Arqit Quantum Inc. (ARQQ)
Nasdaq: ARQQ · Services-Prepackaged Software · London, GB · filing with the SEC since 2021
Who owns Arqit Quantum Inc.
As filed with the SECHolders of 5% or more
3
Manfredi Lefebvre d'Ovidio holds 38.6% of Ordinary Shares, par value $0.0025 per share, as its SCHEDULE 13D/A filed May 26, 2026 says.
Directors and officers
13
report now, of 13 people on the record since 2026. Their holdings as a group are not read here.
Institutions as a whole
n/a
The record does not read the share held by managers that file Form 13F, so none is printed and no split of the rest is estimated. What it holds is the 3 named at left.
Holders of 5% or moreshare of the class, as filed
Manfredi Lefebvre d'Ovidio
SCHEDULE 13D/A · filed May 26, 2026 · Ordinary Shares, par value $0.0025 per share · 41.8% in Nov 12, 2025
Notion Capital III LP
SCHEDULE 13G/A · filed Sep 10, 2026 · Ordinary Shares
Williams David John
SCHEDULE 13D/A · filed Dec 18, 2024 · ORDINARY SHARES
The Evolution Technology Fund II SCSP
SCHEDULE 13D/A · filed Feb 10, 2025 · Ordinary Shares, par value $0.0025 per share · reported falling below 5%
Millennium Management LLC
SCHEDULE 13G · filed Jun 23, 2026 · Ordinary Shares, par value $0.0025 per share · reported falling below 5%
What ARQQ reports owning in othersstakes of 5% or more, and other ties
3 subsidiaries in 2 countries, from the list filed with the 20-F filed Dec 9, 2025.
Insider tradesForm 4
43sales
0purchases
0sales on a scheduled plan
9people selling
$2.9Msold, in dollars
$0bought, in dollars
Open-market trades on Form 4 from Nov 6, 2025 to Nov 6, 2026. A scheduled plan is a selling program set in advance under SEC rule 10b5-1. The trades are listed as filed and do not feed the grade.
By calendar yearSoldBought
2026 runs to Nov 6, 2026. Dollars as filed, summed by the transaction date.
People who traded in the window9 of 13 on the roster
| Person | Role as filed | Sales | Sold | On a plan | Buys | Bought |
|---|---|---|---|---|---|---|
| Lefebvre D'Ovidio Manfredi | director | 2 | $1.6M | 0 | 0 | $0 |
| Leaver Andrew | Chief Executive Officer | 6 | $600,000 | 0 | 0 | $0 |
| Bers Jennifer | Chief Revenue Officer | 1 | $200,000 | 0 | 0 | $0 |
| Willcocks Patrick | General Counsel | 8 | $200,000 | 0 | 0 | $0 |
| Feenan Paul | Chief Revenue Officer | 7 | $100,000 | 0 | 0 | $0 |
| Pointon Nicholas | Chief Financial Officer | 2 | $0 | 0 | 0 | $0 |
| Wilder Ben Simon | Chief Operating Officer | 6 | $0 | 0 | 0 | $0 |
| Nilan Nicholas William | General Manager-US | 3 | $0 | 0 | 0 | $0 |
| Ritchie Garth | director | 8 | $0 | 0 | 0 | $0 |