Bitcoin Mining Pool Concentration in 2026: Who Is Mining the Most Blocks?

Bitcoin Mining Pool Concentration in 2026: Who Is Mining the Most Blocks?

Bitcoin mining remains a competitive global industry, but block production is not evenly distributed among miners and mining pools. The weekly distribution analyzed here shows a strong concentration in a small number of reported categories, led by the “Unknown” category, AntPool, F2Pool, and ViaBTC.

According to Minector’s internal data, the dataset contains 1,009 Bitcoin blocks. The figures describe blocks attributed during the measured week, rather than a permanent ranking of mining power. Because Bitcoin mining is probabilistic, a pool’s share of blocks over a short period can differ from its underlying share of network hashrate.

Weekly Bitcoin Block Distribution

The table below presents every category in the supplied dataset. The percentages are the reported shares of the 1,009 blocks and are shown without changing the underlying figures.

Who Mined the Most Bitcoin Blocks?

Unknown is the largest reported category

The largest category is Unknown, with 520 blocks and a reported share of 51.5362%. This is not the same as saying that one identifiable mining pool controlled 51.5362% of Bitcoin’s mining power. “Unknown” generally indicates that the available attribution data did not associate those blocks with a named pool or recognizable coinbase signature.

That distinction is important when interpreting concentration. The Unknown category may represent multiple miners, private operations, unidentified pool infrastructure, or blocks whose attribution was incomplete. It should therefore be treated as an attribution category rather than automatically as a single mining entity.

AntPool leads among named pools

AntPool is the largest specifically named pool in the dataset, producing 224 blocks, or 22.2002% of the total. Its result places it well ahead of the other identified pools, although one week of block production should not be used alone to establish a long-term hashrate ranking.

F2Pool follows with 150 blocks and a 14.8662% share. ViaBTC produced 93 blocks, equal to 9.2170%. Together, AntPool, F2Pool, and ViaBTC accounted for 467 blocks, or 46.2834% of the weekly total, based on the supplied figures.

Smaller pools account for a limited share

Braiins Pool mined 11 blocks, representing 1.0902%, while BTC.com mined 9 blocks, representing 0.8920%. Poolin and Ultimus each recorded 1 block and 0.0991%.

These smaller results show that block discovery is concentrated among the largest reported categories during this period. However, a small block count does not necessarily mean that a pool has no meaningful role in the wider mining market. Short-term luck, changes in connected hashrate, and pool participation can all affect the number of blocks found.

What Mining Pool Concentration Means

Mining pools coordinate many independent miners. Participants usually direct their machines to a pool, which distributes work and pays rewards according to the pool’s payout method and the miner’s contributed hashrate. The pool’s software and infrastructure typically construct candidate blocks and communicate work to participating devices.

This arrangement improves income predictability for individual miners because rewards are shared over time rather than relying on one miner finding a complete block independently. At the same time, it can make the pool operator an important coordination point for transaction selection, block templates, and communication with miners.

Mining pool concentration is therefore different from direct ownership concentration. A pool may represent thousands of independent mining businesses and individuals. If those miners can switch to another pool, the operator’s practical control may be less durable than the block statistics initially suggest.

Why Concentration Matters for Bitcoin

A concentrated mining ecosystem can create operational and governance risks. Large pools may have greater influence over transaction selection, fee policies, software defaults, and the timing of responses to network events. Even without malicious behavior, outages or configuration errors at a major pool could temporarily affect a significant amount of mining activity.

Concentration can also reduce diversity in the systems used to build and relay blocks. A broader distribution of pool operators, mining locations, infrastructure providers, and mining software can make the network more resilient to technical failures and coordinated pressure.

The theoretical 51% attack

The best-known mining centralization risk is the theoretical 51% attack. If a single entity, or a coordinated group, controlled more than half of the network’s active mining hashrate, it could potentially reorganize recent blocks, reverse its own transactions, or prevent selected transactions from being confirmed for a period of time.

Such control would not allow the attacker to create unlimited bitcoin, spend coins belonging to other users without their keys, or change the protocol instantly. The attack would also be expensive, visible, and difficult to sustain if miners could leave the controlling pool or if the wider ecosystem responded.

The supplied data does not establish that any named pool or identifiable entity controlled a majority of Bitcoin’s hashrate. In particular, the 51.5362% Unknown category should not be interpreted as proof of a single operator holding majority control. It indicates that more than half of the blocks were not attributed to a named pool in this dataset.

How to Interpret One Week of Data

Block discovery is random. A pool with a particular hashrate share can find more or fewer blocks than expected during any individual week because each block is the result of a probabilistic mining process.

For a more reliable view, analysts should compare longer periods and examine several measures at the same time. These include reported block share, estimated hashrate, pool membership, geographic distribution, mining software, and whether miners can redirect their machines quickly.

• Block attribution: Check whether unidentified blocks are grouped into an Unknown category or distributed among named pools.
• Time horizon: Use longer observation periods to reduce the effect of short-term mining luck.
• Pool versus miner control: Consider whether participating miners can change pools independently.
• Infrastructure diversity: Assess whether mining depends on a narrow set of operators, regions, or service providers.

The most useful conclusion from this weekly snapshot is that identifiable block production is led by a few major pools, while the largest individual category is unattributed. That combination deserves monitoring, but it is not by itself evidence of an active attack or a permanent failure of Bitcoin’s decentralized design.

Conclusion

The supplied weekly data shows a highly concentrated distribution of reported Bitcoin blocks. Unknown recorded 520 blocks and 51.5362%, followed by AntPool with 224 blocks and 22.2002%, F2Pool with 150 blocks and 14.8662%, and ViaBTC with 93 blocks and 9.2170%.

AntPool is the largest named pool in this snapshot, but the Unknown category makes attribution the central issue. Mining pool concentration can create resilience and governance concerns, including the theoretical possibility of a 51% attack, yet the figures do not prove that a single entity controlled most of the network. Longer-term data, transparent attribution, and the ability of miners to switch pools remain essential when evaluating Bitcoin’s actual decentralization.

Frequently Asked Questions

Does the Unknown category mean one pool mined 51.5362% of the blocks?

No. Unknown is an attribution category covering 520 blocks, or 51.5362%, in the supplied data. It does not identify one operator and should not automatically be treated as evidence that a single pool controlled that share of Bitcoin’s hashrate.

Which named mining pool mined the most blocks?

AntPool mined the most among the named pools, with 224 blocks and a reported share of 22.2002%. F2Pool ranked next with 150 blocks and 14.8662%, followed by ViaBTC with 93 blocks and 9.2170%.

Does a pool with more than 50% of the blocks automatically have a 51% attack?

No. A block share over 50% during one period does not automatically demonstrate majority hashrate control, particularly when the result belongs to an Unknown category. A 51% attack concerns effective control of mining power and the ability to sustain that control, not simply one short-term block-attribution result.

Why can block share differ from actual hashrate share?

Mining is probabilistic, so pools can find more or fewer blocks than their expected share during a given period. Block attribution may also be incomplete, and miners can move between pools. For these reasons, block statistics should be reviewed across longer periods and alongside independent hashrate and infrastructure data.