Comparable stake leader
d'Ovidio Manfredi Lefebvre
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
—
Comparable rows
0/1
Latest evidence
30 Apr 2026
- Public ticker
- ARQQ, ARQQW on Nasdaq
- Parsed ownership sources
-
3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
d'Ovidio Manfredi Lefebvre
Ranking: Comparable ownership first, then disclosed value
- Latest parsed ownership date
-
30 Apr 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.
1 signal
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
d'Ovidio Manfredi Lefebvre
Disclosed value leader
—
Comparable rows
0/1
Latest evidence
30 Apr 2026
3/4/5
Some rows are evidence-backed but not safely comparable across classes.
1 rows are not safely comparable across share classes.
Quick read
SEC ownership evidence is available, but the rows are not safely comparable across share classes.
0 of 1 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 d'Ovidio Manfredi Lefebvre's linked filing trail.
Detailed SEC evidence table Showing 1-1 of 1 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| d'Ovidio Manfredi Lefebvre |
3/4/5
Director
|
—
class O/S missing
|
—
25,741 shares
|
— | 30 Apr 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 23 Aug 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 1-1 of 1 reporting-owner rows connected to Arqit Quantum Inc.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
1
Largest Forms 3/4/5 holder
d'Ovidio Manfredi Lefebvre
Net 12M change
$0
Latest report
30 Apr 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| d'Ovidio Manfredi Lefebvre | Director | Mixed | 30 Apr 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 | -1.54% | -402 | 25,741 | 01 May 2026 | Beneficially owned through Heritage Assets SCSp | ||
| d'Ovidio Manfredi Lefebvre | ARQQ | Business Combination Warrants (right to buy) | Sale | -0.35% | -91 | 26,143 | 30 Apr 2026 | Beneficially owned through Heritage Assets SCSp |
* marks a reported price that did not pass the local price check.