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Horizon Quantum Computing Pte. Ltd., a fast-rising developer of quantum software, announced Tuesday it will go public through a $503 million merger with dMY Technology Group, a special purpose acquisition company (SPAC).

The transaction will create Horizon Quantum Holdings Ltd., with shares set to debut on the Nasdaq under ticker HQ, signaling a bold new chapter for the Singapore-based innovator.

Legal Teams Behind the Mega-Merger

The deal was constructed with the backing of four law firms. Ellenoff Grossman & Schole LLP and Rajah & Tann Singapore LLP advised Horizon Quantum, while White & Case LLP and TCF Law Group PLLC represented dMY.

The White & Case team was led by capital markets partners Joel Rubinstein, Jonathan Rochwarger, and Daniel Nussen, supported by specialists across mergers and acquisitions, antitrust, technology, data privacy, employment, and trade law. Horizon’s counsel was spearheaded by partner David Landau at Ellenoff Grossman & Schole.

Making Quantum Accessible to the Masses

Founded in 2018, Horizon Quantum says its mission is to simplify quantum software development by creating a hardware-agnostic platform that allows virtually any developer to build quantum applications without needing deep expertise in the field. The platform automates acceleration, bridges the gap between hardware and applications, and aims to unlock the full promise of quantum computing.

“Quantum computing hardware is advancing rapidly, but hardware alone won’t solve real-world problems,” said Joe Fitzsimons, Horizon’s CEO and founder. “By taking Horizon public now, we can accelerate our development and capitalize on breakthroughs shaping the industry.”

The SPAC Power Play

dMY, the blank-check vehicle leading the merger, is chaired by Harry You, a veteran in SPAC deals and tech leadership. SPACs are shell entities that raise money through IPOs to acquire private companies and take them public — a shortcut to Wall Street that has defined many high-growth tech entries.

“We believe application development is critical for quantum computing adoption,” You said. “The creation of a quantum operating system and full software stack is both technologically essential and a compelling investment opportunity.”

What’s Next

The boards of both companies have approved the merger, which is expected to close in the first quarter of 2026, pending shareholder and regulatory approval. Once finalized, the combined entity will aim to speed innovation while offering investors a front-row seat to the unfolding quantum revolution.