🔴 Ionis Pharmaceuticals is trading 4.23% down in after-hours trading with no clear company-specific catalyst identified

Ionis Pharmaceuticals is trading 4.23% down at $58.74 after closing at $61.34 on September 2, 2026, with no clear company-specific catalyst identified.

• No September 2 company-specific announcement, earnings release, or late-breaking catalyst explaining the after-hours decline was identified in available coverage.
• The company’s investor-relations page showed no matching release.
• The broader market finished higher, so a global risk-off explanation is not supported.