Riot Platforms sold 4,300 Bitcoin to secure operating funds and expand its AI data center business, leaving the publicly listed Bitcoin miner with 11,380 BTC at the end of June. BitcoinTreasuries.NET had previously said the sale left Riot ranked 13th among Bitcoin holders. Of the June-end total, 5,821 BTC had been pledged as collateral and were worth about $666 million at then-prevailing prices. Riot mined 1,587 BTC in the second quarter at a cost of $49,912 per Bitcoin excluding depreciation, while revenue from its Bitcoin mining business fell 19.3% from a year earlier to $113.7 million. The move shows how mining companies are using treasury assets and operating cash flow to support a broader push into AI infrastructure.