Top 5 Trending Stocks by Unusual Trading Volume, 1/9/26

Unusual trading volume signals that a stock is moving well above or below its average activity, often driven by major news, upcoming catalysts, or strong institutional interest. Traders look at stocks with unusual volume in anticipation of notable price movements in the days ahead, driven by changes in market sentiment, and to take advantage of attractive buying/selling opportunities.

Here are the top five stocks with unusual volumes on January 8, 2026:

1. Regencell Bioscience (RGC) – This early-stage bioscience company focuses on the research, development, and commercialization of traditional Chinese medicine for the treatment of neurocognitive disorders and degeneration, specifically Attention Deficit Hyperactivity Disorder (ADHD) and Autism Spectrum Disorder. On Thursday, RGC stock plunged about 22% after rallying the previous day. Notably, 3.38 million RGC shares were traded, compared to the average volume of 302.68K. There was no specific news on the company. Interestingly, RGC stock has rallied by more than 32,514% over the past year, driven by a 38-for-1 stock split and meme-stock frenzy. 
2. Companhia Paranaense de Energia Sponsored ADR (ELPC) – This Brazilian utility company is engaged in the generation, transformation, distribution, and sale of electricity. On Thursday, 183.08K ELPC shares were traded, compared to the average volume of 27.56K. The company recently disclosed that asset manager GQG Partners LLC reduced its stake and now holds 70,577,424 ELPC common shares, equivalent to about 2.37% of the total share capital.  
3. Acuity Brands (AYI) – The company offers lighting, lighting controls, building management solutions, and an audio, video, and control platform. On Thursday, AYI stock fell about 13%. Notably, 1.29 million shares were traded, way above the average volume of 249.25K. AYI stock declined even as the company reported better-than-expected Q2 FY26 earnings and in-line revenue.  
4. Compass (COMP) – It is a leading tech-powered real estate services company. On Thursday, 76.91 million shares were traded, compared to the average volume of 12.85 million, with the stock rising 3.55%. The rise in COMP stock continued from the previous day, after shareholders approved the merger between Compass and Anywhere Real Estate (HOUS). The merger is expected to close on January 9, 2026.  
5. Revolution Medicines (RVMD) – It is a late-stage clinical oncology company focused on developing novel targeted therapies for patients with RAS-addicted cancers. On Thursday, 13.61 million RVMD shares were traded, compared to the average volume of 2.52 million. RVMD stock was up about 5% in Thursday’s regular trading session and 15.5% in the extended trading session as investors reacted to reports of the potential acquisition of the biotech company by Merck (MRK).