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US nonprofit · EIN 821435767 · Boulder, COiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 821435767) - 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.Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.State registers Colorado Secretary of State (17 October 2026).Licence US Federal Government public domain.How we handle data

500 Women Scientists

Donations deductible
Revenue
$25k
year to 31 December 2024
Expenses
$20k
year to 31 December 2024
Total assets
$49k
$0 liabilities
Net assets
$49k
assets less liabilities
Directors and trustees
4
6.4 years on average
Staff
0
10 volunteers
Left since last filing
0
no seats appear to have opened
Officers and senior staff
2
named in Part VII
How am I connected?

500 Women Scientists' network

4 peoplei4 people on this map.The large node is the subject of this page. Solid lines are what the register itself records (4). Form 990 filings give names without a person identifier; SEC insider filings carry a CIK.

The board

4 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 4 voting members of its governing body on its latest Form 990 Part VI, which matches the board listed here.
NameRole as filedSinceOn the board
Kelly RamirezBoard2018
8 yrs
Liz McCullaghBoard2024
2 yrs
Tamara ZelikovaBoard2018
8 yrs
Theresa JeddBoard2020
6 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
Kelly RamirezOfficer2019
Tamara ZelikovaOfficer2019

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
Tamara ZelikovaBoard1$0
Kelly RamirezBoard1$0
Theresa JeddBoard1$0
Liz McCullaghBoard1$0

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

Colorado roster

4 listediOfficers, directors and trustees from the latest filing with the Colorado Secretary of State (document 20253029322). Titles are as filed; some entries are registered agents or custodians of records rather than board members. Source: data.colorado.gov, public domain.
NameTitle as filed
Kelly RamirezOfficer
Tamara ZelikovaPresident
Kelly Sierra RamirezCo-President
Tamara Zelikova

About

Legal name
500 Women Scientists
EIN
821435767
Address
Po Box 17331, Boulder, CO, 80308-0331
State
Colorado
Mission
The vision of 500 women scientists is to be the foremost organization for the transformation of leadership, diversity, and public engagement in science (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
3 (IRS master file code)
Formed
2016
Principal officer
Tamara Zelikova (as named on the Form 990)
IRS ruling date
1 May 2018
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 filingsKelly Ramirez
≥8years on the filingsTamara Zelikova
≥6years on the filingsTheresa Jedd
≥2years on the filingsLiz McCullagh

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
$49k
Total liabilities
$0
Net assets or fund balances
$49k
Contributions and grants received
$25k
Program service revenue
$0
Employees
0
Volunteers
10

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$25k$20k$5k

As filed on the IRS Form 990. US dollars.

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.
500 Women Scientists 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: Colorado Secretary of State (CDOS), business entities (data.colorado.gov 4ykn-tg5h). Licence: public domain. Data last fetched 18 October 2026.
State
Colorado
Entity type
nonprofit corporation
Status
Delinquent
Formed
5 May 2017
Registered agent
Colorado Registered Agents (city and state not held)

This register does not publish officers or directors.