🟢 Solid Biosciences is trading 5% up in after-hours trading amid broad market risk-on sentiment

Solid Biosciences is trading at $8.97, up 5.08% after closing at $8.54 on September 21, 2026, amid a broader risk-on market backdrop with no verified company-specific announcement or post-close earnings release identified.

• The S&P 500 rose 1.50% and Nasdaq Composite gained 2.52% on September 21.
• Recent conference commentary highlighted upcoming FDA discussions and clinical milestones, but those were not new September 21 announcements.