Quantinuum Files for $12.7 Billion IPO as Quantum Computing Investment Surges

Quantinuum filed for an initial public offering Tuesday that would value the quantum computing company at $12.7 billion, the largest IPO in the quantum computing sector to date.

The company, a joint venture between Honeywell and Cambridge Quantum, plans to list on the Nasdaq under the ticker QTUM. It expects to raise approximately $800 million in the offering.

Quantinuum makes quantum computers based on trapped-ion technology, which the company says produces fewer errors than competing approaches. Its systems are used by pharmaceutical companies, financial institutions, and defense contractors for complex optimization and simulation problems.

Revenue grew 47 percent last year to $312 million, though the company remains unprofitable. The IPO prospectus projects profitability by 2028.

The filing comes as quantum computing investment has accelerated sharply. Terra Quantum, a Swiss competitor, announced a $3.5 billion SPAC deal the same week. IBM and Google have both announced major milestones in quantum error correction this year.

"We are at the beginning of the quantum era," said Quantinuum CEO Rajeeb Hazra. "The companies that build the infrastructure now will define the next decade of computing."

Analysts say the IPO will test investor appetite for quantum computing companies, which have long promised transformative capabilities but have struggled to demonstrate commercial scale.