This is a multicenter, open-label, dose-escalation/dose-expansion Phase 1 clinical study to investigate the safety, tolerability, PK profile, pharmacodynamics, and preliminary clinical efficacy of INCB106385 when given as monotherapy or in combination with INCMGA00012 in participants with selected CD8 T-cell-positive advanced solid tumors including SCCHN, NSCLC, ovarian cancer, CRPC, TNBC, bladder cancer, and specified GI malignancies (defined as CRC, gastric/GEJ cancer, HCC, PDAC, or SCAC)

Inclusion Criteria:

• Ability to comprehend and willingness to sign an ICF.
• Willing and able to conform to and comply with all Protocol requirements.
• Histologically or cytologically confirmed advanced/metastatic SCCHN, NSCLC, ovarian cancer, TNBC, CRPC, bladder cancer, and specified GI malignancies (defined as CRC, gastric/GEJ cancer, HCC, PDAC, or SCAC) that progressed after treatment with available therapies (including anti PD-(L)1 therapy (if applicable).
• Willingness to undergo pre- and on-treatment tumor biopsy.
• Have CD8 T-cell-positive tumors.
• Presence of measurable disease according to RECIST v1.1.
• ECOG performance status 0 to 1.
• Life expectancy > 12 weeks.
• Willingness to avoid pregnancy or fathering children based.
• Acceptable laboratory parameters

Exclusion Criteria:

• Clinically significant cardiac disease.
• Known or active CNS metastases and/or carcinomatous meningitis.
• Active or inactive autoimmune disease or syndrome that required systemic treatment in the past 2 years or receiving systemic therapy for an autoimmune or inflammatory disease..
• Diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy (doses > 10 mg daily of prednisone or equivalent) or any other form of immunosuppressive therapy within 7 days before the first dose of study treatment.
• Known additional malignancy that is progressing or requires active treatment,or history of other malignancy within 2 years of the first dose of study treatment.
• Has not recovered to ≤ Grade 1 from toxic effects of prior therapy and/or complications from prior surgical intervention before starting study treatment.
• Evidence of interstitial lung disease, history of interstitial lung disease, or active, noninfectious pneumonitis.
• Immune-related toxicity during prior immune therapy for which permanent discontinuation of therapy is recommended, or any immune-related toxicity requiring intensive or prolonged immunosuppression to manage.
• Any prior chemotherapy, biological therapy, or targeted therapy to treat the participant's disease within 5 half-lives or 28 days (whichever is shorter) before the first dose of study treatment.
• Any prior radiation therapy within 28 days before the first dose of study treatment.
• Undergoing treatment with another investigational medication or having been treated with an investigational medication within 5 half-lives or 28 days (whichever is shorter) before the first dose of study treatment.
• Concomitant treatment with strong CYP3A4 inhibitors or inducers.
• Receipt of a live vaccine within 30 days of the first dose of study treatment.
• Infection requiring parenteral antibiotics, antivirals, or antifungals within 1 week of the first dose of study treatment.
• Evidence of HBV or HCV infection or risk of reactivation.
• Known history of HIV (HIV 1/2 antibodies).
• History of organ transplant, including allogeneic stem-cell transplantation.
• Known hypersensitivity or severe reaction to any component of study drug(s) or formulation components.
• Presence of a gastrointestinal condition that may affect drug absorption.
• Is pregnant or breastfeeding or expecting to conceive or father children within the projected duration of the study.
• Any condition that would, in the investigator's judgment, interfere with full participation in the study,pose a significant risk to the participant; or interfere with interpretation of study data

Incyte shares data with qualified external researchers after a research proposal is submitted. These requests are reviewed and approved by a review panel on the basis of scientific merit. All data provided is anonymized to respect the privacy of patients who have participated in the trial in line with applicable laws and regulations.

The trial data availability is according to the criteria and process described on https://www.incyte.com/our-company/compliance-and-transparency

Data will be shared after the primary publication or 2 years after the study has ended for market authorized products and indications.

Data from eligible studies will be shared with qualified researchers according to the criteria and process described in the Data Sharing section of the www.incyteclinicaltrials.com website. For approved requests, the researchers will be granted access to anonymized data under the terms of a data sharing agreement.

Open Label