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Every S&P Index change, with the price reaction
One page for each announcement: who joined, who left, and what the share prices did in the minutes and hours after the news.
Effective
November 12, 2025 at 4:00:00 PM
S&P index changes, November 2025: Sterling Infrastructure
On 6 November 2025, S&P Dow Jones Indices announced 4 index changes affecting 3 companies in the S&P MidCap 400 and S&P SmallCap 600. The most notable move was Sterling Infrastructure joining the S&P MidCap 400 from the S&P SmallCap 600.
Effective
August 27, 2025 at 5:00:00 PM
S&P index changes, August 2025: Interactive Brokers Group
On 25 August 2025, S&P Dow Jones Indices announced 6 index changes affecting 5 companies in the S&P 500, S&P MidCap 400 and S&P SmallCap 600. The most notable move was Interactive Brokers Group joining the S&P 500 from the S&P MidCap 400.
Effective
July 17, 2025 at 5:00:00 PM
S&P index changes, July 2025: AeroVironment
On 15 July 2025, S&P Dow Jones Indices announced 4 index changes affecting 3 companies in the S&P MidCap 400 and S&P SmallCap 600. The most notable move was AeroVironment joining the S&P MidCap 400 from the S&P SmallCap 600.
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