HQ insider trading — Horizon Quantum Holdings Ltd.
No open-market insider purchases or sales were filed for Horizon Quantum Holdings Ltd. (HQ) in the last 90 days. Other insider transactions — such as stock awards, option exercises or tax withholding — are listed below.
Updated Oct 16, 2026.
Recent HQ insider transactions
Every Form 4 filed by Horizon Quantum Holdings Ltd. officers, directors and 10% owners in the last 90 days, newest first. P = open-market purchase, S = open-market sale; other codes are awards, option exercises, tax withholding or gifts.
| Trade date | Insider | Role | Type | Ownership | Shares | Price | Value | Filing |
|---|---|---|---|---|---|---|---|---|
| Sep 12, 2026 | Fitzsimons Catherine Michele | CL and CO | M · Option exercise | Direct | 2,148 | — | — | Form 4 |
| Sep 12, 2026 | Fitzsimons Catherine Michele | CL and CO | D · Disposition | Direct | 1,122 | $15.22 | $17K | Form 4 |
| Sep 12, 2026 | Tan Si-Hui | Chief Science Officer | M · Option exercise | Direct | 5,728 | — | — | Form 4 |
| Sep 12, 2026 | Tan Si-Hui | Chief Science Officer | D · Disposition | Direct | 2,991 | $15.22 | $46K | Form 4 |
| Sep 12, 2026 | Gould Greg | Chief Financial Officer | M · Option exercise | Direct | 3,437 | — | — | Form 4 |
| Sep 12, 2026 | Gould Greg | Chief Financial Officer | D · Disposition | Direct | 1,272 | $15.22 | $19K | Form 4 |
| Aug 20, 2026 | Tan Si-Hui | Chief Science Officer | A · Grant/award | Indirect | 3,600 | — | — | Form 4 |
| Sep 12, 2026 | Fitzsimons Joseph Francis | Chief Executive Officer | M · Option exercise | Direct | 14,321 | — | — | Form 4 |
| Sep 12, 2026 | Fitzsimons Joseph Francis | Chief Executive Officer | D · Disposition | Direct | 3,438 | $15.22 | $52K | Form 4 |
HQ insider trading FAQ
Are insiders buying HQ stock?
Not on the open market. In the last 90 days, Horizon Quantum Holdings Ltd. insiders made no open-market purchases, and no open-market sales. Purchases with the insider's own money are generally seen as a stronger signal than sales, which happen for many reasons (taxes, diversification, planned 10b5-1 sales).
Who are the insiders trading HQ?
No insider bought or sold on the open market in the last 90 days.
Where does HQ insider trading data come from?
Every transaction comes from SEC Form 4 filings on EDGAR. Company officers, directors and 10% owners must file a Form 4 within two business days of buying or selling. InsiderBolt reads these filings directly from the SEC.
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Insider trading data is for informational purposes only and is not investment advice. Filings can be amended; always confirm details on SEC EDGAR.