Quantum Stocks by US Government Funding
Government contracts are some of the most durable revenue in quantum computing — defense, national labs and research agencies pay for systems and services years before the commercial market matures. This list ranks pure-play quantum stocks by their cumulative US federal contract and grant awards recorded on USAspending.gov.
As of · updates with live market data
Not ranked (no federal awards data yet): XNDU, QNT, HQ, IQMX.
The companies, in order
1. IonQ (IONQ) — $302.98M
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. Infleqtion (INFQ) — $86.27M
Infleqtion (formerly ColdQuanta) designs and builds quantum computers, precision sensors, and quantum software using cold atom and neutral atom technology. Its Sqale quantum computer has been commercially deployed at the UK National Quantum Computing Centre.
INFQ live data, financials & filings →3. Quantum-Si (QSI) — $30.30M
Quantum-Si is building a semiconductor chip-based platform for single-molecule protein sequencing using quantum-detection technology. Its Platinum Pro system targets proteomics research; next-gen Proteus instrument targets late 2026 commercial launch.
QSI live data, financials & filings →4. Rigetti Computing (RGTI) — $8.87M
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 →5. Quantum Computing Inc (QUBT) — $1.45M
Quantum Computing Inc develops photonic quantum processors and reservoir quantum computing systems. Its Dirac series uses Entropy Quantum Computing (EQC) for constrained optimization, and its Neurawave product applies photonic reservoir computing to edge AI inference.
QUBT live data, financials & filings →6. D-Wave Quantum (QBTS) — $40.00K
D-Wave is the world's first commercial quantum computing company, specializing in quantum annealing technology for optimization problems. Its systems are used in logistics, finance, and drug discovery.
QBTS live data, financials & filings →7. Arqit Quantum (ARQQ) — $0.00
Arqit provides quantum-safe encryption-as-a-service via its SKA-Platform, delivering symmetric key agreements resistant to both current and future quantum computer attacks, protecting governments and enterprises.
ARQQ live data, financials & filings →Methodology: Totals are cumulative US federal prime awards (contracts + grants) attributed to each company on USAspending.gov. Foreign-government funding (significant for IQM, Arqit and others) is not captured. Award totals reflect obligated amounts, which can differ from cash received to date. 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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