenses
$1.6m
year to 31 March 2025
Total assets
$2.2m
$357k liabilities
Net assets
$1.8m
assets less liabilities
Directors and trustees
16
4.3y av
Staff
5
16 volunteers
Left since last filing
4
25% of the board
Officers and senior staff
4
named in Part VII
Exemption reinstated on 15 March 2015. The IRS had automatically revoked it on 15 May 2010 (after three years without a return). Source: IRS Automatic Revocation of Exemption List, posted to 13 October 2026.
How am I connected?

Horological Society of New York Inc's network

16 people13 organisationsi16 people and 13 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (16). Violet dotted lines (13) 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

16 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 16 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Aldis HodgeTrustee2021
5 yrs
Amit PuriTrustee2025
1 yr
Brett WalsdorfTreasurer2019
7 yrs
Brian RobinsonTrustee2025
1 yr
Briana LeTrustee2021
5 yrs
David ChangTrustee2025
1 yr
Ellen SorensenTrustee2025
1 yr
Eneuri AcostaVice President2020
6 yrs
Eric KUTrustee2021
5 yrs
H Jane ChonCompany secretary2022
4 yrs
Lenise LoganTrustee2022
4 yrs
Mark ArmenanteTrustee2021
5 yrs
Paul BoutrosTrustee2022
4 yrs
Roger SmithTrustee2022
4 yrs
Romain GauthierTrustee2022
4 yrs
William BuchalterPresident2021
5 yrs
Under 5 years5 to 6 years6 years or moreShow all 16 →

Officers and senior leadership

4 listediNamed in Part VII as officers, key employees or highest-compensated staff - not board members, shown for completeness.
NameTitle as filedOn the filings
Carolina NavarroDeputy Directorsince 2024
Edwin HydemanExecutive Director (Former)2021
Miranda C MarracciniHead Librarian2025
Nicholas ManousosExecutive Directorsince 2021

Pay and hours

year to 31 March 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
Nicholas ManousosExecutive Direc35$175k$22k
Carolina NavarroDeputy Director35$130k$16k
Miranda C MarracciniHead Librarian35$100k$13k
Briana LeTrustee0.5$26k
H Jane ChonSecretary1$0
David ChangTrustee1$0
Brett WalsdorfTreasurer1$0
Aldis HodgeTrustee0.5$0
Amit PuriTrustee0.5$0
Eneuri AcostaVice President0.5$0
Eric KuTrustee0.5$0
Lenise LoganTrustee0.5$0
Mark ArmenanteTrustee0.5$0
Paul BoutrosTrustee0.5$0
Roger SmithTrustee0.5$0
Romain GauthierTrustee0.5$0
Brian RobinsonTrustee0.5$0
William BuchalterPresident0.5$0
Ellen SorensenTrustee0.5$0

About

Legal name
Horological Society of New York Inc
EIN
136139887
Address
20 W 44th St Ste 506, New York, NY, 10036-6603
State
New York
Mission
The Organizations mission is to advance the art and science of horology. The Organization seeks to accomplish this by offering horology classes to the public. The classes are taught by professional watchmakers and are intended to make horology accessible and enjoyable. (as filed on the Form 990)
Activity (NTEE)
U20 Science and technology research
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Science & Technology
Size band
6 (IRS master file code)
Formed
1934
Principal officer
Nicholas Manousos (as named on the Form 990)
IRS ruling date
1 March 2015
Status
Code 01 (unconditional exemption)
Form 990 filings on record
7, latest 2025
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥7years on the filingsBrett Walsdorf
≥6years on the filingsEneuri Acosta
≥5years on the filingsAldis Hodge
≥5years on the filingsBriana Le

Latest return

year to 31 March 2025iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 March 2025. US dollars, as filed.
Total assets
$2.2m
Total liabilities
$357k
Net assets or fund balances
$1.8m
Contributions and grants received
$946k
Program service revenue
$535k
Grants and similar paid out
$256k
Employees
5
Volunteers
16

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2023$1.1m$1.4mDeficit $206k

As filed on the IRS Form 990. US dollars.

Grants paid

4 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
Gem City Collegeschool supplies$13k
Parris Junior CollegeSchool Supplies$13k
Seattle Colleges Foundationschool supplies$13k
Veterans Watchmaker Initiativschool suplies$13k

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.
Horological Society Of New York, 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
15 October 1934
Registered agent
Not stated