Three Pools Account for Nearly 30% of Bitcoin Blocks
Antpool, F2pool and Foundry USA have mined about 29.13% of Bitcoin’s blocks since each began, while an “unknown” category holds 24.03%, Cloverpool data show.
On-chain statistics compiled by Cloverpool show Antpool, F2pool and Foundry USA have together mined about 29.13% of Bitcoin’s historical blocks. Antpool accounts for 109,004 blocks (11.35%), F2pool 98,148 blocks (10.22%) and Foundry USA 72,569 blocks (7.56%).
Cloverpool attributes blocks by reading miners’ coinbase messages. Its records show an “unknown” category with 230,770 blocks, or 24.03% of all blocks. That category covers solo miners and small operators that did not insert identifying tags and early blocks produced before pooled mining, including blocks mined by Bitcoin’s creator in 2009–2010.
Antpool launched in 2013–2014 to serve users of Bitmain’s Antminer hardware and was established as a standalone overseas operator in 2021. F2pool was founded in May 2013. Foundry USA started in late 2020 and expanded after China’s 2021 mining restrictions; it now frequently leads live hashrate measurements despite having fewer all-time blocks than some older pools.
Other historical shares include ViaBTC with 52,116 blocks (5.43%), Braiins Pool (formerly Slushpool) with 41,969 blocks (4.37%), BTC Guild with 32,935 blocks (3.43%), Ghash.IO with 23,083 blocks (2.40%) and Poolin with 28,039 blocks (2.92%). Ghash.IO briefly exceeded 50% of network hashrate in June 2014 and wound down mining operations in October 2016.
Poolin’s wallet arm suspended withdrawals in September 2022 and issued IOUs to about 11,700 customers, with claims around $163.7 million. Poolin Technology and its U.S. affiliates filed for Chapter 11 in New Jersey in July 2026 after ceasing operations at West Texas sites; the filing centered on a $52 million stalking-horse bid for those properties.
Cloverpool’s own tally shows it has mined 41,451 blocks (2.35%). Binance Pool holds 22,005 blocks (2.29%) and Bitfury 19,513 blocks (2.03%).
Historical block totals do not match current mining power. Older pools accumulated blocks over longer periods, while later entrants can concentrate recent mining capacity. Block attribution depends on whether miners include identifying text in coinbase messages, leaving a portion of early activity untagged in public records.
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