Amid the increasingly competitive myasthenia gravis drug development space, siRNA candidate cemdisiran met phase III endpoints, with the monotherapy showing numerically higher results than a combination product. Regeneron Pharmaceuticals Inc., which has a worldwide license to cemdisiran from Alnylam Pharmaceuticals Inc., plans to file for U.S. approval in generalized myasthenia gravis, a rare and chronic autoimmune disease leading to life-threatening muscle weakness, in the first quarter of 2026.

Just a month after laying off 147 employees and announcing plans to mull “strategic alternatives,” Vor Biopharma Inc. reported raising $175 million in private placement in public equity financing and inking a new $4.23 billion license deal for Yantai Rongchang Biotechnologies (Remegen) Co. Ltd.’s telitacicept, a dual-target fusion protein drug approved in China for three autoimmune indications. The news was disclosed after U.S. market hours June 25. Vor’s shares (NASDAQ:VOR) gained 34 cents, or 60.5%, to close June 26 at 89 cents. The company’s shares had risen for eight consecutive trading days since June 17.

Just a month after laying off 147 employees and announcing plans to mull “strategic alternatives,” Vor Biopharma Inc. reported raising $175 million in private placement in public equity financing and inking a new $4.23 billion license deal for Yantai Rongchang Biotechnologies (Remegen) Co. Ltd.’s telitacicept, a dual-target fusion protein drug approved in China for three autoimmune indications. The news was disclosed after U.S. market hours June 25. Vor’s shares (NASDAQ:VOR) gained 34 cents, or 60.5%, to close June 26 at 89 cents. The company’s shares had risen for eight consecutive trading days since June 17.

The U.S. FDA approval of Johnson & Johnson’s Imaavy (nipocalimab-aahu) for myasthenia gravis brings the monoclonal antibody into a treatment space that teems with competition, both approved and in-development candidates. The human Fc receptor inhibitor was approved to treat generalized myasthenia gravis in patients who are 12 years and older. Patients must be anti-acetylcholine receptor [AChR] or anti-muscle-specific kinase [MuSK] antibody positive. Anti-AChR and anti-MuSK antibody-positive individuals make up more than 90% of all antibody-positive gMG patients.

Remegen Co. Ltd. emerged as a surprise challenger in the generalized myasthenia gravis space, unveiling positive phase III data of its China-approved lupus drug, telitacicept (RCT-18; Tai’ai), in the rare autoimmune neuromuscular disorder at the 2025 American Academy of Neurology conference.

Remegen Co. Ltd. emerged as a surprise challenger in the generalized myasthenia gravis space, unveiling positive phase III data of its China-approved lupus drug, telitacicept (RCT-18; Tai’ai), in the rare autoimmune neuromuscular disorder at the 2025 American Academy of Neurology conference.

The U.S. FDA approval won in June by Argenx SE of subcutaneously given Vyvgart Hytrulo (efgartigimod alfa and hyaluronidase) for adults with chronic inflammatory demyelinating polyneuropathy (CIDP) sparked interest in other prospects taking aim at the rare disease. Some – including Argenx – are going after generalized myasthenia gravis and multifocal motor neuropathy with their compounds.

Zai Lab Ltd., of Shanghai and Cambridge, Mass., has been on a regulatory roll in China, gaining approval of Bristol Myers Squibb Co.’s Augtyro (repotrectinib) for lung cancer on May 12 and NMPA acceptance of subcutaneous Vyvgart‘s (efgartigimod alfa SC) supplemental BLA with priority review on May 14.

Zai Lab Ltd., of Shanghai and Cambridge, Mass., has been on a regulatory roll in China, gaining approval of Bristol Myers Squibb Co.’s Augtyro (repotrectinib) for lung cancer on May 12 and NMPA acceptance of subcutaneous Vyvgart‘s (efgartigimod alfa SC) supplemental BLA with priority review on May 14.