Shares of Riot Platforms (NASDAQ: RIOT) jumped on September 24, opening at $17.82 and rising above $19 before 10:00 AM EST. That lifted Riot’s market cap to about $7.04 billion, nudging ahead of MARA’s $6.8 billion valuation to become the second most valued public bitcoin miner.

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Riot Platforms produced 484 BTC in July 2025, an 8% increase from June’s 450 BTC, before mining 477 BTC in August, a 2% month-over-month decline, according to the company’s monthly updates.

Alongside its mining growth, Riot has advanced into high-performance computing. In July, the company hired Jonathan Gibbs as Chief Data Center Officer to spearhead scalable data-center development, and Riot reported a return to profitability in its Q2 2025 earnings. 

Read More: Riot mines 477 Bitcoin in August, down 2% from previous month

At time of publication, RIOT is up 13.7% from yesterday’s close.