$ARQQ

$16.30 -$0.11 (0.7%) Close

$ARQQ Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 15.3M shares outstanding

Who owns ARQQ?

By type of holder

Institutions 80.5% Insiders 0.0% Everyone else 19.5%

Concentration Top 10 holders own 264.4%

Manfredi Lefebvre d'Ovidio 60.8% · M Management S.A. 60.5%

Institutional ownership

80.5%

+54.2 pts vs last qtr

Institutional holders

+8 vs last qtr

Net shares bought

+8.3M

by institutions in Q2 2026

New / sold out

21 / 13

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Defiance ETFs, LLC +3.6M
Penserra Capital Management LLC +3.6M

Biggest sellers in Q2 2026

MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. −136.1K
Renaissance Technologies LLC SOLD OUT −41.4K

Who is planning to sell?

Notices of proposed sale, last 12 months

$2.08M

45 notices from 8 people

Shares covered

94.3K

0.62% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Leaver Andrew Officer $869K
Pointon Nicholas Former officer $557K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

There are not yet two fiscal years of reported share counts for Arqit Quantum Inc.

How patient are the owners?

Institutional shares by how long they've been held

5+ years0% 3–5 years0% 1–3 years50% Under 1 year50%

Quarterly turnover

110.6%

of institutional shares changed hands

Top 10 managers, median time held

3 quarters

Super Investors

Investment managers reporting ARQQ on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
DE Defiance ETFs, LLC	5.1M	33.34%	+3.6M (+251.1%)	Q4 '25	2.0%
Shares held by quarter Peak holding5.1M (Q2'26) Change over 8 quarters+5.1M Share of the company33.340% Defiance ETFs, LLC's full portfolio →
PC Penserra Capital Management LLC	5.1M	33.23%	+3.6M (+249.9%)	2025	1.2%
Shares held by quarter Peak holding5.1M (Q2'26) Change over 8 quarters+5.1M Share of the company33.230% Penserra Capital Management LLC's full portfolio →

Defiance ETFs, LLC

5.1M

% of company

33.34%

Change vs last qtr

+3.6M (+251.1%)

Held since

Q4 '25

Penserra Capital Management LLC

5.1M

% of company

33.23%

Change vs last qtr

+3.6M (+249.9%)

Held since

2025

28 more super investors behind a free account

See every manager holding Arqit Quantum Inc, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting ARQQ on Form N-PORT; together they hold 1.4% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
GX Global X Cybersecurity ETF Global X Funds	$2.97M	180.0K	1.18%	0.25%	May 31, 2026
MG Mango Growth ETF Advisors' Inner Circle Fund II	$538K	31.4K	0.21%	0.19%	July 31, 2026

Global X Cybersecurity ETF

Global X Funds

Position value

$2.97M

% of company

1.18%

% of the fund

0.25%

As of

May 31, 2026

Mango Growth ETF

Advisors' Inner Circle Fund II

Position value

$538K

% of company

0.21%

% of the fund

0.19%

As of

July 31, 2026

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
ML Manfredi Lefebvre d'Ovidio 5%+ holder 13D · 38.6%	9.3M	60.81%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company60.810% Disclosed stake13D · 38.6% View the 13D/G filing →
MM M Management S.A. 5%+ holder 13D · 38.4%	9.2M	60.49%	—	—	—	—
This holder reports through Schedule 13D/G, not a quarterly 13F. Share of the company60.490% Disclosed stake13D · 38.4% View the 13D/G filing →

Manfredi Lefebvre d'Ovidio

5%+ holder13D · 38.6%

9.3M

% of company

60.81%

Change vs last qtr

—

Held since

—

M Management S.A.

5%+ holder13D · 38.4%

9.2M

% of company

60.49%

Change vs last qtr

—

Held since

—

6 more holders behind a free account

See every insider and 5%+ holder of Arqit Quantum Inc.

Comments