S&P Dow Jones Indices will adjust constituents of the S&P 100, S&P 500 and S&P MidCap 400 on Sept. 21, 2026, as part of an index rebalance. The S&P 100 will add Palo Alto Networks, Arista Networks, SanDisk Networks and Dell Technologies while removing Nike, Colgate-Palmolive and Honeywell Aerospace. Bloom Energy, Illumina and Everpure will join the S&P 500, while HubSpot, AGNC, Corcept and Brinker will join the S&P MidCap 400. The latest notice differs from the earlier record, which described broader changes across four indexes and a different set of constituent adjustments.