Publicly Traded Quantum — 2026-05-21
Published:
Generated: 2026-05-21 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 | $58.89 | +12.24% | |
| RGTI | Rigetti Computing | Berkeley, CA, USA | Superconducting quantum hardware | $22.04 | +30.57% | |
| QBTS | D-Wave Quantum | Burnaby, BC, Canada | Quantum annealing | $25.74 | +33.37% | |
| QUBT | Quantum Computing Inc. (QCI) | Hoboken, NJ, USA | Photonic / entropy quantum systems | $11.41 | +19.35% | |
| ARQQ | Arqit Quantum | London, UK | Symmetric quantum-safe encryption | $16.45 | +25.67% | |
| QSI | Quantum-Si | Branford, CT, USA | Quantum-enabled protein sequencing | $0.99 | +13.01% | |
| LAES | SEALSQ | Geneva, Switzerland | Post-quantum secure semiconductors | $3.27 | +14.74% |
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 | $149.33 | +2.67% |
Leaderboard (1-day move)
**Top gainers**
- D-Wave Quantum (QBTS) — +33.37%
- Rigetti Computing (RGTI) — +30.57%
- Arqit Quantum (ARQQ) — +25.67%
- Quantum Computing Inc. (QCI) (QUBT) — +19.35%
- SEALSQ (LAES) — +14.74%
- Defiance Quantum ETF (QTUM) — +2.67%
- IonQ (IONQ) — +12.24%
- Quantum-Si (QSI) — +13.01%
- SEALSQ (LAES) — +14.74%
- Quantum Computing Inc. (QCI) (QUBT) — +19.35%