Quantinuum (QNT): which funds own it
A 13F shows the portfolio at quarter-end and is filed up to 45 days later: these are not real-time positions and they may have changed.
Sections with a free account
5 concentrated managers hold it (+5 vs last quarter) with a median weight of 0.3%. 11 officers or directors bought in 6 months.
Who owns Quantinuum?
Holders that filed a Schedule 13D or 13G with the SEC for owning more than 5% of the shares: Honeywell International (13G filed Aug 13, 2026), Ilyas Khan (13G filed Jun 22, 2026), Capital World Investors (13G filed Jul 6, 2026), Citadel Advisors (13G filed Oct 6, 2026) and Capital Research Global Investors (13G filed Aug 12, 2026). As of Jun 30, 2026, the largest holders reported on Form 13F were Capital World Investors (4.6 million shares), Citadel Advisors (2.3 million shares) and BlackRock (2.3 million shares).
Which institutions hold the most Quantinuum shares?
Per Form 13F filings as of Jun 30, 2026:
- 1. Capital World Investors: 4.6 million shares
- 2. Citadel Advisors: 2.3 million shares
- 3. BlackRock: 2.3 million shares
- 4. Capital Research Global Investors: 1.8 million shares
- 5. Defiance ETFs: 1.2 million shares
- 6. Penserra Capital Management: 1.2 million shares
- 7. Wellington Management Group LLP: 1.1 million shares
- 8. Vanguard Portfolio Management: 1.0 million shares
- 9. Capital International Investors: 961,428 shares
- 10. Vanguard Capital Management: 949,283 shares
Sources:13G by Honeywell International (Aug 13, 2026) ↗13G by Ilyas Khan (Jun 22, 2026) ↗13G by Capital World Investors (Jul 6, 2026) ↗13G by Citadel Advisors (Oct 6, 2026) ↗13G by Capital Research Global Investors (Aug 12, 2026) ↗All of the company's proxy statements on EDGAR ↗
We hold 13D and 13G filings made since Dec 23, 2024: a holder above 5% that has not filed since then does not appear here.
Well-known investors holding it
Quarter flow (concentrated managers)
Change in managers (0 → 5): 5 opened · 0 exited = +5
Net flow in the quarter: +$67.6M (+827 K shares) · bought $67.6M and sold $0Shares concentrated managers added minus those they cut, valued at the 13F quarter-end implied price, not each trade's price. It is a different measure from the change in managers: the two can have opposite signs.
Concentrated managers holding it
- Shannon River Fund ManagementNewly listed$38.4M3.4%+3.4 pp
- D1 Capital PartnersNewly listed$24.5M0.1%+0.1 pp
- Light Street Capital ManagementNewly listed$2.9M0.3%+0.3 pp
- WIM Investment ManagementNewly listed$1.6M0.5%+0.5 pp
- Finance DncaNewly listed$204K0.0%+0.0 pp
Up to 15, sorted by position value. The percentage is the weight in each manager's portfolio.
Largest holders of QNT (all 13F filers)
- Capital World Investors4.6 MInvestment firm+4.6 M
- Citadel Advisors2.3 MQuant or multi-manager+2.3 M
- BlackRock2.3 MIndex manager+2.3 M
- Capital Research Global Investors1.8 MInvestment firm+1.8 M
- Defiance ETFs1.2 MType not verified+1.2 M
- Penserra Capital Management1.2 MType not verified+1.2 M
- Wellington Management Group LLP1.1 MInvestment firm+1.1 M
- Vanguard Portfolio Management1.0 MIndex manager+1.0 M
- Capital International Investors961 KInvestment firm+961 K
- Vanguard Capital Management949 KIndex manager+949 K
- Shares
- 4.6 M
- Change
- +4.6 M
See more
- Type
- Investment firm
- Value
- $373M
- Shares
- 2.3 M
- Change
- +2.3 M
See more
- Type
- Quant or multi-manager
- Value
- $188M
- Shares
- 2.3 M
- Change
- +2.3 M
See more
- Type
- Index manager
- Value
- $185M
- Shares
- 1.8 M
- Change
- +1.8 M
See more
- Type
- Investment firm
- Value
- $143M
- Shares
- 1.2 M
- Change
- +1.2 M
See more
- Type
- Type not verified
- Value
- $95.3M
- Shares
- 1.2 M
- Change
- +1.2 M
See more
- Type
- Type not verified
- Value
- $98.1M
- Shares
- 1.1 M
- Change
- +1.1 M
See more
- Type
- Investment firm
- Value
- $92.4M
- Shares
- 1.0 M
- Change
- +1.0 M
See more
- Type
- Index manager
- Value
- $84.1M
- Shares
- 961 K
- Change
- +961 K
See more
- Type
- Investment firm
- Value
- $78.6M
- Shares
- 949 K
- Change
- +949 K
See more
- Type
- Index manager
- Value
- $77.6M
The 10 13F filers with the most shares as of Jun 30, 2026, whatever their type (index firms usually come first). “Change”: shares added or cut versus the previous quarter, split-adjusted; “no data” = there is no comparable portfolio for the previous quarter (no filing, or a filing with its holdings under confidential treatment). “% of the company” only where shares outstanding are up to date. Entities of the same group file separately and some 13F filings include other managers: there may be double counting. With a free account: the top 25, the largest buyers and the largest sellers.
Fundamentals
Balance sheet only, for now. QNT has not yet filed its first annual report (10-K) with the SEC, so there are no 12-month figures (revenue, margins, earnings and cash flow). We show the balance sheet from its latest filing; once the 12-month figures are available, this section fills in automatically.
- Cash and equivalents
- $2.1 bn
- Shareholders' equity
- $413M
Balance sheet figures the company filed with the SEC (10-Q or 10-K), in dollars. Net debt = total debt − cash − investments; when negative, the company has more cash than debt (net cash). How each figure is calculated
Insiders (Form 4)
10% owners who bought (6 m): 0
Open-market purchases, excluding 10b5-1 plans. Officers and directors only; joint filers of the same purchase count as one. 10% owners with no role are shown separately. 0 = nobody bought; “no data” = we do not have its Form 4 filings.
Each of the company's Form 4 filings, on EDGAR ↗Latest trades, with date and filing →
Above 5% (13D/13G)
Disclosed stakes, with their amendments. A filing is not always a purchase: there are also reductions and changes of filing entity.
This list may be incomplete: we hold 13D and 13G filings made since Dec 23, 2024. A holder above 5% that has not filed anything since then is not shown here.
- BlackRock Portfolio Management4.5%(fell below 5%)13G · amendmentfiling ↗Event: Sep 30, 2026 · filed: Oct 27, 2026
- Citadel Advisors7.3%13Gfiling ↗Event: Jun 30, 2026 · filed: Oct 6, 2026
- Honeywell International79.1%13Gfiling ↗Event: Jun 30, 2026 · filed: Aug 13, 2026
Above 5% over time (13D/13G)
Each holder with its filings in order. History since December 2024.
Flagged material events (8-K)
Unregistered sale of equity securities (Item 3.02)
Alert items the company itself flagged in its 8-K filings with the SEC, most serious first. It is the form's label, with no interpretation from us: Item 5.02 covers routine appointments as well as a chief executive's departure; open the filing. The quoted headline is the original press release's.
All material events (8-K)
Earnings, agreements, financing, management changes and announcements from the last year, with a filter by type and a link to each filing.
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