Horizon Quantum Holdings Pte LTD

Qian Yi Amanda Chew, Chief Product Officer of Horizon Quantum Holdings Pte. Ltd., received 17,857 shares of common stock on August 17, 2026.

Catherine Michele Fitzsimons, CL and CO of Horizon Quantum Holdings Pte. Ltd., reported multiple transactions in common stock on June 12, 2026.

Greg Gould, Chief Financial Officer of Horizon Quantum Holdings Pte. Ltd., reported multiple transactions in common stock on June 12, 2026.

Si-Hui Tan, Chief Science Officer of Horizon Quantum Holdings Pte. Ltd., reported multiple transactions in common stock on March 19, 2026.

Joseph Francis Fitzsimons, Chief Executive Officer, a Director and 10% owner of Horizon Quantum Holdings Pte. Ltd., reported multiple transactions in common stock on June 12, 2026.

Horizon Quantum Holdings Director Danielle Lambert acquired 84,602 Class A Ordinary Shares for approximately $1 million through Penchant Family Holdings LLC following the company's business combination.

Peak XV Partners entities collectively hold a 20.3% stake in Horizon Quantum Holdings Ltd. following a business combination.

Quantum computing firm IonQ has disclosed a significant 13.3% beneficial ownership stake in Horizon Quantum Holdings Ltd. following a strategic investment tied to Horizon's recent De-SPAC transaction.

Horizon Quantum Holdings Ltd. filed a Schedule 13D detailing CEO Joseph Fitzsimons' 38.3% beneficial ownership and an indemnification agreement protecting him as a director and officer.

Harry L. You and dMY Squared Sponsor, LLC report significant beneficial ownership in Horizon Quantum Holdings Ltd. following a completed business combination.

Tencent Holdings Ltd. and its subsidiary THL A12 Limited have reported an increased beneficial ownership of Horizon Quantum Holdings Ltd.'s Class A Ordinary Shares, now holding 11.1% of the outstanding shares.

Millennium Management and affiliates report a reduction in their beneficial ownership of Horizon Quantum Holdings Ltd. shares to below the 5% threshold.

Tencent Holdings Limited and its subsidiary THL A12 Limited have disclosed a 13.1% beneficial ownership stake in Horizon Quantum Holdings Ltd.'s Class A Ordinary Shares.