CleanSpark has increased its bitcoin stack to 13,011 BTC, worth $1.6 billion, according to its latest monthly production update — equating to a net addition of 184 BTC ($22 million) in September.
The firm mined a total of 629 BTC ($75 million) in September at a 50 H/s operational hashrate, down 4.3% from its 657 BTC haul in August, and sold 444.95 BTC during the month. As a result, the firm remains among the top 10 public bitcoin holders, according to Bitcoin Treasuries data, currently ranked ninth between Trump Media and Coinbase. However, 2,583 BTC of this total was posted as collateral or as a receivable, CleanSpark noted.
There are now 184 public companies that have adopted some form of bitcoin acquisition model. Strategy, MARA, Tether-backed Twenty One, Metaplanet, Adam Back and Cantor Fitzgerald-backed Bitcoin Standard Treasury Company, Bullish, and Riot Platforms make up the remainder of the top 10, with 640,031 BTC, 52,477 BTC, 43,514 BTC, 30,823 BTC, 30,021 BTC, 24,300 BTC, and 19,309 BTC, respectively.
“September was monumental for CleanSpark as we strengthened our leadership team with key C-suite appointments and expanded our bitcoin-backed credit line by $200 million in capacity,” CleanSpark CEO Matt Schultz said in a statement. “Looking ahead, the coming months and fiscal year represent the beginning of an exciting new chapter in CleanSpark’s growth story as we unlock additional value from our energy portfolio and pipeline to drive long-term shareholder returns.”
Riot trims bitcoin holdings amid September production drop
In contrast, Riot Platforms disclosed Friday it reduced its total bitcoin holdings by 22 BTC ($2.7 million) to 19,287 BTC ($2.3 billion) in September after a 6.7% drop in monthly production to 445 BTC at a 36.5 EH/s deployed hashrate.
Despite the slight drop, Riot’s total holdings still place it seventh among public bitcoin holders, per Bitcoin Treasuries.
Riot and CleanSpark shares are up 39% and 62%, respectively, over the past month amid a strong rebound across the public bitcoin mining sector, according to The Block’s price pages. IREN currently leads the niche with a market cap of around $12.8 billion, with Riot second on $7 billion, and MARA third, valued at $6.9 billion. CleanSpark sits seventh with a market cap of around $4.5 billion.
Despite a late September correction, bitcoin closed the month up 5.4%. The foremost cryptocurrency is currently trading at $120,942, according to The Block’s BTC price page, up around 10% over the past week to surpass the $120,000 for the first time since Aug. 14’s all-time high of nearly $125,000.
MARA and Cango also released their September production updates earlier on Friday, The Block previously reported.
© 2025 The Block. All Rights Reserved. This article is provided for informational purposes only. It is not offered or intended to be used as legal, tax, investment, financial, or other advice.
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