A Study to Learn About the Study Medicine Called PF-08032562 in People With Advanced or Metastatic Solid Tumors

The purpose of this study is to learn about the safety and effects of the study medicine when given alone or together with other anti-cancer therapies. Anti-cancer therapy is a type of treatment to stop the growth of cancer. This study also aims to find the best amount of study medication. This study is seeking participants that have advanced or metastatic breast cancer (BC), or advanced or metastatic colorectal cancer (CRC). All participants in this study will take the study medication (PF-08032562) as pill by mouth. This will be repeated for 28-day cycles. Depending on which part of the study participants are enrolled into, they will receive the study medication PF-08032562 alone or in combination with other anti-cancer medications. The study medication (PF-08032562) will be taken by mouth (PO) in combination with other anti-cancer medications given in the study clinic by intramuscular (IM) injection into the muscle or intravenous (IV) infusion that is directly injected into the veins at different times (depending on the treatment) during the 28-day cycle. The study may also test different schedules.

NCT Number	NCT07318805
Lead Sponsor	Pfizer
Conditions	Advanced Breast Cancer, Metastatic Breast Cancer (HR+/ HER2-), Colorectal Cancer, Metastatic Colorectal Adenocarcinoma, Triple Negative Breast Cancer
Enrollment	260 participants
Start Date	2025-12-23
Primary Completion	2029-04-14 (estimated)
Study Completion	2030-04-14 (estimated)
Updated on ClinicalTrials.gov	2026-07-22