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Aqilion today announces positive results from the ARIA-2 clinical study. The study evaluated the pharmacokinetic profile in healthy participants of a novel, water-dissolvable tablet formulation of AQ280, designed for the treatment of eosinophilic esophagitis (EoE) to enable phase 2. The ARIA-2 study was performed as a single-dose randomized, placebo controlled, cross-over study and expanded the dose range compared to the dose range used in Phase 1 (ARIA-1). The results clearly showed that the new formulation exhibits a pharmacokinetic profile very similar to the capsule used in the initial ARIA-1 study, with favorable safety and tolerability profile. The study results enable a transition to phase 2 with a formulation that is specifically adapted to patients with swallowing difficulties. The hallmark of EoE is that patients have serious difficulties in swallowing and often food impaction, and therefore oral therapies need to be designed to facilitate drug intake. Aqilion has developed a formulation that allows EoE patients to take the medication dissolved in water. The primary objective of ARIA-2 was to determine whether the new formulation exhibits a pharmacokinetic profile comparable to the capsule used in the initial Phase 1 study (ARIA-1). The study was conducted in June in healthy participants in the US following an IND approval in May. The ARIA-1 study showed dose dependent changes in biomarkers suggestive of a potent JAK1 inhibitory effect while no detectable JAK 2 effect on reticulocytes was observed. Aqilion is now preparing to initiate Phase 2a and 2b clinical trials in patients diagnosed with EoE across the US, Canada, and Europe. Sarah Fredriksson, CEO of Aqilion, stated, “We are pleased to see the results from this pharmacokinetic bridging study. It is an important milestone to have the formulation ready with EoE patients in focus. Finalizing ARIA-2 now means that we can fully focus on the Phase 2 study. We thank the participants and clinic involved and look forward to advancing AQ280’s clinical development.” For more information, please contact: Sarah Fredriksson, CEO, AQILION AB, + 46 (0)70 261 4575, sarah.fredriksson@aqilion.com

Aqilion AB is pleased to announce the completion of its second Phase 1 clinical study (ARIA-2) in the United States, as part of the AQ280 development program. The ARIA-2 study evaluated the pharmacokinetic profile of a novel, water-dissolvable tablet formulation of AQ280, designed for the treatment of eosinophilic esophagitis (EoE). The final participant has completed the study, and results are expected in October. EoE patients have difficulties swallowing and oral therapies need to be adapted to facilitate their drug intake. Aqilion have developed a formulation that allows the EoE patients to drink the medicine like water. The primary objective of ARIA-2 was to determine whether the new formulation exhibits a pharmacokinetic profile comparable to the capsule used in the initial Phase 1 study (ARIA-1). The study was conducted in June with healthy participants in the USA and the results are expected in October. Thereafter Aqilion plans to initiate a Phase 2 (a and b) clinical trials in patients diagnosed with EoE across the US, Canada, and Europe. Sarah Fredriksson, CEO of Aqilion, stated, “We have completed the clinical part of the pharmacokinetic study with our new AQ280 formulation, which is an important milestone. Developing a formulation tailored for patients with difficulty swallowing is strategically extremely important. We thank the participants and clinic involved and look forward to advancing AQ280’s clinical development.” For more information, please contact: Sarah Fredriksson, CEO, AQILION AB, + 46 (0)70 261 4575, sarah.fredriksson@aqilion.com 20250718_Press release_Aqilion finalizes the eosinophilic esophagitis specific formulation pharmacokinetic study with the drug candidate AQ280_AQ