DF1001-001 is a study of a new molecule that targets natural killer (NK) cells and T-cell
activation signals to specific receptors on cancer cells. The study will occur in two phases.
The first phase will be a dose escalation phase, enrolling patients with various types of
solid tumors that express human epidermal growth factor receptor 2 (HER2). The second phase
will include a dose expansion using the best dose selected from the first phase of the study.
Multiple cohorts will be opened with eligible patients having either HER2 activated non-small
cell lung cancer, hormone receptor (HR) positive HER2 negative metastatic breast cancer, or
HER2 positive metastatic breast cancer. DF1001-001 will be administered as monotherapy or in
combination; combinations are DF1001 + nivolumab, DF1001 + Nab paclitaxel, and DF1001 +
sacituzumab govitecan-hziy.

This is a Phase 1/2, open-label, non-randomized, 4-part Phase 1 trial to determine the safety
profile and identify the maximum tolerated dose (MTD) and/or recommended Phase 2 dose (RP2D)
of INBRX 106 administered as a single agent or in combination with the anti-PD-1 checkpoint
inhibitor (CPI) pembrolizumab (Keytruda).