As of November 6, 2026, Quantinuum Inc. is a publicly traded company (Nasdaq: QNT). Honeywell International Inc. reports holding 79.1%, a majority of its shares. No bankruptcy or receivership appears in its SEC Form 8-K filings. Founder or officer holdings: Ilyas Khan, a 10% owner (72%, reporting on Schedule 13G) (Schedule 13G, August 13, 2026).
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Is Quantinuum Inc. a real, registered company?
- Quantinuum Inc. files with the SEC under CIK 2110105 (its SEC filings).
- Its shares are listed under the ticker QNT on Nasdaq (SEC company record).
- Incorporated in Delaware; business address in Broomfield, Colorado, as its SEC filings state.
- Court and bankruptcy records: see Before you sign or pay below.
Before you sign or pay
- Court and bankruptcy: No federal court case or bankruptcy filing found under QUANTINUUM INC in our court records and SEC 8-K records (as of 2026-11-06).
- Ownership: 5%+ holders are reported on Schedule 13D or 13G; the latest names Kenneth Griffin (filed 2026-10-06).
Who are Quantinuum Inc.'s owners and officers?
Quantinuum Inc.: incorporated in Delaware; business address in Broomfield, Colorado; industry Services-Computer Integrated Systems Design (Schedule 13G/A, 2026-10-27).
| Report | Holder | Share |
|---|---|---|
| Schedule 13G/A, 2026-10-27 | Blackrock Portfolio Management LLC | 4.5% |
| Schedule 13G, 2026-10-06 | Kenneth Griffin | 7.3% |
| Schedule 13G, 2026-08-13 | Honeywell International Inc. | 79.1% |
| Schedule 13G, 2026-08-12 | Capital Research Global Investors | 5.3% |
| Schedule 13G, 2026-07-17 | Blackrock Portfolio Management LLC | 6.9% |
| Schedule 13G, 2026-07-06 | Capital World Investors | 13.9% |
| Schedule 13G, 2026-06-22 | Ilyas Khan | 72% |
Questions about who owns Quantinuum Inc.
Who owns Quantinuum Inc.?
On this page, 5 holders' latest ownership filings report 5% or more of Quantinuum Inc.: Honeywell International Inc. (79.1%, Schedule 13G, filed 2026-08-13), Ilyas Khan (72%, Schedule 13G, filed 2026-06-22), Capital World Investors (13.9%, Schedule 13G, filed 2026-07-06), Kenneth Griffin (7.3%, Schedule 13G, filed 2026-10-06) and Capital Research Global Investors (5.3%, Schedule 13G, filed 2026-08-12).
Who are the largest shareholders of Quantinuum Inc.?
By the share each holder's latest filing reports, the largest holders of Quantinuum Inc. on this page are Honeywell International Inc. (79.1%), Ilyas Khan (72%) and Capital World Investors (13.9%).
When did Honeywell International Inc. buy into Quantinuum Inc.?
The filings give report dates, not purchase dates. The earliest filing from Honeywell International Inc. on this page is the Schedule 13G, filed 2026-08-13, reporting 79.1%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 7 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
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Which insiders own Quantinuum Inc. shares?
Directors, officers and holders of 10% or more report their shares on Forms 3, 4 and 5. Each line is the latest such report, largest holding first.
- Honeywell International Inc., a 10% owner: 124,628,729 shares, held indirectly (the form names the holder only in its footnotes), on a joint filing (Form 3, 2026-06-04).
- Honeywell Holdings International Inc., a 10% owner: 124,628,729 shares, held indirectly (the form names the holder only in its footnotes), on a joint filing (Form 3, 2026-06-04).
- , a 10% owner: 82,911,824 shares, 27,001 held directly and 82,884,823 indirectly, on a joint filing (Form 3, 2026-06-04).
- CQ Invest I LLC, a 10% owner: 82,911,824 shares, 27,001 held directly and 82,884,823 indirectly, on a joint filing (Form 3, 2026-06-04).
- Cambridge Quantum Holdings Ltd, a 10% owner: 82,911,824 shares, 27,001 held directly and 82,884,823 indirectly, on a joint filing (Form 3, 2026-06-04).
Shares only: the company's cover page does not give one share count for a single class, so no percentage is worked out.
How much has Quantinuum Inc. raised?
Latest IPO step: Quantinuum Inc. filed its final IPO prospectus, ticker QNT (424B4, 2026-06-05).
IPO filings: 424B4, 2026-06-05, S-1/A, 2026-06-01, S-1/A, 2026-05-26, S-1, 2026-05-08; ticker QNT on Nasdaq Global Market.
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More on Quantinuum Inc. and the records around it.
Quantinuum Inc. elsewhere on the record
- 5%+ stake filings Oct 2026
Companies that share a holder
- Citadel Advisors LLC also filed stake reports on 58 other companies: REALLOYS INC. (Oct 2026), STARFIGHTERS SPACE, INC. (Oct 2026), Boundless Bio, Inc. (Aug 2026)
- Capital Research Global Investors also filed stake reports on 99 other companies: Royal Caribbean Cruises Ltd. (Oct 2026), Patria Investments Ltd. (Sep 2026), Arxis, Inc. (Aug 2026)
- BlackRock Portfolio Management LLC also filed stake reports on 118 other companies: AMERISAFE INC (Nov 2026), BlackRock ETF Trust (Nov 2026), iShares J.P. Morgan EM Local Currency Bond ETF (Nov 2026)
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