Arqit Quantum Inc. (ARQQ)

Data as of Oct 21, 2026, from SEC Form 4 filings.

Net insider selling (90d)Watch ARQQ

See up to 3 months of ARQQ. The 7-day demo opens the 1M and 3M ranges and puts ARQQ on your watchlist.

Latest ARQQ insider trades

Andrew Leaver - Officer
Open-market sale$42K
Oct 13, 2026
Ben Simon Wilder

About Arqit Quantum Inc. (ARQQ)

The SEC lists Arqit Quantum Inc. under CIK 0001859690, in prepackaged software. It is grouped with Information Technology companies on this site.

Sector: Information Technology

SEC filings for ARQQ on EDGAR

ARQQ Form 4 activity by transaction type, last 90 days

Form 4 transaction type	Transactions	Shares	Total value
Open-market sale	13	11,397	$254K
Grant or award	3	2,757
Option exercise	100	58,564

ARQQ insider transactions (Form 4)

125

89 Form 4 filings on record, the earliest from Apr 3, 2026, newest first. Filing history page 1 of 3.

Traded	Insider	Transaction	Security	Shares	Price	Value
Oct 16, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Ordinary Shares	817	$0.00^{footnote F1}	-
Oct 15, 2026	D'Ovidio Manfredi Lefebvre - Director	Grant or award	Restricted Share Units	817	$0.00	-
Oct 16, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Restricted Share Units	817	$0.00	-
Footnote F1 (price): Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested within the week of the grant date.
Oct 16, 2026	Carlo Calabria - Director	Option exercise	Ordinary Shares	919	$0.00^{footnote F1}	-
Oct 15, 2026	Carlo Calabria - Director	Grant or award	Restricted Share Units	919	$0.00	-
Oct 16, 2026	Carlo Calabria - Director	Option exercise	Restricted Share Units	919	$0.00	-
Footnote F1 (price): Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested within the week of the grant date.
Oct 16, 2026	Garth Ritchie - Director	Option exercise	Ordinary Shares	1,021	$0.00^{footnote F1}	-
Oct 15, 2026	Garth Ritchie - Director	Grant or award	Restricted Share Units	1,021	$0.00	-
Oct 16, 2026	Garth Ritchie - Director	Option exercise	Restricted Share Units	1,021	$0.00	-
Footnote F1 (price): Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested within the week of the grant date.
Oct 13, 2026	Andrew Leaver - Officer	Open-market sale	Ordinary Shares	2,573	$16.40	$42K
Oct 12, 2026	Andrew Leaver - Officer	Option exercise	Ordinary Shares	5,209	$0.00^{footnote F1}	-
Oct 12, 2026	Andrew Leaver - Officer	Option exercise	Restricted Share Units	5,209	$0.00	-
Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Oct 6, 2026	Ben Simon Wilder - Officer	Open-market sale	Ordinary Shares	218	$24.19	$5K
Oct 6, 2026	Nicholas William Nilan - Officer	Open-market sale	Ordinary Shares	493	$24.19	$12K
Oct 6, 2026	Garth Ritchie - Director	Open-market sale	Ordinary Shares	118	$24.19	$3K
Oct 6, 2026	Patrick Willcocks - Officer	Open-market sale	Ordinary Shares	555	$24.19	$13K
Oct 6, 2026	Paul Feenan - Officer	Open-market sale	Ordinary Shares	504	$24.19	$12K
Oct 6, 2026	Andrew Leaver - Officer	Open-market sale	Ordinary Shares	2,398	$24.19	$58K
Oct 5, 2026	Andrew Leaver - Officer	Open-market sale	Ordinary Shares	2,535	$23.78	$60K
Oct 5, 2026	Andrew Leaver - Officer	Other	Ordinary Shares	5,209	$0.00^{footnote F2}	-
Oct 5, 2026	Andrew Leaver - Officer	Option exercise	Ordinary Shares	5,208	$0.00^{footnote F2}	-
Oct 5, 2026	Andrew Leaver - Officer	Other	Ordinary Shares	2,818	$24.47^{footnote F3}	$69K
Oct 5, 2026	Andrew Leaver - Officer	Other	Restricted Share Units	5,209	$0.00^{footnote F2}	-
Oct 5, 2026	Andrew Leaver - Officer	Option exercise	Restricted Share Units	5,208	$0.00	-
Footnote F2 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. Footnote F3 (price): The price for acquiring these ordinary shares is the same price that the units were sold for on October 2.
Oct 5, 2026	Carlo Calabria - Director	Option exercise	Ordinary Shares	16	$0.00^{footnote F1}	-
Oct 5, 2026	Carlo Calabria - Director	Option exercise	Ordinary Shares	66	$0.00^{footnote F1}	-
Oct 5, 2026	Carlo Calabria - Director	Option exercise	Ordinary Shares	83	$0.00^{footnote F1}	-
Oct 5, 2026	Carlo Calabria - Director	Option exercise	Ordinary Shares	83	$0.00^{footnote F1}	-
Oct 5, 2026	Carlo Calabria - Director	Option exercise	Restricted Share Units	16	$0.00	-
Oct 5, 2026	Carlo Calabria - Director	Option exercise	Restricted Share Units	66	$0.00	-
Oct 5, 2026	Carlo Calabria - Director	Option exercise	Restricted Share Units	83	$0.00	-
Oct 5, 2026	Carlo Calabria - Director	Option exercise	Restricted Share Units	83	$0.00	-
Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Oct 5, 2026	Paul Feenan - Officer	Option exercise	Ordinary Shares	555	$0.00^{footnote F1}	-
Oct 5, 2026	Paul Feenan - Officer	Option exercise	Ordinary Shares	157	$0.00^{footnote F1}	-
Oct 5, 2026	Paul Feenan - Officer	Option exercise	Ordinary Shares	322	$0.00^{footnote F1}	-
Oct 5, 2026	Paul Feenan - Officer	Open-market sale	Ordinary Shares	533	$23.78	$13K
Oct 5, 2026	Paul Feenan - Officer	Option exercise	Restricted Share Units	555	$0.00	-
Oct 5, 2026	Paul Feenan - Officer	Option exercise	Restricted Share Units	157	$0.00	-
Oct 5, 2026	Paul Feenan - Officer	Option exercise	Restricted Share Units	322	$0.00	-
Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Oct 5, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Ordinary Shares	1,111	$0.00^{footnote F1}	-
Oct 5, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Ordinary Shares	16	$0.00^{footnote F1}	-
Oct 5, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Ordinary Shares	66	$0.00^{footnote F1}	-
Oct 5, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Ordinary Shares	83	$0.00^{footnote F1}	-
Oct 5, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Ordinary Shares	83	$0.00^{footnote F1}	-
Oct 5, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Restricted Share Units	1,111	$0.00	-
Oct 5, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Restricted Share Units	16	$0.00	-
Oct 5, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Restricted Share Units	66	$0.00	-
Oct 5, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Restricted Share Units	83	$0.00	-
Oct 5, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Restricted Share Units	83	$0.00	-
Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Oct 5, 2026	Nicholas William Nilan - Officer	Option exercise	Ordinary Shares	959	$0.00^{footnote F1}	-
Oct 5, 2026	Nicholas William Nilan - Officer	Open-market sale	Ordinary Shares	522	$23.78	$12K
Oct 5, 2026	Nicholas William Nilan - Officer	Option exercise	Restricted Share Units	959	$0.00	-
Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Oct 5, 2026	Garth Ritchie - Director	Option exercise	Ordinary Shares	16	$0.00^{footnote F1}	-
Oct 5, 2026	Garth Ritchie - Director	Option exercise	Ordinary Shares	66	$0.00^{footnote F1}	-
Oct 5, 2026	Garth Ritchie - Director	Option exercise	Ordinary Shares	83	$0.00^{footnote F1}	-
Oct 5, 2026	Garth Ritchie - Director	Option exercise	Ordinary Shares	83	$0.00^{footnote F1}	-
Oct 5, 2026	Garth Ritchie - Director	Open-market sale	Ordinary Shares	127	$23.78	$3K
Oct 5, 2026	Garth Ritchie - Director	Option exercise	Restricted Share Units	16	$0.00	-
Oct 5, 2026	Garth Ritchie - Director	Option exercise	Restricted Share Units	66	$0.00	-
Oct 5, 2026	Garth Ritchie - Director	Option exercise	Restricted Share Units	83	$0.00	-
Oct 5, 2026	Garth Ritchie - Director	Option exercise	Restricted Share Units	83	$0.00	-
Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Oct 5, 2026	Ben Simon Wilder - Officer	Option exercise	Ordinary Shares	277	$0.00^{footnote F1}	-
Oct 5, 2026	Ben Simon Wilder - Officer	Option exercise	Ordinary Shares	166	$0.00^{footnote F1}	-
Oct 5, 2026	Ben Simon Wilder - Officer	Open-market sale	Ordinary Shares	233	$23.78	$6K
Oct 5, 2026	Ben Simon Wilder - Officer	Option exercise	Restricted Share Units	277	$0.00	-
Oct 5, 2026	Ben Simon Wilder - Officer	Option exercise	Restricted Share Units	166	$0.00	-
Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Oct 5, 2026	Patrick Willcocks - Officer	Option exercise	Ordinary Shares	694	$0.00^{footnote F1}	-
Oct 5, 2026	Patrick Willcocks - Officer	Option exercise	Ordinary Shares	149	$0.00^{footnote F1}	-
Oct 5, 2026	Patrick Willcocks - Officer	Option exercise	Ordinary Shares	305	$0.00^{footnote F1}	-
Oct 5, 2026	Patrick Willcocks - Officer	Open-market sale	Ordinary Shares	588	$23.78	$14K
Oct 5, 2026	Patrick Willcocks - Officer	Option exercise	Restricted Share Units	694	$0.00	-
Oct 5, 2026	Patrick Willcocks - Officer	Option exercise	Restricted Share Units	149	$0.00	-
Oct 5, 2026	Patrick Willcocks - Officer	Option exercise	Restricted Share Units	305	$0.00	-
Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Oct 1, 2026	Carlo Calabria - Director	Option exercise	Ordinary Shares	17	$0.00^{footnote F1}	-
Oct 1, 2026	Carlo Calabria - Director	Option exercise	Ordinary Shares	67	$0.00^{footnote F1}	-
Oct 1, 2026	Carlo Calabria - Director	Option exercise	Ordinary Shares	84	$0.00^{footnote F1}	-
Oct 1, 2026	Carlo Calabria - Director	Option exercise	Ordinary Shares	84	$0.00^{footnote F1}	-
Oct 1, 2026	Carlo Calabria - Director	Option exercise	Restricted Share Units	17	-^{footnote F1}	-
Oct 1, 2026	Carlo Calabria - Director	Option exercise	Restricted Share Units	67	-^{footnote F1}	-
Oct 1, 2026	Carlo Calabria - Director	Option exercise	Restricted Share Units	84	-^{footnote F1}	-
Oct 1, 2026	Carlo Calabria - Director	Option exercise	Restricted Share Units	84	-^{footnote F1}	-
Footnote F1 (price): Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Oct 1, 2026	Paul Feenan - Officer	Option exercise	Ordinary Shares	556	$0.00	-
Oct 1, 2026	Paul Feenan - Officer	Option exercise	Ordinary Shares	158	$0.00^{footnote F1}	-
Oct 1, 2026	Paul Feenan - Officer	Option exercise	Ordinary Shares	322	$0.00^{footnote F1}	-
Oct 1, 2026	Paul Feenan - Officer	Option exercise	Restricted Share Units	556	$0.00	-
Oct 1, 2026	Paul Feenan - Officer	Option exercise	Restricted Share Units	158	-^{footnote F1}	-
Oct 1, 2026	Paul Feenan - Officer	Option exercise	Restricted Share Units	322	-^{footnote F1}	-
Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Oct 1, 2026	Andrew Leaver - Officer	Option exercise	Ordinary Shares	5,209	$0.00^{footnote F1}	-
Oct 1, 2026	Andrew Leaver - Officer	Option exercise	Restricted Share Units	5,209	-^{footnote F1}	-
Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Oct 1, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Ordinary Shares	1,112	$0.00^{footnote F1}	-
Oct 1, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Ordinary Shares	17	$0.00^{footnote F1}	-
Oct 1, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Ordinary Shares	67	$0.00^{footnote F1}	-
Oct 1, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Ordinary Shares	84	$0.00^{footnote F1}	-
Oct 1, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Ordinary Shares	84	$0.00^{footnote F1}	-
Oct 1, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Restricted Share Units	1,112	-^{footnote F1}	-
Oct 1, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Restricted Share Units	17	-^{footnote F1}	-
Oct 1, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Restricted Share Units	67	-^{footnote F1}	-
Oct 1, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Restricted Share Units	84	-^{footnote F1}	-
Oct 1, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Restricted Share Units	84	-^{footnote F1}	-
Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Oct 1, 2026	Nicholas William Nilan - Officer	Option exercise	Ordinary Shares	960	$0.00^{footnote F1}	-
Oct 1, 2026	Nicholas William Nilan - Officer	Option exercise	Restricted Share Units	960	-^{footnote F1}	-
Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Oct 1, 2026	Garth Ritchie - Director	Option exercise	Ordinary Shares	17	$0.00^{footnote F1}	-
Oct 1, 2026	Garth Ritchie - Director	Option exercise	Ordinary Shares	67	$0.00^{footnote F1}	-
Oct 1, 2026	Garth Ritchie - Director	Option exercise	Ordinary Shares	84	$0.00^{footnote F1}	-
Oct 1, 2026	Garth Ritchie - Director	Option exercise	Ordinary Shares	84	$0.00^{footnote F1}	-
Oct 1, 2026	Garth Ritchie - Director	Option exercise	Restricted Share Units	17	-^{footnote F1}	-
Oct 1, 2026	Garth Ritchie - Director	Option exercise	Restricted Share Units	67	-^{footnote F1}	-
Oct 1, 2026	Garth Ritchie - Director	Option exercise	Restricted Share Units	84	-^{footnote F1}	-
Oct 1, 2026	Garth Ritchie - Director	Option exercise	Restricted Share Units	84	-^{footnote F1}	-
Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Oct 1, 2026	Ben Simon Wilder - Officer	Option exercise	Ordinary Shares	278	$0.00^{footnote F1}	-
Oct 1, 2026	Ben Simon Wilder - Officer	Option exercise	Ordinary Shares	167	$0.00^{footnote F1}	-
Oct 1, 2026	Ben Simon Wilder - Officer	Option exercise	Restricted Share Units	278	-^{footnote F1}	-
Oct 1, 2026	Ben Simon Wilder - Officer	Option exercise	Restricted Share Units	167	-^{footnote F1}	-
Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Oct 1, 2026	Patrick Willcocks - Officer	Option exercise	Ordinary Shares	695	$0.00^{footnote F1}	-
Oct 1, 2026	Patrick Willcocks - Officer	Option exercise	Ordinary Shares	150	$0.00^{footnote F1}	-
Oct 1, 2026	Patrick Willcocks - Officer	Option exercise	Ordinary Shares	306	$0.00^{footnote F1}	-
Oct 1, 2026	Patrick Willcocks - Officer	Option exercise	Restricted Share Units	695	-^{footnote F1}	-
Oct 1, 2026	Patrick Willcocks - Officer	Option exercise	Restricted Share Units	150	-^{footnote F1}	-
Oct 1, 2026	Patrick Willcocks - Officer	Option exercise	Restricted Share Units	306	-^{footnote F1}	-
Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Sep 22, 2026	D'Ovidio Manfredi Lefebvre - Director	Other	Ordinary Shares	4,600,000	$2.50	$11.50M
Sep 22, 2026	D'Ovidio Manfredi Lefebvre - Director	Other	Ordinary Share Purchase Warrants (right to buy)	4,600,000	$0.00	-
Jul 17, 2026	Carlo Calabria - Director	Option exercise	Ordinary Shares	757	$0.00^{footnote F1}	-
Jul 17, 2026	Carlo Calabria - Director	Option exercise	Restricted Share Units	757	$0.00	-
Footnote F1 (price): Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested within the week of the grant date.
Jul 17, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Ordinary Shares	673	$0.00^{footnote F1}	-
Jul 17, 2026	D'Ovidio Manfredi Lefebvre - Director	Option exercise	Restricted Share Units	673	$0.00	-
Footnote F1 (price): Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested within the week of the grant date.

Recent ARQQ Form 144 notices of proposed sale

An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.

Filed	Filer	Relationship	Shares	Market value	Notice
Oct 13, 2026	Leaver Andrew	Officer, Director	2,573	$42K	View on EDGAR
Oct 6, 2026	Patrick Willcocks	Officer	555

ARQQ insider trading FAQ

What is the latest insider trade for ARQQ?

Arqit Quantum Inc. (ARQQ) had 28 insider filings in the last 90 days, with the most recent on 21 October 2026. The full record for ARQQ runs to 89 Form 4 filings, the earliest from 3 April 2026. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.

How many insiders are buying ARQQ stock?

No insider purchases of ARQQ were filed in the last 90 days.

How many insiders are selling ARQQ stock?

13 insider sales of ARQQ were filed in the last 90 days, totaling $254K.

Where can I see ARQQ SEC filings (Form 4, 10-K, 10-Q, 8-K)?

This page collects ARQQ Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.

More Information Technology companies with insider activity

Recent insider filings

The EDGAR links open each original Form 4, so you can check any number on this page against the filing it came from.

Oct 21, 2026 - D'Ovidio Manfredi Lefebvre view on EDGAR
Oct 20, 2026 - Carlo Calabria view on EDGAR
Oct 20, 2026 - Garth Ritchie view on EDGAR
Oct 15, 2026 - Andrew Leaver view on EDGAR
Oct 13, 2026 - Andrew Leaver view on EDGAR
Oct 8, 2026 - Ben Simon Wilder view on EDGAR
Oct 8, 2026 - Nicholas William Nilan view on EDGAR
Oct 8, 2026 - Garth Ritchie view on EDGAR
Oct 8, 2026 - Patrick Willcocks view on EDGAR

Related companies with recent insider activity

Learn more

Insider selling: signal or noise?: Why most insider sales are routine, and the few patterns worth a second look.
Form 144 vs Form 4: A Form 144 announces a planned sale; the Form 4 reports it after it happens.
Insider activity in Information Technology: Where ARQQ's peers are being bought and sold.
Every recent Form 4: The market-wide feed, updated as filings arrive from SEC EDGAR.

Follow ARQQ with a 7-day demo

ARQQ on your watchlist
Every ARQQ Form 4 filing on record
Up to 3 months of ARQQ price history
The daily trading plan of ranked insider buys, on a delay, with the plan archive

Start 7-day demoCard required. Your card is never charged for the demo.

Form 4 transaction type

Transactions

Total value

Open-market sale

11,397

$254K

Grant or award

2,757

Option exercise

100

58,564

Traded

Insider

Transaction

Security

Price

Value

Oct 16, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Ordinary Shares

817

$0.00^{footnote F1}

Oct 15, 2026

D'Ovidio Manfredi Lefebvre - Director

Grant or award

Restricted Share Units

817

$0.00

Oct 16, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Restricted Share Units

817

$0.00

Footnote F1 (price): Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested within the week of the grant date.

Oct 16, 2026

Carlo Calabria - Director

Option exercise

Ordinary Shares

919

$0.00^{footnote F1}

Oct 15, 2026

Carlo Calabria - Director

Grant or award

Restricted Share Units

919

$0.00

Oct 16, 2026

Carlo Calabria - Director

Option exercise

Restricted Share Units

919

$0.00

Footnote F1 (price): Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested within the week of the grant date.

Oct 16, 2026

Garth Ritchie - Director

Option exercise

Ordinary Shares

1,021

$0.00^{footnote F1}

Oct 15, 2026

Garth Ritchie - Director

Grant or award

Restricted Share Units

1,021

$0.00

Oct 16, 2026

Garth Ritchie - Director

Option exercise

Restricted Share Units

1,021

$0.00

Footnote F1 (price): Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested within the week of the grant date.

Oct 13, 2026

Andrew Leaver - Officer

Open-market sale

Ordinary Shares

2,573

$16.40

$42K

Oct 12, 2026

Andrew Leaver - Officer

Option exercise

Ordinary Shares

5,209

$0.00^{footnote F1}

Oct 12, 2026

Andrew Leaver - Officer

Option exercise

Restricted Share Units

5,209

$0.00

Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

Oct 6, 2026

Ben Simon Wilder - Officer

Open-market sale

Ordinary Shares

218

$24.19

$5K

Oct 6, 2026

Nicholas William Nilan - Officer

Open-market sale

Ordinary Shares

493

$24.19

$12K

Oct 6, 2026

Garth Ritchie - Director

Open-market sale

Ordinary Shares

118

$24.19

$3K

Oct 6, 2026

Patrick Willcocks - Officer

Open-market sale

Ordinary Shares

555

$24.19

$13K

Oct 6, 2026

Paul Feenan - Officer

Open-market sale

Ordinary Shares

504

$24.19

$12K

Oct 6, 2026

Andrew Leaver - Officer

Open-market sale

Ordinary Shares

2,398

$24.19

$58K

Oct 5, 2026

Andrew Leaver - Officer

Open-market sale

Ordinary Shares

2,535

$23.78

$60K

Oct 5, 2026

Andrew Leaver - Officer

Other

Ordinary Shares

5,209

$0.00^{footnote F2}

Oct 5, 2026

Andrew Leaver - Officer

Option exercise

Ordinary Shares

5,208

$0.00^{footnote F2}

Oct 5, 2026

Andrew Leaver - Officer

Other

Ordinary Shares

2,818

$24.47^{footnote F3}

$69K

Oct 5, 2026

Andrew Leaver - Officer

Other

Restricted Share Units

5,209

$0.00^{footnote F2}

Oct 5, 2026

Andrew Leaver - Officer

Option exercise

Restricted Share Units

5,208

$0.00

Footnote F2 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.
Footnote F3 (price): The price for acquiring these ordinary shares is the same price that the units were sold for on October 2.

Oct 5, 2026

Carlo Calabria - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 5, 2026

Carlo Calabria - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 5, 2026

Carlo Calabria - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 5, 2026

Carlo Calabria - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 5, 2026

Carlo Calabria - Director

Option exercise

Restricted Share Units

$0.00

Oct 5, 2026

Carlo Calabria - Director

Option exercise

Restricted Share Units

$0.00

Oct 5, 2026

Carlo Calabria - Director

Option exercise

Restricted Share Units

$0.00

Oct 5, 2026

Carlo Calabria - Director

Option exercise

Restricted Share Units

$0.00

Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

Oct 5, 2026

Paul Feenan - Officer

Option exercise

Ordinary Shares

555

$0.00^{footnote F1}

Oct 5, 2026

Paul Feenan - Officer

Option exercise

Ordinary Shares

157

$0.00^{footnote F1}

Oct 5, 2026

Paul Feenan - Officer

Option exercise

Ordinary Shares

322

$0.00^{footnote F1}

Oct 5, 2026

Paul Feenan - Officer

Open-market sale

Ordinary Shares

533

$23.78

$13K

Oct 5, 2026

Paul Feenan - Officer

Option exercise

Restricted Share Units

555

$0.00

Oct 5, 2026

Paul Feenan - Officer

Option exercise

Restricted Share Units

157

$0.00

Oct 5, 2026

Paul Feenan - Officer

Option exercise

Restricted Share Units

322

$0.00

Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

Oct 5, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Ordinary Shares

1,111

$0.00^{footnote F1}

Oct 5, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 5, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 5, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 5, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 5, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Restricted Share Units

1,111

$0.00

Oct 5, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Restricted Share Units

$0.00

Oct 5, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Restricted Share Units

$0.00

Oct 5, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Restricted Share Units

$0.00

Oct 5, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Restricted Share Units

$0.00

Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

Oct 5, 2026

Nicholas William Nilan - Officer

Option exercise

Ordinary Shares

959

$0.00^{footnote F1}

Oct 5, 2026

Nicholas William Nilan - Officer

Open-market sale

Ordinary Shares

522

$23.78

$12K

Oct 5, 2026

Nicholas William Nilan - Officer

Option exercise

Restricted Share Units

959

$0.00

Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

Oct 5, 2026

Garth Ritchie - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 5, 2026

Garth Ritchie - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 5, 2026

Garth Ritchie - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 5, 2026

Garth Ritchie - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 5, 2026

Garth Ritchie - Director

Open-market sale

Ordinary Shares

127

$23.78

$3K

Oct 5, 2026

Garth Ritchie - Director

Option exercise

Restricted Share Units

$0.00

Oct 5, 2026

Garth Ritchie - Director

Option exercise

Restricted Share Units

$0.00

Oct 5, 2026

Garth Ritchie - Director

Option exercise

Restricted Share Units

$0.00

Oct 5, 2026

Garth Ritchie - Director

Option exercise

Restricted Share Units

$0.00

Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

Oct 5, 2026

Ben Simon Wilder - Officer

Option exercise

Ordinary Shares

277

$0.00^{footnote F1}

Oct 5, 2026

Ben Simon Wilder - Officer

Option exercise

Ordinary Shares

166

$0.00^{footnote F1}

Oct 5, 2026

Ben Simon Wilder - Officer

Open-market sale

Ordinary Shares

233

$23.78

$6K

Oct 5, 2026

Ben Simon Wilder - Officer

Option exercise

Restricted Share Units

277

$0.00

Oct 5, 2026

Ben Simon Wilder - Officer

Option exercise

Restricted Share Units

166

$0.00

Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

Oct 5, 2026

Patrick Willcocks - Officer

Option exercise

Ordinary Shares

694

$0.00^{footnote F1}

Oct 5, 2026

Patrick Willcocks - Officer

Option exercise

Ordinary Shares

149

$0.00^{footnote F1}

Oct 5, 2026

Patrick Willcocks - Officer

Option exercise

Ordinary Shares

305

$0.00^{footnote F1}

Oct 5, 2026

Patrick Willcocks - Officer

Open-market sale

Ordinary Shares

588

$23.78

$14K

Oct 5, 2026

Patrick Willcocks - Officer

Option exercise

Restricted Share Units

694

$0.00

Oct 5, 2026

Patrick Willcocks - Officer

Option exercise

Restricted Share Units

149

$0.00

Oct 5, 2026

Patrick Willcocks - Officer

Option exercise

Restricted Share Units

305

$0.00

Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

Oct 1, 2026

Carlo Calabria - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 1, 2026

Carlo Calabria - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 1, 2026

Carlo Calabria - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 1, 2026

Carlo Calabria - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 1, 2026

Carlo Calabria - Director

Option exercise

Restricted Share Units

-^{footnote F1}

Oct 1, 2026

Carlo Calabria - Director

Option exercise

Restricted Share Units

-^{footnote F1}

Oct 1, 2026

Carlo Calabria - Director

Option exercise

Restricted Share Units

-^{footnote F1}

Oct 1, 2026

Carlo Calabria - Director

Option exercise

Restricted Share Units

-^{footnote F1}

Footnote F1 (price): Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

Oct 1, 2026

Paul Feenan - Officer

Option exercise

Ordinary Shares

556

$0.00

Oct 1, 2026

Paul Feenan - Officer

Option exercise

Ordinary Shares

158

$0.00^{footnote F1}

Oct 1, 2026

Paul Feenan - Officer

Option exercise

Ordinary Shares

322

$0.00^{footnote F1}

Oct 1, 2026

Paul Feenan - Officer

Option exercise

Restricted Share Units

556

$0.00

Oct 1, 2026

Paul Feenan - Officer

Option exercise

Restricted Share Units

158

-^{footnote F1}

Oct 1, 2026

Paul Feenan - Officer

Option exercise

Restricted Share Units

322

-^{footnote F1}

Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

Oct 1, 2026

Andrew Leaver - Officer

Option exercise

Ordinary Shares

5,209

$0.00^{footnote F1}

Oct 1, 2026

Andrew Leaver - Officer

Option exercise

Restricted Share Units

5,209

-^{footnote F1}

Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

Oct 1, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Ordinary Shares

1,112

$0.00^{footnote F1}

Oct 1, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 1, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 1, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 1, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 1, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Restricted Share Units

1,112

-^{footnote F1}

Oct 1, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Restricted Share Units

-^{footnote F1}

Oct 1, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Restricted Share Units

-^{footnote F1}

Oct 1, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Restricted Share Units

-^{footnote F1}

Oct 1, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Restricted Share Units

-^{footnote F1}

Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

Oct 1, 2026

Nicholas William Nilan - Officer

Option exercise

Ordinary Shares

960

$0.00^{footnote F1}

Oct 1, 2026

Nicholas William Nilan - Officer

Option exercise

Restricted Share Units

960

-^{footnote F1}

Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

Oct 1, 2026

Garth Ritchie - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 1, 2026

Garth Ritchie - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 1, 2026

Garth Ritchie - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 1, 2026

Garth Ritchie - Director

Option exercise

Ordinary Shares

$0.00^{footnote F1}

Oct 1, 2026

Garth Ritchie - Director

Option exercise

Restricted Share Units

-^{footnote F1}

Oct 1, 2026

Garth Ritchie - Director

Option exercise

Restricted Share Units

-^{footnote F1}

Oct 1, 2026

Garth Ritchie - Director

Option exercise

Restricted Share Units

-^{footnote F1}

Oct 1, 2026

Garth Ritchie - Director

Option exercise

Restricted Share Units

-^{footnote F1}

Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

Oct 1, 2026

Ben Simon Wilder - Officer

Option exercise

Ordinary Shares

278

$0.00^{footnote F1}

Oct 1, 2026

Ben Simon Wilder - Officer

Option exercise

Ordinary Shares

167

$0.00^{footnote F1}

Oct 1, 2026

Ben Simon Wilder - Officer

Option exercise

Restricted Share Units

278

-^{footnote F1}

Oct 1, 2026

Ben Simon Wilder - Officer

Option exercise

Restricted Share Units

167

-^{footnote F1}

Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

Oct 1, 2026

Patrick Willcocks - Officer

Option exercise

Ordinary Shares

695

$0.00^{footnote F1}

Oct 1, 2026

Patrick Willcocks - Officer

Option exercise

Ordinary Shares

150

$0.00^{footnote F1}

Oct 1, 2026

Patrick Willcocks - Officer

Option exercise

Ordinary Shares

306

$0.00^{footnote F1}

Oct 1, 2026

Patrick Willcocks - Officer

Option exercise

Restricted Share Units

695

-^{footnote F1}

Oct 1, 2026

Patrick Willcocks - Officer

Option exercise

Restricted Share Units

150

-^{footnote F1}

Oct 1, 2026

Patrick Willcocks - Officer

Option exercise

Restricted Share Units

306

-^{footnote F1}

Footnote F1 (price): The Restricted Share Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis.

Sep 22, 2026

D'Ovidio Manfredi Lefebvre - Director

Other

Ordinary Shares

4,600,000

$2.50

$11.50M

Sep 22, 2026

D'Ovidio Manfredi Lefebvre - Director

Other

Ordinary Share Purchase Warrants (right to buy)

4,600,000

$0.00

Jul 17, 2026

Carlo Calabria - Director

Option exercise

Ordinary Shares

757

$0.00^{footnote F1}

Jul 17, 2026

Carlo Calabria - Director

Option exercise

Restricted Share Units

757

$0.00

Footnote F1 (price): Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested within the week of the grant date.

Jul 17, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Ordinary Shares

673

$0.00^{footnote F1}

Jul 17, 2026

D'Ovidio Manfredi Lefebvre - Director

Option exercise

Restricted Share Units

673

$0.00

Footnote F1 (price): Restricted Stock Units ("RSUs") convert into ARQQ ordinary shares on a one-for-one basis. The RSUs vested within the week of the grant date.

Filed

Filer

Relationship

Market value

Notice

Oct 13, 2026

Leaver Andrew

Officer, Director

2,573

$42K

View on EDGAR

Oct 6, 2026

Patrick Willcocks

Officer

555