Study of PF-07224826, as a Single Agent or in Combination With Endocrine Therapy in Participants With Breast Cancer and Other Advanced Solid Tumors.

Inclusion Criteria:

* Part 1:

  * Participants with HR-positive HER2-negative locally advanced or metastatic breast cancer.
  * Participants with locally recurrent/advanced or metastatic TNBC.
  * Participants with advanced platinum resistant epithelial ovarian cancer (EOC)/fallopian tube cancer/primary peritoneal cancer (PPC).
  * Other advanced solid tumor types: Tumors other than BC or Ovarian: NSCLC, prostate, endometrial, liposarcoma, or other tumors with cyclin D (CCND) and cyclin E (CCNE) implicated in pathogenesis either by gene amplification or overexpression.
* Part 2 (Arm A): Participants with HR positive HER2 negative locally advanced or mBC (post CDK4/6 inhibitors).
* Part 2 (Arm B): Participants with HR positive HER2 negative locally advanced or mBC (naïve to CDK4/6 inhibitors).
* Eastern Cooperative Oncology Group (ECOG) Performance Status (PS) 0 or 1.
* Adequate Bone Marrow Function

Exclusion Criteria:

* Known active uncontrolled or symptomatic central nervous system (CNS) metastases, carcinomatous meningitis, or leptomeningeal disease as indicated by clinical symptoms, Cerebral edema, and/or progressive growth. Participants with a history of CNS metastases or cord compression are eligible if they have been definitively treated (eg, radiotherapy, stereotactic surgery) and are clinically stable off anticonvulsants and steroids for at least 4 weeks before enrollment and have no evidence of progression at time of study enrollment.
* Participants with advanced/metastatic, symptomatic, visceral spread, that are at risk of life-threatening complications in the short term (eg, including participants with massive uncontrolled effusions \[pleural, pericardial, peritoneal\], pulmonary lymphangitis, and over 50% liver involvement).
* Any other active malignancy within 3 years prior to enrollment, except for adequately treated basal cell or squamous cell skin cancer, or carcinoma in situ.
* Last anticancer treatment within 2 weeks (or 5 half-lives, whichever is shorter), unless the last immediate anticancer treatment contained an antibody-based agent(s) (approved or investigational), then the interval of 4 weeks or 5 half-lives (whichever is shorter) is required prior to receiving the study intervention.