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US nonprofit · EIN 300003353 · San Ramon, CAiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 300003353) - 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 - 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. Not a statement that the organisation is recruiting.Principal officer IRS Form 990-N (e-Postcard) - principal officer named for tax year 2014.Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.Licence US Federal Government public domain.How we handle data

Women in Thoracic Surgery Inc

Donations deductible
Revenue
$619k
year to 31 December 2024
Expenses
$550k
year to 31 December 2024
Total assets
$451k
$19k liabilities
Net assets
$432k
assets less liabilities
Directors and trustees
9
4.2 years on average
Staff
0
78 volunteers
Left since last filing
0
no seats appear to have opened
Officers and senior staff
1
named in Part VII
How am I connected?

Women in Thoracic Surgery Inc's network

9 peoplei9 people on this map.The large node is the subject of this page. Solid lines are what the register itself records (9). Form 990 filings give names without a person identifier; SEC insider filings carry a CIK.

The board

9 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.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. The organisation reported 9 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Daniela Molena MD (also filed as Daniela Molena)President2020
6 yrs
Hannah CopelandTreasurer2024
2 yrs
Lana SchumacherDirector at Large2023
3 yrs
Lauren Kane MD (also filed as Lauren Kane)Immediate Past President2020
6 yrs
Leah Backhus MD (also filed as Leah Backhus)Director at Large2020
6 yrs
Lisa BrownDirector at Large2023
3 yrs
Mara AntonoffVice-President and Preside2023
3 yrs
Mimi Ceppa MD (also filed as Mimi Ceppa)Director at Large2024
2 yrs
Stephanie WorrellCompany secretary2023
3 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
Beth WinerExecutive Director2020

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
Lauren KaneImmediate Past President1$0
Daniela MolenaPresident5$0
Leah BackhusDirector at Large1$0
Mara AntonoffVice-President and Preside3$0
Hannah CopelandTreasurer0.5$0
Stephanie WorrellSecretary1$0
Lana SchumacherDirector at Large1$0
Lisa BrownDirector at Large1$0
Mimi CeppaDirector at Large1$0

No pay was reported for anyone in Part VII on this return.

About

Legal name
Women in Thoracic Surgery Inc
EIN
300003353
Address
2603 Camino Ramon Ste 200, San Ramon, CA, 94583-9137
State
California
Mission
The mission of women in thoracic surgery, inc. Is to create a supportive community to optimize the advancement of women in cardiothoracic surgery. (as filed on the Form 990)
Activity (NTEE)
H40 Medical research
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Medical Research
Size band
4 (IRS master file code)
Formed
2001
Principal officer
Mara Antonoff (as named on the Form 990)
IRS ruling date
1 May 2002
Status
Code 01 (unconditional exemption)
Form 990 filings on record
4, latest 2024
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥6years on the filingsDaniela Molena MD
≥6years on the filingsLauren Kane MD
≥6years on the filingsLeah Backhus MD
≥3years on the filingsLana Schumacher

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
$451k
Total liabilities
$19k
Net assets or fund balances
$432k
Contributions and grants received
$584k
Program service revenue
$23k
Employees
0
Volunteers
78

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$619k$550k$70k

As filed on the IRS Form 990. US dollars.