Quantum-Si Reports 41.8% Revenue Decline in Q2 2026, Net Loss Improves

Quantum-Si Incorporated reported its financial results for the second quarter of 2026, revealing a total revenue of $344,000, a significant decrease of 41.8% compared to $591,000 in the same period of 2025. For the first half of 2026, revenue totaled $602,000, down 58.0% from $1.4 million in the prior year. The decline in revenue was primarily attributed to reduced sales volumes of instruments and consumables, as customers deferred purchasing decisions in anticipation of the upcoming launch of the Proteus platform, which is now expected to be commercially available in the second quarter of 2027.

The company's gross profit for the second quarter was $172,000, reflecting a 51.0% decrease from $351,000 in the same quarter of 2025. The gross profit margin also fell to 50.0% from 59.4% year-over-year, driven by a change in the mix of products sold. Operating expenses decreased to $25.8 million from $30.5 million in the prior year, primarily due to a reduction in selling, general, and administrative expenses, which fell by 16.1% to $10.0 million. The net loss for the quarter was $23.5 million, an improvement from a loss of $28.8 million in the same quarter of 2025.

Operationally, Quantum-Si's employee headcount was reported at 152 as of June 30, 2026, with a restructuring program announced in August 2026 aimed at streamlining operations and focusing resources on the Proteus development program. This program is expected to result in a workforce reduction of approximately 20%, with one-time cash charges related to severance and other benefits estimated at $2.6 million. The company also entered into a new lease agreement for a facility in San Diego, California, which is expected to replace its existing location.

As of June 30, 2026, Quantum-Si had cash, cash equivalents, and marketable securities totaling $169.9 million, providing sufficient liquidity to fund operations for at least the next twelve months. The company continues to monitor market conditions and may seek additional financing through equity offerings or collaborations to support its ongoing research and development efforts. Looking ahead, Quantum-Si anticipates that the launch of the Proteus platform may impact revenue as customers delay purchases of existing products in favor of the new technology.