Bitcoin Mining Leaderboard Shakes up Ahead of Q3 Earnings
Mid-tier miners close the gap on industry leaders, driving a 117% jump in public hashrate year over year
As public miners gear up to report third-quarter results, the latest data from September reveals a major reshuffling of Bitcoin’s mining leaderboard. Once dominated by a few clear front-runners, the rankings now show a new wave of tier-2 operators closing in fast after a year of aggressive expansion.
Cipher Mining, Bitdeer, and HIVE Digital have all surged into the upper ranks of realized hashrate, narrowing the gap with long-established leaders like MARA, CleanSpark and Bitmain’s proxy Cango. Their ascent highlights how the middle tier of public miners—once trailing far behind—has rapidly scaled production since the 2024 halving.
Collectively, the top public miners reached 326 EH/s of realized hashrate in September 2025, up from 150 EH/s a year earlier. That represents about 31.6% of Bitcoin’s network total, compared with 22% last September—evidence of both rapid growth and deeper consolidation among listed miners heading into earnings season.
MARA, CleanSpark (CLSK), and Cango (CANG) held their positions as the three largest public miners with realized hashrates of 53.3 EH/s, 45.6 EH/s, and 44.7 EH/s, respectively. But several mid-tier names in 2024 closed the distance: IREN made it to the tier-1 league with a 167% growth, Cipher Mining (CIFR) jumped 152% to 18.2 EH/s, Bitdeer (BTDR) rose by 267% to 32.7 EH/s after energizing new SEALMINER deployments, and HIVE nearly quadrupled its hashrate from 5.3 EH/s to 19.3 EH/s over the past year, propelled by new hydro-powered sites in Paraguay.
These gains have redrawn the competitive map, displacing some early leaders and signaling that mining scale is becoming increasingly distributed among publicly traded operators.
While MARA and CleanSpark continued their expansion from 2024 levels, Riot (RIOT) grew more modestly—from 21.2 EH/s to 33.1 EH/s—and slipped in ranking amid faster growth elsewhere. Core Scientific (CORZ), once the largest bitcoin mining operation in 2021, saw realized hashrate fall from 16.4 EH/s to 11.4 EH/s as it shifted resources toward AI and HPC hosting partnerships.
The top public miners now control nearly one-third of global hashrate, up almost ten percentage points year-over-year. That shift underscores how capital access, hardware upgrades, and energy diversification have enabled listed miners to expand faster than private peers—even in a post-halving environment marked by lower margins.
As earnings season approaches, these reshuffled rankings set the stage for a closer look at which miners have managed to translate their rapid expansion into stronger financial performance, and which are still racing to catch up on efficiency and profitability.
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