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Insider · CIK 0002120880

Tan Si-Hui

Reports to the SEC for 1 company · SINGAPORE

Transactions

7

Companies

1

Filings

2

CIK

0002120880

Forms 4 and 5

Insider transactions

7 trades

Date	Company	Role	Code	Shares	Price	Value	Shares after
2026-09-12	HQHorizon Quantum Holdings Ltd.M Exercise/Conversion	Chief Science Officer	MExercise/Conversion	+5,728 sh	—	—	5,728
2026-09-12	HQHorizon Quantum Holdings Ltd.D Disposition to Issuer	Chief Science Officer	DDisposition to Issuer	−2,991 sh	$15.22	−$45.5K	2,737
2026-09-12	HQHorizon Quantum Holdings Ltd. · Restricted Stock UnitM Exercise/Conversion	Chief Science Officer	MExercise/Conversion	+5,728 sh	—	—	85,931
2026-08-20	HQHorizon Quantum Holdings Ltd.A Award	Chief Science Officer	AAward	+3,600 sh	—	—	3,600
2026-06-12	HQHorizon Quantum Holdings Ltd. · Restricted Stock UnitA Award	Chief Science Officer	AAward	+91.7K sh	—	—	91,659
2026-03-19	HQHorizon Quantum Holdings Ltd. · Stock Option (Right to Buy)A Award	Chief Science Officer	AAward	+500K sh	—	—	500,000
2026-03-19	HQHorizon Quantum Holdings Ltd. · Stock Option (Right to Buy)A Award	Chief Science Officer	AAward	+55K sh	—	—	55,000

Recent filings

2

Accepted (ET)
Sep 154
Tan Si-Hui0001213900-26-100280
SEC(opens sec.gov)
Mar 254
Tan Si-Hui0001213900-26-034087
SEC(opens sec.gov)

Companies

1

Horizon Quantum Holdings Ltd.Chief Science OfficerHQ

Address

C/O HORIZON QUANTUM HOLDINGS LTD. 29 MEDIA CIR. #05-22

SINGAPORE, 138565