Quantinuum Raises $1.68 Billion in Upsized IPO, Closes Flat in Nasdaq Debut After Pricing Above Range at $60
Quantinuum, the quantum-computing company majority-owned by Honeywell, began trading on the Nasdaq Global Market on Thursday, June 4 under ticker QNT after pricing an upsized initial public offering of 28,000,000 Class A.
At a glance
- Quantinuum priced an upsized IPO of 28,000,000 Class A shares at $60.00 per share, above its $53–$55 range, raising $1.68 billion.
- Shares began trading June 4, 2026 on the Nasdaq Global Market under ticker QNT, opened at $68, hit a session high of $71.35, and closed little changed, for a market value of roughly $15.7 billion.
- The final prospectus (Form 424B4) was filed with the SEC; a June 1 S-1/A had earlier upsized the deal to 26.5 million shares at $53–$55.
- Quantinuum was formed in 2021 from Honeywell Quantum Solutions and Cambridge Quantum; Honeywell entities were expected to hold about 47.8% of combined voting power post-offering.
- J.P. Morgan and Morgan Stanley were lead active book-running managers.
VERDICT — CONFIRMED
Quantinuum, the quantum-computing company majority-owned by Honeywell, began trading on the Nasdaq Global Market on Thursday, June 4 under ticker QNT after pricing an upsized initial public offering of 28,000,000 Class A shares at $60.00 apiece — above its already-raised $53-to-$55 range — to raise $1.68 billion. The final prospectus, Form 424B4, hit SEC EDGAR following Wednesday evening's pricing. Shares opened at $68, touched a session high of $71.35, and closed little changed in the debut, bringing the company's market value to about $15.7 billion, per CNBC.
The deal had been upsized during marketing: a June 1 amendment lifted the offering to 26.5 million shares in a $53–$55 range before final terms expanded it further. Quantinuum was formed in 2021 through the combination of Honeywell Quantum Solutions and Cambridge Quantum; per the prospectus, Honeywell entities were expected to beneficially own approximately 47.8% of the combined voting power of the Class A and Class B common stock after the offering, with Honeywell continuing as a strategic customer and partner. J.P.
Morgan and Morgan Stanley acted as lead active book-running managers. The flotation kicked off a frenzied June listing window that also features SpaceX's record-seeking IPO and confidential filings from frontier AI labs.
Why it matters
the largest pure-play quantum-computing IPO to date hands public markets a live benchmark for quantum valuations just as the AI-era listing window swings wide open.
Key facts on file
- Quantinuum priced an upsized IPO of 28,000,000 Class A shares at $60.00 per share, above its $53–$55 range, raising $1.68 billion.
- Shares began trading June 4, 2026 on the Nasdaq Global Market under ticker QNT, opened at $68, hit a session high of $71.35, and closed little changed, for a market value of roughly $15.7 billion.
- The final prospectus (Form 424B4) was filed with the SEC; a June 1 S-1/A had earlier upsized the deal to 26.5 million shares at $53–$55.
- Quantinuum was formed in 2021 from Honeywell Quantum Solutions and Cambridge Quantum; Honeywell entities were expected to hold about 47.8% of combined voting power post-offering.
- J.P. Morgan and Morgan Stanley were lead active book-running managers.
