MrBeast’s main YouTube channel sits at roughly 516 million subscribers as of early September 2026 and continues adding 100,000–170,000 subs per day on average, driven by consistent long-form videos, Shorts promotion, and broad cultural appeal. Reaching the next round-number milestones by September 30 will depend on whether daily gains hold steady or accelerate with any major releases or cross-platform campaigns in the final three weeks. Historical patterns show the channel has maintained strong momentum even after hitting 500 million in June, though the enormous subscriber base naturally tempers percentage growth rates. Traders watch upload schedules, view velocity on new content, and any announced giveaways or collabs as the primary swing factors that could push totals higher before the deadline.