Quantinuum prices IPO at $1.68B, setting quantum record

Quantinuum set a record with its initial public offering, pricing at $60 per share , above the already elevated marketed range of $53 to $55 , and raising $1.68 billion in a deal that redefines the financial benchmark for the entire quantum-computing sector.

The mechanics were straightforward but the signal was loud. Quantinuum sold 28 million shares, upsized from an initially planned 26.5 million, according to a source cited by Reuters. The pricing values the Honeywell-backed company at approximately $15.6 billion based on the share count in its filings. Trading begins Thursday on the Nasdaq under the ticker QNT, with JPMorgan and Morgan Stanley acting as lead underwriters.

The final tally caps a steady climb in ambition. Earlier targets had pegged the raise closer to an upsized $1.46 billion at a roughly $14.3 billion valuation, themselves an increase on the $12.7 billion the company had reportedly settled on after a $20 billion-plus figure circulated earlier. The $1.68 billion priced at $60 supersedes all those earlier marks; the read on the IPO has shifted as the book has firmed, and the latest number is the one that counts.

What investors are buying is more promise than revenue. Quantinuum reported about $31 million in 2025 revenue against a valuation now north of $15 billion, a ratio that makes the listing a wager on what the company will build rather than on what it currently sells.

Formed in 2021 from the merger of Honeywell’s quantum business and Cambridge Quantum, the company builds quantum computers aimed at problems classical machines would take impractically long to solve. It is working towards a fault-tolerant machine called Apollo, targeted for 2029.

Honeywell remains the anchor behind the company through the offering, expected to hold roughly 49% of the voting power afterwards, with founding shareholders Honeywell and Cambridge Quantum Holdings retaining around 82% of the equity between them.

The IPO is, on those numbers, as much a partial monetisation of an industrial conglomerate’s science bet as it is a debut for the quantum firm itself. The structure leaves Quantinuum with fresh public capital and Honeywell with a marked-to-market value on an asset it has held since the merger.

The significance runs past Quantinuum’s own balance sheet. This is the largest quantum-computing listing to date, making its pricing a reference point for a field that has been long on scientific milestones and short on public-market comparables.

Rivals already trading, and those weighing their own listings, now have a number to be valued against, and a demonstration that public investors will reach above the marketed range to own quantum exposure.

Whether the enthusiasm survives contact with quarterly reporting is the open question, and not one the pricing answers. A debut above range is a statement about demand on a single day.

Apollo is years out, revenue is modest, and the gap between a $15.6 billion valuation and a working fault-tolerant computer is exactly the distance the sector has spent a decade trying to close. For now, Quantinuum has set the bar. The trading starts Thursday.