HORIZON QUANTUM HOLDINGS LTD

Historical 13F Holders

Reported Value, Excluding Options

Total Shares Held, Excluding Options

Total Filers

Every filing for Y4000A102 since 12/18/2024, newest first.

Filer	% of Class	Shares	Form	Filed
Harry L. You 13D/A Amendment 1	7.4%	2,655,028	13D/A Amendment 1	11/5/2026 Event 11/3/2026
Harry L. You	7.4%	2,655,028
dMY Squared Sponsor, LLC	0%	0
Tencent Holdings Ltd 13G/A Amendment 1	11.1%	3,800,438	13G/A Amendment 1	8/14/2026 Event 6/30/2026
Tencent Holdings Ltd	11.1%	3,800,438
THL A12 Limited	11.1%	3,800,438
Peak XV Partners Seed Investment 13D	20.3%	6,468,999	13D	7/9/2026 Event 3/19/2026
Peak XV Partners Seed Investment	20.3%	6,468,999
Peak XV Partners Seed Fund I Ltd	20.3%	6,468,999
Peak XV Partners Principals Seed Fund I Ltd	20.3%	6,468,999
Peak XV Partners Seed Management I Ltd	20.3%	6,468,999
ICS Opportunities, Ltd. 13G	0.1%	20,632	13G	6/25/2026 Event 6/17/2026
ICS Opportunities, Ltd.	0.1%	17,500
Millennium Management LLC	0.1%	20,632
Millennium Group Management LLC	0.1%	20,632
Israel A. Englander	0.1%	20,632
IonQ, Inc. 13D	13.3%	4,230,118	13D	4/1/2026 Event 3/19/2026
Joseph Francis Fitzsimons 13D	38.3%	19,744,585	13D	3/31/2026 Event 3/19/2026
Tencent Holdings Ltd 13G	13.1%	4,175,570	13G	3/25/2026 Event 3/19/2026
Tencent Holdings Ltd	13.1%	4,175,570
THL A12 Limited	13.1%	4,175,570
Harry L. You 13D	11.8%	4,097,358	13D	3/20/2026 Event 3/19/2026
Harry L. You	11.8%	4,097,358
dMY Squared Sponsor, LLC	11.6%	4,048,144

Period	Filers	Shares, Excl. Options	Value, Excl. Options	Options Value
2026 Q3	8	298 k	$4.42M	$0
2026 Q2	34	19.4 M	$533M	$0
2026 Q1	17	2.44 M	$21.4M	$0