Study to Assess the Efficacy and Safety of Atuliflapon in Moderate-to-Severe Uncontrolled Asthma

The study will enroll participants with moderate to severe uncontrolled asthma who are on low-dose inhaled corticosteroid (ICS) - a long-acting beta-agonist (LABA) or medium-to-high-dose ICS with or without LABA background treatment. The study will be initiated by Lead-in pharmacokinetics (PK) cohort in asthma participants. Participant will be randomised globally, including participants in Lead-in PK cohort (2 arms) and in Part 1 of the study (2 arms). In the Lead-in PK cohort, participants will be randomised to Atuliflapon or placebo (recruitment completed). In Part 1 of the study, participants will be stratified by geographical region, and grouped based on high or low levels of biomarker at screening (Visit 1).