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argenx Completes Acquisition of Forte Biosciences, Inc.

Acquisition adds first-in-class anti-CD122 Antibody, FB102, to argenx's immunology pipeline August 27, 2026 – 8:50 AM ET Amsterdam, the Netherlands – argenx (Euronext & Nasdaq: ARGX), a global immunology innovation company today announced the successful completion of the acquisition of Forte Biosciences, Inc. (“Forte”) (Nasdaq: FBRX). The acquisition expands argenx's portfolio of differentiated immunology medicines, adding FB102, a first-in-class anti-CD122 antibody with clinical proof-of-concept in vitiligo and celiac disease and potential to address multiple autoimmune diseases.

Zai Lab and argenx Announce Positive Topline Results from Phase 3 ALKIVIA Trial of Efgartigimod in Autoimmune Myositis

SHANGHAI & CAMBRIDGE, Mass. & AMSTERDAM--(BUSINESS WIRE)--Zai Lab Limited (NASDAQ: ZLAB; HKEX: 9688) and argenx (Euronext & NASDAQ: ARGX), today announced positive topline results from the ALKIVIA Phase 3 study evaluating VYVGART® Hytrulo (efgartigimod alfa and hyaluronidase-qvfc) in adults with autoimmune myositis. Study met its primary endpoint (p=0.0011) In the combined immune-mediated necrotizing myopathy (IMNM) and dermatomyositis (DM) population, patients treated with efgartigimod dem.

argenx Announces Positive Topline Results from Phase 3 ALKIVIA Trial of Efgartigimod in Autoimmune Myositis

Study met primary endpoint of mean Total Improvement Score (TIS) at Week 52 in the combined study population of IMNM and DM patients (p=0.0011) Patient improvements observed early and sustained throughout study; consistent treatment effect across IMNM and DM First Phase 3 study to show statistically significant and clinically meaningful improvements in disease activity in IMNM, a subtype with no approved therapy argenx to host a conference call on August 17 th at 2:30 PM CET/ 8:30 AM ET August 17, 2026, 7:00 AM CET Amsterdam, the Netherlands – argenx SE (Euronext & Nasdaq: ARGX), a global immunology innovation company, today announced positive topline results from the ALKIVIA Phase 3 study evaluating VYVGART® Hytrulo (efgartigimod alfa and hyaluronidase-qvfc) in adults with autoimmune myositis. Study met its primary endpoint (p=0.0011) In the combined immune-mediated necrotizing myopathy (IMNM) and dermatomyositis (DM) population, patients treated with efgartigimod demonstrated statistically significant and clinically meaningful 15.4-point greater improvement in mean Total Improvement Score (TIS) at Week 52 versus placebo (47.95 vs 32.56).