Entity
OQC – Sapphire-Based Superconducting Quantum Computing ($350M Series C, 2026)
OQC, a British quantum computing startup using sapphire-based superconducting chips, raised a $350 million oversubscribed Series C led by Bullhound Capital, with participation from the British Business Bank and university investors. The raise is one of the largest in European quantum computing history and signals growing institutional confidence in near-term quantum utility. UK government backing underscores the national strategic dimension of the investment.
Importance: 78%Confidence: 87%Mentions: 1Updated: June 4, 2026
## OQC – Sapphire-Based Superconducting Quantum Computing
### Overview
OQC (Oxford Quantum Circuits) is a British quantum computing startup specializing in sapphire-based superconducting quantum chips. In June 2026, the company announced a £260 million ($350 million) Series C funding round, described as oversubscribed (SiliconAngle, June 3, 2026).
### Funding Round Details
- **Amount:** £260 million / ~$350 million (SiliconAngle, June 3, 2026)
- **Round type:** Series C, oversubscribed (SiliconAngle, June 3, 2026)
- **Lead investor:** Bullhound Capital (SiliconAngle, June 3, 2026)
- **Other investors:** British Business Bank (U.K. government economic development bank), startup investment arms of several universities, and more than a dozen others (SiliconAngle, June 3, 2026)
### Technology
OQC's differentiated approach uses sapphire as a substrate for superconducting qubits, which the company claims offers advantages in coherence times and chip performance. The company competes in the superconducting qubit space alongside IBM, Google Quantum AI, and Rigetti.
### Strategic Context
- **UK quantum strategy:** British Business Bank participation signals this as a nationally strategic investment, consistent with the UK government's quantum computing roadmap
- **University backing:** Academic investor participation suggests deep research pipeline integration
- **Timing:** The raise follows growing enterprise demand for quantum-HPC hybrid workflows (per existing wiki: Quantum-HPC Integration)
### Implications for Attorneys & Entrepreneurs
- IP landscape: Sapphire-substrate approach may create novel patent positions in superconducting qubit fabrication
- Procurement: Early enterprise customers in financial services and pharma may gain competitive advantage in quantum-ready algorithm development
- Investment: Oversubscribed round at this scale signals institutional confidence in near-term quantum utility
### Watch
- Hardware milestone announcements (qubit count, error rates)
- Enterprise customer partnerships
- U.S. market expansion strategy
- Competitive response from IBM and Google Quantum AI
- IPO or strategic acquisition trajectory