Latest 10-Q

What changed in Quantinuum Inc.'s latest quarterly report, compared with the one before.

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IPO prospectus

Quantinuum Inc.’s initial public offering: where it stands and what the registration statement says.

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Insider trades

Open-market trades from Form 4. 10b5-1 marks a plan set in advance.Open-market buys and sales by officers, directors and 10% owners, from SEC Form 4. A plan set in advance is marked 10b5-1.

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13F holders

Funds that report this stock, checked against market prices.Fund managers with over $100 million in US-listed stocks file a 13F each quarter, up to 45 days after quarter end. Long positions only.

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Trades by members of Congress

Disclosed in dollar ranges, up to 45 days after the trade.Members of Congress, their spouses and dependent children report trades in dollar ranges, up to 45 days after the trade.

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Lobbying

What Quantinuum Inc. and its lobbying firms report each quarter.A company that lobbies with its own staff reports its expenses; a lobbying firm it hires reports the income it received. We count both.

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Lobbying and contracts

$755.0K · — in 12 mo

What Quantinuum Inc. reported spending on lobbying next to the federal contracts it was awarded, by year.Lobbying: each report counts once. If a report was amended, only the newest version counts. Totals use the company's own report when it files one (it includes payments to hired firms); otherwise the hired firms' reported income. Registrations and reports with no amount are not counted. A firm that hands part of its work to another firm may report the same money as that other firm does; the filings do not allow us to tell. Contracts: each award is counted once, for the company that received it (or its listed parent when only the parent is matched), in the year of its first obligation. The amount is the total obligated to date, so a later increase is counted in the year the award began. Only awards of $1 million or more are collected. Agencies: the offices named on lobbying reports and the awarding agencies of contracts are matched to one department name (the Army, Navy and Air Force count as the Department of Defense; NIH, FDA and CMS as Health and Human Services). An agency is listed under both when the company lobbied it and was awarded a contract by it in the same period. Offices outside this list, and Congress, are not counted as agencies.

$0$200.0K$400.0K$600.0K$800.0K2024 · Lobbying: $100,0002024 · Federal contracts: $020242025 · Lobbying: $500,0002025 · Federal contracts: $020252026 YTD · Lobbying: $615,0002026 YTD · Federal contracts: $02026 YTD

Lobbying Federal contractsBoth bars use one dollar scale.

Lobbying and federal contracts of Quantinuum Inc. by year
Gifts by the company's PAC to candidates for Congress. They come from donations to the PAC, not from the company's own funds.
2026 (year to date)$615.0K12Science and technology, Budget and appropriations, TradeCommerce, State, Energy + 1 more—————
2025$500.0K17Science and technology, Budget and appropriations, TradeCommerce, State, Treasury + 3 more—————
2024$100.0K2Science and technology, TradeCommerce, State—————

Agencies both lobbied and awarding contracts

No agency appears on both sides in the last 12 months.

Lobbying and contract awards are reported separately; showing them together does not mean one caused the other.

All companies · Contract awards · Lobbying reports

Capitol Hires at Quantinuum Inc.

20 hires

Lobbyists for Quantinuum Inc. who say they once worked in Congress or the executive branch.

Capitol Hires at Quantinuum Inc.
The covered position the lobbyist says they held: an office of a member of Congress, a committee or an executive-branch body, as written in the filing. The member's name is a link only when exactly one member of Congress fits the name, chamber, first name and years given; otherwise it stays as written.The lobbying report (LDA form LD-2) that names this lobbyist and office, with a link to it. Report period is the quarter the report covers; Posted is the day it was filed or amended, which can be much later. The same lobbyist is named again on each quarterly report for the same client, so a row is shown once, from the newest report, with the number of filings that name them.
Garth SpencerU.S. Senate Committee on Homeland Security and Governmental Affairs
Committee
Professional Staff MemberQuantinuum LLC
Report period 2026 Q3 ↗
Posted Oct 19, 2026 · in 4 filings
Garth SpencerU.S. Department of Energy
Executive branch
Special Assistant, , ARPA-EQuantinuum LLC
Report period 2026 Q3 ↗
Posted Oct 19, 2026 · in 4 filings
Garth SpencerThomas R. Carper
Member office · Democrat-DE
Projects Director, Deputy Regional Director, Staff AssistantQuantinuum LLC
Report period 2026 Q3 ↗
Posted Oct 19, 2026 · in 4 filings
Alexander LargeHouse Committee on Veterans' Affairs
Committee
Director of Coalitions and Professional Staff MemberGuidepoststrategies, LLC
Report period 2026 Q3 ↗
Posted Oct 17, 2026 · in 5 filings
Michael BainU.S. Senate Committee on Appropriations
Committee
Staff AssistantXLA Advisors, LLC
Report period 2026 Q3 ↗
Posted Oct 17, 2026 · in 4 filings

Each row reflects what was disclosed at the time of filing. A lobbyist listed may no longer be registered.

Part of themes

Themes on 13F.ai that include QNT, and why.

A theme lists companies with something in common under a published rule. It is not a recommendation.

Institutional ownership over time

How many funds reported holding the stock at the end of each quarter, and how many shares they held between them.

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More filings and data

Each opens the table.

About the company

The basics from the company’s SEC registration.

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$35.40−$2.06 (−5.50%) Nov 13 close
Oct 13, 2026: $36.76Oct 14, 2026: $33.03Oct 15, 2026: $36.68Oct 16, 2026: $36.55Oct 19, 2026: $34.93Oct 20, 2026: $35.68Oct 21, 2026: $38.65Oct 22, 2026: $35.90Oct 23, 2026: $36.50Oct 26, 2026: $37.53Oct 27, 2026: $40.21Oct 28, 2026: $38.33Oct 29, 2026: $37.50Oct 30, 2026: $33.60Nov 2, 2026: $30.95Nov 3, 2026: $32.57Nov 4, 2026: $32.75Nov 5, 2026: $29.82Nov 6, 2026: $37.57Nov 9, 2026: $40.04Nov 10, 2026: $43.00Nov 11, 2026: $40.57Nov 12, 2026: $37.46Nov 13, 2026: $35.40
Oct 13, 2026Low $29.82 · High $43.00Nov 13, 2026
Aug 13, 2026: $68.50Aug 14, 2026: $63.59Aug 17, 2026: $66.01Aug 18, 2026: $59.50Aug 19, 2026: $56.00Aug 20, 2026: $54.90Aug 21, 2026: $56.60Aug 24, 2026: $52.07Aug 25, 2026: $53.89Aug 26, 2026: $53.29Aug 27, 2026: $54.00Aug 28, 2026: $49.92Aug 31, 2026: $50.10Sep 1, 2026: $47.66Sep 2, 2026: $48.00Sep 3, 2026: $48.70Sep 4, 2026: $49.65Sep 8, 2026: $50.47Sep 9, 2026: $48.89Sep 10, 2026: $48.67Sep 11, 2026: $49.03Sep 14, 2026: $49.10Sep 15, 2026: $48.65Sep 16, 2026: $52.01Sep 17, 2026: $54.50Sep 18, 2026: $51.58Sep 21, 2026: $51.15Sep 22, 2026: $51.39Sep 23, 2026: $50.11Sep 24, 2026: $49.39Sep 25, 2026: $49.53Sep 28, 2026: $49.11Sep 29, 2026: $48.73Sep 30, 2026: $48.06Oct 1, 2026: $46.68Oct 2, 2026: $46.08Oct 5, 2026: $45.53Oct 6, 2026: $45.59Oct 7, 2026: $44.22Oct 8, 2026: $41.52Oct 9, 2026: $41.30Oct 12, 2026: $39.52Oct 13, 2026: $36.76Oct 14, 2026: $33.03Oct 15, 2026: $36.68Oct 16, 2026: $36.55Oct 19, 2026: $34.93Oct 20, 2026: $35.68Oct 21, 2026: $38.65Oct 22, 2026: $35.90Oct 23, 2026: $36.50Oct 26, 2026: $37.53Oct 27, 2026: $40.21Oct 28, 2026: $38.33Oct 29, 2026: $37.50Oct 30, 2026: $33.60Nov 2, 2026: $30.95Nov 3, 2026: $32.57Nov 4, 2026: $32.75Nov 5, 2026: $29.82Nov 6, 2026: $37.57Nov 9, 2026: $40.04Nov 10, 2026: $43.00Nov 11, 2026: $40.57Nov 12, 2026: $37.46Nov 13, 2026: $35.40
Aug 13, 2026Low $29.82 · High $68.50Nov 13, 2026
Jun 4, 2026: $60.38Jun 5, 2026: $56.26Jun 8, 2026: $58.40Jun 9, 2026: $54.94Jun 10, 2026: $51.40Jun 11, 2026: $56.49Jun 12, 2026: $55.26Jun 15, 2026: $57.91Jun 16, 2026: $55.43Jun 17, 2026: $62.75Jun 18, 2026: $69.80Jun 22, 2026: $68.27Jun 23, 2026: $77.46Jun 24, 2026: $71.10Jun 25, 2026: $71.68Jun 26, 2026: $75.57Jun 29, 2026: $72.84Jun 30, 2026: $81.74Jul 1, 2026: $78.41Jul 2, 2026: $74.56Jul 6, 2026: $83.17Jul 7, 2026: $77.60Jul 8, 2026: $75.61Jul 9, 2026: $73.51Jul 10, 2026: $70.45Jul 13, 2026: $64.09Jul 14, 2026: $66.63Jul 15, 2026: $60.51Jul 16, 2026: $56.52Jul 17, 2026: $56.07Jul 20, 2026: $57.35Jul 21, 2026: $58.58Jul 22, 2026: $54.88Jul 23, 2026: $56.46Jul 24, 2026: $52.29Jul 27, 2026: $52.83Jul 28, 2026: $49.78Jul 29, 2026: $47.34Jul 30, 2026: $51.55Jul 31, 2026: $51.41Aug 3, 2026: $55.65Aug 4, 2026: $58.14Aug 5, 2026: $56.91Aug 6, 2026: $58.88Aug 7, 2026: $58.71Aug 10, 2026: $56.59Aug 11, 2026: $56.06Aug 12, 2026: $71.74Aug 13, 2026: $68.50Aug 14, 2026: $63.59Aug 17, 2026: $66.01Aug 18, 2026: $59.50Aug 19, 2026: $56.00Aug 20, 2026: $54.90Aug 21, 2026: $56.60Aug 24, 2026: $52.07Aug 25, 2026: $53.89Aug 26, 2026: $53.29Aug 27, 2026: $54.00Aug 28, 2026: $49.92Aug 31, 2026: $50.10Sep 1, 2026: $47.66Sep 2, 2026: $48.00Sep 3, 2026: $48.70Sep 4, 2026: $49.65Sep 8, 2026: $50.47Sep 9, 2026: $48.89Sep 10, 2026: $48.67Sep 11, 2026: $49.03Sep 14, 2026: $49.10Sep 15, 2026: $48.65Sep 16, 2026: $52.01Sep 17, 2026: $54.50Sep 18, 2026: $51.58Sep 21, 2026: $51.15Sep 22, 2026: $51.39Sep 23, 2026: $50.11Sep 24, 2026: $49.39Sep 25, 2026: $49.53Sep 28, 2026: $49.11Sep 29, 2026: $48.73Sep 30, 2026: $48.06Oct 1, 2026: $46.68Oct 2, 2026: $46.08Oct 5, 2026: $45.53Oct 6, 2026: $45.59Oct 7, 2026: $44.22Oct 8, 2026: $41.52Oct 9, 2026: $41.30Oct 12, 2026: $39.52Oct 13, 2026: $36.76Oct 14, 2026: $33.03Oct 15, 2026: $36.68Oct 16, 2026: $36.55Oct 19, 2026: $34.93Oct 20, 2026: $35.68Oct 21, 2026: $38.65Oct 22, 2026: $35.90Oct 23, 2026: $36.50Oct 26, 2026: $37.53Oct 27, 2026: $40.21Oct 28, 2026: $38.33Oct 29, 2026: $37.50Oct 30, 2026: $33.60Nov 2, 2026: $30.95Nov 3, 2026: $32.57Nov 4, 2026: $32.75Nov 5, 2026: $29.82Nov 6, 2026: $37.57Nov 9, 2026: $40.04Nov 10, 2026: $43.00Nov 11, 2026: $40.57Nov 12, 2026: $37.46Nov 13, 2026: $35.40
Jun 4, 2026Low $29.82 · High $83.17Nov 13, 2026
Congress purchase Congress sale Insider sale over $1M

Adjusted for stock splits; not for dividends. Where prices come from.

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