12 stocks in the theme · theme 1-month -3.1% · as of 2026-06-10
The Quantum Computing theme spans 12 US-listed companies; its largest names pulled back -3.1% over the past month. Companies developing quantum hardware, software, algorithms, or cloud quantum services
Below are the 10 largest Quantum Computing stocks by market capitalization, led by IONQ (IonQ, Inc.) at $26.9B. Each is shown with its 1-month, 3-month, and year-to-date performance, relative-strength rank, and recent price action — a snapshot of where the money and momentum sit in the theme today.
These are the recognizable leaders, not micro-cap lottery tickets: ranking by market cap surfaces the companies with the scale, liquidity, and institutional ownership to actually represent the theme. Use the relative-strength column to separate the names outperforming the broad market from those just along for the ride.
IonQ Inc sells access to several quantum computers of various qubit capacities and is in the process of researching and developing technologies for quantum computers with increasing computational capabilities. The company currently makes access to its quantum computers available…
IONQ (IonQ, Inc.) is a $26.9B name. Within the theme it sits in the Quantum Cloud & QCaaS sub-group. The past month has been quiet — -0.5%. An RS rank of 82 puts it among the market's leaders. Over longer windows it's +65.2% in three months and +21.1% year-to-date.
#2. QBTS — D-Wave Quantum Inc. · $11.2B
Software · Cloud Solutions — Emerging Technology Var · Public since 2022
D-Wave Quantum Inc is in the development and delivery of quantum computing systems, software, and services, and it is the commercial supplier of quantum computers and the only company building both annealing quantum computers and gate-model quantum computers. It delivers…
QBTS (D-Wave Quantum Inc.) carries a $11.2B valuation. Within the theme it sits in the Quantum Hardware & Processors sub-group. It's roughly flat over the past month (-3.2%). An RS rank of 76 is middling — neither leader nor laggard. Over longer windows it's +23.0% in three months and -17.3% year-to-date.
#3. RGTI — Rigetti Computing, Inc. Common Stock · $8.5B
Software · Cloud Solutions — Emerging Technology Var · Public since 2022
Rigetti Computing Inc builds quantum computers and the superconducting quantum processors that power them. The Company sells 9-qubit to 108-qubit quantum computing systems under the Novera and Cepheus trade names. Through the Rigetti Quantum Cloud Services (QCS) platform, the…
RGTI (Rigetti Computing, Inc. Common Stock) commands a $8.5B market cap. Within the theme it sits in the Quantum Hardware & Processors sub-group. It's down -5.2% over the past month, lagging the theme's leaders. With RS at 90, it's outperforming the broad tape. Over longer windows it's +14.8% in three months and -17.6% year-to-date.
#4. XNDU — Xanadu Quantum Technologies Limited Class B Subordinate Voting Shares · $4.8B
Software · Algorithm Services — Computing Optimization · Public since 2026
Xanadu Quantum Technologies Ltd specializes in designing photonic devices and the platforms around them, including the experimentation and development of quantum computers available on the cloud with supporting software, along with quantum simulators and other related products…
XNDU (Xanadu Quantum Technologies Limited Class B Subordinate Voting Shares) is a $4.8B name. Within the theme it sits in the Quantum Hardware & Processors sub-group. A -20.4% one-month move has it out of favor for now. Relative strength is weak at 0; it's lagging the market. Over longer windows it's — in three months and +2.3% year-to-date.
#5. INFQ — Infleqtion, Inc. · $3.5B
Software · Algorithm Services — Computing Optimization · Public since 2026
Infleqtion Inc developing and commercializing quantum technology products as part of a full-stack platform, which currently includes offerings such as quantum sensing, quantum computing, and software. Its quantum-enabled solutions are focused on addressing the world's pressing…
INFQ (Infleqtion, Inc.) commands a $3.5B market cap. Within the theme it sits in the Quantum Hardware & Processors sub-group. The stock is up +5.8% over the past month — clear momentum. An RS rank of 0 flags relative underperformance. Over longer windows it's +18.8% in three months and -12.9% year-to-date.
#6. QUBT — Quantum Computing Inc. Common · $2.7B
Software · Data Analytics — AI-Powered Decision Platforms · Public since 2004
Quantum Computing Inc is an integrated photonics and non-linear quantum optics company to develop and deliver machines for quantum computing, reservoir computing, and remote sensing, imaging, and cybersecurity applications based on patented and proprietary photonics technology.…
QUBT (Quantum Computing Inc. Common) commands a $2.7B market cap. Within the theme it sits in the Quantum Hardware & Processors sub-group. It's down -6.4% over the past month, lagging the theme's leaders. An RS rank of 29 flags relative underperformance. Over longer windows it's +25.1% in three months and -13.4% year-to-date.
#7. LAES — SEALSQ Corp Ordinary Shares · $775M
Semiconductors · Semiconductors — Analog & Mixed-Signal · Public since 2023
SEALSQ Corp develops certified secure microcontrollers and implements post-quantum cryptography. The company develops solutions including post-quantum microchips and devices that can be used in a variety of applications, from multi-factor authentication, home automation, and IT…
LAES (SEALSQ Corp Ordinary Shares) is a $775M name. Within the theme it sits in the Quantum Software & Algorithms sub-group. The past month has been quiet — -0.7%. Relative strength is weak at 36; it's lagging the market. Over longer windows it's -23.6% in three months and -28.3% year-to-date.
#8. QNC — Quantum eMotion Corp. · $711M
Software · Cybersecurity — Platform Solutions · Public since 2018
Quantum eMotion Corp is a technology development company focused on developing and commercializing intellectual property in quantum-based cryptographic and cybersecurity solutions. The company delivers quantum-based security solutions in software and hardware that embed true…
QNC (Quantum eMotion Corp.) carries a $711M valuation. Within the theme it sits in the Quantum Software & Algorithms sub-group. It's down -8.3% over the past month, lagging the theme's leaders. An RS rank of 0 flags relative underperformance. Over longer windows it's -13.2% in three months and -26.9% year-to-date.
#9. BTQ — BTQ Technologies Corp. Common Stock · $681M
Software · Cybersecurity — Platform Solutions · Public since 2023
BTQ Technologies Corp is engaged in the development of computer-based technology related to post-quantum cryptography, particularly as it applies to blockchain and related technologies, and their protection from the emerging security risk of quantum computing. The company…
BTQ (BTQ Technologies Corp. Common Stock) is a $681M name. Within the theme it sits in the Quantum Software & Algorithms sub-group. A +29.9% one-month move shows buyers in control. Relative strength is weak at 0; it's lagging the market. Over longer windows it's +30.3% in three months and -19.5% year-to-date.
#10. HQ — Horizon Quantum Holdings Ltd. Class A Ordinary Shares · $681M
Software · Algorithm Services — Computing Optimization · Public since 2026
Horizon Quantum Holdings Ltd is building software infrastructure to make quantum computers accessible to commercial enterprises and hardware providers. By bridging the gap between hardware and applications, the company seeks to equip developers, researchers, and enterprises with…
HQ (Horizon Quantum Holdings Ltd. Class A Ordinary Shares) is a $681M name. Within the theme it sits in the Quantum Software & Algorithms sub-group. A -20.4% one-month move has it out of favor for now. Relative strength is weak at 0; it's lagging the market. Over longer windows it's — in three months and +1.6% year-to-date.