Most shorted S&P 500 stocks in December Posted on January 16, 2025 by wpadmin Gunter_Nezhoda Enphase Energy (ENPH) took the top spot for the most shorted S&P 500 (SP500) stock as a percentage of float in December. As of Dec. 31, 15.51% of Enphase Energy’s (ENPH) shares were sold short, compared to 14.76% at the end