A Study of Retatrutide (LY3437943) on Renal Function in Participants With Overweight or Obesity and Chronic Kidney Disease With or Without Type 2 Diabetes

Inclusion Criteria: * Have a body mass index (BMI) ≥27 kilogram/square meter (kg/m²) * Have either * no T2D with an HbA1c \< 6.5% or * have T2D with an HbA1c ≤ 9.5% and treated with diet and exercise only or with stable doses of up to 3 oral antihyperglycemic medications, with or without basal insulin for at least 90 days before screening. * Have been diagnosed with chronic kidney disease (CKD). Exclusion Criteria: * Have a self-reported change in body weight \>5 kilogram (kg) (11 pounds) within 90 days before screening. * Have used in 90 days before the screening any of the following antihyperglycemic class: Dipeptidyl Peptidase IV (DPP4) inhibitors, amylin analogs, glucagon-like peptide-RA (GLP-RA), gastric inhibitory polypeptide (GIP)/GIP-1 RA, and short acting or rapid acting insulins or U500 Insulin * Have a prior or planned surgical treatment for obesity * Have Type 1 Diabetes (T1D) * Have acute or chronic hepatitis * Have a history of malignant disease within 5 years before screening.