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Some of the largest U.S.-based Bitcoin miners—CleanSpark, MARA, and Riot Platforms—have released their May 2025 operational updates, reporting significant growth in Bitcoin production, infrastructure expansion, and strategic positioning for the post-halving market. These updates reflect the ongoing evolution of the Bitcoin mining industry as companies strive to enhance efficiency and scale operations.

CleanSpark: Strong Growth in Bitcoin Production and Infrastructure

CleanSpark reported producing 694 BTC in May 2025, marking a 7.5% increase from the previous month. The company’s hashrate has reached an impressive 45.6 EH/s, and its Bitcoin treasury has doubled compared to last year, now holding 12,502 BTC. Notably, all reserves were mined directly, showcasing the company’s operational efficiency.

The company has also expanded its contracted power capacity to 987 megawatts and is on track to become the first public miner to achieve a hashrate of 50 EH/s with fully self-operated infrastructure. CEO Zach Bradford highlighted that CleanSpark’s infrastructure-first approach is designed to support scaling beyond 60 EH/s, ensuring full operational control.

MARA: Record-Breaking Bitcoin Production

MARA reported its strongest performance since the April 2024 Bitcoin halving, producing 950 BTC in May—a 35% increase from April. The company also earned 282 blocks, representing a 38% month-over-month growth. This significant production boost can be attributed to operational efficiencies and above-average block reward outcomes achieved by its self-operated MARA Pool.

MARA now holds over 49,000 BTC, further solidifying its position as a top player in the Bitcoin mining sector. CEO Fred Thiel emphasized the importance of the company’s vertically integrated model, which has been instrumental in reducing costs and optimizing energy usage.

Riot Platforms: Expanding Beyond Mining

Riot Platforms mined 514 BTC in May, reflecting an 11% growth compared to the previous month. Beyond mining, the company is heavily investing in its data center business, signaling a strategic pivot to diversify its revenue streams.

Riot recently acquired 355 acres near its Corsicana site in Texas to develop high-performance computing data centers tailored for enterprise and hyperscale clients. To spearhead this initiative, Riot appointed Jonathan Gibbs, an industry veteran, as Chief Data Center Officer. This move underscores Riot’s commitment to expanding its capabilities and driving innovation in the data center space.

Strategic Adaptation in the Post-Halving Market

Together, CleanSpark, MARA, and Riot Platforms are demonstrating resilience and adaptability in the evolving Bitcoin market. Their focus on infrastructure expansion, vertical integration, and strategic treasury management positions them well to navigate the challenges and opportunities of the post-halving environment.

For investors and enthusiasts, these developments highlight the potential of Bitcoin mining companies to innovate and grow amidst changing market dynamics. As the industry continues to mature, keeping an eye on these key players will provide valuable insights into the future of cryptocurrency mining.

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