Interactive Brokers to Replace Walgreens in S&P 500

Interactive Brokers Group shares rose up to 8% in postmarket trading after being added to the S&P 500 Index, replacing Walgreens Boots Alliance. Talen Energy Corp. also gained up to 3.5% after being included in the S&P Midcap 400 Index.

Interactive Brokers Group Inc. shares climbed as much as 8% in postmarket trading on Monday, August 25, following the S&P Dow Jones Indices announcement that the automated electronic broker will join the S&P 500 Index before trading opens on August 28. The addition replaces Walgreens Boots Alliance Inc. (WBA), which was up as much as 0.5% in after-hours trading [1].

Talen Energy Corp. (TLN) gained as much as 3.5% in extended trading on the same day, after being included in the S&P Midcap 400 Index. This move replaces Interactive Brokers Group in the S&P Midcap 400 [2].

The changes are part of a broader update to the S&P 500, S&P MidCap 400, and S&P SmallCap 600 indices. Interactive Brokers Group joins the S&P 500, while Talen Energy takes its place in the S&P MidCap 400. Additionally, Kinetik Holdings Inc. (KNTK) will join the S&P SmallCap 600, replacing Pacific Premier Bancorp Inc. (PPBI) [2].

The S&P Dow Jones Indices announcement stated that the changes will take effect before the opening of trading on the respective effective dates. This move reflects the indices' ongoing efforts to reflect the current market landscape and provide investors with accurate and up-to-date benchmarks [2].

For more information about the S&P Dow Jones Indices, please visit www.spdji.com.

References:

[1] https://www.bloomberg.com/news/articles/2025-08-25/interactive-brokers-to-join-s-p-500
[2] https://www.marketscreener.com/news/interactive-brokers-group-set-to-join-s-p-500-talen-energy-to-join-s-p-midcap-400-and-kinetik-holdi-ce7c50d8dc8bf127