https://t.co/5xedp848e4
CleanSpark
Public Bitcoin miner operating 50 EH/s across self-managed data centers
4.2/ 5
Our score
Very good
Type
Public miner
Hashrate
50 EH/s
Coins
BTC
Stock ticker
CLSK
What is CleanSpark?
CleanSpark is an American digital infrastructure and industrial Bitcoin mining company operating wholly owned data center facilities across the United States. As of September 2026, the company manages 50 EH/s in operational mining hashrate and holds 1.8 GW of contracted power across its operational footprint.
Corporate background and leadership
Founded in 2014 and based in Henderson, Nevada, CleanSpark originally developed microgrid energy software before entering industrial Bitcoin mining in December 2020. The executive team is led by Zachary Bradford, serving as Chief Executive Officer and President, alongside S. Matthew Schultz, who serves as Executive Chairman. In September 2026, its subsidiary CSDC Finance I, LLC closed a $2.28B offering of 7.875% senior secured notes due in 2031 to fund expanded data center construction.
Mining operations and power infrastructure
CleanSpark develops and manages proprietary data center infrastructure rather than outsourcing hosting. Its operational sites are situated across Georgia, Mississippi, Tennessee, and Wyoming. Mining operations rely exclusively on the Bitcoin network, operating high-efficiency ASIC fleets with an average peak efficiency of 16.07 J/TH. Beyond pure mining, the firm designs and leases capacity for high-performance computing (HPC) and artificial intelligence workloads backed by its contracted electrical supply.
Operational metrics and production record
The company reached 50 EH/s of self-operated hashrate in June 2025. In September 2024, CleanSpark acquired seven mining facilities in Tennessee from Exponential Digital, LLC. Through September 2026, the company held 13,530 BTC in total treasury reserves, having mined 529 BTC in September 2026 and 5,432 BTC across the first nine months of the 2026 calendar year. In October 2026, CleanSpark moved from monthly operational updates to standard quarterly public disclosures.
Risks and operational trade-offs
CleanSpark does not provide retail mining pools, public ASIC hosting contracts, or cloud mining leases. Profitability remains directly tied to Bitcoin network difficulty, quadrennial halving cycles, and spot Bitcoin prices. Industrial operations are exposed to fluctuating wholesale electricity rates, capital debt obligations, and hardware obsolescence.
Founders
Zachary BradfordCEO and President
S. Matthew SchultzExecutive Chairman
Best for:Public equity investors seeking Bitcoin mining exposureInstitutional research on industrial Bitcoin data centersEnterprise clients seeking HPC data center infrastructure
Pros and cons
Pros
- Operates 50 EH/s of dedicated mining hashrate
- Fleet operates at an efficient peak of 16.07 J/TH
- Holds 1.8 GW of power under contract across four states
- Maintains 13,530 BTC in corporate treasury reserves
- Wholly owns and manages its operational data centers
Cons
- Offers no retail hosting services, pool mining, or cloud mining contracts
- Operations remain concentrated in the United States
- Revenues remain exposed to Bitcoin network difficulty and halving cycles
- Carries $2.28B in senior secured debt maturing in 2031
Our review
4.2/5
Very good
CleanSpark operates a high-efficiency 50 EH/s proprietary Bitcoin mining fleet, though it offers no public mining pool or retail hosting services for individual miners.
CleanSpark is a publicly traded American Bitcoin miner and digital infrastructure operator founded in 2014 and headquartered in Henderson, Nevada. Led by CEO Zachary Bradford and Executive Chairman S. Matthew Schultz, the firm entered Bitcoin mining in December 2020. Since then, it has shifted from third-party hosting to fully self-operated industrial data centers across Georgia, Mississippi, Tennessee, and Wyoming.
As of September 2026, the company reported 50 EH/s in operational hashrate, supported by 1.8 GW of power under contract. Its fleet operates at a peak efficiency of 16.07 J/TH, which keeps direct operational power costs relatively low during network difficulty spikes and post-halving margin pressure. In September 2026, CleanSpark produced 529 Bitcoin, bringing calendar year-to-date output to 5,432 BTC and total treasury holdings to 13,530 BTC.
The company maintains a strong balance sheet backed by institutional capital, including a $2.276 billion senior secured notes offering closed in September 2026 to finance further site build-outs. However, several operational constraints exist:
- CleanSpark is a proprietary enterprise miner and does not operate a public mining pool, retail hosting services, or cloud-mining contracts.
- Capital allocation carries exposure to rising industrial power contract rates, debt servicing on its multi-billion dollar notes, and ongoing hardware obsolescence.
- Geographic operations are concentrated exclusively in North America, exposing energy access to regional power grid constraints.
CleanSpark suits public market equity investors seeking exposure to industrial Bitcoin production and high-efficiency computing infrastructure. Retail miners seeking pool payout structures or retail colocation must turn to specialized third-party providers instead.
Sources (1)
Specs
| Type | Public miner · unverified |
|---|---|
| Coins | BTC · unverified |
| Hashrate | 50 EH/s · unverified |
| Stock ticker | CLSK · unverified |
| Locations | Georgia, Mississippi, Tennessee, Wyoming · unverified |
Not disclosed by the provider: Pool fee, Payout schemes, Minimum payout, Energy sources, Hardware models.
Data from the provider's website and public sources. Fees and availability change; confirm on the official site before you sign up.
Key features
Industrial proprietary mining
CleanSpark operates 50 EH/s of self-managed operational hashrate dedicated strictly to mining Bitcoin.
Contracted energy capacity
The company maintains 1.8 GW of power under contract across regional energy utilities.
High-efficiency ASIC fleet
Mining rigs operate at a peak deployed fleet efficiency of 16.07 J/TH.
Treasury accumulation
CleanSpark held 13,530 BTC in treasury reserves as of September 2026.
High-performance computing hosting
The company develops and leases data center infrastructure for enterprise HPC and AI compute workloads.
Inside CleanSpark
Industrial Bitcoin Mining
Proprietary, fully self-operated bitcoin mining infrastructure and data center operations deploying enterprise ASIC hardware.
HPC and AI Data Center Infrastructure
High-performance computing and data center leasing services powered by contracted energy infrastructure across regional sites.
CleanSpark screenshots
User reviews
No user reviews yet. Have you used CleanSpark? Share your experience below.
FAQ
Who founded CleanSpark and who leads it?
CleanSpark was founded in 2014 and is led by CEO and President Zachary Bradford alongside Executive Chairman S. Matthew Schultz.
What is CleanSpark's operational hashrate?
CleanSpark reported an operational hashrate of 50 EH/s as of September 2026, with 1.8 GW of power under contract.
Does CleanSpark offer a public mining pool or retail hosting?
No, CleanSpark exclusively operates proprietary, company-owned Bitcoin mining infrastructure and does not offer public pool fees or retail colocation.
How much Bitcoin does CleanSpark hold?
As of September 30, 2026, CleanSpark held 13,530 Bitcoin in its corporate treasury after producing 5,432 BTC in the first nine months of the calendar year.
Where are CleanSpark's data centers located?
CleanSpark operates data center infrastructure in the United States, with facility footprints across Georgia, Mississippi, Tennessee, and Wyoming.
Latest from CleanSpark on X
CleanSpark is headed to @imagineif_bna in Nashville next week. The summit explores the convergence of Bitcoin, AI, energy and freedom tech, and how these technologies shape what's next.
Catch our speakers @smatthewschultz, @harry_sudock and @sprainhill on stage as they share their perspectives on the future. See you there!
Catch our speakers @smatthewschultz, @harry_sudock and @sprainhill on stage as they share their perspectives on the future. See you there!
https://t.co/p8PmgFtpAW
https://t.co/p7eLutb4sL
https://t.co/Wg1NlJL7RZ
Recent public posts from @cleanspark_inc, shown as published. Not reviewed or endorsed by CryptoReview.
Alternatives to CleanSpark
Institutional digital asset mining infrastructure operating the largest Bitcoin mining pool
Mining pool · Firmware & softwareBTC · ZEC0%
Bitcoin mining pool, LuxOS firmware, and compute derivatives with over 40 EH/s in hashrate
Mining pool · Firmware & softwareFPPS · Fixed +1>40 EH/s
Publicly traded clean-energy Bitcoin miner and HPC provider operating 440 MW of data center capacity
Public miner · HostingBTC25.1 EH/s
Publicly traded digital infrastructure enterprise and Bitcoin miner with 1.9 GW of energized power capacity
Public miner · Mining pool +1BTCNASDAQ: MARA
ADX-listed digital infrastructure operator running over 550 MW of power across six markets
Public miner · HostingBTC15.9 EH/s
Proof-of-work mining pool founded in 2013 supporting Bitcoin and over 40 networks
Mining poolBTC · BCH +91% - 4%