Apollo Global Management Inc. and Workday Inc. have been added to the S&P 500 index, replacing Qorvo Inc. and Amentum Holdings Inc. Following the announcement, Apollo Global's shares surged by as much as 7.4% in premarket trading, while Workday's stock rose nearly 10%. The inclusion in the S&P 500 has driven significant market activity, with investors reacting positively to the news.