Quantum computing stocks rise pre-market; SEALSQ Corp surges over 11%, following a nearly 40% jump yesterday; Rigetti Computing gains over 3%, D-Wave Quantum rises nearly 3%.

Quantum computing stocks rise pre-market; SEALSQ Corp surges over 11%, following a nearly 40% jump yesterday; Rigetti Computing gains over 3%, D-Wave Quantum rises nearly 3%.

Pre-market trading on September 12, 2025, saw a significant surge in quantum computing stocks, with Quantum Computing Inc. (QUBT) leading the pack. QUBT's stock surged over 11% following a nearly 40% jump from the previous day. This performance was part of a broader rally that saw Rigetti Computing gain over 3% and D-Wave Quantum rise nearly 3%.

QUBT's stock has been on a meteoric rise throughout 2025, turning a little-known small-cap into one of the year's most explosive tech stocks. Over the past 12 months, QUBT has surged by over 2,500%, far outpacing even high-flying peers in the quantum computing space . The stock climbed from mere cents to the mid-$20s, hitting an intraday high around $27 (its 52-week range spans $0.65 to $27.15) . By early October 2025, its market capitalization swelled into the multi-billion range, a remarkable feat for a company with minimal revenues.

The latest rally was fueled by a mix of positive news and analyst upgrades. On September 22, QUBT announced an oversubscribed $500 million private placement of common stock, which was subsequently upsized to $750 million due to high demand . This colossal fundraising was led by major institutional investors and brought QUBT's total capital raised since late 2024 to approximately $1.64 billion . The company now has over $1.5 billion in cash on hand, giving it one of the strongest balance sheets among publicly traded quantum companies .

The funding will be used to fuel aggressive growth initiatives, including accelerating commercialization of its quantum solutions, expanding manufacturing capacity, hiring top talent, ramping up R&D, and pursuing strategic acquisitions or partnerships . QUBT has already been investing in vertical integration by building its own photonic chip fabrication foundry in Arizona earlier in 2025 . Now flush with cash, it can further expand that foundry's capabilities and output.

While the stock's valuation remains extreme, with a price-to-sales ratio above 10,000×, analysts remain divided on QUBT's future prospects. Ascendiant Capital recently upgraded the stock with a $40 price target, implying substantial upside from current levels . Meanwhile, some skeptics warn that the fundamentals must catch up to the hype. Only time will tell whether QUBT lives up to expectations, but in the near term, hope and hype could continue to propel the stock .