Arvinas (ARVN) and Pfizer (PFE) announced detailed results from the Phase 3 VERITAC-2 clinical trial evaluating vepdegestrant monotherapy versus fulvestrant in adults with estrogen receptor-positive, human epidermal growth factor receptor 2-negative advanced or metastatic breast cancer, MBC, whose disease progressed following prior treatment with cyclin-dependent kinase, CDK, 4/6 inhibitors and endocrine therapy. These data, which were highlighted in the American Society of Clinical Oncology press briefing and selected for Best of ASCO, will be presented today in a late-breaking oral presentation and have been simultaneously published in the New England Journal of Medicine. In the trial, vepdegestrant demonstrated a statistically significant and clinically meaningful improvement in progression-free survival, PFS, among patients with an estrogen receptor 1, ESR1, mutation, reducing the risk of disease progression or death by 43% compared to fulvestrant. The median PFS, as assessed by blinded independent central review, BICR, was 5.0 months with vepdegestrant versus 2.1 months with fulvestrant. Investigator-assessed PFS was consistent with the BICR-assessed PFS. In patients with ESR1 mutations, vepdegestrant demonstrated a consistent PFS benefit over fulvestrant across all pre-specified subgroups. The trial did not reach statistical significance in improvement in PFS in the intent-to-treat population, with a median PFS of 3.7 months for vepdegestrant versus 3.6 for fulvestrant.