S&P Dow Jones Indices and the index committee that determines the rules for how companies get added to the S&P500 determined that no changes would be made to their rules for the "seasoning period", after which companies can be added to the index. This is significant as many other major index providers have recently changed their rules regarding megacap stocks in light of the upcoming SpaceX IPO.
Source: https://www.spglobal.com/spdji/en/documents/indexnews/announcements/20260604-1483731/1483731_spdji-us-indices-megacaps-results-20260604.pdf