While most of the IPO news of late has revolved around Elon Musk’s SpaceX, a much smaller company operating in a more niche space is also going public.
Quantinuum Inc, a quantum computing firm with an interesting origin story, is expected to make its stock market debut today.
The initial public offering will be closely watched by industry analysts and investors as the burgeoning technology continues to gain a foothold across industries and the government.
Here’s what you need to know about the Quantinuum IPO.
What is Quantinuum?
Quantinuum Inc is a quantum computing company headquartered in Broomfield, Colorado. The company was founded in 2021, but even then, it wasn’t an entirely new startup in the quantum computing space. That’s because Quantinuum Inc originated as a merger between two different existing quantum computer companies.
It was formed by joining the teams and assets of the United Kingdom’s Cambridge Quantum Computing and the quantum computing division of America’s Honeywell International Inc, both of which had existed independently since 2014.
While Honeywell focused primarily on quantum computing hardware, Cambridge Quantum specialized in software for quantum computing systems. The merger of the two units into Quantinuum in 2021 resulted in a company that aims to offer a full stack of quantum computing solutions, from hardware to software.
Today, Quantinuum’s hardware products include its System Model H1 and System Model H2 quantum computers, and its software products include encryption solution Quantum Origin and InQuanto, a software platform for running quantum chemistry simulations.
While widespread adoption of quantum computers is still seen as at least a decade away, their potential to solve vastly complex problems in seconds—when it would take today’s classical supercomputers thousands of years—offers great promise.
Many believe the tech could ultimately be more transformative than that of even the AI era we are living through right now.
Most recently, the U.S. government announced a $2 billion quantum computing funding initiative for nine quantum computing companies.
Under that initiative, Quantinuum Inc will receive $100 million “to address critical technology and manufacturing bottlenecks for scaling of fault-tolerant trapped-ion-based quantum computers, such as low-loss integrated photonics, and reliable optical components at trapped-ion critical wavelengths.”
When is Quantinuum’s IPO?
Quantinuum priced its shares yesterday. The stock is expected to list today (Thursday, June 4, 2026).
What is Quantinuum’s stock ticker?
Quantinuum shares will trade under the stock ticker “QNT.” They will list on the Nasdaq Global Market.
What is the IPO share price of QNT?
The initial public offering price for QNT shares is $60 per share.
As reported by Reuters, that’s a notable increase from the $53-$55 IPO price the company was initially targeting. Quantinuum raising its IPO price just ahead of the IPO suggests the company found that there was stronger-than-expected demand for its shares.
How many QNT shares are available in its IPO?
Quantinuum’s initial public offering saw 28 million of its Class A common stock shares go on sale. This, too, was higher than Quantinuum originally announced. As noted by Reuters, Quantinuum had initially said it planned on offering 26.5 million shares.
The increase in the number of shares ultimately made available again suggests Quantinuum saw signs of stronger-than-expected demand for its stock from investors.
In addition to the 28 million Class A common stock shares that went on sale, Quantinuum’s underwriters, which include J.P. Morgan and Morgan Stanley, have the option of buying an additional 4.2 million shares to cover over-allotments.
How much did Quantinuum raise in its IPO?
With 28 million shares sold at $60 apiece, Quantinuum raised $1.68 billion in its IPO.
How much is Quantinuum worth?
At its IPO price of $60 per share, Quantinuum is now worth $15.6 billion, notes CryptoBriefing.
Quantum computing stocks have had a volatile year
With Quantinuum becoming a publicly listed company today, it now joins the ranks of several other publicly traded quantum computing firms, including D-Wave (NYSE: QBTS), Rigetti (Nasdaq: RGTI), IonQ (NYSE: IONQ), and Quantum Computing Inc. (Nasdaq: QUBT), the so-called Quantum Four.
Those quantum stocks have been on a roller coaster for nearly two years now.
Beginning in late 2024, all four of those quantum computing stocks began to surge, with all hitting all-time highs in 2025 as the technology progressed and the promise of what quantum computers may one day deliver became more widely understood.
But shares in quantum computing companies are also notoriously volatile. It is not uncommon to see a swing of plus or minus 10% in any one of the big four quantum computing companies’ stock prices in a single day.
And year to date, 2026 has been a bit of a mixed bag for the Quantum Four.
As of yesterday’s close, the only standout of the Quantum Four has been IonQ, which was up more than 52% since the year began.
Quantum Computing Inc., D-Wave, and Rigetti were all up less than 10% for the year—but as mentioned, quantum computing stock prices can easily fluctuate by 10% in either direction on any given day.
And already this morning in premarket trading, shares in the Quantum Four are down significantly—again, something that is just par for the course for quantum computing stocks.
As of the time of this writing, RGTI and QBTS are down more than 4%, IONQ is down more than 5%, and QUBT is down nearly 3%.
Given that volatility, it will be interesting to see how Quantinuum shares perform when trading begins in just a few hours.