Quantinuum IPO Data, Price, Terms, and S-1
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The Quantinuum IPO date was Thursday, June 4th.
Read the S-1 filing here.
Participate in upcoming IPOs at Robinhood — a top broker for IPO access.*
Table of Contents
Notable Quantinuum News
06/04/2026: Quantinuum Closed the First Day of Trading Flat
06/03/2026: Quantinuum Ups IPO Offering Again, Prices at $60
06/01/2026: Quantinuum Ups IPO Offering See terms
05/26/2026: Quantinuum Sets IPO Terms
05/08/2026: Quantinuum has filed for an IPO
Older news…
About Quantinuum
Quantinuum (pronounced quan-tin-you-um) is a leading quantum computing company. Quantinuum emerged from a 2021 merger between Honeywell Quantum Solutions, who provided the hardware team, and Cambridge Quantum, who provided the software team.
Quantum computing companies develop new types of computers that use quantum mechanics, allowing them to solve problems much faster than regular computers.
They create both the hardware and software to use “qubits,” which can process multiple states at once, making them useful for complex tasks like secure communication and scientific research.
Quantum computing is in the early stages of development and has limited applications today. But the potential for quantum computing is estimated to be a trillion market.
Alphabet, IBM, PsiQuantum, and many other companies see the potential and are investing billions to make quantum computing viable.
Quantinuum has developed a roadmap for 2030 that enables fully fault-tolerant computing (low error rates) that would enhance the commercialization of its computing power.
Here’s a recent podcast episode highlighting Quantinuum:
IPO Terms
The Quantinuum IPO filing arrived on Friday, May 8th, and terms were updated on May 26th and June 1st.
- IPO Date: June 4th, 2026
- Ticker Symbol: QNT
- Stock Exchange: Nasdaq
- Common Stock Offered: 28,000,00 (upsized)
- Final IPO Price: $60 per share
- Raise: $1.68 billion
- Initial Price Range: $53-$55 per share
- Estimated Valuation: Up to $15.65 billion
- IPO Roadshow
- IPO Pricing Date: June 3rd, 2026
- Retail Access: Fidelity, ETRADE
- Lead Underwriters: JPMorgan, Morgan Stanley
Quantinuum S-1 Filing
Below is the May 8th version of the S-1 filing.
Visit the SEC website for the most recent filings.
Pre-IPO Ownership
Honeywell owns a 54% stake in Quantinuum, contributing $300 million in the company’s early stage. IBM Ventures invested an estimated $25 million in early 2022.
An August 2025 funding round raised $600 million from NVentures, QED Investors, and other new and existing investors.
A January 2024 funding round raised another $300 million and included strategic partners JPMorgan Chase, Mitsui & Co., and Amgen.
Other prominent VC investors include Fidelity, Samsung, Quantonation, Standard Chartered, Quanta Computer, Korea Investment Partners, and Consensys Mesh.
Pre-IPO Funding Rounds
| Round | Date | Est. Valuation | Raise Amount | Price |
|---|---|---|---|---|
| Series B | 09/04/25 | $10.00B | $600.00M | NA |
| Growth Equity | 01/2024 | $5.00B | $300.00M | NA |
| Growth Equity | 02/2022 | NA | $25.00M | NA |
| Seed | 11/2021 | NA | $300.00M | NA |
Pre-IPO Valuation
The latest confirmed Quantinuum valuation is $10 billion based on the August 2025 Series B funding round.
The IPO seeks to launch at up to a $14.5 billion market cap.
IPO Lead-up
The company released its S-1 filing on May 8th, 2026.
Bloomberg first reported of Quantinuum IPO plans in July 2024, saying the company was weighing an IPO at a $10 billion valuation.
The report indicated that Honeywell had held early discussions with multiple investment banks about a U.S. IPO.
Bookmark this page for the latest Quantinuum stock and IPO news.
How to Invest in Quantinuum Stock
Investors can purchase shares of Quantinuum stock from any online broker. Here’s a list that offer IPO access to customers.
Check out this list of best brokers for IPO investing to learn more about IPO access for retail investors.
Frequently Asked Questions (FAQs)
Is Quantinuum stock publicly traded?
Yes. The IPO date was June 4th, 2026.
What is the Quantinuum stock price?
What is the Quantinuum stock symbol?
The Quantinuum stock symbol is “QNT”.
Can you invest directly in Quantinuum stock today?
Yes.
How do you pronounce Quantinuum?
Quantinuum is pronounced “quan-tin-you-um”, with the accent on the second syllable.
The name is a portmanteau of quantum and continuum.
Quantinuum News Archive
04/22/2026: Quantinuum has filed Confidentially for an IPO
03/18/2026: Nitesh Sharan Joins Quantinuum as CFO
01/14/2025: Honeywell Announces Quantinuum IPO Plans
11/05/2025: Introducing Helios
11/05/2025: Fidelity Invests in Quantinuum
09/04/2025: Honeywell Announces $600 Million Capital Raise
08/20/2025: Quantinuum May Raise at $10 Billion Valuation
03/21/2025: Quantinuum CEO Says the Future Includes Nvidia
01/22/2025: Quantinuum Plans to Build R&D Center in New Mexico
12/17/2024: Honeywell’s quantum business could be worth $20 billion
09/10/2024: Quantinuum Unveils Roadmap Fault-Tolerant Quantum Computing by 2030
07/26/2024: Honeywell Weighs Quantinuum IPO at $10 Billion Valuation
01/16/2024: Quantinuum valued at $5 billion after fundraise
02/23/2022: IBM Invests in Honeywell/Cambridge Quantum Computing JV
11/30/2021: Introducing Quantinuum
Conclusion
Quantinuum is positioned to make significant strides in the computing industry. For investors, excitement is gaining steam as it could be an IPO candidate in 2025 or later.
Having established a roadmap targeting fault-tolerant quantum computing (e.g., improved reliability and redundancies) by 2030, Quantinuum has the potential to revolutionize healthcare, chemistry, mathematics, cryptology, and numerous other scientific fields.
Investors interested in owning Quantinuum stock can now buy it directly.
Craig Stephens founded Access IPOs in 2016 to help ordinary investors explore IPO and pre-IPO opportunities. He also manages the Access Club, a membership community for IPO and startup investors. Craig studied Finance at Michigan State University and lives in Northern Virginia. Learn more about Craig.
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