Top-3 most profitable ASIC miners of the first half of 2026: who is in the lead?
Summarizing the first half of 2026, I can confidently highlight a clear leader among ASIC miners for Bitcoin mining. The Bitmain Antminer S21 XP 270 TH/s model not only topped the profitability ranking but did so with an overwhelming advantage, demonstrating a semi-annual yield of 10.01%, equivalent to 20.02% annualized. This is an outstanding result, especially against the backdrop of a volatile market.
The second spot in the ranking was taken by the Bitmain Antminer S21 PRO 234 TH/s MIX. Its indicators are more modest—6.23% for the half-year (12.46% annualized) with a mined amount of 0.018991674 BTC. Closing the top three is the MicroBT Whatsminer M70 222 TH/s with a profitability of 4.70% for the half-year (9.40% annualized) and a mining volume of 0.018017742 BTC.
Key Indicators of Profitability Leaders
| ASIC Miner Model | Mined in Half-Year (BTC) | Semi-Annual Yield | Annual Yield |
| Bitmain Antminer S21 XP 270 TH/s | 0.02191347 | 10.01% | 20.02% |
| Bitmain Antminer S21 PRO 234 TH/s MIX | 0.01899167 | 6.23% | 12.46% |
| MicroBT Whatsminer M70 222 TH/s | 0.01801774 | 4.70% | 9.40% |
Notably, the composition of the top three was not static. In January, April, and May, only representatives of the Bitmain Antminer S21 line dominated. However, in February, March, and June, individual devices from the MicroBT Whatsminer M70 series broke into the top, indicating high competition in the segment. The spread in profitability across the entire tested equipment fleet was enormous—from 0.54% to 10.01% for the half-year.
This report clearly demonstrates that assessing mining profitability solely based on Bitcoin's price dynamics is a strategically flawed approach. Over six months, the BTC price fluctuated in a wide range from $96,942 to $58,573, while network difficulty was recalculated 13 times and decreased by 9.41%. It was this reduction in difficulty, caused by the shutdown of outdated and inefficient devices, that became the key factor supporting the profitability of modern models.
The most profitable month was January, thanks to peak prices and two consecutive difficulty reductions. The toughest was June, when a price correction coincided with a strengthening ruble, significantly reducing the ruble-denominated revenue of Russian miners. Nevertheless, even under such conditions, high-performance models maintained positive momentum.
My expert conclusion: The dominance of the Antminer S21 XP 270 TH/s is not a coincidence but the result of an optimal balance between high computational power and moderate energy consumption. For investors, this is a signal: diversifying the equipment fleet is not a luxury but a necessity. The regular change of leaders over the half-year confirms that betting on a single model is a high risk. A savvy miner should have several types of devices in their arsenal to minimize dependence on market fluctuations and changes in network difficulty.