Quantinuum (Ticker: QNT US) is an American quantum computing systems and software developer incorporated in Delaware. The company offers a hardware-led, software-enhanced platform including quantum hardware, middleware, developer tools and applications for enterprise and government customers.

Quantinuum plans to list on NASDAQ on Thursday, June 4, 2026, with pricing expected after market close on Wednesday, June 3, 2026. According to updated published terms, Quantinuum has upsized its IPO to 26.5 million shares, up from 21.05 million shares, and raised the price range to $53.00 to $55.00 per share, up from $45.00 to $50.00. At the $54.00 midpoint, the IPO is expected to raise approximately $1.43 billion. The offering implies an estimated market capitalization of around $14.3 billion.

The IPO is structured as 100% primary shares, meaning proceeds are expected to go to the company. Quantinuum was formed in 2021 through the combination of Honeywell Quantum Solutions and Cambridge Quantum and remains a controlled affiliate of Honeywell, which is expected to remain a strategic customer and partner after the offering.