ARQQ ARQIT QUANTUM INC

Stock (common), issuer CIK 1859690

Filings received so far for Q3 2026: 3 13F filers report a position in ARQQ shares at 2026-09-30. The quarter is not complete: its 13F deadline is 2026-11-14, and the counts grow as filings arrive.

13D and 13G filers

No 13D or 13G on this security in the data. Structured 13D/G data starts 2024-12-18.

Insider trades

The latest Form 4 transactions, non-derivative.
Owner	Date	Shares	Price	Filing
Wilder Ben Simonofficer (Chief Operating Officer)	2026-10-06	-218 S	$24.1915	Form 4
Nilan Nicholas Williamofficer (General Manager-US)	2026-10-06	-493 S	$24.1915	Form 4
Ritchie Garthdirector	2026-10-06	-118 S	$24.1915	Form 4
Willcocks Patrickofficer (General Counsel)	2026-10-06	-555 S	$24.1915	Form 4
Feenan Paulofficer (Chief Revenue Officer)	2026-10-06	-504 S	$24.1915	Form 4
Leaver Andrewofficer (Chief Executive Officer)	2026-10-06	-2,398 S	$24.1915	Form 4
Leaver Andrewofficer (Chief Executive Officer)	2026-10-05	-2,818 J	$24.4743	Form 4
Leaver Andrewofficer (Chief Executive Officer)	2026-10-05	+5,208 M	$0	Form 4
Leaver Andrewofficer (Chief Executive Officer)	2026-10-05	-5,209 J	$0	Form 4
Leaver Andrewofficer (Chief Executive Officer)	2026-10-05	-2,535 S	$23.7847	Form 4
Calabria Carlodirector	2026-10-05	+83 M	$0	Form 4
Calabria Carlodirector	2026-10-05	+83 M	$0	Form 4
Calabria Carlodirector	2026-10-05	+66 M	$0	Form 4
Calabria Carlodirector	2026-10-05	+16 M	$0	Form 4
Feenan Paulofficer (Chief Revenue Officer)	2026-10-05	-533 S	$23.7847	Form 4

13F holders, Q3 2026

Filers in the available 13F reports with a share position at 2026-09-30, filer groups collapsed to one row (method), largest first. Options and principal amounts are left out. A group row states no % of portfolio, since each member reports its own portfolio: the members' percents are listed under it. A value about 1,000 times or 1/1,000 of the price other filers imply is shown as filed but neither ranks the row nor enters a sum.

Holder	Shares	Value	% of portfolio	Change	Source
Kessler Investment Group, LLC	138,545	$3.33M	1.61%	-14,560	13F-HR Timeline
Farther Finance Advisors, LLC	372	$8.95K	<0.01%	+200	13F-HR Timeline
CoreCap Advisors, LLC	16	$385	<0.01%	0	13F-HR Timeline

Events

Wilder Ben Simon sold 218 ARQQ shares on 2026-10-06, Form 4 filed 2026-10-08. 0001859690-26-000191
Accepted 2026-10-08 22:19:13 UTC, ingested 2026-10-08 22:19:53 UTC
Nilan Nicholas William sold 493 ARQQ shares on 2026-10-06, Form 4 filed 2026-10-08. 0001859690-26-000190
Accepted 2026-10-08 22:18:34 UTC, ingested 2026-10-08 22:19:52 UTC
Ritchie Garth sold 118 ARQQ shares on 2026-10-06, Form 4 filed 2026-10-08. 0001859690-26-000189
Accepted 2026-10-08 22:17:46 UTC, ingested 2026-10-08 22:18:53 UTC
Willcocks Patrick sold 555 ARQQ shares on 2026-10-06, Form 4 filed 2026-10-08. 0001859690-26-000188
Accepted 2026-10-08 22:16:44 UTC, ingested 2026-10-08 22:17:52 UTC
Feenan Paul sold 504 ARQQ shares on 2026-10-06, Form 4 filed 2026-10-08. 0001859690-26-000187
Accepted 2026-10-08 22:15:58 UTC, ingested 2026-10-08 22:16:52 UTC
Leaver Andrew sold 2,398 ARQQ shares on 2026-10-06, Form 4 filed 2026-10-08. 0001859690-26-000186
Accepted 2026-10-08 22:15:14 UTC, ingested 2026-10-08 22:15:53 UTC
Leaver Andrew disposed of 5,354 ARQQ shares on 2026-10-05, Form 4 filed 2026-10-07. 0001859690-26-000185
Accepted 2026-10-07 23:52:58 UTC, ingested 2026-10-07 23:53:40 UTC
Calabria Carlo acquired 248 ARQQ shares on 2026-10-05, Form 4 filed 2026-10-07. 0001859690-26-000184
Accepted 2026-10-07 23:51:15 UTC, ingested 2026-10-07 23:52:49 UTC
Feenan Paul acquired 501 ARQQ shares on 2026-10-05, Form 4 filed 2026-10-07. 0001859690-26-000183
Accepted 2026-10-07 23:49:30 UTC, ingested 2026-10-07 23:50:40 UTC
Lefebvre d'Ovidio Manfredi acquired 1,359 ARQQ shares on 2026-10-05, Form 4 filed 2026-10-07. 0001859690-26-000182
Accepted 2026-10-07 23:47:57 UTC, ingested 2026-10-07 23:48:40 UTC
Nilan Nicholas William acquired 437 ARQQ shares on 2026-10-05, Form 4 filed 2026-10-07. 0001859690-26-000181
Accepted 2026-10-07 23:45:56 UTC, ingested 2026-10-07 23:46:40 UTC
Ritchie Garth acquired 121 ARQQ shares on 2026-10-05, Form 4 filed 2026-10-07. 0001859690-26-000180
Accepted 2026-10-07 23:44:01 UTC, ingested 2026-10-07 23:44:40 UTC
Wilder Ben Simon acquired 210 ARQQ shares on 2026-10-05, Form 4 filed 2026-10-07. 0001859690-26-000179
Accepted 2026-10-07 23:42:04 UTC, ingested 2026-10-07 23:42:40 UTC
Willcocks Patrick acquired 560 ARQQ shares on 2026-10-05, Form 4 filed 2026-10-07. 0001859690-26-000178
Accepted 2026-10-07 23:40:31 UTC, ingested 2026-10-07 23:41:40 UTC
Willcocks Patrick acquired 591 ARQQ shares on 2026-10-02, Form 4 filed 2026-10-06. 0001859690-26-000177
Accepted 2026-10-06 23:46:30 UTC, ingested 2026-10-06 23:47:48 UTC
Wilder Ben Simon acquired 224 ARQQ shares on 2026-10-02, Form 4 filed 2026-10-06. 0001859690-26-000176
Accepted 2026-10-06 23:45:26 UTC, ingested 2026-10-06 23:45:49 UTC
Ritchie Garth acquired 129 ARQQ shares on 2026-10-02, Form 4 filed 2026-10-06. 0001859690-26-000175
Accepted 2026-10-06 23:44:34 UTC, ingested 2026-10-06 23:45:49 UTC
Nilan Nicholas William acquired 466 ARQQ shares on 2026-10-02, Form 4 filed 2026-10-06. 0001859690-26-000174
Accepted 2026-10-06 23:43:30 UTC, ingested 2026-10-06 23:44:48 UTC
Leaver Andrew acquired 2,390 ARQQ shares on 2026-10-02, Form 4 filed 2026-10-06. 0001859690-26-000173
Accepted 2026-10-06 23:42:16 UTC, ingested 2026-10-06 23:42:49 UTC
Feenan Paul acquired 528 ARQQ shares on 2026-10-02, Form 4 filed 2026-10-06. 0001859690-26-000172
Accepted 2026-10-06 23:41:16 UTC, ingested 2026-10-06 23:41:48 UTC