Trapped-Ion Quantum Computing Stocks
Trapped-ion qubits hold the industry's fidelity records: individual atoms suspended in electromagnetic fields make identical, long-lived qubits with all-to-all connectivity, at the cost of slower gate speeds and harder scaling. These are the public pure plays built on trapped ions, ranked by market cap.
As of · market data updates live
The companies, in order
1. IonQ (IONQ) — $15.65B
IonQ develops trapped-ion quantum computers accessible via cloud through AWS Braket, Azure Quantum, and Google Cloud. The company builds full-stack quantum hardware and software targeting fault-tolerant quantum computing.
IONQ live data, financials & filings →2. Quantinuum (QNT) — $13.69B
Quantinuum develops trapped-ion quantum computers and quantum software, spun out of Honeywell in 2021. Its H-Series and Helios systems hold world records in gate fidelity and quantum volume. Software platforms include InQuanto (quantum chemistry), Quantum Origin (cybersecurity entropy), and lambeq (quantum NLP/AI). IPO: Nasdaq June 2026.
QNT live data, financials & filings →Methodology: Includes US-listed pure-play quantum companies whose primary hardware modality is trapped-ion qubits. Gate fidelity figures are company-reported for flagship systems. 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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