Billionaire Stanley Druckenmiller of Duquesne Family Office outperformed the S&P 500 (^GSPC -1.54%) by 50 percentage points during the last three years. He purchased 239,980 shares of Broadcom (AVGO -2.18%) during the third quarter, and it now ranks among his top 15 holdings.Billionaire Steven Cohen of Point72 Asset Management outperformed the S&P 500 by 30 percentage points during the last three years. He bought 211,823 shares of Arista Networks (ANET -1.01%) in the third quarter, and it now ranks among hi ...