Company · Ownership research

Arqit Quantum Inc. ARQQ

CIK 0001859690 · CUSIP G0567U127

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

Several CUSIPs are reported for this company; this page shows CUSIP G0567U127 (ARQQ), not CUSIP G0567U907 (ARQQ), CUSIP G0567U957 (ARQQ), CUSIP G0567U101 (ARQQ), and does not merge CUSIPs.

This page lists the top 20 of 60 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	Defiance ETFs, LLC CIK 1732541 · View history	$30.25M 1,378,655 shares	0.99%	—	SEC filing ↗ Feb 17, 2026	▾
02	Penserra Capital Management LLC CIK 1593324 · View history	$30.16M 1,378,655 shares	0.36%	+357.41K(+35.00%)Added	SEC filing ↗ Feb 12, 2026	▾
03	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. CIK 1705339 · View history	$6.60M 301,713 shares	0.01%	+301.71KNew	SEC filing ↗ Feb 17, 2026	▾
04	UBS Group AG CIK 1610520 · View history	$3.23M 147,397 shares	0.00%	+70.81K(+92.50%)Added	SEC filing ↗ Jan 29, 2026	▾
05	Legal & General Group Plc CIK 764068 · View history	$1.45M 66,232 shares	0.00%	-9.54K(-12.60%)Reduced	SEC filing ↗ Feb 9, 2026	▾
06	JANE STREET GROUP, LLC CIK 1595888 · View history	$1.44M 65,775 shares	0.00%	+36.47K(+124.50%)Added	SEC filing ↗ Feb 12, 2026	▾
07	RAYMOND JAMES FINANCIAL INC CIK 720005 · View history	$1.38M 63,253 shares	0.00%	-21.46K(-25.30%)Reduced	SEC filing ↗ Feb 18, 2026	▾
08	Kessler Investment Group, LLC CIK 1525947 · View history	$1.05M 47,849 shares	0.44%	+47.85KNew	SEC filing ↗ Feb 3, 2026	▾
09	BANQUE PICTET & CIE SA CIK 1535602 · View history	$787.68K 36,000 shares	0.01%	0(0.00%)Unchanged	SEC filing ↗ Jan 16, 2026	▾
10	SBI Securities Co., Ltd. CIK 1851815 · View history	$680.01K 31,079 shares	0.02%	-9.17K(-22.80%)Reduced	SEC filing ↗ Feb 3, 2026	▾
11	NATIONAL BANK OF CANADA /FI/ CIK 926171 · View history	$663.69K 30,334 shares	0.00%	+29.63K(+4,196.60%)Added	SEC filing ↗ Feb 17, 2026	▾
12	SUSQUEHANNA INTERNATIONAL GROUP, LLP CIK 1446194 · View history	$438.32K 20,033 shares	0.00%	-172.78K(-89.60%)Reduced	SEC filing ↗ Feb 17, 2026	▾
13	Advisory Services Network, LLC CIK 1573876 · View history	$436.38K 19,944 shares	0.01%	0(0.00%)Unchanged	SEC filing ↗ Feb 17, 2026	▾
14	BANK OF AMERICA CORP /DE/ CIK 70858 · View history	$426.75K 19,504 shares	0.00%	+19.21K(+6,625.50%)Added	SEC filing ↗ Feb 17, 2026	▾
15	Bank of New York Mellon Corp CIK 1390777 · View history	$415.20K 18,976 shares	0.00%	+18.98KNew	SEC filing ↗ Feb 10, 2026	▾
16	CITIGROUP INC CIK 831001 · View history	$412.63K 18,859 shares	0.00%	+9.34K(+98.20%)Added	SEC filing ↗ Feb 13, 2026	▾
17	GROUP ONE TRADING LLC CIK 932540 · View history	$345.68K 15,799 shares	0.01%	+10.56K(+201.70%)Added	SEC filing ↗ Feb 12, 2026	▾
18	VAN ECK ASSOCIATES CORP CIK 869178 · View history	$289.00K 13,193 shares	0.00%	-13.42K(-50.40%)Reduced	SEC filing ↗ Feb 13, 2026	▾
19	Veracity Capital LLC CIK 1811005 · View history	$267.09K 12,207 shares	0.08%	-813(-6.20%)Reduced	SEC filing ↗ Jan 29, 2026	▾
20	Stonehage Fleming Financial Services Holdings Ltd CIK 1786379 · View history	$252.23K 11,528 shares	0.01%	+11.53KNew	SEC filing ↗ Jan 13, 2026	▾

Showing 20 / 60 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

Cancelled or null records excluded

Disclosed shares

3,758,584

Not deduplicated across managers

Disclosed value

$82.32M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

Arqit Quantum Inc. · Q4 2025

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.