Oxford Quantum Circuits (OQC) today announced the close of a $350 million (£260 million), the largest Series C round completed by a quantum computing company globally.
The financing marks a major milestone for OQC and for the quantum computing sector, as investor attention shifts from long-term research toward commercial deployment, infrastructure scale and enterprise adoption.
The round positions OQC among the best-capitalized private quantum computing companies in the world and provides the company with significant new capital to accelerate its expansion in the United States and other priority global markets.
The round, led by Bullhound Capital, includes a mix of strategic, institutional and venture investors, including Chevron, the British Business Bank and Oxford Science Enterprises (OSE), alongside other leading international venture capital firms.
Founded in the United Kingdom, OQC builds superconducting quantum computers designed for real-world enterprise and government use. The company has developed a global deployment model focused on bringing quantum computing into secure, commercial infrastructure environments, including data centers and cloud-connected platforms.
Expanding OQC’s U.S. presence is a central part of its next phase of growth. The company plans to expand its commercial and operational footprint in the United States, where demand for advanced computing infrastructure is increasing across financial services, security, defense, AI and advanced manufacturing.
Its current installation in New York City and expansion in the American market places OQC closer to major enterprise customers, investors, infrastructure partners and technology ecosystems that play a central role in quantum adoption.
The new funding will support OQC’s next stage of growth, including the development of next-generation quantum systems in their roadmap, additional infrastructure deployments, expanded U.S. commercial operations and deeper engagement with enterprise, government and technology partners.
Gerald Mullally, CEO of OQC, said in a statement, “Raising the largest quantum Series C globally is a clear statement of intent. OQC was founded in the U.K., but the opportunity ahead of us is global and the United States is central to that opportunity. We are building quantum computing infrastructure where customers need it: close to the data, networks and enterprise systems that power the global economy. This financing gives us the capital to accelerate our U.S. expansion, deepen our technology leadership and scale OQC into one of the defining companies in the quantum era.”
The financing comes amid intensifying competition among the United States, Europe and Asia to lead in quantum technologies, a sector increasingly viewed as strategically important to economic competitiveness, national security and long-term technology leadership.