Adagio Medical Holdings Inc

We are a medical device company focused on developing and commercializing products for the treatment of cardiac arrhythmias with our novel, proprietary, catheter-based Ultra-Low Temperature Ablation ("ULTA") technology, formerly known as Ultra-Low Temperature Cryoablation ("ULTC") technology. Our initial focus is on the treatment of ventricular tachycardia ("VT"). VT is a rapid, abnormal heart rhythm, or arrhythmia, that originates in the heart’s lower chambers, or ventricles, potentially leading to impaired blood flow and, if sustained, VT can be fatal. In the United States, VT-associated sudden cardiac death ("SCD") accounts for approximately 300,000 deaths each year. Radio Frequency ("RF") ablation catheters currently used to treat VT were primarily designed and approved for the treatment of atrial fibrillation ("AF") and are therefore not designed to optimally treat the specifics of the ventricular anatomy and disease. As a result, VT procedures performed with current devices can be overly complex, with sub-optimal outcomes, a factor that has potentially led to limited growth in the market for VT ablations.

Our clinically tested, proprietary ULTA products are purpose-built to treat patients with VT and are designed to address the unique anatomy of the ventricle and the specific needs of the VT patient. Our ULTA approach is built on the hypothesis that large and durable lesions extending through the depth of both diseased and healthy muscular tissue of the ventricle of the heart (ventricular myocardium) is a foundation for improving the effectiveness of VT ablations and patient outcomes. Our differentiated catheters and consoles are designed to create titratable, large, durable, deep lesions within the ventricle through a stable, endocardial – or inside the heart - approach with no required irrigation. In October 2025, we announced completion of enrollment in our FULCRUM-VT Pivotal FDA Investigational Device Exemption ("IDE") study evaluating the vCLAS TM Cryoablation System for ablation of monomorphic ventricular tachycardia (MMVT) in patients with both ischemic and non-ischemic cardiomyopathy. The vCLAS System, which was granted Breakthrough Device Designation by the FDA in April 2025, is built on our proprietary ULTA technology platform and is typically utilized with a double freeze cycle (freeze-thaw-freeze) protocol.

We believe that our purpose-built solution has the potential to drive market growth in ablative treatment of the large, underserved VT patient population.

We have established a robust cadence of clinical data designed to evaluate our technology and gain regulatory approvals of our product portfolio. Preliminary data suggest that our approach to treating VT offers a favorable combination of safety, acute and chronic effectiveness, compared to the current standard of care, including ablations performed using RF and pulsed field ablation ("PFA") energy. Our first-in-human CRYOCURE-VT trial included 64 patients in nine centers in the European Union and Canada. The outcomes of this trial, which were used to support Conformit Europ enne ("CE Mark") approval, include a 0% rate of major adverse events, 94% acute procedural success, 60% freedom from sustained VT and 81% freedom from implantable cardioverter defibrillator ("ICD") shock at six months. Our vCLAS TM . Cryoablation System for VT has obtained European CE Mark approval. In the United States, our 209-patient FULCRUM-VT IDE pivotal clinical trial completed enrollment in October 2025 across 19 centers in the United States and Canada. The study includes patients with both ischemic and non-ischemic (NICM) cardiomyopathies (LVEF=35+/-10%, 33% NICM, 75% with congestive heart failure). In our preliminary acute safety and efficacy results, acute clinical success, defined as non-inducibility of target ventricular arrhythmias, was 97.4%, with all clinically-relevant VTs eliminated in 96.7% of patients tested by post-ablation programmed electrical stimulation. Key safety findings included a 2.4% rate of major adverse events including four (1.9%) peri-procedural deaths, of which one (0.5%) was adjudicated by an independent Clinical Events Committee as definitely related to the investigational device. We plan to share the six-month results of the FULCRUM-VT trial in April 2026 at the Heart Rhythm Society 2026 Conference and to submit the results of this trial to support our application for FDA approval of our vCLAS TM Cryoablation System in the first half of 2026.