Study of ADG206 in Subjects With Advanced/Metastatic Solid Tumors

Inclusion Criteria:

* Eastern Cooperative Oncology Group (ECOG) performance status ≤1.
* Subjects with advanced or metastatic solid tumors (except thymic tumors), which have progressed after all standard therapies, or no further standard therapies exists.
* At least 1 measurable lesion per Response Evaluation Criteria in Solid Tumors version 1.1 (RECIST 1.1).
* Adequate organ function.
* Woman of childbearing potential must agree to use 2 methods of acceptable contraception from screening until 6 months after the last dose of study drug.
* Male subjects who are sexually active with a female partner of childbearing potential must agree to use a barrier contraception.

Exclusion Criteria:

* Subjects within washout period of other anti-tumor therapies. .
* History of prior malignancy other than the cancer under treatment in the study.
* Major trauma or major surgery within 4 weeks before the first dose of study drug.
* Serious nonhealing wound, ulcer, or bone fracture.
* History of significant immune-mediated AE.
* Central nervous system (CNS) disease involvement.
* Any evidence of underlying severe liver dysfunction.
* Prior organ allograft transplantations or allogeneic bone marrow, cord blood or peripheral blood stem cell transplantation.
* Clinically significant cardiac disease with insufficient cardiac function.
* Evidence of active uncontrolled viral, bacterial, or systemic fungal infection.
* Known positive test result for human immunodeficiency virus (HIV) or acquired immune deficiency syndrome (AIDS).
* Infection of hepatitis B virus (HBV), or hepatitis C virus (HCV) (unless the disease is clinically controlled) .
* History or risk of autoimmune disease.
* Subjects with active severe lung infection or with a history of interstitial lung diseases, noninfectious pneumonitis, active pulmonary tuberculosis, or evidence of active pneumonitis. Clinically significant and unmanageable ascites defined as requiring constant therapeutic paracentesis.
* Any serious underlying issue that would limit compliance with study requirements, impair the ability of the subject to understand informed consent.
* Known hypersensitivity, allergies, or intolerance to immunoglobulins or to any excipient contained in ADG206.
* Pregnant, lactating, or breastfeeding.