An Investigational Study of ESK-001 in Participants With Normal Renal Function and Participants With Mild, Moderate, and Severe Impaired Renal Function

Key Inclusion Criteria for All Participants: * Body mass index between 18.0 and 40.0 kg/m2 Key Inclusion Criteria for Participants with Renal Impairment: * Diagnosis of chronic, stable renal function in the 6 months prior to dosing, as determined by the investigator, based on medical history or eGFR, and not requiring dialysis Key Exclusion Criteria for All Participants: * History of stomach or intestinal surgery or resection that would potentially alter absorption and/or excretion of orally administered drugs (uncomplicated appendectomy, cholecystectomy, and hernia repair are allowed). Key Exclusion Criteria for Participants with normal Renal function: -Significant history or clinical manifestation of any metabolic, allergic, dermatological, hepatic, renal, hematological, pulmonary, cardiovascular, gastrointestinal, neurological, respiratory, endocrine, or psychiatric disorder, as determined by the investigator or designee. Key Exclusion Criteria for Participants with Renal Impairment: \- History of any uncontrolled or unstable hepatic, hematological, gastrointestinal, neurological, endocrine, or psychiatric disorder, as determined by the investigator or designee, within 6 months prior to screening.