According to HODL15 Capital, among the listed bitcoin mining companies, Marathon Digital holds 20,818 BTC, ranking first in terms of holdings. It is followed by Riot Platforms with 9,334 BTC; Hut 8 holds 9,109 BTC, ranking third. Other mining companies' holdings are as follows: Cleanspark holds 7,082 BTC. Hive Digital holds 2496 BTC. Cifer Mining holds 2,270 BTC. Canaan holds 1,057 BTC. Bit Digital holds 1038 BTC. Bitfarms holds 1,016 BTC.