Insider · CIK 0002120880
Si-Hui Tan
Files at HQ (Horizon Quantum Holdings Ltd.). First filing -, latest -.
In brief
Si-Hui Tan files SEC Form 4 as officer at HQ (Horizon Quantum Holdings Ltd.). No open-market trade is on file; the transactions below are grants, exercises and other rows that carry no view on the price.
A track record needs three past buys with six months of prices behind them; Si-Hui Tan has 0, so none is measured yet.
Signals
This insider’s open-market buys and sells, scored.
Transactions
Every row this insider has filed, 7 in all, newest first.
| Date | Company | Transaction | Shares | Price | Value | Holdings after | Filed |
|---|---|---|---|---|---|---|---|
| Aug 20, 2026 | HQ Horizon Quantum Holdings Ltd. | AGrant or award Class A Ordinary Sharesindirect: By Spouse | +3,600 | $0.00 | $0 | 3,600 | 29 d ago |
| Sep 12, 2026 | HQ Horizon Quantum Holdings Ltd. | MOption exercise Class A Ordinary Shares | +5,728 | $0.00 | $0 | 5,728 | 29 d ago |
| Sep 12, 2026 | HQ Horizon Quantum Holdings Ltd. | DDisposition to issuer Class A Ordinary Shares | -2,991 | $15.22 | $46k | 2,737 | 29 d ago |
| Mar 19, 2026 | HQ Horizon Quantum Holdings Ltd. | AGrant or award Stock Option (Right to Buy)derivativeindirect: By Spouse | +55,000 | - | - | 55,000 | 29 d ago |
| Jun 12, 2026 | HQ Horizon Quantum Holdings Ltd. | AGrant or award Restricted Stock Unitderivative | +91,659 | $0.00 | $0 | 91,659 | 29 d ago |
| Sep 12, 2026 | HQ Horizon Quantum Holdings Ltd. | MOption exercise Restricted Stock Unitderivative | +5,728 | $0.00 | $0 | 85,931 | 29 d ago |
| Mar 19, 2026 | HQ Horizon Quantum Holdings Ltd. | AGrant or award Stock Option (Right to Buy)derivative | +500,000 | - | - | 500,000 | Mar 25, 2026 |
Questions about Si-Hui Tan
Answered from the filings on this page, as of the latest one.
Is Si-Hui Tan buying or selling?
Si-Hui Tan has no open-market buy or sell on SEC Form 4; the filings on record are grants, exercises and other transactions.
How did Si-Hui Tan's past buys perform?
Not measured yet. InsiderTell needs three past buys with six months of prices to publish a track record, and Si-Hui Tan has 0.
Where does Si-Hui Tan file Form 4?
Si-Hui Tan has filed Form 4 at HQ (Horizon Quantum Holdings Ltd.) as Chief Science Officer. A Form 4 is required of officers, directors and holders of more than 10% of a share class within two business days of a trade.
Not investment advice. Scores and forward returns are decision support built from public SEC filings and past prices; they describe what happened after comparable filings, not what will happen after this one. Do your own research and size your risk.