Core Scientific started the year as the biggest public miner by hashrate. After expanding their hashrate by 35% in the year's first four months, they can still boast the most hashrate of any public miner by a wide margin.
Even though Core is still the largest miner by hashrate, the fastest-grower is Riot, growing its hashrate by 52% so far in 2022, claiming the title as the second-largest miner by hashrate from Marathon.