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Arqit Quantum Inc (ARQQ)

CUSIP: G0567U127 | 124 institutional holders

Quarters

Q3 2026Q2 2026Q1 2026Q4 2025Q3 2025
CompareDetailedHistoricalFundsOptions13D/13GPeersTargetingTrading SummaryProfile

Beneficial Ownership — 13D / 13G

Full history →

5%+ stakes reported outside the quarterly cycle. A 13D is due within five business days of the event below, so these figures lead the holders table until the filer's next 13F catches up to them.

HolderShares% of ClassChangeEvent Datevs 13F
13G/ANotion Capital III LP1,812,20610.0%New 5%+ stakeJun 26, 2026No 13F filer matched
13D/AManfredi Lefebvre d'Ovidio
with Heritage Assets SCSp, M Management S.A.
9,298,31438.6%

Institutional Holders — Q3 2026

Kessler Investment Group, LLC138,545
1.6% of portfolio›$3.3M
Banque Pictet & CIE SA36,000
0.0% of portfolio›$866.2K
SBI Securities Co., Ltd.28,508
0.0% of portfolio›$685.9K
Cambridge Investment Research Advisors, Inc.24,607
0.0% of portfolio›$592
Citigroup Inc17,353
0.0% of portfolio›$417.5K
Y.D. More Investments Ltd10,497
0.0% of portfolio›$252.6K
McGuire Investment Group, LLC9,148
0.0% of portfolio›$220.1K
Mirae Asset Global Investments Co., Ltd.4,874
0.0% of portfolio›$117.3K
Leonteq Securities AG4,070
0.0% of portfolio›$97.9K
US Bancorp \de\2,500
0.0% of portfolio›$60.2K
Simplex Trading, LLC2,387
0.0% of portfolio›$57.4K
Center for Financial Planning, Inc.956
0.0% of portfolio›$23.0K
Ascentis Wealth Management, LLC759
0.0% of portfolio›$18.3K
Signaturefd, LLC600
0.0% of portfolio›$14.4K
Farther Finance Advisors, LLC372
0.0% of portfolio›$9.0K
Parallel Advisors, LLC146
0.0% of portfolio›$3.5K
West Financial Advisors, LLC100
0.0% of portfolio›$2.4K
Parkside Financial Bank & Trust16
0.0% of portfolio›$385
CoreCap Advisors, LLC16
0.0% of portfolio›$385
Blue Trust, Inc.2
0.0% of portfolio›$38
TD Waterhouse Canada Inc.2
0.0% of portfolio›$47
StyleTurnoverLocationFiled
Kessler Investment Group, LLC
138,545$3.3M1.6%GrowthHighColumbus, IN2026-10-08
Banque Pictet & CIE SA
36,000$866.2K0.0%CoreMediumGeneva 73, Switzerland2026-10-16
SBI Securities Co., Ltd.
28,508$685.9K0.0%Agg GrowthLowTokyo, Mexico2026-10-22
Cambridge Investment Research Advisors, Inc.
24,607$5920.0%ETFLowFairfield, IA2026-11-02
Citigroup Inc
17,353$417.5K0.0%CoreMediumNew York, NY2026-11-04
Y.D. More Investments Ltd
10,497$252.6K0.0%Agg GrowthMediumRamat Gan, Luxembourg2026-11-02
McGuire Investment Group, LLC
9,148$220.1K0.0%Agg GrowthLowWakefield, RI2026-10-23
Mirae Asset Global Investments Co., Ltd.
4,874$117.3K0.0%GrowthLowSeoul, Malaysia2026-11-03
Leonteq Securities AG
4,070$97.9K0.0%CoreHighZurich, Switzerland2026-10-29
US Bancorp \de\
2,500$60.2K0.0%IndexLowMinneapolis, MN2026-11-05
Simplex Trading, LLC
2,387$57.4K0.0%CoreVery HighChicago, IL2026-11-04
Center for Financial Planning, Inc.
956$23.0K0.0%ETFLowSouthfied, MI2026-10-26
Ascentis Wealth Management, LLC
759$18.3K0.0%Agg GrowthLowDallas, TX2026-11-03
Signaturefd, LLC
600$14.4K0.0%IndexLowAtlanta, GA2026-10-23
Farther Finance Advisors, LLC
372$9.0K0.0%IndexLowSan Francisco, CA2026-10-08
Parallel Advisors, LLC
146$3.5K0.0%IndexLowSan Francisco, CA2026-11-03
West Financial Advisors, LLC
100$2.4K0.0%ETFLowDes Moines, IA2026-10-22
Parkside Financial Bank & Trust
16$3850.0%CoreVery LowSaint Louis, MO2026-10-27
CoreCap Advisors, LLC
16$3850.0%ETFMediumSouthfield, MI2026-10-08
Blue Trust, Inc.
2$380.0%ETFLowBrentwood, TN2026-10-15
TD Waterhouse Canada Inc.
2$470.0%CoreLowToronto, Australia2026-10-16
+26,173
May 21, 2026
No 13F filer matched
13G/ANotion Capital III LP1,812,206
10.0% of class · Jun 26, 2026New 5%+ stake
No 13F filer matched
13D/AManfredi Lefebvre d'Ovidio9,298,314
38.6% of class · May 21, 2026+26,173
with Heritage Assets SCSp, M Management S.A.
No 13F filer matched