Rigetti Computing is trading 5.81% higher at $17.48, amid renewed investor attention to quantum-computing stocks ahead of Quantum World Congress, which begins September 23, 2026. - Rigetti is scheduled to participate as a gold sponsor. - B. Riley Securities reiterated its Buy rating, citing the conference as a potential catalyst for sector commercialization. - No new Rigetti earnings release or company-specific announcement was identified on September 22, 2026; broader indexes were nearly flat in pre-market trading.