Publicly Traded Quantum — 2026-05-17
Published:
Generated: 2026-05-17 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 | $51.95 | -9.61% | |
| RGTI | Rigetti Computing | Berkeley, CA, USA | Superconducting quantum hardware | $17.85 | -7.37% | |
| QBTS | D-Wave Quantum | Burnaby, BC, Canada | Quantum annealing | $20.35 | -8.04% | |
| QUBT | Quantum Computing Inc. (QCI) | Hoboken, NJ, USA | Photonic / entropy quantum systems | $10.51 | -10.44% | |
| ARQQ | Arqit Quantum | London, UK | Symmetric quantum-safe encryption | $13.34 | -3.82% | |
| QSI | Quantum-Si | Branford, CT, USA | Quantum-enabled protein sequencing | $0.89 | -4.61% | |
| LAES | SEALSQ | Geneva, Switzerland | Post-quantum secure semiconductors | $2.87 | -7.12% |
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 | $143.08 | -3.25% |
Leaderboard (1-day move)
**Top gainers**
- Defiance Quantum ETF (QTUM) — -3.25%
- Arqit Quantum (ARQQ) — -3.82%
- Quantum-Si (QSI) — -4.61%
- SEALSQ (LAES) — -7.12%
- Rigetti Computing (RGTI) — -7.37%
- Quantum Computing Inc. (QCI) (QUBT) — -10.44%
- IonQ (IONQ) — -9.61%
- D-Wave Quantum (QBTS) — -8.04%
- Rigetti Computing (RGTI) — -7.37%
- SEALSQ (LAES) — -7.12%