Arbutus Biopharma (ABUS) said in a regulatory filing Friday that the Board of Appeal of the European Patent Office verbally revoked the company's patent EP 2279254.

Shares of the company slumped 12% as intraday trading volume soared to over 6.74 million from a daily average of about 1.13 million.

Shares of power companies fell after multiple media outlets reported that the Trump administration is pushing for technology firms to shoulder the costs of new power plants in connection with a surge in the construction of artificial intelligence data centers.

Constellation Energy (CEG) shares slumped 11%, with intraday trading volume climbing to 5.18 million from a daily average of about 2.64 million.

Vistra (VST) shares dropped 7.2% as intraday trading volume jumped to over 9 million from a daily average of roughly 4.8 million.

Price: 4.12, Change: -0.58, Percent Change: -12.34