Sealed proof · filed Form 990-PF

THE ARMSTRONG FOUNDATION

EIN 84-1612524, tax year January 1, 2025 to December 31, 2025. The return the foundation filed, as the IRS published it, with its arithmetic re-done exactly and sealed September 28, 2026.

This is the latest return the IRS has published for this foundation, for the tax year ended 2025-12-31. The IRS received it on May 15, 2026.

The answer

Nothing carried into the next year: the return shows the year’s amount paid within the year.

Every line we re-do agrees with the return as filed.

One field, no account. A person writes to you with the page. Your address goes on our contact list beside this foundation’s name. The page stays either way.

Keep this record for the foundation, year on year: the Filing Record, the foundation’s own order, cancellable in writing for a full refund until thirty days after the filing deadline.

Qualifying distributions4.14×

the distributable amount (Part XI ÷ Part X)

Carried to next year$0

undistributed income, Part XII: nothing carried into the next year

Distributions as a rate19.5%

of net noncharitable-use assets; the legal test is the distributable amount, not this rate

Assets at fair market value$35.4M

end of the tax year, Part II

Largest listed stock50.8%

TOU STOCK

If that stock halved−25.4%

of total assets, from that one name

Keep This Record

Filing Record: $2,600 a year, direct or at cost through the firm that prepares the return. This page stays whether or not the foundation buys anything. Cancel in writing for any reason, any time up to 30 days after your statutory 990-PF filing deadline (or 12 months from invoice, whichever is earlier): the year is refunded in full to the payer, and seals already generated remain checkable. Or write to a person →

Nothing here can be changed quietly. Try it

THE ARMSTRONG FOUNDATION · Form 990-PF, year ended December 31, 2025checking
Recomputing the seal in your browser…
The foundation’s own public return, sealed through the same free action as yours. Your edits stay in this page: nothing is sent and nothing is saved. A sealed copy shows nothing changed; it does not show the original was correct.

This page’s own short link: paretoalphasystems.com/p/b118f875bf64 — it fits on a printed page, and whoever opens it can run the same check.

The return’s own arithmetic, re-done

Each line as filed and as recomputed
LineAs filedRecomputedResult
Minimum investment return: 5% of net noncharitable-use assets (Part IX line 6)$1,639,117$1,639,117.45recomputes, within the form's whole-dollar rounding (difference −$0.45)
Excise tax: 1.39% of net investment income (Part V line 1)$94,630$94,629.5181recomputes, within the form's whole-dollar rounding (difference $0.4819)
Distributable amount: minimum investment return − taxes + recoveries − deduction (Part X line 7)$1,544,487$1,544,487recomputes exactly

Where the assets sit, at fair market value

Assets by Part II line, at fair market value
Part II lineFair market valueShare of assets
Cash (line 1)$9.3M26.3%
Corporate stock (line 10b)$25.9M73.1%

The ten largest listed stocks, of 2 on the schedule

The schedule ties to Part II line 10b exactly. It behaves like 1.7 equal holdings; the ten largest are 100.0% of the listed stock.

The ten largest listed stocks
Stock, as listedFair market valueShare of assets
TOU STOCK$18M50.8%
UBS TRANSFERRED FROM VENTURES$7.9M22.3%

What the foundation answered on the form

  • Part VI-B 4a: did the foundation invest during the year in a manner that would jeopardize its charitable purposes? No
  • Part VI-B 4b: did it make any investment in a prior year that could jeopardize its charitable purpose and that had not been removed from jeopardy? No
  • Part VI-B 3a: did it hold more than a 2% direct or indirect interest in any business enterprise? No
  • Part VI-B 3b: did it have excess business holdings? Not answered (3a is “No”, so the form does not ask 3b. Our note; not part of the seal.)
  • Part VI-B 2a: did it have undistributed income for prior years? No

Quoted as filed. These are the foundation’s own answers; this page does not test them.

Control statement · nine controls

Nine controls, read from the return.

Each control reads one part of the filed return and states a fact in a fixed vocabulary: agrees, differs, reported, not reported, not applicable, not checked. Whether any of it met a requirement is counsel’s question, not this page’s.

Recomputed each time the page is read; not part of the seal. The seal covers the body above (controls v2, kernel@2026-09-15.1).

This return: 4 agree, 4 reported, 1 not checked.

ControlReadsResultDetail
Minimum investment returnPart IX line 6 against 5% of line 5, prorated for a short yearagreesFiled $1,639,117; recomputed $1,639,117.45; agrees within the form's whole-dollar rounding.
Excise taxPart V line 1 against 1.39% of net investment incomeagreesFiled $94,630; recomputed $94,629.51; agrees within the form's whole-dollar rounding.
Distributable amountPart X line 7 against the form's own chain from line 1agreesFiled $1,544,487; recomputed $1,544,487; agrees to the dollar.
Payout coveragePart XI total against Part X line 7reportedQualifying distributions $6,393,726 against a distributable amount of $1,544,487 (4.14×).
Payout deadlinePart XII undistributed income and the date it falls duereportedPart XII reports $0 undistributed income for the year ended 31 December 2025: nothing carried into the next year, so nothing from this year falls due by 31 December 2026.
Holdings tie-outThe corporate-stock schedule against Part II line 10bagrees2 listed holdings sum to Part II line 10b exactly; the largest is 50.8% of total assets.
The foundation's own answersPart VI-B 2a, 3a, 3b, 4a and 4b, each answeredreportedAll 4 answered No (3b not asked: 3a is No).
Filing timelinessThe e-file timestamp beside the original due date and the extension window, each with its IRC §7503 roll to the next business dayreportedReturn timestamped 15 May 2026; the original due date was 15 May 2026; the six-month extension window ended 15 November 2026 (a Sunday, so 16 November 2026 under IRC §7503). Whether an extension was granted is not visible in the e-file; the timestamp is the preparer software's, not the IRS receipt.
Year-to-year continuityThis year's opening balances against last year's closingnot checkedNeeds the prior year's return; one sealed year cannot check itself.

A line that differs is the return’s figure beside the recomputed one, as filed and as recomputed. The return may carry a reason this page cannot read: a schedule filed on paper, an election, a later amendment. It is not a finding. The page is not indexed. It is read by whoever holds the link: the person who asked for it, and anyone the foundation sends it to, its preparer first.

Year-to-year continuity needs two filed years on record. The years, below, reads this foundation’s filed returns in order and holds each against the one before.

The calendar ahead

A payout is owed on last year’s assets, whatever this year’s market does.

Recomputed each time the page is read; not part of the seal. The seal covers the body above (forward v2, kernel@2026-09-15.1). Read against October 8, 2026.

ByWhatAmountBasis
May 17, 2027Excise tax on the year ending 31 December 2026, due with that return by 15 May 2027 (a Saturday, so 17 May 2027 under IRC §7503)$94,629Projected under the assumptions below
December 31, 2027Distributable amount for the year ending 31 December 2026, to be paid out$1,544,487Projected under the assumptions below

If net noncharitable-use assets fell 20% over the coming year: what is owed now, nothing from Part XII, is unchanged; the following year’s minimum investment return would be $1,311,293, $327,823 less than the projection.

The assumptions, the forward kernel proof, and what was refused
  • Net noncharitable-use assets for the year ending 31 December 2026 equal this return's Part IX line 5, $32782349; the thirteen-month average is not observable from a filing.
  • Net investment income for that year equals this return's, $6807879.
  • No recoveries, income tax or deduction next year; the rates stay 5% and 1.39%; a full tax year.
  • The fall shown is 20% of net noncharitable-use assets, applied to next year's average only; what is already owed was computed on this year's average and is unchanged.
  • Forward kernel proof (the projection’s own, recomputed, not sealed) b90307bb7797b47e… · kernel@2026-09-15.1 · forward v2, controls v2
  • A projection under the stated assumptions, from the foundation's own filed figures; not a forecast, not advice.
  • The foundation's preparer computes the actual amounts from the year's monthly values; this page states what the last return implies if nothing changes.
  • What is already owed was computed on last year's average assets and does not change with this year's market.

Walk through it with a person →

The years · carryover chain

One return is one year. The payout is kept across six.

What a foundation leaves undistributed is due by the end of the next tax year, and what it distributes beyond the year’s amount may be applied in the five years after. So what is owed, and what may be set against it, is only readable across the filed years. The IRS publishes those years; this reads them in order, re-adds each Part XII, and holds each year’s opening lines against the year before’s closing lines.

Sealed under a hash of their own the first time they are opened; not part of the seal above.

Up to six filed returns, read from the IRS and sealed under one hash, at a page of their own. Nothing about you is recorded.

The seal

Recomputed just now: it matches what was sealed on September 28, 2026. Anyone can check it without us.

For your auditor: what this hash is over, and how to check it from the IRS’s own file
proof b118f875bf64978c88aece36cf9cef7bc8734e4c52fbad1e446c9de64fdaebac · recomputed now, matches
return Form 990-PF, IRS object 202641359349104024, schema 2025v4.1 — the file as the IRS published it hashes to df46d9f5727ae92f…
source file 202641359349104024_public.xml inside 2026_TEOS_XML_05B.zip at irs.gov — not part of the seal; fetch it yourself with verify_proof.py b118f875bf64 --fetch
arithmetic kernel@2026-09-15.1 · kernel proof aceb2d6169aaaadc…
rules b839212b6742304a91af2ff9e04e24acdb32ac9fd48760e6b89289b532c4c45b · commit 7dd856f88a5e — the digest of the 990-PF rules this proof was sealed under (body v2); a proof of the same return under later rules names this hash as superseded

This page is not listed on this site and asks search engines not to index it. It is reached by its link, which whoever asked for it holds.

This foundation’s finance lead or counsel: to add a note beside this page, ask for a correction, or keep the record, write to us.

11,842 foundation returns re-done by the same code; in 11,827 every line we recompute agrees. The study.

This page stays whether or not the foundation buys anything.

Filing Record: $2,600 a year, direct or carried at cost by the firm that prepares the return.

Check It at /verifyKeep This Record
The program, and the full body that was hashed
let total_assets_fmv = 35380018 USD
let mix_cash = share(9294903 USD, total_assets_fmv)
let mix_stock = share(25867656 USD, total_assets_fmv)
let net_noncharitable_assets = 32782349 USD
let mir_filed = 1639117 USD
let mir_recomputed = net_noncharitable_assets * 5%
let mir_difference = mir_filed - mir_recomputed
let net_investment_income = 6807879 USD
let excise_filed = 94630 USD
let excise_recomputed = net_investment_income * 1.39%
let excise_difference = excise_filed - excise_recomputed
let distributable_filed = 1544487 USD
let distributable_recomputed = 1639117 USD - 94630 USD + 0 USD - 0 USD
let distributable_difference = distributable_filed - distributable_recomputed
let qualifying_distributions = 6393726 USD
let payout_coverage = qualifying_distributions / distributable_filed
let payout_rate = share(qualifying_distributions, net_noncharitable_assets)
let undistributed_to_next_year = 0 USD
let stocks = [17960910 USD, 7906746 USD]
let stock_count = count(stocks)
let largest_stock = max(stocks)
let largest_stock_share_of_assets = share(largest_stock, total_assets_fmv)
let top10_share_of_stock = share(sum([17960910 USD, 7906746 USD]), sum(stocks))
let stock_concentration = hhi(stocks)
let effective_stock_holdings = 1 / stock_concentration
let largest_stock_halved_share_of_assets = share(largest_stock * 50%, total_assets_fmv)
{
  "mix": [
    {
      "fmv": "9294903",
      "line": "cash",
      "label": "Cash (line 1)",
      "share": "0.262716174988944324448902202367"
    },
    {
      "fmv": "25867656",
      "line": "stock",
      "label": "Corporate stock (line 10b)",
      "share": "0.731137446001299377518688656405"
    }
  ],
  "kind": "public-filing-990pf",
  "lens": "AXIOM",
  "build": {
    "commit": "7dd856f88a5ecf553ea48f52397c50a503af0e0d",
    "digest": "b839212b6742304a91af2ff9e04e24acdb32ac9fd48760e6b89289b532c4c45b"
  },
  "filer": {
    "ein": "841612524",
    "name": "THE ARMSTRONG FOUNDATION"
  },
  "scope": [
    "Every figure here is the foundation's own filed return or exact arithmetic on it; nothing is estimated.",
    "A 990-PF is a year-end snapshot. Prudence is judged at the time of each decision, which a filing cannot show.",
    "This page neither establishes nor rules out any tax consequence, and no return is prepared or amended here.",
    "A line that differs is the return's figure beside the recomputed one, as filed and as recomputed. The return may carry a reason this page cannot read: a schedule filed on paper, an election, a later amendment. It is not a finding."
  ],
  "checks": [
    {
      "id": "minimum_investment_return",
      "note": null,
      "filed": "1639117",
      "label": "Minimum investment return: 5% of net noncharitable-use assets (Part IX line 6)",
      "verdict": "rounding",
      "difference": "-0.45",
      "recomputed": "1639117.45"
    },
    {
      "id": "excise_tax",
      "note": null,
      "filed": "94630",
      "label": "Excise tax: 1.39% of net investment income (Part V line 1)",
      "verdict": "rounding",
      "difference": "0.4819",
      "recomputed": "94629.5181"
    },
    {
      "id": "distributable_amount",
      "note": null,
      "filed": "1544487",
      "label": "Distributable amount: minimum investment return − taxes + recoveries − deduction (Part X line 7)",
      "verdict": "exact",
      "difference": "0",
      "recomputed": "1544487"
    }
  ],
  "engine": "kernel@2026-09-15.1",
  "source": {
    "form": "990-PF",
    "lines": {
      "netInvestmentIncome": "6807879",
      "grossInvestmentIncome": "6843906",
      "netNoncharitableAssets": "32782349",
      "undistributedCurrentYear": "0"
    },
    "period": {
      "end": "2025-12-31",
      "days": 365,
      "begin": "2025-01-01"
    },
    "amended": false,
    "foreign": {
      "organization": false,
      "meets85PctTest": false
    },
    "objectId": "202641359349104024",
    "returnTs": "2026-05-15T15:06:56-05:00",
    "operating": false,
    "sourceSha256": "df46d9f5727ae92f7aaafc150a1292756fd0e15742164209017eeea7e2ad74fd",
    "returnVersion": "2025v4.1",
    "partXBoxChecked": false
  },
  "answers": [
    {
      "answer": "No",
      "question": "Part VI-B 4a: did the foundation invest during the year in a manner that would jeopardize its charitable purposes?"
    },
    {
      "answer": "No",
      "question": "Part VI-B 4b: did it make any investment in a prior year that could jeopardize its charitable purpose and that had not been removed from jeopardy?"
    },
    {
      "answer": "No",
      "question": "Part VI-B 3a: did it hold more than a 2% direct or indirect interest in any business enterprise?"
    },
    {
      "answer": "Not answered",
      "question": "Part VI-B 3b: did it have excess business holdings?"
    },
    {
      "answer": "No",
      "question": "Part VI-B 2a: did it have undistributed income for prior years?"
    }
  ],
  "program": "let total_assets_fmv = 35380018 USD\nlet mix_cash = share(9294903 USD, total_assets_fmv)\nlet mix_stock = share(25867656 USD, total_assets_fmv)\nlet net_noncharitable_assets = 32782349 USD\nlet mir_filed = 1639117 USD\nlet mir_recomputed = net_noncharitable_assets * 5%\nlet mir_difference = mir_filed - mir_recomputed\nlet net_investment_income = 6807879 USD\nlet excise_filed = 94630 USD\nlet excise_recomputed = net_investment_income * 1.39%\nlet excise_difference = excise_filed - excise_recomputed\nlet distributable_filed = 1544487 USD\nlet distributable_recomputed = 1639117 USD - 94630 USD + 0 USD - 0 USD\nlet distributable_difference = distributable_filed - distributable_recomputed\nlet qualifying_distributions = 6393726 USD\nlet payout_coverage = qualifying_distributions / distributable_filed\nlet payout_rate = share(qualifying_distributions, net_noncharitable_assets)\nlet undistributed_to_next_year = 0 USD\nlet stocks = [17960910 USD, 7906746 USD]\nlet stock_count = count(stocks)\nlet largest_stock = max(stocks)\nlet largest_stock_share_of_assets = share(largest_stock, total_assets_fmv)\nlet top10_share_of_stock = share(sum([17960910 USD, 7906746 USD]), sum(stocks))\nlet stock_concentration = hhi(stocks)\nlet effective_stock_holdings = 1 / stock_concentration\nlet largest_stock_halved_share_of_assets = share(largest_stock * 50%, total_assets_fmv)",
  "results": {
    "mix_cash": "0.262716174988944324448902202367",
    "mir_filed": "1639117 USD",
    "mix_stock": "0.731137446001299377518688656405",
    "payout_rate": "0.19503562725172622620789010574",
    "stock_count": "2",
    "excise_filed": "94630 USD",
    "largest_stock": "17960910 USD",
    "mir_difference": "-0.45 USD",
    "mir_recomputed": "1639117.45 USD",
    "payout_coverage": "4.13970852457806378428565601394",
    "total_assets_fmv": "35380018 USD",
    "excise_difference": "0.4819 USD",
    "excise_recomputed": "94629.5181 USD",
    "distributable_filed": "1544487 USD",
    "stock_concentration": "0.575534921225182238080607186802",
    "top10_share_of_stock": "1",
    "net_investment_income": "6807879 USD",
    "distributable_difference": "0 USD",
    "distributable_recomputed": "1544487 USD",
    "effective_stock_holdings": "1.73751402933331772960874731656",
    "net_noncharitable_assets": "32782349 USD",
    "qualifying_distributions": "6393726 USD",
    "undistributed_to_next_year": "0 USD",
    "largest_stock_share_of_assets": "0.507656892656188021159288273963",
    "largest_stock_halved_share_of_assets": "0.253828446328094010579644136982"
  },
  "version": 2,
  "holdings": {
    "tie": "exact",
    "top": [
      {
        "fmv": "17960910",
        "name": "TOU STOCK",
        "shareOfAssets": "0.507656892656188021159288273963"
      },
      {
        "fmv": "7906746",
        "name": "UBS TRANSFERRED FROM VENTURES",
        "shareOfAssets": "0.223480553345111356359400382442"
      }
    ],
    "count": 2,
    "schedule": "Corporate stock (line 10b)"
  },
  "refusals": [],
  "blankLines": [],
  "kernelProof": "aceb2d6169aaaadc142659b3a4730dc2633c85782f24a4e85327a8f62b2bdeec",
  "otherInvestments": []
}

The seal’s own scope:

  • Every figure here is the foundation's own filed return or exact arithmetic on it; nothing is estimated.
  • A 990-PF is a year-end snapshot. Prudence is judged at the time of each decision, which a filing cannot show.
  • This page neither establishes nor rules out any tax consequence, and no return is prepared or amended here.
  • A line that differs is the return's figure beside the recomputed one, as filed and as recomputed. The return may carry a reason this page cannot read: a schedule filed on paper, an election, a later amendment. It is not a finding.

We don’t prepare or file a 990-PF. We read the one the foundation filed, re-do its arithmetic exactly, and seal what it says.