Advanced or Metastatic Solid Tumors – ALX Oncology ALX2004-01

This study consists of Phase 1a Dose finding, comprising of Dose Escalation portion followed by Dose Exploration, and a Phase 1b Dose Expansion. The study will enroll previously treated advanced or metastatic non-small cell lung cancer (NSCLC), head and neck squamous cell carcinoma (HNSCC), esophageal squamous cell carcinoma (ESCC) and colorectal cancer (CRC). Up to 170 patients are expected to be enrolled in the study.

Inclusion Criteria:

• Participants with locally advanced, recurrent or metastatic histologically confirmed HNSCC, NSCLC, ESCC, CRC; locally advanced or recurrent disease must not be amenable to resection with curative intent
  1. Dose Escalation: Participants who have relapsed or progressed following prior anticancer therapy in the advanced/metastatic setting and for whom no approved or standard therapy is available.
  2. Dose Exploration and Dose Expansion: The following tumor-specific criteria also apply. These cohorts will include all or a subset of these tumors.

HNSCC – Received no more than 3 prior lines of therapy in the advanced or metastatic setting

NSCLC – For participants with a targetable molecular alteration: received appropriate standard targeted therapy and no more than 2 prior lines of systemic chemotherapy in the advanced/metastatic setting. For participants without a targetable molecular alteration: received platinum-based chemotherapy and CPI (in combination or separately), and have received no more than 2 prior lines of systemic chemotherapy in the advanced/metastatic setting

ESCC – Received no more than 3 prior lines of therapy in the advanced/metastatic setting

CRC – For participants with a targetable molecular alteration (including dMMR or MSI-H): Received appropriate standard therapy for the alteration, at least 2 prior lines of systemic chemotherapy, and no more than 4 prior lines of therapy in the advanced/metastatic setting. For participants without a targetable molecule alteration: Received at least 2 prior lines of systemic chemotherapy (including an oxaliplatin-based chemotherapy), vascular endothelial growth factor (VEGF)-based therapy, and no more than 4 prior lines of therapy in the advanced/metastatic setting.

• Adequate Bone Marrow Function
• Adequate Renal & Liver Function
• Adequate Performance Status