Lambert Danielle 4

What Happened

• Danielle Lambert, a director of Horizon Quantum Holdings Ltd. (HQ), is reported as the insider connected to an acquisition of 84,602 Class A ordinary shares on March 19, 2026. The shares were bought at $11.82 each for an aggregate purchase price of approximately $999,996. The shares were issued and sold to Penchant Family Holdings LLC pursuant to a subscription agreement executed March 6, 2026 and closed on March 19, 2026.
• This transaction is a purchase (acquisition) recorded through an affiliated entity rather than a direct open-market sale.

Key Details

• Transaction date and price: March 19, 2026 — 84,602 shares at $11.82 per share (total ≈ $999,996).
• Filing date: Form 4 filed March 25, 2026 (6 days after the transaction); this is later than the typical Section 16 reporting window of 2 business days.
• Shares owned after transaction: Not disclosed in this filing.
• Footnotes: F1 — subscription agreement with dMY Squared Technology Group, Inc.; shares were issued at closing of the business combination on March 19. F2 — Penchant Family Holdings LLC is controlled by Penchant Holdings, Inc., whose President is Danielle Lambert.
• Transaction code: P = Purchase (acquisition by an affiliated entity).

Context

• The shares were issued and sold to an affiliated LLC at closing of the company’s business combination (a corporate transaction), so this reflects an allocation to a controlled entity rather than an immediate open-market buy by the insider personally. Form 4 reports beneficial ownership/control relationships; it does not explain the insider’s motives.