Shares of the Nasdaq-listed Bitcoin mining company CleanSpark surged by over 5% on Friday following the announcement of a notable increase in production for September.
CleanSpark concluded the month with a total of 13,011 BTC in its treasury, having reported significant improvements in both output and operational efficiency year-on-year. For September 2025, the company disclosed a 27% increase in Bitcoin production compared to the same month last year, with a total of 629 BTC mined. It sold 445 BTC for approximately $48.7 million, averaging a price of $109,568 per Bitcoin.
The company reported a 26% year-on-year improvement in fleet efficiency, achieving an average operating hashrate of 45.6 EH/s during the month.
To bolster financial self-sufficiency, CleanSpark has been liquidating portions of its Bitcoin production since April. The company also introduced an institutional Bitcoin trading desk for better sales facilitation. In August, it reported generating $60.7 million from selling 533.5 BTC.
After the latest production report, CleanSpark’s shares on Nasdaq climbed by 5.28%, contributing to a cumulative gain of over 23% for the week, as reported by Yahoo Finance.
In September, the combined market capitalization of 15 major publicly traded Bitcoin miners reached an all-time high of $58.1 billion, significantly up from $41.6 billion in August and more than double the figure of $19.9 billion recorded in March, according to an October 1 report from The Miner Mag.
CleanSpark shares performance. Source: Yahoo Finance
Related: Bitcoin miner accumulation hits fastest pace since 2023 rally
Bitcoin Mining Under Pressure
Despite a strong interest from investors in publicly traded mining companies, the industry is grappling with rising energy costs and the possibility of tariffs on imported mining equipment.
In August, The Miner Mag highlighted that US Customs and Border Protection claimed some of CleanSpark’s mining equipment from 2024 was fabricated in China, which might impose potential tariff liabilities of up to $185 million on the company.
Iris Energy (IREN), the largest Bitcoin miner by market capitalization, is also engaged in a separate $100 million tariff dispute with the agency.
In August, reports indicated that the effective duty on machinery produced in China stood at 57.6%, while mining devices from Indonesia, Malaysia, and Thailand were facing tariffs of 21.6%.
Furthermore, Bitcoin mining difficulty reached record heights in September and October, necessitating miners to consume more computational power and energy to extract the same yield of Bitcoin.
Bitcoin mining difficulty over 3 years. Source: Coinwarz.com
Reference to Magazine: Financial nihilism in crypto is over — It’s time to dream big again
