Ionis reported third-quarter revenue of $243 million, up 55% year over year. While management reaffirmed 2026 revenue, operating loss, and cash guidance, it cut 2026 Tryngolza (for sHTG/FCS) revenue guidance by 50% to approximately $50 million, triggering a 21% decline in the shares on Nov. 9.
Ionis' antisense technology and intellectual property estate have allowed the firm to create an entirely new class of therapeutics for difficult-to-treat diseases.
Bears
Beyond recent strong collaboration revenue, Ionis has historically been unprofitable, and RNA-based therapies have had a long path to market.
Ionis Pharmaceuticals is the leading developer of antisense technology to discover and develop novel drugs. Its broad clinical and preclinical pipeline targets a wide variety of diseases, with an emphasis on cardiovascular, metabolic, neurological, and rare diseases. Ionis and Biogen brought Spinraza to market in 2016 as a treatment for spinal muscular atrophy, and Biogen launched ALS drug Qalsody in 2023. Ionis brought two additional drugs to market via its cardiovascular-focused subsidiary Akcea, including ATTR amyloidosis drug Tegsedi (2018) and cardiology drug Waylivra (Europe, 2019). Ionis and AstraZeneca launched polyneuropathy drug Wainua in 2024. Ionis marked its first two independent launches in 2025 for Tryngolza (for FCS) and Dawnzera (for HAE).