Horizon Quantum shares surge 16.89% premarket after SPAC merger with dMY and Nasdaq listing as HQ.

Horizon Quantum surged 16.89% in premarket trading following the completion of its business combination with dMY Squared Technology Group, a SPAC, and the announcement of its Nasdaq listing under the ticker “HQ” on March 20, 2026. The merger, approved by dMY shareholders on March 17, 2026, secured $120 million in gross proceeds to accelerate R&D, strengthen hardware testbeds, and advance its quantum software platform, Triple Alpha. The transaction values Horizon Quantum at $503 million and positions it to capitalize on quantum computing’s inflection point, as highlighted by CEO Dr. Joe Fitzsimons, who emphasized the company’s role in enabling broad quantum advantage through hardware-agnostic infrastructure. The Nasdaq listing and access to capital underscore investor confidence in Horizon Quantum’s strategic growth plans and leadership in quantum software development.