Six companies—Ionis Pharmaceuticals, Isarna Therapeutics, Regulus Therapeutics, Sarepta Therapeutics, Secarna Pharmaceuticals, and Wave Life Sciences—are leading in the development of antisense oligonucleotides, a targeted treatment for various diseases. Ionis, a pioneer with over 40 drugs in its pipeline, recently priced a $500 million IPO. Isarna's ISTH0036 targets TGF-β for ophthalmic conditions. Regulus focuses on microRNA targeting with its lead candidate RGLS8429 for ADPKD. Sarepta has three approved PPMO therapies for DMD and a recent $1 billion deal with Arrowhead Pharmaceuticals. Secarna's SECN-15 targets NRP1 for oncology. Wave Life Sciences' WVE-003, for Huntington's disease, recently reported positive phase 1b/2a trial results. The antisense oligonucleotide market is projected to grow to $5,519 million by 2033.