Horizon Quantum Clarifies Certain Information Regarding the Company

Horizon Quantum updates investors on its current share count and the duration of shareholder lock-up agreements following reports of possible data errors.

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SINGAPORE--(BUSINESS WIRE)-- Horizon Quantum Holdings Ltd. (Nasdaq: HQ) (“Horizon Quantum,” “Horizon,” or “the Company”), a pioneer of software infrastructure for quantum applications, today wishes to clarify certain information regarding the Company in light of concerns that there may have been incorrect information in the market for a period yesterday:

• Issued and Outstanding Common Equity. As of September 14, 2026, the Company had 34,811,740 Class A Ordinary Shares and 19,744,585 Class B Ordinary Shares issued and outstanding.
• Business Combination Lock-Up Agreements. The lock-up agreements entered into by certain shareholders of the Company in connection with the Company’s business combination with dMY Squared Technology Group, Inc. on March 19, 2026 (the “Business Combination”), do not expire until the earlier of (i) the date on which the Company completes a liquidation, merger, capital share exchange, reorganization or other similar transaction that results in all of the Company’s shareholders having the right to exchange their Class A Ordinary Shares for cash, securities or other property, and (ii) twenty four (24) months after the closing date of the Business Combination, or March 19, 2028, with the exception of one shareholder whose lockup expires eighteen (18) months after the closing date of the Business Combination, or September 19, 2027. To date, all lock-up agreements entered into in connection with the Business Combination are still in effect.

To the extent there are any questions regarding the foregoing information, investors are encouraged to submit enquiries to investors@horizonquantum.com.

View source version on businesswire.com: https://www.businesswire.com/news/home/20260915023971/en/

investors@horizonquantum.com

Source: Horizon Quantum Holdings Ltd.

Key Terms

lock-up agreements financial

A lock-up agreement is a contract that prevents company insiders—founders, employees, and early investors—from selling their shares for a set period after a public stock offering. It matters to investors because it keeps a large block of shares off the market temporarily; when the lock-up ends, those holders can sell and this increased supply can cause the stock price to fall, similar to a timed release that suddenly opens a valve.

business combination financial

A business combination happens when two or more companies join together to operate as one, like two friends merging their teams into a single group. This is important because it can change how companies grow, compete, and make money, often making them bigger and more powerful in the market.