CleanSpark reports September bitcoin production of 629 coins

CleanSpark Inc. (NASDAQ: CLSK) produced 629 bitcoins in September 2025, representing a 27% year-over-year increase in monthly production, according to the company's unaudited mining operations update released Thursday.

The Las Vegas-based bitcoin mining company reported average daily bitcoin production of 20.95 coins, with a peak single-day production of 21.71 bitcoins. For calendar year 2025, CleanSpark has produced 5,925 bitcoins.

The company's bitcoin treasury grew to 13,011 coins as of September 30, 2025, with 2,583 bitcoins posted as collateral or receivables. During September, CleanSpark sold 444.95 bitcoins for total proceeds of $48.8 million, averaging $109,568 per bitcoin.

CleanSpark's operational hashrate reached 50.0 EH/s, with an average operating hashrate of 45.6 EH/s during September. The company deployed 241,934 mining units with peak fleet efficiency of 16.07 J/Th, representing a 26% year-over-year improvement in fleet efficiency.

The company expanded its bitcoin-backed credit line capacity by $200 million in September and made key executive appointments including Matt Schultz as CEO and Chairman, and Gary A. Vecchiarelli as CFO and President.

CleanSpark operates 1.03 gigawatts of contracted power capacity and utilized 808 megawatts to support its mining operations. The company reached the 30 EH/s milestone in October 2024 and 50 EH/s in June 2025.

During fiscal year 2025, CleanSpark completed a $650 million convertible note offering with 0% interest rate and executed a $145 million share buyback program. The company also acquired GRIID Infrastructure, adding mining sites and a development pipeline in Tennessee.

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