According to CNBC, IonQ shares jumped 12% in premarket trading after the quantum computing company said it tested the industry's first real-time quantum error decoder, a capability that enables quantum error correction across operations without slowing execution time. The breakthrough lifted the broader quantum sector, with Rigetti Computing and D-Wave Quantum each rising more than 5.5% and Infleqtion gaining a similar amount. Worthington Enterprises surged about 16% after an encouraging outlook from leadership; CEO Joseph Hayek said the company is seeing opportunities across its business, "including rapidly growing demand for our engineered [American Society of Mechanical Engineers] tanks used in liquid cooling systems for data centers." First-quarter adjusted earnings and revenue topped analyst estimates, per LSEG. Maplebear, the owner of Instacart, rose more than 3% after saying it will let customers on its grocery platform use Meta's personal AI agent Muse, joining OpenAI's ChatGPT, Anthropic's Claude and Google's Gemini on the platform. Six Flags Entertainment rose 1% following a Wall Street Journal report that activist hedge fund Jana Partners was pressing the company to explore a sale, citing people familiar with the matter, after the fund's disappointment with Six Flags' second-quarter earnings. KB Home fell more than 1% after projecting fourth-quarter deliveries below expectations, with housing gross margins for the current quarter expected between 16% and 16.6%, short of the 17.2% analysts polled by LSEG sought.