Quantum Stocks & Public Quantum Companies
Complete Guide to Quantum Computing Stocks
Welcome to the complete directory of quantum stocks and publicly traded quantum computing companies. Track all quantum technology stocks trading on major exchanges worldwide.
Publicly Traded Quantum Companies
NYSE (New York Stock Exchange)
IONQ - IonQ Inc
Ticker: IONQ Exchange: NYSE Company: IonQ Inc Technology: Trapped-Ion Quantum Computing Headquarters: College Park, Maryland, USA IPO Date: October 2021 Market Focus: Pure-play quantum computing hardware and cloud services
Key Highlights:
- First publicly traded pure-play quantum computing company
- $636M raised in SPAC merger
- September 2025: $1.065B acquisition of Oxford Ionics (largest quantum acquisition ever)
- Available on AWS Braket, Azure Quantum, Google Cloud
View Full IONQ Stock Details →
QBTS - D-Wave Quantum Inc
Ticker: QBTS Exchange: NYSE Company: D-Wave Quantum Inc Technology: Quantum Annealing Headquarters: Burnaby, British Columbia, Canada IPO Date: August 2022 Market Focus: Quantum optimization systems
Key Highlights:
- Pioneer of commercial quantum computing (founded 1999)
- $815M cash balance (July 2025)
- 5,000+ qubit quantum annealing systems
- 133 customers including Lockheed Martin, Google/NASA, BASF
View Full QBTS Stock Details →
NASDAQ
RGTI - Rigetti Computing
Ticker: RGTI Exchange: NASDAQ Company: Rigetti Computing, Inc. Technology: Superconducting Quantum Processors Headquarters: Berkeley, California, USA IPO Date: March 2022 Market Focus: Full-stack quantum computing with owned foundry
Key Highlights:
- Only quantum company with dedicated quantum foundry
- $100M+ partnership with Quanta Computer
- $5.7M in quantum system orders (September 2025)
- 84-qubit superconducting systems
View Full RGTI Stock Details →
ARQQ - Arqit Quantum Inc
Ticker: ARQQ Exchange: NASDAQ Company: Arqit Quantum Inc Technology: Quantum Encryption & Quantum-Safe Security Headquarters: London, United Kingdom IPO Date: September 2021 Market Focus: Quantum-safe encryption and satellite key distribution
Key Highlights:
- QuantumCloud™ software-only quantum-safe encryption
- Satellite-based quantum key distribution
- UK Space Agency and European Space Agency partnerships
- Post-quantum cryptography leader
View Full ARQQ Stock Details →
International Exchanges
688027 - QuantumCTek
Ticker: 688027 Exchange: Shanghai Stock Exchange (STAR Market) Company: QuantumCTek Co., Ltd. Technology: Quantum Communication & QKD Headquarters: Hefei, Anhui Province, China IPO Date: July 2020 Market Focus: Quantum communication infrastructure
Key Highlights:
- China’s first publicly traded quantum technology company
- Founded by Pan Jianwei (“China’s father of quantum”)
- 46-node Hefei quantum network deployed
- Beijing-Shanghai quantum communication backbone
Quantum Stocks Comparison
| Ticker | Company | Exchange | Technology | Market Cap | Founded |
|---|---|---|---|---|---|
| IONQ | IonQ Inc | NYSE | Trapped-Ion | Public | 2015 |
| RGTI | Rigetti Computing | NASDAQ | Superconducting | Public | 2013 |
| QBTS | D-Wave Quantum | NYSE | Quantum Annealing | Public | 1999 |
| ARQQ | Arqit Quantum | NASDAQ | Quantum Security | Public | 2017 |
| 688027 | QuantumCTek | Shanghai | Quantum Comm | Public | 2009 |
How to Invest in Quantum Stocks
Investment Options
1. Pure-Play Quantum Stocks
- IONQ (NYSE: IONQ) - Highest pure-play exposure to quantum computing hardware
- RGTI (NASDAQ: RGTI) - Superconducting quantum with owned foundry
- QBTS (NYSE: QBTS) - Quantum annealing optimization specialist
2. Quantum Security Stocks
- ARQQ (NASDAQ: ARQQ) - Quantum-safe encryption and satellite QKD
3. International Quantum Stocks
- QuantumCTek (688027) - Chinese quantum communication leader
Why Invest in Quantum Computing Stocks?
Growth Potential:
- Market expected to reach $65B+ by 2030
- Early-stage technology with massive long-term potential
- Government and enterprise adoption accelerating
Diversification:
- Different quantum technologies (trapped-ion, superconducting, annealing, security)
- Hardware, software, and services exposure
- Geographic diversification (USA, Canada, UK, China)
Commercial Traction:
- Fortune 500 customers
- Government contracts (DoD, DoE, NASA)
- Cloud platform partnerships (AWS, Azure, Google Cloud)
Quantum Stocks Research
Questions About Quantum Stocks
Which quantum stock is best? It depends on your investment thesis:
- Best pure-play hardware: IONQ (trapped-ion) or RGTI (superconducting)
- Most established: QBTS (D-Wave, founded 1999)
- Quantum security play: ARQQ (post-quantum cryptography)
- Highest growth potential: IONQ (largest acquisition, cloud partnerships)
Are quantum stocks a good investment? Quantum computing stocks are high-risk, high-reward investments in emerging technology. Consider:
- ✅ Massive long-term potential
- ✅ Growing commercial traction
- ⚠️ Pre-revenue or early revenue stage
- ⚠️ High volatility
- ⚠️ Technology risk
What’s the difference between IONQ and RGTI?
- IONQ: Trapped-ion qubits, higher gate fidelity, cloud-first strategy
- RGTI: Superconducting qubits, owns quantum foundry, full-stack approach
When will quantum computers become profitable? Industry consensus: 2027-2030 for scaled commercialization. Public quantum companies are currently focused on:
- Technology development
- Cloud partnerships
- Government contracts
- Enterprise pilot programs
Quantum Stock Market News
Recent Quantum Stock Developments (2025)
IONQ (NYSE: IONQ):
- September 2025: $1.065B acquisition of Oxford Ionics approved
- Expanding into UK quantum market
- New enterprise customers announced
RGTI (NASDAQ: RGTI):
- September 2025: $5.7M quantum system orders
- Quanta Computer partnership delivering results
- Optical readout technology advancement
QBTS (NYSE: QBTS):
- July 2025: $400M at-the-market offering completed
- $815M cash for strategic acquisitions
- 5,000+ qubit Advantage systems deployed
ARQQ (NASDAQ: ARQQ):
- Government partnerships expanding
- Satellite quantum key distribution deployments
- Post-quantum cryptography adoption growing
Private Quantum Companies (Not Public Stocks)
While these quantum companies are not publicly traded, they represent potential future IPOs:
Major Private Quantum Companies:
- PsiQuantum - Photonic quantum computing ($665M+ raised)
- Atom Computing - Neutral atom quantum computers ($100M+ raised)
- QuEra Computing - Neutral atom quantum processors ($37M+ raised)
- Xanadu - Photonic quantum computing ($270M+ raised)
- Quantinuum - Trapped-ion (Honeywell + Cambridge Quantum merger)
- IBM Quantum - Part of IBM (NYSE: IBM)
- Google Quantum AI - Part of Alphabet (NASDAQ: GOOGL)
Learn More About Quantum Stocks
Resources
- Public Quantum Companies Directory - Full profiles of all public quantum companies
- Quantum Companies Directory - 271+ quantum companies worldwide
- Quantum Investment Tracker - Funding rounds and quantum investments
- UK Quantum Companies - 33+ UK quantum technology companies
Stay Updated
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- Built by Quantum Zeitgeist - quantum computing news and analysis
- Contact us to submit quantum company updates
Disclaimer
Investment Risk Warning: Quantum computing stocks are highly speculative investments in emerging technology. Stock prices are volatile and companies are in early stages of commercialization. This information is for educational purposes only and does not constitute investment advice, financial advice, or stock recommendations.
Always conduct your own due diligence and consult qualified financial advisors before investing in quantum stocks or any securities. Past performance does not guarantee future results.
Last updated: October 2025