Riot Platforms (RIOT), MARA Holdings (MARA), and Hut 8 Corp (HUT) are drawing attention in the Bitcoin mining sector this week. Riot Platforms reported Q3 2025 earnings with $180.2 million in revenue and $104.5 million in net income, exceeding market expectations. Despite a 17% decline in its stock price this month, Riot remains a top global Bitcoin miner. MARA Holdings, ranked as the sixth-largest Bitcoin miner, achieved a 92% year-over-year revenue increase and boosted its Bitcoin holdings by 98% to 52,850 BTC. However, its stock has dropped 32%. Meanwhile, Hut 8 Corp reported a 91% revenue increase and a reduced Q3 loss, leading to a 14% rise in its stock price in recent pre-market trading.