Rigetti Computing Inc. Common Stock Q3 2026 Earnings Recap

Rigetti shares fell 8.6% after earnings, with the likely pressure coming from an ambitious technology road map that still places its next major system target in mid-2028, rather than near-term commercial milestones. The quarter included a 99.5% median two-qubit gate-fidelity result on its 108-qubit system and a $100 million Commerce Department agreement, but the transcript provides limited near-term financial or deployment detail.

Key Takeaways

• Cepheus-1 108Q reached 99.5% median two-qubit gate fidelity; the company also reported 99.6% on an 80-qubit sublattice and 99.7% on a 50-qubit sublattice.
• The system continues to operate at approximately 99.9% median single-qubit fidelity and approximately 60-nanosecond gate speeds.
• Rigetti signed a definitive agreement with the U.S. Department of Commerce for $100 million to support research and development in three areas tied to scaling superconducting quantum computing.
• The next major target is a 300-plus-qubit system with approximately 99.7% median two-qubit gate fidelity and sub-60-nanosecond gate speeds by mid-2028; a roughly 1,000-qubit system is targeted in about three years.
• Management said coherence times of approximately 25–30 microseconds were the primary constraint on further fidelity improvement, highlighting a technical challenge still to overcome.