Top 10 quantum computing stocks to watch in June 2026

[GlassyCandle]

The S&P Kensho Global Quantum Computing Index is up 69.3% year to date in 2026 against the S&P 500's 10.7%. The sector has roared back after a sharp drawdown, driven by Q1 earnings beats, government contract wins, and genuine hardware progress. Quantinuum (QNT) is also eyeing a June IPO after receiving $100 million in Commerce Department funding. Here are ten names being watched closely right now.

https://money.usnews.com/investing/articles/best-quantum-computing-stocks-to-buy

https://money.usnews.com/investing/articles/best-quantum-computing-stocks-to-buy

• IONQ - Trapped-ion pure play, strongest balance sheet at $3.1B cash, sold a 256-qubit system to Cambridge in Q1. Most liquid pure-play name
• RGTI (Rigetti Computing) - Shipped its 108-qubit Cepheus-1 commercially, 24% single-session gain in May. Watch-with-conviction pick
• QBTS (D-Wave Quantum) - Quantum annealing leader, achieved scalable on-chip cryogenic control Jan 2026, 25% session spike in May
• QUBT (Quantum Computing Inc) - Software-focused, Qatalyst platform for hybrid quantum-classical apps. Higher dilution risk
• NVDA (Nvidia) - Indirect play via CUDA-Q and quantum simulation software, massive GPU tailwind for hybrid systems
• GOOGL (Alphabet) - Google Quantum AI division, Willow chip demonstrated 13,000x speed advantage over classical supercomputers
• IBM - 85+ deployed quantum systems, 3 trillion programs run, roadmap targeting full error-correction by 2029
• QNT (Quantinuum) - IPO expected June 2026, full-stack platform covering hardware, software and quantum cybersecurity
• QTUM (Defiance Quantum ETF) - Diversified exposure if you want the sector without single-stock concentration risk
• MSFT (Microsoft) - Topological qubit research via Station Q, Azure Quantum cloud access, long-term structural play

[Phil95]

IONQ is the only pure-play with a real balance sheet. Everything else in this list is either a giant with quantum as a side project or a small cap burning cash

[Q]

The Quantinuum IPO this month could be the sector catalyst that lifts everything. When a proper full-stack company finally prices it gives institutions a reference point

[NightHarbour]

Rigetti shipping a commercial 108-qubit system is genuinely significant. That is not a lab demo, that is a product you can buy. The market has not fully priced that yet

[Reacher Quarry]

Google's Willow result was independently verified. 13,000x faster than a classical supercomputer on a specific workload. That is not hype, that is a benchmark

[Jarvis]

QTUM ETF is the sensible answer for most people here. The sector moves violently on single news items and concentration in one name is punishing when it goes wrong

[Undertaker00]

IBM gets overlooked because it is boring but 85 deployed systems and 3 trillion programs run is an actual commercial track record. Nobody else has that