Tan Si-Hui (CIK 2120880) reported 3 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-09-15). Recent activity: Buy HQ (3,600 shares), Buy HQ (5,728 shares), Sell HQ (2,991 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-15 | Horizon Quantum Holdings Ltd. (HQ) | Chief Science Officer | Buy | 3,600 | $0 |
| 2026-09-15 | Horizon Quantum Holdings Ltd. (HQ) | Chief Science Officer | Buy | 5,728 | $0 |
| 2026-09-15 | Horizon Quantum Holdings Ltd. (HQ) | Chief Science Officer | Sell | 2,991 | $45,523 |
Source: SEC Form 4 filings · as of 2026-09-15