Best Quantum Computing Stocks to Watch in 2026: IONQ, QUBT, INFQ, QBTS, LAES

TLDR

• McKinsey projects the quantum computing market could reach $72 billion annually by 2035
• Infleqtion (INFQ) became the first neutral-atom quantum company to go public on Feb. 17, 2026
• Quantum Computing Inc. (QUBT) completed a $110 million acquisition of Luminar Semiconductor and raised $1.55 billion in 2025
• Sealsq Corp (LAES) is deploying post-quantum security chips to protect against future encryption-breaking threats
• IonQ (IONQ) and D-Wave Quantum (QBTS) remain top watchlist picks based on recent trading volume

The quantum computing sector is heating up in 2026. With new public listings, major acquisitions, and billions in fresh capital, investors are paying close attention to this emerging industry.

McKinsey estimates the quantum computing market could grow into a $72 billion annual opportunity by 2035. That’s a market that barely exists today.

For investors willing to take on risk, the potential rewards are substantial. But picking the right companies matters.

Here’s a look at the quantum computing stocks generating the most buzz right now.

The New Kid on the Block: Infleqtion

Infleqtion went public on Feb. 17, 2026. It became the first neutral-atom quantum company to trade on a major exchange.

The stock trades under the ticker INFQ. It closed recently at $11.21 with a market cap around $467 million.

So what makes neutral-atom technology different? Most quantum companies use either trapped ions or superconducting circuits that need extreme cooling. Infleqtion uses regular atoms held in place by laser beams.

The advantage here is scalability. Neutral atoms can be arranged in large, flexible arrays without the complex cooling infrastructure.

Infleqtion, Inc., INFQ

Infleqtion isn’t just building quantum computers either. The company sells quantum optical clocks, RF receivers, and inertial sensors.

These systems are already in use with NASA, the U.S. Department of Defense, and the U.K. government.

The company went public with more than $550 million in new funding. It also secured a $2 million U.S. Army contract for navigation systems and is working on a $6.2 million ARPA-E contract for energy grid optimization.

There’s even a partnership with Voyager Technologies to put a quantum atomic clock on the International Space Station. This company ships real hardware to real customers.

Quantum Computing Inc. Takes the Photonics Route

Quantum Computing Inc. trades under the ticker QUBT on NASDAQ. The stock recently traded at $7.72 with a market cap of $1.7 billion.

QCi takes a completely different approach from most quantum companies. Instead of superconducting circuits or trapped ions, it builds quantum systems using photonics.

That means manipulating particles of light rather than subatomic particles. The big advantage is that photonic quantum systems can operate at room temperature.

No massive, expensive cryogenic cooling required.

Quantum Computing, Inc., QUBT

In February 2026, QCi completed its $110 million all-cash acquisition of Luminar Semiconductor. This was a strategic supply chain move.

Luminar Semiconductor manufactures lasers, detectors, and advanced packaging. These are exactly the photonic components QCi needs to build compact, mass-producible quantum systems.

The company now controls the entire photonics signal chain from light generation through detection and processing.

QCi also raised $1.55 billion in capital during 2025. That’s an enormous financial cushion for a company this size.

The manufacturing platform is fully domestic. This positions QCi well for government and defense contracts as reshoring initiatives continue.

The company offers Dirac systems, which are portable, low-power quantum computers that operate at room temperature. It also sells quantum random number generators and quantum authentication solutions.

The Security Play: Sealsq Corp

Here’s a question most quantum investors aren’t asking. What happens to cybersecurity when quantum computers become powerful enough to break current encryption?

Every device connected to the internet becomes vulnerable. Sealsq Corp is building hardware to prevent that.

The stock trades under LAES on NASDAQ. It recently closed at $4.25 with a market cap around $784 million.

SEALSQ Corp, LAES

Sealsq specializes in post-quantum semiconductors. These are chips embedded with quantum-resistant cryptographic algorithms.

They’re designed to protect against “harvest-now, decrypt-later” attacks. That’s when adversaries collect encrypted data today with plans to decrypt it once quantum computers are powerful enough.

This is already happening.

In January 2026, the company confirmed active U.S. deployments of its post-quantum semiconductor-based trust anchors. This coincided with the official launch of the “Year of Quantum Security 2026” in Washington, D.C.

Sealsq products are deployed across multi-factor authentication tokens, smart energy systems, medical devices, defense infrastructure, and automotive applications.

The Established Players: IonQ and D-Wave

IonQ and D-Wave Quantum remain the most-watched quantum computing stocks based on recent trading volume.

IonQ trades under IONQ. The company develops general-purpose quantum computing systems and sells access to quantum computers of various qubit capacities.

Customers can access IonQ’s quantum computers through Amazon Web Services, Microsoft Azure Quantum, and Google Cloud Marketplace. The company also offers its own cloud service.

IonQ, Inc., IONQ

Recent earnings results have been strong. Analysts are noting that IonQ may be changing the quantum narrative with its latest quarterly performance.

D-Wave Quantum trades under QBTS. The company offers Advantage, its fifth-generation quantum computer.

D-Wave also provides Ocean, a suite of open-source Python tools, and Leap, a cloud-based service offering real-time access to live quantum computers.

D-Wave Quantum Inc., QBTS

The Leap platform includes access to hybrid solvers, development kits, demos, and learning resources.

Both companies represent more established plays in the quantum space. But they still carry the speculative nature common to the entire sector.

What Investors Should Know

All quantum computing stocks come with serious risks. These are speculative, long-horizon investments.

Technical challenges remain. Execution risk is high. Regulatory uncertainties exist.

Most of these companies trade on future expectations rather than current revenues. Quantum Computing Inc. reported a gross margin of negative 67,346% recently. That’s not a typo.

The potential upside is what draws investors in. If quantum advantage arrives and these companies are positioned correctly, returns could be exceptional.

But timing is uncertain. Commercial viability at scale remains years away for most applications.

For investors building a watchlist, the sector offers several different approaches to quantum technology. Neutral atoms, photonics, superconducting circuits, trapped ions, and post-quantum security all represent different bets on how this industry develops.

Recent Developments Worth Noting

Infleqtion has multiple collaborations with Nvidia. The partnership produced the world’s first demonstration of a materials science application using logical qubits.

Sealsq announced a partnership with Trusted Semiconductor Solutions. The deal supplies U.S. government and enterprise customers with post-quantum-ready semiconductor platforms.

QCi’s vertical integration strategy through the Luminar acquisition gives it control over manufacturing that competitors lack.

IonQ continues expanding cloud access partnerships with major tech providers.

D-Wave maintains a developer community through its Leap platform that helps drive adoption.

The quantum computing sector saw record capital inflows in 2025. That money is now being deployed across hardware development, acquisitions, and government contracts.

Trading volume in quantum stocks has increased as more investors add these names to their portfolios.

Sealsq confirmed active U.S. deployments of post-quantum security hardware in January 2026, marking a shift from development to commercial deployment.

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