S&P Dow Jones Indices announced late Friday changes to various S&P indices, coinciding with the quarterly rebalance. Notable among the additions to the prestigious S&P 500 Index was cybersecurity company CrowdStrike Holdings, Inc. (NASDAQ:CRWD). What Happened: CrowdStrike will replace Robert Half Inc. (NYSE:RHI) in the S&P 500 Index, whileinvestment management company KKR & Co Inc. (NYSE:KKR) and GoDaddy Inc. (NYSE: GDDY) will take the place of Comerica Inc. (NYSE:CMA) and Illumina Inc. (NASD:ILMN), respectively in the broader gauge. The changes will take effect, prior to the open of trading o…