argenx discontinues Phase 3 TED studies, shares decline
Written by Emily J. Thompson, Senior Investment Analyst
Updated: Dec 15 2025
0mins
Source: Newsfilter
argenx SE's stock fell by 3.85% and hit a 20-day low amid the announcement of the discontinuation of its Phase 3 UplighTED studies for efgartigimod due to futility concerns.
The decision to halt the trials was based on a recommendation from the Independent Data Monitoring Committee, which indicated that the studies were unlikely to meet their primary endpoints. This news has negatively impacted the company's market outlook and investor sentiment, leading to a decline in share price despite broader market strength, with the Nasdaq-100 up 0.78% and the S&P 500 up 0.58%.
The discontinuation of the trials raises concerns about the company's research progress in treating thyroid eye disease, although argenx emphasized its commitment to patient care and future research endeavors. The company plans to conduct a thorough analysis of the trial data to inform future studies.
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Analyst Views on ARGX
Wall Street analysts forecast ARGX stock price to rise
17 Analyst Rating
14 Buy
3 Hold
0 Sell
Strong Buy
Current: 835.990
Low
858.00
Averages
1048
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Current: 835.990
Low
858.00
Averages
1048
High
1317
About ARGX
argenx SE, formerly arGEN X BV, is a Netherlands-based biopharmaceutical company. It is primarily engaged in creating and developing a pipeline of differentiated antibody therapeutics for the treatment of severe autoimmune diseases using its discovery platform, Simple Antibody, which exploits characteristics of the llama immune system. The Company develops a pipeline of antibody therapeutics focused on cancer and autoimmune indications. It includes, but is not limited to: Empasiprubart, a complement inhibitor targeting C2, blocking the function of both the classical and lectin pathways, while leaving the alternative pathway intact, ARGX-119 an antagonist to the MuSK receptor with potential in multiple neuromuscular indications.
About the author
Emily J. Thompson
Emily J. Thompson, a Chartered Financial Analyst (CFA) with 12 years in investment research, graduated with honors from the Wharton School. Specializing in industrial and technology stocks, she provides in-depth analysis for Intellectia’s earnings and market brief reports.
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- Disease Biology Insights: The webinar will feature discussions by the argenx team and leading clinicians on emerging insights into disease biology, particularly the role of autoantibodies as key drivers of disease progression, providing critical theoretical support for clinical research.
- ALKIVIA Clinical Program: The event will also cover the design of the ALKIVIA clinical program and its clinical and commercial opportunities for efgartigimod, emphasizing the drug's potential in treating severe autoimmune diseases.
- Investor Access: The live webcast will be available on the investors section of the argenx website, with a replay accessible for approximately one year, ensuring investors can stay informed about relevant developments.
See More
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- Conference Timing and Location: At the William Blair conference, management will present on June 3 at 12:40 p.m. CT in Chicago, while at the Goldman Sachs conference, they will engage in a fireside chat on June 9 at 4:00 p.m. ET, enhancing interaction with investors.
- Live Webcast and Replay: The presentation will be live-streamed on the investors section of the argenx website, and a replay will be available for approximately 30 days post-presentation, ensuring that investors who cannot attend live can access the information, thereby increasing company transparency.
- Company Background: argenx is a global immunology company committed to improving the lives of people suffering from severe autoimmune diseases, developing and commercializing the first approved neonatal Fc receptor blocker, demonstrating broad potential in multiple serious autoimmune diseases, which reflects its strategic advantage in innovative drug development.
See More
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- Establishing Scientific Standards: With over 400 peer-reviewed publications and patents, MindWalk has established a rare scientific standard in the industry, ensuring a consistent output of clinical-stage assets across multiple therapeutic areas for its partners.
- Biological Intelligence Infrastructure: The HYFT® system and LensAI™ platform, developed as a purpose-built AI architecture, integrate biological pattern recognition technology, enhancing the efficiency and success rate of clinical asset development within MindWalk's antibody discovery engine.
- Strategic Partnerships: MindWalk collaborates with several prominent biopharmaceutical companies, including Annexon Biosciences and argenx, further solidifying its market position and influence in the biopharmaceutical industry.
See More
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- FDA Label Expansion: The U.S. FDA has approved VYVGART and VYVGART Hytrulo for all adult generalized myasthenia gravis (gMG) patients, covering all antibody subtypes, marking a significant advancement in treatment options.
- Clinical Trial Results: In the ADAPT SERON study, patients treated with VYVGART showed statistically significant improvements, with a 3.35-point enhancement in MG-ADL total score at week 4, demonstrating the treatment's effectiveness and sustainability.
- Significant Sales Growth: Argenx reported $1.3 billion in global net sales for the VYVGART franchise in Q1 2026, reflecting a 63% year-over-year increase, indicating strong market demand and product acceptance.
- Broad Market Potential: This approval positions VYVGART as the first treatment available for all gMG patients, expected to further drive sales growth and solidify the company's market position in the rare disease sector.
See More
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- Strong Sales Performance: Argenx reported over $4 billion in global sales last year, indicating Vyvgart's robust market performance, and this label expansion is likely to further drive sales growth and solidify its market leadership.
- Clinical Research Support: The label expansion is backed by the results of the Phase 3 ADAPT SERON study, demonstrating Vyvgart's efficacy for all serotypes of myasthenia gravis patients, which bolstered the FDA's confidence in the approval.
- Collaborative Development Advantage: Vyvgart Hytrulo, the injectable version developed in partnership with Halozyme, leverages Halozyme's technological advantages, which is expected to enhance patient convenience and adherence, further expanding market potential.
See More
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- Indication Expansion: VYVGART and VYVGART Hytrulo received FDA approval for all adult generalized myasthenia gravis (gMG) patients, including anti-AChR-Ab positive, anti-MuSK-Ab positive, anti-LRP4-Ab positive, and triple seronegative patients, marking a significant advancement in addressing the needs of gMG patients.
- Clinical Study Results: In the ADAPT SERON study, patients treated with VYVGART achieved a significant 3.35-point improvement in MG-ADL total score at week 4 (p=0.0068), demonstrating the drug's effectiveness in improving daily living activities and further solidifying its market position.
- Good Safety Profile: VYVGART exhibited good tolerability across all patient types, with safety consistent with the established profile in anti-AChR-Ab positive gMG patients, enhancing physician confidence and simplifying treatment decisions.
- Patient Support Program: argenx launched the My VYVGART Path patient support program to assist patients and healthcare providers in accessing the medication, offering disease education, access support, and financial assistance, reflecting the company's commitment to patient care.
See More
