Bitcoin mining firms reported a notable decline in production for June 2025, largely due to power curtailment measures in Texas and weather-related disruptions, according to company announcements this week.
Riot Platforms: down 12%
Riot Platforms mined 450 Bitcoin in June, down about 12% from 514 BTC in May. CEO Jason Les attributed the drop to the firm’s participation in Texas’ power curtailment programs, which are designed to stabilize the grid during peak summer demand.
Riot sold 397 BTC for $41.7 million during the month and holds 19,273 Bitcoin.
Cipher Mining: impacted by 4CP strategy
Cipher Mining produced 160 Bitcoin in June and sold 58. The company holds 1,063 BTC. Like Riot, Cipher voluntarily curtailed its operations under the Four Coincident Peak (4CP) program to avoid costly electricity charges during peak demand periods.
The company’s new Black Pearl facility in Texas began contributing to production at the end of June but did not offset the reduction from curtailment.
MARA Holdings: down 25%
MARA Holdings reported the steepest drop, with June production falling 25% to 211 BTC compared to 282 in May. CEO Fred Thiel cited weather-related downtime, temporary use of older equipment, and “natural variability in block luck” for the decline. MARA holds 49,940 Bitcoin and did not sell any in June.
CleanSpark: a bright spot
CleanSpark stood out by increasing its production by 6.7% in June, mining 445 Bitcoin and surpassing its mid-year hashrate target of 20 EH/s. The firm sold only 8 BTC during the month and now holds 6,591 BTC.
Why miners curtailed power use
June marks the beginning of ERCOT’s 4CP program, which runs through September and imposes higher charges on large consumers during peak hours. Miners like Riot and Cipher curtailed operations to avoid these costs while contributing to grid stability.
While Riot and Cipher emphasized that their strategies enhanced competitiveness and lowered power costs, the production impact was evident in the June numbers.