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Governance Register
US nonprofit · EIN 453605193 · Sausalito, CAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 453605193) - 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 2024: 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

Marin Open Studios' network

12 people1 organisationi12 people and 1 organisation on this map.The large node is the subject of this page. Solid lines are what the register itself records (12). 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

12 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 7 voting members of its governing body on its latest Form 990 Part VI; we list 12 in Part VII (Part VII does not always name every voting member).
NameRole as filedSinceOn the board
Joe GrennDirector2019
7 yrs
John HellmannCFO/Treasurer2019
7 yrs
Jonah BurlingamePresident & COB2022
4 yrs
Kassandra LevettPresident2024
2 yrs
Kay CarlsonExecutive Dir.2018
8 yrs
Michelle TharpDirector2024
2 yrs
Phil LeddellDirector2019
7 yrs
Sabine AlamDirector2024
2 yrs
Shiva PakdelDirector2018
8 yrs
Sioban ScanlonDirector2022
4 yrs
Stuart BassDirector2023
3 yrs
Tomi HoltDirector2022
4 yrs
Under 5 years5 to 6 years6 years or moreShow all 12 →

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
John HellmannCFO/Treasurersince 2018

Pay and hours

year to 31 December 2024iFrom 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
Kay CarlsonExecutive Dir.40$53k
John HellmannCFO/Treasurer2$0
Stuart BassDirector2$0
Joe GrennDirector1$0
Phil LeddellDirector1$0
Tomi HoltDirector10$0
Michelle TharpDirector3$0
Shiva PakdelDirector1$0
Sioban ScanlonDirector4$0
Jonah BurlingamePresident & COB3$0
Kassandra LevettPresident2$0
Sabine AlamDirector1$0

About

Legal name
Marin Open Studios
EIN
453605193
Address
Po Box 2786, Sausalito, CA, 94966-2786
State
California
Mission
Marin open studios is a non-profit visual arts organization dedicated to engaging and supporting marin county artists and their audiences through events, programs and services. Marin open studios champions a diverse and inclusive community art experience providing established and emerging artists with direct connections to bay area audiences and art patrons. (as filed on the Form 990)
Activity (NTEE)
A99 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
4 (IRS master file code)
Formed
2011
Principal officer
John Hellmann (as named on the Form 990)
IRS ruling date
1 August 2014
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 filingsKay Carlson
≥8years on the filingsShiva Pakdel
≥7years on the filingsJoe Grenn
≥7years on the filingsJohn Hellmann

Latest return

year to 31 December 2024iFigures from the newest Form 990 or 990-EZ in the IRS e-file releases of 2025 and 2026, for the year ending 31 December 2024. US dollars, as filed.
Total assets
$139k
Total liabilities
$0
Net assets or fund balances
$139k
Contributions and grants received
$88k
Program service revenue
$115k
Employees
2
Volunteers
270

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$213k$208k$4k

As filed on the IRS Form 990. US dollars.