Quantinuum Raises $1.68B in Historic IPO, Set to Shape Quantum Computing Space

Quantinuum, the quantum-computing company majority-owned by HON, priced its initial public offering at $60 per share, selling 28 million shares to raise about $1.68 billion. The pricing lands the company a post-IPO valuation near $15.6 billion, up sharply from the roughly $10 billion mark set in its September 2025 private funding round.

Formed in 2021 from the merger of Honeywell's quantum unit and Cambridge Quantum, Quantinuum will trade on the Nasdaq under the ticker QNT, with Honeywell retaining roughly 48% of voting power. The listing arrives alongside a newly announced $2 billion U.S. federal quantum initiative, from which Quantinuum is slated to receive about $100 million.

The debut sharpens the competitive and valuation backdrop for the small pool of public quantum names, including IONQ, D-Wave, and Rigetti, which have often traded as a single momentum basket. A large, Honeywell-backed pure play could pull institutional capital toward the category while raising the bar on the hardware roadmaps investors expect from rivals.