Tan Si-Hui
SEC insider (Form 3/4/5 filer). CIK 0002120880. Chief Science Officer at Horizon Quantum Holdings Ltd. (HQ). 6 reported Form 4/5 transactions since Sep 2024; latest on Sep 12, 2026. Located in SINGAPORE.
Companies Tan Si-Hui has filed insider reports for
- Horizon Quantum Holdings Ltd. (HQ): Officer, Chief Science Officer
Tan Si-Hui
CIK: 0002120880
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Companies & Roles (1)
Horizon Quantum Holdings Ltd.
Discretionary Trading P&L
Holdings
Transaction History (6 total)
- Sep 12, 2026HQ
Horizon Quantum Holdings Ltd.
ExerciseDirect5.7K shares- - Sep 12, 2026HQ
Horizon Quantum Holdings Ltd.
DispositionDirect3K shares at avg. $15.22$46K - Aug 20, 2026HQ
Horizon Quantum Holdings Ltd.
AwardIndirect3.6K shares- - Jun 12, 2026HQ
Horizon Quantum Holdings Ltd.
AwardDirectRestricted Stock Unit
91.7K shares- - Mar 19, 2026HQ
Horizon Quantum Holdings Ltd.
AwardIndirectStock Option (Right to Buy)
55K shares- - Mar 19, 2026HQ
Horizon Quantum Holdings Ltd.
AwardDirectStock Option (Right to Buy)
500K shares-
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Sep 12, 2026 | HQ Horizon Quantum Holdings Ltd. | Exercise | 5,728 | - | $0 | Direct |
| Sep 12, 2026 | HQ Horizon Quantum Holdings Ltd. | Disposition | 2,991 | $15.22 | $45,523 | Direct |
| Aug 20, 2026 | HQ Horizon Quantum Holdings Ltd. | Award | 3,600 | - | $0 | Indirect |
| Jun 12, 2026 | HQ Horizon Quantum Holdings Ltd. | Award Restricted Stock Unit | 91,659 | - | - | Direct |
| Mar 19, 2026 | HQ Horizon Quantum Holdings Ltd. | Award Stock Option (Right to Buy) | 55,000 | - | - | Indirect |
| Mar 19, 2026 | HQ Horizon Quantum Holdings Ltd. | Award Stock Option (Right to Buy) | 500,000 | - | - | Direct |
1-6 of 6 transactions