Dianthus Therapeutics FY Conference Summary Company Overview - **Company**: Dianthus Therapeutics (NasdaqCM:DNTH) - **Focus**: Development of clinical-stage autoimmune therapeutics with a best-in-class pipeline targeting patient-friendly, infrequent subcutaneous self-administration [2][3] Key Products and Pipeline Clasibobart - **Description**: A potent classical pathway inhibitor with an eight-week half-life, targeting activated C1s - **Clinical Status**: Positive phase two results disclosed in September, with clinical proof of concept for classical pathway inhibition in Myasthenia Gravis (MG) and Chronic Inflammatory Demyelinating Polyneuropathy (CIDP) [2][4] - **Administration**: 300 mg, 2 ml autoinjector dosed every two or four weeks [3][5] - **Market Potential**: Targeting over 150,000 patients in the U.S. for MG, CIDP, and Multifocal Motor Neuropathy (MMN) [5][6] - **Efficacy Data**: Impressive results with 300 mg every two weeks showing robust, statistically significant efficacy across five measures in MG [6][9] - **Phase 3 Trial**: Discussions with the FDA ongoing, aiming for a trial comparing placebo, Clasibobart every two weeks, and every four weeks [11][12] DNTH212 - **Description**: A bispecific fusion protein targeting BDCA2 and BAFF/APRIL pathways - **Clinical Status**: Currently in phase 1 trials, with plans to prioritize indications such as Systemic Lupus Erythematosus (SLE) and dermatomyositis [25][26] Market Opportunities Myasthenia Gravis (MG) - **Market Size**: Approximately 100,000 patients in the U.S. with ACHR positive MG [5] - **Competitive Advantage**: Clasibobart's mechanism may provide superior efficacy compared to existing C5 inhibitors by preventing pro-inflammatory toxins [10][11] Chronic Inflammatory Demyelinating Polyneuropathy (CIDP) - **Market Need**: High unmet need due to limitations of current treatments like IVIG and FcRns [13][14] - **Efficacy Signals**: Clasibobart showed better efficacy than IVIG in patients refractory to standard treatments [14][15] Multifocal Motor Neuropathy (MMN) - **Market Size**: Estimated 10,000-15,000 patients in the U.S. with a high potential for a blockbuster product due to lack of competition [21][33] - **Competitive Landscape**: Clasibobart is positioned against Empasibobart, with superior potency and a more convenient administration route [22][24] Financial Position - **Cash Reserves**: Approximately $514 million, providing a runway into 2028 [27] Additional Insights - **Trial Design**: Clasibobart's trial design allows for immediate switching from IVIG to Clasibobart, which may yield higher responder rates compared to traditional methods [19][20] - **Market Strategy**: Emphasis on the potential for Clasibobart to be the most convenient and patient-friendly biologic in MG and CIDP [12][13] - **Investor Considerations**: The company highlights the importance of looking at actions and trial designs rather than just statements when evaluating potential success [31][32] Conclusion Dianthus Therapeutics is positioned to make significant advancements in the treatment of autoimmune diseases with its innovative therapies, particularly Clasibobart, which shows promise in multiple indications and has a strong clinical and market strategy. The upcoming phase 3 trial and interim analyses are critical milestones to watch for potential investment opportunities.

Dianthus Therapeutics (DNTH) Conference Summary Company Overview - **Company**: Dianthus Therapeutics - **Lead Program**: DNTH103, an antibody targeting the active form of C1S in the classical pathway of the complement system [3][4] Key Value Inflicting Milestones - **Indications**: Focus on neuromuscular conditions including myasthenia gravis (MG), chronic inflammatory demyelinating polyneuropathy (CIDP), and multifocal motor neuropathy (MMN) [3][4] - **Dosing**: DNTH103 aims for a low volume of 300 mg in a 2 ml auto-injector, self-administered every two weeks [4][7] - **Safety Profile**: Potentially reduced risk of infections compared to existing treatments due to preservation of lectin and alternative pathways [4][5] Competitive Landscape - **Competitors**: Sanofi's angimosotimab and Rilipibart are mentioned as competitors in the C1S inhibitor space [12][13] - **Differentiation**: DNTH103 is positioned as a more potent antibody requiring lower doses compared to Rilipibart, which requires 600 mg every week [16][30] Clinical Development - **Phase II Trials**: Initiated for MG and MMN, with CIDP in a pivotal Phase III program [9][10] - **Data Expectations**: Anticipated data from MG Phase II in Q3/Q4 2025, followed by MMN and CIDP data in 2026 [10][46] Efficacy and Safety - **Efficacy Benchmark**: Targeting efficacy similar to Ultomiris and Soliris, with a primary endpoint of safety and secondary efficacy measures [49][50] - **Market Comparison**: Ultomiris reported $6.5 billion in sales, with a 33% growth attributed to MG patients [54] Study Design and Recruitment - **CIDP Study Design**: Open-label followed by randomized placebo-controlled trial, allowing refractory patients [20][21] - **MG Study Design**: Three arms with a focus on safety and efficacy, aiming for 20 patients per cohort [49] Market Dynamics - **Market Evolution**: The CIDP market has evolved rapidly, with increased comfort among physicians in diagnosing CIDP [36] - **Potential Head-to-Head Studies**: Depending on competitor data, Dianthus may consider conducting head-to-head studies against IVIG [41][44] Other Considerations - **Oral Compounds**: Discussion on a competitor's oral C1S inhibitor, with skepticism regarding its efficacy and safety profile [59][62] - **Investor Sentiment**: Positive investor response to the CIDP program, leading to a successful $230 million PIPE financing [18] Conclusion Dianthus Therapeutics is advancing its lead program DNTH103 with a focus on safety, efficacy, and patient convenience in treating neuromuscular conditions. The competitive landscape is evolving, and the company is well-positioned to capitalize on upcoming clinical data and market opportunities.