Arqit Quantum Inc. (ARQQ) Ownership
ARQQ ownership summary
as of October 17, 2026- Institutions
- 82.6% of shares outstanding
- Insiders
- 2.67% of shares outstanding
- Shares outstanding
- 17.4M
- Float
- 5.0M shares available to trade
- Short interest
- 17.79% 2.3M shares short
- Days to cover
- 6.12 short interest down 7.3% vs prior month
- Institutions 82.58%
- Insiders 2.67%
- Other investors 14.75%
ARQQ top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Defiance ETFs, LLC | 33.80% | 5.1M | $71.5M | +3.6M (+251.1%) | June 30, 2026 |
| 2 | Penserra Capital Management, LLC | 33.68% | 5.1M | $71.2M | +3.6M (+249.9%) | June 30, 2026 |
| 3 | UBS Group AG | 3.47% | 523K | $7.3M | +437,439 (+512.0%) | June 30, 2026 |
| 4 | Legal & General Group PLC | 1.83% | 276K | $3.9M | +223,307 (+424.3%) | June 30, 2026 |
| 5 | NATIONAL BANK OF CANADA /FI/ | 1.41% | 212K | $3.0M | +210,907 (+19,296.2%) | June 30, 2026 |
| 6 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 1.25% | 188K | $2.6M | −136,127 (−42.0%) | June 30, 2026 |
| 7 | Kessler Investment Group, LLC | 1.01% | 153K | $2.1M | −4,464 (−2.8%) | June 30, 2026 |
| 8 | Bank of New York Mellon Corp | 0.66% | 99K | $1.4M | +87,234 (+732.3%) | June 30, 2026 |
| 9 | Millennium Management LLC | 0.52% | 79K | $1.1M | +24,691 (+45.7%) | June 30, 2026 |
| 10 | Bank of America Corp | 0.36% | 54K | $759,772 | +35,000 (+182.4%) | June 30, 2026 |
| 11 | Van Eck Associates Corporation | 0.33% | 49K | $693,808 | +29,334 (+145.6%) | June 30, 2026 |
| 12 | Cetera Investment Advisers | 0.25% | 38K | $535,536 | +38,198 (0.0%) | June 30, 2026 |
| 13 | Banque Pictet & Cie SA | 0.24% | 36K | $504,720 | — | June 30, 2026 |
| 14 | KKM Financial LLC | 0.21% | 31K | $440,144 | +31,394 (0.0%) | June 30, 2026 |
| 15 | Man Group PLC | 0.17% | 26K | $367,464 | +26,210 (0.0%) | June 30, 2026 |
| 16 | SBI Securities Co Ltd | 0.17% | 26K | $366,413 | −974 (−3.6%) | June 30, 2026 |
| 17 | Advisory Services Network, LLC | 0.14% | 22K | $304,753 | −10 (−0.0%) | June 30, 2026 |
| 18 | Zurcher Kantonalbank | 0.14% | 21K | $298,570 | +11,318 (+113.4%) | June 30, 2026 |
| 19 | Wells Fargo & Co | 0.14% | 21K | $298,500 | +6,198 (+41.1%) | June 30, 2026 |
| 20 | LPL Financial Corp | 0.11% | 17K | $239,868 | +17,109 (0.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 15 holders added 8.5M shares and 4 cut 142K.
ARQQ top mutual fund and ETF holders
19 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Global X Cybersecurity ETF | 1.69% | 255K | $3.6M | +1,120 (+0.4%) | September 30, 2026 |
| 2 | Undly L&G Future World UK Eq Idx Fd | 1.66% | 250K | $3.5M | +204,512 (+447.9%) | June 30, 2026 |
| 3 | VanEck Quantum Cmptg ETF A USD Acc | 0.60% | 91K | $1.3M | — | September 30, 2026 |
| 4 | Defiance Pure Quantum ETF | 0.48% | 73K | $1.0M | +3,934 (+5.7%) | September 30, 2026 |
| 5 | Optimix Wereld Aandelen Fonds | 0.23% | 35K | $490,700 | — | August 31, 2026 |
| 6 | Corgi Quantum Computing ETF | 0.21% | 32K | $446,916 | −2,108 (−6.2%) | September 30, 2026 |
| 7 | Mango Growth ETF | 0.21% | 32K | $441,658 | — | September 30, 2026 |
| 8 | L&G Fut Wld ESG Tilted & Optd UKIdxL£Acc | 0.17% | 26K | $361,225 | — | July 31, 2026 |
| 9 | State Street® SPDR® Ptf Dev Wld exUS ETF | 0.12% | 19K | $263,576 | — | September 30, 2026 |
| 10 | Boreas Solactive Quantum Cmptg ETFUSDAcc | 0.10% | 15K | $216,623 | +1,122 (+7.8%) | September 30, 2026 |
| 11 | Engelberg Global Equity IC Ltd B USD | 0.10% | 15K | $210,300 | −2,000 (−11.8%) | September 30, 2026 |
| 12 | Evolve Cyber Security ETF Hdg | 0.08% | 12K | $173,133 | −247 (−2.0%) | September 30, 2026 |
| 13 | Global X Cybersecurity ETF USD Acc | 0.08% | 12K | $170,119 | +75 (+0.6%) | September 30, 2026 |
| 14 | Managed Profit Plus A | 0.07% | 10K | $140,200 | — | September 30, 2026 |
| 15 | Fidelity Nasdaq Composite Index | 0.06% | 9,294 | $130,302 | — | August 31, 2026 |
| 16 | GVC Gaesco Crossover - Glb Mo RV RF A FI | 0.05% | 6,890 | $96,598 | +6,890 (0.0%) | May 31, 2026 |
| 17 | Invesco NASDAQ Future Gen 200 ETF | 0.04% | 6,033 | $84,583 | — | September 30, 2026 |
| 18 | LUX IM Space & Defense AX | 0.04% | 5,522 | $77,418 | +5,522 (0.0%) | September 30, 2026 |
| 19 | State Street® SPDR® S&P® Intl Sm Cp ETF | 0.03% | 5,089 | $71,348 | — | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
ARQQ insider transactions
latest 6| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-06 | Andrew Leaver | Sell | $13.51 | 7,595 | $102,608 |
| 2026-04-02 | Ben Simon Wilder | Sell | $13.31 | 683 | $9,091 |
| 2026-04-02 | Garth Ritchie | Sell | $13.25 | 512 | $6,784 |
| 2026-04-02 | Nicholas Pointon | Sell | $13.32 | 1,709 | $22,764 |
| 2026-04-02 | Patrick Willcocks | Sell | $13.32 | 1,790 | $23,843 |
| 2026-04-02 | Paul Feenan | Sell | $13.32 | 1,632 | $21,738 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
ARQQ shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns ARQQ
Institutional investors own 82.6% of Arqit Quantum's shares and insiders 2.67%. The largest holder is Defiance ETFs, LLC with 33.80% of the shares (5.1M), as of June 30, 2026. Among the top 20 institutions, 15 added shares and 4 reduced their stake in the latest filings. Short interest is 17.79% of the float, or 6.12 days of average trading volume. The share count rose 545.2% since 2018.
Related: ARQQ analyst forecast, ARQQ key metrics. See the ARQQ stock overview for the latest quote and news.
ARQQ ownership FAQ
Who owns the most Arqit Quantum stock?
The largest shareholders of Arqit Quantum are Defiance ETFs, LLC (33.80%), Penserra Capital Management, LLC (33.68%), UBS Group AG (3.47%), Legal & General Group PLC (1.83%), NATIONAL BANK OF CANADA /FI/ (1.41%).
What percentage of Arqit Quantum is owned by institutions?
Institutions hold 82.6% of Arqit Quantum's shares outstanding; insiders hold 2.67%.
Which funds own Arqit Quantum?
The largest fund holders of Arqit Quantum are Global X Cybersecurity ETF (1.69%), Undly L&G Future World UK Eq Idx Fd (1.66%), VanEck Quantum Cmptg ETF A USD Acc (0.60%), Defiance Pure Quantum ETF (0.48%), Optimix Wereld Aandelen Fonds (0.23%).
What is Arqit Quantum's short interest?
2.3M shares of Arqit Quantum were sold short, 17.79% of the float; at the average daily volume it would take 6.12 days to cover.
Are insiders buying or selling Arqit Quantum?
Of the latest 6 reported insider transactions in Arqit Quantum (since April 2, 2026), 0 were purchases and 6 were sales.
How many shares of Arqit Quantum are outstanding?
Arqit Quantum has 17.4M shares outstanding, of which 5.0M are in the public float.