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US nonprofit · EIN 956133952 · Calabasas, CAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 956133952) - 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 - 990PF 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.2026 return IRS e-file (TEOS) 2026 release: 990PF for the year to 31 December 2025.Deductibility IRS Publication 78 data (code PF), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Leonis Adobe Association

Donations deductible
Revenue
$1.2m
year to 31 December 2025
Expenses
$1m
year to 31 December 2025
Total assets
$8.4m
year to 31 December 2025
Net assets
$8.2m
assets less liabilities
Directors and trustees
8
5.7y av
Left since last filing
0
no seats appear to have opened
Officers and senior staff
1
named in Part VII
Activity
A540
Arts, culture and humanities
How am I connected?

Leonis Adobe Association's network

8 people1 organisationi8 people and 1 organisation on this map.The large node is the subject of this page. Solid lines are what the register itself records (8). Violet dotted lines (1) 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.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.
NameRole as filedSinceOn the board
Brian KahnPresident2018
8 yrs
Dennis OleeskyVice President2023
3 yrs
Dennis WashburnTreasurer2018
8 yrs
Howard HorwitzBoard Member2024
2 yrs
Jeannette SmithCompany secretary2018
8 yrs
Jeffrey OliphantBoard Member2024
2 yrs
Robert YaldaBoard Member2023
3 yrs
Ruth AbelBoard Member2018
8 yrs
Under 5 years5 to 6 years6 years or more

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
Diane RamadanExec Directorsince 2023

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
Diane RamadanExec Director40$87k
Howard HorwitzBoard Member2$0
Brian KahnPresident2$0
Robert YaldaBoard Member2$0
Jeannette SmithSecretary2$0
Jeffrey OliphantBoard Member2$0
Dennis WashburnTreasurer2$0
Dennis OleeskyVice President2$0

About

Legal name
Leonis Adobe Association
EIN
956133952
Address
23537 Calabasas Rd, Calabasas, CA, 91302-1311
State
California
Activity (NTEE)
A540 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
7 (IRS master file code)
IRS ruling date
1 October 1963
Status
Code 01 (unconditional exemption)
Form 990 filings on record
7, latest 2024
IRS Publication 78
PF (contributions deductible)

Most connected

Longest observed on the filings

≥8years on the filingsBrian Kahn
≥8years on the filingsDennis Washburn
≥8years on the filingsJeannette Smith
≥8years on the filingsRuth Abel

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
$8.4m
Net assets or fund balances
$8.2m

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$0$987kDeficit $987k

As filed on the IRS Form 990. US dollars.