Bitcoin miners MARA and CleanSpark have released their latest quarterly financial reports, both showing double-digit declines in revenue. MARA's Q2 2026 revenue was $174.9 million, a 27% year-over-year decrease, with net loss expanding to $611.3 million. CleanSpark's revenue for the third fiscal quarter ending June 30 was $138 million, a 30.5% year-over-year decrease, with a net loss of $239.8 million. Both companies stated that they are continuously investing in expanding their high-performance computing business lines amidst growth in the AI sector and increasing Bitcoin mining difficulty. Following the earnings release, MARA's stock price fell over 5%, and CleanSpark's stock price dropped over 6%.