Quantinuum prices upsized Nasdaq IPO at $60, worth $15.6B

Quantinuum, the Honeywell-backed quantum computing company, has priced its upsized initial public offering at $60 per share, above its already increased price range, and listed on the Nasdaq under the ticker QNT. The company sold 28 million shares of Class A common stock, raising approximately $1.68 billion in gross proceeds before fees and expenses. The deal followed an earlier upsizing from 21.05 million to 26.5 million shares and a price range lifted from $45–$50 to $53–$55, reflecting strong institutional demand for exposure to quantum computing.

At the $60 offer price and roughly 259.3 million shares outstanding, the IPO implied a fully diluted valuation of about $15.56 billion, placing Quantinuum among the most highly valued publicly traded quantum computing companies. The shares began trading on the Nasdaq Global Market on June 4, 2026, after the U.S. Securities and Exchange Commission declared the registration statement effective on June 3. Honeywell is expected to retain around 48% of the combined voting power following the offering, underscoring that the transaction is structured as a carve-out rather than a full spin-off.

The offering was led by J.P. Morgan and Morgan Stanley as joint lead active book-running managers, with Jefferies and Evercore ISI also acting as active bookrunners. Additional joint book-running managers included BofA Securities, UBS Investment Bank, Cantor, Mizuho, Needham & Company, Societe Generale, and TD Cowen, while Craig-Hallum and Rosenblatt served as co-managers. The underwriters received a 30-day option to purchase up to an additional 4.2 million shares at the IPO price to cover over-allotments. The transaction follows earlier private funding that valued Quantinuum at around $10 billion, highlighting a significant step-up in valuation as public market investors bet on the long-term commercial potential of full-stack quantum computing platforms.

Quantinuum positions itself as an integrated, full-stack quantum computing provider, combining hardware, software, and quantum cybersecurity capabilities. The company’s IPO comes amid increased U.S. government focus on quantum technologies, including a planned $2 billion equity program across several quantum firms, with Quantinuum slated to receive a minority equity investment of about $100 million. In this context, the successful Nasdaq debut and premium valuation signal growing public-market appetite for high-risk, long-horizon deep-tech plays, even as Quantinuum remains in the early stages of commercializing its technology and scaling revenue.