QuantumScape Corporation's stock experienced a significant 24-hour plunge of 9.41%, with the decline intensifying in post-market trading on Wednesday. The sharp drop followed the release of the company's fourth-quarter and full-year 2025 financial results.

While the solid-state battery developer reported a quarterly loss of $0.17 per share, meeting analyst estimates, and showed a 10% year-over-year improvement in its full-year Adjusted EBITDA loss, investor sentiment turned negative on the company's forward outlook. QuantumScape provided guidance for 2026, projecting an Adjusted EBITDA loss between $250 million and $275 million and planning to increase capital expenditures to a range of $40 million to $60 million.

The market reaction suggests concerns over the continued absence of revenue from its core business and the substantial capital required to scale production before achieving profitability. The company's focus for 2026 remains on demonstrating scalable production of its solid-state battery technology, but the projected financial losses appear to have weighed heavily on investor confidence.