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Quantum Computing Goes Public: Honeywell Spin-Off Quantinuum Raises $1.68 Billion in Landmark Nasdaq IPO

Quantinuum, the quantum computing company formed from the merger of Honeywell Quantum Solutions and Cambridge Quantum, raised $1.68 billion in its initial public offering on the Nasdaq on June 4, 2026, under the ticker symbol QNT. The company sold 28 million shares at $60 each -- above the top of its original target range -- valuing it at approximately $14 to $15 billion. It is the largest pure-play quantum computing company ever to go public and uses trapped-ion technology that the company says delivers the highest gate accuracy in the industry.