Comparable stake leader
Cambridge Quantum Holdings Ltd
SEC ownership of Quantinuum Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0002110105.
Disclosed value leader
Capital World Investors
Comparable rows
2/20
Latest evidence
30 Jun 2026
- Public ticker
- QNT on Nasdaq
- Parsed ownership sources
-
3/4/5 and 13D/G
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Cambridge Quantum Holdings Ltd
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
2 of 20
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Cambridge Quantum Holdings Ltd
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
30 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0002110105
- Issuer location
- Broomfield, CO
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of Quantinuum Inc. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Cambridge Quantum Holding...
Disclosed value leader
Capital World Investors
Comparable rows
2/20
Latest evidence
30 Jun 2026
3/4/5
13D/G
Lead comparable stake: 72%
18 rows are not safely comparable across share classes.
13D/G row: Cambridge Quantum Holdings Ltd
Showing 1-8 of 20 holder rows.
Quick read
Cambridge Quantum Holdings Ltd leads the comparable SEC ownership view at 72%.
2 of 20 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Cambridge Quantum Holdings Ltd's linked filing trail.
Comparable ownership
Top 2
Cambridge Quantum Holdings Ltd
72%
Capital World Investors
14%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 20 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Cambridge Quantum Holdings Ltd |
3/4/5
13D/G
10%+ Owner · Ilyas Khan
|
72%
from 13D/G
|
—
82,911,824 shares
mixed-class rows
|
— | 04 Jun 2026 |
| Capital World Investors |
13D/G
|
14%
|
$257,536,554
4,558,976 shares
|
$0 | 30 Jun 2026 |
| Honeywell Holdings International Inc. |
3/4/5
10%+ Owner
|
—
class O/S missing
|
—
124,628,729 shares
|
— | 04 Jun 2026 |
| HONEYWELL INTERNATIONAL INC |
3/4/5
10%+ Owner
|
—
class O/S missing
|
—
124,628,729 shares
|
— | 04 Jun 2026 |
| CQ Invest I LLC |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
—
82,911,824 shares
mixed-class rows
|
— | 04 Jun 2026 |
| Ilyas Khan |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
—
82,911,824 shares
mixed-class rows
|
— | 04 Jun 2026 |
| Waseem Shiraz |
3/4/5
10%+ Owner
|
—
mixed-class rows
|
—
82,911,824 shares
mixed-class rows
|
— | 04 Jun 2026 |
| Rajeeb Hazra |
3/4/5
President & CEO, Director
|
—
mixed-class rows
|
—
907,296 shares
mixed-class rows
|
— | 04 Jun 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 15 Jul 2025.
Buys
$0
Insiders: 0
Sells
$0
Insiders: 0
Net
$0
Shares: 0
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 0
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 0 | $0 | $0 | $0 |
| 3-6 | 0 | 0 | $0 | $0 | $0 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-19 of 19 reporting-owner rows connected to Quantinuum Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
19
Largest Forms 3/4/5 holder
Manish H. Bhatia
Net 12M change
$0
Latest report
05 Jun 2026
Recent insider transactions for Quantinuum Inc.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Prineha Narang | QNT | Class A Common Stock | Purchase | 3.43% | 200 | 6,033 | 05 Jun 2026 | Direct | ||
| Joseph Jimenez | QNT | Class A Common Stock | Purchase | 1142.9% | 66,665 | 72,498 | 05 Jun 2026 | Direct | ||
| Nitesh Sharan | QNT | Class A Common Stock | Purchase | 1.94% | 6,500 | 340,846 | 05 Jun 2026 | Direct | ||
| Hal Barron | QNT | Class A Common Stock | Purchase | 4286% | 250,000 | 255,833 | 05 Jun 2026 | Direct | ||
| Eric Branderiz | QNT | Class A Common Stock | Purchase | 142.9% | 8,334 | 14,167 | 05 Jun 2026 | Direct | ||
| Vimal Kapur | QNT | Class A Common Stock | Purchase | 13,000 | 13,000 | 05 Jun 2026 | Direct | |||
| Michal Stepniak | QNT | Class A Common Stock | Purchase | 13,333 | 13,333 | 05 Jun 2026 | Direct | |||
| Kevin Scott Dehoff | QNT | Class A Common Stock | Purchase | 13.5% | 15,000 | 126,460 | 05 Jun 2026 | Direct | ||
| Paul R. Daugherty | QNT | Class A Common Stock | Purchase | 68.6% | 4,000 | 9,833 | 05 Jun 2026 | Direct | ||
| Kenneth D. Denman | QNT | Class A Common Stock | Purchase | 240% | 14,000 | 19,833 | 05 Jun 2026 | Direct | ||
| Manish H. Bhatia | QNT | Class A Common Stock | Purchase | 342.9% | 20,000 | 25,833 | 05 Jun 2026 | Direct | ||
| Prineha Narang | QNT | Class A Common Stock | Award | 5,833 | 5,833 | 04 Jun 2026 | Direct | |||
| Joseph Jimenez | QNT | Class A Common Stock | Award | 5,833 | 5,833 | 04 Jun 2026 | Direct | |||
| Nitesh Sharan | QNT | Class A Common Stock | Award | 15.4% | 44,548 | 334,346 | 04 Jun 2026 | Direct | ||
| Hal Barron | QNT | Class A Common Stock | Award | 5,833 | 5,833 | 04 Jun 2026 | Direct | |||
| Eric Branderiz | QNT | Class A Common Stock | Award | 5,833 | 5,833 | 04 Jun 2026 | Direct | |||
| Paul R. Daugherty | QNT | Class A Common Stock | Award | 5,833 | 5,833 | 04 Jun 2026 | Direct | |||
| Kenneth D. Denman | QNT | Class A Common Stock | Award | 5,833 | 5,833 | 04 Jun 2026 | Direct | |||
| Manish H. Bhatia | QNT | Class A Common Stock | Award | 5,833 | 5,833 | 04 Jun 2026 | Direct | |||
| Rajeeb Hazra | QNT | Class A Common Stock | Award | 11.1% | 78,333 | 784,505 | 04 Jun 2026 | Direct | ||
| Nitesh Sharan | QNT | Class A Common Stock | Award | 289,798 | 289,798 | 03 Jun 2026 | Direct | |||
| Kevin Scott Dehoff | QNT | Class A Common Stock | Award | 111,460 | 111,460 | 03 Jun 2026 | Direct | |||
| Rajeeb Hazra | QNT | Class A Common Stock | Tax liability | -32.3% | -336,389 | 706,172 | 03 Jun 2026 | Direct | ||
| Rajeeb Hazra | QNT | Class A Common Stock | Award | 1,042,561 | 1,042,561 | 03 Jun 2026 | Direct | |||
| Rajeeb Hazra | QNT | Stock Option | Award | 122,791 | 122,791 | 03 Jun 2026 | Direct |
* marks a reported price that did not pass the local price check.