Study of an Anti-HER3 Antibody, HMBD-001, With or Without Chemotherapy in Patients With Solid Tumors Harboring an NRG1 Fusion or HER3 Mutation

Inclusion Criteria: * Ability to understand and be willing to sign an informed consent form * Males and females aged over 18 years * Eastern Cooperative Oncology Group (ECOG) status of 0 to 1 * Histologic or cytologic evidence of an advanced malignant solid that is resistant/refractory to standard systemic therapy, or for which there is no standard systemic therapy or reasonable therapy in the physician's judgment likely to result in clinical benefit, or the participant has demonstrated to be intolerable to such therapy, or if such therapy has been refused by the participant * Arms A, B and C: Cancer harboring an NRG1 gene fusion with EGF-like domain; Arm A: Participants with locally advanced or metastatic pancreatic adenocarcinoma that have not received prior treatment with gemcitabine or nab-paclitaxel and /or have not received more than 2 lines of systemic therapy for advanced disease; Arm B: Participants with locally advanced or metastatic non-small cell lung cancer that have not received prior treatment with docetaxel and /or have not received more than 2 lines of systemic therapy for advanced disease; Arm C: Participants must not be eligible to participate in Arm A or B * Arm D: Cancer harboring selected HER3 mutations limited to the extracellular domain. * Have an estimated life expectancy of at least 3 months * Have an archival tumour sample available or have a site of disease amenable to biopsy and be willing to undergo a biopsy prior to the receipt o…