No single mining pool has found more bitcoin blocks than the miners who never identified themselves at all.
Key Takeaways
Unknown miners hold 230,770 bitcoin blocks, 24.03% of all blocks, per Cloverpool data.Antpool ranks second with 109,004 blocks; Foundry USA leads current hashrate despite fewer historic blocks.Poolin filed Chapter 11 bankruptcy in New Jersey in July 2026 after ceasing Texas operations.That figure places the unknown category ahead of every named pool operating today, including industry leaders Antpool and F2pool. The unknown label, however, does not point to a single company or person. It covers two distinct groups of miners.
Two Kinds of Unknown MinersViaBTC, founded by former Tencent engineer Haipo Yang in 2016, has mined 52,116 blocks, 5.43% of the total. Braiins Pool, formerly known as Slushpool, the world’s oldest continuously operating public pool, dates to November 2010 under founder Marek Palatinus and has produced 41,969 blocks, 4.37% of all blocks found.
Cloverpool itself, the rebranded form of BTC.com since September 2024, has mined 41,451 blocks, 2.35% of the total. Binance Pool, launched in April 2020, holds 22,005 blocks, 2.29%. Bitfury, better known today for its shift toward AI and high-performance computing, holds 19,513 blocks, 2.03%.
Why the Numbers MatterThe concentration of blocks in the unknown category is a reminder that Bitcoin’s earliest history remains only partly documented. Coinbase message attribution depends entirely on miners choosing to identify themselves, and no protocol rule requires it. For researchers studying wealth concentration, dormant wallet activity, and the scale of Nakamoto’s own holdings, the unknown block count is the closest available proxy for that unresolved history.
