Bitcoin mining pools
Who assembles Bitcoin's blocks. Pool shares by the number of blocks mined.
Data as of 23 Oct 2026
The three largest pools mined 63.1% of blocks over the last 30 days. A pool is not a miner: the power belongs to hundreds of companies and farms that can switch elsewhere at any time, so a higher pool share is not a problem in itself.
Last 7 days
- 1. Foundry USA26.9%
- 2. AntPool19.7%
- 3. F2Pool16.1%
- 4. ViaBTC8.6%
- 5. SpiderPool6.5%
- 6. MARA Pool5.4%
- 7. SECPOOL4.7%
- 8. Luxor4.1%
Last 30 days
- 1. Foundry USA25.8%
- 2. AntPool20.9%
- 3. F2Pool16.3%
- 4. ViaBTC9.3%
- 5. SpiderPool6.6%
- 6. MARA Pool5.1%
- 7. SECPOOL4.3%
- 8. Luxor3.7%
Last 3 months
- 1. Foundry USA25.4%
- 2. AntPool19.5%
- 3. F2Pool15.8%
- 4. ViaBTC8.6%
- 5. SpiderPool8.1%
- 6. MARA Pool5.0%
- 7. SECPOOL4.3%
- 8. Luxor3.5%
Frequently asked questions
What is a mining pool?
A group of miners who combine their power and share the reward in proportion to their contribution. The pool does not mine bitcoin itself, it only assembles blocks. A miner in a pool can switch elsewhere at any time.
Is it a threat that a big pool has over a third of the power?
A pool does not hold the miners' money, only their power. In an attack miners would leave the pool. Still, it is better when power is spread out. A share above 50% would be a serious problem.
What is an "empty block"?
A pool mined a block without transactions, usually shortly after the previous block, before it could fetch fresh transactions. They are very rare for large pools today.
Sources: mempool.space. For information only, not investment advice.