A Study of KIVU-107 in Participants With Locally Advanced or Metastatic Solid Tumors

This is a 2-part, first-in-human, open-label study to determine the safety and tolerability of KIVU-107, a PTK7-directed antibody-drug conjugate, in participants with locally advanced or metastatic solid tumors.

Part A: The primary objective of Part A of this study is to evaluate the safety and tolerability of KIVU-107 and to determine the maximum tolerated dose (MTD)/Recommended Dose for Expansion (RDE). Part B: The primary objective of Part B of this study is to confirm the safety and tolerability of KIVU-107 at the RDE.

Inclusion Criteria: * Male or female ≥18 years of age * No therapy of proven efficacy exists for the tumor * Pathologically or histologically documented diagnosis of advanced / metastatic solid tumor malignancy that is resistant to standard therapy or for which no standard therapy is available. * Adequate bone marrow, kidney, and liver function * Measurable disease using RECIST v1.1 * ECOG 0 or 1 * Life expectancy ≥ 3 months Exclusion Criteria: * Prior treatment with any ADC with topoisomerase 1 inhibitor payload * Any PTK7 - targeted therapy * Uncontrolled cardiovascular disease * Active Hepatitis B, Hepatitis C, or HIV infection * History of interstitial lung disease * Major surgery, radiation therapy, or systemic anti-cancer within 3 weeks of study treatment start.