MARA Holdings

Before emerging as one of the industry's largest Bitcoin miners, MARA Holdings operated as a patent-holding company. In 2017, it pivoted to Bitcoin mining through the acquisition of Global Bit Ventures. As of March 2026, MARA Holdings commanded up to 8% of the Bitcoin network's hashrate, making it one of the largest publicly traded miners on the network. 

However, with the rise of artificial intelligence and thinning profitability for Bitcoin miners, MARA has also expanded operations into data center infrastructure across North America, Latin America, the Middle East, and Europe. In March 2026, the company reported that it had sold more than $1 billion in Bitcoin to help fund its expansion into AI. CEO Fred Thiel indicated that the firm would continue selling Bitcoin throughout the year to fund operations.