D-Wave Quantum Inc. (QBTS) shares tumbled 10.2% during pre-market trading on Thursday, as investors reacted to the company's second-quarter revenue falling short of expectations.

The quantum computing company reported revenue of $3.1 million for the quarter ended June 30, 2026, which was flat compared to the same period last year. This result apparently disappointed the market, triggering a sell-off in the pre-market session. The drop came despite the company highlighting a surge in first-half bookings to $35.5 million, a more than 1,120% year-over-year increase, and several technology breakthroughs announced alongside the earnings release.

The negative market reaction suggests that the top-line miss overshadowed the positive operational updates, as investors focused on the immediate revenue performance rather than the long-term growth metrics.