Bitcoin miner CleanSpark produced 529 BTC in September, a decline of nearly 11% from the 593 BTC mined in August, according to its September 2026 operational update. Rival BitFuFu also reported lower production for the month, while Canaan held steady at 44 BTC, as the three publicly traded miners disclosed distinct changes to their operations.

CleanSpark Reduces Production and Ends Monthly Updates

CleanSpark finished September holding 13,530 BTC, down from 13,703 at the end of August. During the month, the company sold two BTC on spot markets and another 700 BTC through exercised call options, recording an average sale price of $72,928 per coin when option premiums are included. Its average daily production reached 17.64 BTC.

On the operational side, CleanSpark reported computing power of 50 exahashes per second (a unit equal to one quintillion hashing calculations per second) and nearly 200,000 deployed mining machines. The company said it will now report results quarterly rather than releasing monthly mining updates, meaning the detailed production, sales, and holdings figures in reports like this one will reach investors on a less frequent schedule.

Data Center Investment Remains a Priority

CleanSpark closed a $2.276 billion secured bond offering to fund construction at its Sandersville, Georgia data center site, where a lease is expected to generate approximately $6.6 billion during its initial term. The company said the bond financing covers Sandersville through completion, while its mining business continues to operate.

A separate report examined potential difficulties for miners stemming from AI chip supplies, a shortage the New York Fed's Williams said could last over two years. On October 13, Bitcoin Magazine shared an X discussion on Bitcoin mining and artificial intelligence computing.

BitFuFu Faces an Ethiopian Power Dispute

BitFuFu produced 167 BTC in September, versus 174 BTC in August. Its own mining output increased from 88 BTC to 98 BTC, but customer cloud mining — output credited to clients who purchase hashrate — fell from 86 BTC to 69 BTC, more than offsetting that in-house gain; total managed computing power dropped to 19.4 exahashes per second.

The company's proposed Ethiopian mining acquisition remains unfinished because of a dispute involving the site's electricity supplier, leaving the approximately 13,700 machines BitFuFu has already deployed there tied to the unresolved deal, for which it has paid $4.1 million. Separately, Binance announced plans to close its cloud mining service in November as the exchange expands into US stocks.

Canaan Maintains Output and Expands Heat Recovery

Canaan ended September with 1,875 BTC in holdings, up from 1,868 at August's close. Its non-joint-venture computing capacity remained at 10 exahashes per second, while joint ventures operated at 4.18 exahashes per second, and September production matched the previous month's total.

Thursday's trading followed a wider fall in Bitcoin mining shares, after hot inflation data had triggered Wednesday's stock market selloff — the worst since July — in which several rival miners dropped more than 12%. CleanSpark traded at $8.76, BitFuFu at $1.27, and Canaan at $0.25.

Canaan also said its eight-megawatt Nordic heating facility now supplies recovered mining heat to approximately 2,800 homes, an approach that turns the waste heat of computing into a resource for local heating. The company is preparing a similar heat-recovery project for Canadian greenhouses, pending final site inspections.