ABBV-085, an Antibody Drug Conjugate, in Subjects With Advanced Solid Tumors

Inclusion Criteria: 1. Participants with advanced solid tumor that is not amenable to surgical resection or other approved therapeutic options. 2. Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 to 2. 3. Participants must have measurable disease per Response Evaluation Criteria In Solid Tumors (RECIST) version 1.1 or disease evaluable by assessment of tumor antigens: \- Participants with non-evaluable or non-measurable cancer are eligible if they have a confirmed increase in tumor antigens \>=2 x upper limit of normal (ULN). 4. All participants must consent to provide archived diagnostic formalin-fixed paraffin embedded (FFPE) tumor tissue and on study biopsies. 5. Participant has adequate bone marrow, renal, hepatic and cardiac function. 6. Women of childbearing potential must have a negative serum pregnancy test within 14 days prior to initiation of treatment. Exclusion Criteria: 1. Participant has received anticancer therapy or any investigational therapy within a period of 21 days prior to the first dose of ABBV-085. 2. Uncontrolled metastases to the central nervous system (CNS). Participants with brain metastases are eligible provided they have shown clinical and radiographic stable disease for at least 4 weeks after definitive therapy and have not used steroids for at least 4 weeks prior to first dose of ABBV-085. 3. Unresolved adverse events \>= Grade 2 from prior anticancer therapy, except for alopecia. 4. Participant has ongoing hemolysis. 5. Major surgery within \<=28 days prior to the first dose of ABBV-085. 6. Clinically significant uncontrolled condition(s). 7. Participant has history of major immunologic reaction to any auristatin-based and /or Immunoglobulin G (IgG) containing agent.