Over the past 12 months, Horizon Quantum Holdings insiders bought $999,996 of stock on the open market (84.6K shares) and made no open-market sales.
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Joseph Francis Fitzsimons | Chief Executive Officer | 19,744,585 | 0 | 19,744,585 | 94.1% | 24 Mar, 2026 |
| 2 | Harry L. You | Director, TenPercentOwner | 0 | 1,163,484 | 1,163,484 | 5.5% | 20 Mar, 2026 |
| 3 | Danielle Lambert | Director | 0 | 84,602 | 84,602 | 0.4% | 25 Mar, 2026 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 17 Aug, 2026 | Qian Yi Amanda Chew | Chief Product Officer | Acquired A | 17,857 | $0.00 | $0 | 17,857 | Direct |
| 19 Mar, 2026 | Si-Hui Tan | Chief Science Officer | Acquired A | 500,000 | — | — | 500,000 | Direct |
| 19 Mar, 2026 | Danielle Lambert | Director | Acquired P | 84,602 | $11.82 | $1,000.00K | 84,602 | Indirect |
| 19 Mar, 2026 | Greg Gould | Chief Financial Officer | Acquired A | 285,300 | — | — | 285,300 | Direct |
| 19 Mar, 2026 | Joseph Francis Fitzsimons | Chief Executive Officer | Acquired A | 19,744,585 | — | — | 19,744,585 | Direct |
| 19 Mar, 2026 | Harry L. You | Director, TenPercentOwner | Acquired A | 1,163,484 | — | — | 1,163,484 | Indirect |
| 19 Mar, 2026 | Harry L. You | Director, TenPercentOwner | Acquired A | 2,884,660 | — | — | 2,884,660 | Indirect |