Markets & Economy Ionis Pharmaceuticals Shares Fall After Pelacarsen Phase 3 Trial Misses Primary Endpoint September 8, 2026 · 10:54 am 1 sources Image: Yahoo Finance ad slot · in-content video 16:9 Coverage More coverageIonis Pharmaceuticals Shares Fall After Pelacarsen Phase 3 Trial Misses Primary EndpointYahoo Finance · September 8, 2026 10:54