Arqit Quantum Inc.: which funds bought and sold

Institutions that bought and sold Arqit Quantum shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 39 institutions that filed 13F reports for both quarters added to or opened positions in Arqit Quantum, and 22 cut or closed them. Together they added a net 8.3M shares, +207.2% on what they held at the start of the quarter. Active managers and hedge funds on our list were net sellers of 29K shares (−21.7%); index fund managers were net buyers of 14K shares (+611.5%). 20 opened a new position and 11 sold out entirely.

Bought, Q2 2026 39 institutions, 20 of them new holders Sold, Q2 2026 22 institutions, 11 of them sold out

Net change, all compared +8.3M shares (+207.2%)

Net change, active managers −29K shares (−21.7%), 2 bought, 3 sold

Buyers versus sellers

institutions compared, 73

39 bought 12 22 sold

Active managers and hedge funds 2 bought · 3 sold · −29K

Index fund managers 2 bought · 0 sold · +14K

Other institutions 35 bought · 19 sold · +8.3M

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Defiance Etfs, LLC	+3.6M +251.1%	5.1M	$147M
Penserra Capital Management LLC	+3.6M +249.9%	5.1M	$151M
UBS Group AG	+437K +512.0%	523K	$15.5M
Legal & General Group PLC	+223K +424.3%	276K	$8.1M
National Bank Of Canada	+211K +19296.2%	212K	$6.3M
Bank Of New York Mellon Corp	+87K +732.3%	99K	$2.9M
Cetera Investment Advisers	+38K New position	38K	$1.1M
Bank Of America Corp	+35K +182.4%	54K	$1.6M
Raymond James Financial Inc	+31K +49.2%	95K	$2.8M
Kkm Financial LLC	+31K New position	31K	$537,779
Van Eck Associates Corp	+29K +145.6%	49K	$1.5M
Man Group PLC Hedge fund	+26K New position	26K	$778,961
Millennium Management LLC Hedge fund	+25K +45.7%	79K	$2.3M
LPL Financial LLC	+17K New position	17K	$508,479
Tidal Investments LLC	+16K New position	16K	$476,114
Simplex Trading, LLC	+11K New position	11K	$340,947
Zurcher Kantonalbank (Zurich Cantonalbank)	+11K +113.4%	21K	$632,917
Geode Capital Management, LLC Index funds	+9,294 New position	9,294	$276,217
HSBC Holdings PLC	+8,453 New position	8,453	$248,772
Heck Capital Advisors, LLC	+7,882 New position	7,882	$234,254

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Man Group PLC Hedge fund	+26K New position	26K	$778,961
Millennium Management LLC Hedge fund	+25K +45.7%	79K	$2.3M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Mirae Asset Global Etfs Holdings Ltd.	−136K −42.0%	188K	$5.6M
Renaissance Technologies LLC Hedge fund	−41K Sold out	0	—
Tudor Investment Corp Et Al Hedge fund	−38K Sold out	0	—
Jane Street Group, LLC	−33K Sold out	0	—
Headlands Technologies LLC	−12K Sold out	0	—
Stonehage Fleming Financial Services Holdings Ltd	−12K Sold out	0	—
Kessler Investment Group, LLC	−4,464 −2.8%	153K	$4.6M
Mirae Asset Global Investments Co., Ltd.	−2,402 −41.1%	3,444	$102,356
Allworth Financial LP	−1,000 Sold out	0	—
Sbi Securities Co., Ltd.	−974 −3.6%	26K	$776,732
Ifp Advisors, Inc	−940 −83.6%	185	$5,498
Group One Trading LLC	−774 −5.8%	13K	$376,909
Federation Des Caisses Desjardins Du Quebec	−696 Sold out	0	—
Quantbot Technologies LP Hedge fund	−444 Sold out	0	—
Leonteq Securities AG	−225 −13.0%	1,500	$44,580
Mai Capital Management	−200 Sold out	0	—
Parallel Advisors, LLC	−140 −53.4%	122	$3,640
Us Bancorp	−100 −74.1%	35	$1,040
Basecamp Wealth Advisors LLC	−38 Sold out	0	—
Cornerstone Financial Management LLC	−14 −35.9%	25	$743

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Value
Renaissance Technologies LLC Hedge fund	−41K Sold out	—
Tudor Investment Corp Et Al Hedge fund	−38K Sold out	—
Quantbot Technologies LP Hedge fund	−444 Sold out	—

New positions

largest by value

Institution	Shares	Value June 30, 2026
Cetera Investment Advisers	38K	$1.1M
Man Group PLCHedge fund	26K	$778,961
Kkm Financial LLC	31K	$537,779
LPL Financial LLC	17K	$508,479
Tidal Investments LLC	16K	$476,114
Simplex Trading, LLC	11K	$340,947
Geode Capital Management, LLCIndex funds	9,294	$276,217
HSBC Holdings PLC	8,453	$248,772
Heck Capital Advisors, LLC	7,882	$234,254
Goldman Sachs Group Inc	7,293	$216,748

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Renaissance Technologies LLCHedge fund	41K	$548,550
Tudor Investment Corp Et AlHedge fund	38K	$504,414
Jane Street Group, LLC	33K	$439,887
Headlands Technologies LLC	12K	$163,253
Stonehage Fleming Financial Services Holdings Ltd	12K	$152,746
Allworth Financial LP	1,000	$13,250
Federation Des Caisses Desjardins Du Quebec	696	$9,222
Quantbot Technologies LPHedge fund	444	$5,883
Mai Capital Management	200	$2,650
Basecamp Wealth Advisors LLC	38	$504

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 62
Ten largest holders: 96.0%
Index fund managers: 0.1%
Active managers and hedge funds: 0.9%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	2	3	1	3	−29K	−21.7%
Index fund managers	2	0	1	0	+14K	+611.5%
Other institutions	35	19	18	8	+8.3M	+214.9%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on Arqit Quantum.

Only managers that filed a holdings report for both quarters are compared (73 here). 3 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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