Quantum computing stocks are rising again: How long will the rally last for QUBT, D-Wave, IonQ, and Rigetti?

After a rough start to the year, America’s four major publicly traded quantum computing companies are surging once again. The latest rally kicked off about a month ago, right around World Quantum Day, and since then, all four quantum computing companies—D-Wave Quantum Inc. (NYSE: QBTS), Ion Q, Inc. (NYSE: IONQ), Quantum Computing Inc. (Nasdaq: QUBT), and Rigetti Computing, Inc. (Nasdaq: RGTI)—have recovered much of their 2026 losses. And today, their stocks are up even more. Here’s why. Quantum stocks are finally reversing their bad start to 2026 America’s so-called Quantum Four publicly traded companies saw an incredible year of stock gains in 2025. But in the first part of 2026, investor sentiment soured. Some of this was likely due to simple profit-taking after a stellar run and a little post-high clarity that while quantum computing may be the future of computing, that future is still years away. And of course, external factors, including geopolitical uncertainty, AI bubble fears, and generalized anxiety about the economy, also helped pull down quantum stocks (as with most other tech stocks). But in the last month, the fortunes of quantum stocks began to turn. As Fast Company previously reported, this all started around World Quantum Day in mid-April. And that April rally is now continuing into May. As of this writing, all four quantum computing companies are seeing their stock prices jump yet again in premarket trading, including: D-Wave Quantum Inc. (NYSE: QBTS): up almost 7% IonQ, Inc. (NYSE: IONQ): up 4.5% Quantum Computing Inc. (Nasdaq: QUBT): up 24% Rigetti Computing, Inc. (Nasdaq: RGTI): up 5% Keep in mind, those premarket gains are in addition to gains seen over the the previous five trading sessions. Since that time, Rigetti is up nearly 16%, Quantum Computing Inc is up over 7%, IonQ is up over 24%, and D-Wave is up nearly 15%. Why have the Quantum Four surged so much over the past week? It’s quantum earnings season The most significant reason why quantu