Quantinuum, the quantum-computing arm majority-owned by Honeywell International, will go public, the parent company announced Wednesday, swelling the thin ranks of pure-play quantum stocks.
At a Glance
- Quantinuum files for IPO; no date, share count or price range set
- Honeywell keeps majority control after the listing
- Move widens the still-small universe of publicly traded quantum companies
Why it matters: Investors gain a rare chance to own a stand-alone leader in the race to commercialize quantum computers.
Honeywell offered no timeline, sizing or valuation details for the planned offering, saying only that the registration statement with the Securities and Exchange Commission is imminent. The Charlotte-based industrial giant will retain majority ownership once the shares begin trading.
IPO Timing Remains Unclear
Management signaled the filing is “imminent” but stopped short of naming a launch window. Road-show schedules, pricing and the eventual exchange on which Quantinuum will list remain undecided, according to the company’s release.
Quantum Sector Gains Another Pure-Play Stock
The transaction will add Quantinuum to a short roster of publicly traded quantum specialists, giving growth investors a new vehicle that is not buried inside a diversified conglomerate. Honeywell signaled that it views the IPO as the next step toward scaling the business while still leveraging its balance-sheet strength and industrial relationships.

What Quantinuum Does
Quantinuum was formed in 2021 when Honeywell spun off its quantum division and merged it with Cambridge-based software firm CQC. The company builds trapped-ion hardware and writes quantum software for chemistry, cybersecurity and machine-learning applications.
Honeywell Keeps Majority Control
Despite the public float, Honeywell will continue to consolidate Quantinuum’s results and hold the majority of voting power, ensuring strategic alignment while opening access to equity markets.
Market Context
Quantum-computing stocks have traded with high volatility as investors weigh long-term promise against near-term revenue. Adding Quantinuum to the mix gives Wall Street another data point for valuing the emerging sector.
Key Takeaways
- Quantinuum is filing for an IPO under undisclosed terms
- Honeywell maintains majority ownership post-listing
- Deal enlarges the limited pool of pure-play quantum investments

