Extending the Boundaries of Targeted Cancer Therapies with Radio-DARPins and Next-Gen Immune Cell Engagers Q3 Financials October 30, 2025 Nasdaq, SIX Swiss Exchange: MOLN Disclaimer This presentation contains forward looking statements. Any statements contained in this presentation that do not describe historical facts may constitute forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995, as amended, including without limitation: implied and express statem ...

IND application filed for MP0712, the Company’s lead Radio-DARPin candidate targeting DLL3 and co-developed with Orano Med, with Phase 1 initiation expected before year end 2025 First patient images from MP0712 compassionate care program to be presented at TRP in November; additional programs planned for 2026, including MP0726 targeting mesothelin. Updated data from Phase 1/2a trial of MP0533, a multispecific T cell engager for AML, to be presented at ASH in December Protocol approved for Phase 2 investigat ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the Month of August 2025 Commission File Number: 001-40488 MOLECULAR PARTNERS AG (Exact name of registrant as specified in its charter) Wagistrasse 14 8952 Zürich-Schlieren Switzerland Telephone: +41 447557700 (Address of registrant's principal executive offices) Indicate by check mark whether the registrant files or ...

Core Insights - Molecular Partners AG is making significant progress in its clinical programs, particularly with MP0712 and MP0533, with key milestones expected in the near future [2][6] - The company has appointed Martin Steegmaier, Ph.D., as Chief Scientific Officer, enhancing its leadership team [2][15] - Financially, the company is in a strong position with cash reserves projected to last until 2028 [2][19] Research & Development Highlights - MP0533 is in a Phase 1/2a trial for acute myeloid leukemia, showing promising results with over 30% of evaluable patients achieving a clinical response [3][4] - The dosing regimen for MP0533 has been optimized to enhance patient responses, with initial data from cohort 9 expected in Q4 2025 [5][6] - MP0712, a Radio-DARPin therapy for small cell lung cancer, is preparing for an IND filing, with initial clinical data anticipated in H1 2026 [8][9] Corporate Governance Highlights - The appointment of Martin Steegmaier, Ph.D., as CSO is aimed at strengthening the company's focus on oncology drug development [15] - A strategic review led to a planned reduction of up to 40 positions, which is expected to improve operational efficiency and extend the cash runway into 2028 [16] Financial and Business Outlook - For 2025, the company expects total operating expenses between CHF 55-65 million, with a significant portion being non-cash costs [18] - As of June 30, 2025, cash and cash equivalents totaled CHF 114 million, sufficient to fund operations into 2028 [19]

Core Viewpoint - Molecular Partners AG has appointed Martin Steegmaier, Ph.D., as Chief Scientific Officer (CSO), effective October 1, 2025, to enhance its oncology drug development efforts, particularly in DARPin therapeutics [1][2]. Company Overview - Molecular Partners AG is a clinical-stage biotech company focused on developing DARPin therapeutics, which are custom-built protein drugs aimed at addressing medical challenges that other drug modalities cannot effectively tackle [6]. - The company has a pipeline that includes various programs in pre-clinical and clinical development, with a primary focus on oncology [6]. Leadership Appointment - Martin Steegmaier brings extensive experience in oncology drug development from previous roles at Roche, MorphoSys, Boehringer Ingelheim, and SOTIO Biotech, where he led the development of a broad pipeline of oncology programs [1][3][2]. - The CEO of Molecular Partners, Patrick Amstutz, expressed confidence that Steegmaier's expertise will significantly contribute to the company's research organization and the advancement of its targeted DARPin therapeutics [2]. Educational Background - Martin Steegmaier holds a Ph.D. in biochemistry from the University of Basel and an MBA from the Edinburgh Business School, which complements his extensive experience in the biotech and pharmaceutical sectors [4]. Future Directions - The company aims to innovate and advance its pipeline of targeted DARPin therapeutics, including Radio-DARPins and Switch-DARPins, which are designed for logic-gated immune cell activation [2][5].

Radio-DARPin Therapy & MP0712 - Molecular Partners is focused on oncology with differentiated assets like MP0533 and MP0712, addressing unmet medical needs[8] - The company has CHF ~149 million, ensuring funding into 2027[8, 110] - MP0712, a 212Pb-DLL3 targeted radiotherapeutic, addresses the critical unmet need in SCLC, where >85% of patients express DLL3[36, 39] - Preclinical data shows MP0712 induces complete tumor regression in ~70% of mice at 4x 10µCi and ~20% of mice at 8x 5µCi in the NCI-H82 tumor model at day 63[45] - MP0712 clinical development strategy includes Phase 0 imaging studies and Phase 1 dose escalation studies starting in H2 2025, with initial clinical data expected by YE[54] Next-Gen Immune Cell Engagers & MP0533 - MP0533 is a tetra-specific T-cell engager designed to kill AML cells by targeting CD33, CD123, and CD70[69, 77] - Preliminary data from the MP0533 Phase 1/2a study shows 4 responders reported in DR 1-7 with manageable safety[80] - An improved MP0533 exposure was achieved at DR 8 with a steeper and denser step-up dosing regimen[82, 86] Switch-DARPin Platform - The Switch-DARPin platform aims to overcome limitations of current T cell engagers by enabling targeted and conditional activation of immune cells[94, 101] - Preclinical data shows the EpCAM-MSLN-CD2/CD3 Switch induces tumor regression more efficiently than a MSLN-CD3 engager (Tritac)[107]

Company Overview - Molecular Partners is a clinical-stage biotech company pioneering DARPin therapeutics for patients, with operations in Switzerland and the US[8] - The company is well financed into 2027 with approximately CHF 149 million[8] (Note: The outlook section mentions CHF ~131 million[95], so there might be a slight discrepancy) - Molecular Partners has proprietary DARPin platforms, including Radio-DARPins and Switch / T cell engagers[8] Pipeline Highlights - MP0712 (Radio-DARPin Therapy targeting DLL3) is in co-development for SCLC & NECs[9] - The co-development agreement with Orano Med includes up to 10 RDT programs, including MP0712[9] - MP0533 (Next-Gen Immune Cell Engager) is being developed for r/r AML and AML/MDS[9] MP0712 (Radio-DARPin Therapy) - MP0712 is the first 212Pb-DLL3 targeted radiotherapeutic for SCLC, where >85% of SCLC patients express DLL3[25] - Preclinical studies show MP0712 induces complete and durable tumor regression in the NCI-H82 tumor model at 10µCi injected every week[28] - Phase 1 study is expected to start in H2 2025, with initial safety and efficacy data in 2026[33] MP0533 (Tetra-specific T-cell Engager for AML) - MP0533 is designed to induce T cell-mediated killing preferentially when 2 or 3 AML-associated antigens are co-expressed[66] - Preliminary data from the Phase 1/2a study shows encouraging blast reduction, particularly in patients with lower disease burden at baseline[75] - Improved MP0533 exposure was observed at DR 8 with a steeper and denser step-up dosing regimen[78]

Core Insights - Molecular Partners AG and Orano Med have announced the launch of MP0726, a Radio-DARPin candidate targeting mesothelin (MSLN), with preclinical data to be presented at the 2025 Annual Meeting of the Society of Nuclear Medicine and Molecular Imaging [1][2] Group 1: Product Development - MP0726 demonstrates high affinity and selectivity for the membrane-proximal domain of MSLN, showing a tumor accumulation of up to 34% and a tumor to kidney ratio of up to 4.5 in vivo [2][3] - The candidate is designed to target ovarian cancer, leveraging the unique properties of DARPins to selectively bind to MSLN, which is highly expressed in tumors but lower in healthy tissues [3][8] - MP0726 is the second Radio-DARPin program to enter preclinical development, following MP0712, which targets DLL3 and is set to begin dosing in a Phase 1 study in the US in the second half of 2025 [6] Group 2: Strategic Collaboration - The collaboration between Molecular Partners and Orano Med has shown significant progress, highlighting the effectiveness of their joint R&D efforts in developing differentiated clinical candidates [4][5] - Orano Med's capabilities in R&D and manufacturing, along with a virtually unlimited supply of the starting isotope, position it uniquely to support the development of these new therapies [4] Group 3: Company Background - Molecular Partners AG is a clinical-stage biotech company focused on developing DARPin therapeutics, with oncology as its main area of focus [9] - Orano Med specializes in targeted alpha-particle therapies using lead-212 (Pb), with its most advanced asset, AlphaMedix, having received Breakthrough Designation from the FDA in 2024 [10]

Core Viewpoint - Molecular Partners AG announced positive updated data from a Phase 1/2a trial of its tetraspecific T-cell engager MP0533 for relapsed/refractory acute myeloid leukemia (AML) at the EHA Congress in Milan [1][2] Group 1: Trial Results - In cohort 8, 3 out of 8 evaluable patients (over 30%) achieved a clinical response after the first cycle, including 1 complete response and 2 complete responses with partial hematologic recovery [3] - Patients in cohort 8 maintained exposure to MP0533 for over 4 days within the predicted therapeutic range, with 5 out of 8 patients showing more than 50% blast reduction [4] - The safety profile of MP0533 was deemed acceptable after the adjustment of the target dose in cohort 8 [9] Group 2: Dosing Regimen - Cohort 8 implemented a higher starting dose and an additional day of dosing, reaching the target dose by day 12 instead of day 15, which contributed to improved clinical responses [3][6] - The amended protocol for cohort 9 includes further acceleration of the step-up dosing, increased frequency of dosing, and the introduction of anti-CD20 premedication to enhance therapeutic exposure and response duration [7][9] - Initial data from cohort 9, which is currently dosing patients, is expected in the second half of 2025 [8] Group 3: Company Overview - Molecular Partners AG is a clinical-stage biotech company focused on developing DARPin therapeutics, with oncology as its main area of focus [10] - The company was founded in 2004 and operates in both Zurich, Switzerland, and Concord, Massachusetts, USA [10]

Core Insights - Molecular Partners AG is undergoing a strategic review to enhance operational efficiency and focus on advancing its clinical assets, resulting in a workforce reduction of up to 40 positions, approximately 24% of total staff [1][2][4] Group 1: Strategic Review and Workforce Reduction - The company has initiated a strategic review aimed at increasing efficiency and sharpening focus on clinical assets, leading to a potential reduction of up to 40 positions [1][4] - The decision to reduce workforce is part of a plan to extend the company's cash runway into 2028, beyond the previous guidance of 2027 [4][7] - A consultation process with employees has begun in accordance with Swiss employment law, and support will be provided to affected employees, including severance packages and job-seeking assistance [3][4] Group 2: Clinical Development Focus - The company is prioritizing the development of clinical assets MP0533 and MP0712, which are expected to provide significant value for patients and shareholders [2][4] - Clinical data from both MP0533 and MP0712 is anticipated in the second half of 2025, maintaining previously announced timelines [4][7] - The strategic review identified redundancies primarily in research and associated functions, allowing for a more focused approach to clinical development [4] Group 3: Financial Outlook - The workforce reduction is expected to lead to cost savings that will become fully effective by early 2026 [3][4] - The company plans to report its half-year financials on August 25, 2025, which will provide further insights into its financial health and operational adjustments [4]