Quantum Cyber N.V.: which funds bought and sold

Institutions that bought and sold Quantum Cyber 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, 8 institutions that filed 13F reports for both quarters added to or opened positions in Quantum Cyber, and 9 cut or closed them. Together they sold a net 82K shares, −27.2% on what they held at the start of the quarter. 5 opened a new position and 4 sold out entirely.

Bought, Q2 2026 8 institutions, 5 of them new holders Sold, Q2 2026 9 institutions, 4 of them sold out

Net change, all compared −82K shares (−27.2%)

Net change, active managers 0 shares (—), 0 bought, 0 sold

Buyers versus sellers

institutions compared, 21

8 bought 4 9 sold

Active managers and hedge funds 0 bought · 0 sold · 0

Index fund managers 0 bought · 0 sold · 0

Other institutions 8 bought · 9 sold · −82K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Jane Street Group, LLC	+68K +425.5%	85K	$132,782
Virtu Financial LLC	+12K +42.4%	41K	$64,000
Morgan Stanley	+11K +5819.0%	11K	$17,564
Keystone Financial Group, Inc.	+5,300 New position	5,300	$8,321
Tower Research Capital LLC (TRC)	+4,000 New position	4,000	$6,280
Osaic Holdings, Inc.	+2,190 New position	2,190	$3,438
Lanark Financial, Inc.	+790 New position	790	$1,240
Citigroup Inc	+42 New position	42	$66

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
None of the active managers on our list.

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
UBS Group AG	−60K −69.8%	26K	$40,993
Xtx Topco Ltd	−53K −82.3%	11K	$17,884
Susquehanna International Group, LLP	−19K Sold out	0	—
Harbour Investments, Inc.	−16K Sold out	0	—
Two Sigma Securities, LLC	−13K Sold out	0	—
Sbi Securities Co., Ltd.	−10K −88.9%	1,289	$2,024
Steward Partners Investment Advisory, LLC	−10K −33.3%	20K	$31,400
Journey Advisory Group, LLC	−5,000 −33.3%	10K	$15,700
BNP Paribas Financial Markets	−600 Sold out	0	—

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
None of the active managers on our list.

New positions

largest by value

Institution	Shares	Value June 30, 2026
Keystone Financial Group, Inc.	5,300	$8,321
Tower Research Capital LLC (TRC)	4,000	$6,280
Osaic Holdings, Inc.	2,190	$3,438
Lanark Financial, Inc.	790	$1,240
Citigroup Inc	42	$66

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Susquehanna International Group, LLP	19K	$8,773
Harbour Investments, Inc.	16K	$7,453
Two Sigma Securities, LLC	13K	$6,071
BNP Paribas Financial Markets	600	$284

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 18
Ten largest holders: 97.3%
Index fund managers: 0.0%
Active managers and hedge funds: 0.0%

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	0	0	0	0	0	—
Index fund managers	0	0	0	0	0	—
Other institutions	8	9	5	4	−82K	−27.2%

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 Quantum Cyber.

Only managers that filed a holdings report for both quarters are compared (21 here). 1 other holder is 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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