Last night U.S. time (5 Dec 2025), S&P Dow Jones Indices announced that three more companies will be added at the upcoming December rebalance:
CRH plc (CRH)
Carvana (CVNA)
Comfort Systems USA (FIX)
These are announced to join the S&P 500, with corresponding deletions and mid-cap/small-cap moves, but their inclusion becomes effective later in December (typical rebalance effective date is around the week of 19–22 Dec).