A Study of Disitamab Vedotin in Previously Treated Solid Tumors That Express HER2

Inclusion Criteria: * Cohort 1: Head and neck cancer (HNC) * Must have pathologically-documented carcinoma of the head and neck with primary tumor site arising from the oral cavity, salivary gland, oropharynx, hypopharynx, and larynx; tumors arising from the nasopharynx are excluded. * Unresectable locally recurrent or metastatic stage disease * Prior therapies: * Participants must have disease progression after treatment with a platinum-based therapy * Cohort 2: Non-small cell lung cancer (NSCLC) * Pathologically documented NSCLC * Unresectable locally-advanced or metastatic stage disease * Prior therapies * Must have progressed during or after a platinum-based therapy for LA/metastatic disease or, within 6 months of platinum-based adjuvant, neoadjuvant, or concomitant chemoradiotherapy for early or locally-advanced stage disease * Must have received prior anti-PD(L)1 therapy, unless contraindicated * Participants with known AGAs must have received appropriate targeted therapy, where available. * No more than 2 prior lines of cytotoxic chemotherapy for advanced disease * Cohort 3: Ovarian Cancer * Pathologically documented epithelial cancers of ovarian, fallopian tube, or peritoneal origin * Unresectable locally-advanced or metastatic stage disease * Prior therapies * Must have platinum resistant disease (6 months or less between the completion of platinum-based treatment and identification of recurrence) * Must not have received more than 4 lines of prior cytotoxic chemotherapies for advanced disease * Participants with known BRCA mutations are permitted, but participants must have received targeted therapy with a PARP inhibitor * May have received prior anti-PD(L)1 therapy * Cohort 4: Endometrial Cancer * Must have pathologically documented adenocarcinoma of the endometrium * Must have unresectable locally-advanced or metastatic stage disease. * Prior therapies * Must have relapsed/progressed after at least one prior platinum-based chemotherapy for recurrent, metastatic or primary unresectable disease * Must not have received more than 3 lines of prior cytotoxic chemotherapies for advanced disease * May have received prior anti-PD(L)1 therapy * HER2 expression of 1+, 2+, or 3+, as determined by local IHC testing on a fresh or archival tumor tissue. Note: Participants with HER2 mutations are eligible. * Measurable disease per RECIST v1.1 criteria as assessed by the investigator * Able to provide formalin-fixed, paraffin-embedded (FFPE) tumor tissue blocks (or freshly sectioned slides) * Eastern Cooperative Oncology Group (ECOG) performance status score of 0 or 1 Exclusion Criteria: * Prior treatment with an MMAE-containing agent. * Known hypersensitivity to any excipient contained in the drug formulation of disitamab vedotin. * History of another invasive malignancy within 2 years before the first dose of study intervention, or any evidence of residual disease from a previously diagnosed malignancy. * Active untreated CNS or leptomeningeal metastasis