An Open-Label Safety and Tolerability Study of INCB062079 in Subjects With Advanced Hepatocellular Carcinoma and Other Malignancies

Inclusion Criteria:

- Part 1: HCC; cholangiocarcinoma; or esophageal, nasopharyngeal, or serous ovarian
cancer, regardless of FGF/FGFR status.

- Part 2: Subjects will be enrolled into 1 of 3 cohorts:

- Cohort A: HCC with FGF19 amplification.

- Cohort B: HCC without FGF19 amplification.

- Cohort C: cholangiocarcinoma, esophageal, nasopharyngeal or serous ovarian
cancers (regardless of FGF/FGFR status), or other solid tumor malignancies with
documented FGF19/FGFR4 alteration.

- Has progressed after prior therapy and either a) there is no further effective
standard anticancer therapy available (including subject refusal) or b) is intolerant
to standard anticancer therapy.

- Life expectancy > 12 weeks.

- Eastern Cooperative Oncology Group (ECOG) performance status of 0-1 (Part 1) or 0-2
(Part 2).

- Archival tumor specimen according to protocol-defined criteria.

- Screening bile acid (C4) results must be below the central laboratory ULN.

- Must agree to take cholestyramine while taking INCB062079.

Exclusion Criteria:

- Treatment with other investigational study drug for any indication for any reason, or
receipt of anticancer medications within 28 days before first dose of study drug;
subjects must have recovered from AEs due to previously administered therapies.

- Prior receipt of a selective FGFR4 inhibitor within the last 6 months.

- Laboratory parameters outside the protocol-defined ranges.

- History or presence of an abnormal ECG that in the investigator's opinion is
clinically meaningful.

- Prior radiotherapy within 2 weeks of study treatment. A 1-week washout period is
permitted for palliative radiation to non- central nervous system (CNS) disease with
medical monitor approval.

- History of human immunodeficiency virus infection.

- Untreated brain or CNS metastases or brain/CNS metastases that have progressed.
Subjects with previously treated and clinically stable brain/CNS metastases and who
are off all corticosteroids for ≥ 4 weeks are eligible.

- Chronic or current active infectious disease requiring systemic antibiotic,
antifungal, or antiviral treatment, except concomitant antiviral systemic therapy for
chronic hepatitis B or C.

- Child-Pugh liver function Class B or C.

- History of clinically significant or uncontrolled cardiac disease.

- History of allergic reactions to INCB062079, any of the excipients of INCB062079 or
similar compounds.

- Pregnant or nursing women or subjects expecting to conceive or father children within
the projected duration of the study, starting with the screening visit through 90 days
after last dose of study drug.

- Any medical condition that would in the investigator's judgment interfere with full
participation in the study, including administration of study medication and attending
required study visits; pose a significant risk to the subject; or interfere with
interpretation of study data.