TKO — S&P 500 index addition

TKO Group Holdings (TKO) entered the S&P 500 at the close on Mar 24, 2025, replacing Teleflex. The recorded announcement came 17 calendar days before the effective close, on Mar 7, 2025. The company is classified in Communication Services in this dataset.

In the 30 calendar days leading into the effective close, TKO moved +8.4%. The median 30-day run-up among the 25 S&P 500 entries with a recorded announcement and prices for that interval was +16.9%; this stock was 8.5 percentage points below that median. Measured from the effective close, TKO returned 1W: -3.0% versus +0.3% for the 28-entry index median; 1M: +2.4% versus +2.2% for the 28-entry index median; 3M: +10.1% versus +5.2% for the 28-entry index median; 1Y: +10.1% versus +11.6% for the 24-entry index median. These figures do not measure movement from the announcement price.

At 1M, it ranks 14th of 28 measured S&P 500 additions and beat the benchmark by 4.1 percentage points. At 3M, it ranks 11th of 28 measured S&P 500 additions and beat the benchmark by 2.9 percentage points. At 1Y, it ranks 14th of 24 measured S&P 500 additions and lagged the benchmark by 13.8 percentage points. Ranks use available returns at the same window, not company size, and do not establish why prices moved.