In May, MARA mined 950 BTC and chose to hold all of it, bringing its total holdings to 49,179 BTC. Riot Platforms mined 514 BTC and sold nearly all of it, generating approximately $51.3 million in revenue.

https://www.coindesk.com/markets/2025/06/03/riot-platforms-boosts-bitcoin-output-to-514-btc-as-hashrate-and-expansion-plans-ramp-higher

https://ir.mara.com/news-events/press-releases/detail/1396/mara-announces-bitcoin-production-and-mining-operation-updates-for-may-2025