Washington, D.C. · Nonprofit
Second Amendment Institute
Second Amendment Institute (Washington, D.C.) receives grants from 3 organizations whose IRS filings report $16,622 to it, the largest being HENDERSON FOUNDATION ($10,000). 2 of them have funded it in more than one year.
Against its field
Second Amendment Institute runs a healthier operating margin than three-quarters of the 177 education nonprofits its size.
this organization peer median middle 50% of peers· 177 education nonprofits under $100k, FY2026
Three funders worth looking at
Grantmakers with no record of funding this organization, ranked by how strongly the co-funder graph and the mission embeddings agree. The evidence is in section 03.
- The Chase Foundation of Virginiashared fundersportfolio match
- Holman Foundation Incshared funders
- Bavarian Foundation Trustportfolio match
Who funds it, year by year
2020 → 2023: the base broadened from 1 funder to 2 funders, grant income rose $202 → $5k.
1 of 3 of your funders are donor-advised or pass-through sponsors (tagged DAF) — 10% of grant dollars received. That money is really individual donors directing a sponsor; the institutions to cultivate are the non-DAF funders.
From the IRS filings of Second Amendment Institute’s funders (the co-funder graph). Association, not causation. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
How concentrated its funding is
Second Amendment Institute leans on a few funders — its largest provides 60% of grant income and the top three 100%; half comes from just 1 funder.
the vertical line marks half of all grant income — 1 funder to its left
Largest funder’s share by year: 2020 100% · 2021 100% · 2022 91% · 2023 94% — diversifying over time.
“Effective funders” = inverse Herfindahl index (1 / Σ shareᵢ²) — the number of equal-sized funders that would give the same concentration. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Where its funders are
Second Amendment Institute draws 100% of its grant income from funders outside Washington, D.C., across 2 states in all.
In-state vs out-of-state, by year
Funder states come from each funder’s own filing. $2k arriving through sponsors registered in 1 stateis excluded from the map and the split above: a sponsor holds money on a donor’s behalf, so its registered address would place those dollars somewhere no donor need ever have been. Trends are read to FY2023, the last fiscal year that has finished arriving. FY2024–FY2026 are still being filed and are shown unshaded; they do not move any figure on this page.
Funders to approach
Grantmakers that don’t fund you yet, surfaced two ways: they back organizations that share your funders, or their grantees resemble your mission. The ones both signals agree on come first. Your 3 funders put you under-funded among the 386 organizations that share them.
- The Chase Foundation of Virginiashared fundersportfolio matchVA · backs 29 organizations that share your funders · its grantees resemble your mission
- Holman Foundation Incshared fundersNJ · backs 23 organizations that share your funders
- Bavarian Foundation Trustportfolio matchits grantees resemble your mission
- Midway USA Foundation Incportfolio matchits grantees resemble your mission
- Conservative Partnership Instituteportfolio matchits grantees resemble your mission
- Duane Durr Foundation Incportfolio matchits grantees resemble your mission
- American Future Fundportfolio matchits grantees resemble your mission
- Atlas Economic Research Foundationportfolio matchits grantees resemble your mission
- Foundation for Accountability Integrity & Research in Elections Fundportfolio matchits grantees resemble your mission
- 45committee Incportfolio matchits grantees resemble your mission
- Chiavacci Family Foundationportfolio matchits grantees resemble your mission
- The Krieble Foundationportfolio matchits grantees resemble your mission
From the co-funder graph (funders backing at least two comparable organizations, shrunk for grantee count, donor-advised and mega-funds excluded) and the universe embeddings. A research starting point; overlap is association, not a guarantee of fit.
Organizations like Second Amendment Institute
Nonprofits whose mission and program text most resemble this one, by semantic similarity over the universe of US filings — the closest peers, and often the clearest route to shared or prospective funders.
In Washington, D.C.
Nationally
Read directly from this organization’s own Form 990, as neutral context.
Public support
100%
Share of support from the public (Schedule A) — the basis for its public-charity status.
Footprint & structure
Files a return copy in 2 states
Screen this organization
A dated, signed PDF of the compliance screen for Second Amendment Institute: IRS status (Business Master File, Publication 78, auto-revocation), the OFAC sanctions lists, the Internal Revenue Bulletin, and California registration, with the Rev. Proc. 2018-32 §8.01 reliance elements stated element by element. Generated from the current files at the moment you download it.
Screens are triage, not determinations; a source that cannot be read reports not screened, never clear. How the screen works · on the API as GET /api/screening/{ein}?format=pdf
Questions and answers
- Who funds Second Amendment Institute?
- Second Amendment Institute (Washington, D.C.) receives grants from 3 organizations whose IRS filings report $16,622 to it, the largest being HENDERSON FOUNDATION ($10,000). 2 of them have funded it in more than one year.
- How many funders does Second Amendment Institute have?
- IRS filings report 3 organizations giving $16,622 in grants to Second Amendment Institute, 2 of which have funded it in more than one year.
- Who is the largest funder of Second Amendment Institute?
- HENDERSON FOUNDATION is the largest funder on record, with $10,000 in grants. The full list of funders is on this page.
- How can an organization like Second Amendment Institute find more funders?
- Start with the funders already giving here, then look at the foundations that back similar organizations in Washington, D.C.. The funding by cause and by state pages list the largest funders for a given area and how to approach them.
These figures are read directly from IRS Form 990 / 990-PF e-file XML: this organization’s own return for FY2026 (financials across 2026–2026), and the filings of 3funders that report grants to it. “On record” means captured in the filings we have parsed — a funder that does not e-file, or whose grant detail is not itemized, will not appear. Filings run roughly 12–24 months behind. Trends on this page end at FY2023, the last fiscal year that has finished arriving; later years are shown and marked, and move no figure. Data on this page was exported August 27, 2026. What this page cannot tell you · view filing