Investment giant Fidelity–with some $6.4 trillion assets under management as of June 2025–has disclosed an 8% stake in Texas-based bitcoin miner Riot Platforms (Nasdaq: RIOT), according to SEC filings.

Fidelity held shares in Riot prior to the filing date of September 29th in quantities under the 5% report threshold, per earlier SEC filings.

Riot recently announced a Q3 revenue record of $180.2 million, producing 1,406 BTC over the quarter. It also kicked off its development of 112 megawatts (MW) for AI/HPC loads at its Corsicana facility. Riot reported $180.2 million in revenue for Q3 2025, up more than double from $84.8 million during the same period in 2024.

Riot operates one of the largest bitcoin mining fleets in the U.S. at 36.6 EH/s and mined 437 BTC last month.

As of time of publication, Riot is down 2.9% to $18.72.