Multithreading is the practice of building relationships with multiple stakeholders across different functions and levels of seniority within a prospect organization. Single-threaded deals — where the rep's only contact is one champion — are extremely fragile: if that person leaves, goes cold, or loses internal influence, the deal dies. Multithreaded deals survive personnel changes, surface political dynamics that single-threaded reps miss, and accelerate consensus-building by reaching decision-makers through multiple paths simultaneously.