Comparable stake leader
Heritage Assets Scsp
SEC ownership of Arqit Quantum Inc.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001859690.
Disclosed value leader
Heritage Assets Scsp
Comparable rows
50/50
Latest evidence
22 Jun 2026
- Public ticker
- ARQQ, ARQQW on Nasdaq
- Parsed ownership sources
-
13D/G, 3/4/5, and 13F
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
Heritage Assets Scsp
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
Heritage Assets Scsp
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
22 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001859690
- Issuer location
- London, United Kingdom
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 Arqit Quantum 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
Heritage Assets Scsp
Disclosed value leader
Heritage Assets Scsp
Comparable rows
50/50
Latest evidence
22 Jun 2026
13D/G
3/4/5
13F
Lead comparable stake: 39%
13D/G row: Heritage Assets Scsp
Showing 1-8 of 50 holder rows.
Quick read
Heritage Assets Scsp leads the comparable SEC ownership view at 39%.
50 of 50 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 Heritage Assets Scsp's linked filing trail.
Comparable ownership
Top 5
Heritage Assets Scsp
39%
D2BW Ltd
5.8%
Evolution Technology Fund II, SCSP.
3.1%
ICS OPPORTUNITIES, LTD.
0.3%
Jennifer Bers
0.03%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Heritage Assets Scsp |
13D/G
Manfredi Lefebvre d'Ovidio
|
39%
|
$138,079,960
9,298,314 shares
|
+$388,669 | 21 May 2026 |
| D2BW Ltd |
13D/G
Williams David John
|
5.8%
|
$11,990,930
726,723 shares
|
$0 | 11 Dec 2024 |
| Evolution Technology Fund II, SCSP. |
13D/G
The Evolution Technology Fund II SCSP
|
3.1%
|
$6,554,774
397,259 shares
|
$0 | 30 Sep 2024 |
| ICS OPPORTUNITIES, LTD. |
13D/G
Millennium Management LLC
|
0.3%
|
$943,798
58,621 shares
|
$0 | 16 Jun 2026 |
| Jennifer Bers |
3/4/5
Chief Revenue Officer
|
0.03%
|
$143,771
6,712 shares
|
-$177,529 | 22 Jun 2026 |
| Defiance ETFs, LLC |
13F
Company
|
6%
|
$19,243,121
1,452,311 shares
|
— | 31 Mar 2026 |
| Penserra Capital Management LLC |
13F
Company
|
6%
|
$19,243,000
1,452,311 shares
|
— | 31 Mar 2026 |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. |
13F
Company
|
1.3%
|
$4,292,825
324,309 shares
|
— | 31 Mar 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
Net insider flow leans to selling over the last 12 months. Net value: -$2,534,945.
Buys
$0
Insiders: 0
Sells
$2,534,945
Insiders: 8
Net
-$2,534,945
Shares: -108,986
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 108,986
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 95,065 | $0 | $2,348,100 | -$2,348,100 |
| 3-6 | 0 | 13,921 | $0 | $186,846 | -$186,846 |
| 6-9 | 0 | 0 | $0 | $0 | $0 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-13 of 13 reporting-owner rows connected to Arqit Quantum Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
13
Largest Forms 3/4/5 holder
d'Ovidio Manfredi Lefebvre
Net 12M change
-$2,534,946
Latest report
07 Jul 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| d'Ovidio Manfredi Lefebvre | Director | $58,198,781 | -$1,669,120 | -2.8% | Mixed | 07 Jul 2026 |
| Carlo Calabria | Director | $3,070,303 | Mixed | 01 Jul 2026 | ||
| Garth Ritchie | Director | $2,636,418 | -$17,846 | -0.67% | Filing P/S | 01 Jul 2026 |
| Andrew Leaver | Chief Executive Officer | $1,297,505 | -$351,951 | -21% | Filing P/S | 01 Jul 2026 |
| Paul Feenan | Chief Revenue Officer | $487,695 | -$67,960 | -12% | Filing P/S | 01 Jul 2026 |
| Nicholas Pointon | Chief Financial Officer | $257,697 | -$29,667 | -10% | Filing P/S | 20 Apr 2026 |
| Patrick Willcocks | General Counsel | $238,467 | -$192,401 | -45% | Filing P/S | 01 Jul 2026 |
| Jennifer Bers | Chief Revenue Officer | $143,771 | -$177,529 | -55% | Filing P/S | 22 Jun 2026 |
| Ben Simon Wilder | Chief Operating Officer | $90,287 | -$28,472 | -24% | Filing P/S | 01 Jul 2026 |
| Nicholas William Nilan | General Manager-US | Mixed | 18 Mar 2026 | |||
| Cristina Levis | Director | Mixed | 01 May 2026 | |||
| Robert Michael Russell | Chief Financial Officer | Mixed | 01 Jun 2026 | |||
| Stephen Charles Chandler | Director | Mixed | 18 Mar 2026 |
Recent insider transactions for Arqit Quantum 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 |
|---|---|---|---|---|---|---|---|---|---|---|
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -0.75% | -110 | 14,509 | 08 Jul 2026 | Beneficially owned through Heritage Assets SCSp | ||
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -0.27% | -40 | 14,619 | 07 Jul 2026 | Beneficially owned through Heritage Assets SCSp | ||
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -0.66% | -97 | 14,659 | 06 Jul 2026 | Beneficially owned through Heritage Assets SCSp | ||
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -0.24% | -36 | 14,756 | 02 Jul 2026 | Beneficially owned through Heritage Assets SCSp | ||
| Patrick Willcocks | ARQQ | Ordinary Shares | Sale | -17.5% | $50,632 | $25.20 | -2,009 | 9,462 | 02 Jul 2026 | Direct |
| Garth Ritchie | ARQQ | Ordinary Shares | Sale | -0.42% | $11,064 | $25.20 | -439 | 104,609 | 02 Jul 2026 | Direct |
| Andrew Leaver | ARQQ | Ordinary Shares | Sale | -16.1% | $249,329 | $25.20 | -9,893 | 51,483 | 02 Jul 2026 | Direct |
| Ben Simon Wilder | ARQQ | Ordinary Shares | Sale | -17.7% | $19,381 | $25.20 | -769 | 3,582 | 02 Jul 2026 | Direct |
| Paul Feenan | ARQQ | Ordinary Shares | Sale | -8.66% | $46,222 | $25.20 | -1,834 | 19,351 | 02 Jul 2026 | Direct |
| d'Ovidio Manfredi Lefebvre | ARQQ | Ordinary Shares | Options Exercise | 9.35% | 4,133 | 48,350 | 01 Jul 2026 | Direct | ||
| d'Ovidio Manfredi Lefebvre | ARQQ | Restricted Share Units | Options Exercise | -100% | -4,133 | 0 | 01 Jul 2026 | Direct | ||
| Carlo Calabria | ARQQ | Ordinary Shares | Options Exercise | 0.35% | 799 | 231,721 | 01 Jul 2026 | Direct | ||
| Carlo Calabria | ARQQ | Restricted Share Units | Options Exercise | -100% | -799 | 0 | 01 Jul 2026 | Direct | ||
| Patrick Willcocks | ARQQ | Ordinary Shares | Options Exercise | 44.9% | 3,555 | 11,471 | 01 Jul 2026 | Direct | ||
| Patrick Willcocks | ARQQ | Restricted Share Units | Options Exercise | -100% | -3,555 | 0 | 01 Jul 2026 | Direct | ||
| Garth Ritchie | ARQQ | Ordinary Shares | Options Exercise | 0.77% | 799 | 105,048 | 01 Jul 2026 | Direct | ||
| Garth Ritchie | ARQQ | Restricted Share Units | Options Exercise | -100% | -799 | 0 | 01 Jul 2026 | Direct | ||
| Andrew Leaver | ARQQ | Ordinary Shares | Options Exercise | 34.2% | 15,625 | 61,376 | 01 Jul 2026 | Direct | ||
| Andrew Leaver | ARQQ | Restricted Stock Units | Options Exercise | -7.14% | -15,625 | 203,125 | 01 Jul 2026 | Direct | ||
| Ben Simon Wilder | ARQQ | Ordinary Shares | Options Exercise | 44.2% | 1,333 | 4,351 | 01 Jul 2026 | Direct | ||
| Ben Simon Wilder | ARQQ | Restricted Share Units | Options Exercise | -24.2% | -1,333 | 4,165 | 01 Jul 2026 | Direct | ||
| Paul Feenan | ARQQ | Ordinary Shares | Options Exercise | 17.9% | 3,222 | 21,185 | 01 Jul 2026 | Direct | ||
| Paul Feenan | ARQQ | Restricted Stock Units | Options Exercise | -100% | -3,222 | 0 | 01 Jul 2026 | Direct | ||
| d'Ovidio Manfredi Lefebvre | ARQQ | Ordinary Shares | Sale | -0.74% | $980,441 | $30.24 | -32,422 | 4,342,448 | 01 Jul 2026 | Beneficially owned through Heritage Assets SCSp |
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -0.28% | $57.4 | $1.40 | -41 | 14,792 | 01 Jul 2026 | Beneficially owned through Heritage Assets SCSp |
| d'Ovidio Manfredi Lefebvre | ARQQ | Ordinary Shares | Sale | -0.5% | $662,202 | $30.07 | -22,022 | 4,374,870 | 30 Jun 2026 | Beneficially owned through Heritage Assets SCSp |
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -1.02% | $246 | $1.60 | -154 | 14,987 | 30 Jun 2026 | Beneficially owned through Heritage Assets SCSp |
| Patrick Willcocks | ARQQ | Ordinary Shares | Sale | -33.6% | $117,920 | $29.48 | -4,000 | 7,916 | 30 Jun 2026 | Direct |
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -0.75% | $170 | $1.50 | -113 | 14,987 | 29 Jun 2026 | Beneficially owned through Heritage Assets SCSp |
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -2.06% | -317 | 15,099 | 26 Jun 2026 | Beneficially owned through Heritage Assets SCSp | ||
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -2.87% | -455 | 15,416 | 25 Jun 2026 | Beneficially owned through Heritage Assets SCSp | ||
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -3.99% | -659 | 15,871 | 24 Jun 2026 | Beneficially owned through Heritage Assets SCSp | ||
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -2.89% | $886 | $1.80 | -492 | 16,530 | 23 Jun 2026 | Beneficially owned through Heritage Assets SCSp |
| Jennifer Bers | ARQQ | Ordinary Shares | Sale | -55.2% | $177,529 | $21.42 | -8,288 | 6,712 | 22 Jun 2026 | Direct |
| Jennifer Bers | ARQQ | Ordinary Shares | Options Exercise | 15,000 | 15,000 | 22 Jun 2026 | Direct | |||
| Jennifer Bers | ARQQ | Restricted Stock Units | Options Exercise | -100% | -15,000 | 0 | 22 Jun 2026 | Direct | ||
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -0.7% | $168 | $1.40 | -120 | 17,022 | 22 Jun 2026 | Beneficially owned through Heritage Assets SCSp |
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -2.97% | $786 | $1.50 | -524 | 17,142 | 18 Jun 2026 | Beneficially owned through Heritage Assets SCSp |
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -4.74% | $1,320 | $1.50 | -880 | 17,666 | 17 Jun 2026 | Beneficially owned through Heritage Assets SCSp |
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -2.26% | $685 | $1.60 | -428 | 18,546 | 16 Jun 2026 | Beneficially owned through Heritage Assets SCSp |
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -1.84% | $498 | $1.40 | -356 | 18,974 | 15 Jun 2026 | Beneficially owned through Heritage Assets SCSp |
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -3.43% | -687 | 19,330 | 12 Jun 2026 | Beneficially owned through Heritage Assets SCSp | ||
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -4.03% | $1,262 | $1.50 | -841 | 20,017 | 11 Jun 2026 | Beneficially owned through Heritage Assets SCSp |
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -0.3% | $93 | $1.50 | -62 | 20,858 | 10 Jun 2026 | Beneficially owned through Heritage Assets SCSp |
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -0.25% | $72.8 | $1.40 | -52 | 20,920 | 09 Jun 2026 | Beneficially owned through Heritage Assets SCSp |
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -0.09% | $27 | $1.50 | -18 | 20,971 | 08 Jun 2026 | Beneficially owned through Heritage Assets SCSp |
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -0.74% | $218 | $1.40 | -156 | 20,989 | 05 Jun 2026 | Beneficially owned through Heritage Assets SCSp |
| Garth Ritchie | ARQQ | Ordinary Shares | Options Exercise | 239.7% | 73,562 | 104,249 | 05 Jun 2026 | Direct | ||
| Garth Ritchie | ARQQ | Ordinary Share Purchase Warrants (right to buy) | Options Exercise | -100% | -73,562 | 0 | 05 Jun 2026 | Direct | ||
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -0.58% | $186 | $1.50 | -124 | 21,145 | 04 Jun 2026 | Beneficially owned through Heritage Assets SCSp |
* marks a reported price that did not pass the local price check.