Publicly Traded Quantum — 2026-06-03
Published:
Generated: 2026-06-03 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 | $68.23 | -4.44% | |
| RGTI | Rigetti Computing | Berkeley, CA, USA | Superconducting quantum hardware | $24.09 | -10.36% | |
| QBTS | D-Wave Quantum | Burnaby, BC, Canada | Quantum annealing | $27.55 | -7.89% | |
| QUBT | Quantum Computing Inc. (QCI) | Hoboken, NJ, USA | Photonic / entropy quantum systems | $11.20 | -8.57% | |
| ARQQ | Arqit Quantum | London, UK | Symmetric quantum-safe encryption | $14.64 | -10.02% | |
| QSI | Quantum-Si | Branford, CT, USA | Quantum-enabled protein sequencing | $1.19 | -4.03% | |
| LAES | SEALSQ | Geneva, Switzerland | Post-quantum secure semiconductors | $3.46 | -6.74% |
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 | $167.76 | -0.59% |
Leaderboard (1-day move)
**Top gainers**
- Defiance Quantum ETF (QTUM) — -0.59%
- Quantum-Si (QSI) — -4.03%
- IonQ (IONQ) — -4.44%
- SEALSQ (LAES) — -6.74%
- D-Wave Quantum (QBTS) — -7.89%
- Rigetti Computing (RGTI) — -10.36%
- Arqit Quantum (ARQQ) — -10.02%
- Quantum Computing Inc. (QCI) (QUBT) — -8.57%
- D-Wave Quantum (QBTS) — -7.89%
- SEALSQ (LAES) — -6.74%