Speed of Light - the Astro Foundation
Arlington, VA · EIN 51-0178702. Reported 51 grants totalling $1,699,683 to 24 organizations across tax years 2021-2025, on Form 990 Schedule I.
Does this grantmaker accept applications?
Its tax return does not say, and we will not guess. Private foundations file Form 990-PF, which asks outright whether they fund only organizations they select themselves -- 78% say yes, and that one answer is what lets the rest of this site tell you which foundations are worth approaching. Grantmaking charities like this one file a regular Form 990 instead, and the IRS never puts the question to them. Anyone claiming to know the answer from the filing is inventing it.
Three things in the filing do bear on it:
- What kind of organization it is. For Speed of Light - the Astro Foundation, the IRS classifies it under diseases & disorders rather than as a grantmaker (NTEE G30) -- it is an operating charity that also makes grants.
- How spread out its giving is. 24 distinct organizations, with 9% of the dollars going to the largest single recipient. That is genuinely spread out -- the mark of a funder making many independent decisions rather than underwriting one institution.
- How much its list changes. 62% of one year's grantees are funded again the next, across 4 year-to-year transitions. That is about the 56% median for grantmaking charities -- lower than the 67% median for private foundations. It describes the organizations it already funds, not whether it would consider a new one.
How big are its grants?
The median reported grant is $33,484. Half of what it reported fell between $24,250 and $45,917; the smallest was $10,000 and the largest $83,880. If you are asking for materially more than the top of that range, you are asking the wrong organization.
Every organization it funded
This is the complete list from its filings, largest first. Recipients are grouped by the EIN the filer reported, not by name, so an organization that was typed differently in two years appears once rather than twice.
| Organization | Location | Total received | Grants | Years funded | Last |
|---|---|---|---|---|---|
| University Hospitals Health System Inc | Shaker Hts, OH | $150,428 | 3 | 3 | 2024 |
| Mass General Brigham Incorporated | Somerville, MA | $128,820 | 4 | 4 | 2024 |
| University of Texas MD Anderson Cancer Center | Houston, TX | $125,048 | 3 | 3 | 2023 |
| Mass General Brigham Incorporated | Somerville, MA | $124,922 | 2 | 2 | 2022 |
| Johns Hopkins University | Baltimore, MD | $113,534 | 3 | 3 | 2024 |
| University Tx Southwestern Medical Center Dallas | Dallas, TX | $101,013 | 3 | 3 | 2025 |
| Montefiore Medical Center | Bronx, NY | $97,135 | 3 | 3 | 2025 |
| Baylor College of Medicine | Houston, TX | $91,834 | 2 | 2 | 2025 |
| University of California San Francisco | San Francisco, CA | $84,993 | 3 | 3 | 2025 |
| Washington University | St Louis, MO | $83,880 | 1 | 1 | 2025 |
| University of North Carolina at Chapel Hill | Chapel Hill, NC | $71,557 | 2 | 2 | 2024 |
| Mayo Clinic | Rochester, MN | $66,968 | 2 | 2 | 2024 |
| University of Chicago | Chicago, IL | $55,555 | 1 | 1 | 2022 |
| Board of Regents of the University of Oklahoma Health | Oklahoma City, OK | $52,000 | 1 | 1 | 2025 |
| American Society for Radiation Oncology | Arlington, VA | $50,000 | 5 | 5 | 2025 |
| Icahn School of Medicine at Mount Sinai | New York, NY | $50,000 | 2 | 2 | 2023 |
| New York University | New York, NY | $50,000 | 2 | 2 | 2024 |
| Regents Univ of California | Los Angeles, CA | $50,000 | 2 | 2 | 2025 |
| Trustees of the University of Pennsylvania | Philadelphia, PA | $37,312 | 1 | 1 | 2025 |
| University of Florida | Gainesville, FL | $33,484 | 1 | 1 | 2022 |
| Regents of the University of California at San Diego | La Jolla, CA | $27,500 | 2 | 2 | 2023 |
| University of Alabama of Birmingham | Birmingham, AL | $23,058 | 1 | 1 | 2023 |
| Regents of the University of Minnesota | Minneapolis, MN | $15,642 | 1 | 1 | 2021 |
| Rutgers the State University | Piscataway, NJ | $15,000 | 1 | 1 | 2021 |
16 of 24 (67%) received money in more than one year over the 5 years we hold. Remember the $5,000 floor: an organization funded every year at $3,000 shows up here as never funded at all.
What the money was for
Taken verbatim from the purpose column of its filings, largest first. This is the closest thing to a statement of what it funds, in its own words.
- Massachusetts General Hospital-Research Finance
LIQUID BIOPSY-GUIDED TRIMODALITY THERAPY FOR MUSCLE-INVASIVE BLADDER CANCER - University Tx Southwestern Medical Center Dallas
CIRCULATING EXOSOME-BASED BIOMARKER FOR TREATMENT MONITORING IN ANAL CANCER - Brigham and Women's Hospital
SERIAL MRIRADIOMIC BIOMARKER TO PERDICT CEREBRAL RADIATION NECROSIS - John Hopkins University
AN INCLUSIVE GRADING SYSTEM FOR ASSESSING ACUTE RADIATION ONCOLOGY FUNDING OPPORTUNITY - University of Tx MD Anderson Cancer Center
MICROBIOME PROFILE AS A BIOMARKER OF RESPONSE IN RESECTED PANCREATIC CANCER - Regents of the University of Minnesota
EVALUATION OF DISPARITIES IN ONCOLOGY CARE AMONG THE LGBTQ COMMUNITY
What kind of organizations it funds
By the activity category the IRS assigns each recipient, for the 15 of 24 recipients we could match to a registered organization. The categories are the IRS's, not ours -- Schedule I reports the recipient's EIN, so this is a lookup rather than a name match.
Giving by year
| Tax year | Grants reported | Total | Median grant |
|---|---|---|---|
| 2021 | 8 | $214,699 | $24,562 |
| 2022 | 11 | $411,495 | $37,742 |
| 2023 | 13 | $408,090 | $25,000 |
| 2024 | 10 | $326,153 | $31,152 |
| 2025 | 9 | $339,246 | $34,993 |
Tax years, not calendar years, and the most recent year is usually incomplete -- Form 990 arrives about a year after the year it covers, so a low final year means late paperwork rather than a grantmaker winding down.
Where its money goes
19% of its giving went to organizations in Texas. Community foundations and federated funds are usually the most geographically bounded funders there are -- being outside the footprint is normally disqualifying in a way that a weak programme fit is not.
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Funders that support the same organizations
These grantmakers and private foundations gave to organizations this one also funded. Shared grantees are a sign of overlapping priorities and nothing more: they do not show that any of these funders would consider a new organization. Each page says what its filings show.
How to approach this grantmaker
- Look for a published programme first. Unlike most private foundations, organizations of this kind often do run open, deadlined grant cycles with written guidelines. Its own website is the authority on that; this page is the authority on who it has actually paid.
- Check you are its size. The median reported grant is $33,484 -- and because grants under $5,000 need not be reported, it very likely writes smaller cheques than this page can see.
- Check you are in its geography. Its giving concentrates in Texas.
- Read the recipient list for organizations like yours. If nothing on it resembles your work, that is a real answer and a cheap one to get.
Related guides
Where these numbers come from
Everything above is taken from Speed of Light - the Astro Foundation's own Form 990 Schedule I filings, which the IRS publishes in bulk. We used 5 returns (tax years 2021-2025). Grant figures are from its returns. Recipient classifications, the concentration and retention figures and the funders that support the same organizations are our own calculations from them, described in how we build this.
On its most recent return it told the IRS it made grants to 8 section 501(c)(3) organizations and 1 other organizations. That is the filer's own count for one year; the totals above cover every year we hold.
Address of record on the latest return: 251 18TH St South 8TH Floor, Arlington, VA, 22202.
EIN 51-0178702 · See the original filings on ProPublica · How we build this
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