Superconducting Quantum Computing Stocks
Superconducting qubits are the most industrialized quantum computing technology — the approach behind Google's Willow chip and IBM's roadmap — offering fast gates and chip-fab manufacturability at the cost of millikelvin cooling and shorter coherence times. These are the pure-play public companies betting on superconducting hardware, ranked by market cap.
As of · updates with live market data
The companies, in order
1. Rigetti Computing (RGTI) — $5.97B
Rigetti Computing is a full-stack quantum-classical computing company using superconducting qubits. It fabricates its own chips at Fab-1 and provides cloud access through Quantum Cloud Services (QCS).
RGTI live data, financials & filings →2. IQM Quantum Computers (IQMX) — $3.65B
IQM Quantum Computers is Europe's largest quantum computing hardware company, building on-premises superconducting quantum computers for national labs, HPC centers and universities — with systems delivered across Finland, Germany, Spain, Poland, South Korea, Taiwan and beyond. It operates its own chip fabrication facility in Espoo, Finland.
IQMX live data, financials & filings →Methodology: Includes US-listed pure-play quantum companies whose primary hardware modality is superconducting qubits. Big-tech superconducting programs (Google, IBM) are tracked separately on their ecosystem pages since quantum is a small slice of those businesses. Covers the US-listed pure-play quantum universe tracked by this site. Full metric definitions on the methodology page. Not investment advice.
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