Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in ARQQ held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | Defiance ETFs, LLC | 1.5M | $19.2M | +5.3% | 9.279% | 0.28% |
| 2 | MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 324K | $4.3M | +7.5% | 2.072% | 0.01% |
| 3 | Kessler Investment Group, LLC | 158K | $2.1M | +229.3% | 1.007% | 0.99% |
| 4 | UBS Group AG | 85K | $1.1M | -42.0% | 0.546% | 0.00% |
| 5 | RAYMOND JAMES FINANCIAL INC | 64K | $846K | +0.9% | 0.408% | 0.00% |
| 6 | MILLENNIUM MANAGEMENT LLC | 54K | $716K | — | 0.345% | 0.00% |
| 7 | Legal & General Group Plc | 53K | $699K | -20.5% | 0.336% | 0.00% |
| 8 | RENAISSANCE TECHNOLOGIES LLC | 41K | $549K | — | 0.265% | 0.00% |
| 9 | TUDOR INVESTMENT CORP ET AL | 38K | $504K | — | 0.243% | 0.00% |
| 10 | BANQUE PICTET & CIE SA | 36K | $477K | 0.0% | 0.230% | 0.00% |
| 11 | SBI Securities Co., Ltd. | 27K | $359K | -12.8% | 0.173% | 0.01% |
| 12 | Advisory Services Network, LLC | 22K | $288K | +9.0% | 0.139% | 0.00% |
| 13 | BANK OF AMERICA CORP /DE/ | 19K | $254K | -1.6% | 0.123% | 0.00% |
| 14 | WELLS FARGO & COMPANY/MN | 15K | $200K | +48.0% | 0.096% | 0.00% |
| 15 | True Vision MN LLC | 15K | $197K | — | 0.095% | 0.10% |
| 16 | GROUP ONE TRADING, L.P. | 13K | $178K | -14.8% | 0.086% | 0.01% |
| 17 | Headlands Technologies LLC | 12K | $163K | — | 0.079% | 0.02% |
| 18 | Bank of New York Mellon Corp | 12K | $158K | -37.2% | 0.076% | 0.00% |
| 19 | Stonehage Fleming Financial Services Holdings Ltd | 12K | $153K | 0.0% | 0.074% | 0.01% |
| 20 | Zurcher Kantonalbank (Zurich Cantonalbank) | 10K | $132K | +41.8% | 0.064% | 0.00% |
| 21 | CITIGROUP INC | 10K | $130K | -47.8% | 0.063% | 0.00% |
| 22 | MORGAN STANLEY | 9K | $124K | -6.6% | 0.060% | 0.00% |
| 23 | ROYAL BANK OF CANADA | 7K | $92K | +133.4% | 0.045% | 0.00% |
| 24 | Mirae Asset Global Investments Co., Ltd. | 6K | $77K | +16.5% | 0.037% | 0.00% |
| 25 | JONES FINANCIAL COMPANIES LLLP | 3K | $40K | +4.0% | 0.022% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in ARQQ — a direct measure of their conviction.
Filings activity in ARQQ during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 55 | 3.5% | 15.65% | 11.93 pp | $33M | 43% |
| Q4 2025 | 57 | +7.5% | 27.58% | +7.72 pp | $59M | +39% |
| Q3 2025 | 53 | +23% | 19.86% | +5.97 pp | $42M | +43% |
| Q2 2025 | 43 | +39% | 13.89% | +11.19 pp | $30M | +414% |
| Q1 2025 | 31 | +0.0% | 2.70% | 2.86 pp | $6M | 51% |
| Q4 2024 | 31 | +121% | 5.56% | +5.44 pp | $12M | +4504% |
| Q3 2024 | 14 | 46% | 0.12% | 0.28 pp | $0M | 70% |
| Q2 2024 | 26 | — | 0.40% | — | $1M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying ARQQ stock.
Based on Q1 2026 13F filings, institutional ownership of Arqit Quantum Inc. stands at 15.7%, held across 55 reporting institutions.
Defiance ETFs, LLC is the largest reported institutional holder of ARQQ, with approximately 1,452,311 shares worth $0.02B as of Q1 2026.
Yes — 2 widely-followed marquee investors appear among the top 25 institutional holders of ARQQ, including MILLENNIUM MANAGEMENT LLC, RENAISSANCE TECHNOLOGIES LLC.
Our composite Smart Money Score for ARQQ is 40 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
12 institutions opened new positions in ARQQ during Q1 2026, while 14 fully exited. 6 added to existing positions and 37 trimmed.
ARQQ institutional ownership fell by 11.93 percentage points quarter-over-quarter, with a net change of -2 holders.
The top 10 institutions account for 91.7% of all reported 13F value in ARQQ, and the top 25 account for 99.4%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Arqit Quantum Inc. (ARQQ) Institutional Ownership