Publicly Traded Quantum — 2026-06-18
Published:
Generated: 2026-06-18 UTC. Prices are last available daily close from Yahoo Finance and are informational only — not investment advice.
Companies
Quantum-primary publicly traded companies (quantum hardware, software, or quantum-enabled products as the core business). Diversified mega-caps with quantum divisions (Google, IBM, Microsoft, Amazon, etc.) are intentionally excluded.
| Ticker | Company | HQ | Focus | Last close | Δ vs prev close | 30d |
|---|---|---|---|---|---|---|
| IONQ | IonQ | College Park, MD, USA | Trapped-ion quantum computers | $56.55 | +3.40% | |
| RGTI | Rigetti Computing | Berkeley, CA, USA | Superconducting quantum hardware | $21.36 | +5.51% | |
| QBTS | D-Wave Quantum | Burnaby, BC, Canada | Quantum annealing | $24.69 | +7.72% | |
| QUBT | Quantum Computing Inc. (QCI) | Hoboken, NJ, USA | Photonic / entropy quantum systems | $10.76 | +10.13% | |
| ARQQ | Arqit Quantum | London, UK | Symmetric quantum-safe encryption | $24.38 | +7.88% | |
| QSI | Quantum-Si | Branford, CT, USA | Quantum-enabled protein sequencing | $1.00 | +5.83% | |
| LAES | SEALSQ | Geneva, Switzerland | Post-quantum secure semiconductors | $3.12 | +3.65% |
ETFs
Broad-basket exchange-traded funds that track quantum-computing and adjacent quantum-tech holdings.
| Ticker | Fund | Listing | Focus | Last close | Δ vs prev close | 30d |
|---|---|---|---|---|---|---|
| QTUM | Defiance Quantum ETF | USA | Broad quantum-computing ETF | $167.96 | +3.39% |
Leaderboard (1-day move)
**Top gainers**
- Quantum Computing Inc. (QCI) (QUBT) — +10.13%
- Arqit Quantum (ARQQ) — +7.88%
- D-Wave Quantum (QBTS) — +7.72%
- Quantum-Si (QSI) — +5.83%
- Rigetti Computing (RGTI) — +5.51%
- Defiance Quantum ETF (QTUM) — +3.39%
- IonQ (IONQ) — +3.40%
- SEALSQ (LAES) — +3.65%
- Rigetti Computing (RGTI) — +5.51%
- Quantum-Si (QSI) — +5.83%