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Horizon Quantum Holdings Ltd. SEC filings

Services-Computer Programming Services · Nasdaq, Nasdaq · Incorporated in Singapore

On the radar right now · 1

Nov 5, 6:28 PM ET

Horizon Quantum Holdings Ltd.HQ

5%+ stake, may push for changes (13D) · amendment · filed by You Harry L.

Filing history

2026-11-05

5%+ stake update (13D) SCHEDULE 13D/A

2026-11-05

Insider trade 4

2026-11-05

Foreign company report 6-K

2026-10-21

Insider trade 4

2026-09-16

Insider trade 4

2026-09-15

Insider trade 4

2026-09-15

Insider trade 4

2026-09-15

Insider trade 4

2026-09-15

Insider trade 4

2026-08-14

Passive 5%+ stake update SCHEDULE 13G/A

2026-08-10

New insider's holdings 3

2026-08-04

Foreign company report 6-K

2026-08-04

Foreign company report 6-K

2026-08-03

Foreign company report 6-K

2026-07-09

5%+ stake, may push for changes SCHEDULE 13D

2026-06-25

Passive 5%+ stake SCHEDULE 13G

2026-05-28

Employee stock plan shares S-8

2026-05-11

New insider's holdings 3

2026-05-05

Foreign company report 6-K

2026-05-04

Foreign company report 6-K

2026-04-24

Prospectus 424B3

2026-04-23

EFFECT EFFECT

2026-04-21

CORRESP CORRESP

2026-04-21

AW AW

2026-04-20

UPLOAD UPLOAD

2026-04-16

F-1 F-1

2026-04-16

Foreign company report 6-K

2026-04-14

POS AM POS AM

2026-04-14

Foreign annual report 20-F

2026-04-09

Foreign company report 6-K

2026-04-02

New insider's holdings 3

2026-04-01

5%+ stake, may push for changes SCHEDULE 13D

2026-03-31

5%+ stake, may push for changes SCHEDULE 13D

2026-03-25

Insider trade 4

2026-03-25

Insider trade 4

2026-03-25

Insider trade 4

2026-03-25

Foreign annual report 20-F

2026-03-25

Passive 5%+ stake SCHEDULE 13G

2026-03-24

Insider trade 4

2026-03-20

5%+ stake, may push for changes SCHEDULE 13D