There were 487 exhibitor booths at the American Society of Clinical Oncology (ASCO)’s 2026 annual meeting, held in Chicago’s McCormick Place. Fierce Pharma Marketing attempted to see each one. | There were 487 booths at the American Society of Clinical Oncology (ASCO)’s 2026 annual meeting in Chicago’s McCormick Place. Fierce Pharma Marketing attempted to see them all.