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US nonprofit · EIN 133542980 · Washington, DCiSource and licenceOrganisation record IRS Exempt Organizations Business Master File (EIN 133542980) - 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, 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. Not a statement that the organisation is recruiting.Exemption status IRS Automatic Revocation of Exemption List (posted to 13 October 2026).Deductibility IRS Publication 78 data (code PC), downloaded 18 October 2026.State registers California Attorney General (7 October 2026).Licence US Federal Government public domain.How we handle data

Space Frontier Foundation Inc

Donations deductible
Revenue
$123k
year to 31 December 2024
Expenses
$213k
year to 31 December 2024
Total assets
$368k
$0 liabilities
Net assets
$368k
assets less liabilities
Directors and trustees
11
3.2 years on average
Staff
0
15 volunteers
Chair observed
≥1 yr
Sean Mahoney
Left since last filing
0
no seats appear to have opened
Exemption reinstated on 15 May 2022. The IRS had automatically revoked it on 15 May 2022 (after three years without a return). Source: IRS Automatic Revocation of Exemption List, posted to 13 October 2026.
How am I connected?

Space Frontier Foundation Inc's network

11 people3 organisationsi11 people and 3 organisations on this map.The large node is the subject of this page. Solid lines are what the register itself records (11). Violet dotted lines (3) 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

11 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.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 250 voting members of its governing body on its latest Form 990 Part VI; we list 11 in Part VII (Part VII does not always name every voting member).
NameRole as filedSinceOn the board
Sean Mahoney ChairBoard Chair2023
3 yrs
Aaron OesterleDirector2024
2 yrs
Eric IngramDirector2023
3 yrs
Jim MuncyDirector2023
3 yrs
Libby LoydDirector2023
3 yrs
Malak CrispDirector2023
3 yrs
Megan BennettDirector2023
3 yrs
Michael MeallingDirector2023
3 yrs
Miekkal ClarksonDirector2023
3 yrs
Quade MacdonaldDirector2023
3 yrs
Taylor WinklemanDirector2024
2 yrs
Under 5 years5 to 6 years6 years or moreShow all 11 →

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
Aaron OesterleDirector15$42k
Sean MahoneyBoard Chair8$20k
Taylor WinklemanDirector0$0
Miekkal ClarksonDirector0$0
Michael MeallingDirector0$0
Eric IngramDirector0$0
Jim MuncyDirector0$0
Libby LoydDirector0$0
Malak CrispDirector0$0
Megan BennettDirector0$0
Quade MacDonaldDirector0$0

About

Legal name
Space Frontier Foundation Inc
EIN
133542980
Address
1455 Pennsylvania Ave Nw Ste 400, Washington, DC, 20004-1017
State
District of Columbia
Mission
Education of the public on issues of space exploration, development and settlement, and the development and settlement of space by nongovernmental means. (as filed on the Form 990)
Activity (NTEE)
U01 Science and technology research
IRS classification
501(c)03 (tax-exempt under section 501(c)(3) where shown)
Classified purpose
Science & Technology
Size band
4 (IRS master file code)
Formed
1988
Principal officer
Sean Mahoney (as named on the Form 990)
IRS ruling date
1 November 1990
Status
Code 01 (unconditional exemption)
Form 990 filings on record
2, latest 2024
IRS Publication 78
PC (contributions deductible)

Most connected

Longest observed on the filings

≥3years on the filingsSean Mahoney
≥3years on the filingsEric Ingram
≥3years on the filingsJim Muncy
≥3years on the filingsLibby Loyd

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
$368k
Total liabilities
$0
Net assets or fund balances
$368k
Contributions and grants received
$100k
Program service revenue
$7k
Employees
0
Volunteers
15

Filed finances

1 yeariTotals as filed on the IRS Form 990 (revenue and expenses), by tax year.
Tax yearTotal revenueTotal expensesSurplus or deficit
2024$123k$213kDeficit $90k

As filed on the IRS Form 990. US dollars.

Grants paid

1 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
Beyond Earth Institute$8k