Tan Si-Hui bought HQ
September 12, 2026 · Form 4 insider transaction
Tan Si-Hui bought 5,728 shares of Horizon Quantum Holdings Ltd. at $0.00 per share, a transaction worth N/A. The trade was recorded as option exercise and disclosed on an SEC Form 4, filed 3 days after the transaction.
Direction
Acquired (buy-side)
Shares
5,728
Price
$0.00
Total value
N/A
InsiderTan Si-Hui
Role—
SecurityClass A Ordinary Shares
Transaction codeM: Option exercise
Transaction dateSeptember 12, 2026
Filing dateSeptember 15, 2026
Shares owned after5,728
OwnershipDirect
10b5-1 planNo
AmendedNo
Footnotes
On September 12, 2026, 5,728 of Dr. Tan's RSU's vested.; On June 12, 2026 (the "June Grant Date"), Dr. Tan was granted a total of 91,659 unvested RSUs. The RSUs granted to Dr. Tan vest in sixteen approximately equal installments on successive quarterly anniversaries of the June Grant Date and are subject to Dr. Tan's continued employment with the Company through each applicable vesting date.