Quantinuum, the quantum computing company majority-owned by Honeywell, has filed to go public in what would be the sector’s first major traditional IPO. The company is looking to raise up to approximately $1.05 billion through a Nasdaq listing under the ticker “QNT.”
The numbers behind the filing
Quantinuum submitted its Form S-1 registration statement to the SEC on approximately May 8, 2026. The company is targeting a valuation exceeding $20 billion, a figure that would represent a meaningful jump from its most recent private market pricing.
That last private round closed in September 2025, when Quantinuum raised $600 million at a $10 billion pre-money valuation. So the IPO is essentially asking public market investors to pay a premium of more than 2x what private backers paid less than a year ago.
J.P. Morgan and Morgan Stanley are running point as joint lead book-running managers.
